mirror of https://git.ffmpeg.org/ffmpeg.git
write index table and rip, muxer works pretty well now
Originally committed as revision 16936 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier
parent
6ebafef6ee
commit
0e9dbd9685
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@ -38,6 +38,8 @@
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static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
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static const int PAL_samples_per_frame[] = { 1920, 0 };
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#define MXF_INDEX_CLUSTER_SIZE 4096
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typedef struct {
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AVFifoBuffer fifo;
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unsigned fifo_size; ///< current fifo size allocated
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@ -52,6 +54,12 @@ typedef struct {
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UID uid;
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} MXFLocalTagPair;
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typedef struct {
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uint8_t flags;
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uint64_t offset;
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unsigned slice_offset[17]; // one video, 16 audio
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} MXFIndexEntry;
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typedef struct {
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AudioInterleaveContext aic;
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UID track_essence_element_key;
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@ -60,6 +68,7 @@ typedef struct {
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int64_t duration;
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int order; ///< interleaving order if dts are equal
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int interlaced; ///< wether picture is interlaced
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int temporal_reordering;
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} MXFStreamContext;
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typedef struct {
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@ -99,6 +108,9 @@ typedef struct MXFContext {
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uint8_t essence_containers_indices[FF_ARRAY_ELEMS(mxf_essence_container_uls)];
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AVRational time_base;
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int header_written;
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MXFIndexEntry *index_entries;
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unsigned edit_units_count;
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int edit_unit_start; ///< index of the stream starting edit unit
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} MXFContext;
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static const uint8_t uuid_base[] = { 0xAD,0xAB,0x44,0x24,0x2f,0x25,0x4d,0xc7,0x92,0xff,0x29,0xbd };
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@ -110,6 +122,8 @@ static const uint8_t umid_base[] = { 0x06,0x0A,0x2B,0x34,0x01,0x01,0x
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static const uint8_t op1a_ul[] = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x01,0x01,0x00 };
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static const uint8_t footer_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }; // ClosedComplete
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static const uint8_t primer_pack_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x05,0x01,0x00 };
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static const uint8_t index_table_segment_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 };
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static const uint8_t random_index_pack_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
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static const uint8_t header_open_partition_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }; // OpenIncomplete
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@ -188,6 +202,15 @@ static const MXFLocalTagPair mxf_local_tag_batch[] = {
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{ 0x3D07, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x02,0x01,0x01,0x04,0x00,0x00,0x00}}, /* ChannelCount */
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{ 0x3D01, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x02,0x03,0x03,0x04,0x00,0x00,0x00}}, /* Quantization bits */
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{ 0x3D06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x02,0x04,0x02,0x04,0x02,0x00,0x00,0x00,0x00}}, /* Sound Essence Compression */
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// Index Table Segment
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{ 0x3F0B, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x05,0x30,0x04,0x06,0x00,0x00,0x00,0x00}}, /* Index Edit Rate */
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{ 0x3F0C, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x01,0x03,0x01,0x0A,0x00,0x00}}, /* Index Start Position */
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{ 0x3F0D, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x07,0x02,0x02,0x01,0x01,0x02,0x00,0x00}}, /* Index Duration */
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{ 0x3F05, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x06,0x02,0x01,0x00,0x00,0x00,0x00,0x00}}, /* Edit Unit Byte Count */
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{ 0x3F06, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x01,0x03,0x04,0x05,0x00,0x00,0x00,0x00}}, /* IndexSID */
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{ 0x3F08, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x04,0x04,0x04,0x04,0x01,0x01,0x00,0x00,0x00}}, /* Slice Count */
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{ 0x3F09, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x01,0x06,0x00,0x00,0x00}}, /* Delta Entry Array */
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{ 0x3F0A, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x04,0x04,0x02,0x05,0x00,0x00,0x00}}, /* Index Entry Array */
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// MPEG video Descriptor
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{ 0x8000, {0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0x05,0x04,0x01,0x06,0x02,0x01,0x0B,0x00,0x00}}, /* BitRate */
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// Wave Audio Essence Descriptor
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@ -772,7 +795,7 @@ static int mxf_write_essence_container_data(AVFormatContext *s)
