cinelerra-5.0/cinelerra/ffmpeg.C

   1
   2 #include <stdio.h>
   3 #include <stdint.h>
   4 #include <stdlib.h>
   5 #include <unistd.h>
   6 #include <string.h>
   7 #include <stdarg.h>
   8 #include <fcntl.h>
   9 #include <limits.h>
  10 // work arounds (centos)
  11 #include <lzma.h>
  12 #ifndef INT64_MAX
  13 #define INT64_MAX 9223372036854775807LL
  14 #endif
  15
  16 #include "asset.h"
  17 #include "bccmodels.h"
  18 #include "bchash.h"
  19 #include "fileffmpeg.h"
  20 #include "file.h"
  21 #include "ffmpeg.h"
  22 #include "indexfile.h"
  23 #include "libdv.h"
  24 #include "libmjpeg.h"
  25 #include "mainerror.h"
  26 #include "mwindow.h"
  27 #include "vframe.h"
  28
  29
  30 #define VIDEO_INBUF_SIZE 0x10000
  31 #define AUDIO_INBUF_SIZE 0x10000
  32 #define VIDEO_REFILL_THRESH 0
  33 #define AUDIO_REFILL_THRESH 0x1000
  34
  35 Mutex FFMPEG::fflock("FFMPEG::fflock");
  36
  37 static void ff_err(int ret, const char *fmt, ...)
  38 {
  39         char msg[BCTEXTLEN];
  40         va_list ap;
  41         va_start(ap, fmt);
  42         vsnprintf(msg, sizeof(msg), fmt, ap);
  43         va_end(ap);
  44         char errmsg[BCSTRLEN];
  45         av_strerror(ret, errmsg, sizeof(errmsg));
  46         fprintf(stderr,_("%s  err: %s\n"),msg, errmsg);
  47 }
  48
  49 FFPacket::FFPacket()
  50 {
  51         init();
  52 }
  53
  54 FFPacket::~FFPacket()
  55 {
  56         av_free_packet(&pkt);
  57 }
  58
  59 void FFPacket::init()
  60 {
  61         av_init_packet(&pkt);
  62         pkt.data = 0; pkt.size = 0;
  63 }
  64
  65 FFrame::FFrame(FFStream *fst)
  66 {
  67         this->fst = fst;
  68         frm = av_frame_alloc();
  69         init = fst->init_frame(frm);
  70 }
  71
  72 FFrame::~FFrame()
  73 {
  74         av_frame_free(&frm);
  75 }
  76
  77 void FFrame::queue(int64_t pos)
  78 {
  79         position = pos;
  80         fst->queue(this);
  81 }
  82
  83 void FFrame::dequeue()
  84 {
  85         fst->dequeue(this);
  86 }
  87
  88 int FFAudioStream::read(float *fp, long len)
  89 {
  90         long n = len * nch;
  91         float *op = outp;
  92         while( n > 0 ) {
  93                 int k = lmt - op;
  94                 if( k > n ) k = n;
  95                 n -= k;
  96                 while( --k >= 0 ) *fp++ = *op++;
  97                 if( op >= lmt ) op = bfr;
  98         }
  99         return len;
 100 }
 101
 102 void FFAudioStream::realloc(long nsz, int nch, long len)
 103 {
 104         long bsz = nsz * nch;
 105         float *np = new float[bsz];
 106         inp = np + read(np, len) * nch;
 107         outp = np;
 108         lmt = np + bsz;
 109         this->nch = nch;
 110         sz = nsz;
 111         delete [] bfr;  bfr = np;
 112 }
 113
 114 void FFAudioStream::realloc(long nsz, int nch)
 115 {
 116         if( nsz > sz || this->nch != nch ) {
 117                 long len = this->nch != nch ? 0 : hpos;
 118                 if( len > sz ) len = sz;
 119                 iseek(len);
 120                 realloc(nsz, nch, len);
 121         }
 122 }
 123
 124 void FFAudioStream::reserve(long nsz, int nch)
 125 {
 126         long len = (inp - outp) / nch;
 127         nsz += len;
 128         if( nsz > sz || this->nch != nch ) {
 129                 if( this->nch != nch ) len = 0;
 130                 realloc(nsz, nch, len);
 131                 return;
 132         }
 133         if( (len*=nch) > 0 && bfr != outp )
 134                 memmove(bfr, outp, len*sizeof(*bfr));
 135         outp = bfr;
 136         inp = bfr + len;
 137 }
 138
 139 long FFAudioStream::used()
 140 {
 141         long len = inp>=outp ? inp-outp : inp-bfr + lmt-outp;
 142         return len / nch;
 143 }
 144 long FFAudioStream::avail()
 145 {
 146         float *in1 = inp+1;
 147         if( in1 >= lmt ) in1 = bfr;
 148         long len = outp >= in1 ? outp-in1 : outp-bfr + lmt-in1;
 149         return len / nch;
 150 }
 151 void FFAudioStream::reset_history()
 152 {
 153         inp = outp = bfr;
 154         hpos = 0;
 155 }
 156
 157 void FFAudioStream::iseek(int64_t ofs)
 158 {
 159         outp = inp - ofs*nch;
 160         if( outp < bfr ) outp += sz*nch;
 161 }
 162
 163 float *FFAudioStream::get_outp(int ofs)
 164 {
 165         float *ret = outp;
 166         outp += ofs*nch;
 167         return ret;
 168 }
 169
 170 int64_t FFAudioStream::put_inp(int ofs)
 171 {
 172         inp += ofs*nch;
 173         return (inp-outp) / nch;
 174 }
 175
 176 int FFAudioStream::write(const float *fp, long len)
 177 {
 178         long n = len * nch;
 179         float *ip = inp;
 180         while( n > 0 ) {
 181                 int k = lmt - ip;
 182                 if( k > n ) k = n;
 183                 n -= k;
 184                 while( --k >= 0 ) *ip++ = *fp++;
 185                 if( ip >= lmt ) ip = bfr;
 186         }
 187         inp = ip;
 188         hpos += len;
 189         return len;
 190 }
 191
 192 int FFAudioStream::zero(long len)
 193 {
 194         long n = len * nch;
 195         float *ip = inp;
 196         while( n > 0 ) {
 197                 int k = lmt - ip;
 198                 if( k > n ) k = n;
 199                 n -= k;
 200                 while( --k >= 0 ) *ip++ = 0;
 201                 if( ip >= lmt ) ip = bfr;
 202         }
 203         inp = ip;
 204         hpos += len;
 205         return len;
 206 }
 207
 208 // does not advance outp
 209 int FFAudioStream::read(double *dp, long len, int ch)
 210 {
 211         long n = len;
 212         float *op = outp + ch;
 213         float *lmt1 = lmt + nch-1;
 214         while( n > 0 ) {
 215                 int k = (lmt1 - op) / nch;
 216                 if( k > n ) k = n;
 217                 n -= k;
 218                 while( --k >= 0 ) { *dp++ = *op;  op += nch; }
 219                 if( op >= lmt ) op -= sz*nch;
 220         }
 221         return len;
 222 }
 223
 224 // load linear buffer, no wrapping allowed, does not advance inp
 225 int FFAudioStream::write(const double *dp, long len, int ch)
 226 {
 227         long n = len;
 228         float *ip = inp + ch;
 229         while( --n >= 0 ) { *ip = *dp++;  ip += nch; }
 230         return len;
 231 }
 232
 233
 234 FFStream::FFStream(FFMPEG *ffmpeg, AVStream *st, int fidx)
 235 {
 236         this->ffmpeg = ffmpeg;
 237         this->st = st;
 238         this->fidx = fidx;
 239         frm_lock = new Mutex("FFStream::frm_lock");
 240         fmt_ctx = 0;
 241         filter_graph = 0;
 242         buffersrc_ctx = 0;
 243         buffersink_ctx = 0;
 244         frm_count = 0;
 245         nudge = AV_NOPTS_VALUE;
 246         seek_pos = curr_pos = 0;
 247         seeked = 1;  eof = 0;
 248         index_markers = 0;
 249         reading = writing = 0;
 250         flushed = 0;
 251         need_packet = 1;
 252         frame = fframe = 0;
 253 }
 254
 255 FFStream::~FFStream()
 256 {
 257         if( reading > 0 || writing > 0 ) avcodec_close(st->codec);
 258         if( fmt_ctx ) avformat_close_input(&fmt_ctx);
 259         while( frms.first ) frms.remove(frms.first);
 260         if( filter_graph ) avfilter_graph_free(&filter_graph);
 261         if( frame ) av_frame_free(&frame);
 262         if( fframe ) av_frame_free(&fframe);
 263         bsfilter.remove_all_objects();
 264         delete frm_lock;
 265 }
 266
 267 void FFStream::ff_lock(const char *cp)
 268 {
 269         FFMPEG::fflock.lock(cp);
 270 }
 271
 272 void FFStream::ff_unlock()
 273 {
 274         FFMPEG::fflock.unlock();
 275 }
 276
 277 void FFStream::queue(FFrame *frm)
 278 {
 279         frm_lock->lock("FFStream::queue");
 280         frms.append(frm);
 281         ++frm_count;
 282         frm_lock->unlock();
 283         ffmpeg->mux_lock->unlock();
 284 }
 285
 286 void FFStream::dequeue(FFrame *frm)
 287 {
 288         frm_lock->lock("FFStream::dequeue");
 289         --frm_count;
 290         frms.remove_pointer(frm);
 291         frm_lock->unlock();
 292 }
 293
 294 int FFStream::encode_activate()
 295 {
 296         if( writing < 0 )
 297                 writing = ffmpeg->encode_activate();
 298         return writing;
 299 }
 300
 301 int FFStream::decode_activate()
 302 {
 303         if( reading < 0 && (reading=ffmpeg->decode_activate()) > 0 ) {
 304                 ff_lock("FFStream::decode_activate");
 305                 reading = 0;
 306                 AVDictionary *copts = 0;
 307                 av_dict_copy(&copts, ffmpeg->opts, 0);
 308                 int ret = 0;
 309                 // this should be avformat_copy_context(), but no copy avail
 310                 ret = avformat_open_input(&fmt_ctx, ffmpeg->fmt_ctx->filename, NULL, &copts);
 311                 if( ret >= 0 ) {
 312                         ret = avformat_find_stream_info(fmt_ctx, 0);
 313                         st = fmt_ctx->streams[fidx];
 314                         load_markers();
 315                 }
 316                 if( ret >= 0 ) {
 317                         AVCodecID codec_id = st->codec->codec_id;
 318                         AVCodec *decoder = avcodec_find_decoder(codec_id);
 319                         ret = avcodec_open2(st->codec, decoder, &copts);
 320                         if( ret >= 0 )
 321                                 reading = 1;
 322                         else
 323                                 eprintf("FFStream::decode_activate: open decoder failed\n");
 324                 }
 325                 else
 326                         eprintf("FFStream::decode_activate: can't clone input file\n");
 327                 av_dict_free(&copts);
 328                 ff_unlock();
 329         }
 330         return reading;
 331 }
 332
 333 int FFStream::read_packet()
 334 {
 335         av_packet_unref(ipkt);
 336         int ret = av_read_frame(fmt_ctx, ipkt);
 337         if( ret < 0 ) {
 338                 st_eof(1);
 339                 if( ret == AVERROR_EOF ) {
 340                         ipkt->stream_index = st->index;
 341                         return 0;
 342                 }
 343                 ff_err(ret, "FFStream::read_packet: av_read_frame failed\n");
 344                 flushed = 1;
 345                 return -1;
 346         }
 347         return 1;
 348 }
 349
 350 int FFStream::decode(AVFrame *frame)
 351 {
 352         int ret = 0;
 353         int retries = 1000;
 354         int got_frame = 0;
 355
 356         while( ret >= 0 && !flushed && --retries >= 0 && !got_frame ) {
 357                 if( need_packet ) {
 358                         need_packet = 0;
 359                         if( (ret=read_packet()) < 0 ) break;
 360                 }
 361                 if( ipkt->stream_index == st->index ) {
 362                         while( (ipkt->size > 0 || !ipkt->data) && !got_frame ) {
 363                                 ret = decode_frame(ipkt, frame, got_frame);
 364                                 if( ret <= 0 || !ipkt->data ) break;
 365                                 ipkt->data += ret;
 366                                 ipkt->size -= ret;
 367                         }
 368                         retries = 1000;
 369                 }
 370                 if( !got_frame ) {
 371                         need_packet = 1;
 372                         flushed = st_eof();
 373                 }
 374         }
 375
 376         if( retries < 0 )
 377                 fprintf(stderr, "FFStream::decode: Retry limit\n");
 378         if( ret >= 0 )
 379                 ret = got_frame;
 380         else
 381                 fprintf(stderr, "FFStream::decode: failed\n");
 382
 383         return ret;
 384 }
 385
 386 int FFStream::load_filter(AVFrame *frame)
 387 {
 388         int ret = av_buffersrc_add_frame_flags(buffersrc_ctx,
 389                         frame, AV_BUFFERSRC_FLAG_KEEP_REF);
 390         if( ret < 0 ) {
 391                 av_frame_unref(frame);
 392                 eprintf("FFStream::load_filter: av_buffersrc_add_frame_flags failed\n");
