[FFmpeg-devel] [PATCH 1/2] avformat/mxf: support MCA audio information
Marton Balint
cus at passwd.hu
Fri Dec 17 20:12:17 EET 2021
On Fri, 17 Dec 2021, Marc-Antoine ARNAUD wrote:
> Hi all,
>
> Can I have an update on this patch submission ?
> Is something required to be done before it can be merged ?
New channel layout API is on its way, which makes in-demuxer channel
reordering uneeded. Therefore the reordering option should not be added
as it is in this patch. I can rework the patch after the channel layout
API is in. (should happen in a couple of weeks at most).
Regards,
Marton
>
> Thanks you,
> Marc-Antoine
>
>
> Le ven. 3 déc. 2021 à 10:57, Marc-Antoine Arnaud
> <marc-antoine.arnaud at luminvent.com> a écrit :
>>
>> ---
>> 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
>>
>
>
> --
> Marc-Antoine ARNAUD
> CEO & Founder
>
> mobile: +33 6 84 71 84 45
> email: arnaud.marc-antoine at luminvent.com
> website: luminvent.com
> _______________________________________________
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> ffmpeg-devel at ffmpeg.org
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