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ByteIOContext *pb = s->pb;
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mxf_write_metadata_key(pb, 0x012300);
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klv_encode_ber_length(pb, 64);
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klv_encode_ber_length(pb, 72);
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mxf_write_local_tag(pb, 16, 0x3C0A); // Instance UID
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mxf_write_uuid(pb, EssenceContainerData, 0);
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@ -783,6 +806,9 @@ static int mxf_write_essence_container_data(AVFormatContext *s)
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mxf_write_local_tag(pb, 4, 0x3F07); // BodySID
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put_be32(pb, 1);
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mxf_write_local_tag(pb, 4, 0x3F06); // IndexSID
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put_be32(pb, 2);
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return 0;
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}
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@ -797,7 +823,102 @@ static int mxf_write_header_metadata_sets(AVFormatContext *s)
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return 0;
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}
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static void mxf_write_partition(AVFormatContext *s, int bodysid, const uint8_t *key, int write_metadata)
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static int mxf_write_index_table_segment(AVFormatContext *s)
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{
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MXFContext *mxf = s->priv_data;
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ByteIOContext *pb = s->pb;
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int i, j, k, ret, key_offset = 0;
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int temporal_reordering = 0;
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av_log(s, AV_LOG_DEBUG, "edit units count %d\n", mxf->edit_units_count);
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put_buffer(pb, index_table_segment_key, 16);
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ret = klv_encode_ber_length(pb, 109 + s->nb_streams*6 +
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mxf->edit_units_count*(11+(s->nb_streams-1)*4));
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// instance id
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mxf_write_local_tag(pb, 16, 0x3C0A);
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mxf_write_uuid(pb, IndexTableSegment, 0);
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// index edit rate
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mxf_write_local_tag(pb, 8, 0x3F0B);
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put_be32(pb, mxf->time_base.num);
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put_be32(pb, mxf->time_base.den);
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// index start position
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mxf_write_local_tag(pb, 8, 0x3F0C);
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put_be64(pb, 0);
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// index duration
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mxf_write_local_tag(pb, 8, 0x3F0D);
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put_be64(pb, mxf->edit_units_count);
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// edit unit byte count
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mxf_write_local_tag(pb, 4, 0x3F05);
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put_be32(pb, 0);
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// index sid
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mxf_write_local_tag(pb, 4, 0x3F06);
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put_be32(pb, 2);
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// body sid
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mxf_write_local_tag(pb, 4, 0x3F07);
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put_be32(pb, 1);
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// slice count - 1
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mxf_write_local_tag(pb, 1, 0x3F08);
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put_byte(pb, s->nb_streams-1);
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// delta entry array
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mxf_write_local_tag(pb, 8 + s->nb_streams*6, 0x3F09);
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put_be32(pb, s->nb_streams); // num of entries
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put_be32(pb, 6); // size of one entry
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for (i = 0; i < s->nb_streams; i++) {
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AVStream *st = s->streams[i];
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MXFStreamContext *sc = st->priv_data;
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put_byte(pb, sc->temporal_reordering);
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if (sc->temporal_reordering)
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temporal_reordering = 1;
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put_byte(pb, i);
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put_be32(pb, 0); // element delta
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}
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mxf_write_local_tag(pb, 8 + mxf->edit_units_count*(11+(s->nb_streams-1)*4), 0x3F0A);
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put_be32(pb, mxf->edit_units_count); // num of entries
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put_be32(pb, 11+(s->nb_streams-1)*4); // size of one entry
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for (i = 0; i < mxf->edit_units_count; i++) {
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if (mxf->index_entries[i].flags & 0x40)
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key_offset = 0;
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if (temporal_reordering) {
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int temporal_offset = 0;
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for (j = i+1; j < mxf->edit_units_count; j++) {
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temporal_offset++;
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if (mxf->index_entries[j].flags & 0x10) { // backward prediction
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// next is not b, so is reordered
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if (!(mxf->index_entries[i+1].flags & 0x10))
