--- /dev/null
+/*
+ * a52dec.c
+ * Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
+ * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
+ *
+ * This file is part of a52dec, a free ATSC A-52 stream decoder.
+ * See http://liba52.sourceforge.net/ for updates.
+ *
+ * a52dec is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * a52dec is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <getopt.h>
+#ifdef HAVE_IO_H
+#include <fcntl.h>
+#include <io.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#include <signal.h>
+#endif
+#include <inttypes.h>
+
+#include "a52.h"
+#include "audio_out.h"
+#include "mm_accel.h"
+
+#define BUFFER_SIZE 4096
+static uint8_t buffer[BUFFER_SIZE];
+static FILE * in_file;
+static int demux_track = 0;
+static int demux_pid = 0;
+static int disable_accel = 0;
+static int disable_dynrng = 0;
+static ao_open_t * output_open = NULL;
+static ao_instance_t * output;
+static a52_state_t * state;
+
+#ifdef HAVE_SYS_TIME_H
+
+static void print_fps (int final);
+
+static RETSIGTYPE signal_handler (int sig)
+{
+ print_fps (1);
+ signal (sig, SIG_DFL);
+ raise (sig);
+}
+
+static void print_fps (int final)
+{
+ static uint32_t frame_counter = 0;
+ static struct timeval tv_beg, tv_start;
+ static int total_elapsed;
+ static int last_count = 0;
+ struct timeval tv_end;
+ int fps, tfps, frames, elapsed;
+
+ gettimeofday (&tv_end, NULL);
+
+ if (!frame_counter) {
+ tv_start = tv_beg = tv_end;
+ signal (SIGINT, signal_handler);
+ }
+
+ elapsed = (tv_end.tv_sec - tv_beg.tv_sec) * 100 +
+ (tv_end.tv_usec - tv_beg.tv_usec) / 10000;
+ total_elapsed = (tv_end.tv_sec - tv_start.tv_sec) * 100 +
+ (tv_end.tv_usec - tv_start.tv_usec) / 10000;
+
+ if (final) {
+ if (total_elapsed)
+ tfps = frame_counter * 10000 / total_elapsed;
+ else
+ tfps = 0;
+
+ fprintf (stderr,"\n%d frames decoded in %d.%02d "
+ "seconds (%d.%02d fps)\n", frame_counter,
+ total_elapsed / 100, total_elapsed % 100,
+ tfps / 100, tfps % 100);
+
+ return;
+ }
+
+ frame_counter++;
+
+ if (elapsed < 50) /* only display every 0.50 seconds */
+ return;
+
+ tv_beg = tv_end;
+ frames = frame_counter - last_count;
+
+ fps = frames * 10000 / elapsed; /* 100x */
+ tfps = frame_counter * 10000 / total_elapsed; /* 100x */
+
+ fprintf (stderr, "%d frames in %d.%02d sec (%d.%02d fps), "
+ "%d last %d.%02d sec (%d.%02d fps)\033[K\r", frame_counter,
+ total_elapsed / 100, total_elapsed % 100,
+ tfps / 100, tfps % 100, frames, elapsed / 100, elapsed % 100,
+ fps / 100, fps % 100);
+
+ last_count = frame_counter;
+}
+
+#else /* !HAVE_SYS_TIME_H */
+
+static void print_fps (int final)
+{
+}
+
+#endif
+
+static void print_usage (char ** argv)
+{
+ int i;
+ ao_driver_t * drivers;
+
+ fprintf (stderr, "usage: "
+ "%s [-o <mode>] [-s [<track>]] [-t <pid>] [-c] [-r] <file>\n"
+ "\t-s\tuse program stream demultiplexer, track 0-7 or 0x80-0x87\n"
+ "\t-t\tuse transport stream demultiplexer, pid 0x10-0x1ffe\n"
+ "\t-c\tuse c implementation, disables all accelerations\n"
+ "\t-r\tdisable dynamic range compression\n"
+ "\t-o\taudio output mode\n", argv[0]);
+
+ drivers = ao_drivers ();
+ for (i = 0; drivers[i].name; i++)
+ fprintf (stderr, "\t\t\t%s\n", drivers[i].name);
+
+ exit (1);
+}
+
+static void handle_args (int argc, char ** argv)
+{
+ int c;
+ ao_driver_t * drivers;
+ int i;
+ char * s;
+
