/*

 * R210 decoder

 *

 * Copyright (c) 2009 Reimar Doeffinger <Reimar.Doeffinger@gmx.de>

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * 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.

 *

 * FFmpeg is distributed in the hope that it will be useful,

 * 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

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include "avcodec.h"

#include "codec_internal.h"

#include "config_components.h"

#include "decode.h"

#include "libavutil/bswap.h"

#include "libavutil/common.h"

static av_cold int decode_init(AVCodecContext *avctx)

{

    avctx->pix_fmt = AV_PIX_FMT_GBRP10;

    avctx->bits_per_raw_sample = 10;

    return 0;

}

static int decode_frame(AVCodecContext *avctx, AVFrame *pic,

                        int *got_frame, AVPacket *avpkt)

{

    int h, w, ret;

    const uint32_t *src = (const uint32_t *)avpkt->data;

    int aligned_width = FFALIGN(avctx->width,

                                avctx->codec_id == AV_CODEC_ID_R10K ? 1 : 64);

    uint8_t *g_line, *b_line, *r_line;

    int r10 = (avctx->codec_tag & 0xFFFFFF) == MKTAG('r', '1', '0', 0);

    int le = avctx->codec_tag == MKTAG('R', '1', '0', 'k') &&

             avctx->extradata_size >= 12 && !memcmp(&avctx->extradata[4], "DpxE", 4) &&

             !avctx->extradata[11];

    if (avpkt->size < 4 * aligned_width * avctx->height) {

        av_log(avctx, AV_LOG_ERROR, "packet too small\n");

        return AVERROR_INVALIDDATA;

    }

    if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)

        return ret;

    g_line = pic->data[0];

    b_line = pic->data[1];

    r_line = pic->data[2];

    for (h = 0; h < avctx->height; h++) {

        uint16_t *dstg = (uint16_t *)g_line;

        uint16_t *dstb = (uint16_t *)b_line;

        uint16_t *dstr = (uint16_t *)r_line;

        for (w = 0; w < avctx->width; w++) {

            uint32_t pixel;

            uint16_t r, g, b;

            if (avctx->codec_id == AV_CODEC_ID_AVRP || r10 || le) {

                pixel = av_le2ne32(*src++);

            } else {

                pixel = av_be2ne32(*src++);

            }

            if (avctx->codec_id == AV_CODEC_ID_R210) {

                b =  pixel & 0x3ff;

                g = (pixel >> 10) & 0x3ff;

                r = (pixel >> 20) & 0x3ff;

            } else if (r10) {

                r =  pixel & 0x3ff;

                g = (pixel >> 10) & 0x3ff;

                b = (pixel >> 20) & 0x3ff;

            } else {

                b = (pixel >>  2) & 0x3ff;

                g = (pixel >> 12) & 0x3ff;

                r = (pixel >> 22) & 0x3ff;

            }

            *dstr++ = r;

            *dstg++ = g;

            *dstb++ = b;

        }

        src += aligned_width - avctx->width;

        g_line += pic->linesize[0];

        b_line += pic->linesize[1];

        r_line += pic->linesize[2];

    }

    *got_frame      = 1;

    return avpkt->size;

}

#if CONFIG_R210_DECODER

const FFCodec ff_r210_decoder = {

    .p.name         = "r210",

    CODEC_LONG_NAME("Uncompressed RGB 10-bit"),

    .p.type         = AVMEDIA_TYPE_VIDEO,

    .p.id           = AV_CODEC_ID_R210,

    .init           = decode_init,

    FF_CODEC_DECODE_CB(decode_frame),

    .p.capabilities = AV_CODEC_CAP_DR1,

};

#endif

#if CONFIG_R10K_DECODER

const FFCodec ff_r10k_decoder = {

    .p.name         = "r10k",

    CODEC_LONG_NAME("AJA Kona 10-bit RGB Codec"),

    .p.type         = AVMEDIA_TYPE_VIDEO,

    .p.id           = AV_CODEC_ID_R10K,

    .init           = decode_init,

    FF_CODEC_DECODE_CB(decode_frame),

    .p.capabilities = AV_CODEC_CAP_DR1,

};

#endif

#if CONFIG_AVRP_DECODER

const FFCodec ff_avrp_decoder = {

    .p.name         = "avrp",

    CODEC_LONG_NAME("Avid 1:1 10-bit RGB Packer"),

    .p.type         = AVMEDIA_TYPE_VIDEO,

    .p.id           = AV_CODEC_ID_AVRP,

    .init           = decode_init,

    FF_CODEC_DECODE_CB(decode_frame),

    .p.capabilities = AV_CODEC_CAP_DR1,

};

#endif