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/*
* Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
*
* 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 "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();
if (!avctx->coded_frame)
return AVERROR(ENOMEM);
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"),
};
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