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MXF demuxer 

Originally committed as revision 5826 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2006-07-25 14:30:14 +00:00
parent 43dcf590d8
commit 07bf2af864
6 changed files with 515 additions and 0 deletions
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1
Changelog
View File

@ -51,6 +51,7 @@ version <next>
- GXF demuxer
- Chinese AVS decoder
- GXF muxer
- MXF demuxer
version 0.4.9-pre1:

1
MAINTAINERS
View File

@ -198,6 +198,7 @@ Muxers/Demuxers:
img2.c Michael Niedermayer
mov.c Francois Revol, Michael Niedermayer
mpegts* Mans Rullgard
mxf.c Baptiste Coudurier
nsvdec.c Francois Revol
nut.c Alex Beregszaszi
nuv.c Reimar Doeffinger

1
libavformat/Makefile
View File

@ -75,6 +75,7 @@ OBJS-$(CONFIG_MPEGPS_DEMUXER) += mpeg.o
OBJS-$(CONFIG_MPEGTS_DEMUXER) += mpegts.o
OBJS-$(CONFIG_MPEGTS_MUXER) += mpegtsenc.o
OBJS-$(CONFIG_MPJPEG_MUXER) += mpjpeg.o
OBJS-$(CONFIG_MXF_DEMUXER) += mxf.o
OBJS-$(CONFIG_NSV_DEMUXER) += nsvdec.o riff.o
OBJS-$(CONFIG_NUT_DEMUXER) += nut.o riff.o
OBJS-$(CONFIG_NUT_MUXER) += nut.o riff.o

3
libavformat/allformats.c
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@ -240,6 +240,9 @@ void av_register_all(void)
#ifdef CONFIG_MPJPEG_MUXER
av_register_output_format(&mpjpeg_muxer);
#endif
#ifdef CONFIG_MXF_DEMUXER
av_register_input_format(&mxf_demuxer);
#endif
#ifdef CONFIG_NSV_DEMUXER
av_register_input_format(&nsv_demuxer);
#endif

1
libavformat/allformats.h
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@ -69,6 +69,7 @@ extern AVInputFormat mpegps_demuxer;
extern AVInputFormat mpegts_demuxer;
extern AVOutputFormat mpegts_muxer;
extern AVOutputFormat mpjpeg_muxer;
extern AVInputFormat mxf_demuxer;
extern AVInputFormat nsv_demuxer;
extern AVInputFormat nut_demuxer;
extern AVOutputFormat nut_muxer;

