[SCM] libav/experimental: Implement av_image_alloc() and use it in avfilter_default_get_video_buffer().

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 4da12e3b13d362e0218956a78dd2b8f7a1260265
Author: Stefano Sabatini <stefano.sabatini-lala at poste.it>
Date:   Sat Dec 4 12:56:16 2010 +0000

    Implement av_image_alloc() and use it in
    avfilter_default_get_video_buffer().
    
    Originally committed as revision 25878 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/doc/APIchanges b/doc/APIchanges
index ebd5faa..63457aa 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -12,6 +12,9 @@ libavutil:   2009-03-08
 
 
 API changes, most recent first:
+2010-12-04 - r25878 - lavcore 1.15.0 - av_image_alloc()
+  Add av_image_alloc() to libavcore/imgutils.h.
+
 2010-12-02 - r25862 - lavfi 1.67.0 - avfilter_graph_create_filter()
   Add function avfilter_graph_create_filter() in avfiltergraph.h.
 
diff --git a/libavcore/avcore.h b/libavcore/avcore.h
index 3d66136..b19efe8 100644
--- a/libavcore/avcore.h
+++ b/libavcore/avcore.h
@@ -27,7 +27,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVCORE_VERSION_MAJOR  0
-#define LIBAVCORE_VERSION_MINOR 14
+#define LIBAVCORE_VERSION_MINOR 15
 #define LIBAVCORE_VERSION_MICRO  0
 
 #define LIBAVCORE_VERSION_INT   AV_VERSION_INT(LIBAVCORE_VERSION_MAJOR, \
diff --git a/libavcore/imgutils.c b/libavcore/imgutils.c
index cf79093..0f449ff 100644
--- a/libavcore/imgutils.c
+++ b/libavcore/imgutils.c
@@ -172,6 +172,35 @@ int ff_set_systematic_pal2(uint32_t pal[256], enum PixelFormat pix_fmt)
     return 0;
 }
 
+int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
+                   int w, int h, enum PixelFormat pix_fmt, int align)
+{
+    int i, ret;
+    uint8_t *buf;
+
+    if ((ret = av_image_check_size(w, h, 0, NULL)) < 0)
+        return ret;
+    if ((ret = av_image_fill_linesizes(linesizes, pix_fmt, w)) < 0)
+        return ret;
+
+    for (i = 0; i < 4; i++)
+        linesizes[i] = FFALIGN(linesizes[i], align);
+
+    if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, NULL, linesizes)) < 0)
+        return ret;
+    buf = av_malloc(ret + align);
+    if (!buf)
+        return AVERROR(ENOMEM);
+    if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, buf, linesizes)) < 0) {
+        av_free(buf);
+        return ret;
+    }
+    if (av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_PAL)
+        ff_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt);
+
+    return ret;
+}
+
 typedef struct ImgUtils {
     const AVClass *class;
     int   log_offset;
diff --git a/libavcore/imgutils.h b/libavcore/imgutils.h
index 8458fc6..6c39d53 100644
--- a/libavcore/imgutils.h
+++ b/libavcore/imgutils.h
@@ -78,6 +78,19 @@ int av_image_fill_pointers(uint8_t *data[4], enum PixelFormat pix_fmt, int heigh
                            uint8_t *ptr, const int linesizes[4]);
 
 /**
+ * Allocate an image with size w and h and pixel format pix_fmt, and
+ * fill pointers and linesizes accordingly.
+ * The allocated image buffer has to be freed by using
+ * av_freep(&pointers[0]).
+ *
+ * @param align the value to use for buffer size alignment
+ * @return the size in bytes required for the image buffer, a negative
+ * error code in case of failure
+ */
+int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
+                   int w, int h, enum PixelFormat pix_fmt, int align);
+
+/**
  * Copy image plane from src to dst.
  * That is, copy "height" number of lines of "bytewidth" bytes each.
  * The first byte of each successive line is separated by *_linesize
diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index 4dea653..aa83a52 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -26,7 +26,7 @@
 
 #define LIBAVFILTER_VERSION_MAJOR  1
 #define LIBAVFILTER_VERSION_MINOR 67
-#define LIBAVFILTER_VERSION_MICRO  0
+#define LIBAVFILTER_VERSION_MICRO  1
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
                                                LIBAVFILTER_VERSION_MINOR, \
diff --git a/libavfilter/defaults.c b/libavfilter/defaults.c
index 4a48a3a..aa3739c 100644
--- a/libavfilter/defaults.c
+++ b/libavfilter/defaults.c
@@ -37,26 +37,18 @@ void ff_avfilter_default_free_buffer(AVFilterBuffer *ptr)
  * alloc & free cycle currently implemented. */
 AVFilterBufferRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
 {
-    char *buf = NULL;
-    int linesize[4], i, tempsize;
+    int linesize[4];
     uint8_t *data[4];
     AVFilterBufferRef *picref = NULL;
 
-    av_image_fill_linesizes(linesize, link->format, w);
-    for (i = 0; i < 4; i++)
-        linesize[i] = FFALIGN(linesize[i], 16);
-    tempsize = av_image_fill_pointers(data, link->format, h, NULL, linesize);
-    buf = av_malloc(tempsize + 16); // +2 is needed for swscaler, +16 to be
-                                    // SIMD-friendly
-    if (!buf)
+    // +2 is needed for swscaler, +16 to be SIMD-friendly
+    if (av_image_alloc(data, linesize, w, h, link->format, 16) < 0)
         return NULL;
 
-    av_image_fill_pointers(data, link->format, h, buf, linesize);
-
     picref = avfilter_get_video_buffer_ref_from_arrays(data, linesize,
                                                        perms, w, h, link->format);
     if (!picref) {
-        av_free(buf);
+        av_free(data[0]);
         return NULL;
     }
 

-- 
Libav/FFmpeg packaging