+ drivers = ao_drivers ();
+ while ((c = getopt (argc, argv, "s::t:cro:")) != -1)
+ switch (c) {
+ case 'o':
+ for (i = 0; drivers[i].name != NULL; i++)
+ if (strcmp (drivers[i].name, optarg) == 0)
+ output_open = drivers[i].open;
+ if (output_open == NULL) {
+ fprintf (stderr, "Invalid video driver: %s\n", optarg);
+ print_usage (argv);
+ }
+ break;
+
+ case 's':
+ demux_track = 0x80;
+ if (optarg != NULL) {
+ demux_track = strtol (optarg, &s, 16);
+ if (demux_track < 0x80)
+ demux_track += 0x80;
+ if ((demux_track < 0x80) || (demux_track > 0x87) || (*s)) {
+ fprintf (stderr, "Invalid track number: %s\n", optarg);
+ print_usage (argv);
+ }
+ }
+ break;
+
+ case 't':
+ demux_pid = strtol (optarg, &s, 16);
+ if ((demux_pid < 0x10) || (demux_pid > 0x1ffe) || (*s)) {
+ fprintf (stderr, "Invalid pid: %s\n", optarg);
+ print_usage (argv);
+ }
+ break;
+
+ case 'c':
+ disable_accel = 1;
+ break;
+
+ case 'r':
+ disable_dynrng = 1;
+ break;
+
+ default:
+ print_usage (argv);
+ }
+
+ /* -o not specified, use a default driver */
+ if (output_open == NULL)
+ output_open = drivers[0].open;
+
+ if (optind < argc) {
+ in_file = fopen (argv[optind], "rb");
+ if (!in_file) {
+ fprintf (stderr, "%s - couldnt open file %s\n", strerror (errno),
+ argv[optind]);
+ exit (1);
+ }
+ } else
+ in_file = stdin;
+}
+
+void a52_decode_data (uint8_t * start, uint8_t * end)
+{
+ static uint8_t buf[3840];
+ static uint8_t * bufptr = buf;
+ static uint8_t * bufpos = buf + 7;
+
+ /*
+ * sample_rate and flags are static because this routine could
+ * exit between the a52_syncinfo() and the ao_setup(), and we want
+ * to have the same values when we get back !
+ */
+
+ static int sample_rate;
+ static int flags;
+ int bit_rate;
+ int len;
+
+ while (1) {
+ len = end - start;
+ if (!len)
+ break;
+ if (len > bufpos - bufptr)
+ len = bufpos - bufptr;
+ memcpy (bufptr, start, len);
+ bufptr += len;
+ start += len;
+ if (bufptr == bufpos) {
+ if (bufpos == buf + 7) {
+ int length;
+
+ length = a52_syncinfo (buf, &flags, &sample_rate, &bit_rate);
+ if (!length) {
+ fprintf (stderr, "skip\n");
+ for (bufptr = buf; bufptr < buf + 6; bufptr++)
+ bufptr[0] = bufptr[1];
+ continue;
+ }
+ bufpos = buf + length;
+ } else {
+ sample_t level, bias;
+ int i;
+
+ if (ao_setup (output, sample_rate, &flags, &level, &bias))
+ goto error;
+ flags |= A52_ADJUST_LEVEL;
+ if (a52_frame (state, buf, &flags, &level, bias))
+ goto error;
+ if (disable_dynrng)
+ a52_dynrng (state, NULL, NULL);
+ for (i = 0; i < 6; i++) {
+ if (a52_block (state))
+ goto error;
+ if (ao_play (output, flags, a52_samples (state)))
+ goto error;
+ }
+ bufptr = buf;
+ bufpos = buf + 7;
+ print_fps (0);
+ continue;
+ error:
+ fprintf (stderr, "error\n");
+ bufptr = buf;
+ bufpos = buf + 7;
+ }
+ }
+ }
+}
+
+#define DEMUX_PAYLOAD_START 1
+static int demux (uint8_t * buf, uint8_t * end, int flags)
+{
+ static int mpeg1_skip_table[16] = {
+ 0, 0, 4, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+ };
+
+ /*
+ * the demuxer keeps some state between calls:
+ * if "state" = DEMUX_HEADER, then "head_buf" contains the first
+ * "bytes" bytes from some header.
+ * if "state" == DEMUX_DATA, then we need to copy "bytes" bytes
+ * of ES data before the next header.
+ * if "state" == DEMUX_SKIP, then we need to skip "bytes" bytes
+ * of data before the next header.