508
libavformat/mxf.c Normal file
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@ -0,0 +1,508 @@
/*
* MXF demuxer.
* Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* References
* SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
* SMPTE 377M MXF File Format Specifications
* SMPTE 378M Operational Pattern 1a
* SMPTE 379M MXF Generic Container
* SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
* SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
* SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
*
* Principle
* Search for Track numbers which will identify essence element KLV packets.
* Search for SourcePackage which define tracks which contains Track numbers.
* Material Package tracks does not contain Tracks numbers.
* Search for Descriptors (Picture, Sound) which contains codec info and parameters.
* Assign Descriptors to correct Tracks.
*
* Preliminary demuxer, only OP1A supported and some files might not work at all.
*/
//#define DEBUG
#include "avformat.h"
#include "dsputil.h"
#include "riff.h"
typedef struct {
AVStream *stream;
uint8_t track_uid[16];
uint8_t sequence_uid[16];
int track_id;
int track_number;
} MXFTrack;
typedef struct {
DECLARE_ALIGNED_16(uint8_t, essence_container[16]);
DECLARE_ALIGNED_16(uint8_t, essence_compression[16]);
enum CodecType codec_type;
AVRational sample_rate;
AVRational aspect_ratio;
int width;
int height;
int channels;
int bits_per_sample;
int block_align;
int linked_track_id;
int kind;
} MXFDescriptor;
typedef struct {
AVFormatContext *fc;
MXFTrack *tracks;
MXFDescriptor *descriptors;
int descriptors_count;
int tracks_count;
} MXFContext;
typedef struct {
DECLARE_ALIGNED_16(uint8_t, key[16]);
offset_t offset;
uint64_t length;
} KLVPacket;
static const uint8_t mxf_metadata_source_package_key[] = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x37, 0x00 };
static const uint8_t mxf_metadata_sequence_key[] = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x0F, 0x00 };
static const uint8_t mxf_metadata_generic_sound_descriptor_key[] = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x42, 0x00 };
static const uint8_t mxf_metadata_cdci_descriptor_key[] = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x28, 0x00 };
static const uint8_t mxf_metadata_mpegvideo_descriptor_key[] = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x51, 0x00 };
static const uint8_t mxf_metadata_wave_descriptor_key[] = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x48, 0x00 };
static const uint8_t mxf_metadata_track_key[] = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x3b, 0x00 };
static const uint8_t mxf_header_partition_pack_key[] = { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01, 0x0d, 0x01, 0x02, 0x01, 0x01, 0x02 };
static const uint8_t mxf_essence_element_key[] = { 0x06, 0x0e, 0x2b, 0x34, 0x01, 0x02, 0x01 };
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
#define PRINT_KEY(x) \
do { \
int iterpk; \
for (iterpk = 0; iterpk < 16; iterpk++) { \
av_log(NULL, AV_LOG_DEBUG, "%02X ", x[iterpk]); \
} \
av_log(NULL, AV_LOG_DEBUG, "\n"); \
} while (0); \
static int64_t klv_decode_ber_length(ByteIOContext *pb)
{
int64_t size = 0;
uint8_t length = get_byte(pb);
int type = length >> 7;
if (type) { /* long form */
int bytes_num = length & 0x7f;
/* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
if (bytes_num > 8)
return -1;
while (bytes_num--)
size = size << 8 | get_byte(pb);
} else {
size = length & 0x7f;
}
return size;
}
static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
{
klv->offset = url_ftell(pb);
get_buffer(pb, klv->key, 16);
klv->length = klv_decode_ber_length(pb);
if (klv->length == -1)
return -1;
else
return 0;
}
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
{
int id = BE_32(klv->key + 12); /* SMPTE 379M 7.3 */
int i;
for (i = 0; i < s->nb_streams; i++) {
if (s->streams[i]->id == id)
return i;
}
return -1;
}
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
{
KLVPacket klv;
while (!url_feof(&s->pb)) {
if (klv_read_packet(&klv, &s->pb) < 0)
return -1;
if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
av_get_packet(&s->pb, pkt, klv.length);
pkt->stream_index = mxf_get_stream_index(s, &klv);
if (pkt->stream_index == -1)
return -1;
return 0;
} else
url_fskip(&s->pb, klv.length);
}
return AVERROR_IO;
}
static int mxf_read_metadata_track(MXFContext *mxf, KLVPacket *klv)
{
ByteIOContext *pb = &mxf->fc->pb;
AVRational time_base = (AVRational){0, 0};
uint8_t sequence_uid[16];
uint8_t track_uid[16];
int track_number = 0;
int track_id = 0;
int bytes_read = 0;
int i;
while (bytes_read < klv->length) {
