/*!
* \brief Parse a mp4 file.
* \param *video A pointer to a VideoFile_t structure.
* \return retcode 1 if succeed, 0 otherwise.
*
* This parser is based on the 'ISO/IEC 13818-1' international standard, part 1:
* 'Transmission multiplexing and synchronization'.
*/
int ps_fileParse(VideoFile_t *video)
{
TRACE_INFO(MPS, BLD_GREEN "ps_fileParse()\n" CLR_RESET);
int retcode = SUCCESS;
int sid = 0;
// Init bitstream to parse container infos
Bitstream_t *bitstr = init_bitstream(video, NULL);
if (bitstr != NULL)
{
// Init bitstream_map to store container infos
retcode = init_bitstream_map(&video->tracks_audio[0], 999999);
retcode = init_bitstream_map(&video->tracks_video[0], 999999);
if (retcode == SUCCESS)
{
video->tracks_audio[0]->stream_type = stream_AUDIO;
video->tracks_audio[0]->stream_level = stream_level_PES;
video->tracks_audio[0]->stream_codec = CODEC_MPEG_L3;
video->tracks_audio[0]->sample_alignment = false;
video->tracks_video[0]->stream_type = stream_VIDEO;
video->tracks_video[0]->stream_level = stream_level_PES;
video->tracks_video[0]->stream_codec = CODEC_MPEG12;
video->tracks_video[0]->sample_alignment = false;
// Read bitstream
while (retcode == SUCCESS &&
(bitstream_get_absolute_byte_offset(bitstr) + 4) < video->file_size &&
next_bits(bitstr, 32) != PES_PROGRAM_END)
{
PackHeader_t pack_header;
SystemHeader_t system_header;
if (read_bits(bitstr, 32) == PES_PACK_HEADER)
{
// Parse pack & system header
retcode = parse_pack_header(bitstr, &pack_header, &system_header);
// Then loop on PES
while (retcode == SUCCESS &&
(bitstream_get_absolute_byte_offset(bitstr) + 4) < video->file_size &&
next_bits(bitstr, 32) != PES_PACK_HEADER &&
next_bits(bitstr, 32) != PES_PROGRAM_END)
{
// Init
PesPacket_t pes_packet;
ProgramStreamMap_t pes_streammap;
ProgramStreamDirectory_t pes_streamdirectory;
// Parse start code
pes_packet.packet_start_offset = bitstream_get_absolute_byte_offset(bitstr);
pes_packet.packet_start_code = read_bits(bitstr, 24);
pes_packet.stream_id = (uint8_t)read_bits(bitstr, 8);
if (pes_packet.packet_start_code == PES_PACKETSTARTCODE)
{
switch (pes_packet.stream_id)
{
case SID_PROGRAM_STREAM_MAP:
retcode = parse_program_stream_map(bitstr, &pes_streammap);
break;
case SID_PROGRAM_STREAM_DIRECTORY:
retcode = parse_program_stream_directory(bitstr, &pes_streamdirectory);
break;
case SID_PADDING:
retcode = parse_pes_padding(bitstr, &pes_packet);
break;
case SID_PRIVATE_STREAM_1:
TRACE_2(MPS, BLD_GREEN "Private Stream 1 PES" CLR_RESET " @ %i\n", pes_packet.packet_start_offset);
retcode = skip_pes(bitstr, &pes_packet);
break;
case SID_PRIVATE_STREAM_2:
TRACE_2(MPS, BLD_GREEN "Private Stream 2 PES" CLR_RESET " @ %i\n", pes_packet.packet_start_offset);
retcode = skip_pes(bitstr, &pes_packet);
break;
case SID_VIDEO:
TRACE_INFO(MPS, BLD_GREEN "parse_pes_video()" CLR_RESET " @ %i\n", pes_packet.packet_start_offset);
retcode = parse_pes(bitstr, &pes_packet);
//print_pes(&pes_packet);
// Set sample into the bitstream_map
video->tracks_video[0]->sample_count++;
sid = video->tracks_video[0]->sample_count;
if (sid < 999999)
{
video->tracks_video[0]->sample_type[sid] = sample_VIDEO;
video->tracks_video[0]->sample_size[sid] = pes_packet.PES_packet_length + 6;
video->tracks_video[0]->sample_offset[sid] = pes_packet.packet_start_offset;
video->tracks_video[0]->sample_pts[sid] = pes_packet.PTS;
video->tracks_video[0]->sample_dts[sid] = pes_packet.DTS;
}
break;
case SID_AUDIO:
TRACE_INFO(MPS, BLD_GREEN "parse_pes_audio()" CLR_RESET " @ %i\n", pes_packet.packet_start_offset);
