From cd99146253cf9de5dad5694b97027d5612fdc61d Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Mon, 2 Jul 2012 20:13:40 +0200
Subject: lavfi: add error handling to filter_samples().

---
 libavfilter/af_asyncts.c | 38 ++++++++++++++++++++++----------------
 1 file changed, 22 insertions(+), 16 deletions(-)

(limited to 'libavfilter/af_asyncts.c')

diff --git a/libavfilter/af_asyncts.c b/libavfilter/af_asyncts.c
index 097bc6045f..4052fbdce7 100644
--- a/libavfilter/af_asyncts.c
+++ b/libavfilter/af_asyncts.c
@@ -136,18 +136,18 @@ static int request_frame(AVFilterLink *link)
         avresample_convert(s->avr, (void**)buf->extended_data, buf->linesize[0],
                            nb_samples, NULL, 0, 0);
         buf->pts = s->pts;
-        ff_filter_samples(link, buf);
-        return 0;
+        return ff_filter_samples(link, buf);
     }
 
     return ret;
 }
 
-static void write_to_fifo(ASyncContext *s, AVFilterBufferRef *buf)
+static int write_to_fifo(ASyncContext *s, AVFilterBufferRef *buf)
 {
-    avresample_convert(s->avr, NULL, 0, 0, (void**)buf->extended_data,
-                       buf->linesize[0], buf->audio->nb_samples);
+    int ret = avresample_convert(s->avr, NULL, 0, 0, (void**)buf->extended_data,
+                                 buf->linesize[0], buf->audio->nb_samples);
     avfilter_unref_buffer(buf);
+    return ret;
 }
 
 /* get amount of data currently buffered, in samples */
@@ -156,7 +156,7 @@ static int64_t get_delay(ASyncContext *s)
     return avresample_available(s->avr) + avresample_get_delay(s->avr);
 }
 
-static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *buf)
+static int filter_samples(AVFilterLink *inlink, AVFilterBufferRef *buf)
 {
     AVFilterContext  *ctx = inlink->dst;
     ASyncContext       *s = ctx->priv;
@@ -164,7 +164,7 @@ static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *buf)
     int nb_channels = av_get_channel_layout_nb_channels(buf->audio->channel_layout);
     int64_t pts = (buf->pts == AV_NOPTS_VALUE) ? buf->pts :
                   av_rescale_q(buf->pts, inlink->time_base, outlink->time_base);
-    int out_size;
+    int out_size, ret;
     int64_t delta;
 
     /* buffer data until we get the first timestamp */
@@ -172,14 +172,12 @@ static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *buf)
         if (pts != AV_NOPTS_VALUE) {
             s->pts = pts - get_delay(s);
         }
-        write_to_fifo(s, buf);
-        return;
+        return write_to_fifo(s, buf);
     }
 
     /* now wait for the next timestamp */
     if (pts == AV_NOPTS_VALUE) {
-        write_to_fifo(s, buf);
-        return;
+        return write_to_fifo(s, buf);
     }
 
     /* when we have two timestamps, compute how many samples would we have
@@ -202,8 +200,10 @@ static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *buf)
     if (out_size > 0) {
         AVFilterBufferRef *buf_out = ff_get_audio_buffer(outlink, AV_PERM_WRITE,
                                                          out_size);
-        if (!buf_out)
-            return;
+        if (!buf_out) {
+            ret = AVERROR(ENOMEM);
+            goto fail;
+        }
 
         avresample_read(s->avr, (void**)buf_out->extended_data, out_size);
         buf_out->pts = s->pts;
@@ -212,7 +212,9 @@ static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *buf)
             av_samples_set_silence(buf_out->extended_data, out_size - delta,
                                    delta, nb_channels, buf->format);
         }
-        ff_filter_samples(outlink, buf_out);
+        ret = ff_filter_samples(outlink, buf_out);
+        if (ret < 0)
+            goto fail;
         s->got_output = 1;
     } else {
         av_log(ctx, AV_LOG_WARNING, "Non-monotonous timestamps, dropping "
@@ -223,9 +225,13 @@ static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *buf)
     avresample_read(s->avr, NULL, avresample_available(s->avr));
 
     s->pts = pts - avresample_get_delay(s->avr);
-    avresample_convert(s->avr, NULL, 0, 0, (void**)buf->extended_data,
-                       buf->linesize[0], buf->audio->nb_samples);
+    ret = avresample_convert(s->avr, NULL, 0, 0, (void**)buf->extended_data,
+                             buf->linesize[0], buf->audio->nb_samples);
+
+fail:
     avfilter_unref_buffer(buf);
+
+    return ret;
 }
 
 AVFilter avfilter_af_asyncts = {
-- 
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