diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/mxf.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/mxf.c | 1082 |
1 files changed, 1082 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavformat/mxf.c b/contrib/ffmpeg/libavformat/mxf.c new file mode 100644 index 000000000..b20679943 --- /dev/null +++ b/contrib/ffmpeg/libavformat/mxf.c @@ -0,0 +1,1082 @@ +/* + * MXF demuxer. + * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>. + * + * This file is part of FFmpeg. + * + * FFmpeg 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 2.1 of the License, or (at your option) any later version. + * + * FFmpeg 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 FFmpeg; 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) then add MetaDataSet to MXFContext. + * Metadata parsing resolves Strong References to objects. + * + * 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 + */ + +//#define DEBUG + +#include "avformat.h" + +typedef uint8_t UID[16]; + +enum MXFMetadataSetType { + MaterialPackage, + SourcePackage, + SourceClip, + TimecodeComponent, + Sequence, + MultipleDescriptor, + Descriptor, + Track, + EssenceContainerData, +}; + +typedef struct MXFStructuralComponent { + UID uid; + enum MXFMetadataSetType type; + UID source_package_uid; + UID data_definition_ul; + int64_t duration; + int64_t start_position; + int source_track_id; +} MXFStructuralComponent; + +typedef struct MXFSequence { + UID uid; + enum MXFMetadataSetType type; + UID data_definition_ul; + UID *structural_components_refs; + int structural_components_count; + int64_t duration; +} MXFSequence; + +typedef struct MXFTrack { + UID uid; + enum MXFMetadataSetType type; + 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; + enum MXFMetadataSetType type; + UID essence_container_ul; + UID essence_codec_ul; + AVRational sample_rate; + AVRational aspect_ratio; + int width; + int height; + int channels; + int bits_per_sample; + UID *sub_descriptors_refs; + int sub_descriptors_count; + int linked_track_id; + uint8_t *extradata; + int extradata_size; +} MXFDescriptor; + +typedef struct MXFPackage { + UID uid; + enum MXFMetadataSetType type; + UID package_uid; + UID *tracks_refs; + int tracks_count; + MXFDescriptor *descriptor; /* only one */ + UID descriptor_ref; +} MXFPackage; + +typedef struct MXFEssenceContainerData { + UID uid; + enum MXFMetadataSetType type; + UID linked_package_uid; +} MXFEssenceContainerData; + +typedef struct { + UID uid; + enum MXFMetadataSetType type; +} MXFMetadataSet; + +typedef struct MXFContext { + UID *packages_refs; + int packages_count; + 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; + MXFMetadataSet **metadata_sets; + int metadata_sets_count; + AVFormatContext *fc; +} MXFContext; + +typedef struct KLVPacket { + UID key; + offset_t offset; + uint64_t length; +} KLVPacket; + +enum MXFWrappingScheme { + Frame, + Clip, +}; + +typedef struct MXFCodecUL { + UID uid; + enum CodecID id; + enum MXFWrappingScheme wrapping; +} MXFCodecUL; + +typedef struct MXFDataDefinitionUL { + UID uid; + enum CodecType type; +} MXFDataDefinitionUL; + +typedef struct MXFMetadataReadTableEntry { + const UID key; + int (*read)(MXFContext *mxf, KLVPacket *klv); +} MXFMetadataReadTableEntry; + +/* 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(s, x) dprintf("%s %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n", s, \ + (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 0 if only one stream, for OP Atom files with 0 as track number */ + return s->nb_streams == 1 ? 0 : -1; +} + +/* XXX: use AVBitStreamFilter */ +static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length) +{ + uint8_t buffer[61444]; + uint8_t *buf_ptr, *end_ptr, *data_ptr; + + if (length > 61444) /* worst case PAL 1920 samples 8 channels */ + return -1; + get_buffer(pb, buffer, length); + av_new_packet(pkt, length); + data_ptr = pkt->data; + end_ptr = buffer + length; + buf_ptr = buffer + 4; /* skip SMPTE 331M header */ + for (; buf_ptr < end_ptr; buf_ptr += 4) { + if (st->codec->bits_per_sample == 24) { + data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4); + data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4); + data_ptr[2] = (buf_ptr[0] >> 4) | ((buf_ptr[1] & 0x0f) << 4); + data_ptr += 3; + } else { + data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4); + data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4); + data_ptr += 2; + } + } + pkt->size = data_ptr - pkt->data; + return 0; +} + +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("read packet", klv.key); +#endif + if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) { + int index = mxf_get_stream_index(s, &klv); + if (index < 0) { + av_log(s, AV_LOG_ERROR, "error getting stream index\n"); + url_fskip(&s->pb, klv.length); + return -1; + } + /* check for 8 channels AES3 element */ + if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) { + if (mxf_get_d10_aes3_packet(&s->pb, s->streams[index], pkt, klv.length) < 0) { + av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n"); + return -1; + } + } else + av_get_packet(&s->pb, pkt, klv.length); + pkt->stream_index = index; + return 0; + } else + url_fskip(&s->pb, klv.length); + } + return AVERROR_IO; +} + +static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set) +{ + mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets)); + mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set; + mxf->metadata_sets_count++; + return 0; +} + +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, (uint8_t *)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)) + return -1; + mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID)); + url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ + get_buffer(pb, (uint8_t *)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)) + return -1; + mxf->essence_container_data_sets_refs = av_malloc(mxf->essence_container_data_sets_count * sizeof(UID)); + url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ + get_buffer(pb, (uint8_t *)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; + + while (bytes_read < klv->length) { + int tag = get_be16(pb); + int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */ + + bytes_read += size + 4; + dprintf("tag 0x%04X, size %d\n", tag, size); + if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */ + av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag); + continue; + } + 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); + } + } + source_clip->type = SourceClip; + return mxf_add_metadata_set(mxf, source_clip); +} + +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; + + 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)) + return -1; + package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID)); + url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ + get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID)); + break; + default: + url_fskip(pb, size); + } + bytes_read += size + 4; + } + package->type = MaterialPackage; + return mxf_add_metadata_set(mxf, package); +} + +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; + + 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; + } + track->type = Track; + return mxf_add_metadata_set(mxf, track); +} + +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; + + 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)) + return -1; + sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID)); + url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ + get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID)); + break; + default: + url_fskip(pb, size); + } + bytes_read += size + 4; + } + sequence->type = Sequence; + return mxf_add_metadata_set(mxf, sequence); +} + +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; + + 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)) + return -1; + package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID)); + url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ + get_buffer(pb, (uint8_t *)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; + } + package->type = SourcePackage; + return mxf_add_metadata_set(mxf, package); +} + +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; + + 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)) + return -1; + descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID)); + url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ + get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID)); + break; + default: + url_fskip(pb, size); + } + bytes_read += size + 4; + } + descriptor->type = MultipleDescriptor; + return mxf_add_metadata_set(mxf, descriptor); +} + +static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor) +{ + int code; + + do { + code = get_byte(pb); + dprintf("pixel layout: code 0x%x\n", code); + switch (code) { + case 0x52: /* R */ + descriptor->bits_per_sample += get_byte(pb); + break; + case 0x47: /* G */ + descriptor->bits_per_sample += get_byte(pb); + break; + case 0x42: /* B */ + descriptor->bits_per_sample += get_byte(pb); + break; + default: + get_byte(pb); + } + } while (code != 0); /* SMPTE 377M E.2.46 */ +} + +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; + + 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; + case 0x3401: + mxf_read_metadata_pixel_layout(pb, descriptor); + break; + case 0x8201: /* Private tag used by SONY C0023S01.mxf */ + descriptor->extradata = av_malloc(size); + descriptor->extradata_size = size; + get_buffer(pb, descriptor->extradata, size); + break; + default: + url_fskip(pb, size); + } + bytes_read += size + 4; + } + descriptor->type = Descriptor; + return mxf_add_metadata_set(mxf, descriptor); +} + +/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */ +static const MXFDataDefinitionUL mxf_data_definition_uls[] = { + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO }, + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO }, + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO }, + { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, CODEC_TYPE_DATA }, +}; + +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, Frame }, /* 422P@ML I-Frame */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL I-Frame */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL Long GoP */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML Long GoP */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 }, CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x04 }, CODEC_ID_MPEG4, Frame }, /* XDCAM Proxy C0023S01.mxf */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 30Mbps PAL */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 }, CODEC_ID_DVVIDEO, Frame }, /* DVCPRO50 PAL */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 }, CODEC_ID_DVVIDEO, Frame }, /* DVCPRO25 PAL */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 }, CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 }, CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */ + /* SoundEssenceCompression */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 }, CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 }, CODEC_ID_PCM_S16LE, Frame }, + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x02,0x02,0x01,0x7E,0x00,0x00,0x00 }, CODEC_ID_PCM_S16BE, Frame }, /* From Omneon MXF file */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 }, CODEC_ID_PCM_ALAW, Frame }, + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x04,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 }, CODEC_ID_PCM_ALAW, Frame }, /* XDCAM Proxy C0023S01.mxf */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 }, CODEC_ID_AC3, Frame }, + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 }, CODEC_ID_MP2, Frame }, /* MP2 or MP3 */ + //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 }, CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */ + { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, CODEC_ID_NONE, Frame }, +}; + +static const MXFCodecUL mxf_picture_essence_container_uls[] = { + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MPEG-ES Frame wrapped */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xe0,0x02 }, CODEC_ID_MPEG2VIDEO, Clip }, /* MPEG-ES Clip wrapped, 0xe0 MPV stream id */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x04,0x61,0x07 }, CODEC_ID_MPEG2VIDEO, Clip }, /* MPEG-ES Custom wrapped, 0x61 ??? stream id */ + { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, CODEC_ID_NONE, Frame }, +}; + +static const MXFCodecUL mxf_sound_essence_container_uls[] = { + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 }, CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x01 }, CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0xc0 MPA stream id */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x02 }, CODEC_ID_MP2, Clip }, /* MPEG-ES Clip wrapped, 0xc0 MPA stream id */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 }, CODEC_ID_PCM_S16BE, Frame }, /* D-10 Mapping 30Mbps PAL Extended Template */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, CODEC_ID_PCM_S16BE, Frame }, /* D-10 Mapping 50Mbps PAL Extended Template */ + { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, CODEC_ID_NONE, Frame }, +}; + +static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid) +{ + while (uls->id != CODEC_ID_NONE) { + if(!memcmp(uls->uid, *uid, 16)) + break; + uls++; + } + return uls; +} + +static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid) +{ + while (uls->type != CODEC_TYPE_DATA) { + if(!memcmp(uls->uid, *uid, 16)) + break; + uls++; + } + return uls->type; +} + +static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref) +{ + int i; + + if (!strong_ref) + return NULL; + for (i = 0; i < mxf->metadata_sets_count; i++) { + if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16)) { + return mxf->metadata_sets[i]; + } + } + return NULL; +} + +static int mxf_parse_structural_metadata(MXFContext *mxf) +{ + MXFPackage *material_package = NULL; + MXFPackage *temp_package = NULL; + int i, j, k; + + dprintf("metadata sets count %d\n", mxf->metadata_sets_count); + /* TODO: handle multiple material packages (OP3x) */ + for (i = 0; i < mxf->packages_count; i++) { + if (!(temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i]))) { + av_log(mxf->fc, AV_LOG_ERROR, "could not resolve package strong ref\n"); + return -1; + } + if (temp_package->type == MaterialPackage) { + material_package = temp_package; + 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++) { + MXFPackage *source_package = NULL; + MXFTrack *material_track = NULL; + MXFTrack *source_track = NULL; + MXFTrack *temp_track = NULL; + MXFDescriptor *descriptor = NULL; + MXFStructuralComponent *component = NULL; + const MXFCodecUL *codec_ul = NULL; + const MXFCodecUL *container_ul = NULL; + AVStream *st; + + if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i]))) { + av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n"); + continue; + } + + if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref))) { + av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n"); + return -1; + } + + /* TODO: handle multiple source clips */ + for (j = 0; j < material_track->sequence->structural_components_count; j++) { + /* TODO: handle timecode component */ + component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j]); + if (!component || component->type != SourceClip) + continue; + + for (k = 0; k < mxf->packages_count; k++) { + if (!(temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k]))) { + av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n"); + return -1; + } + if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) { + source_package = temp_package; + 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 (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k]))) { + av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n"); + return -1; + } + if (temp_track->track_id == component->source_track_id) { + source_track = temp_track; + 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); + + if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref))) { + av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n"); + return -1; + } + +#ifdef DEBUG + PRINT_KEY("data definition ul", source_track->sequence->data_definition_ul); +#endif + st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul); + + source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref); + if (source_package->descriptor) { + if (source_package->descriptor->type == MultipleDescriptor) { + for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) { + MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j]); + + if (!sub_descriptor) { + av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n"); + continue; + } + if (sub_descriptor->linked_track_id == source_track->track_id) { + descriptor = sub_descriptor; + 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("essence codec ul", descriptor->essence_codec_ul); + PRINT_KEY("essence container