FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/avuidec.c
Date: 2021-09-26 18:22:30
Exec Total Coverage
Lines: 51 63 81.0%
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
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150 while (extradata_size >= 24) {
45 150 uint32_t atom_size = AV_RB32(extradata);
46
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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
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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
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150 if (avpkt->size < opaque_length) {
64 av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
65 return AVERROR(EINVAL);
66 }
67
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150 transparent = avctx->bits_per_coded_sample == 32 &&
68 avpkt->size >= opaque_length * 2 + 4;
69 150 srca = src + opaque_length + 5;
70
71
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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
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150 if (!interlaced) {
78 150 src += avctx->width * skip;
79 150 srca += avctx->width * skip;
80 }
81
82
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300 for (i = 0; i < interlaced + 1; i++) {
83 150 src += avctx->width * skip;
84 150 srca += avctx->width * skip;
85
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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
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86550 for (j = 0; j < avctx->height >> interlaced; j++) {
98
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31190400 for (k = 0; k < avctx->width >> 1; k++) {
99 31104000 u[ k ] = *src++;
100 31104000 y[2 * k ] = *src++;
101
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31104000 a[2 * k ] = 0xFF - (transparent ? *srca++ : 0);
102 31104000 srca++;
103 31104000 v[ k ] = *src++;
104 31104000 y[2 * k + 1] = *src++;
105
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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 const 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 };
132