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/*
* 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_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(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_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;
}
}
for (i = 0; i < 4; i++) {
int s = (max_step_comp[i] == 1 || max_step_comp[i] == 2) ? desc->log2_chroma_w : 0;
linesize[i] = max_step[i] * (((width + (1 << s) - 1)) >> s);
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}
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;
}
}