+ *
+ * NEEDBYTES makes sure we have the requested number of bytes for a
+ * header. If we dont, it copies what we have into head_buf and returns,
+ * so that when we come back with more data we finish decoding this header.
+ *
+ * DONEBYTES updates "buf" to point after the header we just parsed.
+ */
+
+#define DEMUX_HEADER 0
+#define DEMUX_DATA 1
+#define DEMUX_SKIP 2
+ static int state = DEMUX_SKIP;
+ static int state_bytes = 0;
+ static uint8_t head_buf[268];
+
+ uint8_t * header;
+ int bytes;
+ int len;
+
+#define NEEDBYTES(x) \
+ do { \
+ int missing; \
+ \
+ missing = (x) - bytes; \
+ if (missing > 0) { \
+ if (header == head_buf) { \
+ if (missing <= end - buf) { \
+ memcpy (header + bytes, buf, missing); \
+ buf += missing; \
+ bytes = (x); \
+ } else { \
+ memcpy (header + bytes, buf, end - buf); \
+ state_bytes = bytes + end - buf; \
+ return 0; \
+ } \
+ } else { \
+ memcpy (head_buf, header, bytes); \
+ state = DEMUX_HEADER; \
+ state_bytes = bytes; \
+ return 0; \
+ } \
+ } \
+ } while (0)
+
+#define DONEBYTES(x) \
+ do { \
+ if (header != head_buf) \
+ buf = header + (x); \
+ } while (0)
+
+ if (flags & DEMUX_PAYLOAD_START)
+ goto payload_start;
+ switch (state) {
+ case DEMUX_HEADER:
+ if (state_bytes > 0) {
+ header = head_buf;
+ bytes = state_bytes;
+ goto continue_header;
+ }
+ break;
+ case DEMUX_DATA:
+ if (demux_pid || (state_bytes > end - buf)) {
+ a52_decode_data (buf, end);
+ state_bytes -= end - buf;
+ return 0;
+ }
+ a52_decode_data (buf, buf + state_bytes);
+ buf += state_bytes;
+ break;
+ case DEMUX_SKIP:
+ if (demux_pid || (state_bytes > end - buf)) {
+ state_bytes -= end - buf;
+ return 0;
+ }
+ buf += state_bytes;
+ break;
+ }
+
+ while (1) {
+ if (demux_pid) {
+ state = DEMUX_SKIP;
+ return 0;
+ }
+ payload_start:
+ header = buf;
+ bytes = end - buf;
+ continue_header:
+ NEEDBYTES (4);
+ if (header[0] || header[1] || (header[2] != 1)) {
+ if (demux_pid) {
+ state = DEMUX_SKIP;
+ return 0;
+ } else if (header != head_buf) {
+ buf++;
+ goto payload_start;
+ } else {
+ header[0] = header[1];
+ header[1] = header[2];
+ header[2] = header[3];
+ bytes = 3;
+ goto continue_header;
+ }
+ }
+ if (demux_pid && (header[3] != 0xbd)) {
+ fprintf (stderr, "bad stream id %x\n", header[3]);
+ exit (1);
+ }
+ switch (header[3]) {
+ case 0xb9: /* program end code */
+ /* DONEBYTES (4); */
+ /* break; */
+ return 1;
+ case 0xba: /* pack header */
+ NEEDBYTES (12);
+ if ((header[4] & 0xc0) == 0x40) { /* mpeg2 */
+ NEEDBYTES (14);
+ len = 14 + (header[13] & 7);
+ NEEDBYTES (len);
+ DONEBYTES (len);
+ /* header points to the mpeg2 pack header */
+ } else if ((header[4] & 0xf0) == 0x20) { /* mpeg1 */
+ DONEBYTES (12);
+ /* header points to the mpeg1 pack header */
+ } else {
+ fprintf (stderr, "weird pack header\n");
+ exit (1);
+ }
+ break;
+ case 0xbd: /* private stream 1 */
+ NEEDBYTES (7);
+ if ((header[6] & 0xc0) == 0x80) { /* mpeg2 */
+ NEEDBYTES (9);
+ len = 10 + header[8];
+ NEEDBYTES (len);
+ /* header points to the mpeg2 pes header */
+ } else { /* mpeg1 */
+ len = 7;
+ while ((header-1)[len] == 0xff) {
