[FFmpeg-devel] [PATCH 1/2] avformat/mxf: support MCA audio information
Marc-Antoine Arnaud
marc-antoine.arnaud at luminvent.com
Fri Dec 3 11:57:41 EET 2021
---
doc/demuxers.texi | 10 ++
libavformat/mxf.h | 3 +
libavformat/mxfdec.c | 335 +++++++++++++++++++++++++++++++++++++++++-
libavformat/version.h | 2 +-
4 files changed, 343 insertions(+), 7 deletions(-)
diff --git a/doc/demuxers.texi b/doc/demuxers.texi
index cab8a7072c..23b6753602 100644
--- a/doc/demuxers.texi
+++ b/doc/demuxers.texi
@@ -770,6 +770,16 @@ MJPEG stream. Turning this option on by setting it to 1 will result in a stricte
of the boundary value.
@end table
+ at section mxf
+
+MXF demuxer.
+
+ at table @option
+
+ at item -skip_audio_reordering @var{bool}
+This option will disable the audio reordering based on Multi-Channel Audio (MCA) labelling (SMPTE ST-377-4).
+ at end table
+
@section rawvideo
Raw video demuxer.
diff --git a/libavformat/mxf.h b/libavformat/mxf.h
index fe9c52732c..d53a16df51 100644
--- a/libavformat/mxf.h
+++ b/libavformat/mxf.h
@@ -50,6 +50,9 @@ enum MXFMetadataSetType {
TaggedValue,
TapeDescriptor,
AVCSubDescriptor,
+ AudioChannelLabelSubDescriptor,
+ SoundfieldGroupLabelSubDescriptor,
+ GroupOfSoundfieldGroupsLabelSubDescriptor,
};
enum MXFFrameLayout {
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index af9d33f796..6e1da75542 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 +224,18 @@ typedef struct MXFDescriptor {
size_t coll_size;
} MXFDescriptor;
+typedef struct MXFMCASubDescriptor {
+ MXFMetadataSet meta;
+ UID uid;
+ UID mca_link_id;
+ UID soundfield_group_link_id;
+ UID *group_of_soundfield_groups_link_id_refs;
+ int group_of_soundfield_groups_link_id_count;
+ UID mca_label_dictionary_id;
+ int mca_channel_id;
+ char *language;
+} MXFMCASubDescriptor;
+
typedef struct MXFIndexTableSegment {
MXFMetadataSet meta;
int edit_unit_byte_count;
@@ -290,6 +309,7 @@ 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 +331,7 @@ 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 };
+
/* 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 +344,17 @@ 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_group_of_soundfield_groups_link_id[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x01,0x03,0x07,0x01,0x04,0x00,0x00,0x00 };
+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_mca_channel_id[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x01,0x03,0x04,0x0a,0x00,0x00,0x00,0x00 };
+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 +375,13 @@ 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 AudioChannelLabelSubDescriptor:
+ case SoundfieldGroupLabelSubDescriptor:
+ case GroupOfSoundfieldGroupsLabelSubDescriptor:
+ av_freep(&((MXFMCASubDescriptor *)*ctx)->language);
+ av_freep(&((MXFMCASubDescriptor *)*ctx)->group_of_soundfield_groups_link_id_refs);
break;
case Sequence:
av_freep(&((MXFSequence *)*ctx)->structural_components_refs);
@@ -906,6 +945,30 @@ 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;
@@ -1360,11 +1423,40 @@ 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))
+ return 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->soundfield_group_link_id, 16);
+
+ if (IS_KLV_KEY(uid, mxf_group_of_soundfield_groups_link_id))
+ return mxf_read_strong_ref_array(pb, &mca_sub_descriptor->group_of_soundfield_groups_link_id_refs, &mca_sub_descriptor->group_of_soundfield_groups_link_id_count);
+
+ if (IS_KLV_KEY(uid, mxf_mca_channel_id))
+ mca_sub_descriptor->mca_channel_id = avio_rb32(pb);
+
+ 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;
@@ -1494,6 +1586,50 @@ 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 MXFChannelOrderingUL {
+ UID uid;
+ uint64_t layout_mask;
+ 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 }, AV_CH_FRONT_LEFT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Left
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x02,0x00,0x00,0x00,0x00 }, AV_CH_FRONT_RIGHT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Right
