diff --git a/src/Makefile.am b/src/Makefile.am
index 70ab5b079..fa5d17023 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1068,7 +1068,8 @@ endif
 
 if HAVE_COREAUDIO
 modlibexec_LTLIBRARIES += \
-		module-coreaudio-detect.la
+		module-coreaudio-detect.la \
+		module-coreaudio-device.la
 endif
 
 pulselibexec_PROGRAMS =
@@ -1244,6 +1245,7 @@ SYMDEF_FILES = \
 		modules/alsa/module-alsa-source-symdef.h \
 		modules/alsa/module-alsa-card-symdef.h \
 		modules/coreaudio/module-coreaudio-detect-symdef.h \
+		modules/coreaudio/module-coreaudio-device-symdef.h \
 		modules/module-solaris-symdef.h \
 		modules/module-waveout-symdef.h \
 		modules/module-detect-symdef.h \
@@ -1483,6 +1485,11 @@ module_coreaudio_detect_la_LDFLAGS = $(MODULE_LDFLAGS) \
 			-Wl,-framework -Wl,AudioUnit -framework AudioUnit
 module_coreaudio_detect_la_LIBADD = $(AM_LIBADD) libpulsecore-@PA_MAJORMINORMICRO@.la libpulsecommon-@PA_MAJORMINORMICRO@.la libpulse.la
 
+module_coreaudio_device_la_SOURCES = modules/coreaudio/module-coreaudio-device.c
+module_coreaudio_device_la_LDFLAGS = $(MODULE_LDFLAGS) \
+			-Wl,-framework -Wl,Cocoa -framework CoreAudio \
+			-Wl,-framework -Wl,AudioUnit -framework AudioUnit
+module_coreaudio_device_la_LIBADD = $(AM_LIBADD) libpulsecore-@PA_MAJORMINORMICRO@.la libpulsecommon-@PA_MAJORMINORMICRO@.la libpulse.la
 # ALSA
 
 libalsa_util_la_SOURCES = modules/alsa/alsa-util.c modules/alsa/alsa-util.h modules/alsa/alsa-mixer.c modules/alsa/alsa-mixer.h modules/alsa/alsa-sink.c modules/alsa/alsa-sink.h modules/alsa/alsa-source.c modules/alsa/alsa-source.h modules/reserve-wrap.c modules/reserve-wrap.h
diff --git a/src/modules/coreaudio/module-coreaudio-device.c b/src/modules/coreaudio/module-coreaudio-device.c
new file mode 100644
index 000000000..a3699e686
--- /dev/null
+++ b/src/modules/coreaudio/module-coreaudio-device.c
@@ -0,0 +1,820 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2009 Daniel Mack <daniel@caiaq.de>
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+/* TODO:
+    - implement hardware volume controls
+    - handle audio device stream format changes (will require changes to the core)
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <pulse/xmalloc.h>
+#include <pulse/util.h>
+
+#include <pulsecore/core-error.h>
+#include <pulsecore/sink.h>
+#include <pulsecore/source.h>
+#include <pulsecore/module.h>
+#include <pulsecore/sample-util.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/log.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/llist.h>
+#include <pulsecore/card.h>
+#include <pulsecore/strbuf.h>
+#include <pulsecore/thread.h>
+#include <pulsecore/thread-mq.h>
+
+#include <CoreAudio/CoreAudio.h>
+#include <CoreAudio/CoreAudioTypes.h>
+#include <CoreAudio/AudioHardware.h>
+
+#include "module-coreaudio-device-symdef.h"
+
+#define DEFAULT_FRAMES_PER_IOPROC 512
+
+PA_MODULE_AUTHOR("Daniel Mack");
+PA_MODULE_DESCRIPTION("CoreAudio device");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(FALSE);
+PA_MODULE_USAGE("device_id=<the CoreAudio device id> "
+                "ioproc_frames=<audio frames per IOProc call> ");
+
+static const char* const valid_modargs[] = {
+    "device_id",
+    "ioproc_frames",
+    NULL
+};
+
+enum {
+    CA_MESSAGE_RENDER = PA_SINK_MESSAGE_MAX,
+};
+
+typedef struct coreaudio_sink coreaudio_sink;
+typedef struct coreaudio_source coreaudio_source;
+
+struct userdata {
+    AudioDeviceID device_id;
+    AudioDeviceIOProcID proc_id;
+
+    pa_thread_mq thread_mq;
+    pa_asyncmsgq *async_msgq;
+
+    pa_rtpoll *rtpoll;
+    pa_thread *thread;
+
+    pa_module *module;
+    pa_card *card;
+    pa_bool_t running;
+
+    char *device_name, *vendor_name;
+
+    const AudioBufferList *render_input_data;
+    AudioBufferList       *render_output_data;
+
+    AudioStreamBasicDescription stream_description;
+
+    PA_LLIST_HEAD(coreaudio_sink, sinks);
