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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  if (avctx->width != 720 || avctx->height != 486 && avctx->height != 576) {
29  av_log(avctx, AV_LOG_ERROR, "Only 720x486 and 720x576 are supported.\n");
30  return AVERROR(EINVAL);
31  }
33  return AVERROR(ENOMEM);
34  avctx->extradata_size = 24;
35  memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16);
36  if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
37  avctx->extradata[19] = 2;
38  } else {
39  avctx->extradata[19] = 1;
40  }
41 
42  avctx->coded_frame = av_frame_alloc();
43  if (!avctx->coded_frame) {
44  av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
45  return AVERROR(ENOMEM);
46  }
47 
48  return 0;
49 }
50 
52  const AVFrame *pic, int *got_packet)
53 {
54  uint8_t *dst;
55  int i, j, skip, ret, size, interlaced;
56 
57  interlaced = avctx->field_order > AV_FIELD_PROGRESSIVE;
58 
59  if (avctx->height == 486) {
60  skip = 10;
61  } else {
62  skip = 16;
63  }
64  size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced;
65  if ((ret = ff_alloc_packet2(avctx, pkt, size)) < 0)
66  return ret;
67  dst = pkt->data;
68  if (!interlaced) {
69  dst += avctx->width * skip;
70  }
71 
72  avctx->coded_frame->key_frame = 1;
74 
75  for (i = 0; i <= interlaced; i++) {
76  uint8_t *src;
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 
96 {
97  av_freep(&avctx->coded_frame);
98 
99  return 0;
100 }
101 
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 };