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x03,0x00,0x00,0x00,0x00 }, AV_CH_FRONT_CENTER, AV_AUDIO_SERVICE_TYPE_MAIN }, // Center
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x04,0x00,0x00,0x00,0x00 }, AV_CH_LOW_FREQUENCY, AV_AUDIO_SERVICE_TYPE_MAIN }, // Low Frequency Effects
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x05,0x00,0x00,0x00,0x00 }, AV_CH_SIDE_LEFT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Left Surround
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x06,0x00,0x00,0x00,0x00 }, AV_CH_SIDE_RIGHT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Right Surround
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x07,0x00,0x00,0x00,0x00 }, AV_CH_SIDE_LEFT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Left Side Surround
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x08,0x00,0x00,0x00,0x00 }, AV_CH_SIDE_RIGHT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Right Side Surround
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x09,0x00,0x00,0x00,0x00 }, AV_CH_BACK_LEFT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Left Rear Surround
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x0a,0x00,0x00,0x00,0x00 }, AV_CH_BACK_RIGHT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Right Rear Surround
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x0b,0x00,0x00,0x00,0x00 }, AV_CH_FRONT_LEFT_OF_CENTER, AV_AUDIO_SERVICE_TYPE_MAIN }, // Left Center
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x0c,0x00,0x00,0x00,0x00 }, AV_CH_FRONT_RIGHT_OF_CENTER, AV_AUDIO_SERVICE_TYPE_MAIN }, // Right Center
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x0d,0x00,0x00,0x00,0x00 }, AV_CH_BACK_CENTER, AV_AUDIO_SERVICE_TYPE_MAIN }, // Center Surround
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x0e,0x00,0x00,0x00,0x00 }, AV_CH_FRONT_CENTER, 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 }, AV_CH_FRONT_CENTER, AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED }, // Visually impaired narrative audio channel
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x01,0x00,0x00 }, AV_CH_TOP_FRONT_LEFT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Left Height
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x02,0x00,0x00 }, AV_CH_TOP_FRONT_RIGHT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Right Height
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x03,0x00,0x00 }, AV_CH_TOP_FRONT_CENTER, AV_AUDIO_SERVICE_TYPE_MAIN }, // Center Height
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x04,0x00,0x00 }, AV_CH_TOP_SIDE_LEFT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Left Surround Height
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x05,0x00,0x00 }, AV_CH_TOP_SIDE_RIGHT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Right Surround Height
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x06,0x00,0x00 }, AV_CH_TOP_SIDE_LEFT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Left Side Surround Height
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x07,0x00,0x00 }, AV_CH_TOP_SIDE_RIGHT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Right Side Surround Height
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x08,0x00,0x00 }, AV_CH_TOP_BACK_LEFT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Left Rear Surround Height
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x09,0x00,0x00 }, AV_CH_TOP_BACK_RIGHT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Right Rear Surround Height
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x0a,0x00,0x00 }, AV_CH_TOP_SIDE_LEFT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Left Top Surround
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x0b,0x00,0x00 }, AV_CH_TOP_SIDE_RIGHT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Right Top Surround
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x0c,0x00,0x00 }, AV_CH_TOP_CENTER, AV_AUDIO_SERVICE_TYPE_MAIN }, // Top Surround
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x0d,0x00,0x00 }, AV_CH_LOW_FREQUENCY, AV_AUDIO_SERVICE_TYPE_MAIN }, // Left Front Subwoofer
