1 files changed, 49 insertions, 1 deletions

diff --git a/libavfilter/vf_settb.c b/libavfilter/vf_settb.c
index b6e951ba1f..3c5ac6a71b 100644
--- a/libavfilter/vf_settb.c
+++ b/libavfilter/vf_settb.c
@@ -29,17 +29,20 @@
 #include "libavutil/rational.h"
 #include "avfilter.h"
 #include "internal.h"
+#include "audio.h"
 #include "video.h"
 
 static const char *const var_names[] = {
     "AVTB",   /* default timebase 1/AV_TIME_BASE */
     "intb",   /* input timebase */
+    "sr",     /* sample rate */
     NULL
 };
 
 enum var_name {
     VAR_AVTB,
     VAR_INTB,
+    VAR_SR,
     VAR_VARS_NB
 };
 
@@ -70,6 +73,7 @@ static int config_output_props(AVFilterLink *outlink)
 
     settb->var_values[VAR_AVTB] = av_q2d(AV_TIME_BASE_Q);
     settb->var_values[VAR_INTB] = av_q2d(inlink->time_base);
+    settb->var_values[VAR_SR]   = inlink->sample_rate;
 
     outlink->w = inlink->w;
     outlink->h = inlink->h;
@@ -113,9 +117,28 @@ static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
     ff_start_frame(outlink, picref2);
 }
 
+static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *insamples)
+{
+    AVFilterContext *ctx = inlink->dst;
+    AVFilterLink *outlink = ctx->outputs[0];
+    AVFilterBufferRef *outsamples = insamples;
+
+    if (av_cmp_q(inlink->time_base, outlink->time_base)) {
+        outsamples = avfilter_ref_buffer(insamples, ~0);
+        outsamples->pts = av_rescale_q(insamples->pts, inlink->time_base, outlink->time_base);
+        av_log(ctx, AV_LOG_DEBUG, "tb:%d/%d pts:%"PRId64" -> tb:%d/%d pts:%"PRId64"\n",
+               inlink ->time_base.num, inlink ->time_base.den, insamples ->pts,
+               outlink->time_base.num, outlink->time_base.den, outsamples->pts);
+        avfilter_unref_buffer(insamples);
+    }
+
+    ff_filter_samples(outlink, outsamples);
+}
+
+#if CONFIG_SETTB_FILTER
 AVFilter avfilter_vf_settb = {
     .name      = "settb",
-    .description = NULL_IF_CONFIG_SMALL("Set timebase for the output link."),
+    .description = NULL_IF_CONFIG_SMALL("Set timebase for the video output link."),
     .init      = init,
 
     .priv_size = sizeof(SetTBContext),
@@ -132,3 +155,28 @@ AVFilter avfilter_vf_settb = {
                                     .config_props    = config_output_props, },
                                   { .name = NULL}},
 };
+#endif
+
+#if CONFIG_ASETTB_FILTER
+AVFilter avfilter_af_asettb = {
+    .name      = "asettb",
+    .description = NULL_IF_CONFIG_SMALL("Set timebase for the audio output link."),
+    .init      = init,
+
+    .priv_size = sizeof(SetTBContext),
+
+    .inputs    = (const AVFilterPad[]) {
+        { .name             = "default",
+          .type             = AVMEDIA_TYPE_AUDIO,
+          .get_audio_buffer = ff_null_get_audio_buffer,
+          .filter_samples   = filter_samples, },
+        { .name = NULL }
+    },
+    .outputs   = (const AVFilterPad[]) {
+        { .name            = "default",
+          .type            = AVMEDIA_TYPE_AUDIO,
+          .config_props    = config_output_props, },
+        { .name = NULL}
+    },
+};
+#endif