/*

 * Pinnacle TARGA CineWave YUV16 decoder

 * Copyright (c) 2012 Carl Eugen Hoyos

 *

 * 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 "decode.h"

static av_cold int y216_decode_init(AVCodecContext *avctx)

{

    avctx->pix_fmt             = AV_PIX_FMT_YUV422P16;

    avctx->bits_per_raw_sample = 14;

    return 0;

}

static int y216_decode_frame(AVCodecContext *avctx, AVFrame *pic,

                             int *got_frame, AVPacket *avpkt)

{

    const uint16_t *src = (uint16_t *)avpkt->data;

    uint16_t *y, *u, *v;

    int aligned_width = FFALIGN(avctx->width, 4);

    int i, j, ret;

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

        av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");

        return AVERROR(EINVAL);

    }

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

        return ret;

    y = (uint16_t *)pic->data[0];

    u = (uint16_t *)pic->data[1];

    v = (uint16_t *)pic->data[2];

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

        for (j = 0; j < avctx->width >> 1; j++) {

            u[    j    ] = src[4 * j    ] << 2 | src[4 * j    ] >> 14;

            y[2 * j    ] = src[4 * j + 1] << 2 | src[4 * j + 1] >> 14;

            v[    j    ] = src[4 * j + 2] << 2 | src[4 * j + 2] >> 14;

            y[2 * j + 1] = src[4 * j + 3] << 2 | src[4 * j + 3] >> 14;

        }

        y += pic->linesize[0] >> 1;

        u += pic->linesize[1] >> 1;

        v += pic->linesize[2] >> 1;

        src += aligned_width << 1;

    }

    *got_frame = 1;

    return avpkt->size;

}

const FFCodec ff_targa_y216_decoder = {

    .p.name       = "targa_y216",

    CODEC_LONG_NAME("Pinnacle TARGA CineWave YUV16"),

    .p.type       = AVMEDIA_TYPE_VIDEO,

    .p.id         = AV_CODEC_ID_TARGA_Y216,

    .init         = y216_decode_init,

    FF_CODEC_DECODE_CB(y216_decode_frame),

    .p.capabilities = AV_CODEC_CAP_DR1,

};