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x0e,0x00,0x00 }, AV_CH_LOW_FREQUENCY_2, AV_AUDIO_SERVICE_TYPE_MAIN }, // Right Front Subwoofer
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x0f,0x00,0x00 }, AV_CH_TOP_BACK_CENTER, AV_AUDIO_SERVICE_TYPE_MAIN }, // Center Rear Height
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x10,0x00,0x00 }, AV_CH_BACK_CENTER, AV_AUDIO_SERVICE_TYPE_MAIN }, // Center Rear
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x11,0x00,0x00 }, AV_CH_BOTTOM_FRONT_LEFT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Left Below
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x12,0x00,0x00 }, AV_CH_BOTTOM_FRONT_RIGHT, AV_AUDIO_SERVICE_TYPE_MAIN }, // Right Below
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0d,0x03,0x02,0x01,0x30,0x01,0x13,0x00,0x00 }, AV_CH_BOTTOM_FRONT_CENTER, AV_AUDIO_SERVICE_TYPE_MAIN }, // Center Below
+ { { 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;
@@ -2292,6 +2428,156 @@ 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 MXFMCASubDescriptor *find_mca_link_id(MXFContext *mxf, enum MXFMetadataSetType type, UID *mca_link_id)
+{
+ for (int k = 0; k < mxf->metadata_sets_count; k++) {
+ MXFMCASubDescriptor *group = (MXFMCASubDescriptor*)mxf->metadata_sets[k];
+ if (group->meta.type == type && !memcmp(&group->mca_link_id, mca_link_id, 16))
+ return group;
+ }
+ return NULL;
+}
+
+static int parse_mca_labels(MXFContext *mxf, MXFTrack *source_track, MXFDescriptor *descriptor, AVStream *st)
+{
+ uint64_t routing[FF_SANE_NB_CHANNELS] = {0};
+ char *language = NULL;
+ int ambigous_language = 0;
+ enum AVAudioServiceType service_type = AV_AUDIO_SERVICE_TYPE_NB;
+ int ambigous_service_type = 0;
+ int has_channel_label = 0;
+
+ for (int i = 0; i < descriptor->sub_descriptors_count; i++) {
+ char *channel_language;
+
+ MXFMCASubDescriptor *label = mxf_resolve_strong_ref(mxf, &descriptor->sub_descriptors_refs[i], AudioChannelLabelSubDescriptor);
+ if (label == NULL)
+ continue;
+
+ has_channel_label = 1;
+ for (const MXFChannelOrderingUL* channel_ordering = mxf_channel_ordering; channel_ordering->uid[0]; channel_ordering++) {
+ if (IS_KLV_KEY(channel_ordering->uid, label->mca_label_dictionary_id)) {
+ int target_channel = label->mca_channel_id;
+ if (target_channel == 0 && descriptor->channels == 1)
+ target_channel = 1;
+ if (target_channel <= 0 || target_channel > descriptor->channels) {
+ av_log(mxf->fc, AV_LOG_ERROR, "AudioChannelLabelSubDescriptor has invalid MCA channel ID %d\n", target_channel);
+ return AVERROR_INVALIDDATA;
+ }
+ routing[target_channel - 1] = channel_ordering->layout_mask;
+ if (service_type == AV_AUDIO_SERVICE_TYPE_NB)
+ service_type = channel_ordering->service_type;
+ else if (service_type != channel_ordering->service_type)
+ ambigous_service_type = 1;
+ break;
+ }
+ }
+
+ channel_language = label->language;
+ if (!channel_language) {
+ MXFMCASubDescriptor *group = find_mca_link_id(mxf, SoundfieldGroupLabelSubDescriptor, &label->soundfield_group_link_id);
+ if (group) {
+ channel_language = group->language;
+ if (!channel_language && group->group_of_soundfield_groups_link_id_count) {
+ MXFMCASubDescriptor *supergroup = find_mca_link_id(mxf, GroupOfSoundfieldGroupsLabelSubDescriptor,
+ group->group_of_soundfield_groups_link_id_refs);
+ if (supergroup)
+ channel_language = supergroup->language;
+ }
+ }
+ }
+ if (channel_language) {
+ if (language && strcmp(language, channel_language))
+ ambigous_language = 1;
+ else
+ language = channel_language;
+ }
+ }
+
+ if (language && !ambigous_language) {
+ int ret = set_language(mxf->fc, language, &st->metadata);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (service_type != AV_AUDIO_SERVICE_TYPE_NB && service_type != AV_AUDIO_SERVICE_TYPE_MAIN && !ambigous_service_type) {
+ enum AVAudioServiceType *ast;
+ uint8_t* side_data = av_stream_new_side_data(st, AV_PKT_DATA_AUDIO_SERVICE_TYPE, sizeof(*ast));
+ if (!side_data)
+ return AVERROR(ENOMEM);
