[FFmpeg-devel] [PATCH] avformat/mxf: support MCA audio information
Marc-Antoine Arnaud
marc-antoine.arnaud at luminvent.com
Wed Nov 3 08:55:20 EET 2021
---
libavformat/mxf.h | 1 +
libavformat/mxfdec.c | 280 ++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 275 insertions(+), 6 deletions(-)
diff --git a/libavformat/mxf.h b/libavformat/mxf.h
index fe9c52732c..cddbcb13c9 100644
--- a/libavformat/mxf.h
+++ b/libavformat/mxf.h
@@ -50,6 +50,7 @@ enum MXFMetadataSetType {
TaggedValue,
TapeDescriptor,
AVCSubDescriptor,
+ MCASubDescriptor,
};
enum MXFFrameLayout {
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index c28549f6a9..db4491e25f 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -51,11 +51,14 @@
#include "libavutil/mastering_display_metadata.h"
#include "libavutil/mathematics.h"
#include "libavcodec/bytestream.h"
+#include "libavcodec/internal.h"
+#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/parseutils.h"
#include "libavutil/timecode.h"
#include "libavutil/opt.h"
#include "avformat.h"
+#include "avlanguage.h"
#include "internal.h"
#include "mxf.h"
@@ -177,6 +180,8 @@ typedef struct {
int body_sid;
MXFWrappingScheme wrapping;
int edit_units_per_packet; /* how many edit units to read at a time (PCM, ClipWrapped) */
+ int require_reordering;
+ int channel_ordering[FF_SANE_NB_CHANNELS];
} MXFTrack;
typedef struct MXFDescriptor {
@@ -205,6 +210,8 @@ typedef struct MXFDescriptor {
unsigned int vert_subsampling;
UID *file_descriptors_refs;
int file_descriptors_count;
+ UID *sub_descriptors_refs;
+ int sub_descriptors_count;
int linked_track_id;
uint8_t *extradata;
int extradata_size;
@@ -217,6 +224,15 @@ typedef struct MXFDescriptor {
size_t coll_size;
} MXFDescriptor;
+typedef struct MXFMCASubDescriptor {
+ MXFMetadataSet meta;
+ UID uid;
+ UID mca_link_id;
+ UID mca_group_link_id;
+ UID mca_label_dictionary_id;
+ char *language;
+} MXFMCASubDescriptor;
+
typedef struct MXFIndexTableSegment {
MXFMetadataSet meta;
int edit_unit_byte_count;
@@ -290,6 +306,7 @@ typedef struct MXFContext {
int nb_index_tables;
MXFIndexTable *index_tables;
int eia608_extract;
+ int skip_audio_reordering;
} MXFContext;
/* NOTE: klv_offset is not set (-1) for local keys */
@@ -311,6 +328,9 @@ static const uint8_t mxf_system_item_key_cp[] = { 0x06,0x0e,0x2b,0x
static const uint8_t mxf_system_item_key_gc[] = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x03,0x01,0x14 };
static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
static const uint8_t mxf_apple_coll_prefix[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x0e,0x20,0x04,0x01,0x05,0x03,0x01 };
+static const uint8_t mxf_audio_channel[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01 };
+static const uint8_t mxf_soundfield_group[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02 };
+
/* complete keys to match */
static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
@@ -323,6 +343,15 @@ static const uint8_t mxf_indirect_value_utf16be[] = { 0x42,0x01,0x10,0x
static const uint8_t mxf_apple_coll_max_cll[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x0e,0x20,0x04,0x01,0x05,0x03,0x01,0x01 };
static const uint8_t mxf_apple_coll_max_fall[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x0e,0x20,0x04,0x01,0x05,0x03,0x01,0x02 };
+static const uint8_t mxf_mca_label_dictionary_id[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x01,0x03,0x07,0x01,0x01,0x00,0x00,0x00 };
+static const uint8_t mxf_mca_tag_symbol[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x01,0x03,0x07,0x01,0x02,0x00,0x00,0x00 };
+static const uint8_t mxf_mca_tag_name[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x01,0x03,0x07,0x01,0x03,0x00,0x00,0x00 };