+    PA_LLIST_HEAD(coreaudio_source, sources);
+};
+
+struct coreaudio_sink {
+    pa_sink *pa_sink;
+    struct userdata *userdata;
+
+    char *name;
+    unsigned int channel_idx;
+    pa_bool_t active;
+
+    pa_channel_map map;
+    pa_sample_spec ss;
+
+    PA_LLIST_FIELDS(coreaudio_sink);
+};
+
+struct coreaudio_source {
+    pa_source *pa_source;
+    struct userdata *userdata;
+
+    char *name;
+    unsigned int channel_idx;
+    pa_bool_t active;
+
+    pa_channel_map map;
+    pa_sample_spec ss;
+
+    PA_LLIST_FIELDS(coreaudio_source);
+};
+
+static OSStatus io_render_proc (AudioDeviceID          device,
+                                const AudioTimeStamp  *now,
+                                const AudioBufferList *inputData,
+                                const AudioTimeStamp  *inputTime,
+                                AudioBufferList       *outputData,
+                                const AudioTimeStamp  *outputTime,
+                                void                  *clientData)
+{
+    struct userdata *u = clientData;
+
+    pa_assert(u);
+    pa_assert(device == u->device_id);
+
+    u->render_input_data = inputData;
+    u->render_output_data = outputData;
+
+    if (u->sinks)
+        pa_assert_se(pa_asyncmsgq_send(u->async_msgq, PA_MSGOBJECT(u->sinks->pa_sink),
+                                        CA_MESSAGE_RENDER, NULL, 0, NULL) == 0);
+
+    if (u->sources)
+        pa_assert_se(pa_asyncmsgq_send(u->async_msgq, PA_MSGOBJECT(u->sources->pa_source),
+                                        CA_MESSAGE_RENDER, NULL, 0, NULL) == 0);
+
+    return 0;
+}
+
+static OSStatus ca_stream_format_changed(AudioDeviceID inDevice,
+                                         UInt32 inChannel,
+                                         Boolean isInput,
+                                         AudioDevicePropertyID inPropertyID,
+                                         void *inClientData)
+{
+    struct userdata *u = inClientData;
+
+    pa_assert(u);
+
+    /* REVISIT: PA can't currently handle external format change requests.
+     * Hence, we set the original format back in this callback to avoid horrible audio artefacts.
+     * The device settings will appear to be 'locked' for any application as long as the PA daemon is running.
+     * Once we're able to propagate such events up in the core, this needs to be changed. */
+
+    return AudioDeviceSetProperty(inDevice, NULL, inChannel, isInput,
+                                  kAudioDevicePropertyStreamFormat, sizeof(u->stream_description), &u->stream_description);
+}
+
+static pa_usec_t get_latency_us(pa_object *o) {
+    struct userdata *u;
+    pa_sample_spec *ss;
+    bool is_source;
+    UInt32 v, total = 0;
+    UInt32 err, size = sizeof(v);
+
+    if (pa_sink_isinstance(o)) {
+        coreaudio_sink *sink = PA_SINK(o)->userdata;
+
+        u = sink->userdata;
+        ss = &sink->ss;
+        is_source = FALSE;
+    } else if (pa_source_isinstance(o)) {
+        coreaudio_source *source = PA_SOURCE(o)->userdata;
+
+        u = source->userdata;
+        ss = &source->ss;
+        is_source = TRUE;
+    } else
+        pa_assert_not_reached();
+
+    pa_assert(u);
+
+    /* get the device latency */
+    size = sizeof(total);
+    AudioDeviceGetProperty(u->device_id, 0, is_source, kAudioDevicePropertyLatency, &size, &v);
+    total += v;
+
+    /* the the IOProc buffer size */
+    size = sizeof(v);
+    AudioDeviceGetProperty(u->device_id, 0, is_source, kAudioDevicePropertyBufferFrameSize, &size, &v);
+    total += v;
+
+    /* IOProc safety offset - this value is the same for both directions, hence we divide it by 2 */
+    size = sizeof(v);
+    AudioDeviceGetProperty(u->device_id, 0, is_source, kAudioDevicePropertySafetyOffset, &size, &v);
+    total += v / 2;
+
+    /* get the stream latency.