+ ast = (enum AVAudioServiceType*)side_data;
+ *ast = service_type;
+ }
+
+ if (has_channel_label) {
+ uint64_t channel_layout = 0;
+ int require_reorder = 0;
+
+ for (int i = 0; i < descriptor->channels; i++) {
+ if (!routing[i]) {
+ av_log(mxf->fc, AV_LOG_WARNING, "Designation of audio channel %d in stream #%d is unknown or unsupported, "
+ "falling back to unknown channel layout\n", st->index, i);
+ return 0;
+ }
+ if (channel_layout & routing[i]) {
+ av_log(mxf->fc, AV_LOG_WARNING, "%s audio channel is used multiple times in stream #%d, "
+ "falling back to unknown channel layout\n",
+ av_get_channel_name(routing[i]), st->index);
+ return 0;
+ }
+ if (routing[i] < channel_layout)
+ require_reorder = 1;
+ channel_layout |= routing[i];
+ }
+
+ av_assert0(descriptor->channels == av_get_channel_layout_nb_channels(channel_layout));
+
+ if (require_reorder) {
+ if (mxf->skip_audio_reordering)
+ return 0;
+ if (!is_pcm(st->codecpar->codec_id)) {
+ av_log(mxf->fc, AV_LOG_WARNING, "Audio channel reordering for stream #%d is not supported because it is using a non-PCM codec, "
+ "falling back to unknown channel layout\n", st->index);
+ return 0;
+ }
+ av_log(mxf->fc, AV_LOG_VERBOSE, "MCA mapping for stream #%d: ", st->index);
+ for (int j = 0; j < descriptor->channels; j++) {
+ int reordered_channel = av_get_channel_layout_channel_index(channel_layout, routing[j]);
+ av_assert0(reordered_channel >= 0 && reordered_channel < descriptor->channels);
+ source_track->channel_ordering[j] = reordered_channel;
+ av_log(mxf->fc, AV_LOG_VERBOSE, "%s%s: %d->%d", j ? ", " : "", av_get_channel_name(routing[j]), j, reordered_channel);
+ }
+ av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
+ source_track->require_reordering = 1;
+ }
+
+ st->codecpar->channel_layout = channel_layout;
+ }
+
+ return 0;
+}
+
static int mxf_parse_structural_metadata(MXFContext *mxf)
{
MXFPackage *material_package = NULL;
@@ -2688,6 +2974,15 @@ static int mxf_parse_structural_metadata(MXFContext *mxf)
sti->need_parsing = AVSTREAM_PARSE_FULL;
}
st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
+
+ if (descriptor->channels <= 0 || descriptor->channels >= FF_SANE_NB_CHANNELS) {
+ av_log(mxf->fc, AV_LOG_ERROR, "Invalid number of channels %d, must be less than %d\n", descriptor->channels, FF_SANE_NB_CHANNELS);
+ return AVERROR_INVALIDDATA;
+ }
+
+ ret = parse_mca_labels(mxf, source_track, descriptor, st);
+ if (ret < 0)
+ return ret;
} 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);
@@ -2888,6 +3183,9 @@ 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,0x01,0x01,0x01,0x01,0x01,0x6b,0x00 }, mxf_read_mca_sub_descriptor, sizeof(MXFMCASubDescriptor), AudioChannelLabelSubDescriptor },
+ { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x6c,0x00 }, mxf_read_mca_sub_descriptor, sizeof(MXFMCASubDescriptor), SoundfieldGroupLabelSubDescriptor },
+ { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x6d,0x00 }, mxf_read_mca_sub_descriptor, sizeof(MXFMCASubDescriptor), GroupOfSoundfieldGroupsLabelSubDescriptor },
{ { 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 },
@@ -3187,12 +3485,6 @@ 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;
@@ -3619,6 +3911,25 @@ 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;
+
+ 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;
@@ -3733,6 +4044,15 @@ 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) {
+ 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);
@@ -3920,6 +4240,9 @@ 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 },
};
diff --git a/libavformat/version.h b/libavformat/version.h
index 0705ee4112..21ca6ed096 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -33,7 +33,7 @@
// Also please add any ticket numbers that you believe might be affected here
#define LIBAVFORMAT_VERSION_MAJOR 59
#define LIBAVFORMAT_VERSION_MINOR 9
-#define LIBAVFORMAT_VERSION_MICRO 102
+#define LIBAVFORMAT_VERSION_MICRO 103
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \
--
2.33.1
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