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FFmpeg/libavformat/mxf.c

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/*
* 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 contains tracks with reference to SourcePackage tracks.
* Search for Descriptors (Picture, Sound) which contains codec info and parameters.
* Assign Descriptors to correct Tracks.
*
* Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) and then resolve Strong Reference from another object.
* Returns -1 if Strong Reference could not be resolved.
*
* Simple demuxer, only OP1A supported and some files might not work at all.
* Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
* Only descriptors with EssenceSoundCompression or PictureEssenceCoding will be taken into account. "D/req" SMPTE 377M
*/
//#define DEBUG
#include "avformat.h"
typedef uint8_t UID[16];
enum MXFPackageType {
MaterialPackage,
SourcePackage,
};
enum MXFStructuralComponentType {
Timecode,
SourceClip,
};
typedef struct MXFStructuralComponent {
UID uid;
UID source_package_uid;
UID data_definition_ul;
int64_t duration;
int64_t start_position;
int source_track_id;
enum MXFStructuralComponentType type;
} MXFStructuralComponent;
typedef struct MXFSequence {
UID uid;
UID data_definition_ul;
MXFStructuralComponent **structural_components;
UID *structural_components_refs;
int structural_components_count;
int64_t duration;
} MXFSequence;
typedef struct MXFTrack {
UID uid;
MXFSequence *sequence; /* mandatory, and only one */
UID sequence_ref;
int track_id;
uint8_t track_number[4];
AVRational edit_rate;
} MXFTrack;
typedef struct MXFDescriptor {
UID uid;
UID essence_container_ul;
UID essence_codec_ul;
AVRational sample_rate;
AVRational aspect_ratio;
int width;
int height;
int channels;
int bits_per_sample;
struct MXFDescriptor **sub_descriptors;
UID *sub_descriptors_refs;
int sub_descriptors_count;
int linked_track_id;
} MXFDescriptor;
typedef struct MXFPackage {
UID uid;
UID package_uid;
MXFTrack **tracks;
UID *tracks_refs;
int tracks_count;
MXFDescriptor *descriptor; /* only one */
UID descriptor_ref;
enum MXFPackageType type;
} MXFPackage;
typedef struct MXFEssenceContainerData {
UID uid;
UID linked_package_uid;
} MXFEssenceContainerData;
typedef struct MXFContext {
MXFPackage **packages;
UID *packages_refs;
int packages_count;
MXFEssenceContainerData **essence_container_data_sets;
UID *essence_container_data_sets_refs;
int essence_container_data_sets_count;
UID *essence_containers_uls; /* Universal Labels SMPTE RP224 */
int essence_containers_uls_count;
UID operational_pattern_ul;
UID content_storage_uid;
AVFormatContext *fc;
} MXFContext;
typedef struct KLVPacket {
UID key;
offset_t offset;
uint64_t length;
} KLVPacket;
typedef struct MXFCodecUL {
UID uid;
enum CodecID id;
} MXFCodecUL;
static const UID mxf_metadata_preface_key = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2F,0x00 };
static const UID mxf_metadata_content_storage_key = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 };
static const UID mxf_metadata_source_package_key = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 };
static const UID mxf_metadata_material_package_key = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 };
static const UID mxf_metadata_sequence_key = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 };
static const UID mxf_metadata_source_clip_key = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 };
static const UID mxf_metadata_multiple_descriptor_key = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 };
static const UID mxf_metadata_generic_sound_descriptor_key = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 };
static const UID mxf_metadata_cdci_descriptor_key = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 };
static const UID mxf_metadata_mpegvideo_descriptor_key = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 };
static const UID mxf_metadata_wave_descriptor_key = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 };
static const UID mxf_metadata_static_track_key = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 };
