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 "codec_internal.h"
25 #include "encode.h"
26 #include "libavutil/intreadwrite.h"
27
avui_encode_init(AVCodecContext * avctx)28 static av_cold int avui_encode_init(AVCodecContext *avctx)
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->extradata = av_mallocz(144 + AV_INPUT_BUFFER_PADDING_SIZE)))
35 return AVERROR(ENOMEM);
36 avctx->extradata_size = 144;
37 memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16);
38 if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
39 avctx->extradata[19] = 2;
40 } else {
41 avctx->extradata[19] = 1;
42 }
43 memcpy(avctx->extradata + 24, "\0\0\0\x78""ARESARES0001""\0\0\0\x98", 20);
44 AV_WB32(avctx->extradata + 44, avctx->width);
45 AV_WB32(avctx->extradata + 48, avctx->height);
46 memcpy(avctx->extradata + 52, "\0\0\0\x1\0\0\0\x20\0\0\0\x2", 12);
47
48
49 return 0;
50 }
51
avui_encode_frame(AVCodecContext * avctx,AVPacket * pkt,const AVFrame * pic,int * got_packet)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_get_encode_buffer(avctx, pkt, size, 0)) < 0)
67 return ret;
68 dst = pkt->data;
69 if (!interlaced) {
70 memset(dst, 0, avctx->width * skip);
71 dst += avctx->width * skip;
72 }
73
74 for (i = 0; i <= interlaced; i++) {
75 uint8_t *src;
76 if (interlaced && avctx->height == 486) {
77 src = pic->data[0] + (1 - i) * pic->linesize[0];
78 } else {
79 src = pic->data[0] + i * pic->linesize[0];
80 }
81 memset(dst, 0, avctx->width * skip + 4 * i);
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 *got_packet = 1;
91 return 0;
92 }
93
94 const FFCodec ff_avui_encoder = {
95 .p.name = "avui",
96 .p.long_name = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
97 .p.type = AVMEDIA_TYPE_VIDEO,
98 .p.id = AV_CODEC_ID_AVUI,
99 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_EXPERIMENTAL,
100 .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },
101 .init = avui_encode_init,
102 FF_CODEC_ENCODE_CB(avui_encode_frame),
103 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
104 };
105