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6147 serge 1 
/*
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 * AVID Meridien encoder
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 *
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 * Copyright (c) 2012 Carl Eugen Hoyos
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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 "internal.h"
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#include "libavutil/intreadwrite.h"
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static av_cold int avui_encode_init(AVCodecContext *avctx)
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{
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    if (avctx->width != 720 || avctx->height != 486 && avctx->height != 576) {
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        av_log(avctx, AV_LOG_ERROR, "Only 720x486 and 720x576 are supported.\n");
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        return AVERROR(EINVAL);
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    }
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    if (!(avctx->extradata = av_mallocz(144 + AV_INPUT_BUFFER_PADDING_SIZE)))
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        return AVERROR(ENOMEM);
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    avctx->extradata_size = 144;
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    memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16);
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    if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
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        avctx->extradata[19] = 2;
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    } else {
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        avctx->extradata[19] = 1;
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    }
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    memcpy(avctx->extradata + 24, "\0\0\0\x78""ARESARES0001""\0\0\0\x98", 20);
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    AV_WB32(avctx->extradata + 44, avctx->width);
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    AV_WB32(avctx->extradata + 48, avctx->height);
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    memcpy(avctx->extradata + 52, "\0\0\0\x1\0\0\0\x20\0\0\0\x2", 12);
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    return 0;
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}
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static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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                             const AVFrame *pic, int *got_packet)
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{
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    uint8_t *dst;
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    int i, j, skip, ret, size, interlaced;
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    interlaced = avctx->field_order > AV_FIELD_PROGRESSIVE;
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    if (avctx->height == 486) {
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        skip = 10;
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    } else {
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        skip = 16;
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    }
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    size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced;
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    if ((ret = ff_alloc_packet2(avctx, pkt, size, size)) < 0)
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        return ret;
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    dst = pkt->data;
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    if (!interlaced) {
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        memset(dst, 0, avctx->width * skip);
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        dst += avctx->width * skip;
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    }
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    for (i = 0; i <= interlaced; i++) {
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        uint8_t *src;
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        if (interlaced && avctx->height == 486) {
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            src = pic->data[0] + (1 - i) * pic->linesize[0];
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        } else {
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            src = pic->data[0] + i * pic->linesize[0];
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        }
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        memset(dst, 0, avctx->width * skip + 4 * i);
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        dst += avctx->width * skip + 4 * i;
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        for (j = 0; j < avctx->height; j += interlaced + 1) {
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            memcpy(dst, src, avctx->width * 2);
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            src += (interlaced + 1) * pic->linesize[0];
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            dst += avctx->width * 2;
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        }
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    }
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    pkt->flags |= AV_PKT_FLAG_KEY;
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    *got_packet = 1;
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    return 0;
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}
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AVCodec ff_avui_encoder = {
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    .name         = "avui",
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    .long_name    = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
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    .type         = AVMEDIA_TYPE_VIDEO,
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    .id           = AV_CODEC_ID_AVUI,
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    .init         = avui_encode_init,
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    .encode2      = avui_encode_frame,
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    .capabilities = AV_CODEC_CAP_EXPERIMENTAL | AV_CODEC_CAP_INTRA_ONLY,
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    .pix_fmts     = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },
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};