[FFmpeg-devel] [PATCH v5 1/3] avformat/flvdec: support enhanced flv PacketTypeMetadata
Steven Liu
lingjiujianke at gmail.com
Mon Mar 18 11:09:00 EET 2024
Steven Liu <lingjiujianke at gmail.com> 于2024年3月7日周四 17:33写道：
>
> zhupengfei via ffmpeg-devel <ffmpeg-devel at ffmpeg.org> 于2024年3月4日周一 21:52写道：
> >
> > From: Zhu Pengfei <411294962 at qq.com>
> >
> > Signed-off-by: Zhu Pengfei <411294962 at qq.com>
> > ---
> > libavformat/flvdec.c | 177 ++++++++++++++++++++++++++++++++++++++++++-
> > 1 file changed, 176 insertions(+), 1 deletion(-)
> >
> > diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
> > index e25b5bd163..2a0aec7291 100644
> > --- a/libavformat/flvdec.c
> > +++ b/libavformat/flvdec.c
> > @@ -33,6 +33,7 @@
> > #include "libavutil/internal.h"
> > #include "libavutil/intfloat.h"
> > #include "libavutil/intreadwrite.h"
> > +#include "libavutil/mastering_display_metadata.h"
> > #include "libavutil/mathematics.h"
> > #include "avformat.h"
> > #include "demux.h"
> > @@ -45,6 +46,28 @@
> >
> > #define MAX_DEPTH 16 ///< arbitrary limit to prevent unbounded recursion
> >
> > +typedef struct FLVMasteringMeta {
> > + double r_x;
> > + double r_y;
> > + double g_x;
> > + double g_y;
> > + double b_x;
> > + double b_y;
> > + double white_x;
> > + double white_y;
> > + double max_luminance;
> > + double min_luminance;
> > +} FLVMasteringMeta;
> > +
> > +typedef struct FLVMetaVideoColor {
> > + uint64_t matrix_coefficients;
> > + uint64_t transfer_characteristics;
> > + uint64_t primaries;
> > + uint64_t max_cll;
> > + uint64_t max_fall;
> > + FLVMasteringMeta mastering_meta;
> > +} FLVMetaVideoColor;
> > +
> > typedef struct FLVContext {
> > const AVClass *class; ///< Class for private options.
> > int trust_metadata; ///< configure streams according onMetaData
> > @@ -80,6 +103,8 @@ typedef struct FLVContext {
> > int64_t time_offset;
> > int64_t time_pos;
> >
> > + FLVMetaVideoColor *metaVideoColor;
> > + int meta_color_info_flag;
> > } FLVContext;
> >
> > /* AMF date type */
> > @@ -524,6 +549,7 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream,
> > FLVContext *flv = s->priv_data;
> > AVIOContext *ioc;
> > AMFDataType amf_type;
> > + FLVMetaVideoColor *meta_video_color = flv->metaVideoColor;
> > char str_val[1024];
> > double num_val;
> > amf_date date;
> > @@ -672,6 +698,43 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream,
> > }
> > }
> >
> > + if (meta_video_color) {
> > + if (amf_type == AMF_DATA_TYPE_NUMBER ||
> > + amf_type == AMF_DATA_TYPE_BOOL) {
> > + if (!strcmp(key, "colorPrimaries")) {
> > + meta_video_color->primaries = num_val;
> > + } else if (!strcmp(key, "transferCharacteristics")) {
> > + meta_video_color->transfer_characteristics = num_val;
> > + } else if (!strcmp(key, "matrixCoefficients")) {
> > + meta_video_color->matrix_coefficients = num_val;
> > + } else if (!strcmp(key, "maxFall")) {
> > + meta_video_color->max_fall = num_val;
