Signed-off-by: Nicolas George <geo...@nsup.org>
---
libavutil/pixdesc.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libavutil/pixdesc.c b/libavutil/pixdesc.c
index 6e57a82cb6..923a61b0ab 100644
--- a/libavutil/pixdesc.c
+++ b/libavutil/pixdesc.c
@@ -2866,6 +2866,7 @@ static int get_pix_fmt_score(enum AVPixelFormat
dst_pix_fmt,
else
nb_components = FFMIN(src_desc->nb_components,
dst_desc->nb_components);
+ // Penalty for losing depth
for (i = 0; i < nb_components; i++) {
int depth_minus1 = (dst_pix_fmt == AV_PIX_FMT_PAL8) ? 7/nb_components
: (dst_desc->comp[i].depth - 1);
if (src_desc->comp[i].depth - 1 > depth_minus1 && (consider &
FF_LOSS_DEPTH)) {
@@ -2874,6 +2875,7 @@ static int get_pix_fmt_score(enum AVPixelFormat
dst_pix_fmt,
}
}
+ // Penalty for subsampling
if (consider & FF_LOSS_RESOLUTION) {
if (dst_desc->log2_chroma_w > src_desc->log2_chroma_w) {
loss |= FF_LOSS_RESOLUTION;
@@ -2890,6 +2892,7 @@ static int get_pix_fmt_score(enum AVPixelFormat
dst_pix_fmt,
}
}
+ // Penalty for changing colorspace
if(consider & FF_LOSS_COLORSPACE)
switch(dst_color) {
case FF_COLOR_RGB:
@@ -2920,15 +2923,18 @@ static int get_pix_fmt_score(enum AVPixelFormat
dst_pix_fmt,
if(loss & FF_LOSS_COLORSPACE)
score -= (nb_components * 65536) >> FFMIN(dst_desc->comp[0].depth - 1,
src_desc->comp[0].depth - 1);
+ // Penalty for changing chroma
if (dst_color == FF_COLOR_GRAY &&
src_color != FF_COLOR_GRAY && (consider & FF_LOSS_CHROMA)) {
loss |= FF_LOSS_CHROMA;
score -= 2 * 65536;
}
+ // Penalty for losing alpha
if (!pixdesc_has_alpha(dst_desc) && (pixdesc_has_alpha(src_desc) &&
(consider & FF_LOSS_ALPHA))) {
loss |= FF_LOSS_ALPHA;
score -= 65536;
}
+ // Penalty for using a palette
if (dst_pix_fmt == AV_PIX_FMT_PAL8 && (consider & FF_LOSS_COLORQUANT) &&
(src_pix_fmt != AV_PIX_FMT_PAL8 && (src_color != FF_COLOR_GRAY ||
(pixdesc_has_alpha(src_desc) && (consider & FF_LOSS_ALPHA))))) {
loss |= FF_LOSS_COLORQUANT;
--
2.35.1
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