+static const uint8_t mxf_mca_link_id[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x01,0x03,0x07,0x01,0x05,0x00,0x00,0x00 };
+static const uint8_t mxf_soundfield_group_link_id[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x01,0x03,0x07,0x01,0x06,0x00,0x00,0x00 };
+static const uint8_t mxf_mca_rfc5646_spoken_language[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0d,0x03,0x01,0x01,0x02,0x03,0x15,0x00,0x00 };
+
+static const uint8_t mxf_sub_descriptor[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x04,0x06,0x10,0x00,0x00 };
+
static const uint8_t mxf_mastering_display_prefix[13] = { FF_MXF_MasteringDisplay_PREFIX };
static const uint8_t mxf_mastering_display_uls[4][16] = {
FF_MXF_MasteringDisplayPrimaries,
@@ -343,6 +372,11 @@ static void mxf_free_metadataset(MXFMetadataSet **ctx, int freectx)
av_freep(&((MXFDescriptor *)*ctx)->mastering);
av_freep(&((MXFDescriptor *)*ctx)->coll);
av_freep(&((MXFDescriptor *)*ctx)->file_descriptors_refs);
+ av_freep(&((MXFDescriptor *)*ctx)->sub_descriptors_refs);
+ break;
+ case MCASubDescriptor:
+ if (((MXFMCASubDescriptor *)*ctx)->language)
+ av_freep(&((MXFMCASubDescriptor *)*ctx)->language);
break;
case Sequence:
av_freep(&((MXFSequence *)*ctx)->structural_components_refs);
@@ -899,6 +933,30 @@ static int mxf_read_strong_ref_array(AVIOContext *pb, UID **refs, int *count)
return 0;
}
+static inline int mxf_read_us_ascii_string(AVIOContext *pb, int size, char** str)
+{
+ int ret;
+ size_t buf_size;
+
+ if (size < 0 || size > INT_MAX - 1)
+ return AVERROR(EINVAL);
+
+ buf_size = size + 1;
+ av_free(*str);
+ *str = av_malloc(buf_size);
+ if (!*str)
+ return AVERROR(ENOMEM);
+
+ ret = avio_get_str(pb, size, *str, buf_size);
+
+ if (ret < 0) {
+ av_freep(str);
+ return ret;
+ }
+
+ return ret;
+}
+
static inline int mxf_read_utf16_string(AVIOContext *pb, int size, char** str, int be)
{
int ret;
@@ -1353,11 +1411,34 @@ static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int
descriptor->coll->MaxFALL = avio_rb16(pb);
}
}
+
+ if (IS_KLV_KEY(uid, mxf_sub_descriptor))
+ mxf_read_strong_ref_array(pb, &descriptor->sub_descriptors_refs, &descriptor->sub_descriptors_count);
+
break;
}
return 0;
}
+static int mxf_read_mca_sub_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
+{
+ MXFMCASubDescriptor *mca_sub_descriptor = arg;
+
+ if (IS_KLV_KEY(uid, mxf_mca_label_dictionary_id))
+ avio_read(pb, mca_sub_descriptor->mca_label_dictionary_id, 16);
+
+ if (IS_KLV_KEY(uid, mxf_mca_link_id))
+ avio_read(pb, mca_sub_descriptor->mca_link_id, 16);
+
+ if (IS_KLV_KEY(uid, mxf_soundfield_group_link_id))
+ avio_read(pb, mca_sub_descriptor->mca_group_link_id, 16);
+
+ if (IS_KLV_KEY(uid, mxf_mca_rfc5646_spoken_language))
+ return mxf_read_us_ascii_string(pb, size, &mca_sub_descriptor->language);
+
+ return 0;
+}
+
static int mxf_read_indirect_value(void *arg, AVIOContext *pb, int size)
{
MXFTaggedValue *tagged_value = arg;
@@ -1487,6 +1568,56 @@ static const MXFCodecUL mxf_data_essence_container_uls[] = {
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
};
+typedef struct MXFSoundfieldGroupUL {
+ UID uid;
+ int64_t id;
+} MXFSoundfieldGroupUL;
+
+static const MXFSoundfieldGroupUL mxf_soundfield_groups[] = {
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00 }, AV_CH_LAYOUT_5POINT1 }, // 5.1
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x02,0x00,0x00,0x00,0x00 }, AV_CH_LAYOUT_7POINT1 }, // 7.1 DS
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x03,0x00,0x00,0x00,0x00 }, AV_CH_LAYOUT_7POINT1_WIDE }, // 7.1 SDS
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x04,0x00,0x00,0x00,0x00 }, AV_CH_LAYOUT_6POINT1 }, // 6.1
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x05,0x00,0x00,0x00,0x00 }, AV_CH_LAYOUT_MONO }, // 1.0 Monoral
