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