libx264 does have a field for opaque data to pass along with frames through the encoder, but it is a pointer, while the libavcodec reordered_opaque field is an int64_t. Therefore, allocate an array within the libx264 wrapper, where reordered_opaque values in flight are stored, and pass a pointer to this array to libx264.
Update the public libavcodec documentation for the AVCodecContext field to explain this usage, and add a codec capability that allows detecting whether an encoder handles this field. --- libavcodec/avcodec.h | 12 +++++++++++- libavcodec/libx264.c | 31 +++++++++++++++++++++++++++++-- 2 files changed, 40 insertions(+), 3 deletions(-) diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h index fb8e34e7d5..727e1c411d 100644 --- a/libavcodec/avcodec.h +++ b/libavcodec/avcodec.h @@ -899,6 +899,13 @@ typedef struct RcOverride{ */ #define AV_CODEC_CAP_HYBRID (1 << 18) +/** + * This codec takes the reordered_opaque field from input AVFrames + * and returns it in the corresponding field in AVCodecContext after + * encoding. + */ +#define AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE (1 << 19) + /** * Pan Scan area. * This specifies the area which should be displayed. @@ -2297,7 +2304,10 @@ typedef struct AVCodecContext { /** * opaque 64-bit number (generally a PTS) that will be reordered and * output in AVFrame.reordered_opaque - * - encoding: unused + * - encoding: Set by libavcodec to the reordered_opaque of the input + * frame corresponding to the last returned packet. Only + * supported by encoders with the + * AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE capability. * - decoding: Set by user. */ int64_t reordered_opaque; diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c index 3dc53aaf38..c852858db8 100644 --- a/libavcodec/libx264.c +++ b/libavcodec/libx264.c @@ -85,6 +85,9 @@ typedef struct X264Context { int noise_reduction; char *x264_params; + + int nb_reordered_opaque, next_reordered_opaque; + int64_t *reordered_opaque; } X264Context; static void X264_log(void *p, int level, const char *fmt, va_list args) @@ -240,6 +243,7 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame, x264_nal_t *nal; int nnal, i, ret; x264_picture_t pic_out; + int64_t *out_opaque; x264_picture_init( &x4->pic ); x4->pic.img.i_csp = x4->params.i_csp; @@ -259,6 +263,11 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame, x4->pic.i_pts = frame->pts; + x4->reordered_opaque[x4->next_reordered_opaque] = frame->reordered_opaque; + x4->pic.opaque = &x4->reordered_opaque[x4->next_reordered_opaque]; + x4->next_reordered_opaque++; + x4->next_reordered_opaque %= x4->nb_reordered_opaque; + switch (frame->pict_type) { case AV_PICTURE_TYPE_I: x4->pic.i_type = x4->forced_idr ? X264_TYPE_IDR @@ -288,6 +297,15 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame, pkt->pts = pic_out.i_pts; pkt->dts = pic_out.i_dts; + out_opaque = pic_out.opaque; + if (out_opaque >= x4->reordered_opaque && + out_opaque < &x4->reordered_opaque[x4->nb_reordered_opaque]) { + ctx->reordered_opaque = *out_opaque; + } else { + // Unexpected opaque pointer on picture output + ctx->reordered_opaque = 0; + } + #if FF_API_CODED_FRAME FF_DISABLE_DEPRECATION_WARNINGS switch (pic_out.i_type) { @@ -331,6 +349,7 @@ static av_cold int X264_close(AVCodecContext *avctx) av_freep(&avctx->extradata); av_freep(&x4->sei); + av_freep(&x4->reordered_opaque); if (x4->enc) { x264_encoder_close(x4->enc); @@ -663,6 +682,12 @@ FF_ENABLE_DEPRECATION_WARNINGS cpb_props->max_bitrate = x4->params.rc.i_vbv_max_bitrate * 1000; cpb_props->avg_bitrate = x4->params.rc.i_bitrate * 1000; + x4->nb_reordered_opaque = x264_encoder_maximum_delayed_frames(x4->enc) + 1; + x4->reordered_opaque = av_malloc_array(x4->nb_reordered_opaque, + sizeof(*x4->reordered_opaque)); + if (!x4->reordered_opaque) + return AVERROR(ENOMEM); + return 0; } @@ -850,7 +875,8 @@ AVCodec ff_libx264_encoder = { .init = X264_init, .encode2 = X264_frame, .close = X264_close, - .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS, + .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS | + AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE, .priv_class = &class, .defaults = x264_defaults, .init_static_data = X264_init_static, @@ -877,7 +903,8 @@ AVCodec ff_libx262_encoder = { .init = X264_init, .encode2 = X264_frame, .close = X264_close, - .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS, + .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS | + AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE, .priv_class = &X262_class, .defaults = x264_defaults, .pix_fmts = pix_fmts_8bit, -- 2.17.1 (Apple Git-112) _______________________________________________ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel