mp4trackdump.cpp

完整的RTP RTSP代码库

/*
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is MPEG4IP.
 * 
 * The Initial Developer of the Original Code is Cisco Systems Inc.
 * Portions created by Cisco Systems Inc. are
 * Copyright (C) Cisco Systems Inc. 2001.  All Rights Reserved.
 * 
 * Contributor(s): 
 *		Dave Mackie		[e-mail]
 */

// N.B. mp4extract just extracts tracks/samples from an mp4 file
// For many track types this is insufficient to reconsruct a valid
// elementary stream (ES). Use "mp4creator -extract=<trackId>" if
// you need the ES reconstructed. 

#include "mp4.h"
#include "mpeg4ip_getopt.h"

char* ProgName;
char* Mp4PathName;
char* Mp4FileName;
static void DumpTrack (MP4FileHandle mp4file, MP4TrackId tid)
{
  uint32_t numSamples;
  MP4SampleId sid;
  MP4Duration time;
  uint32_t timescale;
  uint64_t msectime;

  uint64_t sectime, mintime, hrtime;

  numSamples = MP4GetTrackNumberOfSamples(mp4file, tid);
  timescale = MP4GetTrackTimeScale(mp4file, tid);
  printf("mp4file %s, track %d, samples %d, timescale %d\n", 
	 Mp4FileName, tid, numSamples, timescale);

  for (sid = 1; sid <= numSamples; sid++) {
    time = MP4GetSampleTime(mp4file, tid, sid);
    msectime = time;
    msectime *= TO_U64(1000);
    msectime /= timescale;
    if (msectime == 0) {
      hrtime = mintime = sectime = TO_U64(0);
    } else {
      hrtime = msectime / TO_U64(3600 * 1000);
      msectime -= hrtime * TO_U64(3600 * 1000);
      mintime = msectime / TO_U64(60 * 1000);
      msectime -= (mintime * TO_U64(60 * 1000));
      sectime = msectime / TO_U64(1000);
      msectime -= sectime * TO_U64(1000);
    }

    printf("sampleId %6d, size %5u duration %8"U64F" time %8"U64F" %02"U64F":%02"U64F":%02"U64F".%03"U64F" %c\n",
	  sid,  MP4GetSampleSize(mp4file, tid, sid), 
	   MP4GetSampleDuration(mp4file, tid, sid),
	   time, hrtime, mintime, sectime, msectime,
	   MP4GetSampleSync(mp4file, tid, sid) == 1 ? 'S' : ' ');
  }
}

int main(int argc, char** argv)
{
  const char* usageString = 
    "[-l] [-t <track-id>] [-s <sample-id>] [-v [<level>]] <file-name>\n";
  MP4TrackId trackId = MP4_INVALID_TRACK_ID;
  MP4SampleId sampleId = MP4_INVALID_SAMPLE_ID;
  u_int32_t verbosity = MP4_DETAILS_ERROR;

  /* begin processing command line */
  ProgName = argv[0];
  while (true) {
    int c = -1;
    int option_index = 0;
    static struct option long_options[] = {
      { "track", 1, 0, 't' },
      { "sample", 1, 0, 's' },
      { "verbose", 2, 0, 'v' },
      { "version", 0, 0, 'V' },
      { NULL, 0, 0, 0 }
    };

    c = getopt_long_only(argc, argv, "t:v::V",
			 long_options, &option_index);

    if (c == -1)
      break;

