mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-22 01:05:05 +02:00
145 lines
4.1 KiB
C
145 lines
4.1 KiB
C
/*
|
|
* Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
#include "libavutil/bswap.h"
|
|
|
|
static av_cold int decode_init(AVCodecContext *avctx)
|
|
{
|
|
if(avctx->width & 1){
|
|
av_log(avctx, AV_LOG_ERROR, "v210x needs even width\n");
|
|
return -1;
|
|
}
|
|
avctx->pix_fmt = PIX_FMT_YUV422P16;
|
|
avctx->bits_per_raw_sample= 10;
|
|
|
|
avctx->coded_frame= avcodec_alloc_frame();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
|
|
{
|
|
int y=0;
|
|
int width= avctx->width;
|
|
AVFrame *pic= avctx->coded_frame;
|
|
const uint32_t *src= (const uint32_t *)avpkt->data;
|
|
uint16_t *ydst, *udst, *vdst, *yend;
|
|
|
|
if(pic->data[0])
|
|
avctx->release_buffer(avctx, pic);
|
|
|
|
if(avpkt->size < avctx->width * avctx->height * 8 / 3){
|
|
av_log(avctx, AV_LOG_ERROR, "Packet too small\n");
|
|
return -1;
|
|
}
|
|
|
|
if(avpkt->size > avctx->width * avctx->height * 8 / 3){
|
|
av_log_ask_for_sample(avctx, "Probably padded data\n");
|
|
}
|
|
|
|
pic->reference= 0;
|
|
if(avctx->get_buffer(avctx, pic) < 0)
|
|
return -1;
|
|
|
|
ydst= (uint16_t *)pic->data[0];
|
|
udst= (uint16_t *)pic->data[1];
|
|
vdst= (uint16_t *)pic->data[2];
|
|
yend= ydst + width;
|
|
pic->pict_type= AV_PICTURE_TYPE_I;
|
|
pic->key_frame= 1;
|
|
|
|
for(;;){
|
|
uint32_t v= av_be2ne32(*src++);
|
|
*udst++= (v>>16) & 0xFFC0;
|
|
*ydst++= (v>>6 ) & 0xFFC0;
|
|
*vdst++= (v<<4 ) & 0xFFC0;
|
|
|
|
v= av_be2ne32(*src++);
|
|
*ydst++= (v>>16) & 0xFFC0;
|
|
|
|
if(ydst >= yend){
|
|
ydst+= pic->linesize[0]/2 - width;
|
|
udst+= pic->linesize[1]/2 - width/2;
|
|
vdst+= pic->linesize[2]/2 - width/2;
|
|
yend= ydst + width;
|
|
if(++y >= avctx->height)
|
|
break;
|
|
}
|
|
|
|
*udst++= (v>>6 ) & 0xFFC0;
|
|
*ydst++= (v<<4 ) & 0xFFC0;
|
|
|
|
v= av_be2ne32(*src++);
|
|
*vdst++= (v>>16) & 0xFFC0;
|
|
*ydst++= (v>>6 ) & 0xFFC0;
|
|
|
|
if(ydst >= yend){
|
|
ydst+= pic->linesize[0]/2 - width;
|
|
udst+= pic->linesize[1]/2 - width/2;
|
|
vdst+= pic->linesize[2]/2 - width/2;
|
|
yend= ydst + width;
|
|
if(++y >= avctx->height)
|
|
break;
|
|
}
|
|
|
|
*udst++= (v<<4 ) & 0xFFC0;
|
|
|
|
v= av_be2ne32(*src++);
|
|
*ydst++= (v>>16) & 0xFFC0;
|
|
*vdst++= (v>>6 ) & 0xFFC0;
|
|
*ydst++= (v<<4 ) & 0xFFC0;
|
|
if(ydst >= yend){
|
|
ydst+= pic->linesize[0]/2 - width;
|
|
udst+= pic->linesize[1]/2 - width/2;
|
|
vdst+= pic->linesize[2]/2 - width/2;
|
|
yend= ydst + width;
|
|
if(++y >= avctx->height)
|
|
break;
|
|
}
|
|
}
|
|
|
|
*data_size=sizeof(AVFrame);
|
|
*(AVFrame*)data= *avctx->coded_frame;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
static av_cold int decode_close(AVCodecContext *avctx)
|
|
{
|
|
AVFrame *pic = avctx->coded_frame;
|
|
if (pic->data[0])
|
|
avctx->release_buffer(avctx, pic);
|
|
av_freep(&avctx->coded_frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_v210x_decoder = {
|
|
.name = "v210x",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_V210X,
|
|
.init = decode_init,
|
|
.close = decode_close,
|
|
.decode = decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
|
|
};
|