 393         }
 394         return ret;
 395 }
 396
 397 int FFStream::read_filter(AVFrame *frame)
 398 {
 399         int ret = av_buffersink_get_frame(buffersink_ctx, frame);
 400         if( ret < 0 ) {
 401                 if( ret == AVERROR(EAGAIN) ) return 0;
 402                 if( ret == AVERROR_EOF ) { st_eof(1); return -1; }
 403                 ff_err(ret, "FFStream::read_filter: av_buffersink_get_frame failed\n");
 404                 return ret;
 405         }
 406         return 1;
 407 }
 408
 409 int FFStream::read_frame(AVFrame *frame)
 410 {
 411         if( !filter_graph || !buffersrc_ctx || !buffersink_ctx )
 412                 return decode(frame);
 413         if( !fframe && !(fframe=av_frame_alloc()) ) {
 414                 fprintf(stderr, "FFStream::read_frame: av_frame_alloc failed\n");
 415                 return -1;
 416         }
 417         int ret = -1;
 418         while( !flushed && !(ret=read_filter(frame)) ) {
 419                 if( (ret=decode(fframe)) < 0 ) break;
 420                 if( ret > 0 && (ret=load_filter(fframe)) < 0 ) break;
 421         }
 422         return ret;
 423 }
 424
 425 int FFStream::write_packet(FFPacket &pkt)
 426 {
 427         bs_filter(pkt);
 428         av_packet_rescale_ts(pkt, st->codec->time_base, st->time_base);
 429         pkt->stream_index = st->index;
 430         return av_interleaved_write_frame(ffmpeg->fmt_ctx, pkt);
 431 }
 432
 433 int FFStream::flush()
 434 {
 435         int ret = 0;
 436         while( ret >= 0 ) {
 437                 FFPacket pkt;
 438                 int got_packet = 0;
 439                 ret = encode_frame(pkt, 0, got_packet);
 440                 if( ret < 0 || !got_packet ) break;
 441                 ret = write_packet(pkt);
 442         }
 443         if( ret < 0 )
 444                 ff_err(ret, "FFStream::flush");
 445         return ret >= 0 ? 0 : 1;
 446 }
 447
 448 int FFStream::seek(int64_t no, double rate)
 449 {
 450         if( no < 0 ) no = 0;
 451 // default ffmpeg native seek
 452         int npkts = 1;
 453         int64_t pos = no, plmt = -1;
 454         if( index_markers && index_markers->size() > 1 ) {
 455                 IndexMarks &marks = *index_markers;
 456                 int i = marks.find(pos);
 457                 int64_t n = i < 0 ? (i=0) : marks[i].no;
 458 // if indexed seek point not too far away (<30 secs), use index
 459                 if( no-n < 30*rate ) {
 460                         if( n < 0 ) n = 0;
 461                         pos = n;
 462                         plmt = marks[i].pos;
 463                         npkts = 1000;
 464                 }
 465         }
 466         double secs = pos / rate;
 467         int64_t tstmp = secs * st->time_base.den / st->time_base.num;
 468         if( nudge != AV_NOPTS_VALUE ) tstmp += nudge;
 469         if( avformat_seek_file(fmt_ctx, st->index,
 470                 -INT64_MAX, tstmp, INT64_MAX, AVSEEK_FLAG_ANY) < 0 ) return -1;
 471         avcodec_flush_buffers(st->codec);
 472         need_packet = 0;  flushed = 0;
 473         seeked = 1;  st_eof(0);
 474         int64_t pkt_ts = AV_NOPTS_VALUE;
 475         int ret = 1, retry = 1000;
 476
 477 // read up to retry packets, limited to npkts in stream, and not past pkt.pos plmt
 478         while( ret > 0 && npkts > 0 && --retry >= 0 ) {
 479                 if( (ret=read_packet()) <= 0 ) break;
 480                 if( ipkt->stream_index != st->index ) continue;
 481                 if( (pkt_ts=ipkt->dts) == AV_NOPTS_VALUE ) pkt_ts = ipkt->pts;
 482                 if( pkt_ts != AV_NOPTS_VALUE && pkt_ts >= tstmp ) break;
 483                 if( plmt >= 0 && ipkt->pos >= plmt ) break;
 484                 --npkts;
 485         }
 486
 487         if( ret <= 0 || retry < 0 ) return -1;
 488         seek_pos = curr_pos = pos;
 489         return npkts > 0 ? 1 : 0;
 490 }
 491
 492 FFAudioStream::FFAudioStream(FFMPEG *ffmpeg, AVStream *strm, int idx, int fidx)
 493  : FFStream(ffmpeg, strm, fidx)
 494 {
 495         this->idx = idx;
 496         channel0 = channels = 0;
 497         sample_rate = 0;
 498         mbsz = 0;
 499         length = 0;
 500         resample_context = 0;
 501
 502         aud_bfr_sz = 0;
 503         aud_bfr = 0;
 504
 505 // history buffer
 506         nch = 2;
 507         sz = 0x10000;
 508         long bsz = sz * nch;
 509         bfr = new float[bsz];
 510         lmt = bfr + bsz;
 511         reset_history();
 512 }
 513
 514 FFAudioStream::~FFAudioStream()
 515 {
 516         if( resample_context ) swr_free(&resample_context);
 517         delete [] aud_bfr;
 518         delete [] bfr;
 519 }
 520
 521 int FFAudioStream::get_samples(float *&samples, uint8_t **data, int len)
 522 {
 523         samples = *(float **)data;
 524         if( resample_context ) {
 525                 if( len > aud_bfr_sz ) {
 526                         delete [] aud_bfr;
 527                         aud_bfr = 0;
 528                 }
 529                 if( !aud_bfr ) {
 530                         aud_bfr_sz = len;
 531                         aud_bfr = new float[aud_bfr_sz*channels];
 532                 }
 533                 int ret = swr_convert(resample_context,
 534                         (uint8_t**)&aud_bfr, aud_bfr_sz, (const uint8_t**)data, len);
 535                 if( ret < 0 ) {
 536                         ff_err(ret, "FFAudioStream::get_samples: swr_convert failed\n");
 537                         return -1;
 538                 }
 539                 samples = aud_bfr;
 540                 len = ret;
 541         }
 542         return len;
 543 }
 544
 545 int FFAudioStream::load_history(uint8_t **data, int len)
 546 {
 547         float *samples;
 548         len = get_samples(samples, data, len);
 549         if( len > 0 ) {
 550                 // biggest user bfr since seek + frame
 551                 realloc(mbsz + len + 1, channels);
 552                 write(samples, len);
 553         }
 554         return len;
 555 }
 556
 557 int FFAudioStream::decode_frame(AVPacket *pkt, AVFrame *frame, int &got_frame)
 558 {
 559         int first_frame = seeked;  seeked = 0;
 560         int ret = avcodec_decode_audio4(st->codec, frame, &got_frame, pkt);
 561         if( ret < 0 ) {
 562                 if( first_frame ) return 0;
 563                 ff_err(ret, "FFAudioStream::decode_frame: Could not read audio frame\n");
 564                 return -1;
 565         }
 566         if( got_frame ) {
 567                 int64_t pkt_ts = av_frame_get_best_effort_timestamp(frame);
 568                 if( pkt_ts != AV_NOPTS_VALUE )
 569                         curr_pos = ffmpeg->to_secs(pkt_ts - nudge, st->time_base) * sample_rate + 0.5;
 570         }
 571         return ret;
 572 }
 573
 574 int FFAudioStream::encode_activate()
 575 {
 576         if( writing >= 0 ) return writing;
 577         AVCodecContext *ctx = st->codec;
 578         frame_sz = ctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE ?
 579                 10000 : ctx->frame_size;
 580         return FFStream::encode_activate();
 581 }
 582
 583 int FFAudioStream::nb_samples()
 584 {
 585         AVCodecContext *ctx = st->codec;
 586         return ctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE ?
 587                 10000 : ctx->frame_size;
 588 }
 589
 590 int64_t FFAudioStream::load_buffer(double ** const sp, int len)
 591 {
 592         reserve(len+1, st->codec->channels);
 593         for( int ch=0; ch<nch; ++ch )
 594                 write(sp[ch], len, ch);
 595         return put_inp(len);
 596 }
 597
 598 int FFAudioStream::in_history(int64_t pos)
 599 {
 600         if( pos > curr_pos ) return 0;
 601         int64_t len = hpos;
 602         if( len > sz ) len = sz;
 603         if( pos < curr_pos - len ) return 0;
 604         return 1;
 605 }
 606
 607
 608 int FFAudioStream::init_frame(AVFrame *frame)
 609 {
 610         AVCodecContext *ctx = st->codec;
 611         frame->nb_samples = frame_sz;
 612         frame->format = ctx->sample_fmt;
 613         frame->channel_layout = ctx->channel_layout;
 614         frame->sample_rate = ctx->sample_rate;
 615         int ret = av_frame_get_buffer(frame, 0);
 616         if (ret < 0)
 617                 ff_err(ret, "FFAudioStream::init_frame: av_frame_get_buffer failed\n");
 618         return ret;
 619 }
 620
 621 int FFAudioStream::load(int64_t pos, int len)
 622 {
 623         if( audio_seek(pos) < 0 ) return -1;
 624         if( !frame && !(frame=av_frame_alloc()) ) {
 625                 fprintf(stderr, "FFAudioStream::load: av_frame_alloc failed\n");
 626                 return -1;
 627         }
 628         if( mbsz < len ) mbsz = len;
 629         int64_t end_pos = pos + len;
 630         int ret = 0;
 631         for( int i=0; ret>=0 && !flushed && curr_pos<end_pos && i<1000; ++i ) {
 632                 ret = read_frame(frame);
 633                 if( ret > 0 ) {
 634                         load_history(&frame->extended_data[0], frame->nb_samples);
 635                         curr_pos += frame->nb_samples;
 636                 }
 637         }
 638         if( end_pos > curr_pos ) {
 639                 zero(end_pos - curr_pos);
 640                 curr_pos = end_pos;
 641         }
 642         len = curr_pos - pos;
 643         iseek(len);
 644         return len;
 645 }
 646
 647 int FFAudioStream::audio_seek(int64_t pos)
 648 {
 649         if( decode_activate() < 0 ) return -1;
 650         if( !st->codec || !st->codec->codec ) return -1;
 651         if( in_history(pos) ) return 0;
 652         if( pos == curr_pos ) return 0;
 653         reset_history();  mbsz = 0;
 654 // guarentee preload > 1sec samples
 655         if( seek(pos-sample_rate, sample_rate) < 0 ) return -1;
 656         return 1;
 657 }
 658
 659 int FFAudioStream::encode(double **samples, int len)
 660 {
 661         if( encode_activate() <= 0 ) return -1;
 662         ffmpeg->flow_ctl();
 663         int ret = 0;
 664         int64_t count = load_buffer(samples, len);
 665         FFrame *frm = 0;
 666
 667         while( ret >= 0 && count >= frame_sz ) {
 668                 frm = new FFrame(this);
 669                 if( (ret=frm->initted()) < 0 ) break;
 670                 AVFrame *frame = *frm;
 671                 float *bfrp = get_outp(frame_sz);
 672                 ret =  swr_convert(resample_context,
 673                         (uint8_t **)frame->extended_data, frame_sz,
 674                         (const uint8_t **)&bfrp, frame_sz);
 675                 if( ret < 0 ) {
 676                         ff_err(ret, "FFAudioStream::encode: swr_convert failed\n");
 677                         break;
 678                 }
 679                 frm->queue(curr_pos);
 680                 frm = 0;
 681                 curr_pos += frame_sz;
 682                 count -= frame_sz;
 683         }
 684
 685         delete frm;
 686         return ret >= 0 ? 0 : 1;
 687 }
 688
 689 int FFAudioStream::encode_frame(AVPacket *pkt, AVFrame *frame, int &got_packet)
 690 {
 691         int ret = avcodec_encode_audio2(st->codec, pkt, frame, &got_packet);
 692         if( ret < 0 ) {
 693                 ff_err(ret, "FFAudioStream::encode_frame: encode audio failed\n");
 694                 return -1;
 695         }
 696         return ret;
 697 }
 698
 699 void FFAudioStream::load_markers()
 700 {
 701         IndexState *index_state = ffmpeg->file_base->asset->index_state;
 702         if( !index_state || idx >= index_state->audio_markers.size() ) return;
 703         FFStream::load_markers(*index_state->audio_markers[idx], sample_rate);
 704 }
 705
 706 FFVideoStream::FFVideoStream(FFMPEG *ffmpeg, AVStream *strm, int idx, int fidx)
 707  : FFStream(ffmpeg, strm, fidx)
 708 {
 709         this->idx = idx;
 710         width = height = 0;
 711         frame_rate = 0;
 712         aspect_ratio = 0;
 713         length = 0;
 714 }
