/* * 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" #include "libavutil/internal.h" #include "libavutil/mem.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 = AV_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 = AV_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"), };