1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/*
* THP Demuxer
* Copyright (c) 2007 Marco Gerards
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/intreadwrite.h"
#include "libavutil/intfloat.h"
#include "avformat.h"
#include "internal.h"
typedef struct ThpDemuxContext {
int version;
int first_frame;
int first_framesz;
int last_frame;
int compoff;
int framecnt;
AVRational fps;
int frame;
int next_frame;
int next_framesz;
int video_stream_index;
int audio_stream_index;
int compcount;
unsigned char components[16];
AVStream* vst;
int has_audio;
int audiosize;
} ThpDemuxContext;
static int thp_probe(AVProbeData *p)
{
/* check file header */
if (AV_RL32(p->buf) == MKTAG('T', 'H', 'P', '\0'))
return AVPROBE_SCORE_MAX;
else
return 0;
}
static int thp_read_header(AVFormatContext *s)
{
ThpDemuxContext *thp = s->priv_data;
AVStream *st;
AVIOContext *pb = s->pb;
int i;
/* Read the file header. */
avio_rb32(pb); /* Skip Magic. */
thp->version = avio_rb32(pb);
avio_rb32(pb); /* Max buf size. */
avio_rb32(pb); /* Max samples. */
thp->fps = av_d2q(av_int2float(avio_rb32(pb)), INT_MAX);
thp->framecnt = avio_rb32(pb);
thp->first_framesz = avio_rb32(pb);
avio_rb32(pb); /* Data size. */
thp->compoff = avio_rb32(pb);
avio_rb32(pb); /* offsetDataOffset. */
thp->first_frame = avio_rb32(pb);
thp->last_frame = avio_rb32(pb);
thp->next_framesz = thp->first_framesz;
thp->next_frame = thp->first_frame;
/* Read the component structure. */
avio_seek (pb, thp->compoff, SEEK_SET);
thp->compcount = avio_rb32(pb);
/* Read the list of component types. */
avio_read(pb, thp->components, 16);
for (i = 0; i < thp->compcount; i++) {
if (thp->components[i] == 0) {
if (thp->vst != 0)
break;
/* Video component. */
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
/* The denominator and numerator are switched because 1/fps
is required. */
avpriv_set_pts_info(st, 64, thp->fps.den, thp->fps.num);
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = AV_CODEC_ID_THP;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->width = avio_rb32(pb);
st->codec->height = avio_rb32(pb);
st->codec->sample_rate = av_q2d(thp->fps);
thp->vst = st;
thp->video_stream_index = st->index;
if (thp->version == 0x11000)
avio_rb32(pb); /* Unknown. */
} else if (thp->components[i] == 1) {
if (thp->has_audio != 0)
break;
/* Audio component. */
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = AV_CODEC_ID_ADPCM_THP;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->channels = avio_rb32(pb); /* numChannels. */
st->codec->sample_rate = avio_rb32(pb); /* Frequency. */
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
thp->audio_stream_index = st->index;
thp->has_audio = 1;
}
}
return 0;
}
static int thp_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
ThpDemuxContext *thp = s->priv_data;
AVIOContext *pb = s->pb;
int size;
int ret;
if (thp->audiosize == 0) {
/* Terminate when last frame is reached. */
if (thp->frame >= thp->framecnt)
return AVERROR(EIO);
avio_seek(pb, thp->next_frame, SEEK_SET);
/* Locate the next frame and read out its size. */
thp->next_frame += thp->next_framesz;
thp->next_framesz = avio_rb32(pb);
avio_rb32(pb); /* Previous total size. */
size = avio_rb32(pb); /* Total size of this frame. */
/* Store the audiosize so the next time this function is called,
the audio can be read. */
if (thp->has_audio)
thp->audiosize = avio_rb32(pb); /* Audio size. */
else
thp->frame++;
ret = av_get_packet(pb, pkt, size);
if (ret != size) {
av_packet_unref(pkt);
return AVERROR(EIO);
}
pkt->stream_index = thp->video_stream_index;
} else {
ret = av_get_packet(pb, pkt, thp->audiosize);
if (ret != thp->audiosize) {
av_packet_unref(pkt);
return AVERROR(EIO);
}
pkt->stream_index = thp->audio_stream_index;
if (thp->audiosize >= 8)
pkt->duration = AV_RB32(&pkt->data[4]);
thp->audiosize = 0;
thp->frame++;
}
return 0;
}
AVInputFormat ff_thp_demuxer = {
.name = "thp",
.long_name = NULL_IF_CONFIG_SMALL("THP"),
.priv_data_size = sizeof(ThpDemuxContext),
.read_probe = thp_probe,
.read_header = thp_read_header,
.read_packet = thp_read_packet
};
|
