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Use macros to eliminate code duplication in MXF metadata read functions.
Originally committed as revision 7449 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger
parent
2d193b2ea0
commit
977d126e6e
@ -359,26 +359,37 @@ static int mxf_read_metadata_content_storage(MXFContext *mxf, KLVPacket *klv)
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return 0;
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}
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#define MXF_READ_LOCAL_TAGS_START(typename, ctype, name) \
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ByteIOContext *pb = &mxf->fc->pb;\
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ctype *name = av_mallocz(sizeof(*name));\
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int bytes_read = 0;\
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\
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while (bytes_read < klv->length) {\
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int tag = get_be16(pb);\
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int size = get_be16(pb); /* KLV specified by 0x53 */\
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\
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bytes_read += size + 4;\
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dprintf("tag 0x%04X, size %d\n", tag, size);\
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if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */\
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av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);\
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continue;\
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}\
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switch (tag) {\
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case 0x3C0A:\
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get_buffer(pb, name->uid, 16);\
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break;
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#define MXF_READ_LOCAL_TAGS_STOP(typename, ctype, name)\
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default:\
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url_fskip(pb, size);\
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}\
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}\
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name->type = typename;\
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return mxf_add_metadata_set(mxf, name);
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static int mxf_read_metadata_source_clip(MXFContext *mxf, KLVPacket *klv)
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{
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ByteIOContext *pb = &mxf->fc->pb;
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MXFStructuralComponent *source_clip = av_mallocz(sizeof(*source_clip));
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int bytes_read = 0;
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while (bytes_read < klv->length) {
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int tag = get_be16(pb);
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int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
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bytes_read += size + 4;
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dprintf("tag 0x%04X, size %d\n", tag, size);
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if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
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av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);
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continue;
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}
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switch (tag) {
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case 0x3C0A:
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get_buffer(pb, source_clip->uid, 16);
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break;
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MXF_READ_LOCAL_TAGS_START(SourceClip, MXFStructuralComponent, source_clip)
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case 0x0202:
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source_clip->duration = get_be64(pb);
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break;
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@ -393,28 +404,12 @@ static int mxf_read_metadata_source_clip(MXFContext *mxf, KLVPacket *klv)
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case 0x1102:
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source_clip->source_track_id = get_be32(pb);
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break;
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default:
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url_fskip(pb, size);
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}
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}
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source_clip->type = SourceClip;
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return mxf_add_metadata_set(mxf, source_clip);
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MXF_READ_LOCAL_TAGS_STOP(SourceClip, MXFStructuralComponent, source_clip)
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}
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static int mxf_read_metadata_material_package(MXFContext *mxf, KLVPacket *klv)
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{
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ByteIOContext *pb = &mxf->fc->pb;
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MXFPackage *package = av_mallocz(sizeof(*package));
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int bytes_read = 0;
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while (bytes_read < klv->length) {
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int tag = get_be16(pb);
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int size = get_be16(pb); /* KLV specified by 0x53 */
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switch (tag) {
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case 0x3C0A:
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get_buffer(pb, package->uid, 16);
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break;
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MXF_READ_LOCAL_TAGS_START(MaterialPackage, MXFPackage, package)
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case 0x4403:
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package->tracks_count = get_be32(pb);
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if (package->tracks_count >= UINT_MAX / sizeof(UID))
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@ -423,30 +418,12 @@ static int mxf_read_metadata_material_package(MXFContext *mxf, KLVPacket *klv)
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url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
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get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
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break;
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default:
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url_fskip(pb, size);
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}
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bytes_read += size + 4;
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}
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package->type = MaterialPackage;
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return mxf_add_metadata_set(mxf, package);
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MXF_READ_LOCAL_TAGS_STOP(MaterialPackage, MXFPackage, package)
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}
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static int mxf_read_metadata_track(MXFContext *mxf, KLVPacket *klv)
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{
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ByteIOContext *pb = &mxf->fc->pb;
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MXFTrack *track = av_mallocz(sizeof(*track));
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int bytes_read = 0;
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while (bytes_read < klv->length) {
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int tag = get_be16(pb);
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int size = get_be16(pb); /* KLV specified by 0x53 */
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dprintf("tag 0x%04X, size %d\n", tag, size);
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switch (tag) {
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case 0x3C0A:
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get_buffer(pb, track->uid, 16);
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break;
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MXF_READ_LOCAL_TAGS_START(Track, MXFTrack, track)
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case 0x4801:
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track->track_id = get_be32(pb);
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break;
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@ -460,30 +437,12 @@ static int mxf_read_metadata_track(MXFContext *mxf, KLVPacket *klv)
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case 0x4803:
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get_buffer(pb, track->sequence_ref, 16);
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break;
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default:
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url_fskip(pb, size);
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}
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bytes_read += size + 4;
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}
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track->type = Track;
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return mxf_add_metadata_set(mxf, track);
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MXF_READ_LOCAL_TAGS_STOP(Track, MXFTrack, track)
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}
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static int mxf_read_metadata_sequence(MXFContext *mxf, KLVPacket *klv)
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{
