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📄 mp4_parser.c

📁 最新MTK手机软件源码
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   /* creation_time */
   if((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, 4))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR;

   /* modification_time */
   if((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, 4))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR;

   if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, &(pstMp4Parser->timescale)))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR;
   if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, &(pstMp4Parser->duration)))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR;
   if((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, 76))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR;
   if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, &(pstMp4Parser->next_track_ID)))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR;

   mvhd_size -= 100;
   if((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, mvhd_size))!=FSAL_OK)
      return MP4_PARSER_FILE_SEEK_ERROR;

   pstMp4Parser->bHasMVHD = KAL_TRUE;

   return MP4_PARSER_OK;
}



/*
DESCRIPTION
   Parse the Track Header Box.
INPUT
   size: The size of Track Header Box excluding Box
RETURN
   MP4_PARSER_OK: Successful
   other values: Error
*/

static MP4_Parser_Status mp4_parse_tkhd(STMp4Parser *pstMp4Parser, kal_int32 tkhd_size)
{
   /* Track Header Box is a leaf node. */
   kal_uint8 version;
   kal_uint8 flags[3];
   kal_uint32 creation_time;
   kal_uint32 modification_time;
   kal_uint32 track_ID;
   kal_uint32 duration;
   kal_uint32 width;
   kal_uint32 height;

   MP4_PARSER_CHECK_ARG(pstMp4Parser!=NULL);

   if(tkhd_size<84)
      return MP4_PARSER_PARSE_ERROR;
 
   if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, &version, 1))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, flags, 3))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   if(version==1) /* We do not support 64 bit values. */
      return MP4_PARSER_64BIT_NOT_SUPPORT;
   if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, &creation_time))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR; 
   if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, &modification_time))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR; 
   if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, &track_ID))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR; 
   if((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, 4))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR;
   if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, &duration))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR; 
   if((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, 52))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR;
   if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, &width))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR; 
   if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, &height))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR; 
#if MP4_PARSER_VERBOSE
   printf("track_ID=%u, width=%u, height=%u\n", track_ID, width>>16, height>>16);
#endif
   tkhd_size -= 84;
   if((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, tkhd_size))!=FSAL_OK)
      return MP4_PARSER_FILE_SEEK_ERROR;

   pstMp4Parser->stMp4Track[pstMp4Parser->bCurTrack].bHasTKHD = KAL_TRUE;

   return MP4_PARSER_OK;
}



/*
DESCRIPTION
   Parse the Media Header Box.
INPUT
   size: The size of Media Header Box excluding Box
RETURN
   MP4_PARSER_OK: Successful
   other values: Error
*/

static MP4_Parser_Status mp4_parse_mdhd(STMp4Parser *pstMp4Parser, kal_int32 mdhd_size)
{
   /* Media Header Box is a leaf node. */
   kal_uint8 version;
   kal_uint8 flags[3];
   kal_uint32 uTimeScale;
   kal_uint32 uDuration;

   MP4_PARSER_CHECK_ARG(pstMp4Parser!=NULL);

   if (mdhd_size<24)
      return MP4_PARSER_PARSE_ERROR;
   
   if ((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, &version, 1))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   if ((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, flags, 3))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   if (version==1) /* We do not support 64 bit values. */
      return MP4_PARSER_64BIT_NOT_SUPPORT;

   /* creation_time */
   if ((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, 4))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR;

   /* modification_time */
   if ((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, 4))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR;
   
   if ((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, &uTimeScale))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR; 

   if ((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, &uDuration))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR; 

   pstMp4Parser->stMp4Track[pstMp4Parser->bCurTrack].uMediaTimeScale = uTimeScale;
   pstMp4Parser->stMp4Track[pstMp4Parser->bCurTrack].uMediaDuration = uDuration;