+     * FIXME: this assumes the stream latency is the same for all streams */
+    err = AudioStreamGetProperty(0, is_source, kAudioStreamPropertyLatency, &size, &v);
+    if (!err)
+        total += v;
+
+    return pa_bytes_to_usec(total * pa_frame_size(ss), ss);
+}
+
+static void ca_device_check_device_state(struct userdata *u) {
+    coreaudio_sink *ca_sink;
+    coreaudio_source *ca_source;
+    pa_bool_t active = FALSE;
+
+    pa_assert(u);
+
+    for (ca_sink = u->sinks; ca_sink; ca_sink = ca_sink->next)
+        if (ca_sink->active)
+            active = TRUE;
+
+    for (ca_source = u->sources; ca_source; ca_source = ca_source->next)
+        if (ca_source->active)
+            active = TRUE;
+
+    if (active && !u->running)
+        AudioDeviceStart(u->device_id, u->proc_id);
+    else if (!active && u->running)
+        AudioDeviceStop(u->device_id, u->proc_id);
+
+    u->running = active;
+}
+
+static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
+    coreaudio_sink *sink = PA_SINK(o)->userdata;
+    struct userdata *u = sink->userdata;
+    unsigned int i;
+    pa_memchunk audio_chunk;
+
+    switch (code) {
+        case CA_MESSAGE_RENDER: {
+            /* audio out */
+            for (i = 0; i < u->render_output_data->mNumberBuffers; i++) {
+                AudioBuffer *buf = u->render_output_data->mBuffers + i;
+
+                pa_assert(sink);
+
+                if (PA_SINK_IS_OPENED(sink->pa_sink->thread_info.state)) {
+                    if (sink->pa_sink->thread_info.rewind_requested)
+                        pa_sink_process_rewind(sink->pa_sink, 0);
+
+                    audio_chunk.memblock = pa_memblock_new_fixed(u->module->core->mempool, buf->mData, buf->mDataByteSize, FALSE);
+                    audio_chunk.length = buf->mDataByteSize;
+                    audio_chunk.index = 0;
+
+                    pa_sink_render_into_full(sink->pa_sink, &audio_chunk);
+                    pa_memblock_unref_fixed(audio_chunk.memblock);
+                }
+
+                sink = sink->next;
+            }
+
+            return 0;
+        }
+
+        case PA_SINK_MESSAGE_GET_LATENCY: {
+            *((pa_usec_t *) data) = get_latency_us(PA_OBJECT(o));
+            return 0;
+        }
+
+        case PA_SINK_MESSAGE_SET_STATE:
+            switch ((pa_sink_state_t) PA_PTR_TO_UINT(data)) {
+                case PA_SINK_SUSPENDED:
+                case PA_SINK_IDLE:
+                    sink->active = FALSE;
+                    break;
+
+                case PA_SINK_RUNNING:
+                    sink->active = TRUE;
+                    break;
+
+                case PA_SINK_UNLINKED:
+                case PA_SINK_INIT:
+                case PA_SINK_INVALID_STATE:
+                    ;
+            }
+
+            ca_device_check_device_state(sink->userdata);
+            break;
+    }
+
+    return pa_sink_process_msg(o, code, data, offset, chunk);
+}
+
+static int source_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
+    coreaudio_source *source = PA_SOURCE(o)->userdata;
+    struct userdata *u = source->userdata;
+    unsigned int i;
+    pa_memchunk audio_chunk;
+
+    switch (code) {
+        case CA_MESSAGE_RENDER: {
+            /* audio in */
+            for (i = 0; i < u->render_input_data->mNumberBuffers; i++) {
+                const AudioBuffer *buf = u->render_input_data->mBuffers + i;
+
+                pa_assert(source);
+