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ByteIOContext *pb = &mxf->fc->pb;
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MXFSequence *sequence = av_mallocz(sizeof(*sequence));
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int bytes_read = 0;
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while (bytes_read < klv->length) {
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int tag = get_be16(pb);
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int size = get_be16(pb); /* KLV specified by 0x53 */
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dprintf("tag 0x%04X, size %d\n", tag, size);
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switch (tag) {
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case 0x3C0A:
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get_buffer(pb, sequence->uid, 16);
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break;
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MXF_READ_LOCAL_TAGS_START(Sequence, MXFSequence, sequence)
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case 0x0202:
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sequence->duration = get_be64(pb);
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break;
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@ -498,30 +457,12 @@ static int mxf_read_metadata_sequence(MXFContext *mxf, KLVPacket *klv)
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url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
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get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
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break;
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default:
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url_fskip(pb, size);
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}
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bytes_read += size + 4;
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}
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sequence->type = Sequence;
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return mxf_add_metadata_set(mxf, sequence);
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MXF_READ_LOCAL_TAGS_STOP(Sequence, MXFSequence, sequence)
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}
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static int mxf_read_metadata_source_package(MXFContext *mxf, KLVPacket *klv)
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{
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ByteIOContext *pb = &mxf->fc->pb;
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MXFPackage *package = av_mallocz(sizeof(*package));
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int bytes_read = 0;
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while (bytes_read < klv->length) {
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int tag = get_be16(pb);
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int size = get_be16(pb); /* KLV specified by 0x53 */
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dprintf("tag 0x%04X, size %d\n", tag, size);
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switch (tag) {
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case 0x3C0A:
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get_buffer(pb, package->uid, 16);
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break;
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MXF_READ_LOCAL_TAGS_START(SourcePackage, MXFPackage, package)
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case 0x4403:
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package->tracks_count = get_be32(pb);
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if (package->tracks_count >= UINT_MAX / sizeof(UID))
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@ -538,30 +479,12 @@ static int mxf_read_metadata_source_package(MXFContext *mxf, KLVPacket *klv)
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case 0x4701:
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get_buffer(pb, package->descriptor_ref, 16);
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break;
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default:
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url_fskip(pb, size);
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}
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bytes_read += size + 4;
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}
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package->type = SourcePackage;
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return mxf_add_metadata_set(mxf, package);
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MXF_READ_LOCAL_TAGS_STOP(SourcePackage, MXFPackage, package)
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}
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static int mxf_read_metadata_multiple_descriptor(MXFContext *mxf, KLVPacket *klv)
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{
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ByteIOContext *pb = &mxf->fc->pb;
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MXFDescriptor *descriptor = av_mallocz(sizeof(*descriptor));
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int bytes_read = 0;
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while (bytes_read < klv->length) {
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int tag = get_be16(pb);
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int size = get_be16(pb); /* KLV specified by 0x53 */
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dprintf("tag 0x%04X, size %d\n", tag, size);
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switch (tag) {
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case 0x3C0A:
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get_buffer(pb, descriptor->uid, 16);
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break;
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MXF_READ_LOCAL_TAGS_START(MultipleDescriptor, MXFDescriptor, descriptor)
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case 0x3F01:
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descriptor->sub_descriptors_count = get_be32(pb);
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if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
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@ -570,13 +493,7 @@ static int mxf_read_metadata_multiple_descriptor(MXFContext *mxf, KLVPacket *klv
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url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
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get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
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break;
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default:
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url_fskip(pb, size);
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}
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bytes_read += size + 4;
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}
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descriptor->type = MultipleDescriptor;
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return mxf_add_metadata_set(mxf, descriptor);
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MXF_READ_LOCAL_TAGS_STOP(MultipleDescriptor, MXFDescriptor, descriptor)
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}
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static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
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@ -604,19 +521,7 @@ static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *des
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static int mxf_read_metadata_generic_descriptor(MXFContext *mxf, KLVPacket *klv)
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{
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ByteIOContext *pb = &mxf->fc->pb;
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MXFDescriptor *descriptor = av_mallocz(sizeof(*descriptor));
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int bytes_read = 0;
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while (bytes_read < klv->length) {
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int tag = get_be16(pb);
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int size = get_be16(pb); /* KLV specified by 0x53 */
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dprintf("tag 0x%04X, size %d\n", tag, size);
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switch (tag) {
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case 0x3C0A:
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get_buffer(pb, descriptor->uid, 16);
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break;
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MXF_READ_LOCAL_TAGS_START(Descriptor, MXFDescriptor, descriptor)
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case 0x3004:
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get_buffer(pb, descriptor->essence_container_ul, 16);
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break;
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@ -657,13 +562,7 @@ static int mxf_read_metadata_generic_descriptor(MXFContext *mxf, KLVPacket *klv)
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descriptor->extradata_size = size;
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get_buffer(pb, descriptor->extradata, size);
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break;
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default:
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url_fskip(pb, size);
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}
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bytes_read += size + 4;
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}
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descriptor->type = Descriptor;
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return mxf_add_metadata_set(mxf, descriptor);
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MXF_READ_LOCAL_TAGS_STOP(Descriptor, MXFDescriptor, descriptor)
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}
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/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
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