CoreAudio: Separate enumeration code

The enumeration code being up at the top was making things quite messy, so I split that code out to a separate set of files.
2014-03-04 07:10:33 -07:00
parent 348588254c
commit bec8a09bd9
5 changed files with 148 additions and 130 deletions
--- a/plugins/mac-capture/audio-device-enum.c
+++ b/plugins/mac-capture/audio-device-enum.c
@@ -0,0 +1,103 @@
+#include <CoreFoundation/CFString.h>
+#include <CoreAudio/CoreAudio.h>
+
+#include "mac-helpers.h"
+#include "audio-device-enum.h"
+
+/* ugh, because mac has no means of capturing output, we have to basically
+ * mark soundflower and wavtap as output devices. */
+static inline bool device_is_input(char *device)
+{
+	return astrstri(device, "soundflower") == NULL &&
+	       astrstri(device, "wavtap")      == NULL;
+}
+
+static inline bool enum_success(OSStatus stat, const char *msg)
+{
+	if (stat != noErr) {
+		blog(LOG_WARNING, "[coreaudio_enum_devices] %s failed: %d",
+				msg, (int)stat);
+		return false;
+	}
+
+	return true;
+}
+
+static void coreaudio_enum_add_device(struct device_list *list,
+		AudioDeviceID id, bool input)
+{
+	OSStatus           stat;
+	UInt32             size     = 0;
+	CFStringRef        cf_name  = NULL;
+	CFStringRef        cf_value = NULL;
+	struct device_item item;
+
+	AudioObjectPropertyAddress addr = {
+		kAudioDevicePropertyStreams,
+		kAudioDevicePropertyScopeInput,
+		kAudioObjectPropertyElementMaster
+	};
+
+	memset(&item, 0, sizeof(item));
+
+	/* check to see if it's a mac input device */
+	AudioObjectGetPropertyDataSize(id, &addr, 0, NULL, &size);
+	if (!size)
+		return;
+
+	size = sizeof(CFStringRef);
+
+	addr.mSelector = kAudioDevicePropertyDeviceUID;
+	stat = AudioObjectGetPropertyData(id, &addr, 0, NULL, &size, &cf_value);
+	if (!enum_success(stat, "get audio device UID"))
+		return;
+
+	addr.mSelector = kAudioDevicePropertyDeviceNameCFString;
+	stat = AudioObjectGetPropertyData(id, &addr, 0, NULL, &size, &cf_name);
+	if (!enum_success(stat, "get audio device name"))
+		goto fail;
+
+	if (!cf_to_dstr(cf_name,  &item.name))
+		goto fail;
+	if (!cf_to_dstr(cf_value, &item.value))
+		goto fail;
+
+	if (input || !device_is_input(item.value.array))
+		device_list_add(list, &item);
+
+fail:
+	device_item_free(&item);
+	CFRelease(cf_name);
+	CFRelease(cf_value);
+}
+
+void coreaudio_enum_devices(struct device_list *list, bool input)
+{
+	AudioObjectPropertyAddress addr = {
+		kAudioHardwarePropertyDevices,
+		kAudioObjectPropertyScopeGlobal,
+		kAudioObjectPropertyElementMaster
+	};
+
+	UInt32        size = 0;
+	UInt32        count;
+	OSStatus      stat;
+	AudioDeviceID *ids;
+
+	stat = AudioObjectGetPropertyDataSize(kAudioObjectSystemObject, &addr,
+			0, NULL, &size);
+	if (!enum_success(stat, "get kAudioObjectSystemObject data size"))
+		return;
+
+	ids   = bmalloc(size);
+	count = size / sizeof(AudioDeviceID);
+
+	stat = AudioObjectGetPropertyData(kAudioObjectSystemObject, &addr,
+			0, NULL, &size, ids);
+
+	if (enum_success(stat, "get kAudioObjectSystemObject data"))
+		for (UInt32 i = 0; i < count; i++)
+			coreaudio_enum_add_device(list, ids[i], input);
+
+	bfree(ids);
+}