 715
 716 FFVideoStream::~FFVideoStream()
 717 {
 718 }
 719
 720 int FFVideoStream::decode_frame(AVPacket *pkt, AVFrame *frame, int &got_frame)
 721 {
 722         int first_frame = seeked;  seeked = 0;
 723         int ret = avcodec_decode_video2(st->codec, frame, &got_frame, pkt);
 724         if( ret < 0 ) {
 725                 if( first_frame ) return 0;
 726                 ff_err(ret, "FFVideoStream::decode_frame: Could not read video frame\n");
 727                 return -1;
 728         }
 729         if( got_frame ) {
 730                 int64_t pkt_ts = av_frame_get_best_effort_timestamp(frame);
 731                 if( pkt_ts != AV_NOPTS_VALUE )
 732                         curr_pos = ffmpeg->to_secs(pkt_ts - nudge, st->time_base) * frame_rate + 0.5;
 733         }
 734         return ret;
 735 }
 736
 737 int FFVideoStream::load(VFrame *vframe, int64_t pos)
 738 {
 739         int ret = video_seek(pos);
 740         if( ret < 0 ) return -1;
 741         if( !frame && !(frame=av_frame_alloc()) ) {
 742                 fprintf(stderr, "FFVideoStream::load: av_frame_alloc failed\n");
 743                 return -1;
 744         }
 745         for( int i=0; ret>=0 && !flushed && curr_pos<=pos && i<1000; ++i ) {
 746                 ret = read_frame(frame);
 747                 if( ret > 0 ) ++curr_pos;
 748         }
 749         if( ret > 0 ) {
 750                 AVCodecContext *ctx = st->codec;
 751                 ret = convert_cmodel(vframe, (AVPicture *)frame,
 752                         ctx->pix_fmt, ctx->width, ctx->height);
 753         }
 754         ret = ret > 0 ? 1 : ret < 0 ? -1 : 0;
 755         return ret;
 756 }
 757
 758 int FFVideoStream::video_seek(int64_t pos)
 759 {
 760         if( decode_activate() < 0 ) return -1;
 761         if( !st->codec || !st->codec->codec ) return -1;
 762         if( pos == curr_pos-1 && !seeked ) return 0;
 763 // if close enough, just read up to current
 764         int gop = st->codec->gop_size;
 765         if( gop < 4 ) gop = 4;
 766         if( gop > 64 ) gop = 64;
 767         int read_limit = curr_pos + 3*gop;
 768         if( pos >= curr_pos && pos <= read_limit ) return 0;
 769 // guarentee preload more than 2*gop frames
 770         if( seek(pos - 3*gop, frame_rate) < 0 ) return -1;
 771         return 1;
 772 }
 773
 774 int FFVideoStream::init_frame(AVFrame *picture)
 775 {
 776         AVCodecContext *ctx = st->codec;
 777         picture->format = ctx->pix_fmt;
 778         picture->width  = ctx->width;
 779         picture->height = ctx->height;
 780         int ret = av_frame_get_buffer(picture, 32);
 781         return ret;
 782 }
 783
 784 int FFVideoStream::encode(VFrame *vframe)
 785 {
 786         if( encode_activate() <= 0 ) return -1;
 787         ffmpeg->flow_ctl();
 788         FFrame *picture = new FFrame(this);
 789         int ret = picture->initted();
 790         if( ret >= 0 ) {
 791                 AVFrame *frame = *picture;
 792                 frame->pts = curr_pos;
 793                 AVCodecContext *ctx = st->codec;
 794                 ret = convert_pixfmt(vframe, (AVPicture*)frame,
 795                         ctx->pix_fmt, ctx->width, ctx->height);
 796         }
 797         if( ret >= 0 ) {
 798                 picture->queue(curr_pos);
 799                 ++curr_pos;
 800         }
 801         else {
 802                 fprintf(stderr, "FFVideoStream::encode: encode failed\n");
 803                 delete picture;
 804         }
 805         return ret >= 0 ? 0 : 1;
 806 }
 807
 808 int FFVideoStream::encode_frame(AVPacket *pkt, AVFrame *frame, int &got_packet)
 809 {
 810         int ret = avcodec_encode_video2(st->codec, pkt, frame, &got_packet);
 811         if( ret < 0 ) {
 812                 ff_err(ret, "FFVideoStream::encode_frame: encode video failed\n");
 813                 return -1;
 814         }
 815         return ret;
 816 }
 817
 818 PixelFormat FFVideoConvert::color_model_to_pix_fmt(int color_model)
 819 {
 820         switch( color_model ) {
 821         case BC_YUV422:         return AV_PIX_FMT_YUYV422;
 822         case BC_RGB888:         return AV_PIX_FMT_RGB24;
 823         case BC_RGBA8888:       return AV_PIX_FMT_RGBA;
 824         case BC_BGR8888:        return AV_PIX_FMT_BGR0;
 825         case BC_BGR888:         return AV_PIX_FMT_BGR24;
 826         case BC_YUV420P:        return AV_PIX_FMT_YUV420P;
 827         case BC_YUV422P:        return AV_PIX_FMT_YUV422P;
 828         case BC_YUV444P:        return AV_PIX_FMT_YUV444P;
 829         case BC_YUV411P:        return AV_PIX_FMT_YUV411P;
 830         case BC_RGB565:         return AV_PIX_FMT_RGB565;
 831         case BC_RGB161616:      return AV_PIX_FMT_RGB48LE;
 832         case BC_RGBA16161616:   return AV_PIX_FMT_RGBA64LE;
 833         default: break;
 834         }
 835
 836         return AV_PIX_FMT_NB;
 837 }
 838
 839 int FFVideoConvert::pix_fmt_to_color_model(PixelFormat pix_fmt)
 840 {
 841         switch (pix_fmt) {
 842         case AV_PIX_FMT_YUYV422:        return BC_YUV422;
 843         case AV_PIX_FMT_RGB24:          return BC_RGB888;
 844         case AV_PIX_FMT_RGBA:           return BC_RGBA8888;
 845         case AV_PIX_FMT_BGR0:           return BC_BGR8888;
 846         case AV_PIX_FMT_BGR24:          return BC_BGR888;
 847         case AV_PIX_FMT_YUV420P:        return BC_YUV420P;
 848         case AV_PIX_FMT_YUV422P:        return BC_YUV422P;
 849         case AV_PIX_FMT_YUV444P:        return BC_YUV444P;
 850         case AV_PIX_FMT_YUV411P:        return BC_YUV411P;
 851         case AV_PIX_FMT_RGB565:         return BC_RGB565;
 852         case AV_PIX_FMT_RGB48LE:        return BC_RGB161616;
 853         case AV_PIX_FMT_RGBA64LE:       return BC_RGBA16161616;
 854         default: break;
 855         }
 856
 857         return BC_TRANSPARENCY;
 858 }
 859
 860 int FFVideoConvert::convert_picture_vframe(VFrame *frame,
 861                 AVPicture *ip, PixelFormat ifmt, int iw, int ih)
 862 {
 863         AVPicture opic;
 864         int cmodel = frame->get_color_model();
 865         PixelFormat ofmt = color_model_to_pix_fmt(cmodel);
 866         if( ofmt == AV_PIX_FMT_NB ) return -1;
 867         int size = avpicture_fill(&opic, frame->get_data(), ofmt,
 868                                   frame->get_w(), frame->get_h());
 869         if( size < 0 ) return -1;
 870
 871         // transfer line sizes must match also
 872         int planar = BC_CModels::is_planar(cmodel);
 873         int packed_width = !planar ? frame->get_bytes_per_line() :
 874                  BC_CModels::calculate_pixelsize(cmodel) * frame->get_w();
 875         if( packed_width != opic.linesize[0] )  return -1;
 876
 877         if( planar ) {
 878                 // override avpicture_fill() for planar types
 879                 opic.data[0] = frame->get_y();
 880                 opic.data[1] = frame->get_u();
 881                 opic.data[2] = frame->get_v();
 882         }
 883
 884         convert_ctx = sws_getCachedContext(convert_ctx, iw, ih, ifmt,
 885                 frame->get_w(), frame->get_h(), ofmt, SWS_BICUBIC, NULL, NULL, NULL);
 886         if( !convert_ctx ) {
 887                 fprintf(stderr, "FFVideoConvert::convert_picture_frame:"
 888                                 " sws_getCachedContext() failed\n");
 889                 return -1;
 890         }
 891         int ret = sws_scale(convert_ctx, ip->data, ip->linesize, 0, ih,
 892             opic.data, opic.linesize);
 893         if( ret < 0 ) {
 894                 ff_err(ret, "FFVideoConvert::convert_picture_frame: sws_scale() failed\n");
 895                 return -1;
 896         }
 897         return 0;
 898 }
 899
 900 int FFVideoConvert::convert_cmodel(VFrame *frame,
 901                  AVPicture *ip, PixelFormat ifmt, int iw, int ih)
 902 {
 903         // try direct transfer
 904         if( !convert_picture_vframe(frame, ip, ifmt, iw, ih) ) return 1;
 905         // use indirect transfer
 906         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(ifmt);
 907         int max_bits = 0;
 908         for( int i = 0; i <desc->nb_components; ++i ) {
 909                 int bits = desc->comp[i].depth_minus1 + 1;
 910                 if( bits > max_bits ) max_bits = bits;
 911         }
 912 // from libavcodec/pixdesc.c
 913 #define pixdesc_has_alpha(pixdesc) ((pixdesc)->nb_components == 2 || \
 914  (pixdesc)->nb_components == 4 || (pixdesc)->flags & AV_PIX_FMT_FLAG_PAL)
 915         int icolor_model = pixdesc_has_alpha(desc) ?
 916                 (max_bits > 8 ? BC_RGBA16161616 : BC_RGBA8888) :
 917                 (max_bits > 8 ? BC_RGB161616 : BC_RGB888) ;
 918         VFrame vframe(iw, ih, icolor_model);
 919         if( convert_picture_vframe(&vframe, ip, ifmt, iw, ih) ) return -1;
 920         frame->transfer_from(&vframe);
 921         return 1;
 922 }
 923
 924 int FFVideoConvert::transfer_cmodel(VFrame *frame,
 925                  AVFrame *ifp, PixelFormat ifmt, int iw, int ih)
 926 {
 927         int ret = convert_cmodel(frame, (AVPicture *)ifp, ifmt, iw, ih);
 928         if( ret > 0 ) {
 929                 const AVDictionary *src = av_frame_get_metadata(ifp);
 930                 AVDictionaryEntry *t = NULL;
 931                 BC_Hash *hp = frame->get_params();
 932                 //hp->clear();
 933                 while( (t=av_dict_get(src, "", t, AV_DICT_IGNORE_SUFFIX)) )
 934                         hp->update(t->key, t->value);
 935         }
 936         return ret;
 937 }
 938
 939 int FFVideoConvert::convert_vframe_picture(VFrame *frame,
 940                 AVPicture *op, PixelFormat ofmt, int ow, int oh)
 941 {
 942         AVPicture opic;
 943         int cmodel = frame->get_color_model();
 944         PixelFormat ifmt = color_model_to_pix_fmt(cmodel);
 945         if( ifmt == AV_PIX_FMT_NB ) return -1;
 946         int size = avpicture_fill(&opic, frame->get_data(), ifmt,
 947                                   frame->get_w(), frame->get_h());
 948         if( size < 0 ) return -1;
 949
 950         // transfer line sizes must match also
 951         int planar = BC_CModels::is_planar(cmodel);
 952         int packed_width = !planar ? frame->get_bytes_per_line() :
 953                  BC_CModels::calculate_pixelsize(cmodel) * frame->get_w();
 954         if( packed_width != opic.linesize[0] )  return -1;
 955
 956         if( planar ) {
 957                 // override avpicture_fill() for planar types
 958                 opic.data[0] = frame->get_y();
 959                 opic.data[1] = frame->get_u();
 960                 opic.data[2] = frame->get_v();
 961         }
 962
 963         convert_ctx = sws_getCachedContext(convert_ctx, frame->get_w(), frame->get_h(), ifmt,
 964                 ow, oh, ofmt, SWS_BICUBIC, NULL, NULL, NULL);
 965         if( !convert_ctx ) {
 966                 fprintf(stderr, "FFVideoConvert::convert_frame_picture:"
 967                                 " sws_getCachedContext() failed\n");
 968                 return -1;
 969         }
 970         int ret = sws_scale(convert_ctx, opic.data, opic.linesize, 0, frame->get_h(),
 971                         op->data, op->linesize);
 972         if( ret < 0 ) {
 973                 ff_err(ret, "FFVideoConvert::convert_frame_picture: sws_scale() failed\n");
 974                 return -1;
 975         }
 976         return 0;
 977 }
 978
 979 int FFVideoConvert::convert_pixfmt(VFrame *frame,
 980                  AVPicture *op, PixelFormat ofmt, int ow, int oh)
 981 {
 982         // try direct transfer
 983         if( !convert_vframe_picture(frame, op, ofmt, ow, oh) ) return 1;
 984         // use indirect transfer
 985         int colormodel = frame->get_color_model();
 986         int bits = BC_CModels::calculate_pixelsize(colormodel) * 8;
 987         bits /= BC_CModels::components(colormodel);
 988         int icolor_model =  BC_CModels::has_alpha(colormodel) ?
