diff options
Diffstat (limited to 'libavcodec/v210x.c')
| -rw-r--r-- | libavcodec/v210x.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/libavcodec/v210x.c b/libavcodec/v210x.c new file mode 100644 index 0000000000..b944666d3e --- /dev/null +++ b/libavcodec/v210x.c @@ -0,0 +1,137 @@ +/* + * 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; + } + if(avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) + 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= 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(avctx, AV_LOG_ERROR, "Probably padded data, need sample!\n"); + } + + pic->reference= 0; + if(avctx->get_buffer(avctx, pic) < 0) + return -1; + + ydst= pic->data[0]; + udst= pic->data[1]; + vdst= pic->data[2]; + yend= ydst + width; + pic->pict_type= FF_I_TYPE; + pic->key_frame= 1; + + for(;;){ + uint32_t v= be2me_32(*src++); + *udst++= (v>>16) & 0xFFC0; + *ydst++= (v>>6 ) & 0xFFC0; + *vdst++= (v<<4 ) & 0xFFC0; + + v= be2me_32(*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= be2me_32(*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= be2me_32(*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; +} + +AVCodec v210x_decoder = { + "v210x", + CODEC_TYPE_VIDEO, + CODEC_ID_V210X, + 0, + decode_init, + NULL, + NULL, + decode_frame, + CODEC_CAP_DR1, +}; |