    switch (c) {
    case 's':
      if (sscanf(optarg, "%u", &sampleId) != 1) {
	fprintf(stderr, "%s: bad sample-id specified: %s\n", 
		ProgName, optarg);
	exit(1);
      }
      break;
    case 't':
      if (sscanf(optarg, "%u", &trackId) != 1) {
	fprintf(stderr, 
		"%s: bad track-id specified: %s\n",
		ProgName, optarg);
	exit(1);
      }
      break;
    case 'v':
      verbosity |= MP4_DETAILS_READ;
      if (optarg) {
	u_int32_t level;
	if (sscanf(optarg, "%u", &level) == 1) {
	  if (level >= 2) {
	    verbosity |= MP4_DETAILS_TABLE;
	  } 
	  if (level >= 3) {
	    verbosity |= MP4_DETAILS_SAMPLE;
	  } 
	  if (level >= 4) {
	    verbosity = MP4_DETAILS_ALL;
	  }
	}
      }
      break;
    case '?':
      fprintf(stderr, "usage: %s %s", ProgName, usageString);
      exit(0);
    case 'V':
      fprintf(stderr, "%s - %s version %s\n", 
	      ProgName, MPEG4IP_PACKAGE, MPEG4IP_VERSION);
      exit(0);
    default:
      fprintf(stderr, "%s: unknown option specified, ignoring: %c\n", 
	      ProgName, c);
    }
  }

  /* check that we have at least one non-option argument */
  if ((argc - optind) < 1) {
    fprintf(stderr, "usage: %s %s", ProgName, usageString);
    exit(1);
  }
	
  if (verbosity) {
    fprintf(stderr, "%s version %s\n", ProgName, MPEG4IP_VERSION);
  }

  /* point to the specified file names */
  Mp4PathName = argv[optind++];

  char* lastSlash = strrchr(Mp4PathName, '/');
  if (lastSlash) {
    Mp4FileName = lastSlash + 1;
  } else {
    Mp4FileName = Mp4PathName; 
  }

  /* warn about extraneous non-option arguments */
  if (optind < argc) {
    fprintf(stderr, "%s: unknown options specified, ignoring: ", ProgName);
    while (optind < argc) {
      fprintf(stderr, "%s ", argv[optind++]);
    }
    fprintf(stderr, "\n");
  }

  /* end processing of command line */


  MP4FileHandle mp4File = MP4Read(Mp4PathName, verbosity);

  if (!mp4File) {
    exit(1);
  }
  
  if (sampleId != MP4_INVALID_SAMPLE_ID) {
    if (trackId == 0) {
      fprintf(stderr, "%s: Must specify track for sample\n", ProgName);
      return -1;
    }
    if (sampleId > MP4GetTrackNumberOfSamples(mp4File, trackId)) {
      fprintf(stderr, "%s: Sample number %u is past end %u\n", 
	      ProgName, sampleId, MP4GetTrackNumberOfSamples(mp4File, trackId));
      return -1;
    }
    uint32_t sample_size = MP4GetTrackMaxSampleSize(mp4File, trackId);
    uint8_t *sample = (uint8_t *)malloc(sample_size);
    MP4Timestamp sampleTime;
    MP4Duration sampleDuration, sampleRenderingOffset;
    uint32_t this_size = sample_size;
    bool isSyncSample;
    bool ret = MP4ReadSample(mp4File, 
			     trackId, 
			     sampleId, 
			     &sample,
			     &this_size,
			     &sampleTime, 
			     &sampleDuration, 
			     &sampleRenderingOffset,
			     &isSyncSample);
    if (ret == false) {
      fprintf(stderr, "Sample read error\n");
      return -1;
    }
    printf("Track %u, Sample %u, Length %u\n", 
	   trackId, sampleId, this_size);

    for (uint32_t ix = 0; ix < this_size; ix++) {
      if ((ix % 16) == 0) printf("\n%04u ", ix);
      printf("%02x ", sample[ix]);
    }
    printf("\n");
  } else {
    if (trackId == 0) {
      u_int32_t numTracks = MP4GetNumberOfTracks(mp4File);
      
      for (u_int32_t i = 0; i < numTracks; i++) {
	trackId = MP4FindTrackId(mp4File, i);
	DumpTrack(mp4File, trackId);
      }
    } else {
      DumpTrack(mp4File, trackId);
    }
  }

  MP4Close(mp4File);

  return(0);
}