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
|
/*
* Copyright (C) 2018 "IoT.bzh"
* Author Fulup Ar Foll <fulup@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#define _GNU_SOURCE // needed for vasprintf
#include "alsa-softmixer.h"
ALSA_PLUG_PROTO(multi);
PUBLIC AlsaPcmInfoT* AlsaCreateMulti(CtlSourceT *source, const char *pcmUid) {
snd_config_t *multiConfig, *elemConfig, *slavesConfig, *slaveConfig, *bindingsConfig, *bindingConfig, *pcmConfig;
int error = 0, channelIdx=0;
AlsaPcmInfoT *pcmPlug = calloc(1, sizeof (AlsaPcmInfoT));
pcmPlug->uid = pcmUid;
pcmPlug->cardid = pcmUid;
AlsaPcmInfoT* pcmSlaves=Softmixer->sndcardCtl;
if (!Softmixer->sndcardCtl) {
AFB_ApiError(source->api, "AlsaCreateMulti: No Sound Card find [should register snd_cards first]");
goto OnErrorExit;
}
// refresh global alsalib config and create PCM top config
snd_config_update();
error += snd_config_top(&multiConfig);
error += snd_config_set_id (multiConfig, pcmPlug->cardid);
error += snd_config_imake_string(&elemConfig, "type", "multi");
error += snd_config_add(multiConfig, elemConfig);
if (error) goto OnErrorExit;
error += snd_config_make_compound(&slavesConfig, "slaves", 0);
error += snd_config_make_compound(&bindingsConfig, "bindings", 0);
// loop on sound card to include into multi
for (int idx = 0; pcmSlaves[idx].uid != NULL; idx++) {
AlsaPcmInfoT* sndcard=&pcmSlaves[idx];
AlsaPcmChannels *channels = sndcard->channels;
for (channelIdx=0; channels[channelIdx].uid != NULL; channelIdx++) {
char idxS[4]; // 999 channel should be more than enough
snprintf (idxS, sizeof(idxS), "%d", pcmPlug->ccount++);
// multi does not support to name channels
error += snd_config_make_compound(&bindingConfig,idxS, 0);
error += snd_config_imake_string(&elemConfig, "slave", sndcard->cardid);
error += snd_config_add(bindingConfig, elemConfig);
error += snd_config_imake_integer(&elemConfig,"channel", channelIdx);
error += snd_config_add(bindingConfig, elemConfig);
error += snd_config_add(bindingsConfig, bindingConfig);
}
error += snd_config_make_compound(&slaveConfig, sndcard->uid, 0);
error += snd_config_imake_string(&elemConfig, "pcm", sndcard->cardid);
error += snd_config_add(slaveConfig, elemConfig);
error += snd_config_imake_integer(&elemConfig, "channels", channelIdx);
error += snd_config_add(slaveConfig, elemConfig);
error += snd_config_add(slavesConfig, slaveConfig);
}
error += snd_config_add(multiConfig, slavesConfig);
error += snd_config_add(multiConfig, bindingsConfig);
if (error) goto OnErrorExit;
// update top config to access previous plugin PCM
snd_config_update();
error = _snd_pcm_multi_open(&pcmPlug->handle, pcmUid, snd_config, multiConfig, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
if (error) {
AFB_ApiError(source->api, "AlsaCreateMulti: fail to create Plug=%s Error=%s", pcmPlug->cardid, snd_strerror(error));
goto OnErrorExit;
}
error += snd_config_search(snd_config, "pcm", &pcmConfig);
error += snd_config_add(pcmConfig, multiConfig);
if (error) {
AFB_ApiError(source->api, "AlsaCreateDmix: fail to add configDMIX=%s", pcmPlug->cardid);
goto OnErrorExit;
}
// Debug config & pcm
//AlsaDumpCtlConfig(source, "plug-multi", multiConfig, 1);
//AlsaDumpPcmInfo(source, pcmPlug->handle, "pcmPlug->handle");
AFB_ApiNotice(source->api, "AlsaCreateMulti: %s done\n", pcmPlug->cardid);
return pcmPlug;
OnErrorExit:
AlsaDumpCtlConfig(source, "plug-multi", multiConfig, 1);
AFB_ApiNotice(source->api, "AlsaCreateMulti: OnErrorExit\n");
return NULL;
}
|