static const UID mxf_metadata_track_key = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3b,0x00 };
/* partial keys to match */
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,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
#define PRINT_KEY(x) dprintf("%02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n", \
x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7], x[8], x[9], x[10], x[11], x[12], x[13], x[14], x[15])
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);
return klv->length == -1 ? -1 : 0;
}
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
{
int i;
for (i = 0; i < s->nb_streams; i++) {
MXFTrack *track = s->streams[i]->priv_data;
/* SMPTE 379M 7.3 */
if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
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) {
av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
return -1;
}
#ifdef DEBUG
PRINT_KEY(klv.key);
#endif
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);
return pkt->stream_index == -1 ? -1 : 0;
} else
url_fskip(&s->pb, klv.length);
}
return AVERROR_IO;
}
static int mxf_read_metadata_preface(MXFContext *mxf, KLVPacket *klv)
{
ByteIOContext *pb = &mxf->fc->pb;
int bytes_read = 0;
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 0x3B03:
get_buffer(pb, mxf->content_storage_uid, 16);
break;
case 0x3B09:
get_buffer(pb, mxf->operational_pattern_ul, 16);
break;
case 0x3B0A:
mxf->essence_containers_uls_count = get_be32(pb);
if (mxf->essence_containers_uls_count >= UINT_MAX / sizeof(UID))
return -1;
mxf->essence_containers_uls = av_malloc(mxf->essence_containers_uls_count * sizeof(UID));
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
get_buffer(pb, mxf->essence_containers_uls, mxf->essence_containers_uls_count * sizeof(UID));
break;
default:
url_fskip(pb, size);
}
bytes_read += size + 4;
}
return 0;
}
static int mxf_read_metadata_content_storage(MXFContext *mxf, KLVPacket *klv)
{
ByteIOContext *pb = &mxf->fc->pb;
int bytes_read = 0;
while (bytes_read < klv->length) {
int tag = get_be16(pb);
int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
dprintf("tag 0x%04X, size %d\n", tag, size);
switch (tag) {
case 0x1901:
mxf->packages_count = get_be32(pb);
if (mxf->packages_count >= UINT_MAX / sizeof(UID) ||
mxf->packages_count >= UINT_MAX / sizeof(*mxf->packages))
return -1;
mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
mxf->packages = av_mallocz(mxf->packages_count * sizeof(*mxf->packages));
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
get_buffer(pb, mxf->packages_refs, mxf->packages_count * sizeof(UID));
break;
case 0x1902:
mxf->essence_container_data_sets_count = get_be32(pb);
if (mxf->essence_container_data_sets_count >= UINT_MAX / sizeof(UID) ||
mxf->essence_container_data_sets_count >= UINT_MAX / sizeof(*mxf->essence_container_data_sets))
return -1;
mxf->essence_container_data_sets_refs = av_malloc(mxf->essence_container_data_sets_count * sizeof(UID));
mxf->essence_container_data_sets = av_mallocz(mxf->essence_container_data_sets_count * sizeof(*mxf->essence_container_data_sets));
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
get_buffer(pb, mxf->essence_container_data_sets_refs, mxf->essence_container_data_sets_count * sizeof(UID));
break;
default:
url_fskip(pb, size);
}
bytes_read += size + 4;
}
return 0;
}
static int mxf_read_metadata_source_clip(MXFContext *mxf, KLVPacket *klv)
{
ByteIOContext *pb = &mxf->fc->pb;
MXFStructuralComponent *source_clip = av_mallocz(sizeof(*source_clip));
int bytes_read = 0;
int i, j, k;
source_clip->type = SourceClip;
while (bytes_read < klv->length) {
int tag = get_be16(pb);
int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
dprintf("tag 0x%04X, size %d\n", tag, size);
switch (tag) {
case 0x3C0A:
get_buffer(pb, source_clip->uid, 16);
break;
case 0x0202:
source_clip->duration = get_be64(pb);
break;
case 0x1201:
source_clip->start_position = get_be64(pb);
break;
case 0x1101:
/* UMID, only get last 16 bytes */
url_fskip(pb, 16);
get_buffer(pb, source_clip->source_package_uid, 16);
break;
case 0x1102:
source_clip->source_track_id = get_be32(pb);