+                if (PA_SOURCE_IS_OPENED(source->pa_source->thread_info.state)) {
+                    audio_chunk.memblock = pa_memblock_new_fixed(u->module->core->mempool, buf->mData, buf->mDataByteSize, TRUE);
+                    audio_chunk.length = buf->mDataByteSize;
+                    audio_chunk.index = 0;
+
+                    pa_source_post(source->pa_source, &audio_chunk);
+                    pa_memblock_unref_fixed(audio_chunk.memblock);
+                }
+
+                source = source->next;
+            }
+
+            return 0;
+        }
+
+        case PA_SOURCE_MESSAGE_GET_LATENCY: {
+            *((pa_usec_t *) data) = get_latency_us(PA_OBJECT(o));
+            return 0;
+        }
+
+        case PA_SOURCE_MESSAGE_SET_STATE:
+            switch ((pa_source_state_t) PA_PTR_TO_UINT(data)) {
+                case PA_SOURCE_SUSPENDED:
+                case PA_SOURCE_IDLE:
+                    source->active = FALSE;
+                    break;
+
+                case PA_SOURCE_RUNNING:
+                    source->active = TRUE;
+                    break;
+
+                case PA_SOURCE_UNLINKED:
+                case PA_SOURCE_INIT:
+                case PA_SOURCE_INVALID_STATE:
+                    ;
+            }
+
+            ca_device_check_device_state(source->userdata);
+            break;
+    }
+
+    return pa_source_process_msg(o, code, data, offset, chunk);
+}
+
+static int ca_device_create_sink(pa_module *m, AudioBuffer *buf, int channel_idx) {
+    OSStatus err;
+    UInt32 size;
+    struct userdata *u = m->userdata;
+    pa_sink_new_data new_data;
+    pa_sink_flags_t flags = PA_SINK_LATENCY | PA_SINK_HARDWARE;
+    coreaudio_sink *ca_sink;
+    pa_sink *sink;
+    unsigned int i;
+    char tmp[255];
+    pa_strbuf *strbuf;
+
+    ca_sink = pa_xnew0(coreaudio_sink, 1);
+    ca_sink->map.channels = buf->mNumberChannels;
+    ca_sink->ss.channels = buf->mNumberChannels;
+    ca_sink->channel_idx = channel_idx;
+
+    /* build a name for this stream */
+    strbuf = pa_strbuf_new();
+
+    for (i = 0; i < buf->mNumberChannels; i++) {
+        size = sizeof(tmp);
+        err = AudioDeviceGetProperty(u->device_id, channel_idx + i + 1, 0, kAudioObjectPropertyElementName, &size, tmp);
+        if (err || !strlen(tmp))
+            snprintf(tmp, sizeof(tmp), "Channel %d", channel_idx + i + 1);
+
+        if (i > 0)
+            pa_strbuf_puts(strbuf, ", ");
+
+        pa_strbuf_puts(strbuf, tmp);
+    }
+
+    ca_sink->name = pa_strbuf_tostring_free(strbuf);
+
+    pa_log_debug("Stream name is >%s<", ca_sink->name);
+
+    /* default to mono streams */
+    for (i = 0; i < ca_sink->map.channels; i++)
+        ca_sink->map.map[i] = PA_CHANNEL_POSITION_MONO;
+
+    if (buf->mNumberChannels == 2) {
+        ca_sink->map.map[0] = PA_CHANNEL_POSITION_LEFT;
+        ca_sink->map.map[1] = PA_CHANNEL_POSITION_RIGHT;
+    }
+
+    ca_sink->ss.rate = u->stream_description.mSampleRate;
+    ca_sink->ss.format = PA_SAMPLE_FLOAT32LE;
+
+    pa_sink_new_data_init(&new_data);
+    new_data.card = u->card;
+    new_data.driver = __FILE__;
+    new_data.module = u->module;
+    new_data.namereg_fail = FALSE;
+    pa_sink_new_data_set_name(&new_data, ca_sink->name);
+    pa_sink_new_data_set_channel_map(&new_data, &ca_sink->map);
+    pa_sink_new_data_set_sample_spec(&new_data, &ca_sink->ss);
+    pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_STRING, u->device_name);
+    pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_PRODUCT_NAME, u->device_name);