ul", descriptor->essence_container_ul); +#endif + /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */ + codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul); + st->codec->codec_id = codec_ul->id; + if (descriptor->extradata) { + st->codec->extradata = descriptor->extradata; + st->codec->extradata_size = descriptor->extradata_size; + } + if (st->codec->codec_type == CODEC_TYPE_VIDEO) { + container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, &descriptor->essence_container_ul); + if (st->codec->codec_id == CODEC_ID_NONE) + st->codec->codec_id = container_ul->id; + st->codec->width = descriptor->width; + st->codec->height = descriptor->height; + st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */ + st->need_parsing = 2; /* only parse headers */ + } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) { + container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, &descriptor->essence_container_ul); + if (st->codec->codec_id == CODEC_ID_NONE) + st->codec->codec_id = container_ul->id; + 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; + if (descriptor->essence_container_ul[13] == 0x01) /* D-10 Mapping */ + st->codec->channels = 8; /* force channels to 8 */ + } else if (st->codec->codec_id == CODEC_ID_MP2) { + st->need_parsing = 1; + } + } + if (container_ul && container_ul->wrapping == Clip) { + dprintf("stream %d: clip wrapped essence\n", st->index); + st->need_parsing = 1; + } + } + return 0; +} + +static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = { + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2F,0x00 }, mxf_read_metadata_preface }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_multiple_descriptor }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_metadata_generic_descriptor }, /* Generic Sound */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_metadata_generic_descriptor }, /* CDCI */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_metadata_generic_descriptor }, /* RGBA */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_metadata_generic_descriptor }, /* MPEG 2 Video */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_metadata_generic_descriptor }, /* Wave */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_metadata_generic_descriptor }, /* AES3 */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_metadata_track }, /* Static Track */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_metadata_track }, /* Generic Track */ + { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL }, +}; + +static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size) +{ + int i, b; + for (i = 0; i < size && !url_feof(pb); i++) { + b = get_byte(pb); + if (b == key[0]) + i = 0; + else if (b != key[i]) + i = -1; + } + return i == size; +} + +static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap) +{ + MXFContext *mxf = s->priv_data; + KLVPacket klv; + + if (!mxf_read_sync(&s->pb, mxf_header_partition_pack_key, 14)) { + av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n"); + return -1; + } + url_fseek(&s->pb, -14, SEEK_CUR); + mxf->fc = s; + while (!url_feof(&s->pb)) { + const MXFMetadataReadTableEntry *function; + + 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("read header", klv.key); +#endif + if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) { + /* FIXME avoid seek */ + url_fseek(&s->pb, klv.offset, SEEK_SET); + break; + } + + for (function = mxf_metadata_read_table; function->read; function++) { + if (IS_KLV_KEY(klv.key, function->key)) { + if (function->read(mxf, &klv) < 0) { + av_log(s, AV_LOG_ERROR, "error reading header metadata\n"); + return -1; + } + break; + } + } + if (!function->read) + url_fskip(&s->pb, klv.length); + } + return mxf_parse_structural_metadata(mxf); +} + +static int mxf_read_close(AVFormatContext *s) +{ + MXFContext *mxf = s->priv_data; + int i; + + av_freep(&mxf->packages_refs); + av_freep(&mxf->essence_container_data_sets_refs); + av_freep(&mxf->essence_containers_uls); + for (i = 0; i < mxf->metadata_sets_count; i++) { + switch (mxf->metadata_sets[i]->type) { + case MultipleDescriptor: + av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs); + break; + case Sequence: + av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs); + break; + case SourcePackage: + case MaterialPackage: + av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs); + break; + default: + break; + } + av_freep(&mxf->metadata_sets[i]); + } + av_freep(&mxf->metadata_sets); + return 0; +} + +static int mxf_probe(AVProbeData *p) { + uint8_t *bufp = p->buf; + uint8_t *end = p->buf + p->buf_size; + + if (p->buf_size < sizeof(mxf_header_partition_pack_key)) + return 0; + + /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */ + end -= sizeof(mxf_header_partition_pack_key); + for (; bufp < end; bufp++) { + if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key)) + return AVPROBE_SCORE_MAX; + } + return 0; +} + +/* rudimentary binary seek */ +/* XXX: use MXF Index */ +static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) +{ + AVStream *st = s->streams[stream_index]; + int64_t seconds; + + if (!s->bit_rate) + return -1; + if (sample_time < 0) + sample_time = 0; + seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den); + url_fseek(&s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET); + if (!mxf_read_sync(&s->pb, mxf_essence_element_key, 12)) + return -1; + + /* found KLV key */ + url_fseek(&s->pb, -12, SEEK_CUR); + av_update_cur_dts(s, st, sample_time); + return 0; +} + +AVInputFormat mxf_demuxer = { + "mxf", + "MXF format", + sizeof(MXFContext), + mxf_probe, + mxf_read_header, + mxf_read_packet, + mxf_read_close, + mxf_read_seek, +}; |