mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-18 03:19:31 +02:00
138 lines
3.8 KiB
C
138 lines
3.8 KiB
C
/*
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* Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avcodec.h"
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#include "libavutil/bswap.h"
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static av_cold int decode_init(AVCodecContext *avctx)
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{
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if(avctx->width & 1){
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av_log(avctx, AV_LOG_ERROR, "v210x needs even width\n");
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return -1;
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}
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if(avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0)
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return -1;
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avctx->pix_fmt = PIX_FMT_YUV422P16;
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avctx->bits_per_raw_sample= 10;
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avctx->coded_frame= avcodec_alloc_frame();
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return 0;
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}
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static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
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{
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int y=0;
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int width= avctx->width;
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AVFrame *pic= avctx->coded_frame;
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const uint32_t *src= (const uint32_t *)avpkt->data;
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uint16_t *ydst, *udst, *vdst, *yend;
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if(pic->data[0])
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avctx->release_buffer(avctx, pic);
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if(avpkt->size < avctx->width * avctx->height * 8 / 3){
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av_log(avctx, AV_LOG_ERROR, "Packet too small\n");
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return -1;
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}
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if(avpkt->size > avctx->width * avctx->height * 8 / 3){
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av_log(avctx, AV_LOG_ERROR, "Probably padded data, need sample!\n");
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}
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pic->reference= 0;
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if(avctx->get_buffer(avctx, pic) < 0)
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return -1;
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ydst= (uint16_t *)pic->data[0];
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udst= (uint16_t *)pic->data[1];
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vdst= (uint16_t *)pic->data[2];
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yend= ydst + width;
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pic->pict_type= FF_I_TYPE;
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pic->key_frame= 1;
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for(;;){
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uint32_t v= be2me_32(*src++);
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*udst++= (v>>16) & 0xFFC0;
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*ydst++= (v>>6 ) & 0xFFC0;
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*vdst++= (v<<4 ) & 0xFFC0;
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v= be2me_32(*src++);
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*ydst++= (v>>16) & 0xFFC0;
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if(ydst >= yend){
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ydst+= pic->linesize[0]/2 - width;
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udst+= pic->linesize[1]/2 - width/2;
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vdst+= pic->linesize[2]/2 - width/2;
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yend= ydst + width;
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if(++y >= avctx->height)
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break;
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}
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*udst++= (v>>6 ) & 0xFFC0;
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*ydst++= (v<<4 ) & 0xFFC0;
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v= be2me_32(*src++);
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*vdst++= (v>>16) & 0xFFC0;
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*ydst++= (v>>6 ) & 0xFFC0;
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if(ydst >= yend){
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ydst+= pic->linesize[0]/2 - width;
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udst+= pic->linesize[1]/2 - width/2;
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vdst+= pic->linesize[2]/2 - width/2;
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yend= ydst + width;
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if(++y >= avctx->height)
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break;
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}
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*udst++= (v<<4 ) & 0xFFC0;
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v= be2me_32(*src++);
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*ydst++= (v>>16) & 0xFFC0;
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*vdst++= (v>>6 ) & 0xFFC0;
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*ydst++= (v<<4 ) & 0xFFC0;
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if(ydst >= yend){
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ydst+= pic->linesize[0]/2 - width;
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udst+= pic->linesize[1]/2 - width/2;
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vdst+= pic->linesize[2]/2 - width/2;
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yend= ydst + width;
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if(++y >= avctx->height)
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break;
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}
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}
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*data_size=sizeof(AVFrame);
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*(AVFrame*)data= *avctx->coded_frame;
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return avpkt->size;
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}
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AVCodec v210x_decoder = {
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"v210x",
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CODEC_TYPE_VIDEO,
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CODEC_ID_V210X,
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0,
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decode_init,
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NULL,
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NULL,
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decode_frame,
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CODEC_CAP_DR1,
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};
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