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https://github.com/xenia-project/FFmpeg.git
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106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/*
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* R210 decoder
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*
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* Copyright (c) 2009 Reimar Doeffinger <Reimar.Doeffinger@gmx.de>
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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 "avcodec.h"
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#include "internal.h"
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#include "libavutil/bswap.h"
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#include "libavutil/common.h"
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static av_cold int decode_init(AVCodecContext *avctx)
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{
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avctx->pix_fmt = AV_PIX_FMT_RGB48;
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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, void *data, int *got_frame,
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AVPacket *avpkt)
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{
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int h, w, ret;
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AVFrame *pic = data;
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const uint32_t *src = (const uint32_t *)avpkt->data;
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int aligned_width = FFALIGN(avctx->width, 64);
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uint8_t *dst_line;
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if (avpkt->size < 4 * aligned_width * avctx->height) {
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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 ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
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return ret;
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pic->pict_type = AV_PICTURE_TYPE_I;
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pic->key_frame = 1;
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dst_line = pic->data[0];
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for (h = 0; h < avctx->height; h++) {
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uint16_t *dst = (uint16_t *)dst_line;
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for (w = 0; w < avctx->width; w++) {
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uint32_t pixel = av_be2ne32(*src++);
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uint16_t r, g, b;
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if (avctx->codec_id==AV_CODEC_ID_R210) {
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b = pixel << 6;
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g = (pixel >> 4) & 0xffc0;
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r = (pixel >> 14) & 0xffc0;
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} else {
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b = pixel << 4;
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g = (pixel >> 6) & 0xffc0;
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r = (pixel >> 16) & 0xffc0;
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}
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*dst++ = r | (r >> 10);
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*dst++ = g | (g >> 10);
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*dst++ = b | (b >> 10);
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}
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src += aligned_width - avctx->width;
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dst_line += pic->linesize[0];
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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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#if CONFIG_R210_DECODER
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AVCodec ff_r210_decoder = {
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.name = "r210",
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.long_name = NULL_IF_CONFIG_SMALL("Uncompressed RGB 10-bit"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_R210,
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.init = decode_init,
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.decode = decode_frame,
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.capabilities = CODEC_CAP_DR1,
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};
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#endif
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#if CONFIG_R10K_DECODER
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AVCodec ff_r10k_decoder = {
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.name = "r10k",
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.long_name = NULL_IF_CONFIG_SMALL("AJA Kona 10-bit RGB Codec"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_R10K,
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.init = decode_init,
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.decode = decode_frame,
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.capabilities = CODEC_CAP_DR1,
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};
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#endif
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