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avfilter/avfiltergraph: Implement and use find_best_sample_fmt_of_2()

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Similar to the pixel format code

Fixes Ticket3847

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-08-16 14:59:18 +02:00
parent b4b2717ffe
commit 0cb87cd7d4
1 changed files with 47 additions and 0 deletions
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47
libavfilter/avfiltergraph.c
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@ -631,6 +631,40 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
return 0;
}
static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
{
int score = 0;
if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
score ++;
if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
}else
score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_S32 &&
av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_FLT)
score += 20;
if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_FLT &&
av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_S32)
score += 2;
return score;
}
static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2,
enum AVSampleFormat src_fmt)
{
int score1, score2;
score1 = get_fmt_score(dst_fmt1, src_fmt);
score2 = get_fmt_score(dst_fmt2, src_fmt);
return score1 < score2 ? dst_fmt1 : dst_fmt2;
}
static int pick_format(AVFilterLink *link, AVFilterLink *ref)
{
if (!link || !link->in_formats)
@ -650,6 +684,19 @@ static int pick_format(AVFilterLink *link, AVFilterLink *ref)
av_get_pix_fmt_name(ref->format), has_alpha);
link->in_formats->formats[0] = best;
}
} else if (link->type == AVMEDIA_TYPE_AUDIO) {
if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
enum AVSampleFormat best= AV_SAMPLE_FMT_NONE;
int i;
for (i=0; i<link->in_formats->nb_formats; i++) {
enum AVSampleFormat p = link->in_formats->formats[i];
best = find_best_sample_fmt_of_2(best, p, ref->format);
}
av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
av_get_sample_fmt_name(best), link->in_formats->nb_formats,
av_get_sample_fmt_name(ref->format));
link->in_formats->formats[0] = best;
}
}
link->in_formats->nb_formats = 1;