GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/avuidec.c Lines: 51 63 81.0 %
Date: 2019-11-18 18:00:01 Branches: 16 34 47.1 %

Line Branch Exec Source
1
/*
2
 * AVID Meridien decoder
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
#include "libavutil/intreadwrite.h"
26
27
6
static av_cold int avui_decode_init(AVCodecContext *avctx)
28
{
29
6
    avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
30
6
    return 0;
31
}
32
33
150
static int avui_decode_frame(AVCodecContext *avctx, void *data,
34
                             int *got_frame, AVPacket *avpkt)
35
{
36
    int ret;
37
150
    AVFrame *pic = data;
38
150
    const uint8_t *src = avpkt->data, *extradata = avctx->extradata;
39
    const uint8_t *srca;
40
    uint8_t *y, *u, *v, *a;
41
150
    int transparent, interlaced = 1, skip, opaque_length, i, j, k;
42
150
    uint32_t extradata_size = avctx->extradata_size;
43
44
150
    while (extradata_size >= 24) {
45
150
        uint32_t atom_size = AV_RB32(extradata);
46
150
        if (!memcmp(&extradata[4], "APRGAPRG0001", 12)) {
47
150
            interlaced = extradata[19] != 1;
48
150
            break;
49
        }
50
        if (atom_size && atom_size <= extradata_size) {
51
            extradata      += atom_size;
52
            extradata_size -= atom_size;
53
        } else {
54
            break;
55
        }
56
    }
57
150
    if (avctx->height == 486) {
58
        skip = 10;
59
    } else {
60
150
        skip = 16;
61
    }
62
150
    opaque_length = 2 * avctx->width * (avctx->height + skip) + 4 * interlaced;
63
150
    if (avpkt->size < opaque_length) {
64
        av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
65
        return AVERROR(EINVAL);
66
    }
67
150
    transparent = avctx->bits_per_coded_sample == 32 &&
68
                  avpkt->size >= opaque_length * 2 + 4;
69
150
    srca = src + opaque_length + 5;
70
71
150
    if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
72
        return ret;
73
74
150
    pic->key_frame = 1;
75
150
    pic->pict_type = AV_PICTURE_TYPE_I;
76
77
150
    if (!interlaced) {
78
150
        src  += avctx->width * skip;
79
150
        srca += avctx->width * skip;
80
    }
81
82
300
    for (i = 0; i < interlaced + 1; i++) {
83
150
        src  += avctx->width * skip;
84
150
        srca += avctx->width * skip;
85

150
        if (interlaced && avctx->height == 486) {
86
            y = pic->data[0] + (1 - i) * pic->linesize[0];
87
            u = pic->data[1] + (1 - i) * pic->linesize[1];
88
            v = pic->data[2] + (1 - i) * pic->linesize[2];
89
            a = pic->data[3] + (1 - i) * pic->linesize[3];
90
        } else {
91
150
            y = pic->data[0] + i * pic->linesize[0];
92
150
            u = pic->data[1] + i * pic->linesize[1];
93
150
            v = pic->data[2] + i * pic->linesize[2];
94
150
            a = pic->data[3] + i * pic->linesize[3];
95
        }
96
97
86550
        for (j = 0; j < avctx->height >> interlaced; j++) {
98
31190400
            for (k = 0; k < avctx->width >> 1; k++) {
99
31104000
                u[    k    ] = *src++;
100
31104000
                y[2 * k    ] = *src++;
101
31104000
                a[2 * k    ] = 0xFF - (transparent ? *srca++ : 0);
102
31104000
                srca++;
103
31104000
                v[    k    ] = *src++;
104
31104000
                y[2 * k + 1] = *src++;
105
31104000
                a[2 * k + 1] = 0xFF - (transparent ? *srca++ : 0);
106
31104000
                srca++;
107
            }
108
109
86400
            y += (interlaced + 1) * pic->linesize[0];
110
86400
            u += (interlaced + 1) * pic->linesize[1];
111
86400
            v += (interlaced + 1) * pic->linesize[2];
112
86400
            a += (interlaced + 1) * pic->linesize[3];
113
        }
114
150
        src  += 4;
115
150
        srca += 4;
116
    }
117
150
    *got_frame       = 1;
118
119
150
    return avpkt->size;
120
}
121
122
AVCodec ff_avui_decoder = {
123
    .name         = "avui",
124
    .long_name    = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
125
    .type         = AVMEDIA_TYPE_VIDEO,
126
    .id           = AV_CODEC_ID_AVUI,
127
    .init         = avui_decode_init,
128
    .decode       = avui_decode_frame,
129
    .capabilities = AV_CODEC_CAP_DR1,
130
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
131
};