mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-30 14:40:32 +00:00
126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/*
|
|
* 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 & AV_PIX_FMT_FLAG_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 & AV_PIX_FMT_FLAG_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);
|
|
}
|
|
|