ffmpeg source update for sep 09

source/patched-ffmpeg-mt/libavcore/imgutils.c

 /*
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**
  * @file
  * misc image utilities
  */
 
 #include "imgutils.h"
 #include "libavutil/pixdesc.h"
 
-int av_fill_image_linesizes(int linesizes[4], enum PixelFormat pix_fmt, int width)
+void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
+                                const AVPixFmtDescriptor *pixdesc)
+{
+    int i;
+    memset(max_pixsteps, 0, 4*sizeof(max_pixsteps[0]));
+    if (max_pixstep_comps)
+        memset(max_pixstep_comps, 0, 4*sizeof(max_pixstep_comps[0]));
+
+    for (i = 0; i < 4; i++) {
+        const AVComponentDescriptor *comp = &(pixdesc->comp[i]);
+        if ((comp->step_minus1+1) > max_pixsteps[comp->plane]) {
+            max_pixsteps[comp->plane] = comp->step_minus1+1;
+            if (max_pixstep_comps)
+                max_pixstep_comps[comp->plane] = i;
+        }
+    }
+}
+
+int av_image_get_linesize(enum PixelFormat pix_fmt, int width, int plane)
+{
+    const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
+    int max_step     [4];       /* max pixel step for each plane */
+    int max_step_comp[4];       /* the component for each plane which has the max pixel step */
+    int s;
+
+    if (desc->flags & PIX_FMT_BITSTREAM)
+        return (width * (desc->comp[0].step_minus1+1) + 7) >> 3;
+
+    av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
+    s = (max_step_comp[plane] == 1 || max_step_comp[plane] == 2) ? desc->log2_chroma_w : 0;
+    return max_step[plane] * (((width + (1 << s) - 1)) >> s);
+}
+
+int av_image_fill_linesizes(int linesizes[4], enum PixelFormat pix_fmt, int width)
 {
     int i;
     const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
     int max_step     [4];       /* max pixel step for each plane */
     int max_step_comp[4];       /* the component for each plane which has the max pixel step */
 
     memset(linesizes, 0, 4*sizeof(linesizes[0]));
 
-    if (desc->flags & PIX_FMT_HWACCEL)
+    if ((unsigned)pix_fmt >= PIX_FMT_NB || desc->flags & PIX_FMT_HWACCEL)
         return AVERROR(EINVAL);
 
     if (desc->flags & PIX_FMT_BITSTREAM) {
         linesizes[0] = (width * (desc->comp[0].step_minus1+1) + 7) >> 3;
         return 0;
     }
 
-    memset(max_step     , 0, sizeof(max_step     ));
-    memset(max_step_comp, 0, sizeof(max_step_comp));
-    for (i = 0; i < 4; i++) {
-        const AVComponentDescriptor *comp = &(desc->comp[i]);
-        if ((comp->step_minus1+1) > max_step[comp->plane]) {
-            max_step     [comp->plane] = comp->step_minus1+1;
-            max_step_comp[comp->plane] = i;
-        }
-    }
-
+    av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
     for (i = 0; i < 4; i++) {
         int s = (max_step_comp[i] == 1 || max_step_comp[i] == 2) ? desc->log2_chroma_w : 0;
         linesizes[i] = max_step[i] * (((width + (1 << s) - 1)) >> s);
     }
 
     return 0;
 }
 
-int av_fill_image_pointers(uint8_t *data[4], enum PixelFormat pix_fmt, int height,
+int av_image_fill_pointers(uint8_t *data[4], enum PixelFormat pix_fmt, int height,
                            uint8_t *ptr, const int linesizes[4])
 {
     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)
+    if ((unsigned)pix_fmt >= PIX_FMT_NB || desc->flags & PIX_FMT_HWACCEL)
         return AVERROR(EINVAL);
 
     data[0] = ptr;
     size[0] = linesizes[0] * height;
 
     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;
     }
@@ skipping 14 matching lines @@
 }
 
 typedef struct ImgUtils {
     const AVClass *class;
     int   log_offset;
     void *log_ctx;
 } ImgUtils;
 
 static const AVClass imgutils_class = { "IMGUTILS", av_default_item_name, NULL, LIBAVUTIL_VERSION_INT, offsetof(ImgUtils, log_offset), offsetof(ImgUtils, log_ctx) };
 
-int av_check_image_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
+int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
 {
     ImgUtils imgutils = { &imgutils_class, log_offset, log_ctx };
 
-    if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
+    if ((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
         return 0;
 
     av_log(&imgutils, AV_LOG_ERROR, "Picture size %ux%u is invalid\n", w, h);
     return AVERROR(EINVAL);
 }
+
+void av_image_copy_plane(uint8_t       *dst, int dst_linesize,
+                         const uint8_t *src, int src_linesize,
+                         int bytewidth, int height)
+{
+    if (!dst || !src)
+        return;
+    for (;height > 0; height--) {
+        memcpy(dst, src, bytewidth);
+        dst += dst_linesize;
+        src += src_linesize;
+    }
+}
+
+void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
+                   const uint8_t *src_data[4], const int src_linesizes[4],
+                   enum PixelFormat pix_fmt, int width, int height)
+{
+    const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
+
+    if (desc->flags & PIX_FMT_HWACCEL)
+        return;
+
+    if (desc->flags & PIX_FMT_PAL) {
+        av_image_copy_plane(dst_data[0], dst_linesizes[0],
+                            src_data[0], src_linesizes[0],
+                            width, height);
+        /* copy the palette */
+        memcpy(dst_data[1], src_data[1], 4*256);
+    } else {
+        int i, planes_nb = 0;
+
+        for (i = 0; i < desc->nb_components; i++)
+            planes_nb = FFMAX(planes_nb, desc->comp[i].plane + 1);
+
+        for (i = 0; i < planes_nb; i++) {
+            int h = height;
+            int bwidth = av_image_get_linesize(pix_fmt, width, i);
+            if (i == 1 || i == 2) {
+                h= -((-height)>>desc->log2_chroma_h);
+            }
+            av_image_copy_plane(dst_data[i], dst_linesizes[i],
+                                src_data[i], src_linesizes[i],
+                                bwidth, h);
+        }
+    }
+}
+
+#if FF_API_OLD_IMAGE_NAMES
+void av_fill_image_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
+                                const AVPixFmtDescriptor *pixdesc)
+{
+    av_image_fill_max_pixsteps(max_pixsteps, max_pixstep_comps, pixdesc);
+}
+
+int av_get_image_linesize(enum PixelFormat pix_fmt, int width, int plane)
+{
+    return av_image_get_linesize(pix_fmt, width, plane);
+}
+
+int av_fill_image_linesizes(int linesizes[4], enum PixelFormat pix_fmt, int width)
+{
+    return av_image_fill_linesizes(linesizes, pix_fmt, width);
+}
+
+int av_fill_image_pointers(uint8_t *data[4], enum PixelFormat pix_fmt, int height,
+                           uint8_t *ptr, const int linesizes[4])
+{
+    return av_image_fill_pointers(data, pix_fmt, height, ptr, linesizes);
+}
+
+int av_check_image_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
+{
+    return av_image_check_size(w, h, log_offset, log_ctx);
+}
+#endif