Add av_picture_data_copy() and reimplement av_picture_copy() as a

wrapper of it.

The new function is more generic, and does not depend on the
definition of the AVPicture struct.

Patch by S.N. Hemanth Meenakshisundaram s + "meenakshisundaram".substr(0, 7) + "@ucsd.edu".

Originally committed as revision 24768 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/avcodec.h

@@ -30,8 +30,8 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 52
-#define LIBAVCODEC_VERSION_MINOR 84
-#define LIBAVCODEC_VERSION_MICRO  3
+#define LIBAVCODEC_VERSION_MINOR 85
+#define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \
@@ -3937,7 +3937,17 @@ void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
 void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size);
 
 /**
- * Copy image 'src' to 'dst'.
+ * Copy image data in src_data to dst_data.
+ *
+ * @param dst_linesize linesizes for the image in dst_data
+ * @param src_linesize linesizes for the image in src_data
+ */
+void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
+                          uint8_t *src_data[4], int src_linesize[4],
+                          enum PixelFormat pix_fmt, int width, int height);
+
+/**
+ * Copy image src to dst. Wraps av_picture_data_copy() above.
  */
 void av_picture_copy(AVPicture *dst, const AVPicture *src,
                      enum PixelFormat pix_fmt, int width, int height);

libavcodec/imgconvert.c

@@ -845,8 +845,9 @@ int ff_get_plane_bytewidth(enum PixelFormat pix_fmt, int width, int plane)
     return -1;
 }
 
-void av_picture_copy(AVPicture *dst, const AVPicture *src,
-                     enum PixelFormat pix_fmt, int width, int height)
+void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
+                          uint8_t *src_data[4], int src_linesize[4],
+                          enum PixelFormat pix_fmt, int width, int height)
 {
     int i;
     const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
@@ -862,21 +863,28 @@ void av_picture_copy(AVPicture *dst, const AVPicture *src,
             if (i == 1 || i == 2) {
                 h= -((-height)>>desc->log2_chroma_h);
             }
-            ff_img_copy_plane(dst->data[i], dst->linesize[i],
-                           src->data[i], src->linesize[i],
-                           bwidth, h);
+            ff_img_copy_plane(dst_data[i], dst_linesize[i],
+                              src_data[i], src_linesize[i],
+                              bwidth, h);
         }
         break;
     case FF_PIXEL_PALETTE:
-        ff_img_copy_plane(dst->data[0], dst->linesize[0],
-                       src->data[0], src->linesize[0],
-                       width, height);
+        ff_img_copy_plane(dst_data[0], dst_linesize[0],
+                          src_data[0], src_linesize[0],
+                          width, height);
         /* copy the palette */
-        memcpy(dst->data[1], src->data[1], 4*256);
+        memcpy(dst_data[1], src_data[1], 4*256);
         break;
     }
 }
 
+void av_picture_copy(AVPicture *dst, const AVPicture *src,
+                     enum PixelFormat pix_fmt, int width, int height)
+{
+    av_picture_data_copy(dst->data, dst->linesize, src->data,
+                         src->linesize, pix_fmt, width, height);
+}
+
 /* 2x2 -> 1x1 */
 void ff_shrink22(uint8_t *dst, int dst_wrap,
                      const uint8_t *src, int src_wrap,