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105 lines
2.8 KiB
105 lines
2.8 KiB
15 years ago
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/*
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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 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 "libavutil/bswap.h"
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static av_cold int decode_init(AVCodecContext *avctx)
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{
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avctx->pix_fmt = PIX_FMT_RGB48;
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avctx->bits_per_raw_sample = 10;
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avctx->coded_frame = avcodec_alloc_frame();
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return 0;
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}
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static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
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AVPacket *avpkt)
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{
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int h, w;
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AVFrame *pic = avctx->coded_frame;
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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 (pic->data[0])
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avctx->release_buffer(avctx, pic);
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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 -1;
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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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return -1;
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pic->pict_type = FF_I_TYPE;
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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 = be2me_32(*src++);
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uint16_t r, g, b;
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r = pixel << 6;
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g = (pixel >> 4) & 0xffc0;
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b = (pixel >> 14) & 0xffc0;
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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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*data_size = sizeof(AVFrame);
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*(AVFrame*)data = *avctx->coded_frame;
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return avpkt->size;
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}
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static av_cold int decode_close(AVCodecContext *avctx)
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{
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AVFrame *pic = avctx->coded_frame;
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if (pic->data[0])
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avctx->release_buffer(avctx, pic);
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av_freep(&avctx->coded_frame);
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return 0;
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}
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AVCodec r210_decoder = {
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"r210",
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CODEC_TYPE_VIDEO,
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CODEC_ID_R210,
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0,
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decode_init,
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NULL,
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decode_close,
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decode_frame,
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CODEC_CAP_DR1,
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.long_name = NULL_IF_CONFIG_SMALL("Uncompressed RGB 10-bit"),
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};
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