+ len++;
+ NEEDBYTES (len);
+ if (len == 23) {
+ fprintf (stderr, "too much stuffing\n");
+ break;
+ }
+ }
+ if (((header-1)[len] & 0xc0) == 0x40) {
+ len += 2;
+ NEEDBYTES (len);
+ }
+ len += mpeg1_skip_table[(header - 1)[len] >> 4] + 1;
+ NEEDBYTES (len);
+ /* header points to the mpeg1 pes header */
+ }
+ if ((!demux_pid) && ((header-1)[len] != demux_track)) {
+ DONEBYTES (len);
+ bytes = 6 + (header[4] << 8) + header[5] - len;
+ if (bytes <= 0)
+ continue;
+ goto skip;
+ }
+ len += 3;
+ NEEDBYTES (len);
+ DONEBYTES (len);
+ bytes = 6 + (header[4] << 8) + header[5] - len;
+ if (demux_pid || (bytes > end - buf)) {
+ a52_decode_data (buf, end);
+ state = DEMUX_DATA;
+ state_bytes = bytes - (end - buf);
+ return 0;
+ } else if (bytes <= 0)
+ continue;
+ a52_decode_data (buf, buf + bytes);
+ buf += bytes;
+ break;
+ default:
+ if (header[3] < 0xb9) {
+ fprintf (stderr,
+ "looks like a video stream, not system stream\n");
+ exit (1);
+ } else {
+ NEEDBYTES (6);
+ DONEBYTES (6);
+ bytes = (header[4] << 8) + header[5];
+ skip:
+ if (bytes > end - buf) {
+ state = DEMUX_SKIP;
+ state_bytes = bytes - (end - buf);
+ return 0;
+ }
+ buf += bytes;
+ }
+ }
+ }
+}
+
+static void ps_loop (void)
+{
+ uint8_t * end;
+
+ do {
+ end = buffer + fread (buffer, 1, BUFFER_SIZE, in_file);
+ if (demux (buffer, end, 0))
+ break; /* hit program_end_code */
+ } while (end == buffer + BUFFER_SIZE);
+}
+
+static void ts_loop (void)
+{
+#define PACKETS (BUFFER_SIZE / 188)
+ uint8_t * buf;
+ uint8_t * data;
+ uint8_t * end;
+ int packets;
+ int i;
+ int pid;
+
+ do {
+ packets = fread (buffer, 188, PACKETS, in_file);
+ for (i = 0; i < packets; i++) {
+ buf = buffer + i * 188;
+ end = buf + 188;
+ if (buf[0] != 0x47) {
+ fprintf (stderr, "bad sync byte\n");
+ exit (1);
+ }
+ pid = ((buf[1] << 8) + buf[2]) & 0x1fff;
+ if (pid != demux_pid)
+ continue;
+ data = buf + 4;
+ if (buf[3] & 0x20) { /* buf contains an adaptation field */
+ data = buf + 5 + buf[4];
+ if (data > end)
+ continue;
+ }
+ if (buf[3] & 0x10)
+ demux (data, end, (buf[1] & 0x40) ? DEMUX_PAYLOAD_START : 0);
+ }
+ } while (packets == PACKETS);
+}
+
+static void es_loop (void)
+{
+ int size;
+
+ do {
+ size = fread (buffer, 1, BUFFER_SIZE, in_file);
+ a52_decode_data (buffer, buffer + size);
+ } while (size == BUFFER_SIZE);
+}
+
+int main (int argc, char ** argv)
+{
+ uint32_t accel;
+
+#ifdef HAVE_IO_H
+ setmode (fileno (stdout), O_BINARY);
+#endif
+
+ fprintf (stderr, PACKAGE"-"VERSION
+ " - by Michel Lespinasse <walken@zoy.org> and Aaron Holtzman\n");
+
+ handle_args (argc, argv);
+
+ accel = disable_accel ? 0 : MM_ACCEL_DJBFFT;
+
+ output = ao_open (output_open);
+ if (output == NULL) {
+ fprintf (stderr, "Can not open output\n");
+ return 1;
+ }
+
+ state = a52_init (accel);
+ if (state == NULL) {
+ fprintf (stderr, "A52 init failed\n");
+ return 1;
+ }
+
+ if (demux_pid)
+ ts_loop ();
+ else if (demux_track)
+ ps_loop ();
+ else
+ es_loop ();
+
+ a52_free (state);
+ ao_close (output);
+ print_fps (1);
+ return 0;
+}
projects / goodguy / history.git / blobdiff