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temporal_offset = -temporal_offset;
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break;
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}
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}
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put_byte(pb, temporal_offset);
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} else
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put_byte(pb, 0);
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put_byte(pb, key_offset);
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put_byte(pb, mxf->index_entries[i].flags);
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// stream offset
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put_be64(pb, mxf->index_entries[i].offset - mxf->index_entries[0].offset);
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for (k = 0; k < s->nb_streams; k++) {
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if (mxf->index_entries[i].slice_offset[k])
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put_be32(pb, mxf->index_entries[i].slice_offset[k]);
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}
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key_offset--;
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}
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return ret;
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}
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static void mxf_write_partition(AVFormatContext *s, int bodysid, int indexsid,
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const uint8_t *key, int write_metadata)
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{
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MXFContext *mxf = s->priv_data;
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ByteIOContext *pb = s->pb;
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@ -822,9 +943,10 @@ static void mxf_write_partition(AVFormatContext *s, int bodysid, const uint8_t *
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header_byte_count_offset = url_ftell(pb);
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put_be64(pb, 0); // headerByteCount, update later
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// no indexTable
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put_be64(pb, 0); // indexByteCount
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put_be32(pb, 0); // indexSID
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// indexTable
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put_be64(pb, indexsid ? 19 + 109 + s->nb_streams*6 +
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mxf->edit_units_count*(11+(s->nb_streams-1)*4) : 0); // indexByteCount
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put_be32(pb, indexsid); // indexSID
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put_be64(pb, 0); // bodyOffset
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put_be32(pb, bodysid); // bodySID
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@ -885,10 +1007,13 @@ static const UID *mxf_get_mpeg2_codec_ul(AVCodecContext *avctx)
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static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt)
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{
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MXFContext *mxf = s->priv_data;
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MXFStreamContext *sc = st->priv_data;
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uint32_t c = -1;
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int i;
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mxf->index_entries[mxf->edit_units_count].flags = 0;
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for(i = 0; i < pkt->size - 4; i++) {
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c = (c<<8) + pkt->data[i];
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if (c == 0x1B5) {
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@ -899,6 +1024,23 @@ static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt
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sc->interlaced = !(pkt->data[i+5] & 0x80); // progressive frame
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break;
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}
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} else if (c == 0x1b8) { // gop
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if (i + 4 < pkt->size && pkt->data[i+4]>>6 & 0x01) // closed
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mxf->index_entries[mxf->edit_units_count].flags |= 0x80; // random access
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} else if (c == 0x1b3) { // seq
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mxf->index_entries[mxf->edit_units_count].flags |= 0x40;
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} else if (c == 0x100) { // pic
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int pict_type = (pkt->data[i+2]>>3) & 0x07;
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if (pict_type == 2) { // P frame
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mxf->index_entries[mxf->edit_units_count].flags |= 0x22;
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st->codec->gop_size = 1;
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} else if (pict_type == 3) { // B frame
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mxf->index_entries[mxf->edit_units_count].flags |= 0x33;
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sc->temporal_reordering = -1;
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} else if (!pict_type) {
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av_log(s, AV_LOG_ERROR, "error parsing mpeg2 frame\n");
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return 0;
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}
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}
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}
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sc->codec_ul = mxf_get_mpeg2_codec_ul(st->codec);
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@ -952,6 +1094,11 @@ static int mxf_write_header(AVFormatContext *s)
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uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
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const int *samples_per_frame = NULL;
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if (s->nb_streams > 17) {
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av_log(s, AV_LOG_ERROR, "error, mxf muxer supports 17 tracks maximum\n");
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return -1;
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}
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for (i = 0; i < s->nb_streams; i++) {
