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
|
/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include "config.h"
#include <string.h> /* strerror */
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#ifdef HAVE_SYS_SOUNDCARD_H
#include <sys/soundcard.h>
#else
#ifdef HAVE_SOUNDCARD_H
#include <soundcard.h>
#else
#include <linux/soundcard.h>
#endif
#endif
#include "audio_in.h"
#include "mp_msg.h"
#include "help_mp.h"
int ai_oss_set_samplerate(audio_in_t *ai)
{
int tmp = ai->req_samplerate;
if (ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &tmp) == -1) return -1;
ai->samplerate = tmp;
return 0;
}
int ai_oss_set_channels(audio_in_t *ai)
{
int err;
int ioctl_param;
if (ai->req_channels > 2)
{
ioctl_param = ai->req_channels;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp channels: %d\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_CHANNELS, &ioctl_param));
if (err < 0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetChanCount,
ai->req_channels);
return -1;
}
ai->channels = ioctl_param;
}
else
{
ioctl_param = (ai->req_channels == 2);
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp stereo: %d (req: %d)\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_STEREO, &ioctl_param),
ioctl_param);
if (err < 0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetStereo,
ai->req_channels == 2);
return -1;
}
ai->channels = ioctl_param ? 2 : 1;
}
return 0;
}
int ai_oss_init(audio_in_t *ai)
{
int err;
int ioctl_param;
ai->oss.audio_fd = open(ai->oss.device, O_RDONLY);
if (ai->oss.audio_fd < 0)
{
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2Open,
ai->oss.device, strerror(errno));
return -1;
}
ioctl_param = 0 ;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getfmt: %d\n",
ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETFMTS, &ioctl_param));
mp_msg(MSGT_TV, MSGL_V, "Supported formats: %x\n", ioctl_param);
if (!(ioctl_param & AFMT_S16_LE))
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_UnsupportedFmt);
ioctl_param = AFMT_S16_LE;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp setfmt: %d\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETFMT, &ioctl_param));
if (err < 0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetAudioFmt);
return -1;
}
if (ai_oss_set_channels(ai) < 0) return -1;
ioctl_param = ai->req_samplerate;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp speed: %d\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &ioctl_param));
if (err < 0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetSamplerate,
ai->req_samplerate);
return -1;
}
ai->samplerate = ioctl_param;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n",
ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETTRIGGER, &ioctl_param));
mp_msg(MSGT_TV, MSGL_V, "trigger: %x\n", ioctl_param);
ioctl_param = PCM_ENABLE_INPUT;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETTRIGGER, &ioctl_param));
if (err < 0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetTrigger,
PCM_ENABLE_INPUT);
}
ai->blocksize = 0;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getblocksize: %d\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETBLKSIZE, &ai->blocksize));
if (err < 0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2GetBlockSize);
}
mp_msg(MSGT_TV, MSGL_V, "blocksize: %d\n", ai->blocksize);
// correct the blocksize to a reasonable value
if (ai->blocksize <= 0) {
ai->blocksize = 4096*ai->channels*2;
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_AudioBlockSizeZero, ai->blocksize);
} else if (ai->blocksize < 4096*ai->channels*2) {
ai->blocksize *= 4096*ai->channels*2/ai->blocksize;
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_AudioBlockSize2Low, ai->blocksize);
}
ai->samplesize = 16;
ai->bytes_per_sample = 2;
return 0;
}
|
