1 files changed, 90 insertions, 5 deletions
diff --git a/libavfilter/buffersink.h b/libavfilter/buffersink.h
index e358ac3..acafa76 100644
--- a/libavfilter/buffersink.h
+++ b/libavfilter/buffersink.h
@@ -1,18 +1,18 @@
 /*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
@@ -21,12 +21,93 @@
 
 /**
  * @file
- * memory buffer sink API
+ * memory buffer sink API for audio and video
  */
 
 #include "avfilter.h"
 
 /**
+ * Struct to use for initializing a buffersink context.
+ */
+typedef struct {
+    const enum PixelFormat *pixel_fmts; ///< list of allowed pixel formats, terminated by 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
+} 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.
+ *
+ * This function works with both audio and video buffer sinks.
+ *
+ * @param buffer_sink pointer to a buffersink or abuffersink context
+ * @param flags a combination of AV_BUFFERSINK_FLAG_* flags
+ * @return >= 0 in case of success, a negative AVERROR code in case of
+ * failure
+ */
+int av_buffersink_get_buffer_ref(AVFilterContext *buffer_sink,
+                                 AVFilterBufferRef **bufref, int flags);
+
+
+/**
+ * Get the number of immediately available frames.
+ */
+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.
  *
  * @param ctx pointer to a context of a buffersink or abuffersink AVFilter.
@@ -59,4 +140,8 @@ int av_buffersink_read(AVFilterContext *ctx, AVFilterBufferRef **buf);
 int av_buffersink_read_samples(AVFilterContext *ctx, AVFilterBufferRef **buf,
                                int nb_samples);
 
+/**
+ * @}
+ */
+
 #endif /* AVFILTER_BUFFERSINK_H */