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AVStream *st = s->streams[i];
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MXFStreamContext *sc = av_mallocz(sizeof(*sc));
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@ -970,6 +1117,7 @@ static int mxf_write_header(AVFormatContext *s)
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av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
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return -1;
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}
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mxf->edit_unit_start = st->index;
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} else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
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if (st->codec->sample_rate != 48000) {
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av_log(s, AV_LOG_ERROR, "only 48khz is implemented\n");
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@ -1021,17 +1169,37 @@ static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
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AVStream *st = s->streams[pkt->stream_index];
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MXFStreamContext *sc = st->priv_data;
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if (!mxf->header_written) {
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if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
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if (!mxf_parse_mpeg2_frame(s, st, pkt)) {
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av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
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return -1;
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}
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if (!(mxf->edit_units_count % MXF_INDEX_CLUSTER_SIZE)) {
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mxf->index_entries = av_realloc(mxf->index_entries,
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(mxf->edit_units_count + MXF_INDEX_CLUSTER_SIZE)*
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sizeof(*mxf->index_entries));
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if (!mxf->index_entries) {
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av_log(s, AV_LOG_ERROR, "could not allocate index entries\n");
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return -1;
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}
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mxf_write_partition(s, 1, header_open_partition_key, 1);
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}
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if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
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if (!mxf_parse_mpeg2_frame(s, st, pkt)) {
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av_log(s, AV_LOG_ERROR, "could not get mpeg2 profile and level\n");
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return -1;
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}
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}
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if (!mxf->header_written) {
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mxf_write_partition(s, 1, 0, header_open_partition_key, 1);
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mxf->header_written = 1;
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}
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if (st->index == mxf->edit_unit_start) {
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mxf->index_entries[mxf->edit_units_count].offset = url_ftell(pb);
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mxf->index_entries[mxf->edit_units_count].slice_offset[st->index] = 0;
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mxf->edit_units_count++;
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} else {
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mxf->index_entries[mxf->edit_units_count-1].slice_offset[st->index] =
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url_ftell(pb) - mxf->index_entries[mxf->edit_units_count-1].offset;
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}
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put_buffer(pb, sc->track_essence_element_key, 16); // write key
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klv_encode_ber_length(pb, pkt->size); // write length
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put_buffer(pb, pkt->data, pkt->size); // write value
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@ -1042,16 +1210,39 @@ static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
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return 0;
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}
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static void mxf_write_random_index_pack(AVFormatContext *s)
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{
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MXFContext *mxf = s->priv_data;
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ByteIOContext *pb = s->pb;
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uint64_t pos = url_ftell(pb);
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put_buffer(pb, random_index_pack_key, 16);
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klv_encode_ber_length(pb, 28);
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put_be32(pb, 1); // BodySID of header partition
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put_be64(pb, 0); // offset of header partition
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put_be32(pb, 0); // BodySID of footer partition
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put_be64(pb, mxf->footer_partition_offset);
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put_be32(pb, url_ftell(pb) - pos + 4);
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}
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static int mxf_write_footer(AVFormatContext *s)
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{
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MXFContext *mxf = s->priv_data;
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ByteIOContext *pb = s->pb;
|
||||
|
||||
mxf->footer_partition_offset = url_ftell(pb);
|
||||
mxf_write_partition(s, 0, footer_partition_key, 0);
|
||||
mxf_write_partition(s, 0, 2, footer_partition_key, 0);
|
||||
|
||||
mxf_write_index_table_segment(s);
|
||||
|
||||
mxf_write_random_index_pack(s);
|
||||
|
||||
if (!url_is_streamed(s->pb)) {
|
||||
url_fseek(pb, 0, SEEK_SET);
|
||||
mxf_write_partition(s, 1, header_closed_partition_key, 1);
|
||||
mxf_write_partition(s, 1, 0, header_closed_partition_key, 1);
|
||||
}
|
||||
|
||||
ff_audio_interleave_close(s);
|
||||
|
|
|
|||
Loading…
Reference in New Issue