FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/thp.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 91 104 87.5%
Functions: 3 3 100.0%
Branches: 32 54 59.3%
Line Branch Exec Source
1 /*
2 * THP Demuxer
3 * Copyright (c) 2007 Marco Gerards
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/intreadwrite.h"
23 #include "libavutil/intfloat.h"
24 #include "avformat.h"
25 #include "avio_internal.h"
26 #include "demux.h"
27 #include "internal.h"
28
29 typedef struct ThpDemuxContext {
30 int version;
31 unsigned first_frame;
32 unsigned first_framesz;
33 unsigned last_frame;
34 int compoff;
35 unsigned framecnt;
36 AVRational fps;
37 unsigned frame;
38 int64_t next_frame;
39 unsigned next_framesz;
40 int video_stream_index;
41 int audio_stream_index;
42 int compcount;
43 unsigned char components[16];
44 AVStream* vst;
45 int has_audio;
46 unsigned audiosize;
47 } ThpDemuxContext;
48
49
50 7186 static int thp_probe(const AVProbeData *p)
51 {
52 double d;
53 /* check file header */
54
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 7186 if (AV_RL32(p->buf) != MKTAG('T', 'H', 'P', '\0'))
55 7184 return 0;
56
57 2 d = av_int2float(AV_RB32(p->buf + 16));
58
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 2 if (d < 0.1 || d > 1000 || isnan(d))
59 ✗ return AVPROBE_SCORE_MAX/4;
60
61 2 return AVPROBE_SCORE_MAX;
62 }
63
64 2 static int thp_read_header(AVFormatContext *s)
65 {
66 2 ThpDemuxContext *thp = s->priv_data;
67 AVStream *st;
68 2 AVIOContext *pb = s->pb;
69 2 int64_t fsize= avio_size(pb);
70 uint32_t maxsize;
71 int i;
72
73 /* Read the file header. */
74 2 avio_rb32(pb); /* Skip Magic. */
75 2 thp->version = avio_rb32(pb);
76
77 2 avio_rb32(pb); /* Max buf size. */
78 2 avio_rb32(pb); /* Max samples. */
79
80 2 thp->fps = av_d2q(av_int2float(avio_rb32(pb)), INT_MAX);
81
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 2 if (thp->fps.den <= 0 || thp->fps.num < 0)
82 ✗ return AVERROR_INVALIDDATA;
83 2 thp->framecnt = avio_rb32(pb);
84 2 thp->first_framesz = avio_rb32(pb);
85 2 maxsize = avio_rb32(pb);
86
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 2 if (fsize > 0 && (!maxsize || fsize < maxsize))
87 2 maxsize = fsize;
88 2 ffiocontext(pb)->maxsize = fsize;
89
90 2 thp->compoff = avio_rb32(pb);
91 2 avio_rb32(pb); /* offsetDataOffset. */
92 2 thp->first_frame = avio_rb32(pb);
93 2 thp->last_frame = avio_rb32(pb);
94
95 2 thp->next_framesz = thp->first_framesz;
96 2 thp->next_frame = thp->first_frame;
97
98 /* Read the component structure. */
99 2 avio_seek (pb, thp->compoff, SEEK_SET);
100 2 thp->compcount = avio_rb32(pb);
101
102
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 2 if (thp->compcount > FF_ARRAY_ELEMS(thp->components))
103 ✗ return AVERROR_INVALIDDATA;
104
105 /* Read the list of component types. */
106 2 avio_read(pb, thp->components, 16);
107
108
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 6 for (i = 0; i < thp->compcount; i++) {
109
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 4 if (thp->components[i] == 0) {
110
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 2 if (thp->vst)
111 ✗ break;
112
113 /* Video component. */
114 2 st = avformat_new_stream(s, NULL);
115
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 2 if (!st)
116 ✗ return AVERROR(ENOMEM);
117
118 /* The denominator and numerator are switched because 1/fps
119 is required. */
120 2 avpriv_set_pts_info(st, 64, thp->fps.den, thp->fps.num);
121 2 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
122 2 st->codecpar->codec_id = AV_CODEC_ID_THP;
123 2 st->codecpar->codec_tag = 0; /* no fourcc */