retcode = parse_pes(bitstr, &pes_packet);
//print_pes(&pes_packet);
// Set sample into the bitstream_map
video->tracks_audio[0]->sample_count++;
sid = video->tracks_audio[0]->sample_count;
if (sid < 999999)
{
video->tracks_audio[0]->sample_type[sid] = sample_AUDIO;
video->tracks_audio[0]->sample_size[sid] = pes_packet.PES_packet_length + 6;
video->tracks_audio[0]->sample_offset[sid] = pes_packet.packet_start_offset;
video->tracks_audio[0]->sample_pts[sid] = pes_packet.PTS;
video->tracks_audio[0]->sample_dts[sid] = pes_packet.DTS;
}
break;
default:
TRACE_WARNING(MPS, "Unknown PES type (0x%06X%02X) @ %i\n", pes_packet.packet_start_code, pes_packet.stream_id, pes_packet.packet_start_offset);
retcode = skip_pes(bitstr, &pes_packet);
break;
}
}
else
{
TRACE_ERROR(MPS, "No valid packet_start_code at %i\n", pes_packet.packet_start_offset);
retcode = FAILURE;
}
}
}
else
{
TRACE_ERROR(MPS, "No pack header\n");
retcode = FAILURE;
}
}
}
// Free bitstream
free_bitstream(&bitstr);
}
return retcode;
}
int ps_fileParse(MediaFile_t *media)
{
int retcode = SUCCESS;
TRACE_INFO(MPS, BLD_GREEN "ps_fileParse()" CLR_RESET);
// Init bitstream to parse container infos
Bitstream_t *bitstr = init_bitstream(media, NULL);
if (bitstr != NULL)
{
// Init an MpegPs structure
MpegPs_t mpg;
memset(&mpg, 0, sizeof(MpegPs_t));
// A convenient way to stop the parser
mpg.run = true;
// stuff
const int64_t min_packet_size = 4;
// Loop on PES packets
while (mpg.run == true &&
retcode == SUCCESS &&
bitstream_get_absolute_byte_offset(bitstr) < (media->file_size - min_packet_size))
{
// Init
PackHeader_t pack_header;
memset(&pack_header, 0, sizeof(PackHeader_t));
SystemHeader_t system_header;
memset(&system_header, 0, sizeof(SystemHeader_t));
PesHeader_t pes_header;
memset(&pes_header, 0, sizeof(PesHeader_t));
PesPacket_t pes_packet;
memset(&pes_packet, 0, sizeof(PesPacket_t));
ProgramStreamMap_t pes_streammap;
memset(&pes_streammap, 0, sizeof(ProgramStreamMap_t));
ProgramStreamDirectory_t pes_streamdirectory;
memset(&pes_streamdirectory, 0, sizeof(ProgramStreamDirectory_t));
// Parse packet header
parse_pes_header(bitstr, &pes_header);
switch (pes_header.stream_id)
{
case SID_PACK_HEADER:
retcode = parse_pack_header(bitstr, &pes_header, &pack_header);
mpg.stat_packheader++;
break;
case SID_SYSTEM_HEADER:
retcode = parse_system_header(bitstr, &pes_header, &system_header);
mpg.stat_systemheader++;
break;
case SID_PROGRAM_STREAM_MAP:
retcode = parse_program_stream_map(bitstr, &pes_header, &pes_streammap);
mpg.stat_packet_psm++;
break;
case SID_PROGRAM_STREAM_DIRECTORY:
retcode = parse_program_stream_directory(bitstr, &pes_header, &pes_streamdirectory);
mpg.stat_packet_psd++;
break;
case SID_PRIVATE_STREAM_2:
TRACE_2(MPS, BLD_GREEN "Private Stream 2 PES" CLR_RESET " @ %lli", pes_header.offset_start);
mpg.stat_packet_private++;
break;
case SID_PADDING:
retcode = parse_pes_padding(bitstr, &pes_header, &pes_packet);
mpg.stat_packet_other++;
break;
case 0xC1: case 0xC2: case 0xC3: case 0xC4: case 0xC5: case 0xC6:
case 0xC7: case 0xC8: case 0xC9: case 0xCA: case 0xCB: case 0xCC:
case 0xCD: case 0xCE: case 0xCF: case 0xD0: case 0xD1: case 0xD2:
case 0xD3: case 0xD4: case 0xD5: case 0xD6: case 0xD7: case 0xD8:
case 0xD9: case 0xDA: case 0xDB: case 0xDC: case 0xDD: case 0xDE:
case 0xDF: case SID_PRIVATE_STREAM_1: case SID_AUDIO:
{
TRACE_INFO(MPS, BLD_GREEN "parse_pes_audio()" CLR_RESET " @ %lli", pes_header.offset_start);
// Find a trackid
unsigned track_id = pes_header.stream_id - 0xC0;
