Move fill_image_linesize() and fill_image_data_ptr() from

libavcodec/imgconvert.c and make them public in libavcore/imgutils.h,
with the names av_fill_image_linesizes() and av_fill_image_pointers().

Originally committed as revision 24583 to svn://svn.ffmpeg.org/ffmpeg/trunk

4 files changed, 221 insertions, 2 deletions

diff --git a/libavcore/Makefile b/libavcore/Makefile
index 4c1f9fcc5f..5e16c34fbd 100644
--- a/libavcore/Makefile
+++ b/libavcore/Makefile
@@ -4,9 +4,11 @@ NAME = avcore
 FFLIBS = avutil
 
 HEADERS = avcore.h                                                      \
+          imgutils.h                                                    \
           parseutils.h                                                  \
 
-OBJS = parseutils.o                                                     \
+OBJS = imgutils.o                                                       \
+       parseutils.o                                                     \
        utils.o                                                          \
 
 include $(SUBDIR)../subdir.mak
diff --git a/libavcore/avcore.h b/libavcore/avcore.h
index 4b35a603ec..5ddb6167aa 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  1
+#define LIBAVCORE_VERSION_MINOR  2
 #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
new file mode 100644
index 0000000000..e7e016cd5a
--- /dev/null
+++ b/libavcore/imgutils.c
@@ -0,0 +1,164 @@
+/*
+ * 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 linesize[4], enum PixelFormat pix_fmt, int width)
+{
+    int i;
+    const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
+    int max_plane_step     [4];
+    int max_plane_step_comp[4];
+
+    memset(linesize, 0, 4*sizeof(linesize[0]));
+
+    if (desc->flags & PIX_FMT_HWACCEL)
+        return -1;
+
+    if (desc->flags & PIX_FMT_BITSTREAM) {
+        linesize[0] = (width * (desc->comp[0].step_minus1+1) + 7) >> 3;
+        return 0;
+    }
+
+    memset(max_plane_step     , 0, sizeof(max_plane_step     ));
+    memset(max_plane_step_comp, 0, sizeof(max_plane_step_comp));
+    for (i = 0; i < 4; i++) {
+        const AVComponentDescriptor *comp = &(desc->comp[i]);
+        if ((comp->step_minus1+1) > max_plane_step[comp->plane]) {
+            max_plane_step     [comp->plane] = comp->step_minus1+1;
+            max_plane_step_comp[comp->plane] = i;
+        }
+    }
+
+    for (i = 0; i < 4; i++) {
+        int s = (max_plane_step_comp[i] == 1 || max_plane_step_comp[i] == 2) ? desc->log2_chroma_w : 0;
+        linesize[i] = max_plane_step[i] * (((width + (1 << s) - 1)) >> s);
+    }
+
+    return 0;
+}
+
+int av_fill_image_pointers(uint8_t *data[4], enum PixelFormat pix_fmt, int height,
+                           uint8_t *ptr, const int linesize[4])
+{
+    int size, h2, size2;
+    const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
+
+    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;
+    }
+}
diff --git a/libavcore/imgutils.h b/libavcore/imgutils.h
new file mode 100644
index 0000000000..4a4d6a1521
--- /dev/null
+++ b/libavcore/imgutils.h
@@ -0,0 +1,53 @@
+/*
+ * 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
+ */
+
+#ifndef AVCORE_IMGUTILS_H
+#define AVCORE_IMGUTILS_H
+
+/**
+ * @file
+ * misc image utilities
+ */
+
+#include "libavutil/pixfmt.h"
+#include "avcore.h"
+
+/**
+ * Fill plane linesizes for an image with pixel format pix_fmt and
+ * width width.
+ *
+ * @param linesizes array to be filled with the linesize for each plane
+ * @return >= 0 in case of success, a negative error code otherwise
+ */
+int av_fill_image_linesizes(int linesizes[4], enum PixelFormat pix_fmt, int width);
+
+/**
+ * Fill plane data pointers for an image with pixel format pix_fmt and
+ * height height.
+ *
+ * @param data pointers array to be filled with the pointer for each image plane
+ * @param ptr the pointer to a buffer which will contain the image
+ * @param linesizes[4] the array containing the linesize for each
+ * plane, should be filled by av_fill_image_linesizes()
+ * @return the size in bytes required for the image buffer, a negative
+ * error code in case of failure
+ */
+int av_fill_image_pointers(uint8_t *data[4], enum PixelFormat pix_fmt, int height,
+                           uint8_t *ptr, const int linesizes[4]);
+
+#endif /* AVCORE_IMGUTILS_H */