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avuienc.c
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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 
27 {
28  avctx->coded_frame = av_frame_alloc();
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  }
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 
53  const AVFrame *pic, int *got_packet)
54 {
55  uint8_t *dst;
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;
75 
76  for (i = 0; i <= interlaced; i++) {
77  uint8_t *src;
78  if (interlaced && avctx->height == 486) {
79  src = pic->data[0] + (1 - i) * pic->linesize[0];
80  } else {
81  src = pic->data[0] + i * pic->linesize[0];
82  }
83  dst += avctx->width * skip + 4 * i;
84  for (j = 0; j < avctx->height; j += interlaced + 1) {
85  memcpy(dst, src, avctx->width * 2);
86  src += (interlaced + 1) * pic->linesize[0];
87  dst += avctx->width * 2;
88  }
89  }
90 
91  pkt->flags |= AV_PKT_FLAG_KEY;
92  *got_packet = 1;
93  return 0;
94 }
95 
97 {
98  av_freep(&avctx->coded_frame);
99 
100  return 0;
101 }
102 
104  .name = "avui",
105  .long_name = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
106  .type = AVMEDIA_TYPE_VIDEO,
107  .id = AV_CODEC_ID_AVUI,
108  .init = avui_encode_init,
109  .encode2 = avui_encode_frame,
110  .close = avui_encode_close,
111  .capabilities = CODEC_CAP_EXPERIMENTAL,
112  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },
113 };