Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / avuienc.c
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 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 }
32 if (!(avctx->extradata = av_mallocz(24 + FF_INPUT_BUFFER_PADDING_SIZE)))
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
51 static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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;
73 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
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
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 };