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x20,0x01,0x00,0x00,0x00 }, AV_CH_LAYOUT_STEREO }, // Standard stereo
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x20,0x02,0x00,0x00,0x00 }, AV_CH_LAYOUT_STEREO }, // Dual mono
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x20,0x04,0x00,0x00,0x00 }, AV_CH_LAYOUT_SURROUND }, // 3.0
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x20,0x05,0x00,0x00,0x00 }, AV_CH_LAYOUT_4POINT0 }, // 4.0
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x20,0x06,0x00,0x00,0x00 }, AV_CH_LAYOUT_5POINT0 }, // 5.0
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x20,0x07,0x00,0x00,0x00 }, AV_CH_LAYOUT_6POINT0 }, // 6.0
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x20,0x08,0x00,0x00,0x00 }, AV_CH_LAYOUT_7POINT0 }, // 7.0
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x20,0x09,0x00,0x00,0x00 }, AV_CH_LAYOUT_STEREO }, // LrRt
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x20,0x0a,0x00,0x00,0x00 }, AV_CH_LAYOUT_5POINT1 }, // 5.1 EX
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x20,0x0b,0x00,0x00,0x00 }, AV_CH_LAYOUT_MONO }, // Hearing accessibility
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x02,0x20,0x0c,0x00,0x00,0x00 }, AV_CH_LAYOUT_MONO }, // Visual accessibility
+ { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0 },
+};
+
+typedef struct MXFChannelOrderingUL {
+ UID uid;
+ int index;
+ enum AVAudioServiceType service_type;
+} MXFChannelOrderingUL;
+
+static const MXFChannelOrderingUL mxf_channel_ordering[] = {
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x01,0x00,0x00,0x00,0x00 }, 0, AV_AUDIO_SERVICE_TYPE_NB }, // Left audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x02,0x00,0x00,0x00,0x00 }, 1, AV_AUDIO_SERVICE_TYPE_NB }, // Right audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x03,0x00,0x00,0x00,0x00 }, 2, AV_AUDIO_SERVICE_TYPE_NB }, // Center audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x04,0x00,0x00,0x00,0x00 }, 5, AV_AUDIO_SERVICE_TYPE_NB }, // LFE audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x05,0x00,0x00,0x00,0x00 }, 3, AV_AUDIO_SERVICE_TYPE_NB }, // Left surround audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x06,0x00,0x00,0x00,0x00 }, 4, AV_AUDIO_SERVICE_TYPE_NB }, // Right surround audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x07,0x00,0x00,0x00,0x00 }, 3, AV_AUDIO_SERVICE_TYPE_NB }, // Left side surround audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x08,0x00,0x00,0x00,0x00 }, 4, AV_AUDIO_SERVICE_TYPE_NB }, // Right side surround audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x09,0x00,0x00,0x00,0x00 }, 6, AV_AUDIO_SERVICE_TYPE_NB }, // Left rear surround audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x0a,0x00,0x00,0x00,0x00 }, 7, AV_AUDIO_SERVICE_TYPE_NB }, // Right rear surround audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x0b,0x00,0x00,0x00,0x00 }, 6, AV_AUDIO_SERVICE_TYPE_NB }, // Left center audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x0c,0x00,0x00,0x00,0x00 }, 7, AV_AUDIO_SERVICE_TYPE_NB }, // Right center audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x0d,0x00,0x00,0x00,0x00 }, 6, AV_AUDIO_SERVICE_TYPE_NB }, // Center surround audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x0e,0x00,0x00,0x00,0x00 }, 0, AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED }, // Hearing impaired audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x0f,0x00,0x00,0x00,0x00 }, 0, AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED }, // Visually impaired narrative audio channel
+ { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_AUDIO_SERVICE_TYPE_NB },
+};
+
static MXFWrappingScheme mxf_get_wrapping_kind(UID *essence_container_ul)