break;
default:
url_fskip(pb, size);
}
bytes_read += size + 4;
}
for (i = 0; i < mxf->packages_count; i++) {
if (mxf->packages[i]) {
for (j = 0; j < mxf->packages[i]->tracks_count; j++) {
if (mxf->packages[i]->tracks[j] && mxf->packages[i]->tracks[j]->sequence) {
for (k = 0; k < mxf->packages[i]->tracks[j]->sequence->structural_components_count; k++) {
if (!memcmp(mxf->packages[i]->tracks[j]->sequence->structural_components_refs[k], source_clip->uid, 16)) {
mxf->packages[i]->tracks[j]->sequence->structural_components[k] = source_clip;
return 0;
}
}
}
}
}
}
return -1;
}
static int mxf_read_metadata_material_package(MXFContext *mxf, KLVPacket *klv)
{
ByteIOContext *pb = &mxf->fc->pb;
MXFPackage *package = av_mallocz(sizeof(*package));
int bytes_read = 0;
int i;
package->type = MaterialPackage;
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, package->uid, 16);
break;
case 0x4403:
package->tracks_count = get_be32(pb);
if (package->tracks_count >= UINT_MAX / sizeof(UID) ||
package->tracks_count >= UINT_MAX / sizeof(*package->tracks))
return -1;
package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
package->tracks = av_mallocz(package->tracks_count * sizeof(*package->tracks));
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
get_buffer(pb, package->tracks_refs, package->tracks_count * sizeof(UID));
break;
default:
url_fskip(pb, size);
}
bytes_read += size + 4;
}
for (i = 0; i < mxf->packages_count; i++) {
if (!memcmp(mxf->packages_refs[i], package->uid, 16)) {
mxf->packages[i] = package;
return 0;
}
}
return -1;
}
static int mxf_read_metadata_track(MXFContext *mxf, KLVPacket *klv)
{
ByteIOContext *pb = &mxf->fc->pb;
MXFTrack *track = av_mallocz(sizeof(*track));
int bytes_read = 0;
int i, j;
while (bytes_read < klv->length) {
int tag = get_be16(pb);
int size = get_be16(pb); /* KLV specified by 0x53 */
dprintf("tag 0x%04X, size %d\n", tag, size);
switch (tag) {
case 0x3C0A:
get_buffer(pb, track->uid, 16);
break;
case 0x4801:
track->track_id = get_be32(pb);
break;
case 0x4804:
get_buffer(pb, track->track_number, 4);
break;
case 0x4B01:
track->edit_rate.den = get_be32(pb);
track->edit_rate.num = get_be32(pb);
break;
case 0x4803:
get_buffer(pb, track->sequence_ref, 16);
break;
default:
url_fskip(pb, size);
}
bytes_read += size + 4;
}
for (i = 0; i < mxf->packages_count; i++) {
if (mxf->packages[i]) {
for (j = 0; j < mxf->packages[i]->tracks_count; j++) {
if (!memcmp(mxf->packages[i]->tracks_refs[j], track->uid, 16)) {
mxf->packages[i]->tracks[j] = track;
return 0;
}
}
}
}
return -1;
}
static int mxf_read_metadata_sequence(MXFContext *mxf, KLVPacket *klv)
{
ByteIOContext *pb = &mxf->fc->pb;
MXFSequence *sequence = av_mallocz(sizeof(*sequence));
int bytes_read = 0;
int i, j;
while (bytes_read < klv->length) {
int tag = get_be16(pb);
int size = get_be16(pb); /* KLV specified by 0x53 */
dprintf("tag 0x%04X, size %d\n", tag, size);
switch (tag) {
case 0x3C0A:
get_buffer(pb, sequence->uid, 16);
break;
case 0x0202:
sequence->duration = get_be64(pb);
break;
case 0x0201:
get_buffer(pb, sequence->data_definition_ul, 16);
break;
case 0x1001:
sequence->structural_components_count = get_be32(pb);
if (sequence->structural_components_count >= UINT_MAX / sizeof(UID) ||
sequence->structural_components_count >= UINT_MAX / sizeof(*sequence->structural_components))
return -1;
sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
sequence->structural_components = av_mallocz(sequence->structural_components_count * sizeof(*sequence->structural_components));
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
get_buffer(pb, sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
break;
default:
url_fskip(pb, size);
}
bytes_read += size + 4;
}
for (i = 0; i < mxf->packages_count; i++) {
if (mxf->packages[i]) {
for (j = 0; j < mxf->packages[i]->tracks_count; j++) {
if (mxf->packages[i]->tracks[j]) {
if (!memcmp(mxf->packages[i]->tracks[j]->sequence_ref, sequence->uid, 16)) {
mxf->packages[i]->tracks[j]->sequence = sequence;
return 0;
}
}
}
}
}
return -1;
}
static int mxf_read_metadata_source_package(MXFContext *mxf, KLVPacket *klv)
