67 lines
2.2 KiB
C
Executable file
67 lines
2.2 KiB
C
Executable file
/*
|
|
* Raw video utils
|
|
* Copyright (c) 2016 Michael Niedermayer
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride)
|
|
{
|
|
int ret;
|
|
AVPacket *pkt = *ppkt;
|
|
int64_t bpc = par->bits_per_coded_sample != 15 ? par->bits_per_coded_sample : 16;
|
|
int min_stride = (par->width * bpc + 7) >> 3;
|
|
int with_pal_size = min_stride * par->height + 1024;
|
|
int contains_pal = bpc == 8 && pkt->size == with_pal_size;
|
|
int size = contains_pal ? min_stride * par->height : pkt->size;
|
|
int stride = size / par->height;
|
|
int padding = expected_stride - FFMIN(expected_stride, stride);
|
|
int y;
|
|
AVPacket *new_pkt;
|
|
|
|
if (pkt->size == expected_stride * par->height)
|
|
return 0;
|
|
if (size != stride * par->height)
|
|
return 0;
|
|
|
|
new_pkt = av_packet_alloc();
|
|
if (!new_pkt)
|
|
return AVERROR(ENOMEM);
|
|
|
|
ret = av_new_packet(new_pkt, expected_stride * par->height);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
ret = av_packet_copy_props(new_pkt, pkt);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
for (y = 0; y<par->height; y++) {
|
|
memcpy(new_pkt->data + y*expected_stride, pkt->data + y*stride, FFMIN(expected_stride, stride));
|
|
memset(new_pkt->data + y*expected_stride + expected_stride - padding, 0, padding);
|
|
}
|
|
|
|
*ppkt = new_pkt;
|
|
return 1 + contains_pal;
|
|
fail:
|
|
av_packet_free(&new_pkt);
|
|
|
|
return ret;
|
|
}
|