/*
  * 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 "internal.h"
 
 static av_cold int avui_encode_init(AVCodecContext *avctx)
 {
     avctx->coded_frame = avcodec_alloc_frame();
 
     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->coded_frame) {
         av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
         return AVERROR(ENOMEM);
     }

     if (!(avctx->extradata = av_mallocz(24 + FF_INPUT_BUFFER_PADDING_SIZE)))
         return AVERROR(ENOMEM);
     avctx->extradata_size = 24;
     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;
     }
 

 
     return 0;
 }
 
 static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                              const AVFrame *pic, int *got_packet)
 {
     uint8_t *dst, *src = pic->data[0];

     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_alloc_packet2(avctx, pkt, size)) < 0)
         return ret;
     dst = pkt->data;

     if (!interlaced) {

         dst += avctx->width * skip;
     }
 
     avctx->coded_frame->reference = 0;
     avctx->coded_frame->key_frame = 1;
     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
 
     for (i = 0; i <= interlaced; i++) {
         if (interlaced && avctx->height == 486) {
             src = pic->data[0] + (1 - i) * pic->linesize[0];
         } else {
             src = pic->data[0] + i * pic->linesize[0];
         }
         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;
         }
     }
 
     pkt->flags |= AV_PKT_FLAG_KEY;
     *got_packet = 1;
     return 0;
 }
 
 static av_cold int avui_encode_close(AVCodecContext *avctx)
 {
     av_freep(&avctx->coded_frame);
 
     return 0;
 }
 
 AVCodec ff_avui_encoder = {
     .name         = "avui",
     .type         = AVMEDIA_TYPE_VIDEO,

     .id           = AV_CODEC_ID_AVUI,

     .init         = avui_encode_init,
     .encode2      = avui_encode_frame,
     .close        = avui_encode_close,

     .capabilities = CODEC_CAP_EXPERIMENTAL,

     .pix_fmts     = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },

     .long_name    = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
 };