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/*
* AVPicture management routines
* Copyright (c) 2001, 2002, 2003 Fabrice Bellard
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* AVPicture management routines
*/
#include "avcodec.h"
#include "internal.h"
#include "libavutil/common.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/colorspace.h"
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
enum AVPixelFormat pix_fmt, int width, int height)
{
int ret;
if ((ret = av_image_check_size(width, height, 0, NULL)) < 0)
return ret;
if ((ret = av_image_fill_linesizes(picture->linesize, pix_fmt, width)) < 0)
return ret;
return av_image_fill_pointers(picture->data, pix_fmt,
height, ptr, picture->linesize);
}
int avpicture_layout(const AVPicture* src, enum AVPixelFormat pix_fmt,
int width, int height,
unsigned char *dest, int dest_size)
{
int i, j, nb_planes = 0, linesizes[4];
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
int size = avpicture_get_size(pix_fmt, width, height);
if (size > dest_size || size < 0)
return AVERROR(EINVAL);
for (i = 0; i < desc->nb_components; i++)
nb_planes = FFMAX(desc->comp[i].plane, nb_planes);
nb_planes++;
av_image_fill_linesizes(linesizes, pix_fmt, width);
for (i = 0; i < nb_planes; i++) {
int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
const unsigned char *s = src->data[i];
h = (height + (1 << shift) - 1) >> shift;
for (j = 0; j < h; j++) {
memcpy(dest, s, linesizes[i]);
dest += linesizes[i];
s += src->linesize[i];
}
}
if (desc->flags & PIX_FMT_PAL)
memcpy((unsigned char *)(((size_t)dest + 3) & ~3),
src->data[1], 256 * 4);
return size;
}
int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
AVPicture dummy_pict;
int ret;
if (!desc)
return AVERROR(EINVAL);
if ((ret = av_image_check_size(width, height, 0, NULL)) < 0)
return ret;
if (desc->flags & PIX_FMT_PSEUDOPAL)
// do not include palette for these pseudo-paletted formats
return width * height;
return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height);
}
int avpicture_alloc(AVPicture *picture,
enum AVPixelFormat pix_fmt, int width, int height)
{
int ret = av_image_alloc(picture->data, picture->linesize,
width, height, pix_fmt, 1);
if (ret < 0) {
memset(picture, 0, sizeof(AVPicture));
return ret;
}
return 0;
}
void avpicture_free(AVPicture *picture)
{
av_free(picture->data[0]);
}
void av_picture_copy(AVPicture *dst, const AVPicture *src,
enum AVPixelFormat pix_fmt, int width, int height)
{
av_image_copy(dst->data, dst->linesize, src->data,
src->linesize, pix_fmt, width, height);
}
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