 989                 (bits > 8 ? BC_RGBA16161616 : BC_RGBA8888) :
 990                 (bits > 8 ? BC_RGB161616: BC_RGB888) ;
 991         VFrame vframe(frame->get_w(), frame->get_h(), icolor_model);
 992         vframe.transfer_from(frame);
 993         if( !convert_vframe_picture(&vframe, op, ofmt, ow, oh) ) return 1;
 994         return -1;
 995 }
 996
 997 int FFVideoConvert::transfer_pixfmt(VFrame *frame,
 998                  AVFrame *ofp, PixelFormat ofmt, int ow, int oh)
 999 {
1000         int ret = convert_pixfmt(frame, (AVPicture *)ofp, ofmt, ow, oh);
1001         if( ret > 0 ) {
1002                 BC_Hash *hp = frame->get_params();
1003                 AVDictionary **dict = avpriv_frame_get_metadatap(ofp);
1004                 //av_dict_free(dict);
1005                 for( int i=0; i<hp->size(); ++i ) {
1006                         char *key = hp->get_key(i), *val = hp->get_value(i);
1007                         av_dict_set(dict, key, val, 0);
1008                 }
1009         }
1010         return ret;
1011 }
1012
1013 void FFVideoStream::load_markers()
1014 {
1015         IndexState *index_state = ffmpeg->file_base->asset->index_state;
1016         if( idx >= index_state->video_markers.size() ) return;
1017         FFStream::load_markers(*index_state->video_markers[idx], frame_rate);
1018 }
1019
1020
1021 FFMPEG::FFMPEG(FileBase *file_base)
1022 {
1023         fmt_ctx = 0;
1024         this->file_base = file_base;
1025         memset(file_format,0,sizeof(file_format));
1026         mux_lock = new Condition(0,"FFMPEG::mux_lock",0);
1027         flow_lock = new Condition(1,"FFStream::flow_lock",0);
1028         done = -1;
1029         flow = 1;
1030         decoding = encoding = 0;
1031         has_audio = has_video = 0;
1032         opts = 0;
1033         opt_duration = -1;
1034         opt_video_filter = 0;
1035         opt_audio_filter = 0;
1036         char option_path[BCTEXTLEN];
1037         set_option_path(option_path, "%s", "ffmpeg.opts");
1038         read_options(option_path, opts);
1039 }
1040
1041 FFMPEG::~FFMPEG()
1042 {
1043         ff_lock("FFMPEG::~FFMPEG()");
1044         close_encoder();
1045         ffaudio.remove_all_objects();
1046         ffvideo.remove_all_objects();
1047         if( fmt_ctx ) avformat_close_input(&fmt_ctx);
1048         ff_unlock();
1049         delete flow_lock;
1050         delete mux_lock;
1051         av_dict_free(&opts);
1052         delete [] opt_video_filter;
1053         delete [] opt_audio_filter;
1054 }
1055
1056 int FFMPEG::check_sample_rate(AVCodec *codec, int sample_rate)
1057 {
1058         const int *p = codec->supported_samplerates;
1059         if( !p ) return sample_rate;
1060         while( *p != 0 ) {
1061                 if( *p == sample_rate ) return *p;
1062                 ++p;
1063         }
1064         return 0;
1065 }
1066
1067 static inline AVRational std_frame_rate(int i)
1068 {
1069         static const int m1 = 1001*12, m2 = 1000*12;
1070         static const int freqs[] = {
1071                 40*m1, 48*m1, 50*m1, 60*m1, 80*m1,120*m1, 240*m1,
1072                 24*m2, 30*m2, 60*m2, 12*m2, 15*m2, 48*m2, 0,
1073         };
1074         int freq = i<30*12 ? (i+1)*1001 : freqs[i-30*12];
1075         return (AVRational) { freq, 1001*12 };
1076 }
1077
1078 AVRational FFMPEG::check_frame_rate(AVCodec *codec, double frame_rate)
1079 {
1080         const AVRational *p = codec->supported_framerates;
1081         AVRational rate, best_rate = (AVRational) { 0, 0 };
1082         double max_err = 1.;  int i = 0;
1083         while( ((p ? (rate=*p++) : (rate=std_frame_rate(i++))), rate.num) != 0 ) {
1084                 double framerate = (double) rate.num / rate.den;
1085                 double err = fabs(frame_rate/framerate - 1.);
1086                 if( err >= max_err ) continue;
1087                 max_err = err;
1088                 best_rate = rate;
1089         }
1090         return max_err < 0.0001 ? best_rate : (AVRational) { 0, 0 };
1091 }
1092
1093 AVRational FFMPEG::to_sample_aspect_ratio(Asset *asset)
1094 {
1095 #if 1
1096         double display_aspect = asset->width / (double)asset->height;
1097         double sample_aspect = asset->aspect_ratio / display_aspect;
1098         int width = 1000000, height = width * sample_aspect + 0.5;
1099         float w, h;
1100         MWindow::create_aspect_ratio(w, h, width, height);
1101         return (AVRational){(int)h, (int)w};
1102 #else
1103 // square pixels
1104         return (AVRational){1, 1};
1105 #endif
1106 }
1107
1108 AVRational FFMPEG::to_time_base(int sample_rate)
1109 {
1110         return (AVRational){1, sample_rate};
1111 }
1112
1113 void FFMPEG::set_option_path(char *path, const char *fmt, ...)
1114 {
1115         get_exe_path(path);
1116         strcat(path, "/ffmpeg/");
1117         path += strlen(path);
1118         va_list ap;
1119         va_start(ap, fmt);
1120         vsprintf(path, fmt, ap);
1121         va_end(ap);
1122 }
1123
1124 void FFMPEG::get_option_path(char *path, const char *type, const char *spec)
1125 {
1126         if( *spec == '/' )
1127                 strcpy(path, spec);
1128         else
1129                 set_option_path(path, "%s/%s", type, spec);
1130 }
1131
1132 int FFMPEG::get_format(char *format, const char *path, char *spec)
1133 {
1134         char option_path[BCTEXTLEN], line[BCTEXTLEN], codec[BCTEXTLEN];
1135         get_option_path(option_path, path, spec);
1136         FILE *fp = fopen(option_path,"r");
1137         if( !fp ) return 1;
1138         int ret = 0;
1139         if( !fgets(line, sizeof(line), fp) ) ret = 1;
1140         if( !ret ) {
1141                 line[sizeof(line)-1] = 0;
1142                 ret = scan_option_line(line, format, codec);
1143         }
1144         fclose(fp);
1145         return ret;
1146 }
1147
1148 int FFMPEG::get_file_format()
1149 {
1150         int ret = 0;
1151         char audio_format[BCSTRLEN], video_format[BCSTRLEN];
1152         file_format[0] = audio_format[0] = video_format[0] = 0;
1153         Asset *asset = file_base->asset;
1154         if( !ret && asset->audio_data )
1155                 ret = get_format(audio_format, "audio", asset->acodec);
1156         if( !ret && asset->video_data )
1157                 ret = get_format(video_format, "video", asset->vcodec);
1158         if( !ret && !audio_format[0] && !video_format[0] )
1159                 ret = 1;
1160         if( !ret && audio_format[0] && video_format[0] &&
1161             strcmp(audio_format, video_format) ) ret = -1;
1162         if( !ret )
1163                 strcpy(file_format, audio_format[0] ? audio_format : video_format);
1164         return ret;
1165 }
1166
1167 int FFMPEG::scan_option_line(char *cp, char *tag, char *val)
1168 {
1169         while( *cp == ' ' || *cp == '\t' ) ++cp;
1170         char *bp = cp;
1171         while( *cp && *cp != ' ' && *cp != '\t' && *cp != '=' ) ++cp;
1172         int len = cp - bp;
1173         if( !len || len > BCSTRLEN-1 ) return 1;
1174         while( bp < cp ) *tag++ = *bp++;
1175         *tag = 0;
1176         while( *cp == ' ' || *cp == '\t' ) ++cp;
1177         if( *cp == '=' ) ++cp;
1178         while( *cp == ' ' || *cp == '\t' ) ++cp;
1179         bp = cp;
1180         while( *cp && *cp != '\n' ) ++cp;
1181         len = cp - bp;
1182         if( len > BCTEXTLEN-1 ) return 1;
1183         while( bp < cp ) *val++ = *bp++;
1184         *val = 0;
1185         return 0;
1186 }
1187
1188 int FFMPEG::get_encoder(const char *options,
1189                 char *format, char *codec, char *bsfilter, char *bsargs)
1190 {
1191         FILE *fp = fopen(options,"r");
1192         if( !fp ) {
1193                 eprintf("FFMPEG::get_encoder: options open failed %s\n",options);
1194                 return 1;
1195         }
1196         if( get_encoder(fp, format, codec, bsfilter, bsargs) )
1197                 eprintf(_("FFMPEG::get_encoder:"
1198                           " err: format/codec not found %s\n"), options);
1199         fclose(fp);
1200         return 0;
1201 }
1202
1203 int FFMPEG::get_encoder(FILE *fp,
1204                 char *format, char *codec, char *bsfilter, char *bsargs)
1205 {
1206         format[0] = codec[0] = bsfilter[0] = bsargs[0] = 0;
1207         char line[BCTEXTLEN];
1208         if( !fgets(line, sizeof(line), fp) ) return 1;
1209         line[sizeof(line)-1] = 0;
1210         if( scan_option_line(line, format, codec) ) return 1;
1211         char *cp = codec;
1212         while( *cp && *cp != '|' ) ++cp;
1213         if( !*cp ) return 0;
1214         if( scan_option_line(cp+1, bsfilter, bsargs) ) return 1;
1215         do { *cp-- = 0; } while( cp>=codec && (*cp==' ' || *cp == '\t' ) );
1216         return 0;
1217 }
1218
1219 int FFMPEG::read_options(const char *options, AVDictionary *&opts)
1220 {
1221         FILE *fp = fopen(options,"r");
1222         if( !fp ) return 1;
1223         int ret = read_options(fp, options, opts);
1224         fclose(fp);
1225         return ret;
1226 }
1227
1228 int FFMPEG::scan_options(const char *options, AVDictionary *&opts, AVStream *st)
1229 {
1230         FILE *fp = fmemopen((void *)options,strlen(options),"r");
1231         if( !fp ) return 0;
1232         int ret = read_options(fp, options, opts);
1233         fclose(fp);
1234         AVDictionaryEntry *tag = av_dict_get(opts, "id", NULL, 0);
1235         if( tag ) st->id = strtol(tag->value,0,0);
1236         return ret;
1237 }
1238
1239 int FFMPEG::read_options(FILE *fp, const char *options, AVDictionary *&opts)
1240 {
1241         int ret = 0, no = 0;
1242         char line[BCTEXTLEN];
1243         while( !ret && fgets(line, sizeof(line), fp) ) {
1244                 line[sizeof(line)-1] = 0;
1245                 ++no;
1246                 if( line[0] == '#' ) continue;
1247                 if( line[0] == '\n' ) continue;
1248                 char key[BCSTRLEN], val[BCTEXTLEN];
1249                 if( scan_option_line(line, key, val) ) {
1250                         eprintf(_("FFMPEG::read_options:"
1251                                   " err reading %s: line %d\n"), options, no);
1252                         ret = 1;
1253                 }
1254                 if( !ret ) {
1255                         if( !strcmp(key, "duration") )
1256                                 opt_duration = strtod(val, 0);
1257                         if( !strcmp(key, "video_filter") )
1258                                 opt_video_filter = cstrdup(val);
1259                         if( !strcmp(key, "audio_filter") )
1260                                 opt_audio_filter = cstrdup(val);
1261                         else if( !strcmp(key, "loglevel") )
1262                                 set_loglevel(val);
1263                         else
1264                                 av_dict_set(&opts, key, val, 0);
1265                 }
1266         }
1267         return ret;
1268 }
1269
1270 int FFMPEG::load_options(const char *options, AVDictionary *&opts)
1271 {
1272         char option_path[BCTEXTLEN];
1273         set_option_path(option_path, "%s", options);
1274         return read_options(option_path, opts);
1275 }
1276
1277 int FFMPEG::load_options(const char *path, char *bfr, int len)
1278 {
1279         *bfr = 0;
1280         FILE *fp = fopen(path, "r");
1281         if( !fp ) return 1;
1282         fgets(bfr, len, fp); // skip hdr
1283         len = fread(bfr, 1, len-1, fp);
1284         if( len < 0 ) len = 0;
1285         bfr[len] = 0;
1286         fclose(fp);
1287         return 0;
1288 }
1289
1290 void FFMPEG::set_loglevel(const char *ap)
1291 {
1292         if( !ap || !*ap ) return;
1293         const struct {
1294                 const char *name;
1295                 int level;
1296         } log_levels[] = {
1297                 { "quiet"  , AV_LOG_QUIET   },
1298                 { "panic"  , AV_LOG_PANIC   },
1299                 { "fatal"  , AV_LOG_FATAL   },
1300                 { "error"  , AV_LOG_ERROR   },
1301                 { "warning", AV_LOG_WARNING },
1302                 { "info"   , AV_LOG_INFO    },
1303                 { "verbose", AV_LOG_VERBOSE },
1304                 { "debug"  , AV_LOG_DEBUG   },
1305         };
1306         for( int i=0; i<(int)(sizeof(log_levels)/sizeof(log_levels[0])); ++i ) {
1307                 if( !strcmp(log_levels[i].name, ap) ) {
1308                         av_log_set_level(log_levels[i].level);
1309                         return;
1310                 }
1311         }
1312         av_log_set_level(atoi(ap));
1313 }
1314
1315 double FFMPEG::to_secs(int64_t time, AVRational time_base)
1316 {
1317         double base_time = time == AV_NOPTS_VALUE ? 0 :
1318                 av_rescale_q(time, time_base, AV_TIME_BASE_Q);
1319         return base_time / AV_TIME_BASE;
1320 }
1321
1322 int FFMPEG::info(char *text, int len)
1323 {
1324         if( len <= 0 ) return 0;
1325         decode_activate();
1326 #define report(s...) do { int n = snprintf(cp,len,s); cp += n;  len -= n; } while(0)
1327         char *cp = text;
1328         if( ffvideo.size() > 0 )
1329                 report("\n%d video stream%s\n",ffvideo.size(), ffvideo.size()!=1 ? "s" : "");
1330         for( int vidx=0; vidx<ffvideo.size(); ++vidx ) {
1331                 FFVideoStream *vid = ffvideo[vidx];
1332                 AVStream *st = vid->st;
1333                 AVCodecContext *avctx = st->codec;
1334                 report(_("vid%d (%d),  id 0x%06x:\n"), vid->idx, vid->fidx, avctx->codec_id);
1335                 const AVCodecDescriptor *desc = avcodec_descriptor_get(avctx->codec_id);
1336                 report("  video%d %s", vidx+1, desc ? desc->name : " (unkn)");
1337                 report(" %dx%d %5.2f", vid->width, vid->height, vid->frame_rate);
