Merge remote-tracking branch 'qatar/master'

* qatar/master:
  vorbis: Validate that the floor 1 X values contain no duplicates.
  avprobe: Identify codec probe failures rather than calling them unsupported codecs.
  avformat: Probe codecs at score 0 on buffer exhaustion conditions.
  avformat: Factorize codec probing.
  Indeo Audio decoder
  imc: make IMDCT support stereo output
  imc: move channel-specific data into separate context
  lavfi: remove request/poll and drawing functions from public API on next bump
  lavfi: make avfilter_insert_pad and pals private on next bump.
  lavfi: make formats API private on next bump.
  avplay: use buffersrc instead of custom input filter.
  avtools: move buffer management code from avconv to cmdutils.
  avconv: don't use InputStream in the buffer management code.
  avconv: fix exiting when max frames is reached.
  mpc8: fix maximum bands handling
  aacdec: Turn PS off when switching to stereo and turn it to implicit when switching to mono.

Conflicts:
	Changelog
	cmdutils.h
	ffmpeg.c
	ffplay.c
	ffprobe.c
	libavcodec/avcodec.h
	libavcodec/mpc8.c
	libavcodec/v210dec.h
	libavcodec/version.h
	libavcodec/vorbisdec.c
	libavfilter/avfilter.c
	libavfilter/avfilter.h
	libavfilter/buffersrc.c
	libavfilter/formats.c
	libavfilter/src_movie.c
	libavfilter/vf_aspect.c
	libavfilter/vf_blackframe.c
	libavfilter/vf_boxblur.c
	libavfilter/vf_crop.c
	libavfilter/vf_cropdetect.c
	libavfilter/vf_delogo.c
	libavfilter/vf_drawbox.c
	libavfilter/vf_drawtext.c
	libavfilter/vf_fade.c
	libavfilter/vf_fifo.c
	libavfilter/vf_format.c
	libavfilter/vf_frei0r.c
	libavfilter/vf_gradfun.c
	libavfilter/vf_hflip.c
	libavfilter/vf_hqdn3d.c
	libavfilter/vf_libopencv.c
	libavfilter/vf_lut.c
	libavfilter/vf_overlay.c
	libavfilter/vf_pad.c
	libavfilter/vf_scale.c
	libavfilter/vf_select.c
	libavfilter/vf_showinfo.c
	libavfilter/vf_transpose.c
	libavfilter/vf_unsharp.c
	libavfilter/vf_yadif.c
	libavfilter/vsrc_color.c
	libavfilter/vsrc_testsrc.c
	libavformat/utils.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

cmdutils.h

@@ -386,4 +386,46 @@ void exit_program(int ret);
  */
 void *grow_array(void *array, int elem_size, int *size, int new_size);
 
+typedef struct FrameBuffer {
+    uint8_t *base[4];
+    uint8_t *data[4];
+    int  linesize[4];
+
+    int h, w;
+    enum PixelFormat pix_fmt;
+
+    int refcount;
+    struct FrameBuffer **pool;  ///< head of the buffer pool
+    struct FrameBuffer *next;
+} FrameBuffer;
+
+/**
+ * Get a frame from the pool. This is intended to be used as a callback for
+ * AVCodecContext.get_buffer.
+ *
+ * @param s codec context. s->opaque must be a pointer to the head of the
+ *          buffer pool.
+ * @param frame frame->opaque will be set to point to the FrameBuffer
+ *              containing the frame data.
+ */
+int codec_get_buffer(AVCodecContext *s, AVFrame *frame);
+
+/**
+ * A callback to be used for AVCodecContext.release_buffer along with
+ * codec_get_buffer().
+ */
+void codec_release_buffer(AVCodecContext *s, AVFrame *frame);
+
+/**
+ * A callback to be used for AVFilterBuffer.free.
+ * @param fb buffer to free. fb->priv must be a pointer to the FrameBuffer
+ *           containing the buffer data.
+ */
+void filter_release_buffer(AVFilterBuffer *fb);
+
+/**
+ * Free all the buffers in the pool. This must be called after all the
+ * buffers have been released.
+ */
+void free_buffer_pool(FrameBuffer **pool);
 #endif /* CMDUTILS_H */