[FFmpeg-devel] [PATCH] lavfi/aevalsrc: try to honor specified duration

[Matthieu Bouron]

If nb_samples divide sample_rate and if nb_samples allow it, aevalsrc
should generate the exact amount of samples according to duration.

Example:
aevalsrc=0::n=480:s=48000:d=5.21 should generate 250080 samples.
---
 libavfilter/asrc_aevalsrc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavfilter/asrc_aevalsrc.c b/libavfilter/asrc_aevalsrc.c
index 3315f1f..106b59a 100644
--- a/libavfilter/asrc_aevalsrc.c
+++ b/libavfilter/asrc_aevalsrc.c
@@ -214,9 +214,9 @@ static int request_frame(AVFilterLink *outlink)
     EvalContext *eval = outlink->src->priv;
     AVFilterBufferRef *samplesref;
     int i, j;
-    double t = eval->var_values[VAR_N] * (double)1/eval->sample_rate;
+    double t = (eval->var_values[VAR_N] + 1) * (double)1/eval->sample_rate;
 
-    if (eval->duration >= 0 && t > eval->duration)
+    if (eval->duration >= 0 && t >= eval->duration)
         return AVERROR_EOF;
 
     samplesref = ff_get_audio_buffer(outlink, AV_PERM_WRITE, eval->nb_samples);
-- 
1.8.1