if (pes_header.stream_id == SID_PRIVATE_STREAM_1)
track_id = 0;
// If a private stream is in the stream, the 'regular' trackid order is shifted
//while (media->tracks_audio[track_id] == NULL)
// track_id--;
// Init bitstream_map (as needed) to store samples
if (media->tracks_audio[track_id] == NULL)
{
retcode = init_bitstream_map(&media->tracks_audio[track_id], 0, 999999);
media->tracks_audio_count++;
media->tracks_audio[track_id]->stream_type = stream_AUDIO;
}
retcode = parse_pes(bitstr, &pes_header, &pes_packet);
parse_pes_a(bitstr, &pes_header, &pes_packet, media->tracks_audio[track_id]);
mpg.stat_packet_audio++;
// Set sample into the bitstream_map
unsigned sample_id = media->tracks_audio[track_id]->sample_count++;
if (sample_id < 999999)
{
media->tracks_audio[track_id]->sample_type[sample_id] = sample_AUDIO;
media->tracks_audio[track_id]->sample_size[sample_id] = pes_header.payload_length - pes_packet.PES_header_data_length;
media->tracks_audio[track_id]->sample_offset[sample_id] = pes_header.offset_start + 6 + pes_packet.PES_header_data_length;
media->tracks_audio[track_id]->sample_pts[sample_id] = pes_packet.PTS;
media->tracks_audio[track_id]->sample_dts[sample_id] = pes_packet.DTS;
}
}
break;
case 0xE1: case 0xE2: case 0xE3: case 0xE4: case 0xE5:
case 0xE6: case 0xE7: case 0xE8: case 0xE9: case 0xEA:
case 0xEB: case 0xEC: case 0xED: case 0xEE: case 0xEF:
case SID_VIDEO:
{
TRACE_INFO(MPS, BLD_GREEN "parse_pes_video()" CLR_RESET " @ %lli", pes_header.offset_start + 6);
// Init bitstream_map (as needed) to store samples
unsigned track_id = pes_header.stream_id - 0xE0;
if (media->tracks_video[track_id] == NULL)
{
retcode = init_bitstream_map(&media->tracks_video[track_id], 0, 999999);
media->tracks_video_count++;
media->tracks_video[track_id]->stream_type = stream_VIDEO;
}
retcode = parse_pes(bitstr, &pes_header, &pes_packet);
parse_pes_v(bitstr, &pes_header, &pes_packet, media->tracks_video[track_id]);
mpg.stat_packet_video++;
// Set sample into the bitstream_map
unsigned sample_id = media->tracks_video[track_id]->sample_count++;
if (sample_id < 999999)
{
media->tracks_video[track_id]->sample_type[sample_id] = sample_VIDEO;
media->tracks_video[track_id]->sample_size[sample_id] = pes_header.payload_length - pes_packet.PES_header_data_length;
media->tracks_video[track_id]->sample_offset[sample_id] = pes_header.offset_start + 6 + pes_packet.PES_header_data_length;
media->tracks_video[track_id]->sample_pts[sample_id] = pes_packet.PTS;
media->tracks_video[track_id]->sample_dts[sample_id] = pes_packet.DTS;
}
}
break;
case SID_PROGRAM_END:
mpg.stat_packet_other++;
mpg.run = false;
break;
default:
TRACE_WARNING(MPS, "Unknown PES packet type (0x%02X) @ %lli",
pes_header.stream_id, pes_header.offset_start);
mpg.stat_packet_other++;
break;
}
retcode = jumpy_pes(bitstr, &pes_header);
}
// Free bitstream
free_bitstream(&bitstr);
// Recap
TRACE_INFO(MPS, "MPEG PS (version %u) stats", mpg.mpeg_version);
TRACE_INFO(MPS, "- Pack Headers: %u", mpg.stat_packheader);
TRACE_INFO(MPS, "- System Headers: %u", mpg.stat_systemheader);
TRACE_INFO(MPS, "- PSM packets: %u", mpg.stat_packet_psm);
TRACE_INFO(MPS, "- PSD packets: %u", mpg.stat_packet_psd);
TRACE_INFO(MPS, "- Private packets: %u", mpg.stat_packet_private);
TRACE_INFO(MPS, "- Audio packets: %u", mpg.stat_packet_audio);
TRACE_INFO(MPS, "- Video packets: %u", mpg.stat_packet_video);
TRACE_INFO(MPS, "- Unknown packets: %u", mpg.stat_packet_other);
}
else
{
retcode = FAILURE;
}
return retcode;
}
