lavfi: add extended_data to AVFilterBuffer.

This is similar to what has previously been done in AVFrame to allow
dealing with more than 8 channels.

1 files changed, 32 insertions, 0 deletions

diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index ef61a5da6a..8965094b19 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -76,6 +76,22 @@ typedef struct AVFilterBuffer {
 
     int format;                 ///< media format
     int w, h;                   ///< width and height of the allocated buffer
+
+    /**
+     * pointers to the data planes/channels.
+     *
+     * For video, this should simply point to data[].
+     *
+     * For planar audio, each channel has a separate data pointer, and
+     * linesize[0] contains the size of each channel buffer.
+     * For packed audio, there is just one data pointer, and linesize[0]
+     * contains the total size of the buffer for all channels.
+     *
+     * Note: Both data and extended_data will always be set, but for planar
+     * audio with more channels that can fit in data, extended_data must be used
+     * in order to access all channels.
+     */
+    uint8_t **extended_data;
 } AVFilterBuffer;
 
 #define AV_PERM_READ     0x01   ///< can read from the buffer
@@ -140,6 +156,22 @@ typedef struct AVFilterBufferRef {
     enum AVMediaType type;      ///< media type of buffer data
     AVFilterBufferRefVideoProps *video; ///< video buffer specific properties
     AVFilterBufferRefAudioProps *audio; ///< audio buffer specific properties
+
+    /**
+     * pointers to the data planes/channels.
+     *
+     * For video, this should simply point to data[].
+     *
+     * For planar audio, each channel has a separate data pointer, and
+     * linesize[0] contains the size of each channel buffer.
+     * For packed audio, there is just one data pointer, and linesize[0]
+     * contains the total size of the buffer for all channels.
+     *
+     * Note: Both data and extended_data will always be set, but for planar
+     * audio with more channels that can fit in data, extended_data must be used
+     * in order to access all channels.
+     */
+    uint8_t **extended_data;
 } AVFilterBufferRef;
 
 /**