1338                 const char *pfn = av_get_pix_fmt_name(avctx->pix_fmt);
1339                 report(" pix %s\n", pfn ? pfn : "(unkn)");
1340                 double secs = to_secs(st->duration, st->time_base);
1341                 int64_t length = secs * vid->frame_rate + 0.5;
1342                 double ofs = to_secs((vid->nudge - st->start_time), st->time_base);
1343                 int64_t nudge = ofs * vid->frame_rate;
1344                 int ch = nudge >= 0 ? '+' : (nudge=-nudge, '-');
1345                 report("    %jd%c%jd frms %0.2f secs", length,ch,nudge, secs);
1346                 int hrs = secs/3600;  secs -= hrs*3600;
1347                 int mins = secs/60;  secs -= mins*60;
1348                 report("  %d:%02d:%05.2f\n", hrs, mins, secs);
1349         }
1350         if( ffaudio.size() > 0 )
1351                 report("\n%d audio stream%s\n",ffaudio.size(), ffaudio.size()!=1 ? "s" : "");
1352         for( int aidx=0; aidx<ffaudio.size(); ++aidx ) {
1353                 FFAudioStream *aud = ffaudio[aidx];
1354                 AVStream *st = aud->st;
1355                 AVCodecContext *avctx = st->codec;
1356                 report(_("aud%d (%d),  id 0x%06x:\n"), aud->idx, aud->fidx, avctx->codec_id);
1357                 const AVCodecDescriptor *desc = avcodec_descriptor_get(avctx->codec_id);
1358                 int nch = aud->channels, ch0 = aud->channel0+1;
1359                 report("  audio%d-%d %s", ch0, ch0+nch-1, desc ? desc->name : " (unkn)");
1360                 const char *fmt = av_get_sample_fmt_name(avctx->sample_fmt);
1361                 report(" %s %d", fmt, aud->sample_rate);
1362                 int sample_bits = av_get_bits_per_sample(avctx->codec_id);
1363                 report(" %dbits\n", sample_bits);
1364                 double secs = to_secs(st->duration, st->time_base);
1365                 int64_t length = secs * aud->sample_rate + 0.5;
1366                 double ofs = to_secs((aud->nudge - st->start_time), st->time_base);
1367                 int64_t nudge = ofs * aud->sample_rate;
1368                 int ch = nudge >= 0 ? '+' : (nudge=-nudge, '-');
1369                 report("    %jd%c%jd smpl %0.2f secs", length,ch,nudge, secs);
1370                 int hrs = secs/3600;  secs -= hrs*3600;
1371                 int mins = secs/60;  secs -= mins*60;
1372                 report("  %d:%02d:%05.2f\n", hrs, mins, secs);
1373         }
1374         if( fmt_ctx->nb_programs > 0 )
1375                 report("\n%d program%s\n",fmt_ctx->nb_programs, fmt_ctx->nb_programs!=1 ? "s" : "");
1376         for( int i=0; i<(int)fmt_ctx->nb_programs; ++i ) {
1377                 report("program %d", i+1);
1378                 AVProgram *pgrm = fmt_ctx->programs[i];
1379                 for( int j=0; j<(int)pgrm->nb_stream_indexes; ++j ) {
1380                         int idx = pgrm->stream_index[j];
1381                         int vidx = ffvideo.size();
1382                         while( --vidx>=0 && ffvideo[vidx]->fidx != idx );
1383                         if( vidx >= 0 ) {
1384                                 report(", vid%d", vidx);
1385                                 continue;
1386                         }
1387                         int aidx = ffaudio.size();
1388                         while( --aidx>=0 && ffaudio[aidx]->fidx != idx );
1389                         if( aidx >= 0 ) {
1390                                 report(", aud%d", aidx);
1391                                 continue;
1392                         }
1393                         report(", (%d)", pgrm->stream_index[j]);
1394                 }
1395                 report("\n");
1396         }
1397         report("\n");
1398         AVDictionaryEntry *tag = 0;
1399         while ((tag = av_dict_get(fmt_ctx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
1400                 report("%s=%s\n", tag->key, tag->value);
1401
1402         if( !len ) --cp;
1403         *cp = 0;
1404         return cp - text;
1405 #undef report
1406 }
1407
1408
1409 int FFMPEG::init_decoder(const char *filename)
1410 {
1411         ff_lock("FFMPEG::init_decoder");
1412         av_register_all();
1413         char file_opts[BCTEXTLEN];
1414         char *bp = strrchr(strcpy(file_opts, filename), '/');
1415         char *sp = strrchr(!bp ? file_opts : bp, '.');
1416         FILE *fp = 0;
1417         if( sp ) {
1418                 strcpy(sp, ".opts");
1419                 fp = fopen(file_opts, "r");
1420         }
1421         if( fp ) {
1422                 read_options(fp, file_opts, opts);
1423                 fclose(fp);
1424         }
1425         else
1426                 load_options("decode.opts", opts);
1427         AVDictionary *fopts = 0;
1428         av_dict_copy(&fopts, opts, 0);
1429         int ret = avformat_open_input(&fmt_ctx, filename, NULL, &fopts);
1430         av_dict_free(&fopts);
1431         if( ret >= 0 )
1432                 ret = avformat_find_stream_info(fmt_ctx, NULL);
1433         if( !ret ) {
1434                 decoding = -1;
1435         }
1436         ff_unlock();
1437         return !ret ? 0 : 1;
1438 }
1439
1440 int FFMPEG::open_decoder()
1441 {
1442         struct stat st;
1443         if( stat(fmt_ctx->filename, &st) < 0 ) {
1444                 eprintf("FFMPEG::open_decoder: can't stat file: %s\n",
1445                         fmt_ctx->filename);
1446                 return 1;
1447         }
1448
1449         int64_t file_bits = 8 * st.st_size;
1450         if( !fmt_ctx->bit_rate && opt_duration > 0 )
1451                 fmt_ctx->bit_rate = file_bits / opt_duration;
1452
1453         int estimated = 0;
1454         if( fmt_ctx->bit_rate > 0 ) {
1455                 for( int i=0; i<(int)fmt_ctx->nb_streams; ++i ) {
1456                         AVStream *st = fmt_ctx->streams[i];
1457                         if( st->duration != AV_NOPTS_VALUE ) continue;
1458                         if( st->time_base.num > INT64_MAX / fmt_ctx->bit_rate ) continue;
1459                         st->duration = av_rescale(file_bits, st->time_base.den,
1460                                 fmt_ctx->bit_rate * (int64_t) st->time_base.num);
1461                         estimated = 1;
1462                 }
1463         }
1464         if( estimated )
1465                 printf("FFMPEG::open_decoder: some stream times estimated\n");
1466
1467         ff_lock("FFMPEG::open_decoder");
1468         int bad_time = 0;
1469         for( int i=0; i<(int)fmt_ctx->nb_streams; ++i ) {
1470                 AVStream *st = fmt_ctx->streams[i];
1471                 if( st->duration == AV_NOPTS_VALUE ) bad_time = 1;
1472                 AVCodecContext *avctx = st->codec;
1473                 const AVCodecDescriptor *codec_desc = avcodec_descriptor_get(avctx->codec_id);
1474                 if( !codec_desc ) continue;
1475                 if( avctx->codec_type == AVMEDIA_TYPE_VIDEO ) {
1476                         if( avctx->width < 1 ) continue;
1477                         if( avctx->height < 1 ) continue;
1478                         AVRational framerate = av_guess_frame_rate(fmt_ctx, st, 0);
1479                         if( framerate.num < 1 ) continue;
1480                         has_video = 1;
1481                         int vidx = ffvideo.size();
1482                         FFVideoStream *vid = new FFVideoStream(this, st, vidx, i);
1483                         vstrm_index.append(ffidx(vidx, 0));
1484                         ffvideo.append(vid);
1485                         vid->width = avctx->width;
1486                         vid->height = avctx->height;
1487                         vid->frame_rate = !framerate.den ? 0 : (double)framerate.num / framerate.den;
1488                         double secs = to_secs(st->duration, st->time_base);
1489                         vid->length = secs * vid->frame_rate;
1490                         vid->aspect_ratio = (double)st->sample_aspect_ratio.num / st->sample_aspect_ratio.den;
1491                         vid->nudge = st->start_time;
1492                         vid->reading = -1;
1493                         if( opt_video_filter )
1494                                 vid->create_filter(opt_video_filter, avctx,avctx);
1495                 }
1496                 else if( avctx->codec_type == AVMEDIA_TYPE_AUDIO ) {
1497                         if( avctx->channels < 1 ) continue;
1498                         if( avctx->sample_rate < 1 ) continue;
1499                         has_audio = 1;
1500                         int aidx = ffaudio.size();
1501                         FFAudioStream *aud = new FFAudioStream(this, st, aidx, i);
1502                         ffaudio.append(aud);
1503                         aud->channel0 = astrm_index.size();
1504                         aud->channels = avctx->channels;
1505                         for( int ch=0; ch<aud->channels; ++ch )
1506                                 astrm_index.append(ffidx(aidx, ch));
1507                         aud->sample_rate = avctx->sample_rate;
1508                         double secs = to_secs(st->duration, st->time_base);
1509                         aud->length = secs * aud->sample_rate;
1510                         if( avctx->sample_fmt != AV_SAMPLE_FMT_FLT ) {
1511                                 uint64_t layout = av_get_default_channel_layout(avctx->channels);
1512                                 if( !layout ) layout = ((uint64_t)1<<aud->channels) - 1;
1513                                 aud->resample_context = swr_alloc_set_opts(NULL,
1514                                         layout, AV_SAMPLE_FMT_FLT, avctx->sample_rate,
1515                                         layout, avctx->sample_fmt, avctx->sample_rate,
1516                                         0, NULL);
1517                                 swr_init(aud->resample_context);
1518                         }
1519                         aud->nudge = st->start_time;
1520                         aud->reading = -1;
1521                         if( opt_audio_filter )
1522                                 aud->create_filter(opt_audio_filter, avctx,avctx);
1523                 }
1524         }
1525         if( bad_time )
1526                 printf("FFMPEG::open_decoder: some stream have bad times\n");
1527         ff_unlock();
1528         return 0;
1529 }
1530
1531
1532 int FFMPEG::init_encoder(const char *filename)
1533 {
1534         int fd = ::open(filename,O_WRONLY);
1535         if( fd < 0 ) fd = open(filename,O_WRONLY+O_CREAT,0666);
1536         if( fd < 0 ) {
1537                 eprintf("FFMPEG::init_encoder: bad file path: %s\n", filename);
1538                 return 1;
1539         }
1540         ::close(fd);
1541         int ret = get_file_format();
1542         if( ret > 0 ) {
1543                 eprintf("FFMPEG::init_encoder: bad file format: %s\n", filename);
1544                 return 1;
1545         }
1546         if( ret < 0 ) {
1547                 eprintf("FFMPEG::init_encoder: mismatch audio/video file format: %s\n", filename);
1548                 return 1;
1549         }
1550         ff_lock("FFMPEG::init_encoder");
1551         av_register_all();
1552         avformat_alloc_output_context2(&fmt_ctx, 0, file_format, filename);
1553         if( !fmt_ctx ) {
1554                 eprintf("FFMPEG::init_encoder: failed: %s\n", filename);
1555                 ret = 1;
1556         }
1557         if( !ret ) {
1558                 encoding = -1;
1559                 load_options("encode.opts", opts);
1560         }
1561         ff_unlock();
1562         start_muxer();
1563         return ret;
1564 }
1565
1566 int FFMPEG::open_encoder(const char *type, const char *spec)
1567 {
1568
1569         Asset *asset = file_base->asset;
1570         char *filename = asset->path;
1571         AVDictionary *sopts = 0;
1572         av_dict_copy(&sopts, opts, 0);
1573         char option_path[BCTEXTLEN];
1574         set_option_path(option_path, "%s/%s.opts", type, type);
1575         read_options(option_path, sopts);
1576         get_option_path(option_path, type, spec);
1577         char format_name[BCSTRLEN], codec_name[BCTEXTLEN];
1578         char bsfilter[BCSTRLEN], bsargs[BCTEXTLEN];
1579         if( get_encoder(option_path, format_name, codec_name, bsfilter, bsargs) ) {
1580                 eprintf("FFMPEG::open_encoder: get_encoder failed %s:%s\n",
1581                         option_path, filename);
1582                 return 1;
1583         }
1584
1585         if( !strcmp(codec_name, CODEC_TAG_DVSD) ) strcpy(codec_name, "dv");
1586         else if( !strcmp(codec_name, CODEC_TAG_MJPEG) ) strcpy(codec_name, "mjpeg");
1587         else if( !strcmp(codec_name, CODEC_TAG_JPEG) ) strcpy(codec_name, "jpeg");
1588
1589         int ret = 0;
1590         ff_lock("FFMPEG::open_encoder");
1591         FFStream *fst = 0;
1592         AVStream *st = 0;
1593
1594         const AVCodecDescriptor *codec_desc = 0;
1595         AVCodec *codec = avcodec_find_encoder_by_name(codec_name);
1596         if( !codec ) {
1597                 eprintf("FFMPEG::open_encoder: cant find codec %s:%s\n",
1598                         codec_name, filename);
1599                 ret = 1;
1600         }
1601         if( !ret ) {
1602                 codec_desc = avcodec_descriptor_get(codec->id);
1603                 if( !codec_desc ) {
1604                         eprintf("FFMPEG::open_encoder: unknown codec %s:%s\n",
1605                                 codec_name, filename);
1606                         ret = 1;
1607                 }
1608         }
1609         if( !ret ) {
1610                 st = avformat_new_stream(fmt_ctx, 0);
1611                 if( !st ) {
1612                         eprintf("FFMPEG::open_encoder: cant create stream %s:%s\n",
1613                                 codec_name, filename);
