avfilter/all: propagate errors of functions from avfilter/formats

Many of the functions from avfilter/formats can return errors, usually AVERROR(ENOMEM).
This propagates the return values.

All of these were found by using av_warn_unused_result, demonstrating its utility.

Tested with FATE. I am least sure of the changes to avfilter/filtergraph,
since I don't know what/how reduce_format is intended to behave and how it should
react to errors.

Fixes: CID 1325680, 1325679, 1325678.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Previous version Reviewed-by: Nicolas George <george@nsup.org>
Previous version Reviewed-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

1 files changed, 8 insertions, 6 deletions

diff --git a/libavfilter/asrc_flite.c b/libavfilter/asrc_flite.c
index a99f2dc923..b3f83abd74 100644
--- a/libavfilter/asrc_flite.c
+++ b/libavfilter/asrc_flite.c
@@ -205,18 +205,20 @@ static av_cold void uninit(AVFilterContext *ctx)
 static int query_formats(AVFilterContext *ctx)
 {
     FliteContext *flite = ctx->priv;
+    int ret;
 
     AVFilterChannelLayouts *chlayouts = NULL;
     int64_t chlayout = av_get_default_channel_layout(flite->wave->num_channels);
     AVFilterFormats *sample_formats = NULL;
     AVFilterFormats *sample_rates = NULL;
 
-    ff_add_channel_layout(&chlayouts, chlayout);
-    ff_set_common_channel_layouts(ctx, chlayouts);
-    ff_add_format(&sample_formats, AV_SAMPLE_FMT_S16);
-    ff_set_common_formats(ctx, sample_formats);
-    ff_add_format(&sample_rates, flite->wave->sample_rate);
-    ff_set_common_samplerates (ctx, sample_rates);
+    if ((ret = ff_add_channel_layout         (&chlayouts     , chlayout                )) < 0 ||
+        (ret = ff_set_common_channel_layouts (ctx            , chlayouts               )) < 0 ||
+        (ret = ff_add_format                 (&sample_formats, AV_SAMPLE_FMT_S16       )) < 0 ||
+        (ret = ff_set_common_formats         (ctx            , sample_formats          )) < 0 ||
+        (ret = ff_add_format                 (&sample_rates  , flite->wave->sample_rate)) < 0 ||
+        (ret = ff_set_common_samplerates     (ctx            , sample_rates            )) < 0)
+        return ret;
 
     return 0;
 }