FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/qcp.c
Date: 2025-04-25 22:50:00
Exec Total Coverage
Lines: 64 84 76.2%
Functions: 4 4 100.0%
Branches: 29 51 56.9%
Line Branch Exec Source
1 /*
2 * QCP format (.qcp) demuxer
3 * Copyright (c) 2009 Kenan Gillet
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 /**
23 * @file
24 * QCP format (.qcp) demuxer
25 * @author Kenan Gillet
26 * @see RFC 3625: "The QCP File Format and Media Types for Speech Data"
27 * http://tools.ietf.org/html/rfc3625
28 */
29
30 #include "libavutil/channel_layout.h"
31 #include "libavutil/intreadwrite.h"
32 #include "avformat.h"
33 #include "avio_internal.h"
34 #include "demux.h"
35 #include "riff.h"
36
37 typedef struct QCPContext {
38 uint32_t data_size; ///< size of data chunk
39
40 #define QCP_MAX_MODE 4
41 int16_t rates_per_mode[QCP_MAX_MODE+1]; ///< contains the packet size corresponding
42 ///< to each mode, -1 if no size.
43 } QCPContext;
44
45 /**
46 * Last 15 out of 16 bytes of QCELP-13K GUID, as stored in the file;
47 * the first byte of the GUID can be either 0x41 or 0x42.
48 */
49 static const uint8_t guid_qcelp_13k_part[15] = {
50 0x6d, 0x7f, 0x5e, 0x15, 0xb1, 0xd0, 0x11, 0xba,
51 0x91, 0x00, 0x80, 0x5f, 0xb4, 0xb9, 0x7e
52 };
53
54 /**
55 * EVRC GUID as stored in the file
56 */
57 static const uint8_t guid_evrc[16] = {
58 0x8d, 0xd4, 0x89, 0xe6, 0x76, 0x90, 0xb5, 0x46,
59 0x91, 0xef, 0x73, 0x6a, 0x51, 0x00, 0xce, 0xb4
60 };
61
62 static const uint8_t guid_4gv[16] = {
63 0xca, 0x29, 0xfd, 0x3c, 0x53, 0xf6, 0xf5, 0x4e,
64 0x90, 0xe9, 0xf4, 0x23, 0x6d, 0x59, 0x9b, 0x61
65 };
66
67 /**
68 * SMV GUID as stored in the file
69 */
70 static const uint8_t guid_smv[16] = {
71 0x75, 0x2b, 0x7c, 0x8d, 0x97, 0xa7, 0x49, 0xed,
72 0x98, 0x5e, 0xd5, 0x3c, 0x8c, 0xc7, 0x5f, 0x84
73 };
74
75 /**
76 * @param guid contains at least 16 bytes
77 * @return 1 if the guid is a qcelp_13k guid, 0 otherwise
78 */
79 2 static int is_qcelp_13k_guid(const uint8_t *guid) {
80 ✗ return (guid[0] == 0x41 || guid[0] == 0x42)
81
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 2 && !memcmp(guid+1, guid_qcelp_13k_part, sizeof(guid_qcelp_13k_part));
82 }
83
84 7211 static int qcp_probe(const AVProbeData *pd)
85 {
86
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 7211 if (AV_RL32(pd->buf ) == AV_RL32("RIFF") &&
87
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 964 AV_RL64(pd->buf+8) == AV_RL64("QLCMfmt "))
88 2 return AVPROBE_SCORE_MAX;
89 7209 return 0;
90 }
91
92 2 static int qcp_read_header(AVFormatContext *s)
93 {
94 2 AVIOContext *pb = s->pb;
95 2 QCPContext *c = s->priv_data;
96 2 AVStream *st = avformat_new_stream(s, NULL);
97 uint8_t buf[16];
98 int ret;
99 int i;
100 unsigned nb_rates;
101
102
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 2 if (!st)
103 ✗ return AVERROR(ENOMEM);
104
105 2 avio_rb32(pb); // "RIFF"
106 2 avio_skip(pb, 4 + 8 + 4 + 1 + 1); // filesize + "QLCMfmt " + chunk-size + major-version + minor-version
107
108 2 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
109 2 st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
110 2 ret = ffio_read_size(pb, buf, 16);
111
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 2 if (ret < 0)
112 ✗ return ret;
113
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 2 if (is_qcelp_13k_guid(buf)) {
114 2 st->codecpar->codec_id = AV_CODEC_ID_QCELP;
115 ✗ } else if (!memcmp(buf, guid_evrc, 16)) {
116 ✗ st->codecpar->codec_id = AV_CODEC_ID_EVRC;