> > + } else if (!strcmp(key, "maxCLL")) {
> > + meta_video_color->max_cll = num_val;
> > + } else if (!strcmp(key, "redX")) {
> > + meta_video_color->mastering_meta.r_x = num_val;
> > + } else if (!strcmp(key, "redY")) {
> > + meta_video_color->mastering_meta.r_y = num_val;
> > + } else if (!strcmp(key, "greenX")) {
> > + meta_video_color->mastering_meta.g_x = num_val;
> > + } else if (!strcmp(key, "greenY")) {
> > + meta_video_color->mastering_meta.g_y = num_val;
> > + } else if (!strcmp(key, "blueX")) {
> > + meta_video_color->mastering_meta.b_x = num_val;
> > + } else if (!strcmp(key, "blueY")) {
> > + meta_video_color->mastering_meta.b_y = num_val;
> > + } else if (!strcmp(key, "whitePointX")) {
> > + meta_video_color->mastering_meta.white_x = num_val;
> > + } else if (!strcmp(key, "whitePointY")) {
> > + meta_video_color->mastering_meta.white_y = num_val;
> > + } else if (!strcmp(key, "maxLuminance")) {
> > + meta_video_color->mastering_meta.max_luminance = num_val;
> > + } else if (!strcmp(key, "minLuminance")) {
> > + meta_video_color->mastering_meta.min_luminance = num_val;
> > + }
> > + }
> > + }
> > +
> > if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
> > ((!apar && !strcmp(key, "audiocodecid")) ||
> > (!vpar && !strcmp(key, "videocodecid"))))
> > @@ -824,6 +887,7 @@ static int flv_read_close(AVFormatContext *s)
> > av_freep(&flv->new_extradata[i]);
> > av_freep(&flv->keyframe_times);
> > av_freep(&flv->keyframe_filepositions);
> > + av_freep(&flv->metaVideoColor);
> > return 0;
> > }
> >
> > @@ -1028,6 +1092,103 @@ static int resync(AVFormatContext *s)
> > return AVERROR_EOF;
> > }
> >
> > +static int flv_parse_video_color_info(AVFormatContext *s, AVStream *st, int64_t next_pos)
> > +{
> > + FLVContext *flv = s->priv_data;
> > + AMFDataType type;
> > + AVIOContext *ioc;
> > + char buffer[32];
> > + ioc = s->pb;
> > +
> > + // first object needs to be "colorInfo" string
> > + type = avio_r8(ioc);
> > + if (type != AMF_DATA_TYPE_STRING ||
> > + amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
> > + return TYPE_UNKNOWN;
> > +
> > + if (strcmp(buffer, "colorInfo")) {
> > + av_log(s, AV_LOG_DEBUG, "Unknown type %s\n", buffer);
> > + return TYPE_UNKNOWN;
> > + }
> > +
> > + if (!(flv->metaVideoColor = av_mallocz(sizeof(FLVMetaVideoColor)))) {
> > + return AVERROR(ENOMEM);
> > + }
> > + flv->meta_color_info_flag = 1;
> > + amf_parse_object(s, NULL, NULL, buffer, next_pos, 0); // parse metadata
> > + return 0;
> > +}
> > +
> > +static int flv_update_video_color_info(AVFormatContext *s, AVStream *st)
> > +{
> > + FLVContext *flv = s->priv_data;
> > + const FLVMetaVideoColor* meta_video_color = flv->metaVideoColor;
> > + const FLVMasteringMeta *mastering_meta = &meta_video_color->mastering_meta;
> > +
> > + int has_mastering_primaries, has_mastering_luminance;
> > + // Mastering primaries are CIE 1931 coords, and must be > 0.
