mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-24 19:59:46 +00:00
127 lines
3.3 KiB
C
127 lines
3.3 KiB
C
/*
|
|
* Sunplus JPEG decoder (SP5X)
|
|
* Copyright (c) 2003 Alex Beregszaszi
|
|
*
|
|
* 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
|
|
* Sunplus JPEG decoder (SP5X).
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
#include "mjpeg.h"
|
|
#include "mjpegdec.h"
|
|
#include "sp5x.h"
|
|
|
|
|
|
static int sp5x_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
AVPacket avpkt_recoded;
|
|
const int qscale = 5;
|
|
const uint8_t *buf_ptr;
|
|
uint8_t *recoded;
|
|
int i = 0, j = 0;
|
|
|
|
if (!avctx->width || !avctx->height)
|
|
return -1;
|
|
|
|
buf_ptr = buf;
|
|
|
|
recoded = av_mallocz(buf_size + 1024);
|
|
if (!recoded)
|
|
return -1;
|
|
|
|
/* SOI */
|
|
recoded[j++] = 0xFF;
|
|
recoded[j++] = 0xD8;
|
|
|
|
memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));
|
|
memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64);
|
|
memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64);
|
|
j += sizeof(sp5x_data_dqt);
|
|
|
|
memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));
|
|
j += sizeof(sp5x_data_dht);
|
|
|
|
memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
|
|
AV_WB16(recoded+j+5, avctx->coded_height);
|
|
AV_WB16(recoded+j+7, avctx->coded_width);
|
|
j += sizeof(sp5x_data_sof);
|
|
|
|
memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));
|
|
j += sizeof(sp5x_data_sos);
|
|
|
|
if(avctx->codec_id==CODEC_ID_AMV)
|
|
for (i = 2; i < buf_size-2 && j < buf_size+1024-2; i++)
|
|
recoded[j++] = buf[i];
|
|
else
|
|
for (i = 14; i < buf_size && j < buf_size+1024-2; i++)
|
|
{
|
|
recoded[j++] = buf[i];
|
|
if (buf[i] == 0xff)
|
|
recoded[j++] = 0;
|
|
}
|
|
|
|
/* EOI */
|
|
recoded[j++] = 0xFF;
|
|
recoded[j++] = 0xD9;
|
|
|
|
avctx->flags &= ~CODEC_FLAG_EMU_EDGE;
|
|
av_init_packet(&avpkt_recoded);
|
|
avpkt_recoded.data = recoded;
|
|
avpkt_recoded.size = j;
|
|
i = ff_mjpeg_decode_frame(avctx, data, data_size, &avpkt_recoded);
|
|
|
|
av_free(recoded);
|
|
|
|
return i;
|
|
}
|
|
|
|
AVCodec sp5x_decoder = {
|
|
"sp5x",
|
|
AVMEDIA_TYPE_VIDEO,
|
|
CODEC_ID_SP5X,
|
|
sizeof(MJpegDecodeContext),
|
|
ff_mjpeg_decode_init,
|
|
NULL,
|
|
ff_mjpeg_decode_end,
|
|
sp5x_decode_frame,
|
|
CODEC_CAP_DR1,
|
|
NULL,
|
|
.max_lowres = 5,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Sunplus JPEG (SP5X)"),
|
|
};
|
|
|
|
AVCodec amv_decoder = {
|
|
"amv",
|
|
AVMEDIA_TYPE_VIDEO,
|
|
CODEC_ID_AMV,
|
|
sizeof(MJpegDecodeContext),
|
|
ff_mjpeg_decode_init,
|
|
NULL,
|
|
ff_mjpeg_decode_end,
|
|
sp5x_decode_frame,
|
|
CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("AMV Video"),
|
|
};
|