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af_asyncts: fix request_frame() behavior. 

Make sure that an output frame has really been produced before returning
0.
This commit is contained in:
Anton Khirnov 2012-07-04 16:46:17 +02:00
parent 0dd283faca
commit 6f834293d3
1 changed files with 9 additions and 1 deletions
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10
libavfilter/af_asyncts.c
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@ -37,6 +37,9 @@ typedef struct ASyncContext {
int resample;
float min_delta_sec;
int max_comp;
/* set by filter_samples() to signal an output frame to request_frame() */
int got_output;
} ASyncContext;
#define OFFSET(x) offsetof(ASyncContext, x)
@ -117,9 +120,13 @@ static int request_frame(AVFilterLink *link)
{
AVFilterContext *ctx = link->src;
ASyncContext *s = ctx->priv;
int ret = ff_request_frame(ctx->inputs[0]);
int ret = 0;
int nb_samples;
s->got_output = 0;
while (ret >= 0 && !s->got_output)
ret = ff_request_frame(ctx->inputs[0]);
/* flush the fifo */
if (ret == AVERROR_EOF && (nb_samples = avresample_get_delay(s->avr))) {
AVFilterBufferRef *buf = ff_get_audio_buffer(link, AV_PERM_WRITE,
@ -206,6 +213,7 @@ static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *buf)
delta, nb_channels, buf->format);
}
ff_filter_samples(outlink, buf_out);
s->got_output = 1;
} else {
av_log(ctx, AV_LOG_WARNING, "Non-monotonous timestamps, dropping "
"whole buffer.\n");