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Auto insert scale filter to convert colrospaces when needed

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Commited in SoC by Bobby Bingham on 2007-08-20 05:24:57

Originally committed as revision 12021 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak 2008-02-15 21:38:58 +00:00
parent 2a553ef529
commit d21cbbff0b
1 changed files with 66 additions and 10 deletions
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76
libavfilter/avfilter.c
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@ -96,33 +96,77 @@ int avfilter_link(AVFilterContext *src, unsigned srcpad,
return 0;
}
static int common_format(int *fmts0, int *fmts1)
{
int i, j;
for(i = 0; fmts0[i] != -1; i ++)
for(j = 0; fmts1[j] != -1; j ++)
if(fmts0[i] == fmts1[j])
return fmts0[i];
return -1;
}
int avfilter_config_link(AVFilterLink *link)
{
int *fmts[2], i, j;
int *fmts[3] = {NULL,NULL,NULL};
int (*config_link)(AVFilterLink *);
int *(*query_formats)(AVFilterLink *link);
AVFilterContext *scale;
AVFilterLink *link2 = NULL;
if(!link)
return 0;
/* find a format both filters support - TODO: auto-insert conversion filter */
link->format = -1;
/* find a format both filters support */
if(!(query_formats = link_spad(link).query_formats))
query_formats = avfilter_default_query_output_formats;
fmts[0] = query_formats(link);
fmts[1] = link_dpad(link).query_formats(link);
for(i = 0; fmts[0][i] != -1; i ++)
for(j = 0; fmts[1][j] != -1; j ++)
if(fmts[0][i] == fmts[1][j]) {
link->format = fmts[0][i];
goto format_done;
}
if((link->format = common_format(fmts[0], fmts[1])) == -1) {
/* no common format found. insert scale filter to convert */
if(!(scale = avfilter_open(&avfilter_vf_scale, NULL)))
goto format_done;
if(scale->filter->init(scale, NULL, NULL)) {
avfilter_destroy(scale);
goto format_done;
}
link->dst->inputs[link->dstpad] = NULL;
if(avfilter_link(scale, 0, link->dst, link->dstpad)) {
link->dst->inputs[link->dstpad] = link;
goto format_done;
}
link2 = scale->outputs[0];
link->dst = scale;
link->dstpad = 0;
scale->inputs[0] = link;
/* now try again to find working colorspaces.
* XXX: is it safe to assume that the scale filter always supports the
* same input and output colorspaces? */
fmts[2] = scale->input_pads[0].query_formats(link);
link->format = common_format(fmts[0], fmts[2]);
link2->format = common_format(fmts[1], fmts[2]);
}
format_done:
av_free(fmts[0]);
av_free(fmts[1]);
if(link->format == -1)
av_free(fmts[2]);
if(link->format == -1 || (link2 && link2->format == -1)) {
if(link2) {
link->dst = link2->dst;
link->dstpad = link2->dstpad;
link->dst->inputs[link->dstpad] = link;
link->format = -1;
avfilter_destroy(scale);
av_free(link2);
}
return -1;
}
if(!(config_link = link_spad(link).config_props))
config_link = avfilter_default_config_output_link;
@ -134,6 +178,18 @@ format_done:
if(config_link(link))
return -1;
if(link2) {
if(!(config_link = link_spad(link2).config_props))
config_link = avfilter_default_config_output_link;
if(config_link(link2))
return -1;
if(!(config_link = link_dpad(link2).config_props))
config_link = avfilter_default_config_input_link;
if(config_link(link2))
return -1;
}
return 0;
}