mirror of
https://github.com/librempeg/librempeg
synced 2024-11-23 11:39:47 +00:00
131 lines
3.9 KiB
C
131 lines
3.9 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 "codec_internal.h"
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#include "decode.h"
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#include "libavutil/bswap.h"
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#include "libavutil/internal.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 AVERROR(EINVAL);
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}
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avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
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avctx->bits_per_raw_sample = 10;
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return 0;
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}
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static int decode_frame(AVCodecContext *avctx, AVFrame *pic,
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int *got_frame, AVPacket *avpkt)
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{
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const uint32_t *src = (const uint32_t *)avpkt->data;
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int width = avctx->width;
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int y = 0;
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uint16_t *ydst, *udst, *vdst, *yend;
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int ret;
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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 AVERROR_INVALIDDATA;
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}
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if (avpkt->size > avctx->width * avctx->height * 8 / 3) {
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avpriv_request_sample(avctx, "(Probably) padded data");
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}
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if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
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return ret;
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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 = AV_PICTURE_TYPE_I;
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pic->flags |= AV_FRAME_FLAG_KEY;
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for (;;) {
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uint32_t v = av_be2ne32(*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 = av_be2ne32(*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 = av_be2ne32(*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 = av_be2ne32(*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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*got_frame = 1;
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return avpkt->size;
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}
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const FFCodec ff_v210x_decoder = {
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.p.name = "v210x",
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CODEC_LONG_NAME("Uncompressed 4:2:2 10-bit"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_V210X,
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.init = decode_init,
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FF_CODEC_DECODE_CB(decode_frame),
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.p.capabilities = AV_CODEC_CAP_DR1,
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};
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