117 ✗ } else if (!memcmp(buf, guid_smv, 16)) {
118 ✗ st->codecpar->codec_id = AV_CODEC_ID_SMV;
119 ✗ } else if (!memcmp(buf, guid_4gv, 16)) {
120 ✗ st->codecpar->codec_id = AV_CODEC_ID_4GV;
121 } else {
122 ✗ av_log(s, AV_LOG_ERROR, "Unknown codec GUID "FF_PRI_GUID".\n",
123 ✗ FF_ARG_GUID(buf));
124 ✗ return AVERROR_INVALIDDATA;
125 }
126 2 avio_skip(pb, 2 + 80); // codec-version + codec-name
127 2 st->codecpar->bit_rate = avio_rl16(pb);
128
129 2 s->packet_size = avio_rl16(pb);
130 2 avio_skip(pb, 2); // block-size
131 2 st->codecpar->sample_rate = avio_rl16(pb);
132 2 avio_skip(pb, 2); // sample-size
133
134 2 memset(c->rates_per_mode, -1, sizeof(c->rates_per_mode));
135 2 nb_rates = avio_rl32(pb);
136 2 nb_rates = FFMIN(nb_rates, 8);
137
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 12 for (i=0; i<nb_rates; i++) {
138 10 int size = avio_r8(pb);
139 10 int mode = avio_r8(pb);
140
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 10 if (mode > QCP_MAX_MODE) {
141 ✗ av_log(s, AV_LOG_WARNING, "Unknown entry %d=>%d in rate-map-table.\n ", mode, size);
142 } else
143 10 c->rates_per_mode[mode] = size;
144 }
145 2 avio_skip(pb, 16 - 2*nb_rates + 20); // empty entries of rate-map-table + reserved
146
147 2 return 0;
148 }
149
150 992 static int qcp_read_packet(AVFormatContext *s, AVPacket *pkt)
151 {
152 992 AVIOContext *pb = s->pb;
153 992 QCPContext *c = s->priv_data;
154 unsigned int chunk_size, tag;
155
156
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 1002 while(!avio_feof(pb)) {
157
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 1000 if (c->data_size) {
158 990 int pkt_size, ret, mode = avio_r8(pb);
159
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 990 if (s->packet_size) {
161 ✗ pkt_size = s->packet_size - 1;
162
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 990 } else if (mode > QCP_MAX_MODE || (pkt_size = c->rates_per_mode[mode]) < 0) {
163 ✗ c->data_size--;
164 ✗ continue;
165 }
166
167
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 990 if (c->data_size <= pkt_size) {
168 ✗ av_log(s, AV_LOG_WARNING, "Data chunk is too small.\n");
169 ✗ pkt_size = c->data_size - 1;
170 }
171
172
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 990 if ((ret = av_get_packet(pb, pkt, pkt_size)) >= 0) {
173
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 990 if (pkt_size != ret)
174 ✗ av_log(s, AV_LOG_ERROR, "Packet size is too small.\n");
175
176 990 c->data_size -= pkt_size + 1;
177 }
178 990 return ret;
179 }
180
181
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 10 if (avio_tell(pb) & 1 && avio_r8(pb))
182 ✗ av_log(s, AV_LOG_WARNING, "Padding should be 0.\n");
183
184 10 tag = avio_rl32(pb);
185 10 chunk_size = avio_rl32(pb);
186
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 10 switch (tag) {
187 2 case MKTAG('v', 'r', 'a', 't'):
188
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 2 if (avio_rl32(pb)) // var-rate-flag
189 2 s->packet_size = 0;
190 2 avio_skip(pb, 4); // size-in-packets
191 2 break;
192 2 case MKTAG('d', 'a', 't', 'a'):
193 2 c->data_size = chunk_size;
194 2 break;
195
196 6 default:
197 6 avio_skip(pb, chunk_size);
198 }
199 }
200 2 return AVERROR_EOF;
201 }
202
203 const FFInputFormat ff_qcp_demuxer = {
204 .p.name = "qcp",
205 .p.long_name = NULL_IF_CONFIG_SMALL("QCP"),
206 .priv_data_size = sizeof(QCPContext),
207 .read_probe = qcp_probe,
208 .read_header = qcp_read_header,
209 .read_packet = qcp_read_packet,
210 };
211