   /* ISO-639-2/T language code */
   if ((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, 4))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR;

   mdhd_size -= 24;

   if((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, mdhd_size))!=FSAL_OK)
      return MP4_PARSER_FILE_SEEK_ERROR;

   pstMp4Parser->stMp4Track[pstMp4Parser->bCurTrack].bHasMDHD = KAL_TRUE;

   return MP4_PARSER_OK;
}



/*
DESCRIPTION
   Parse the Handler Reference Box.
INPUT
   size: The size of Handler Reference Box excluding Box
RETURN
   MP4_PARSER_OK: Successful
   other values: Error
*/

static MP4_Parser_Status mp4_parse_hdlr(STMp4Parser *pstMp4Parser, kal_int32 hdlr_size)
{
   /* Handler Reference Box is a leaf node. */
   kal_uint8 version;
   kal_uint8 flags[3];
   kal_uint32 *puHandlerType;

   MP4_PARSER_CHECK_ARG(pstMp4Parser!=NULL);

   if(hdlr_size<24)
      return MP4_PARSER_PARSE_ERROR;
 
   if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, &version, 1))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, flags, 3))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;
   
   if((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, 4))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR;
   
   MP4_PARSER_ASSERT(pstMp4Parser->bCurTrack < MP4_NUM_TRACKS);

   puHandlerType = &(pstMp4Parser->stMp4Track[pstMp4Parser->bCurTrack].handler_type);

   if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, puHandlerType))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR; 

   if (HDLR_TYPE_SOUN == *puHandlerType) {
      pstMp4Parser->bAudioTrack = pstMp4Parser->bCurTrack;
   } else if (HDLR_TYPE_VIDE == *puHandlerType) {
      pstMp4Parser->bVideoTrack = pstMp4Parser->bCurTrack;
   }

   if((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, 12))!=FSAL_OK)
      return MP4_PARSER_PARSE_ERROR;

   hdlr_size -= 24;
   if((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, hdlr_size))!=FSAL_OK)
      return MP4_PARSER_FILE_SEEK_ERROR;

   pstMp4Parser->stMp4Track[pstMp4Parser->bCurTrack].bHasHDLR = KAL_TRUE;

   return MP4_PARSER_OK;
}



/*
DESCRIPTION
   Parse Elementary Stream Descriptor(ESD) Box.
   Refer to 14496-14 and 14496-1.
INPUT
   size: The size of ESD Box excluding Box
RETURN
   MP4_PARSER_OK: Successful
   other values: Error
*/

MP4_Parser_Status mp4_parse_esds(STMp4Parser *pstMp4Parser, kal_int32 esds_size)
{
   /* ESD Box is a leaf node. */
   kal_uint8 version;
   kal_uint8 flags[3];

   /* ES Descriptor */
   kal_uint16 ES_ID;
   kal_uint8 flag;

   /* Decoder COnfig Descriptor */
   kal_uint8 objectTypeIndication;
   kal_uint8 streamType;
   kal_uint32 bufferSizeDB;
   kal_uint32 maxBitrate;
   kal_uint32 avgBitrate;

   MP4_PARSER_CHECK_ARG(pstMp4Parser!=NULL);
  
   if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, &version, 1))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, flags, 3))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   esds_size -= 4;

   /* ES_Descriptor */
   {
      MP4_Parser_Status ret;
      kal_uint8 tag;
      kal_uint32 size;
      kal_uint32 pos1, pos2;

      MP4_PARSER_FILE_GET_CUR_POS(pos1);
      if((ret=mp4_parse_base_descriptor(pstMp4Parser, &tag, &size))!=MP4_PARSER_OK)
         return ret;
      MP4_PARSER_FILE_GET_CUR_POS(pos2);
      esds_size -= pos2-pos1;

      if(tag!=0x03) /* ES_DescrTag */
         return MP4_PARSER_ES_DESCR_TAG_EXPECTED;

      if((pstMp4Parser->eFSALErr=FSAL_Read_UINT16(pstMp4Parser->pstFSAL, &ES_ID))!=FSAL_OK)
         return MP4_PARSER_PARSE_ERROR;

      if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, &flag, 1))!=FSAL_OK)
         return MP4_PARSER_FILE_READ_ERROR;