124 2 st->codecpar->width = avio_rb32(pb);
125 2 st->codecpar->height = avio_rb32(pb);
126 2 st->codecpar->sample_rate = av_q2d(thp->fps);
127 2 st->nb_frames =
128 2 st->duration = thp->framecnt;
129 2 thp->vst = st;
130 2 thp->video_stream_index = st->index;
131
132
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 2 if (thp->version == 0x11000)
133 2 avio_rb32(pb); /* Unknown. */
134
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 2 } else if (thp->components[i] == 1) {
135
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 2 if (thp->has_audio != 0)
136 ✗ break;
137
138 /* Audio component. */
139 2 st = avformat_new_stream(s, NULL);
140
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 2 if (!st)
141 ✗ return AVERROR(ENOMEM);
142
143 2 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
144 2 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_THP;
145 2 st->codecpar->codec_tag = 0; /* no fourcc */
146 2 st->codecpar->ch_layout.nb_channels = avio_rb32(pb);
147 2 st->codecpar->sample_rate = avio_rb32(pb); /* Frequency. */
148 2 st->duration = avio_rb32(pb);
149
150 2 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
151
152 2 thp->audio_stream_index = st->index;
153 2 thp->has_audio = 1;
154 }
155 }
156
157
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 2 if (!thp->vst)
158 ✗ return AVERROR_INVALIDDATA;
159
160 2 return 0;
161 }
162
163 288 static int thp_read_packet(AVFormatContext *s,
164 AVPacket *pkt)
165 {
166 288 ThpDemuxContext *thp = s->priv_data;
167 288 AVIOContext *pb = s->pb;
168 unsigned int size;
169 int ret;
170
171
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 288 if (thp->audiosize == 0) {
172 /* Terminate when last frame is reached. */
173
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 144 if (thp->frame >= thp->framecnt)
174 ✗ return AVERROR_EOF;
175
176 144 avio_seek(pb, thp->next_frame, SEEK_SET);
177
178 /* Locate the next frame and read out its size. */
179 144 thp->next_frame += FFMAX(thp->next_framesz, 1);
180 144 thp->next_framesz = avio_rb32(pb);
181
182 144 avio_rb32(pb); /* Previous total size. */
183 144 size = avio_rb32(pb); /* Total size of this frame. */
184
185 /* Store the audiosize so the next time this function is called,
186 the audio can be read. */
187
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 144 if (thp->has_audio)
188 144 thp->audiosize = avio_rb32(pb); /* Audio size. */
189 else
190 ✗ thp->frame++;
191
192 144 ret = av_get_packet(pb, pkt, size);
193
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 144 if (ret < 0)
194 ✗ return ret;
195
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 144 if (ret != size) {
196 ✗ return AVERROR(EIO);
197 }
198
199 144 pkt->stream_index = thp->video_stream_index;
200 } else {
201 144 ret = av_get_packet(pb, pkt, thp->audiosize);
202
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 144 if (ret < 0)
203 ✗ return ret;
204
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 144 if (ret != thp->audiosize) {
205 2 return AVERROR(EIO);
206 }
207
208 142 pkt->stream_index = thp->audio_stream_index;
209
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 142 if (thp->audiosize >= 8)
210 142 pkt->duration = AV_RB32(&pkt->data[4]);
211
212 142 thp->audiosize = 0;
213 142 thp->frame++;
214 }
215
216 286 return 0;
217 }
218
219 const FFInputFormat ff_thp_demuxer = {
220 .p.name = "thp",
221 .p.long_name = NULL_IF_CONFIG_SMALL("THP"),
222 .priv_data_size = sizeof(ThpDemuxContext),
223 .read_probe = thp_probe,
224 .read_header = thp_read_header,
225 .read_packet = thp_read_packet
226 };
227