int tag = get_be16(pb);
int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
switch (tag) {
case 0x4801:
track_id = get_be32(pb);
break;
case 0x4804:
track_number = get_be32(pb);
break;
case 0x4B01:
time_base.den = get_be32(pb);
time_base.num = get_be32(pb);
break;
case 0x4803:
get_buffer(pb, sequence_uid, 16);
break;
case 0x3C0A:
get_buffer(pb, track_uid, 16);
break;
default:
url_fskip(pb, size);
}
bytes_read += size + 4;
}
for (i = 0; i < mxf->tracks_count; i++)
if (!memcmp(track_uid, mxf->tracks[i].track_uid, 16)) {
mxf->tracks[i].track_id = track_id;
mxf->tracks[i].track_number = track_number;
mxf->tracks[i].stream->time_base = time_base;
mxf->tracks[i].stream->id = track_number;
memcpy(mxf->tracks[i].sequence_uid, sequence_uid, 16);
}
return bytes_read;
}
static int mxf_read_metadata_sequence(MXFContext *mxf, KLVPacket *klv)
{
ByteIOContext *pb = &mxf->fc->pb;
uint8_t sequence_uid[16];
uint8_t data_definition[16];
uint64_t duration = 0;
int bytes_read = 0;
int i;
while (bytes_read < klv->length) {
int tag = get_be16(pb);
int size = get_be16(pb); /* KLV specified by 0x53 */
switch (tag) {
case 0x3C0A:
get_buffer(pb, sequence_uid, 16);
break;
case 0x0202:
duration = get_be64(pb);
break;
case 0x0201:
get_buffer(pb, data_definition, 16);
break;
default:
url_fskip(pb, size);
}
bytes_read += size + 4;
}
for (i = 0; i < mxf->tracks_count; i++)
if (!memcmp(sequence_uid, mxf->tracks[i].sequence_uid, 16)) {
mxf->tracks[i].stream->duration = duration;
if (data_definition[11] == 0x02 && data_definition[12] == 0x01)
mxf->tracks[i].stream->codec->codec_type = CODEC_TYPE_VIDEO;
else if (data_definition[11] == 0x02 && data_definition[12] == 0x02)
mxf->tracks[i].stream->codec->codec_type = CODEC_TYPE_AUDIO;
else if (data_definition[11] == 0x01) /* SMPTE 12M Time Code track */
mxf->tracks[i].stream->codec->codec_type = CODEC_TYPE_DATA;
}
return bytes_read;
}
static int mxf_read_metadata_source_package(MXFContext *mxf, KLVPacket *klv)
{
ByteIOContext *pb = &mxf->fc->pb;
int tracks_count;
int bytes_read = 0;
int i;
while (bytes_read < klv->length) {
int tag = get_be16(pb);
int size = get_be16(pb); /* KLV specified by 0x53 */
switch (tag) {
case 0x4403:
tracks_count = get_be32(pb);
if(tracks_count >= UINT_MAX / sizeof(*mxf->tracks) ||
tracks_count >= UINT_MAX / sizeof(*mxf->descriptors))
return -1;
mxf->tracks_count += tracks_count; /* op2a contains multiple source packages */
mxf->tracks = av_realloc(mxf->tracks, mxf->tracks_count * sizeof(*mxf->tracks));
mxf->descriptors = av_realloc(mxf->descriptors, mxf->tracks_count * sizeof(*mxf->descriptors));
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
for (i = mxf->tracks_count - tracks_count; i < mxf->tracks_count; i++) {
mxf->tracks[i].stream = av_new_stream(mxf->fc, 0);
get_buffer(pb, mxf->tracks[i].track_uid, 16);
}
break;
default:
url_fskip(pb, size);
}
bytes_read += size + 4;
}
return bytes_read;
}
static int mxf_read_metadata_descriptor(MXFContext *mxf, KLVPacket *klv)
{
ByteIOContext *pb = &mxf->fc->pb;
MXFDescriptor *desc;
int bytes_read = 0;
if (mxf->descriptors_count == mxf->tracks_count)
return -1;
desc = &mxf->descriptors[mxf->descriptors_count++];
desc->kind = klv->key[14];
desc->linked_track_id = -1;
while (bytes_read < klv->length) {
int tag = get_be16(pb);
int size = get_be16(pb); /* KLV specified by 0x53 */
switch (tag) {
case 0x3004:
get_buffer(pb, desc->essence_container, 16);
break;
case 0x3006:
desc->linked_track_id = get_be32(pb);
break;
case 0x3201: /* PictureEssenceCoding */
desc->codec_type = CODEC_TYPE_VIDEO;
get_buffer(pb, desc->essence_compression, 16);
break;
case 0x3203:
desc->width = get_be32(pb);
break;
case 0x3202:
desc->height = get_be32(pb);
break;
case 0x320E:
desc->aspect_ratio.num = get_be32(pb);
desc->aspect_ratio.den = get_be32(pb);
break;
case 0x3D0A:
desc->block_align = get_be16(pb);
break;
case 0x3D03:
desc->sample_rate.num = get_be32(pb);
desc->sample_rate.den = get_be32(pb);
break;
case 0x3D06: /* SoundEssenceCompression */
desc->codec_type = CODEC_TYPE_AUDIO;
get_buffer(pb, desc->essence_compression, 16);
break;
case 0x3D07:
desc->channels = get_be32(pb);
break;
case 0x3D01:
desc->bits_per_sample = get_be32(pb);
break;
default:
url_fskip(pb, size);
}
bytes_read += size + 4;
}
return bytes_read;
}
/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
static const CodecTag mxf_sound_essence_labels[] = {
{ CODEC_ID_PCM_S16LE, 0x01000000 },/* Uncompressed Sound Coding */
{ CODEC_ID_PCM_S16LE, 0x017F0000 },/* Uncompressed Sound Coding */
{ CODEC_ID_PCM_S16BE, 0x017E0000 },/* Uncompressed Sound Coding Big Endian*/
