recommit of

promote avpicture_alloc to public interface patch by (Drew Hess <dhess at ilm dot com>)

Originally committed as revision 2351 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/avcodec.h

@@ -1524,6 +1524,20 @@ void img_resample(ImgReSampleContext *s,
 
 void img_resample_close(ImgReSampleContext *s);
 
+/**
+ * Allocate memory for a picture.  Call avpicture_free to free it.
+ *
+ * @param picture the picture to be filled in.
+ * @param pix_fmt the format of the picture.
+ * @param width the width of the picture.
+ * @param height the height of the picture.
+ * @return 0 if successful, -1 if not.
+ */
+int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
+
+/* Free a picture previously allocated by avpicture_alloc. */
+void avpicture_free(AVPicture *picture);
+
 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
                    int pix_fmt, int width, int height);
 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,

libavcodec/imgconvert.c

@@ -1613,7 +1613,7 @@ static ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {
     },
 };
 
-static int avpicture_alloc(AVPicture *picture,
+int avpicture_alloc(AVPicture *picture,
                            int pix_fmt, int width, int height)
 {
     unsigned int size;
@@ -1630,7 +1630,7 @@ static int avpicture_alloc(AVPicture *picture,
     return -1;
 }
 
-static void avpicture_free(AVPicture *picture)
+void avpicture_free(AVPicture *picture)
 {
     av_free(picture->data[0]);
 }