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/*
* 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 "libavutil/intreadwrite.h"
#include "libavcodec/packet.h"
#include "avformat.h"
#include "rawutils.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;
}
int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette)
{
uint8_t *side_data;
size_t size;
side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_PALETTE, &size);
if (side_data) {
if (size != AVPALETTE_SIZE) {
av_log(s, AV_LOG_ERROR, "Invalid palette side data\n");
return AVERROR_INVALIDDATA;
}
memcpy(palette, side_data, AVPALETTE_SIZE);
return 1;
}
if (ret == CONTAINS_PAL) {
for (int i = 0; i < AVPALETTE_COUNT; i++)
palette[i] = AV_RL32(pkt->data + pkt->size - AVPALETTE_SIZE + i*4);
return 1;
}
return 0;
}
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