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break out ALSA related functions into libardouralsautil

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This commit is contained in:
Robin Gareus 2014-06-04 19:16:37 +02:00
parent 40cfe86569
commit a907d3455e
11 changed files with 317 additions and 226 deletions
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57
libs/backends/jack/jack_utils.cc
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@ -19,7 +19,7 @@
*/
#ifdef HAVE_ALSA
#include <alsa/asoundlib.h>
#include "ardouralsautil/devicelist.h"
#endif
#ifdef __APPLE__
@ -276,60 +276,7 @@ void
ARDOUR::get_jack_alsa_device_names (device_map_t& devices)
{
#ifdef HAVE_ALSA
snd_ctl_t *handle;
snd_ctl_card_info_t *info;
snd_pcm_info_t *pcminfo;
snd_ctl_card_info_alloca(&info);
snd_pcm_info_alloca(&pcminfo);
string devname;
int cardnum = -1;
int device = -1;
while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) {
devname = "hw:";
devname += PBD::to_string (cardnum, std::dec);
if (snd_ctl_open (&handle, devname.c_str(), 0) >= 0 && snd_ctl_card_info (handle, info) >= 0) {
if (snd_ctl_card_info (handle, info) < 0) {
continue;
}
string card_name = snd_ctl_card_info_get_name (info);
/* change devname to use ID, not number */
devname = "hw:";
devname += snd_ctl_card_info_get_id (info);
while (snd_ctl_pcm_next_device (handle, &device) >= 0 && device >= 0) {
/* only detect duplex devices here. more
* complex arrangements are beyond our scope
*/
snd_pcm_info_set_device (pcminfo, device);
snd_pcm_info_set_subdevice (pcminfo, 0);
snd_pcm_info_set_stream (pcminfo, SND_PCM_STREAM_CAPTURE);
if (snd_ctl_pcm_info (handle, pcminfo) >= 0) {
snd_pcm_info_set_device (pcminfo, device);
snd_pcm_info_set_subdevice (pcminfo, 0);
snd_pcm_info_set_stream (pcminfo, SND_PCM_STREAM_PLAYBACK);
if (snd_ctl_pcm_info (handle, pcminfo) >= 0) {
devname += ',';
devname += PBD::to_string (device, std::dec);
devices.insert (std::make_pair (card_name, devname));
}
}
}
snd_ctl_close(handle);
}
}
get_alsa_audio_device_names(devices);
#else
/* silence a compiler unused variable warning */
(void) devices;