1614                         ret = 1;
1615                 }
1616         }
1617         if( !ret ) {
1618                 AVCodecContext *ctx = st->codec;
1619                 switch( codec_desc->type ) {
1620                 case AVMEDIA_TYPE_AUDIO: {
1621                         if( has_audio ) {
1622                                 eprintf("FFMPEG::open_encoder: duplicate audio %s:%s\n",
1623                                         codec_name, filename);
1624                                 ret = 1;
1625                                 break;
1626                         }
1627                         has_audio = 1;
1628                         if( scan_options(asset->ff_audio_options, sopts, st) ) {
1629                                 eprintf("FFMPEG::open_encoder: bad audio options %s:%s\n",
1630                                         codec_name, filename);
1631                                 ret = 1;
1632                                 break;
1633                         }
1634                         if( asset->ff_audio_bitrate > 0 ) {
1635                                 ctx->bit_rate = asset->ff_audio_bitrate;
1636                                 char arg[BCSTRLEN];
1637                                 sprintf(arg, "%d", asset->ff_audio_bitrate);
1638                                 av_dict_set(&sopts, "b", arg, 0);
1639                         }
1640                         int aidx = ffaudio.size();
1641                         int fidx = aidx + ffvideo.size();
1642                         FFAudioStream *aud = new FFAudioStream(this, st, aidx, fidx);
1643                         ffaudio.append(aud);  fst = aud;
1644                         aud->sample_rate = asset->sample_rate;
1645                         ctx->channels = aud->channels = asset->channels;
1646                         for( int ch=0; ch<aud->channels; ++ch )
1647                                 astrm_index.append(ffidx(aidx, ch));
1648                         ctx->channel_layout =  av_get_default_channel_layout(ctx->channels);
1649                         ctx->sample_rate = check_sample_rate(codec, asset->sample_rate);
1650                         if( !ctx->sample_rate ) {
1651                                 eprintf("FFMPEG::open_audio_encode:"
1652                                         " check_sample_rate failed %s\n", filename);
1653                                 ret = 1;
1654                                 break;
1655                         }
1656                         ctx->time_base = st->time_base = (AVRational){1, aud->sample_rate};
1657                         ctx->sample_fmt = codec->sample_fmts[0];
1658                         uint64_t layout = av_get_default_channel_layout(ctx->channels);
1659                         aud->resample_context = swr_alloc_set_opts(NULL,
1660                                 layout, ctx->sample_fmt, aud->sample_rate,
1661                                 layout, AV_SAMPLE_FMT_FLT, ctx->sample_rate,
1662                                 0, NULL);
1663                         swr_init(aud->resample_context);
1664                         aud->writing = -1;
1665                         break; }
1666                 case AVMEDIA_TYPE_VIDEO: {
1667                         if( has_video ) {
1668                                 eprintf("FFMPEG::open_encoder: duplicate video %s:%s\n",
1669                                         codec_name, filename);
1670                                 ret = 1;
1671                                 break;
1672                         }
1673                         has_video = 1;
1674                         if( scan_options(asset->ff_video_options, sopts, st) ) {
1675                                 eprintf("FFMPEG::open_encoder: bad video options %s:%s\n",
1676                                         codec_name, filename);
1677                                 ret = 1;
1678                                 break;
1679                         }
1680                         if( asset->ff_video_bitrate > 0 ) {
1681                                 ctx->bit_rate = asset->ff_video_bitrate;
1682                                 char arg[BCSTRLEN];
1683                                 sprintf(arg, "%d", asset->ff_video_bitrate);
1684                                 av_dict_set(&sopts, "b", arg, 0);
1685                         }
1686                         else if( asset->ff_video_quality > 0 ) {
1687                                 ctx->global_quality = asset->ff_video_quality * FF_QP2LAMBDA;
1688                                 ctx->qmin    = ctx->qmax =  asset->ff_video_quality;
1689                                 ctx->mb_lmin = ctx->qmin * FF_QP2LAMBDA;
1690                                 ctx->mb_lmax = ctx->qmax * FF_QP2LAMBDA;
1691                                 ctx->flags |= CODEC_FLAG_QSCALE;
1692                                 char arg[BCSTRLEN];
1693                                 av_dict_set(&sopts, "flags", "+qscale", 0);
1694                                 sprintf(arg, "%d", asset->ff_video_quality);
1695                                 av_dict_set(&sopts, "qscale", arg, 0);
1696                                 sprintf(arg, "%d", ctx->global_quality);
1697                                 av_dict_set(&sopts, "global_quality", arg, 0);
1698                         }
1699                         int vidx = ffvideo.size();
1700                         int fidx = vidx + ffaudio.size();
1701                         FFVideoStream *vid = new FFVideoStream(this, st, vidx, fidx);
1702                         vstrm_index.append(ffidx(vidx, 0));
1703                         ffvideo.append(vid);  fst = vid;
1704                         vid->width = asset->width;
1705                         ctx->width = (vid->width+3) & ~3;
1706                         vid->height = asset->height;
1707                         ctx->height = (vid->height+3) & ~3;
1708                         vid->frame_rate = asset->frame_rate;
1709                         ctx->sample_aspect_ratio = to_sample_aspect_ratio(asset);
1710                         ctx->pix_fmt = codec->pix_fmts ? codec->pix_fmts[0] : AV_PIX_FMT_YUV420P;
1711                         AVRational frame_rate = check_frame_rate(codec, vid->frame_rate);
1712                         if( !frame_rate.num || !frame_rate.den ) {
1713                                 eprintf("FFMPEG::open_audio_encode:"
1714                                         " check_frame_rate failed %s\n", filename);
1715                                 ret = 1;
1716                                 break;
1717                         }
1718                         ctx->time_base = (AVRational) { frame_rate.den, frame_rate.num };
1719                         st->time_base = ctx->time_base;
1720                         vid->writing = -1;
1721                         break; }
1722                 default:
1723                         eprintf("FFMPEG::open_encoder: not audio/video, %s:%s\n",
1724                                 codec_name, filename);
1725                         ret = 1;
1726                 }
1727         }
1728         if( !ret ) {
1729                 if( fmt_ctx->oformat->flags & AVFMT_GLOBALHEADER )
1730                         st->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
1731
1732                 ret = avcodec_open2(st->codec, codec, &sopts);
1733                 if( ret < 0 ) {
1734                         ff_err(ret,"FFMPEG::open_encoder");
1735                         eprintf("FFMPEG::open_encoder: open failed %s:%s\n",
1736                                 codec_name, filename);
1737                         ret = 1;
1738                 }
1739                 else
1740                         ret = 0;
1741         }
1742         if( !ret ) {
1743                 if( fst && bsfilter[0] )
1744                         fst->add_bsfilter(bsfilter, !bsargs[0] ? 0 : bsargs);
1745         }
1746
1747         ff_unlock();
1748         av_dict_free(&sopts);
1749         return ret;
1750 }
1751
1752 int FFMPEG::close_encoder()
1753 {
1754         stop_muxer();
1755         if( encoding > 0 ) {
1756                 av_write_trailer(fmt_ctx);
1757                 if( !(fmt_ctx->flags & AVFMT_NOFILE) )
1758                         avio_closep(&fmt_ctx->pb);
1759         }
1760         encoding = 0;
1761         return 0;
1762 }
1763
1764 int FFMPEG::decode_activate()
1765 {
1766         if( decoding < 0 ) {
1767                 decoding = 0;
1768                 for( int vidx=0; vidx<ffvideo.size(); ++vidx )
1769                         ffvideo[vidx]->nudge = AV_NOPTS_VALUE;
1770                 for( int aidx=0; aidx<ffaudio.size(); ++aidx )
1771                         ffaudio[aidx]->nudge = AV_NOPTS_VALUE;
1772                 // set nudges for each program stream set
1773                 int npgrms = fmt_ctx->nb_programs;
1774                 for( int i=0; i<npgrms; ++i ) {
1775                         AVProgram *pgrm = fmt_ctx->programs[i];
1776                         // first start time video stream
1777                         int64_t vstart_time = -1, astart_time = -1;
1778                         for( int j=0; j<(int)pgrm->nb_stream_indexes; ++j ) {
1779                                 int fidx = pgrm->stream_index[j];
1780                                 AVStream *st = fmt_ctx->streams[fidx];
1781                                 AVCodecContext *avctx = st->codec;
1782                                 if( avctx->codec_type == AVMEDIA_TYPE_VIDEO ) {
1783                                         if( st->start_time == AV_NOPTS_VALUE ) continue;
1784                                         if( vstart_time > st->start_time ) continue;
1785                                         vstart_time = st->start_time;
1786                                         continue;
1787                                 }
1788                                 if( avctx->codec_type == AVMEDIA_TYPE_VIDEO ) {
1789                                         if( st->start_time == AV_NOPTS_VALUE ) continue;
1790                                         if( astart_time > st->start_time ) continue;
1791                                         astart_time = st->start_time;
1792                                         continue;
1793                                 }
1794                         }
1795                         // match program streams to max start_time
1796                         int64_t nudge = vstart_time > astart_time ? vstart_time : astart_time;
1797                         for( int j=0; j<(int)pgrm->nb_stream_indexes; ++j ) {
1798                                 int fidx = pgrm->stream_index[j];
1799                                 AVStream *st = fmt_ctx->streams[fidx];
1800                                 AVCodecContext *avctx = st->codec;
1801                                 if( avctx->codec_type == AVMEDIA_TYPE_VIDEO ) {
1802                                         for( int k=0; k<ffvideo.size(); ++k ) {
1803                                                 if( ffvideo[k]->fidx != fidx ) continue;
1804                                                 ffvideo[k]->nudge = nudge;
1805                                         }
1806                                         continue;
1807                                 }
1808                                 if( avctx->codec_type == AVMEDIA_TYPE_AUDIO ) {
1809                                         for( int k=0; k<ffaudio.size(); ++k ) {
1810                                                 if( ffaudio[k]->fidx != fidx ) continue;
1811                                                 ffaudio[k]->nudge = nudge;
1812                                         }
1813                                         continue;
1814                                 }
1815                         }
1816                 }
1817                 // set nudges for any streams not yet set
1818                 int64_t vstart_time = 0, astart_time = 0;
1819                 int nstreams = fmt_ctx->nb_streams;
1820                 for( int i=0; i<nstreams; ++i ) {
1821                         AVStream *st = fmt_ctx->streams[i];
1822                         AVCodecContext *avctx = st->codec;
1823                         switch( avctx->codec_type ) {
1824                         case AVMEDIA_TYPE_VIDEO: {
1825                                 if( st->start_time == AV_NOPTS_VALUE ) continue;
1826                                 int vidx = ffvideo.size();
1827                                 while( --vidx >= 0 && ffvideo[vidx]->fidx != i );
1828                                 if( vidx >= 0 && ffvideo[vidx]->nudge != AV_NOPTS_VALUE ) continue;
1829                                 if( vstart_time >= st->start_time ) continue;
1830                                 vstart_time = st->start_time;
1831                                 break; }
1832                         case AVMEDIA_TYPE_AUDIO: {
1833                                 if( st->start_time == AV_NOPTS_VALUE ) continue;
1834                                 int aidx = ffaudio.size();
1835                                 while( --aidx >= 0 && ffaudio[aidx]->fidx != i );
1836                                 if( aidx >= 0 && ffaudio[aidx]->nudge != AV_NOPTS_VALUE ) continue;
1837                                 if( astart_time >= st->start_time ) continue;
1838                                 astart_time = st->start_time;
1839                                 break; }
1840                         default: break;
1841                         }
1842                 }
1843                 int64_t nudge = vstart_time > astart_time ? vstart_time : astart_time;
1844                 for( int vidx=0; vidx<ffvideo.size(); ++vidx ) {
1845                         if( ffvideo[vidx]->nudge != AV_NOPTS_VALUE ) continue;