> > + has_mastering_primaries =
> > + mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
> > + mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
> > + mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
> > + mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
> > + has_mastering_luminance = mastering_meta->max_luminance > 0 && mastering_meta->min_luminance > 0;
> > +
> > + if (meta_video_color->matrix_coefficients != AVCOL_SPC_RESERVED)
> > + st->codecpar->color_space = meta_video_color->matrix_coefficients;
> > + if (meta_video_color->primaries != AVCOL_PRI_RESERVED &&
> > + meta_video_color->primaries != AVCOL_PRI_RESERVED0)
> > + st->codecpar->color_primaries = meta_video_color->primaries;
> > + if (meta_video_color->transfer_characteristics != AVCOL_TRC_RESERVED &&
> > + meta_video_color->transfer_characteristics != AVCOL_TRC_RESERVED0)
> > + st->codecpar->color_trc = meta_video_color->transfer_characteristics;
> > +
> > + if (meta_video_color->max_cll && meta_video_color->max_fall) {
> > + size_t size = 0;
> > + AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
> > + if (!metadata)
> > + return AVERROR(ENOMEM);
> > + if (!av_packet_side_data_add(&st->codecpar->coded_side_data, &st->codecpar->nb_coded_side_data,
> > + AV_PKT_DATA_CONTENT_LIGHT_LEVEL, metadata, size, 0)) {
> > + av_freep(&metadata);
> > + return AVERROR(ENOMEM);
> > + }
> > + metadata->MaxCLL = meta_video_color->max_cll;
> > + metadata->MaxFALL = meta_video_color->max_fall;
> > + }
> > +
> > + if (has_mastering_primaries || has_mastering_luminance) {
> > + AVMasteringDisplayMetadata *metadata;
> > + AVPacketSideData *sd = av_packet_side_data_new(&st->codecpar->coded_side_data,
> > + &st->codecpar->nb_coded_side_data,
> > + AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
> > + sizeof(AVMasteringDisplayMetadata), 0);
> > + if (!sd)
> > + return AVERROR(ENOMEM);
> > + metadata = (AVMasteringDisplayMetadata*)sd->data;
> > + memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
> > + // hdrCll
> > + if (has_mastering_luminance) {
> > + metadata->max_luminance = av_d2q(mastering_meta->max_luminance, INT_MAX);
> > + metadata->min_luminance = av_d2q(mastering_meta->min_luminance, INT_MAX);
> > + metadata->has_luminance = 1;
> > + }
> > + // hdrMdcv
> > + if (has_mastering_primaries) {
> > + metadata->display_primaries[0][0] = av_d2q(mastering_meta->r_x, INT_MAX);
> > + metadata->display_primaries[0][1] = av_d2q(mastering_meta->r_y, INT_MAX);
> > + metadata->display_primaries[1][0] = av_d2q(mastering_meta->g_x, INT_MAX);
> > + metadata->display_primaries[1][1] = av_d2q(mastering_meta->g_y, INT_MAX);
> > + metadata->display_primaries[2][0] = av_d2q(mastering_meta->b_x, INT_MAX);
> > + metadata->display_primaries[2][1] = av_d2q(mastering_meta->b_y, INT_MAX);
> > + metadata->white_point[0] = av_d2q(mastering_meta->white_x, INT_MAX);
> > + metadata->white_point[1] = av_d2q(mastering_meta->white_y, INT_MAX);
> > + metadata->has_primaries = 1;
> > + }
> > + }
> > + return 0;
> > +}
> > +
> > static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
> > {
> > FLVContext *flv = s->priv_data;
> > @@ -1100,8 +1261,17 @@ retry:
> > video_codec_id = avio_rb32(s->pb);
> > size -= 4;
> > }
> > - if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_VIDEO_INFO_CMD)
> > +
> > + if (enhanced_flv && stream_type == FLV_STREAM_TYPE_VIDEO && (flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_VIDEO_INFO_CMD) {
> > + int pkt_type = flags & 0x0F;
> > + if (pkt_type == PacketTypeMetadata) {
> > + int ret = flv_parse_video_color_info(s, st, next);
> > + av_log(s, AV_LOG_DEBUG, "enhanced flv parse metadata ret %d and skip\n", ret);
> > + }
> > + goto skip;
> > + } else if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_VIDEO_INFO_CMD) {
> > goto skip;
> > + }
> > } else if (type == FLV_TAG_TYPE_META) {
> > stream_type=FLV_STREAM_TYPE_SUBTITLE;
> > if (size > 13 + 1 + 4) { // Header-type metadata stuff
> > @@ -1287,6 +1457,11 @@ retry_duration:
> > goto leave;
> > }
> >
> > + if (enhanced_flv && stream_type == FLV_STREAM_TYPE_VIDEO && flv->meta_color_info_flag) {
> > + flv_update_video_color_info(s, st); // update av packet side data
> > + flv->meta_color_info_flag = 0;
> > + }
> > +
> > if (st->codecpar->codec_id == AV_CODEC_ID_H264 || st->codecpar->codec_id == AV_CODEC_ID_MPEG4 ||
> > (st->codecpar->codec_id == AV_CODEC_ID_HEVC && type == PacketTypeCodedFrames)) {
> > // sign extension
> > --
> > 2.44.0
> >
> > _______________________________________________
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> > ffmpeg-devel at ffmpeg.org
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> >
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> > ffmpeg-devel-request at ffmpeg.org with subject "unsubscribe".
>
>
>
> Any comments?
Applied
Thanks
Steven
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