ffmpeg | branch: master | Elias Carotti <eliascrt _at_ amazon _dot_ .it> | Fri Sep 15 20:05:43 2023 +0200| [644b2235c5bb1e3ee89a92180d87796ec4c18ec8] | committer: Anton Khirnov
avcodec/libx264: Add the SSE computation for libx264. Since libx264 only provides a per-frame per-channel PSNR, this is inverted to get back the SSE. Signed-off-by: Anton Khirnov <[email protected]> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=644b2235c5bb1e3ee89a92180d87796ec4c18ec8 --- libavcodec/libx264.c | 31 ++++++++++++++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-) diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c index 77a9f173b4..182e20f622 100644 --- a/libavcodec/libx264.c +++ b/libavcodec/libx264.c @@ -726,7 +726,36 @@ FF_ENABLE_DEPRECATION_WARNINGS pkt->flags |= AV_PKT_FLAG_KEY*pic_out.b_keyframe; if (ret) { - ff_side_data_set_encoder_stats(pkt, (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA, NULL, 0, pict_type); + int error_count = 0; + int64_t *errors = NULL; + int64_t sse[3] = {0}; + + if (ctx->flags & AV_CODEC_FLAG_PSNR) { + const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(ctx->pix_fmt); + double scale[3] = { 1, + (double)(1 << pix_desc->log2_chroma_h) * (1 << pix_desc->log2_chroma_w), + (double)(1 << pix_desc->log2_chroma_h) * (1 << pix_desc->log2_chroma_w), + }; + + error_count = pix_desc->nb_components; + + for (int i = 0; i < pix_desc->nb_components; ++i) { + double max_value = (double)(1 << pix_desc->comp[i].depth) - 1.0; + double plane_size = ctx->width * (double)ctx->height / scale[i]; + + /* psnr = 10 * log10(max_value * max_value / mse) */ + double mse = (max_value * max_value) / pow(10, pic_out.prop.f_psnr[i] / 10.0); + + /* SSE = MSE * width * height / scale -> because of possible chroma downsampling */ + sse[i] = (int64_t)floor(mse * plane_size + .5); + }; + + errors = sse; + } + + ff_side_data_set_encoder_stats(pkt, (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA, + errors, error_count, pict_type); + if (wallclock) ff_side_data_set_prft(pkt, wallclock); } _______________________________________________ ffmpeg-cvslog mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