1846                         ffvideo[vidx]->nudge = nudge;
1847                 }
1848                 for( int aidx=0; aidx<ffaudio.size(); ++aidx ) {
1849                         if( ffaudio[aidx]->nudge != AV_NOPTS_VALUE ) continue;
1850                         ffaudio[aidx]->nudge = nudge;
1851                 }
1852                 decoding = 1;
1853         }
1854         return decoding;
1855 }
1856
1857 int FFMPEG::encode_activate()
1858 {
1859         int ret = 0;
1860         if( encoding < 0 ) {
1861                 encoding = 0;
1862                 if( !(fmt_ctx->flags & AVFMT_NOFILE) &&
1863                     (ret=avio_open(&fmt_ctx->pb, fmt_ctx->filename, AVIO_FLAG_WRITE)) < 0 ) {
1864                         ff_err(ret, "FFMPEG::encode_activate: err opening : %s\n",
1865                                 fmt_ctx->filename);
1866                         return 1;
1867                 }
1868
1869                 AVDictionary *fopts = 0;
1870                 char option_path[BCTEXTLEN];
1871                 set_option_path(option_path, "format/%s", file_format);
1872                 read_options(option_path, fopts);
1873                 ret = avformat_write_header(fmt_ctx, &fopts);
1874                 av_dict_free(&fopts);
1875                 if( ret < 0 ) {
1876                         ff_err(ret, "FFMPEG::encode_activate: write header failed %s\n",
1877                                 fmt_ctx->filename);
1878                         return 1;
1879                 }
1880                 encoding = 1;
1881         }
1882         return encoding;
1883 }
1884
1885
1886 int FFMPEG::audio_seek(int stream, int64_t pos)
1887 {
1888         int aidx = astrm_index[stream].st_idx;
1889         FFAudioStream *aud = ffaudio[aidx];
1890         aud->audio_seek(pos);
1891         return 0;
1892 }
1893
1894 int FFMPEG::video_seek(int stream, int64_t pos)
1895 {
1896         int vidx = vstrm_index[stream].st_idx;
1897         FFVideoStream *vid = ffvideo[vidx];
1898         vid->video_seek(pos);
1899         return 0;
1900 }
1901
1902
1903 int FFMPEG::decode(int chn, int64_t pos, double *samples, int len)
1904 {
1905         if( !has_audio || chn >= astrm_index.size() ) return -1;
1906         int aidx = astrm_index[chn].st_idx;
1907         FFAudioStream *aud = ffaudio[aidx];
1908         if( aud->load(pos, len) < len ) return -1;
1909         int ch = astrm_index[chn].st_ch;
1910         int ret = aud->read(samples,len,ch);
1911         return ret;
1912 }
1913
1914 int FFMPEG::decode(int layer, int64_t pos, VFrame *vframe)
1915 {
1916         if( !has_video || layer >= vstrm_index.size() ) return -1;
1917         int vidx = vstrm_index[layer].st_idx;
1918         FFVideoStream *vid = ffvideo[vidx];
1919         return vid->load(vframe, pos);
1920 }
1921
1922
1923 int FFMPEG::encode(int stream, double **samples, int len)
1924 {
1925         FFAudioStream *aud = ffaudio[stream];
1926         return aud->encode(samples, len);
1927 }
1928
1929
1930 int FFMPEG::encode(int stream, VFrame *frame)
1931 {
1932         FFVideoStream *vid = ffvideo[stream];
1933         return vid->encode(frame);
1934 }
1935
1936 void FFMPEG::start_muxer()
1937 {
1938         if( !running() ) {
1939                 done = 0;
1940                 start();
1941         }
1942 }
1943
1944 void FFMPEG::stop_muxer()
1945 {
1946         if( running() ) {
1947                 done = 1;
1948                 mux_lock->unlock();
1949                 join();
1950         }
1951 }
1952
1953 void FFMPEG::flow_off()
1954 {
1955         if( !flow ) return;
1956         flow_lock->lock("FFMPEG::flow_off");
1957         flow = 0;
1958 }
1959
1960 void FFMPEG::flow_on()
1961 {
1962         if( flow ) return;
1963         flow = 1;
1964         flow_lock->unlock();
1965 }
1966
1967 void FFMPEG::flow_ctl()
1968 {
1969         while( !flow ) {
1970                 flow_lock->lock("FFMPEG::flow_ctl");
1971                 flow_lock->unlock();
1972         }
1973 }
1974
1975 int FFMPEG::mux_audio(FFrame *frm)
1976 {
1977         FFPacket pkt;
1978         FFStream *fst = frm->fst;
1979         AVCodecContext *ctx = fst->st->codec;
1980         AVFrame *frame = *frm;
1981         AVRational tick_rate = {1, ctx->sample_rate};
1982         frame->pts = av_rescale_q(frm->position, tick_rate, ctx->time_base);
1983         int got_packet = 0;
1984         int ret = fst->encode_frame(pkt, frame, got_packet);
1985         if( ret >= 0 && got_packet )
1986                 ret = fst->write_packet(pkt);
1987         if( ret < 0 )
1988                 ff_err(ret, "FFMPEG::mux_audio");
1989         return ret >= 0 ? 0 : 1;
1990 }
1991
1992 int FFMPEG::mux_video(FFrame *frm)
1993 {
1994         FFPacket pkt;
1995         FFStream *fst = frm->fst;
1996         AVFrame *frame = *frm;
1997         frame->pts = frm->position;
1998         int ret = 1, got_packet = 0;
1999         if( fmt_ctx->oformat->flags & AVFMT_RAWPICTURE ) {
2000                 /* a hack to avoid data copy with some raw video muxers */
2001                 pkt->flags |= AV_PKT_FLAG_KEY;
2002                 pkt->stream_index  = fst->st->index;
2003                 AVPicture *picture = (AVPicture *)frame;
2004                 pkt->data = (uint8_t *)picture;
2005                 pkt->size = sizeof(AVPicture);
2006                 pkt->pts = pkt->dts = frame->pts;
2007                 got_packet = 1;
2008         }
2009         else
2010                 ret = fst->encode_frame(pkt, frame, got_packet);
2011         if( ret >= 0 && got_packet )
2012                 ret = fst->write_packet(pkt);
2013         if( ret < 0 )
2014                 ff_err(ret, "FFMPEG::mux_video");
2015         return ret >= 0 ? 0 : 1;
2016 }
2017
2018 void FFMPEG::mux()
2019 {
2020         for(;;) {
2021                 double atm = -1, vtm = -1;
2022                 FFrame *afrm = 0, *vfrm = 0;
2023                 int demand = 0;
2024                 for( int i=0; i<ffaudio.size(); ++i ) {  // earliest audio
2025                         FFStream *fst = ffaudio[i];
2026                         if( fst->frm_count < 3 ) { demand = 1; flow_on(); }
2027                         FFrame *frm = fst->frms.first;
2028                         if( !frm ) { if( !done ) return; continue; }
2029                         double tm = to_secs(frm->position, fst->st->codec->time_base);
2030                         if( atm < 0 || tm < atm ) { atm = tm;  afrm = frm; }
2031                 }
2032                 for( int i=0; i<ffvideo.size(); ++i ) {  // earliest video
2033                         FFStream *fst = ffvideo[i];
2034                         if( fst->frm_count < 2 ) { demand = 1; flow_on(); }
2035                         FFrame *frm = fst->frms.first;
2036                         if( !frm ) { if( !done ) return; continue; }
2037                         double tm = to_secs(frm->position, fst->st->codec->time_base);
2038                         if( vtm < 0 || tm < vtm ) { vtm = tm;  vfrm = frm; }
2039                 }
2040                 if( !demand ) flow_off();
2041                 if( !afrm && !vfrm ) break;
2042                 int v = !afrm ? -1 : !vfrm ? 1 : av_compare_ts(
2043                         vfrm->position, vfrm->fst->st->codec->time_base,
2044                         afrm->position, afrm->fst->st->codec->time_base);
2045                 FFrame *frm = v <= 0 ? vfrm : afrm;
2046                 if( frm == afrm ) mux_audio(frm);
2047                 if( frm == vfrm ) mux_video(frm);
2048                 frm->dequeue();
2049                 delete frm;
2050         }
2051 }
2052
2053 void FFMPEG::run()
2054 {
2055         while( !done ) {
2056                 mux_lock->lock("FFMPEG::run");
2057                 if( !done ) mux();
2058         }
2059         mux();
2060         for( int i=0; i<ffaudio.size(); ++i )
2061                 ffaudio[i]->flush();
2062         for( int i=0; i<ffvideo.size(); ++i )
2063                 ffvideo[i]->flush();
2064 }
2065
2066
2067 int FFMPEG::ff_total_audio_channels()
2068 {
2069         return astrm_index.size();
2070 }
2071
2072 int FFMPEG::ff_total_astreams()
2073 {
2074         return ffaudio.size();
2075 }
2076
2077 int FFMPEG::ff_audio_channels(int stream)
2078 {
2079         return ffaudio[stream]->channels;
2080 }
2081
2082 int FFMPEG::ff_sample_rate(int stream)
2083 {
2084         return ffaudio[stream]->sample_rate;
2085 }
2086
2087 const char* FFMPEG::ff_audio_format(int stream)
2088 {
2089         AVStream *st = ffaudio[stream]->st;
2090         AVCodecID id = st->codec->codec_id;
2091         const AVCodecDescriptor *desc = avcodec_descriptor_get(id);
2092         return desc ? desc->name : "Unknown";
2093 }
2094
2095 int FFMPEG::ff_audio_pid(int stream)
2096 {
2097         return ffaudio[stream]->st->id;
2098 }
2099
2100 int64_t FFMPEG::ff_audio_samples(int stream)
2101 {
2102         return ffaudio[stream]->length;
2103 }
2104
2105 // find audio astream/channels with this program,
2106 //   or all program audio channels (astream=-1)
2107 int FFMPEG::ff_audio_for_video(int vstream, int astream, int64_t &channel_mask)
2108 {
2109         channel_mask = 0;
2110         int pidx = -1;
2111         int vidx = ffvideo[vstream]->fidx;
2112         // find first program with this video stream
2113         for( int i=0; pidx<0 && i<(int)fmt_ctx->nb_programs; ++i ) {
2114                 AVProgram *pgrm = fmt_ctx->programs[i];
2115                 for( int j=0;  pidx<0 && j<(int)pgrm->nb_stream_indexes; ++j ) {
2116                         int st_idx = pgrm->stream_index[j];
2117                         AVStream *st = fmt_ctx->streams[st_idx];
2118                         if( st->codec->codec_type != AVMEDIA_TYPE_VIDEO ) continue;
2119                         if( st_idx == vidx ) pidx = i;
2120                 }
2121         }
2122         if( pidx < 0 ) return -1;
2123         int ret = -1;
2124         int64_t channels = 0;
2125         AVProgram *pgrm = fmt_ctx->programs[pidx];
2126         for( int j=0; j<(int)pgrm->nb_stream_indexes; ++j ) {
2127                 int aidx = pgrm->stream_index[j];
2128                 AVStream *st = fmt_ctx->streams[aidx];
2129                 if( st->codec->codec_type != AVMEDIA_TYPE_AUDIO ) continue;
2130                 if( astream > 0 ) { --astream;  continue; }
2131                 int astrm = -1;
2132                 for( int i=0; astrm<0 && i<ffaudio.size(); ++i )
2133                         if( ffaudio[i]->fidx == aidx ) astrm = i;
2134                 if( astrm >= 0 ) {
2135                         if( ret < 0 ) ret = astrm;
2136                         int64_t mask = (1 << ffaudio[astrm]->channels) - 1;
2137                         channels |= mask << ffaudio[astrm]->channel0;
2138                 }
2139                 if( !astream ) break;
2140         }
2141         channel_mask = channels;
2142         return ret;
2143 }
2144
2145
2146 int FFMPEG::ff_total_video_layers()
2147 {
2148         return vstrm_index.size();
2149 }
2150
2151 int FFMPEG::ff_total_vstreams()
2152 {
2153         return ffvideo.size();
2154 }
2155
2156 int FFMPEG::ff_video_width(int stream)
2157 {
2158         return ffvideo[stream]->width;
2159 }
2160
2161 int FFMPEG::ff_video_height(int stream)
2162 {
2163         return ffvideo[stream]->height;
2164 }
2165
2166 int FFMPEG::ff_set_video_width(int stream, int width)
2167 {
2168         int w = ffvideo[stream]->width;
2169         ffvideo[stream]->width = width;
2170         return w;
2171 }
2172
2173 int FFMPEG::ff_set_video_height(int stream, int height)
2174 {
2175         int h = ffvideo[stream]->height;
2176         ffvideo[stream]->height = height;
2177         return h;
2178 }
2179
2180 int FFMPEG::ff_coded_width(int stream)
2181 {
2182         AVStream *st = ffvideo[stream]->st;
2183         return st->codec->coded_width;
2184 }
2185
2186 int FFMPEG::ff_coded_height(int stream)
2187 {
2188         AVStream *st = ffvideo[stream]->st;
2189         return st->codec->coded_height;
2190 }
2191
2192 float FFMPEG::ff_aspect_ratio(int stream)
2193 {
2194         return ffvideo[stream]->aspect_ratio;
2195 }
2196
2197 const char* FFMPEG::ff_video_format(int stream)
2198 {
2199         AVStream *st = ffvideo[stream]->st;
2200         AVCodecID id = st->codec->codec_id;
2201         const AVCodecDescriptor *desc = avcodec_descriptor_get(id);
2202         return desc ? desc->name : "Unknown";
2203 }
2204
2205 double FFMPEG::ff_frame_rate(int stream)
2206 {
2207         return ffvideo[stream]->frame_rate;
2208 }
2209
2210 int64_t FFMPEG::ff_video_frames(int stream)
2211 {
2212         return ffvideo[stream]->length;
2213 }
2214
2215 int FFMPEG::ff_video_pid(int stream)
2216 {
2217         return ffvideo[stream]->st->id;
2218 }
2219
2220
2221 int FFMPEG::ff_cpus()
2222 {
2223         return file_base->file->cpus;
2224 }
2225
2226 int FFVideoStream::create_filter(const char *filter_spec,
2227                 AVCodecContext *src_ctx, AVCodecContext *sink_ctx)
2228 {
2229         avfilter_register_all();
2230         AVFilter *filter = avfilter_get_by_name(filter_spec);
2231         if( !filter || filter->inputs->type != AVMEDIA_TYPE_VIDEO ) {
2232                 ff_err(AVERROR(EINVAL), "FFVideoStream::create_filter: %s\n", filter_spec);
2233                 return -1;
2234         }
2235         filter_graph = avfilter_graph_alloc();
2236         AVFilter *buffersrc = avfilter_get_by_name("buffer");
2237         AVFilter *buffersink = avfilter_get_by_name("buffersink");
2238
2239         int ret = 0;  char args[BCTEXTLEN];
2240         snprintf(args, sizeof(args),
2241                 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
2242                 src_ctx->width, src_ctx->height, src_ctx->pix_fmt,
2243                 src_ctx->time_base.num, src_ctx->time_base.den,