#if 0
/* under construction !*/
/* under construction !*/
/* under construction !*/
/* under construction !*/
#endif
      esds_size -= 3;
   }

   /* DecoderConfigDescription */
   {
      MP4_Parser_Status ret;
      kal_uint8 tag;
      kal_uint32 size;
      kal_uint32 pos1, pos2;

      MP4_PARSER_FILE_GET_CUR_POS(pos1);
      if((ret=mp4_parse_base_descriptor(pstMp4Parser, &tag, &size))!=MP4_PARSER_OK)
         return ret;
      MP4_PARSER_FILE_GET_CUR_POS(pos2);
      esds_size -= (pos2-pos1);
      if(tag!=0x04) /* DecoderConfigDescrTag */
         return MP4_PARSER_PARSE_ERROR;

      if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, &objectTypeIndication, 1))!=FSAL_OK)
         return MP4_PARSER_FILE_READ_ERROR;

      if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, &streamType, 1))!=FSAL_OK)
         return MP4_PARSER_FILE_READ_ERROR;

      streamType = (unsigned char)(streamType >> 2);

      if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, (kal_uint8*)&bufferSizeDB, 3))!=FSAL_OK)
         return MP4_PARSER_FILE_READ_ERROR;
      
      if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, &maxBitrate))!=FSAL_OK)
         return MP4_PARSER_PARSE_ERROR; 
    
      if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, &avgBitrate))!=FSAL_OK)
         return MP4_PARSER_PARSE_ERROR; 

      esds_size -= 13;
   }

   /* DecoderSpecificInfo */
   {
      MP4_Parser_Status ret;
      kal_uint8 tag;
      kal_uint32 size;
      kal_uint32 pos1, pos2;

      MP4_PARSER_FILE_GET_CUR_POS(pos1);
      if ((ret=mp4_parse_base_descriptor(pstMp4Parser, &tag, &size))!=MP4_PARSER_OK)
         return ret;
      MP4_PARSER_FILE_GET_CUR_POS(pos2);
      esds_size -= pos2-pos1;
      if (tag!=0x05) /* DecSpecificInfoTag */
         return MP4_PARSER_PARSE_ERROR;
      if (0x05==streamType) { /* streamType == Audio Stream */
         if (0x40==objectTypeIndication) {
            /* objectType == 14496-3 */
            mp4_parse_decoder_config_14496_3(pstMp4Parser, size);
            esds_size -= size;
            pstMp4Parser->bAudioType = MP4_AUDIO_AAC;
            pstMp4Parser->uAudioMaxBitrate = maxBitrate;
            pstMp4Parser->uAudioAvgBitrate = avgBitrate;
         } else if (objectTypeIndication==0xD0) {
            /* amr produced by PacketVideo Author, not standard */
         }
      } else if (0x04==streamType) { /* streamType == Visual Stream */
         if (0x20==objectTypeIndication) { 
            /* objectType == 14496-2 */
            /* for video, the following is video-object-sequence */
            pstMp4Parser->bVideoType = MP4_VIDEO_MPEG4;
            MP4_PARSER_FILE_GET_CUR_POS(pstMp4Parser->uVOSOffset);
            pstMp4Parser->uVOSSize = size;
#if 0
/* under construction !*/
/* under construction !*/
/* under construction !*/
/* under construction !*/
#endif
         }
      }

   }

   if((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, esds_size))!=FSAL_OK)
      return MP4_PARSER_FILE_SEEK_ERROR;

   return MP4_PARSER_OK;
}



/*
DESCRIPTION
   Parse the Sample Description Box.
INPUT
   size: The size of Sample Description Box excluding Box
RETURN
   MP4_PARSER_OK: Successful
   other values: Error
*/

static MP4_Parser_Status mp4_parse_stsd(STMp4Parser *pstMp4Parser, kal_int32 stsd_size)
{
   /* Sample Description Box is a leaf node. */
   kal_uint8 version;
   kal_uint8 flags[3];
   kal_uint32 entry_count;
1234

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