/*

 * AVID Meridien encoder

 *

 * 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 "encode.h"

#include "libavutil/intreadwrite.h"

#include "libavutil/mem.h"

static av_cold int avui_encode_init(AVCodecContext *avctx)

{

    if (avctx->width != 720 || avctx->height != 486 && avctx->height != 576) {

        av_log(avctx, AV_LOG_ERROR, "Only 720x486 and 720x576 are supported.\n");

        return AVERROR(EINVAL);

    }

    if (!(avctx->extradata = av_mallocz(144 + AV_INPUT_BUFFER_PADDING_SIZE)))

        return AVERROR(ENOMEM);

    avctx->extradata_size = 144;

    memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16);

    if (avctx->field_order > AV_FIELD_PROGRESSIVE) {

        avctx->extradata[19] = 2;

    } else {

        avctx->extradata[19] = 1;

    }

    memcpy(avctx->extradata + 24, "\0\0\0\x78""ARESARES0001""\0\0\0\x98", 20);

    AV_WB32(avctx->extradata + 44, avctx->width);

    AV_WB32(avctx->extradata + 48, avctx->height);

    memcpy(avctx->extradata + 52, "\0\0\0\x1\0\0\0\x20\0\0\0\x2", 12);

    return 0;

}

static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt,

                             const AVFrame *pic, int *got_packet)

{

    uint8_t *dst;

    int i, j, skip, ret, size, interlaced;

    interlaced = avctx->field_order > AV_FIELD_PROGRESSIVE;

    if (avctx->height == 486) {

        skip = 10;

    } else {

        skip = 16;

    }

    size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced;

    if ((ret = ff_get_encode_buffer(avctx, pkt, size, 0)) < 0)

        return ret;

    dst = pkt->data;

    if (!interlaced) {

        memset(dst, 0, avctx->width * skip);

        dst += avctx->width * skip;

    }

    for (i = 0; i <= interlaced; i++) {

        const uint8_t *src;

        if (interlaced && avctx->height == 486) {

            src = pic->data[0] + (1 - i) * pic->linesize[0];

        } else {

            src = pic->data[0] + i * pic->linesize[0];

        }

        memset(dst, 0, avctx->width * skip + 4 * i);

        dst += avctx->width * skip + 4 * i;

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

            memcpy(dst, src, avctx->width * 2);

            src += (interlaced + 1) * pic->linesize[0];

            dst += avctx->width * 2;

        }

    }

    *got_packet = 1;

    return 0;

}

const FFCodec ff_avui_encoder = {

    .p.name         = "avui",

    CODEC_LONG_NAME("Avid Meridien Uncompressed"),

    .p.type         = AVMEDIA_TYPE_VIDEO,

    .p.id           = AV_CODEC_ID_AVUI,

    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_EXPERIMENTAL |

                      AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,

    CODEC_PIXFMTS(AV_PIX_FMT_UYVY422),

    .color_ranges   = AVCOL_RANGE_MPEG,

    .init         = avui_encode_init,

    FF_CODEC_ENCODE_CB(avui_encode_frame),

};