1 /*
2 * This file is part of MPlayer.
3 *
4 * MPlayer is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * MPlayer is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #include <stdio.h>
20 #include <stdlib.h>
21
22 #include "config.h"
23
24 #include <string.h> /* strerror */
25 #include <fcntl.h>
26 #include <errno.h>
27 #include <sys/ioctl.h>
28
29 #ifdef HAVE_SYS_SOUNDCARD_H
30 #include <sys/soundcard.h>
31 #else
32 #ifdef HAVE_SOUNDCARD_H
33 #include <soundcard.h>
34 #else
35 #include <linux/soundcard.h>
36 #endif
37 #endif
38
39 #include "audio_in.h"
40 #include "mp_msg.h"
41 #include "help_mp.h"
42
ai_oss_set_samplerate(audio_in_t * ai)43 int ai_oss_set_samplerate(audio_in_t *ai)
44 {
45 int tmp = ai->req_samplerate;
46 if (ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &tmp) == -1) return -1;
47 ai->samplerate = tmp;
48 return 0;
49 }
50
ai_oss_set_channels(audio_in_t * ai)51 int ai_oss_set_channels(audio_in_t *ai)
52 {
53 int err;
54 int ioctl_param;
55
56 if (ai->req_channels > 2)
57 {
58 ioctl_param = ai->req_channels;
59 mp_msg(MSGT_TV, MSGL_V, "ioctl dsp channels: %d\n",
60 err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_CHANNELS, &ioctl_param));
61 if (err < 0) {
62 mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetChanCount,
63 ai->req_channels);
64 return -1;
65 }
66 ai->channels = ioctl_param;
67 }
68 else
69 {
70 ioctl_param = (ai->req_channels == 2);
71 mp_msg(MSGT_TV, MSGL_V, "ioctl dsp stereo: %d (req: %d)\n",
72 err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_STEREO, &ioctl_param),
73 ioctl_param);
74 if (err < 0) {
75 mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetStereo,
76 ai->req_channels == 2);
77 return -1;
78 }
79 ai->channels = ioctl_param ? 2 : 1;
80 }
81 return 0;
82 }
83
ai_oss_init(audio_in_t * ai)84 int ai_oss_init(audio_in_t *ai)
85 {
86 int err;
87 int ioctl_param;
88
89 ai->oss.audio_fd = open(ai->oss.device, O_RDONLY);
90 if (ai->oss.audio_fd < 0)
91 {
92 mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2Open,
93 ai->oss.device, strerror(errno));
94 return -1;
95 }
96
97 ioctl_param = 0 ;
98 mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getfmt: %d\n",
99 ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETFMTS, &ioctl_param));
100
101 mp_msg(MSGT_TV, MSGL_V, "Supported formats: %x\n", ioctl_param);
102 if (!(ioctl_param & AFMT_S16_LE))
103 mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_UnsupportedFmt);
104
105 ioctl_param = AFMT_S16_LE;
106 mp_msg(MSGT_TV, MSGL_V, "ioctl dsp setfmt: %d\n",
107 err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETFMT, &ioctl_param));
108 if (err < 0) {
109 mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetAudioFmt);
110 return -1;
111 }
112
113 if (ai_oss_set_channels(ai) < 0) return -1;
114
115 ioctl_param = ai->req_samplerate;
116 mp_msg(MSGT_TV, MSGL_V, "ioctl dsp speed: %d\n",
117 err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &ioctl_param));
118 if (err < 0) {
119 mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetSamplerate,
120 ai->req_samplerate);
121 return -1;
122 }
123 ai->samplerate = ioctl_param;
124
125 mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n",
126 ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETTRIGGER, &ioctl_param));
127 mp_msg(MSGT_TV, MSGL_V, "trigger: %x\n", ioctl_param);
128 ioctl_param = PCM_ENABLE_INPUT;
129 mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n",
130 err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETTRIGGER, &ioctl_param));
131 if (err < 0) {
132 mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetTrigger,
133 PCM_ENABLE_INPUT);
134 }
135
136 ai->blocksize = 0;
137 mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getblocksize: %d\n",
138 err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETBLKSIZE, &ai->blocksize));
139 if (err < 0) {
140 mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2GetBlockSize);
141 }
142 mp_msg(MSGT_TV, MSGL_V, "blocksize: %d\n", ai->blocksize);
143
144 // correct the blocksize to a reasonable value
145 if (ai->blocksize <= 0) {
146 ai->blocksize = 4096*ai->channels*2;
147 mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_AudioBlockSizeZero, ai->blocksize);
148 } else if (ai->blocksize < 4096*ai->channels*2) {
149 ai->blocksize *= 4096*ai->channels*2/ai->blocksize;
150 mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_AudioBlockSize2Low, ai->blocksize);
151 }
152
153 ai->samplesize = 16;
154 ai->bytes_per_sample = 2;
155
156 return 0;
157 }
158