FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/tta.c
Date: 2025-11-01 17:46:10
Exec Total Coverage
Lines: 70 100 70.0%
Functions: 3 4 75.0%
Branches: 31 60 51.7%
Line Branch Exec Source
1 /*
2 * TTA demuxer
3 * Copyright (c) 2006 Alex Beregszaszi
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/crc.h"
23 #include "libavutil/dict.h"
24 #include "libavutil/intreadwrite.h"
25
26 #include "apetag.h"
27 #include "avformat.h"
28 #include "avio_internal.h"
29 #include "demux.h"
30 #include "internal.h"
31 #include "id3v1.h"
32
33 typedef struct TTAContext {
34 int totalframes, currentframe;
35 int frame_size;
36 int last_frame_size;
37 } TTAContext;
38
39 7282 static int tta_probe(const AVProbeData *p)
40 {
41
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 7282 if (AV_RL32(&p->buf[0]) == MKTAG('T', 'T', 'A', '1') &&
42
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 5 (AV_RL16(&p->buf[4]) == 1 || AV_RL16(&p->buf[4]) == 2) &&
43
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 5 AV_RL16(&p->buf[6]) > 0 &&
44
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 5 AV_RL16(&p->buf[8]) > 0 &&
45
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 5 AV_RL32(&p->buf[10]) > 0)
46 5 return AVPROBE_SCORE_EXTENSION + 30;
47 7277 return 0;
48 }
49
50 5 static int tta_read_header(AVFormatContext *s)
51 {
52 5 TTAContext *c = s->priv_data;
53 AVStream *st;
54 int64_t framepos;
55 uint8_t header[22];
56
57 5 ff_id3v1_read(s);
58
59 5 int ret = ffio_read_size(s->pb, header, sizeof(header));
60
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 5 if (ret < 0)
61 ✗ return ret;
62
63
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 5 if (AV_RL32(header) != MKTAG('T', 'T', 'A', '1'))
64 ✗ return AVERROR_INVALIDDATA;
65
66 5 int channels = AV_RL16(header + 6);
67 5 int bps = AV_RL16(header + 8);
68 5 int samplerate = AV_RL32(header + 10);
69
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 5 if(samplerate <= 0 || samplerate > 1000000){
70 ✗ av_log(s, AV_LOG_ERROR, "nonsense samplerate\n");
71 ✗ return AVERROR_INVALIDDATA;
72 }
73
74 5 uint32_t nb_samples = AV_RL32(header + 14);
75
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 5 if (!nb_samples) {
76 ✗ av_log(s, AV_LOG_ERROR, "invalid number of samples\n");
77 ✗ return AVERROR_INVALIDDATA;
78 }
79
80 5 uint32_t crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, header, 18) ^ UINT32_MAX;
81
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 5 if (crc != AV_RL32(header + 18) && s->error_recognition & AV_EF_CRCCHECK) {
82 ✗ av_log(s, AV_LOG_ERROR, "Header CRC error\n");
83 ✗ return AVERROR_INVALIDDATA;
84 }
85
86 5 c->frame_size = samplerate * 256 / 245;
87 5 c->last_frame_size = nb_samples % c->frame_size;
88
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 5 if (!c->last_frame_size)
89 ✗ c->last_frame_size = c->frame_size;
90 5 c->totalframes = nb_samples / c->frame_size + (c->last_frame_size < c->frame_size);
91 5 c->currentframe = 0;
92
93
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 5 if(c->totalframes >= (INT_MAX - 4)/sizeof(uint32_t) || c->totalframes <= 0){
94 ✗ av_log(s, AV_LOG_ERROR, "totalframes %d invalid\n", c->totalframes);
95 ✗ return AVERROR_INVALIDDATA;
96 }
97
98 5 st = avformat_new_stream(s, NULL);
99
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 5 if (!st)
100 ✗ return AVERROR(ENOMEM);
101
102 5 avpriv_set_pts_info(st, 64, 1, samplerate);
103 5 st->start_time = 0;
104 5 st->duration = nb_samples;
105
