[SCM] libav/experimental: Reimplement av_fill_image_pointers() using the information stored in the pixdescs.

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 7d8d18de2c9fc4bdfd2680782d74071140f08630
Author: Stefano Sabatini <stefano.sabatini-lala at poste.it>
Date:   Fri Jul 30 08:42:19 2010 +0000

    Reimplement av_fill_image_pointers() using the information stored in
    the pixdescs.
    
    The new implementation is more compact, and does not need to be
    updated at each pixel format addition.
    
    Originally committed as revision 24590 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcore/imgutils.c b/libavcore/imgutils.c
index fb0b537..3f7cbc1 100644
--- a/libavcore/imgutils.c
+++ b/libavcore/imgutils.c
@@ -60,105 +60,38 @@ int av_fill_image_linesizes(int linesize[4], enum PixelFormat pix_fmt, int width
 }
 
 int av_fill_image_pointers(uint8_t *data[4], enum PixelFormat pix_fmt, int height,
-                           uint8_t *ptr, const int linesize[4])
+                           uint8_t *ptr, const int linesizes[4])
 {
-    int size, h2, size2;
+    int i, total_size, size[4], has_plane[4];
+
     const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
+    memset(data     , 0, sizeof(data[0])*4);
+    memset(size     , 0, sizeof(size));
+    memset(has_plane, 0, sizeof(has_plane));
+
+    if (desc->flags & PIX_FMT_HWACCEL)
+        return AVERROR(EINVAL);
+
+    data[0] = ptr;
+    size[0] = linesizes[0] * height;
 
-    size = linesize[0] * height;
-    switch(pix_fmt) {
-    case PIX_FMT_YUV420P:
-    case PIX_FMT_YUV422P:
-    case PIX_FMT_YUV444P:
-    case PIX_FMT_YUV410P:
-    case PIX_FMT_YUV411P:
-    case PIX_FMT_YUV440P:
-    case PIX_FMT_YUVJ420P:
-    case PIX_FMT_YUVJ422P:
-    case PIX_FMT_YUVJ444P:
-    case PIX_FMT_YUVJ440P:
-    case PIX_FMT_YUV420P16LE:
-    case PIX_FMT_YUV422P16LE:
-    case PIX_FMT_YUV444P16LE:
-    case PIX_FMT_YUV420P16BE:
-    case PIX_FMT_YUV422P16BE:
-    case PIX_FMT_YUV444P16BE:
-        h2 = (height + (1 << desc->log2_chroma_h) - 1) >> desc->log2_chroma_h;
-        size2 = linesize[1] * h2;
-        data[0] = ptr;
-        data[1] = data[0] + size;
-        data[2] = data[1] + size2;
-        data[3] = NULL;
-        return size + 2 * size2;
-    case PIX_FMT_YUVA420P:
-        h2 = (height + (1 << desc->log2_chroma_h) - 1) >> desc->log2_chroma_h;
-        size2 = linesize[1] * h2;
-        data[0] = ptr;
-        data[1] = data[0] + size;
-        data[2] = data[1] + size2;
-        data[3] = data[1] + size2 + size2;
-        return 2 * size + 2 * size2;
-    case PIX_FMT_NV12:
-    case PIX_FMT_NV21:
-        h2 = (height + (1 << desc->log2_chroma_h) - 1) >> desc->log2_chroma_h;
-        size2 = linesize[1] * h2;
-        data[0] = ptr;
-        data[1] = data[0] + size;
-        data[2] = NULL;
-        data[3] = NULL;
-        return size + size2;
-    case PIX_FMT_RGB24:
-    case PIX_FMT_BGR24:
-    case PIX_FMT_ARGB:
-    case PIX_FMT_ABGR:
-    case PIX_FMT_RGBA:
-    case PIX_FMT_BGRA:
-    case PIX_FMT_RGB48BE:
-    case PIX_FMT_RGB48LE:
-    case PIX_FMT_GRAY16BE:
-    case PIX_FMT_GRAY16LE:
-    case PIX_FMT_BGR444BE:
-    case PIX_FMT_BGR444LE:
-    case PIX_FMT_BGR555BE:
-    case PIX_FMT_BGR555LE:
-    case PIX_FMT_BGR565BE:
-    case PIX_FMT_BGR565LE:
-    case PIX_FMT_RGB444BE:
-    case PIX_FMT_RGB444LE:
-    case PIX_FMT_RGB555BE:
-    case PIX_FMT_RGB555LE:
-    case PIX_FMT_RGB565BE:
-    case PIX_FMT_RGB565LE:
-    case PIX_FMT_YUYV422:
-    case PIX_FMT_UYVY422:
-    case PIX_FMT_UYYVYY411:
-    case PIX_FMT_RGB4:
-    case PIX_FMT_BGR4:
-    case PIX_FMT_MONOWHITE:
-    case PIX_FMT_MONOBLACK:
-    case PIX_FMT_Y400A:
-        data[0] = ptr;
-        data[1] = NULL;
-        data[2] = NULL;
-        data[3] = NULL;
-        return size;
-    case PIX_FMT_PAL8:
-    case PIX_FMT_RGB8:
-    case PIX_FMT_BGR8:
-    case PIX_FMT_RGB4_BYTE:
-    case PIX_FMT_BGR4_BYTE:
-    case PIX_FMT_GRAY8:
-        size2 = (size + 3) & ~3;
-        data[0] = ptr;
-        data[1] = ptr + size2; /* palette is stored here as 256 32 bit words */
-        data[2] = NULL;
-        data[3] = NULL;
-        return size2 + 256 * 4;
-    default:
-        data[0] = NULL;
-        data[1] = NULL;
-        data[2] = NULL;
-        data[3] = NULL;
-        return -1;
+    if (desc->flags & PIX_FMT_PAL) {
+        size[0] = (size[0] + 3) & ~3;
+        data[1] = ptr + size[0]; /* palette is stored here as 256 32 bits words */
+        return size[0] + 256 * 4;
     }
+
+    for (i = 0; i < 4; i++)
+        has_plane[desc->comp[i].plane] = 1;
+
+    total_size = size[0];
+    for (i = 1; has_plane[i] && i < 4; i++) {
+        int h, s = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
+        data[i] = data[i-1] + size[i-1];
+        h = (height + (1 << s) - 1) >> s;
+        size[i] = h * linesizes[i];
+        total_size += size[i];
+    }
+
+    return total_size;
 }

-- 
Libav/FFmpeg packaging