r210dec.c 3.17 KB
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/*
 * R210 decoder
 *
 * Copyright (c) 2009 Reimar Doeffinger <Reimar.Doeffinger@gmx.de>
 *
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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
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
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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
 * 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
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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
 */

#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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    avctx->pix_fmt             = AV_PIX_FMT_RGB48;
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    avctx->bits_per_raw_sample = 10;

    return 0;
}

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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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    int h, w, ret;
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    AVFrame *pic = data;
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    const uint32_t *src = (const uint32_t *)avpkt->data;
    int aligned_width = FFALIGN(avctx->width, 64);
    uint8_t *dst_line;

    if (avpkt->size < 4 * aligned_width * avctx->height) {
        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;
    dst_line = pic->data[0];

    for (h = 0; h < avctx->height; h++) {
        uint16_t *dst = (uint16_t *)dst_line;
        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;
                g = (pixel >>  4) & 0xffc0;
                r = (pixel >> 14) & 0xffc0;
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            } else {
                b =  pixel <<  4;
                g = (pixel >>  6) & 0xffc0;
                r = (pixel >> 16) & 0xffc0;
            }
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            *dst++ = r | (r >> 10);
            *dst++ = g | (g >> 10);
            *dst++ = b | (b >> 10);
        }
        src += aligned_width - avctx->width;
        dst_line += pic->linesize[0];
    }

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    *got_frame      = 1;
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    return avpkt->size;
}

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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,
    .decode         = decode_frame,
    .capabilities   = CODEC_CAP_DR1,
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};
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#endif
#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,
    .decode         = decode_frame,
    .capabilities   = CODEC_CAP_DR1,
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};
#endif