106 5 ret = ff_alloc_extradata(st->codecpar, sizeof(header));
107
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 5 if (ret < 0)
108 ✗ return ret;
109 5 memcpy(st->codecpar->extradata, header, sizeof(header));
110
111 5 framepos = avio_tell(s->pb);
112
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 5 if (framepos < 0)
113 ✗ return framepos;
114 5 framepos += 4 * c->totalframes + 4;
115
116 5 ffio_init_checksum(s->pb, ff_crcEDB88320_update, UINT32_MAX);
117
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 44 for (int i = 0; i < c->totalframes; i++) {
118 39 uint32_t size = avio_rl32(s->pb);
119 int r;
120
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 39 if (avio_feof(s->pb))
121 ✗ return AVERROR_INVALIDDATA;
122
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 39 if ((r = av_add_index_entry(st, framepos, i * (int64_t)c->frame_size, size, 0,
123 AVINDEX_KEYFRAME)) < 0)
124 ✗ return r;
125 39 framepos += size;
126 }
127 5 crc = ffio_get_checksum(s->pb) ^ UINT32_MAX;
128
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 5 if (crc != avio_rl32(s->pb) && s->error_recognition & AV_EF_CRCCHECK) {
129 ✗ av_log(s, AV_LOG_ERROR, "Seek table CRC error\n");
130 ✗ return AVERROR_INVALIDDATA;
131 }
132
133 5 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
134 5 st->codecpar->codec_id = AV_CODEC_ID_TTA;
135 5 st->codecpar->ch_layout.nb_channels = channels;
136 5 st->codecpar->sample_rate = samplerate;
137 5 st->codecpar->bits_per_coded_sample = bps;
138
139
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 5 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
140 5 int64_t pos = avio_tell(s->pb);
141 5 ff_ape_parse_tag(s);
142 5 avio_seek(s->pb, pos, SEEK_SET);
143 }
144
145 5 return 0;
146 }
147
148 44 static int tta_read_packet(AVFormatContext *s, AVPacket *pkt)
149 {
150 44 TTAContext *c = s->priv_data;
151 44 AVStream *st = s->streams[0];
152 44 FFStream *const sti = ffstream(st);
153 int size, ret;
154
155 // FIXME!
156
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 44 if (c->currentframe >= c->totalframes)
157 5 return AVERROR_EOF;
158
159
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 39 if (sti->nb_index_entries < c->totalframes) {
160 ✗ av_log(s, AV_LOG_ERROR, "Index entry disappeared\n");
161 ✗ return AVERROR_INVALIDDATA;
162 }
163
164 39 size = sti->index_entries[c->currentframe].size;
165
166 39 ret = av_get_packet(s->pb, pkt, size);
167 39 pkt->dts = sti->index_entries[c->currentframe++].timestamp;
168
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 39 pkt->duration = c->currentframe == c->totalframes ? c->last_frame_size :
169 34 c->frame_size;
170 39 return ret;
171 }
172
173 ✗ static int tta_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
174 {
175 ✗ TTAContext *c = s->priv_data;
176 ✗ AVStream *st = s->streams[stream_index];
177 ✗ int index = av_index_search_timestamp(st, timestamp, flags);
178 ✗ if (index < 0)
179 ✗ return -1;
180 ✗ if (avio_seek(s->pb, ffstream(st)->index_entries[index].pos, SEEK_SET) < 0)
181 ✗ return -1;
182
183 ✗ c->currentframe = index;
184
185 ✗ return 0;
186 }
187
188 const FFInputFormat ff_tta_demuxer = {
189 .p.name = "tta",
190 .p.long_name = NULL_IF_CONFIG_SMALL("TTA (True Audio)"),
191 .p.extensions = "tta",
192 .priv_data_size = sizeof(TTAContext),
193 .flags_internal = FF_INFMT_FLAG_ID3V2_AUTO,
194 .read_probe = tta_probe,
195 .read_header = tta_read_header,
196 .read_packet = tta_read_packet,
197 .read_seek = tta_read_seek,
198 };
199