pica-client/audio: enumerate ALSA devices on Linux

1 files changed, 55 insertions, 1 deletions

diff --git a/pica-client/audiodevice.cpp b/pica-client/audiodevice.cpp
index 16bf0b1..d2995e3 100644
--- a/pica-client/audiodevice.cpp
+++ b/pica-client/audiodevice.cpp
@@ -1,5 +1,9 @@
 #include "audiodevice.h"
 
+#ifdef Q_OS_LINUX
+#include <alsa/asoundlib.h>
+#endif
+
 AudioDevice::AudioDevice()
 {
 
@@ -10,7 +14,57 @@ AudioDevice::~AudioDevice()
 
 }
 
-QList<MediaDeviceInfo> AudioDevice::Enumerate()
+void AudioDevice::Capture()
+{
+}
+
+void AudioDevice::Play()
+{
+}
+
+void AudioDevice::Close()
 {
+}
+
+QList<MediaDeviceInfo> AudioDevice::Enumerate(enum MediaDeviceStreamDirection dir)
+{
+	QList<MediaDeviceInfo> result;
+	int index = 0;
+
+#ifdef Q_OS_LINUX
+	void **hints, **n;
+	char *name = NULL, *descr = NULL, *io = NULL;
+	const char *direction = (dir == PLAYBACK) ? "Output" : "Input";
+
+	if (snd_device_name_hint(-1, "pcm", &hints) < 0)
+		return result;
+	n = hints;
+	while(*n)
+	{
+		MediaDeviceInfo d;
+
+		name = snd_device_name_get_hint(*n, "NAME");
+		descr = snd_device_name_get_hint(*n, "DESC");
+		io = snd_device_name_get_hint(*n, "IOID");
+
+		if (io && strcmp(io, direction))
+			goto release_resources;
+
+		d.device = QLatin1String(name);
+		d.humanReadable = QLatin1String(descr);
+		d.index = index++;
+		if (strstr(name, "default") == name)
+			result.prepend(d);
+		else
+			result << d;
 
+	release_resources:
+		free(io);
+		free(descr);
+		free(name);
+		n++;
+	}
+	snd_device_name_free_hint(hints);
+#endif
+	return result;
 }