mirror of
https://github.com/librempeg/librempeg
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124 lines
3.4 KiB
C
124 lines
3.4 KiB
C
/*
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* v410 decoder
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*
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* Copyright (c) 2011 Derek Buitenhuis
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "avcodec.h"
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static av_cold int v410_decode_init(AVCodecContext *avctx)
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{
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avctx->pix_fmt = PIX_FMT_YUV444P10;
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avctx->bits_per_raw_sample = 10;
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if (avctx->width & 1) {
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if (avctx->err_recognition & AV_EF_EXPLODE) {
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av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n");
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return AVERROR_INVALIDDATA;
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} else {
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av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n");
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}
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}
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avctx->coded_frame = avcodec_alloc_frame();
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if (!avctx->coded_frame) {
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av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
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return AVERROR(ENOMEM);
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}
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return 0;
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}
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static int v410_decode_frame(AVCodecContext *avctx, void *data,
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int *data_size, AVPacket *avpkt)
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{
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AVFrame *pic = avctx->coded_frame;
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uint8_t *src = avpkt->data;
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uint16_t *y, *u, *v;
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uint32_t val;
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int i, j;
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if (pic->data[0])
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avctx->release_buffer(avctx, pic);
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if (avpkt->size < 4 * avctx->height * avctx->width) {
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av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
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return AVERROR(EINVAL);
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}
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pic->reference = 0;
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if (avctx->get_buffer(avctx, pic) < 0) {
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av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
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return AVERROR(ENOMEM);
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}
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pic->key_frame = 1;
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pic->pict_type = AV_PICTURE_TYPE_I;
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y = (uint16_t *)pic->data[0];
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u = (uint16_t *)pic->data[1];
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v = (uint16_t *)pic->data[2];
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for (i = 0; i < avctx->height; i++) {
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for (j = 0; j < avctx->width; j++) {
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val = AV_RL32(src);
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u[j] = (val >> 2) & 0x3FF;
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y[j] = (val >> 12) & 0x3FF;
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v[j] = (val >> 22);
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src += 4;
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}
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y += pic->linesize[0] >> 1;
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u += pic->linesize[1] >> 1;
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v += pic->linesize[2] >> 1;
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}
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*data_size = sizeof(AVFrame);
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*(AVFrame *)data = *pic;
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return avpkt->size;
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}
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static av_cold int v410_decode_close(AVCodecContext *avctx)
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{
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if (avctx->coded_frame->data[0])
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avctx->release_buffer(avctx, avctx->coded_frame);
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av_freep(&avctx->coded_frame);
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return 0;
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}
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AVCodec ff_v410_decoder = {
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.name = "v410",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_V410,
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.init = v410_decode_init,
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.decode = v410_decode_frame,
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.close = v410_decode_close,
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.capabilities = CODEC_CAP_DR1,
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.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
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};
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