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
26static 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
52static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
53                             const AVFrame *pic, int *got_packet)
54{
55    uint8_t *dst, *src = pic->data[0];
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        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
95static av_cold int avui_encode_close(AVCodecContext *avctx)
96{
97    av_freep(&avctx->coded_frame);
98
99    return 0;
100}
101
102AVCodec 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};
113