{
int val;
@@ -2287,6 +2418,27 @@ static enum AVColorRange mxf_get_color_range(MXFContext *mxf, MXFDescriptor *des
return AVCOL_RANGE_UNSPECIFIED;
}
+static int is_pcm(enum AVCodecID codec_id)
+{
+ /* we only care about "normal" PCM codecs until we get samples */
+ return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
+}
+
+static int set_language(AVFormatContext *s, const char *rfc5646, AVDictionary **met)
+{
+ // language abbr should contain at least 2 chars
+ if (rfc5646 && strlen(rfc5646) > 1) {
+ char primary_tag[4] =
+ {rfc5646[0], rfc5646[1], rfc5646[2] != '-' ? rfc5646[2] : '\0', '\0'};
+
+ const char *iso6392 = ff_convert_lang_to(primary_tag,
+ AV_LANG_ISO639_2_BIBL);
+ if (iso6392)
+ return(av_dict_set(met, "language", iso6392, 0));
+ }
+ return 0;
+}
+
static int mxf_parse_structural_metadata(MXFContext *mxf)
{
MXFPackage *material_package = NULL;
@@ -2322,7 +2474,9 @@ static int mxf_parse_structural_metadata(MXFContext *mxf)
const MXFCodecUL *pix_fmt_ul = NULL;
AVStream *st;
AVTimecode tc;
+ enum AVAudioServiceType *ast;
int flags;
+ int current_channel;
if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
@@ -2681,6 +2835,90 @@ static int mxf_parse_structural_metadata(MXFContext *mxf)
st->internal->need_parsing = AVSTREAM_PARSE_FULL;
}
st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
+
+ current_channel = 0;
+
+ if (descriptor->channels >= FF_SANE_NB_CHANNELS) {
+ av_log(mxf->fc, AV_LOG_ERROR, "max number of channels %d reached\n", FF_SANE_NB_CHANNELS);
+ return AVERROR_INVALIDDATA;
+ }
+
+ for (j = 0; j < descriptor->channels; ++j) {
+ source_track->channel_ordering[j] = j;
+ }
+
+ for (j = 0; j < descriptor->sub_descriptors_count; j++) {
+ MXFMCASubDescriptor *mca_sub_descriptor = mxf_resolve_strong_ref(mxf, &descriptor->sub_descriptors_refs[j], MCASubDescriptor);
+ if (mca_sub_descriptor == NULL) {
+ continue;
+ }
+
+ // Soundfield group
+ if (IS_KLV_KEY(mca_sub_descriptor->mca_label_dictionary_id, mxf_soundfield_group)) {
+ MXFSoundfieldGroupUL* group_ptr = (MXFSoundfieldGroupUL*)&mxf_soundfield_groups[0];
+
+ while (group_ptr->uid[0]) {
+ if (IS_KLV_KEY(group_ptr->uid, mca_sub_descriptor->mca_label_dictionary_id)) {
+ st->codecpar->channel_layout = group_ptr->id;
+ break;
+ }
+ group_ptr++;
+ }
+ }
+
+ // Audio channel
+ if (IS_KLV_KEY(mca_sub_descriptor->mca_label_dictionary_id, mxf_audio_channel)) {
+ MXFChannelOrderingUL* channel_ordering_ptr = (MXFChannelOrderingUL*)&mxf_channel_ordering[0];
+
+ while (channel_ordering_ptr->uid[0]) {
+ if (IS_KLV_KEY(channel_ordering_ptr->uid, mca_sub_descriptor->mca_label_dictionary_id)) {
+ source_track->channel_ordering[current_channel] = channel_ordering_ptr->index;
+
+ if(channel_ordering_ptr->service_type != AV_AUDIO_SERVICE_TYPE_NB) {
+ ast = (enum AVAudioServiceType*)av_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE, sizeof(*ast));
+ *ast = channel_ordering_ptr->service_type;
+ }
+
+ current_channel += 1;
+ break;
+ }
+ channel_ordering_ptr++;
+ }
+ }
+
+ // set language from MCA spoken language information
+ if (mca_sub_descriptor->language) {
+ ret = set_language(mxf->fc, mca_sub_descriptor->language, &st->metadata);
+ if (ret < 0) {
+ return ret;
+ }
+ }
+ }
+
+ // check if the mapping is not required
+ source_track->require_reordering = 0;
+ for (j = 0; j < descriptor->channels; ++j) {
+ if (source_track->channel_ordering[j] != j) {
+ source_track->require_reordering = 1;
+ break;
+ }
+ }
+
+ if (source_track->require_reordering && is_pcm(st->codecpar->codec_id)) {
+ current_channel = 0;
+ av_log(mxf->fc, AV_LOG_DEBUG, "MCA Audio mapping (");
+ for(j = 0; j < descriptor->channels; ++j) {
+ for(int k = 0; k < descriptor->channels; ++k) {
