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videoconvert: only chroma subsample when needed

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This commit is contained in:
Wim Taymans 2013-09-03 17:37:14 +02:00
parent 10b3b88e9c
commit c731f1cba0
1 changed files with 22 additions and 12 deletions
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34
gst/videoconvert/videoconvert.c
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@ -394,9 +394,23 @@ videoconvert_convert_compute_resample (VideoConvert * convert)
width = convert->width;
convert->upsample = gst_video_chroma_resample_new (0,
in_info->chroma_site, 0, sfinfo->unpack_format, sfinfo->w_sub[2],
sfinfo->h_sub[2]);
if (sfinfo->w_sub[2] != dfinfo->w_sub[2] ||
sfinfo->h_sub[2] != dfinfo->h_sub[2] ||
in_info->chroma_site != out_info->chroma_site) {
convert->upsample = gst_video_chroma_resample_new (0,
in_info->chroma_site, 0, sfinfo->unpack_format, sfinfo->w_sub[2],
sfinfo->h_sub[2]);
convert->downsample = gst_video_chroma_resample_new (0,
out_info->chroma_site, 0, dfinfo->unpack_format, -dfinfo->w_sub[2],
-dfinfo->h_sub[2]);
} else {
convert->upsample = NULL;
convert->downsample = NULL;
}
if (convert->upsample) {
gst_video_chroma_resample_get_info (convert->upsample,
&convert->up_n_lines, &convert->up_offset);
@ -404,12 +418,6 @@ videoconvert_convert_compute_resample (VideoConvert * convert)
convert->up_n_lines = 1;
convert->up_offset = 0;
}
GST_DEBUG ("upsample: %p, site: %d, offset %d, n_lines %d", convert->upsample,
in_info->chroma_site, convert->up_offset, convert->up_n_lines);
convert->downsample = gst_video_chroma_resample_new (0,
out_info->chroma_site, 0, dfinfo->unpack_format, -dfinfo->w_sub[2],
-dfinfo->h_sub[2]);
if (convert->downsample) {
gst_video_chroma_resample_get_info (convert->downsample,
&convert->down_n_lines, &convert->down_offset);
@ -417,7 +425,8 @@ videoconvert_convert_compute_resample (VideoConvert * convert)
convert->down_n_lines = 1;
convert->down_offset = 0;
}
GST_DEBUG ("upsample: %p, site: %d, offset %d, n_lines %d", convert->upsample,
in_info->chroma_site, convert->up_offset, convert->up_n_lines);
GST_DEBUG ("downsample: %p, site: %d, offset %d, n_lines %d",
convert->downsample, out_info->chroma_site, convert->down_offset,
convert->down_n_lines);
@ -574,10 +583,11 @@ videoconvert_convert_generic (VideoConvert * convert, GstVideoFrame * dest,
start = 0;
while (out_lines >= down_n_lines) {
GST_DEBUG ("doing downsample %u", start);
if (convert->downsample)
if (convert->downsample) {
GST_DEBUG ("doing downsample %u", start);
gst_video_chroma_resample (convert->downsample,
&out_tmplines[start], width);
}
for (j = 0; j < down_n_lines; j += lines) {
idx = down_offset + j;