/* * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at> * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "avcodec.h" #include "internal.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 AVERROR(EINVAL); } avctx->pix_fmt = AV_PIX_FMT_YUV422P16; avctx->bits_per_raw_sample = 10; return 0; } static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { const uint32_t *src = (const uint32_t *)avpkt->data; AVFrame *pic = data; int width = avctx->width; int y = 0; uint16_t *ydst, *udst, *vdst, *yend; int ret; if (avpkt->size < avctx->width * avctx->height * 8 / 3) { av_log(avctx, AV_LOG_ERROR, "Packet too small\n"); return AVERROR_INVALIDDATA; } if (avpkt->size > avctx->width * avctx->height * 8 / 3) { avpriv_request_sample(avctx, "(Probably) padded data"); } if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) return ret; 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; } } *got_frame = 1; return avpkt->size; } AVCodec ff_v210x_decoder = { .name = "v210x", .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_V210X, .init = decode_init, .decode = decode_frame, .capabilities = CODEC_CAP_DR1, };