{ CODEC_ID_PCM_ALAW, 0x02030101 },
{ CODEC_ID_AC3, 0x02030201 },
//{ CODEC_ID_MP1, 0x02030104 },
{ CODEC_ID_MP2, 0x02030105 },/* MP2 or MP3 */
//{ CODEC_ID_MP2, 0x02030106 },/* MPEG-2 Layer 1 */
//{ CODEC_ID_???, 0x0203010C },/* Dolby E */
//{ CODEC_ID_???, 0x02030301 },/* MPEG-2 AAC */
{ 0, 0 },
};
static const CodecTag mxf_picture_essence_labels[] = {
{ CODEC_ID_RAWVIDEO, 0x0100 },
{ CODEC_ID_MPEG2VIDEO, 0x0201 },
{ CODEC_ID_DVVIDEO, 0x0202 },
//{ CODEC_ID_???, 0x0207 },/* D-11 HDCAM */
{ 0, 0 },
};
static const CodecTag mxf_container_picture_labels[] = {
{ CODEC_ID_MPEG2VIDEO, 0x0201 }, /* D-10 Mapping */
{ CODEC_ID_DVVIDEO, 0x0202 }, /* DV Mapping */
//{ CODEC_ID_???, 0x0203 }, /* HDCAM D-11 Mapping */
{ CODEC_ID_MPEG2VIDEO, 0x0204 }, /* MPEG ES Mapping */
};
static const CodecTag mxf_container_sound_labels[] = {
//{ CODEC_ID_PCM_S16??, 0x0201 }, /* D-10 Mapping */
{ CODEC_ID_MP2, 0x0204 }, /* MPEG ES Mapping */
{ CODEC_ID_PCM_S16LE, 0x0206 }, /* AES BWF Mapping */
{ CODEC_ID_PCM_ALAW, 0x020A },
{ 0, 0 },
};
static void mxf_resolve_track_descriptor(MXFContext *mxf)
{
uint32_t container_label;
uint32_t essence_label;
int i, j;
for (i = 0; i < mxf->descriptors_count; i++) {
for (j = 0; j < mxf->tracks_count; j++) {
AVStream *st = mxf->tracks[j].stream;
MXFDescriptor *desc = &mxf->descriptors[i];
if ((desc->linked_track_id == -1 && st->codec->codec_type == desc->codec_type)
|| desc->linked_track_id == mxf->tracks[j].track_id) {
if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
st->codec->channels = desc->channels;
st->codec->bits_per_sample = desc->bits_per_sample;
st->codec->block_align = desc->block_align;
st->codec->sample_rate = desc->sample_rate.num / desc->sample_rate.den;
container_label = BE_16(desc->essence_container + 12);
essence_label = BE_32(desc->essence_compression + 11);
st->codec->codec_id = codec_get_id(mxf_sound_essence_labels, essence_label);
if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
if (desc->bits_per_sample == 24)
st->codec->codec_id = CODEC_ID_PCM_S24LE;
else if (desc->bits_per_sample == 32)
st->codec->codec_id = CODEC_ID_PCM_S32LE;
}
if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
if (desc->bits_per_sample == 24)
st->codec->codec_id = CODEC_ID_PCM_S24BE;
else if (desc->bits_per_sample == 32)
st->codec->codec_id = CODEC_ID_PCM_S32BE;
}
if (!st->codec->codec_id)
st->codec->codec_id = codec_get_id(mxf_container_sound_labels, container_label);
} else if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
st->codec->width = desc->width;
st->codec->height = desc->height;
container_label = BE_16(desc->essence_container + 12);
essence_label = BE_16(desc->essence_compression + 11);
st->codec->codec_id = codec_get_id(mxf_picture_essence_labels, essence_label);
if (!st->codec->codec_id)
st->codec->codec_id = codec_get_id(mxf_container_picture_labels, container_label);
}
}
}
}
}
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
MXFContext *mxf = s->priv_data;
KLVPacket klv;
int ret = 0;
mxf->fc = s;
while (!url_feof(&s->pb)) {
if (klv_read_packet(&klv, &s->pb) < 0)
return -1;
if (IS_KLV_KEY(klv.key, mxf_metadata_track_key))
ret = mxf_read_metadata_track(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_source_package_key))
ret = mxf_read_metadata_source_package(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_sequence_key))
ret = mxf_read_metadata_sequence(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_wave_descriptor_key))
ret = mxf_read_metadata_descriptor(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_mpegvideo_descriptor_key))
ret = mxf_read_metadata_descriptor(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_cdci_descriptor_key))
ret = mxf_read_metadata_descriptor(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_generic_sound_descriptor_key))
ret = mxf_read_metadata_descriptor(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
/* FIXME avoid seek */
url_fseek(&s->pb, klv.offset, SEEK_SET);
break;
} else
url_fskip(&s->pb, klv.length);
if (ret < 0)
return ret;
}
mxf_resolve_track_descriptor(mxf);
return 0;
}
static int mxf_read_close(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
av_freep(&mxf->tracks);
av_freep(&mxf->descriptors);
return 0;
}
static int mxf_probe(AVProbeData *p) {
/* KLV packet describing MXF header partition pack */
if (p->buf_size < sizeof(mxf_header_partition_pack_key))
return 0;
if (IS_KLV_KEY(p->buf, mxf_header_partition_pack_key))
return AVPROBE_SCORE_MAX;
else
return 0;
}
AVInputFormat mxf_demuxer = {
"mxf",
"MXF format",
sizeof(MXFContext),
mxf_probe,
mxf_read_header,
mxf_read_packet,
mxf_read_close,
NULL,
};