lavfi/buffersink: fix header.

Move non-obsolete functions, structures and constants outside
the scope of "#if FF_API_AVFILTERBUFFER".

Add attribute_deprecated to av_buffersink_get_buffer_ref()
and av_buffersink_poll_frame().

Add doxygen for av_buffersink_get_frame_flags().

libavfilter/buffersink.h

@@ -27,61 +27,6 @@
 #include "avfilter.h"
 
 #if FF_API_AVFILTERBUFFER
-/**
- * Struct to use for initializing a buffersink context.
- */
-typedef struct {
-    const enum AVPixelFormat *pixel_fmts; ///< list of allowed pixel formats, terminated by AV_PIX_FMT_NONE
-} AVBufferSinkParams;
-
-/**
- * Create an AVBufferSinkParams structure.
- *
- * Must be freed with av_free().
- */
-AVBufferSinkParams *av_buffersink_params_alloc(void);
-
-/**
- * Struct to use for initializing an abuffersink context.
- */
-typedef struct {
-    const enum AVSampleFormat *sample_fmts; ///< list of allowed sample formats, terminated by AV_SAMPLE_FMT_NONE
-    const int64_t *channel_layouts;         ///< list of allowed channel layouts, terminated by -1
-    const int *channel_counts;              ///< list of allowed channel counts, terminated by -1
-    int all_channel_counts;                 ///< if not 0, accept any channel count or layout
-    int *sample_rates;                      ///< list of allowed sample rates, terminated by -1
-} AVABufferSinkParams;
-
-/**
- * Create an AVABufferSinkParams structure.
- *
- * Must be freed with av_free().
- */
-AVABufferSinkParams *av_abuffersink_params_alloc(void);
-
-/**
- * Set the frame size for an audio buffer sink.
- *
- * All calls to av_buffersink_get_buffer_ref will return a buffer with
- * exactly the specified number of samples, or AVERROR(EAGAIN) if there is
- * not enough. The last buffer at EOF will be padded with 0.
- */
-void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size);
-
-/**
- * Tell av_buffersink_get_buffer_ref() to read video/samples buffer
- * reference, but not remove it from the buffer. This is useful if you
- * need only to read a video/samples buffer, without to fetch it.
- */
-#define AV_BUFFERSINK_FLAG_PEEK 1
-
-/**
- * Tell av_buffersink_get_buffer_ref() not to request a frame from its input.
- * If a frame is already buffered, it is read (and removed from the buffer),
- * but if no frame is present, return AVERROR(EAGAIN).
- */
-#define AV_BUFFERSINK_FLAG_NO_REQUEST 2
-
 /**
  * Get an audio/video buffer data from buffer_sink and put it in bufref.
  *
@@ -92,27 +37,16 @@ void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size);
  * @return >= 0 in case of success, a negative AVERROR code in case of
  * failure
  */
+attribute_deprecated
 int av_buffersink_get_buffer_ref(AVFilterContext *buffer_sink,
                                  AVFilterBufferRef **bufref, int flags);
 
-/* TODO */
-int av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags);
-
 /**
  * Get the number of immediately available frames.
  */
+attribute_deprecated
 int av_buffersink_poll_frame(AVFilterContext *ctx);
 
-/**
- * Get the frame rate of the input.
- */
-AVRational av_buffersink_get_frame_rate(AVFilterContext *ctx);
-
-/**
- * @defgroup libav_api Libav API
- * @{
- */
-
 /**
  * Get a buffer with filtered data from sink and put it in buf.
  *
@@ -149,6 +83,78 @@ int av_buffersink_read_samples(AVFilterContext *ctx, AVFilterBufferRef **buf,
                                int nb_samples);
 #endif
 
+/**
+ * Get a frame with filtered data from sink and put it in frame.
+ *
+ * @param ctx    pointer to a buffersink or abuffersink filter context.
+ * @param frame  pointer to an allocated frame that will be filled with data.
+ *               The data must be freed using av_frame_unref() / av_frame_free()
+ * @param flags  a combination of AV_BUFFERSINK_FLAG_* flags
+ *
+ * @return  >= 0 in for success, a negative AVERROR code for failure.
+ */
+int av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags);
+
+/**
+ * Tell av_buffersink_get_buffer_ref() to read video/samples buffer
+ * reference, but not remove it from the buffer. This is useful if you
+ * need only to read a video/samples buffer, without to fetch it.
+ */
+#define AV_BUFFERSINK_FLAG_PEEK 1
+
+/**
+ * Tell av_buffersink_get_buffer_ref() not to request a frame from its input.
+ * If a frame is already buffered, it is read (and removed from the buffer),
+ * but if no frame is present, return AVERROR(EAGAIN).
+ */
+#define AV_BUFFERSINK_FLAG_NO_REQUEST 2
+
+/**
+ * Struct to use for initializing a buffersink context.
+ */
+typedef struct {
+    const enum AVPixelFormat *pixel_fmts; ///< list of allowed pixel formats, terminated by AV_PIX_FMT_NONE
+} AVBufferSinkParams;
+
+/**
+ * Create an AVBufferSinkParams structure.
+ *
+ * Must be freed with av_free().
+ */
+AVBufferSinkParams *av_buffersink_params_alloc(void);
+
+/**
+ * Struct to use for initializing an abuffersink context.
+ */
+typedef struct {
+    const enum AVSampleFormat *sample_fmts; ///< list of allowed sample formats, terminated by AV_SAMPLE_FMT_NONE
+    const int64_t *channel_layouts;         ///< list of allowed channel layouts, terminated by -1
+    const int *channel_counts;              ///< list of allowed channel counts, terminated by -1
+    int all_channel_counts;                 ///< if not 0, accept any channel count or layout
+    int *sample_rates;                      ///< list of allowed sample rates, terminated by -1
+} AVABufferSinkParams;
+
+/**
+ * Create an AVABufferSinkParams structure.
+ *
+ * Must be freed with av_free().
+ */
+AVABufferSinkParams *av_abuffersink_params_alloc(void);
+
+/**
+ * Set the frame size for an audio buffer sink.
+ *
+ * All calls to av_buffersink_get_buffer_ref will return a buffer with
+ * exactly the specified number of samples, or AVERROR(EAGAIN) if there is
+ * not enough. The last buffer at EOF will be padded with 0.
+ */
+void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size);
+
+/**
+ * Get the frame rate of the input.
+ */
+AVRational av_buffersink_get_frame_rate(AVFilterContext *ctx);
+
 /**
  * Get a frame with filtered data from sink and put it in frame.
  *
@@ -177,8 +183,4 @@ int av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame);
  */
 int av_buffersink_get_samples(AVFilterContext *ctx, AVFrame *frame, int nb_samples);
 
-/**
- * @}
- */
-
 #endif /* AVFILTER_BUFFERSINK_H */