Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Last modification | View Log | RSS feed

  1. /*
  2.  * AVID Meridien encoder
  3.  *
  4.  * Copyright (c) 2012 Carl Eugen Hoyos
  5.  *
  6.  * This file is part of FFmpeg.
  7.  *
  8.  * FFmpeg is free software; you can redistribute it and/or
  9.  * modify it under the terms of the GNU Lesser General Public
  10.  * License as published by the Free Software Foundation; either
  11.  * version 2.1 of the License, or (at your option) any later version.
  12.  *
  13.  * FFmpeg is distributed in the hope that it will be useful,
  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16.  * Lesser General Public License for more details.
  17.  *
  18.  * You should have received a copy of the GNU Lesser General Public
  19.  * License along with FFmpeg; if not, write to the Free Software
  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21.  */
  22.  
  23. #include "avcodec.h"
  24. #include "internal.h"
  25.  
  26. static av_cold int avui_encode_init(AVCodecContext *avctx)
  27. {
  28.     avctx->coded_frame = avcodec_alloc_frame();
  29.  
  30.     if (avctx->width != 720 || avctx->height != 486 && avctx->height != 576) {
  31.         av_log(avctx, AV_LOG_ERROR, "Only 720x486 and 720x576 are supported.\n");
  32.         return AVERROR(EINVAL);
  33.     }
  34.     if (!avctx->coded_frame) {
  35.         av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
  36.         return AVERROR(ENOMEM);
  37.     }
  38.     if (!(avctx->extradata = av_mallocz(24 + FF_INPUT_BUFFER_PADDING_SIZE)))
  39.         return AVERROR(ENOMEM);
  40.     avctx->extradata_size = 24;
  41.     memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16);
  42.     if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
  43.         avctx->extradata[19] = 2;
  44.     } else {
  45.         avctx->extradata[19] = 1;
  46.     }
  47.  
  48.  
  49.     return 0;
  50. }
  51.  
  52. static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
  53.                              const AVFrame *pic, int *got_packet)
  54. {
  55.     uint8_t *dst, *src = pic->data[0];
  56.     int i, j, skip, ret, size, interlaced;
  57.  
  58.     interlaced = avctx->field_order > AV_FIELD_PROGRESSIVE;
  59.  
  60.     if (avctx->height == 486) {
  61.         skip = 10;
  62.     } else {
  63.         skip = 16;
  64.     }
  65.     size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced;
  66.     if ((ret = ff_alloc_packet2(avctx, pkt, size)) < 0)
  67.         return ret;
  68.     dst = pkt->data;
  69.     if (!interlaced) {
  70.         dst += avctx->width * skip;
  71.     }
  72.  
  73.     avctx->coded_frame->key_frame = 1;
  74.     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
  75.  
  76.     for (i = 0; i <= interlaced; i++) {
  77.         if (interlaced && avctx->height == 486) {
  78.             src = pic->data[0] + (1 - i) * pic->linesize[0];
  79.         } else {
  80.             src = pic->data[0] + i * pic->linesize[0];
  81.         }
  82.         dst += avctx->width * skip + 4 * i;
  83.         for (j = 0; j < avctx->height; j += interlaced + 1) {
  84.             memcpy(dst, src, avctx->width * 2);
  85.             src += (interlaced + 1) * pic->linesize[0];
  86.             dst += avctx->width * 2;
  87.         }
  88.     }
  89.  
  90.     pkt->flags |= AV_PKT_FLAG_KEY;
  91.     *got_packet = 1;
  92.     return 0;
  93. }
  94.  
  95. static av_cold int avui_encode_close(AVCodecContext *avctx)
  96. {
  97.     av_freep(&avctx->coded_frame);
  98.  
  99.     return 0;
  100. }
  101.  
  102. AVCodec ff_avui_encoder = {
  103.     .name         = "avui",
  104.     .long_name    = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
  105.     .type         = AVMEDIA_TYPE_VIDEO,
  106.     .id           = AV_CODEC_ID_AVUI,
  107.     .init         = avui_encode_init,
  108.     .encode2      = avui_encode_frame,
  109.     .close        = avui_encode_close,
  110.     .capabilities = CODEC_CAP_EXPERIMENTAL,
  111.     .pix_fmts     = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },
  112. };
  113.