[FFmpeg-devel] [PATCH 1/2] swresample/swresample: add av_warn_unused_result

[Ganesh Ajjanagadde]

This will trigger a few warnings (e.g in avfilter) that need to be
fixed.

Signed-off-by: Ganesh Ajjanagadde <gajjanagadde at gmail.com>
---
 libswresample/swresample.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libswresample/swresample.h b/libswresample/swresample.h
index 10eaebc..d21084f 100644
--- a/libswresample/swresample.h
+++ b/libswresample/swresample.h
@@ -220,6 +220,7 @@ struct SwrContext *swr_alloc(void);
  * @param[in,out]   s Swr context to initialize
  * @return AVERROR error code in case of failure.
  */
+av_warn_unused_result
 int swr_init(struct SwrContext *s);
 
 /**
@@ -307,6 +308,7 @@ void swr_close(struct SwrContext *s);
  *
  * @return number of samples output per channel, negative value on error
  */
+av_warn_unused_result
 int swr_convert(struct SwrContext *s, uint8_t **out, int out_count,
                                 const uint8_t **in , int in_count);
 
@@ -354,6 +356,7 @@ int64_t swr_next_pts(struct SwrContext *s, int64_t pts);
  *            @li compensation unsupported by resampler, or
  *            @li swr_init() fails when called.
  */
+av_warn_unused_result
 int swr_set_compensation(struct SwrContext *s, int sample_delta, int compensation_distance);
 
 /**
@@ -364,6 +367,7 @@ int swr_set_compensation(struct SwrContext *s, int sample_delta, int compensatio
  *                            indexes, -1 for a muted channel)
  * @return >= 0 on success, or AVERROR error code in case of failure.
  */
+av_warn_unused_result
 int swr_set_channel_mapping(struct SwrContext *s, const int *channel_map);
 
 /**
@@ -375,6 +379,7 @@ int swr_set_channel_mapping(struct SwrContext *s, const int *channel_map);
  * @param stride  offset between lines of the matrix
  * @return  >= 0 on success, or AVERROR error code in case of failure.
  */
+av_warn_unused_result
 int swr_set_matrix(struct SwrContext *s, const double *matrix, int stride);
 
 /**
@@ -395,6 +400,7 @@ int swr_set_matrix(struct SwrContext *s, const double *matrix, int stride);
  *
  * @return >= 0 on success, or a negative AVERROR code on failure
  */
+av_warn_unused_result
 int swr_drop_output(struct SwrContext *s, int count);
 
 /**
@@ -408,6 +414,7 @@ int swr_drop_output(struct SwrContext *s, int count);
  *
  * @return >= 0 on success, or a negative AVERROR code on failure
  */
+av_warn_unused_result
 int swr_inject_silence(struct SwrContext *s, int count);
 
 /**
@@ -526,6 +533,7 @@ const char *swresample_license(void);
  * @return                0 on success, AVERROR on failure or nonmatching
  *                        configuration.
  */
+av_warn_unused_result
 int swr_convert_frame(SwrContext *swr,
                       AVFrame *output, const AVFrame *input);
 
@@ -543,6 +551,7 @@ int swr_convert_frame(SwrContext *swr,
  * @param input           input AVFrame
  * @return                0 on success, AVERROR on failure.
  */
+av_warn_unused_result
 int swr_config_frame(SwrContext *swr, const AVFrame *out, const AVFrame *in);
 
 /**
-- 
2.6.1