{
ByteIOContext *pb = &mxf->fc->pb;
MXFPackage *package = av_mallocz(sizeof(*package));
int bytes_read = 0;
int i;
package->type = SourcePackage;
while (bytes_read < klv->length) {
int tag = get_be16(pb);
int size = get_be16(pb); /* KLV specified by 0x53 */
dprintf("tag 0x%04X, size %d\n", tag, size);
switch (tag) {
case 0x3C0A:
get_buffer(pb, package->uid, 16);
break;
case 0x4403:
package->tracks_count = get_be32(pb);
if (package->tracks_count >= UINT_MAX / sizeof(UID) ||
package->tracks_count >= UINT_MAX / sizeof(*package->tracks))
return -1;
package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
package->tracks = av_mallocz(package->tracks_count * sizeof(*package->tracks));
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
get_buffer(pb, package->tracks_refs, package->tracks_count * sizeof(UID));
break;
case 0x4401:
/* UMID, only get last 16 bytes */
url_fskip(pb, 16);
get_buffer(pb, package->package_uid, 16);
break;
case 0x4701:
get_buffer(pb, package->descriptor_ref, 16);
break;
default:
url_fskip(pb, size);
}
bytes_read += size + 4;
}
for (i = 0; i < mxf->packages_count; i++) {
if (!memcmp(mxf->packages_refs[i], package->uid, 16)) {
mxf->packages[i] = package;
return 0;
}
}
return -1;
}
static int mxf_read_metadata_multiple_descriptor(MXFContext *mxf, KLVPacket *klv)
{
ByteIOContext *pb = &mxf->fc->pb;
MXFDescriptor *descriptor = av_mallocz(sizeof(*descriptor));
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 */
dprintf("tag 0x%04X, size %d\n", tag, size);
switch (tag) {
case 0x3C0A:
get_buffer(pb, descriptor->uid, 16);
break;
case 0x3F01:
descriptor->sub_descriptors_count = get_be32(pb);
if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID) ||
descriptor->sub_descriptors_count >= UINT_MAX / sizeof(*descriptor->sub_descriptors))
return -1;
descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
descriptor->sub_descriptors = av_mallocz(descriptor->sub_descriptors_count * sizeof(*descriptor->sub_descriptors));
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
get_buffer(pb, descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
break;
default:
url_fskip(pb, size);
}
bytes_read += size + 4;
}
for (i = 0; i < mxf->packages_count; i++) {
if (mxf->packages[i]) {
if (!memcmp(mxf->packages[i]->descriptor_ref, descriptor->uid, 16)) {
mxf->packages[i]->descriptor = descriptor;
return 0;
}
}
}
return -1;
}
static int mxf_read_metadata_generic_descriptor(MXFContext *mxf, KLVPacket *klv)
{
ByteIOContext *pb = &mxf->fc->pb;
MXFDescriptor *descriptor = av_mallocz(sizeof(*descriptor));
int bytes_read = 0;
int i, j;
while (bytes_read < klv->length) {
int tag = get_be16(pb);
int size = get_be16(pb); /* KLV specified by 0x53 */
dprintf("tag 0x%04X, size %d\n", tag, size);
switch (tag) {
case 0x3C0A:
get_buffer(pb, descriptor->uid, 16);
break;
case 0x3004:
get_buffer(pb, descriptor->essence_container_ul, 16);
break;
case 0x3006:
descriptor->linked_track_id = get_be32(pb);
break;
case 0x3201: /* PictureEssenceCoding */
get_buffer(pb, descriptor->essence_codec_ul, 16);
break;
case 0x3203:
descriptor->width = get_be32(pb);
break;
case 0x3202:
descriptor->height = get_be32(pb);
break;
case 0x320E:
descriptor->aspect_ratio.num = get_be32(pb);
descriptor->aspect_ratio.den = get_be32(pb);
break;
case 0x3D03:
descriptor->sample_rate.num = get_be32(pb);
descriptor->sample_rate.den = get_be32(pb);
break;
case 0x3D06: /* SoundEssenceCompression */
get_buffer(pb, descriptor->essence_codec_ul, 16);
break;
case 0x3D07:
descriptor->channels = get_be32(pb);
break;
case 0x3D01:
descriptor->bits_per_sample = get_be32(pb);
break;
default:
url_fskip(pb, size);
}
bytes_read += size + 4;
}
for (i = 0; i < mxf->packages_count; i++) {
if (mxf->packages[i]) {
if (!memcmp(mxf->packages[i]->descriptor_ref, descriptor->uid, 16)) {
mxf->packages[i]->descriptor = descriptor;
return 0;
} else if (mxf->packages[i]->descriptor) { /* MultipleDescriptor */
for (j = 0; j < mxf->packages[i]->descriptor->sub_descriptors_count; j++) {
if (!memcmp(mxf->packages[i]->descriptor->sub_descriptors_refs[j], descriptor->uid, 16)) {
