yading@10: /*
yading@10:  * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "internal.h"
yading@10: #include "libavutil/bswap.h"
yading@10: #include "libavutil/internal.h"
yading@10: #include "libavutil/mem.h"
yading@10: 
yading@10: static av_cold int decode_init(AVCodecContext *avctx)
yading@10: {
yading@10:     if (avctx->width & 1) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "v210x needs even width\n");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10:     avctx->pix_fmt             = AV_PIX_FMT_YUV422P16;
yading@10:     avctx->bits_per_raw_sample = 10;
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
yading@10:                         AVPacket *avpkt)
yading@10: {
yading@10:     const uint32_t *src = (const uint32_t *)avpkt->data;
yading@10:     AVFrame *pic        = data;
yading@10:     int width           = avctx->width;
yading@10:     int y               = 0;
yading@10:     uint16_t *ydst, *udst, *vdst, *yend;
yading@10:     int ret;
yading@10: 
yading@10:     if (avpkt->size < avctx->width * avctx->height * 8 / 3) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Packet too small\n");
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10: 
yading@10:     if (avpkt->size > avctx->width * avctx->height * 8 / 3) {
yading@10:         avpriv_request_sample(avctx, "(Probably) padded data");
yading@10:     }
yading@10: 
yading@10:     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     ydst = (uint16_t *)pic->data[0];
yading@10:     udst = (uint16_t *)pic->data[1];
yading@10:     vdst = (uint16_t *)pic->data[2];
yading@10:     yend = ydst + width;
yading@10:     pic->pict_type = AV_PICTURE_TYPE_I;
yading@10:     pic->key_frame = 1;
yading@10: 
yading@10:     for (;;) {
yading@10:         uint32_t v = av_be2ne32(*src++);
yading@10:         *udst++ = (v >> 16) & 0xFFC0;
yading@10:         *ydst++ = (v >> 6 ) & 0xFFC0;
yading@10:         *vdst++ = (v << 4 ) & 0xFFC0;
yading@10: 
yading@10:         v       = av_be2ne32(*src++);
yading@10:         *ydst++ = (v >> 16) & 0xFFC0;
yading@10: 
yading@10:         if (ydst >= yend) {
yading@10:             ydst += pic->linesize[0] / 2 - width;
yading@10:             udst += pic->linesize[1] / 2 - width / 2;
yading@10:             vdst += pic->linesize[2] / 2 - width / 2;
yading@10:             yend = ydst + width;
yading@10:             if (++y >= avctx->height)
yading@10:                 break;
yading@10:         }
yading@10: 
yading@10:         *udst++ = (v >> 6 ) & 0xFFC0;
yading@10:         *ydst++ = (v << 4 ) & 0xFFC0;
yading@10: 
yading@10:         v = av_be2ne32(*src++);
yading@10:         *vdst++ = (v >> 16) & 0xFFC0;
yading@10:         *ydst++ = (v >> 6 ) & 0xFFC0;
yading@10: 
yading@10:         if (ydst >= yend) {
yading@10:             ydst += pic->linesize[0] / 2 - width;
yading@10:             udst += pic->linesize[1] / 2 - width / 2;
yading@10:             vdst += pic->linesize[2] / 2 - width / 2;
yading@10:             yend  = ydst + width;
yading@10:             if (++y >= avctx->height)
yading@10:                 break;
yading@10:         }
yading@10: 
yading@10:         *udst++ = (v << 4 ) & 0xFFC0;
yading@10: 
yading@10:         v = av_be2ne32(*src++);
yading@10:         *ydst++ = (v >> 16) & 0xFFC0;
yading@10:         *vdst++ = (v >> 6 ) & 0xFFC0;
yading@10:         *ydst++ = (v << 4 ) & 0xFFC0;
yading@10:         if (ydst >= yend) {
yading@10:             ydst += pic->linesize[0] / 2 - width;
yading@10:             udst += pic->linesize[1] / 2 - width / 2;
yading@10:             vdst += pic->linesize[2] / 2 - width / 2;
yading@10:             yend  = ydst + width;
yading@10:             if (++y >= avctx->height)
yading@10:                 break;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     *got_frame = 1;
yading@10: 
yading@10:     return avpkt->size;
yading@10: }
yading@10: 
yading@10: AVCodec ff_v210x_decoder = {
yading@10:     .name           = "v210x",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_V210X,
yading@10:     .init           = decode_init,
yading@10:     .decode         = decode_frame,
yading@10:     .capabilities   = CODEC_CAP_DR1,
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
yading@10: };