2244                 src_ctx->sample_aspect_ratio.num, src_ctx->sample_aspect_ratio.den);
2245         if( ret >= 0 )
2246                 ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in",
2247                         args, NULL, filter_graph);
2248         if( ret >= 0 )
2249                 ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out",
2250                         NULL, NULL, filter_graph);
2251         if( ret >= 0 )
2252                 ret = av_opt_set_bin(buffersink_ctx, "pix_fmts",
2253                         (uint8_t*)&sink_ctx->pix_fmt, sizeof(sink_ctx->pix_fmt),
2254                         AV_OPT_SEARCH_CHILDREN);
2255         if( ret < 0 )
2256                 ff_err(ret, "FFVideoStream::create_filter");
2257         else
2258                 ret = FFStream::create_filter(filter_spec);
2259         return ret >= 0 ? 0 : 1;
2260 }
2261
2262 int FFAudioStream::create_filter(const char *filter_spec,
2263                 AVCodecContext *src_ctx, AVCodecContext *sink_ctx)
2264 {
2265         avfilter_register_all();
2266         AVFilter *filter = avfilter_get_by_name(filter_spec);
2267         if( !filter || filter->inputs->type != AVMEDIA_TYPE_AUDIO ) {
2268                 ff_err(AVERROR(EINVAL), "FFAudioStream::create_filter: %s\n", filter_spec);
2269                 return -1;
2270         }
2271         filter_graph = avfilter_graph_alloc();
2272         AVFilter *buffersrc = avfilter_get_by_name("abuffer");
2273         AVFilter *buffersink = avfilter_get_by_name("abuffersink");
2274         int ret = 0;  char args[BCTEXTLEN];
2275         snprintf(args, sizeof(args),
2276                 "time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=0x%jx",
2277                 src_ctx->time_base.num, src_ctx->time_base.den, src_ctx->sample_rate,
2278                 av_get_sample_fmt_name(src_ctx->sample_fmt), src_ctx->channel_layout);
2279         if( ret >= 0 )
2280                 ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in",
2281                         args, NULL, filter_graph);
2282         if( ret >= 0 )
2283                 ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out",
2284                         NULL, NULL, filter_graph);
2285         if( ret >= 0 )
2286                 ret = av_opt_set_bin(buffersink_ctx, "sample_fmts",
2287                         (uint8_t*)&sink_ctx->sample_fmt, sizeof(sink_ctx->sample_fmt),
2288                         AV_OPT_SEARCH_CHILDREN);
2289         if( ret >= 0 )
2290                 ret = av_opt_set_bin(buffersink_ctx, "channel_layouts",
2291                         (uint8_t*)&sink_ctx->channel_layout,
2292                         sizeof(sink_ctx->channel_layout), AV_OPT_SEARCH_CHILDREN);
2293         if( ret >= 0 )
2294                 ret = av_opt_set_bin(buffersink_ctx, "sample_rates",
2295                         (uint8_t*)&sink_ctx->sample_rate, sizeof(sink_ctx->sample_rate),
2296                         AV_OPT_SEARCH_CHILDREN);
2297         if( ret < 0 )
2298                 ff_err(ret, "FFAudioStream::create_filter");
2299         else
2300                 ret = FFStream::create_filter(filter_spec);
2301         return ret >= 0 ? 0 : 1;
2302 }
2303
2304 int FFStream::create_filter(const char *filter_spec)
2305 {
2306         /* Endpoints for the filter graph. */
2307         AVFilterInOut *outputs = avfilter_inout_alloc();
2308         outputs->name = av_strdup("in");
2309         outputs->filter_ctx = buffersrc_ctx;
2310         outputs->pad_idx = 0;
2311         outputs->next = 0;
2312
2313         AVFilterInOut *inputs  = avfilter_inout_alloc();
2314         inputs->name = av_strdup("out");
2315         inputs->filter_ctx = buffersink_ctx;
2316         inputs->pad_idx = 0;
2317         inputs->next = 0;
2318
2319         int ret = !outputs->name || !inputs->name ? -1 : 0;
2320         if( ret >= 0 )
2321                 ret = avfilter_graph_parse_ptr(filter_graph, filter_spec,
2322                         &inputs, &outputs, NULL);
2323         if( ret >= 0 )
2324                 ret = avfilter_graph_config(filter_graph, NULL);
2325
2326         if( ret < 0 )
2327                 ff_err(ret, "FFStream::create_filter");
2328         avfilter_inout_free(&inputs);
2329         avfilter_inout_free(&outputs);
2330         return ret;
2331 }
2332
2333 void FFStream::add_bsfilter(const char *bsf, const char *ap)
2334 {
2335         bsfilter.append(new BSFilter(bsf,ap));
2336 }
2337
2338 int FFStream::bs_filter(AVPacket *pkt)
2339 {
2340         if( !bsfilter.size() ) return 0;
2341         av_packet_split_side_data(pkt);
2342
2343         int ret = 0;
2344         for( int i=0; i<bsfilter.size(); ++i ) {
2345                 AVPacket bspkt = *pkt;
2346                 ret = av_bitstream_filter_filter(bsfilter[i]->bsfc,
2347                          st->codec, bsfilter[i]->args, &bspkt.data, &bspkt.size,
2348                          pkt->data, pkt->size, pkt->flags & AV_PKT_FLAG_KEY);
2349                 if( ret < 0 ) break;
2350                 int size = bspkt.size;
2351                 uint8_t *data = bspkt.data;
2352                 if( !ret && bspkt.data != pkt->data ) {
2353                         size = bspkt.size;
2354                         data = (uint8_t *)av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
2355                         if( !data ) { ret = AVERROR(ENOMEM);  break; }
2356                         memcpy(data, bspkt.data, size);
2357                         memset(data+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2358                         ret = 1;
2359                 }
2360                 if( ret > 0 ) {
2361                         pkt->side_data = 0;  pkt->side_data_elems = 0;
2362                         av_free_packet(pkt);
2363                         ret = av_packet_from_data(&bspkt, data, size);
2364                         if( ret < 0 ) break;
2365                 }
2366                 *pkt = bspkt;
2367         }
2368         if( ret < 0 )
2369                 ff_err(ret,"FFStream::bs_filter");
2370         return ret;
2371 }
2372
2373 int FFMPEG::scan(IndexState *index_state, int64_t *scan_position, int *canceled)
2374 {
2375         AVPacket pkt;
2376         av_init_packet(&pkt);
2377         AVFrame *frame = av_frame_alloc();
2378         if( !frame ) {
2379                 fprintf(stderr, "FFMPEG::scan: av_frame_alloc failed\n");
2380                 return -1;
2381         }
2382
2383         index_state->add_video_markers(ffvideo.size());
2384         index_state->add_audio_markers(ffaudio.size());
2385
2386         for( int i=0; i<(int)fmt_ctx->nb_streams; ++i ) {
2387                 AVDictionary *copts = 0;
2388                 av_dict_copy(&copts, opts, 0);
2389                 AVStream *st = fmt_ctx->streams[i];
2390                 AVCodecID codec_id = st->codec->codec_id;
2391                 AVCodec *decoder = avcodec_find_decoder(codec_id);
2392                 if( avcodec_open2(st->codec, decoder, &copts) < 0 )
2393                         fprintf(stderr, "FFMPEG::scan: codec open failed\n");
2394                 av_dict_free(&copts);
2395         }
2396         int errs = 0;
2397         for( int64_t count=0; !*canceled; ++count ) {
2398                 av_packet_unref(&pkt);
2399                 pkt.data = 0; pkt.size = 0;
2400
2401                 int ret = av_read_frame(fmt_ctx, &pkt);
2402                 if( ret < 0 ) {
2403                         if( ret == AVERROR_EOF ) break;
2404                         if( ++errs > 100 ) {
2405                                 ff_err(ret, "over 100 read_frame errs\n");
2406                                 break;
2407                         }
2408                         continue;
2409                 }
2410                 if( !pkt.data ) continue;
2411                 int i = pkt.stream_index;
2412                 if( i < 0 || i >= (int)fmt_ctx->nb_streams ) continue;
2413                 AVStream *st = fmt_ctx->streams[i];
2414                 AVCodecContext *avctx = st->codec;
2415                 if( pkt.pos > *scan_position ) *scan_position = pkt.pos;
2416
2417                 switch( avctx->codec_type ) {
2418                 case AVMEDIA_TYPE_VIDEO: {
2419                         int vidx = ffvideo.size();
2420                         while( --vidx>=0 && ffvideo[vidx]->fidx != i );
2421                         if( vidx < 0 ) break;
2422                         FFVideoStream *vid = ffvideo[vidx];
2423                         int64_t tstmp = pkt.dts;
2424                         if( tstmp == AV_NOPTS_VALUE ) tstmp = pkt.pts;
2425                         if( tstmp != AV_NOPTS_VALUE && (pkt.flags & AV_PKT_FLAG_KEY) && pkt.pos > 0 ) {
2426                                 if( vid->nudge != AV_NOPTS_VALUE ) tstmp -= vid->nudge;
2427                                 double secs = to_secs(tstmp, st->time_base);
2428                                 int64_t frm = secs * vid->frame_rate + 0.5;
2429                                 if( frm < 0 ) frm = 0;
2430                                 index_state->put_video_mark(vidx, frm, pkt.pos);
2431                         }
2432 #if 0
2433                         while( pkt.size > 0 ) {
2434                                 av_frame_unref(frame);
2435                                 int got_frame = 0;
2436                                 int ret = vid->decode_frame(&pkt, frame, got_frame);
2437                                 if( ret <= 0 ) break;
2438 //                              if( got_frame ) {}
2439                                 pkt.data += ret;
2440                                 pkt.size -= ret;
2441                         }
2442 #endif
2443                         break; }
2444                 case AVMEDIA_TYPE_AUDIO: {
2445                         int aidx = ffaudio.size();
2446                         while( --aidx>=0 && ffaudio[aidx]->fidx != i );
2447                         if( aidx < 0 ) break;
2448                         FFAudioStream *aud = ffaudio[aidx];
2449                         int64_t tstmp = pkt.pts;
2450                         if( tstmp == AV_NOPTS_VALUE ) tstmp = pkt.dts;
2451                         if( tstmp != AV_NOPTS_VALUE && (pkt.flags & AV_PKT_FLAG_KEY) && pkt.pos > 0 ) {
2452                                 if( aud->nudge != AV_NOPTS_VALUE ) tstmp -= aud->nudge;
2453                                 double secs = to_secs(tstmp, st->time_base);
2454                                 int64_t sample = secs * aud->sample_rate + 0.5;
2455                                 if( sample < 0 ) sample = 0;
2456                                 index_state->put_audio_mark(aidx, sample, pkt.pos);
2457                         }
2458                         while( pkt.size > 0 ) {
2459                                 int ch = aud->channel0,  nch = aud->channels;
2460                                 int64_t pos = index_state->pos(ch);
2461                                 if( pos != aud->curr_pos ) {
2462 if( abs(pos-aud->curr_pos) > 1 )
2463 printf("audio%d pad %ld %ld (%ld)\n", aud->idx, pos, aud->curr_pos, pos-aud->curr_pos);
2464                                         index_state->pad_data(ch, nch, aud->curr_pos);
2465                                 }
2466                                 av_frame_unref(frame);
2467                                 int got_frame = 0;
2468                                 int ret = aud->decode_frame(&pkt, frame, got_frame);
2469                                 if( ret <= 0 ) break;
2470                                 if( got_frame ) {
2471                                         float *samples;
2472                                         int len = aud->get_samples(samples,
2473                                                  &frame->extended_data[0], frame->nb_samples);
2474                                         for( int i=0; i<nch; ++i )
2475                                                 index_state->put_data(ch+i,nch,samples+i,len);
2476                                         aud->curr_pos += len;
2477                                 }
2478                                 pkt.data += ret;
2479                                 pkt.size -= ret;
2480                         }
2481                         break; }
2482                 default: break;
2483                 }
2484         }
2485         av_frame_free(&frame);
2486         return 0;
2487 }
2488
2489 void FFStream::load_markers(IndexMarks &marks, double rate)
2490 {
2491         index_markers = &marks;
2492         int in = 0;
2493         int64_t sz = marks.size();
2494         int max_entries = fmt_ctx->max_index_size / sizeof(AVIndexEntry) - 1;
2495         int nb_ent = st->nb_index_entries;
2496 // some formats already have an index
2497         if( nb_ent > 0 ) {
2498                 AVIndexEntry *ep = &st->index_entries[nb_ent-1];
2499                 int64_t tstmp = ep->timestamp;
2500                 if( nudge != AV_NOPTS_VALUE ) tstmp -= nudge;
2501                 double secs = ffmpeg->to_secs(tstmp, st->time_base);
2502                 int64_t no = secs * rate;
2503                 while( in < sz && marks[in].no <= no ) ++in;
2504         }
2505         int64_t len = sz - in;
2506         int64_t count = max_entries - nb_ent;
2507         if( count > len ) count = len;
2508         for( int i=0; i<count; ++i ) {
2509                 int k = in + i * len / count;
2510                 int64_t no = marks[k].no, pos = marks[k].pos;
2511                 double secs = (double)no / rate;
2512                 int64_t tstmp = secs * st->time_base.den / st->time_base.num;
2513                 if( nudge != AV_NOPTS_VALUE ) tstmp += nudge;
2514                 av_add_index_entry(st, pos, tstmp, 0, 0, AVINDEX_KEYFRAME);
2515         }
2516 }
2517