mxf->packages[i]->descriptor->sub_descriptors[j] = descriptor;
return 0;
}
}
}
}
}
return -1;
}
/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
static const UID picture_essence_track_ul = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 };
static const UID sound_essence_track_ul = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 };
static const MXFCodecUL mxf_codec_uls[] = {
/* PictureEssenceCoding */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, CODEC_ID_MPEG2VIDEO }, /* I-Frame */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO }, /* Long GoP */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO }, /* Long GoP */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 }, CODEC_ID_MPEG2VIDEO }, /* D-10 30Mbps PAL */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO }, /* D-10 50Mbps PAL */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 }, CODEC_ID_DVVIDEO }, /* DVCPRO50 PAL */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 }, CODEC_ID_DVVIDEO }, /* DVCPRO25 PAL */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 }, CODEC_ID_DVVIDEO }, /* DV25 IEC PAL */
/* SoundEssenceCompression */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 }, CODEC_ID_PCM_S16LE },
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x02,0x02,0x01,0x7E,0x00,0x00,0x00 }, CODEC_ID_PCM_S16BE }, /* From Omneon MXF file */
};
static enum CodecID mxf_get_codec_id(const MXFCodecUL *uls, UID *uid)
{
while (uls->id != CODEC_ID_NONE) {
if(!memcmp(uls->uid, *uid, 16))
return uls->id;
uls++;
}
return CODEC_ID_NONE;
}
static int mxf_parse_structural_metadata(MXFContext *mxf)
{
MXFPackage *material_package = NULL;
MXFPackage *source_package = NULL;
int i, j, k;
/* TODO: handle multiple material packages (OP3x) */
for (i = 0; i < mxf->packages_count; i++) {
if (mxf->packages[i]->type == MaterialPackage) {
material_package = mxf->packages[i];
break;
}
}
if (!material_package) {
av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
return -1;
}
for (i = 0; i < material_package->tracks_count; i++) {
MXFTrack *material_track = material_package->tracks[i];
MXFTrack *source_track = NULL;
MXFDescriptor *descriptor = NULL;
MXFStructuralComponent *component = NULL;
AVStream *st;
/* TODO: handle multiple source clips */
for (j = 0; j < material_track->sequence->structural_components_count; j++) {
component = material_track->sequence->structural_components[j];
/* TODO: handle timecode component */
if (!component || component->type != SourceClip)
continue;
for (k = 0; k < mxf->packages_count; k++) {
if (!memcmp(mxf->packages[k]->package_uid, component->source_package_uid, 16)) {
source_package = mxf->packages[k];
break;
}
}
if (!source_package) {
av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
break;
}
for (k = 0; k < source_package->tracks_count; k++) {
if (source_package->tracks[k]->track_id == component->source_track_id) {
source_track = source_package->tracks[k];
break;
}
}
if (!source_track) {
av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
break;
}
}
if (!source_track)
continue;
st = av_new_stream(mxf->fc, source_track->track_id);
st->priv_data = source_track;
st->duration = component->duration;
if (st->duration == -1)
st->duration = AV_NOPTS_VALUE;
st->start_time = component->start_position;
av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
#ifdef DEBUG
PRINT_KEY(source_track->sequence->data_definition_ul);
#endif
if (!memcmp(source_track->sequence->data_definition_ul, picture_essence_track_ul, 16))
st->codec->codec_type = CODEC_TYPE_VIDEO;
else if (!memcmp(source_track->sequence->data_definition_ul, sound_essence_track_ul, 16))
st->codec->codec_type = CODEC_TYPE_AUDIO;
else
st->codec->codec_type = CODEC_TYPE_DATA;
if (source_package->descriptor) {
if (source_package->descriptor->sub_descriptors_count > 0) { /* SourcePackage has MultipleDescriptor */
for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
if (source_package->descriptor->sub_descriptors[j]) {
if (source_package->descriptor->sub_descriptors[j]->linked_track_id == source_track->track_id) {
