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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 | ||
26 | static av_cold int avui_encode_init(AVCodecContext *avctx) | |
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 | } | |
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; | |
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 | 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 | ||
96 | static av_cold int avui_encode_close(AVCodecContext *avctx) | |
97 | { | |
98 | av_freep(&avctx->coded_frame); | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | AVCodec ff_avui_encoder = { | |
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 | }; |