+ if(source_track->channel_ordering[k] == current_channel) {
+ av_log(mxf->fc, AV_LOG_DEBUG, "%d -> %d", source_track->channel_ordering[k], k);
+ if (current_channel != descriptor->channels - 1)
+ av_log(mxf->fc, AV_LOG_DEBUG, ", ");
+ current_channel += 1;
+ }
+ }
+ }
+ av_log(mxf->fc, AV_LOG_DEBUG, ")\n");
+ }
} else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
enum AVMediaType type;
container_ul = mxf_get_codec_ul(mxf_data_essence_container_uls, essence_container_ul);
@@ -2881,6 +3119,8 @@ static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
{ { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5c,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* VANC/VBI - SMPTE 436M */
{ { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
{ { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x64,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* DC Timed Text Descriptor */
+ { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x6c,0x00 }, mxf_read_mca_sub_descriptor, sizeof(MXFMCASubDescriptor), MCASubDescriptor }, /* Soundfield Group Label Subdescriptor */
+ { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x6b,0x00 }, mxf_read_mca_sub_descriptor, sizeof(MXFMCASubDescriptor), MCASubDescriptor }, /* Audio Channel Label Subdescriptor */
{ { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
{ { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
{ { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
@@ -3180,12 +3420,6 @@ static void mxf_compute_essence_containers(AVFormatContext *s)
}
}
-static int is_pcm(enum AVCodecID codec_id)
-{
- /* we only care about "normal" PCM codecs until we get samples */
- return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
-}
-
static MXFIndexTable *mxf_find_index_table(MXFContext *mxf, int index_sid)
{
int i;
@@ -3612,6 +3846,28 @@ static int mxf_set_pts(MXFContext *mxf, AVStream *st, AVPacket *pkt)
return 0;
}
+static int mxf_audio_remapping(int* channel_ordering, uint8_t* data, int size, int sample_size, int channels)
+{
+ int sample_offset = channels * sample_size;
+ int number_of_samples = size / sample_offset;
+ uint8_t tmp[FF_SANE_NB_CHANNELS * 4];
+ uint8_t* data_ptr = data;
+
+ if (!tmp)
+ return AVERROR(ENOMEM);
+
+ for (int sample = 0; sample < number_of_samples; ++sample) {
+ memcpy(tmp, data_ptr, sample_offset);
+
+ for (int channel = 0; channel < channels; ++channel) {
+ memcpy(data_ptr[sample_size * channel_ordering[channel]], tmp[sample_size * channel], sample_size);
+ }
+
+ data_ptr += sample_offset;
+ }
+ return 0;
+}
+
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
{
KLVPacket klv;
@@ -3726,6 +3982,15 @@ static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
return ret;
}
+ // for audio, process audio remapping if MCA label requires it
+ if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && track->require_reordering && !mxf->skip_audio_reordering) {
+ int byte_per_sample = st->codecpar->bits_per_coded_sample / 8;
+ ret = mxf_audio_remapping(track->channel_ordering, pkt->data, pkt->size, byte_per_sample, st->codecpar->channels);
+ if (ret < 0) {
+ return ret;
+ }
+ }
+
/* seek for truncated packets */
avio_seek(s->pb, klv.next_klv, SEEK_SET);
@@ -3913,6 +4178,9 @@ static const AVOption options[] = {
{ "eia608_extract", "extract eia 608 captions from s436m track",
offsetof(MXFContext, eia608_extract), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1,
AV_OPT_FLAG_DECODING_PARAM },
+ { "skip_audio_reordering", "skip audio reordering based on Multi-Channel Audio labelling",
+ offsetof(MXFContext, skip_audio_reordering), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1,
+ AV_OPT_FLAG_DECODING_PARAM },
{ NULL },
};
--
2.33.1
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