FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/adxdec.c
Date: 2026-04-24 10:13:59
Exec Total Coverage
Lines: 53 74 71.6%
Functions: 3 3 100.0%
Branches: 20 35 57.1%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2011 Justin Ruggles
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file
23 * CRI ADX demuxer
24 */
25
26 #include "libavutil/intreadwrite.h"
27 #include "avformat.h"
28 #include "demux.h"
29 #include "internal.h"
30 #include "rawdec.h"
31
32 #define BLOCK_SIZE 18
33 #define BLOCK_SAMPLES 32
34
35 typedef struct ADXDemuxerContext {
36 FFRawDemuxerContext rawctx;
37 int header_size;
38 } ADXDemuxerContext;
39
40 7474 static int adx_probe(const AVProbeData *p)
41 {
42 int offset;
43
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 7474 if (AV_RB16(p->buf) != 0x8000)
44 7473 return 0;
45 1 offset = AV_RB16(&p->buf[2]);
46
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 1 if ( offset < 8
47
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 1 || offset > p->buf_size - 4
48
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 1 || memcmp(p->buf + offset - 2, "(c)CRI", 6))
49 ✗ return 0;
50 1 return AVPROBE_SCORE_MAX * 3 / 4;
51 }
52
53 66 static int adx_read_packet(AVFormatContext *s, AVPacket *pkt)
54 {
55 66 ADXDemuxerContext *c = s->priv_data;
56 66 AVCodecParameters *par = s->streams[0]->codecpar;
57 int ret, size;
58
59
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 66 if (par->codec_id == AV_CODEC_ID_AHX)
60 ✗ return ff_raw_read_partial_packet(s, pkt);
61
62
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 66 if (avio_feof(s->pb))
63 1 return AVERROR_EOF;
64
65 65 size = BLOCK_SIZE * par->ch_layout.nb_channels;
66
67 65 pkt->pos = avio_tell(s->pb);
68 65 pkt->stream_index = 0;
69
70 65 ret = av_get_packet(s->pb, pkt, size * 128);
71
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 65 if (ret < 0)
72 ✗ return ret;
73
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 65 if ((ret % size) && ret >= size) {
74 1 size = ret - (ret % size);
75 1 av_shrink_packet(pkt, size);
76 1 pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
77
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 64 } else if (ret < size) {
78 ✗ return AVERROR_INVALIDDATA;
79 } else {
80 64 size = ret;
81 }
82
83 65 pkt->duration = size / (BLOCK_SIZE * par->ch_layout.nb_channels);
84 65 pkt->pts = (pkt->pos - c->header_size) / (BLOCK_SIZE * par->ch_layout.nb_channels);
85
86 65 return 0;
87 }
88
89 1 static int adx_read_header(AVFormatContext *s)
90 {
91 1 ADXDemuxerContext *c = s->priv_data;
92 AVCodecParameters *par;
93 FFStream *sti;
94 int ret;
95 int channels;
96
97 1 AVStream *st = avformat_new_stream(s, NULL);
98
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 1 if (!st)
99 ✗ return AVERROR(ENOMEM);
100 1 par = s->streams[0]->codecpar;
101
102
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 1 if (avio_rb16(s->pb) != 0x8000)
103 ✗ return AVERROR_INVALIDDATA;
104 1 c->header_size = avio_rb16(s->pb) + 4;
105 1 avio_seek(s->pb, -4, SEEK_CUR);
106
107
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 1 if ((ret = ff_get_extradata(s, par, s->pb, c->header_size)) < 0)
108 ✗ return ret;
109
110
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 1 if (par->extradata_size < 12) {
111 ✗ av_log(s, AV_LOG_ERROR, "Invalid extradata size.\n");
112 ✗ return AVERROR_INVALIDDATA;
113 }
114 1 channels = AV_RB8 (par->extradata + 7);
115 1 par->sample_rate = AV_RB32(par->extradata + 8);
116
117
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 1 if (channels <= 0) {
118 ✗ av_log(s, AV_LOG_ERROR, "invalid number of channels %d\n", channels);
119 ✗ return AVERROR_INVALIDDATA;
120 }
121
122
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 1 if (par->sample_rate <= 0) {
123 ✗ av_log(s, AV_LOG_ERROR, "Invalid sample rate %d\n", par->sample_rate);
124 ✗ return AVERROR_INVALIDDATA;
125 }
126
127 1 sti = ffstream(st);
128 1 par->ch_layout.nb_channels = channels;
129 1 par->codec_type = AVMEDIA_TYPE_AUDIO;
130
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 1 switch (par->extradata[4]) {
131 1 case 3:
132 1 sti->need_parsing = AVSTREAM_PARSE_FULL_RAW;
133 1 par->codec_id = AV_CODEC_ID_ADPCM_ADX;
134 1 par->bit_rate = (int64_t)par->sample_rate * par->ch_layout.nb_channels * BLOCK_SIZE * 8LL / BLOCK_SAMPLES;
135 1 avpriv_set_pts_info(st, 64, BLOCK_SAMPLES, par->sample_rate);
136 1 break;
137 ✗ case 16:
138 ✗ sti->need_parsing = AVSTREAM_PARSE_FULL_RAW;
139 ✗ par->codec_id = AV_CODEC_ID_AHX;
140 ✗ avpriv_set_pts_info(st, 64, 1, par->sample_rate);
141 ✗ break;
142 ✗ default:
143 ✗ av_log(s, AV_LOG_ERROR, "Unsupported format: %d\n", par->extradata[4]);
144 ✗ return AVERROR_INVALIDDATA;
145 }
146
147 1 return 0;
148 }
149
150 const FFInputFormat ff_adx_demuxer = {
151 .p.name = "adx",
152 .p.long_name = NULL_IF_CONFIG_SMALL("CRI ADX"),
153 .p.extensions = "adx",
154 .p.priv_class = &ff_raw_demuxer_class,
155 .p.flags = AVFMT_GENERIC_INDEX,
156 .read_probe = adx_probe,
157 .priv_data_size = sizeof(ADXDemuxerContext),
158 .read_header = adx_read_header,
159 .read_packet = adx_read_packet,
160 };
161