FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/fsb.c
Date: 2022-12-05 03:11:11
Exec Total Coverage
Lines: 3 125 2.4%
Functions: 1 3 33.3%
Branches: 1 70 1.4%

Line Branch Exec Source
1 /*
2 * FSB demuxer
3 * Copyright (c) 2015 Paul B Mahol
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avassert.h"
23 #include "libavutil/intreadwrite.h"
24 #include "avformat.h"
25 #include "avio.h"
26 #include "internal.h"
27
28 6782 static int fsb_probe(const AVProbeData *p)
29 {
30
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6782 if (memcmp(p->buf, "FSB", 3) || p->buf[3] - '0' < 1 || p->buf[3] - '0' > 5)
31 6782 return 0;
32 if (AV_RL32(p->buf + 4) != 1)
33 return 0;
34 return AVPROBE_SCORE_MAX;
35 }
36
37 static int fsb_read_header(AVFormatContext *s)
38 {
39 AVIOContext *pb = s->pb;
40 unsigned format, version, c;
41 int64_t offset;
42 AVCodecParameters *par;
43 AVStream *st = avformat_new_stream(s, NULL);
44 int ret;
45
46 avio_skip(pb, 3); // "FSB"
47 version = avio_r8(pb) - '0';
48 if (version != 4 && version != 3) {
49 avpriv_request_sample(s, "version %d", version);
50 return AVERROR_PATCHWELCOME;
51 }
52
53 avio_skip(pb, 4);
54
55 if (!st)
56 return AVERROR(ENOMEM);
57 par = st->codecpar;
58 par->codec_type = AVMEDIA_TYPE_AUDIO;
59 par->codec_tag = 0;
60
61 if (version == 3) {
62 offset = avio_rl32(pb) + 0x18;
63 avio_skip(pb, 44);
64 st->duration = avio_rl32(pb);
65 avio_skip(pb, 12);
66 format = avio_rl32(pb);
67 par->sample_rate = avio_rl32(pb);
68 if (par->sample_rate <= 0)
69 return AVERROR_INVALIDDATA;
70 avio_skip(pb, 6);
71 par->ch_layout.nb_channels = avio_rl16(pb);
72 if (!par->ch_layout.nb_channels)
73 return AVERROR_INVALIDDATA;
74
75 if (format & 0x00000100) {
76 par->codec_id = AV_CODEC_ID_PCM_S16LE;
77 par->block_align = 4096 * par->ch_layout.nb_channels;
78 } else if (format & 0x00400000) {
79 par->bits_per_coded_sample = 4;
80 par->codec_id = AV_CODEC_ID_ADPCM_IMA_WAV;
81 par->block_align = 36 * par->ch_layout.nb_channels;
82 } else if (format & 0x00800000) {
83 par->codec_id = AV_CODEC_ID_ADPCM_PSX;
84 par->block_align = 16 * par->ch_layout.nb_channels;
85 } else if (format & 0x02000000) {
86 par->codec_id = AV_CODEC_ID_ADPCM_THP;
87 par->block_align = 8 * par->ch_layout.nb_channels;
88 if (par->ch_layout.nb_channels > INT_MAX / 32)
89 return AVERROR_INVALIDDATA;
90 ret = ff_alloc_extradata(par, 32 * par->ch_layout.nb_channels);
91 if (ret < 0)
92 return ret;
93 avio_seek(pb, 0x68, SEEK_SET);
94 for (c = 0; c < par->ch_layout.nb_channels; c++) {
95 avio_read(pb, par->extradata + 32 * c, 32);
96 avio_skip(pb, 14);
97 }
98 } else {
99 avpriv_request_sample(s, "format 0x%X", format);
100 return AVERROR_PATCHWELCOME;
101 }
102 } else if (version == 4) {
103 offset = avio_rl32(pb) + 0x30;
104 avio_skip(pb, 80);
105 st->duration = avio_rl32(pb);
106
107 format = avio_rb32(pb);
108 switch(format) {
109 case 0x40001001:
110 case 0x00001005:
111 case 0x40001081:
112 case 0x40200001:
113 par->codec_id = AV_CODEC_ID_XMA2;
114 break;
115 case 0x40000802:
116 par->codec_id = AV_CODEC_ID_ADPCM_THP;
117 break;
118 default:
119 avpriv_request_sample(s, "format 0x%X", format);
120 return AVERROR_PATCHWELCOME;
121 }
122
123 par->sample_rate = avio_rl32(pb);
124 if (par->sample_rate <= 0)
125 return AVERROR_INVALIDDATA;
126 avio_skip(pb, 6);
127
128 par->ch_layout.nb_channels = avio_rl16(pb);
129 if (!par->ch_layout.nb_channels)
130 return AVERROR_INVALIDDATA;
131
132 switch (par->codec_id) {
133 case AV_CODEC_ID_XMA2:
134 ret = ff_alloc_extradata(par, 34);
135 if (ret < 0)
136 return ret;
137 memset(par->extradata, 0, 34);
138 par->block_align = 2048;
139 break;
140 case AV_CODEC_ID_ADPCM_THP:
141 if (par->ch_layout.nb_channels > INT_MAX / 32)
142 return AVERROR_INVALIDDATA;
143 ret = ff_alloc_extradata(par, 32 * par->ch_layout.nb_channels);
144 if (ret < 0)
145 return ret;
146 avio_seek(pb, 0x80, SEEK_SET);
147 for (c = 0; c < par->ch_layout.nb_channels; c++) {
148 avio_read(pb, par->extradata + 32 * c, 32);
149 avio_skip(pb, 14);
150 }
151 par->block_align = 8 * par->ch_layout.nb_channels;
152 break;
153 }
154 } else {
155 av_assert0(0);
156 }
157
158 avio_skip(pb, offset - avio_tell(pb));
159 ffformatcontext(s)->data_offset = avio_tell(pb);
160
161 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
162
163 return 0;
164 }
165
166 static int fsb_read_packet(AVFormatContext *s, AVPacket *pkt)
167 {
168 AVCodecParameters *par = s->streams[0]->codecpar;
169 int64_t pos;
170 int ret;
171
172 if (avio_feof(s->pb))
173 return AVERROR_EOF;
174
175 pos = avio_tell(s->pb);
176 if (par->codec_id == AV_CODEC_ID_ADPCM_THP &&
177 par->ch_layout.nb_channels > 1) {
178 int i, ch;
179
180 ret = av_new_packet(pkt, par->block_align);
181 if (ret < 0)
182 return ret;
183 for (i = 0; i < 4; i++) {
184 for (ch = 0; ch < par->ch_layout.nb_channels; ch++) {
185 pkt->data[ch * 8 + i * 2 + 0] = avio_r8(s->pb);
186 pkt->data[ch * 8 + i * 2 + 1] = avio_r8(s->pb);
187 }
188 }
189 ret = 0;
190 } else {
191 ret = av_get_packet(s->pb, pkt, par->block_align);
192 }
193
194 if (par->codec_id == AV_CODEC_ID_XMA2 && pkt->size >= 1)
195 pkt->duration = (pkt->data[0] >> 2) * 512;
196
197 pkt->pos = pos;
198 pkt->stream_index = 0;
199
200 return ret;
201 }
202
203 const AVInputFormat ff_fsb_demuxer = {
204 .name = "fsb",
205 .long_name = NULL_IF_CONFIG_SMALL("FMOD Sample Bank"),
206 .read_probe = fsb_probe,
207 .read_header = fsb_read_header,
208 .read_packet = fsb_read_packet,
209 .extensions = "fsb",
210 .flags = AVFMT_GENERIC_INDEX,
211 };
212