+    pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_DESCRIPTION, u->device_name);
+    pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_ACCESS_MODE, "mmap");
+    pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_CLASS, "sound");
+    pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_API, "CoreAudio");
+    pa_proplist_setf(new_data.proplist, PA_PROP_DEVICE_BUFFERING_BUFFER_SIZE, "%lu", (unsigned long) buf->mDataByteSize);
+
+    if (u->vendor_name)
+        pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_VENDOR_NAME, u->vendor_name);
+
+    sink = pa_sink_new(m->core, &new_data, flags);
+    pa_sink_new_data_done(&new_data);
+
+    if (!sink) {
+        pa_log("unable to create sink.");
+        return -1;
+    }
+
+    sink->parent.process_msg = sink_process_msg;
+    sink->userdata = ca_sink;
+
+    pa_sink_set_asyncmsgq(sink, u->thread_mq.inq);
+    pa_sink_set_rtpoll(sink, u->rtpoll);
+
+    ca_sink->pa_sink = sink;
+    ca_sink->userdata = u;
+
+    PA_LLIST_PREPEND(coreaudio_sink, u->sinks, ca_sink);
+
+    return 0;
+}
+
+static int ca_device_create_source(pa_module *m, AudioBuffer *buf, int channel_idx) {
+    OSStatus err;
+    UInt32 size;
+    struct userdata *u = m->userdata;
+    pa_source_new_data new_data;
+    pa_source_flags_t flags = PA_SOURCE_LATENCY | PA_SOURCE_HARDWARE;
+    coreaudio_source *ca_source;
+    pa_source *source;
+    unsigned int i;
+    char tmp[255];
+    pa_strbuf *strbuf;
+
+    ca_source = pa_xnew0(coreaudio_source, 1);
+    ca_source->map.channels = buf->mNumberChannels;
+    ca_source->ss.channels = buf->mNumberChannels;
+    ca_source->channel_idx = channel_idx;
+
+    /* build a name for this stream */
+    strbuf = pa_strbuf_new();
+
+    for (i = 0; i < buf->mNumberChannels; i++) {
+        size = sizeof(tmp);
+        err = AudioDeviceGetProperty(u->device_id, channel_idx + i + 1, 0, kAudioObjectPropertyElementName, &size, tmp);
+        if (err || !strlen(tmp))
+            snprintf(tmp, sizeof(tmp), "Channel %d", channel_idx + i + 1);
+
+        if (i > 0)
+            pa_strbuf_puts(strbuf, ", ");
+
+        pa_strbuf_puts(strbuf, tmp);
+    }
+
+    ca_source->name = pa_strbuf_tostring_free(strbuf);
+
+    pa_log_debug("Stream name is >%s<", ca_source->name);
+
+    /* default to mono streams */
+    for (i = 0; i < ca_source->map.channels; i++)
+        ca_source->map.map[i] = PA_CHANNEL_POSITION_MONO;
+
+    if (buf->mNumberChannels == 2) {
+        ca_source->map.map[0] = PA_CHANNEL_POSITION_LEFT;
+        ca_source->map.map[1] = PA_CHANNEL_POSITION_RIGHT;
+    }
+
+    ca_source->ss.rate = u->stream_description.mSampleRate;
+    ca_source->ss.format = PA_SAMPLE_FLOAT32LE;
+
+    pa_source_new_data_init(&new_data);
+    new_data.card = u->card;
+    new_data.driver = __FILE__;
+    new_data.module = u->module;
+    new_data.namereg_fail = FALSE;
+    pa_source_new_data_set_name(&new_data, ca_source->name);
+    pa_source_new_data_set_channel_map(&new_data, &ca_source->map);
+    pa_source_new_data_set_sample_spec(&new_data, &ca_source->ss);
+    pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_STRING, u->device_name);
+    pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_PRODUCT_NAME, u->device_name);
+    pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_DESCRIPTION, u->device_name);
+    pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_ACCESS_MODE, "mmap");