descriptor = source_package->descriptor->sub_descriptors[j];
break;
}
}
}
} else {
descriptor = source_package->descriptor;
}
}
if (!descriptor) {
av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
continue;
}
#ifdef DEBUG
PRINT_KEY(descriptor->essence_codec_ul);
#endif
st->codec->codec_id = mxf_get_codec_id(mxf_codec_uls, &descriptor->essence_codec_ul);
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
st->codec->width = descriptor->width;
st->codec->height = descriptor->height;
} else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
st->codec->channels = descriptor->channels;
st->codec->bits_per_sample = descriptor->bits_per_sample;
st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
/* TODO: implement CODEC_ID_RAWAUDIO */
if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
if (descriptor->bits_per_sample == 24)
st->codec->codec_id = CODEC_ID_PCM_S24LE;
else if (descriptor->bits_per_sample == 32)
st->codec->codec_id = CODEC_ID_PCM_S32LE;
} else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
if (descriptor->bits_per_sample == 24)
st->codec->codec_id = CODEC_ID_PCM_S24BE;
else if (descriptor->bits_per_sample == 32)
st->codec->codec_id = CODEC_ID_PCM_S32BE;
}
}
}
return 0;
}
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) {
av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
return -1;
}
#ifdef DEBUG
PRINT_KEY(klv.key);
#endif
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_static_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_material_package_key))
ret = mxf_read_metadata_material_package(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_source_clip_key))
ret = mxf_read_metadata_source_clip(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_multiple_descriptor_key))
ret = mxf_read_metadata_multiple_descriptor(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_wave_descriptor_key))
ret = mxf_read_metadata_generic_descriptor(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_mpegvideo_descriptor_key))
ret = mxf_read_metadata_generic_descriptor(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_cdci_descriptor_key))
ret = mxf_read_metadata_generic_descriptor(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_generic_sound_descriptor_key))
ret = mxf_read_metadata_generic_descriptor(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_preface_key))
ret = mxf_read_metadata_preface(mxf, &klv);
else if (IS_KLV_KEY(klv.key, mxf_metadata_content_storage_key))
ret = mxf_read_metadata_content_storage(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) {
av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
return ret;
}
}
return mxf_parse_structural_metadata(mxf);
}
static int mxf_read_close(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
int i, j, k;
for (i = 0; i < mxf->packages_count; i++) {
for (j = 0; j < mxf->packages[i]->tracks_count; j++) {
for (k = 0; k < mxf->packages[i]->tracks[j]->sequence->structural_components_count; k++)
av_freep(&mxf->packages[i]->tracks[j]->sequence->structural_components[k]);
av_freep(&mxf->packages[i]->tracks[j]->sequence->structural_components_refs);
av_freep(&mxf->packages[i]->tracks[j]->sequence->structural_components);
av_freep(&mxf->packages[i]->tracks[j]->sequence);
av_freep(&mxf->packages[i]->tracks[j]);
}
av_freep(&mxf->packages[i]->tracks_refs);
av_freep(&mxf->packages[i]->tracks);
if (mxf->packages[i]->descriptor) {
for (k = 0; k < mxf->packages[i]->descriptor->sub_descriptors_count; k++)
av_freep(&mxf->packages[i]->descriptor->sub_descriptors[k]);
av_freep(&mxf->packages[i]->descriptor->sub_descriptors_refs);
av_freep(&mxf->packages[i]->descriptor->sub_descriptors);
}
av_freep(&mxf->packages[i]->descriptor);
av_freep(&mxf->packages[i]);
}
av_freep(&mxf->packages_refs);
av_freep(&mxf->packages);
for (i = 0; i < mxf->essence_container_data_sets_count; i++)
av_freep(&mxf->essence_container_data_sets[i]);
av_freep(&mxf->essence_container_data_sets_refs);
av_freep(&mxf->essence_container_data_sets);
av_freep(&mxf->essence_containers_uls);
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,
};