+    pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_CLASS, "sound");
+    pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_API, "CoreAudio");
+    pa_proplist_setf(new_data.proplist, PA_PROP_DEVICE_BUFFERING_BUFFER_SIZE, "%lu", (unsigned long) buf->mDataByteSize);
+
+    if (u->vendor_name)
+        pa_proplist_sets(new_data.proplist, PA_PROP_DEVICE_VENDOR_NAME, u->vendor_name);
+
+    source = pa_source_new(m->core, &new_data, flags);
+    pa_source_new_data_done(&new_data);
+
+    if (!source) {
+        pa_log("unable to create source.");
+        return -1;
+    }
+
+    source->parent.process_msg = source_process_msg;
+    source->userdata = ca_source;
+
+    pa_source_set_asyncmsgq(source, u->thread_mq.inq);
+    pa_source_set_rtpoll(source, u->rtpoll);
+
+    ca_source->pa_source = source;
+    ca_source->userdata = u;
+
+    PA_LLIST_PREPEND(coreaudio_source, u->sources, ca_source);
+
+    return 0;
+}
+
+static int ca_device_create_streams(pa_module *m, bool direction_in) {
+    OSStatus err;
+    UInt32 size, i, channel_idx;
+    struct userdata *u = m->userdata;
+    int section = direction_in ? 1 : 0;
+    AudioBufferList *buffer_list;
+
+    /* get current stream format */
+    size = sizeof(AudioStreamBasicDescription);
+    err = AudioDeviceGetProperty(u->device_id, 0, section, kAudioDevicePropertyStreamFormat, &size, &u->stream_description);
+    if (err) {
+        /* no appropriate streams found - silently bail. */
+        return -1;
+    }
+
+    if (u->stream_description.mFormatID != kAudioFormatLinearPCM) {
+        pa_log("Unsupported audio format '%c%c%c%c'",
+            (char) (u->stream_description.mFormatID >> 24),
+            (char) (u->stream_description.mFormatID >> 16) & 0xff,
+            (char) (u->stream_description.mFormatID >> 8) & 0xff,
+            (char) (u->stream_description.mFormatID & 0xff));
+        return -1;
+    }
+
+    /* get stream configuration */
+    size = 0;
+    err = AudioDeviceGetPropertyInfo(u->device_id, 0, section, kAudioDevicePropertyStreamConfiguration, &size, NULL);
+    if (err) {
+        pa_log("Failed to get kAudioDevicePropertyStreamConfiguration (%s).", direction_in ? "input" : "output");
+        return -1;
+    }
+
+    if (!size)
+        return 0;
+
+    buffer_list = (AudioBufferList *) pa_xmalloc(size);
+    err = AudioDeviceGetProperty(u->device_id, 0, section, kAudioDevicePropertyStreamConfiguration, &size, buffer_list);
+
+    if (!err) {
+        pa_log_debug("Sample rate: %f", u->stream_description.mSampleRate);
+        pa_log_debug("%d bytes per packet",   (unsigned int) u->stream_description.mBytesPerPacket);
+        pa_log_debug("%d frames per packet",  (unsigned int) u->stream_description.mFramesPerPacket);
+        pa_log_debug("%d bytes per frame",    (unsigned int) u->stream_description.mBytesPerFrame);
+        pa_log_debug("%d channels per frame", (unsigned int) u->stream_description.mChannelsPerFrame);
+        pa_log_debug("%d bits per channel",   (unsigned int) u->stream_description.mBitsPerChannel);
+
+        for (channel_idx = 0, i = 0; i < buffer_list->mNumberBuffers; i++) {
+            AudioBuffer *buf = buffer_list->mBuffers + i;
+
+            if (direction_in)
+                ca_device_create_source(m, buf, channel_idx);
+            else
+                ca_device_create_sink(m, buf, channel_idx);
+
+            channel_idx += buf->mNumberChannels;
+        }
+    }
+
+    pa_xfree(buffer_list);
+    return 0;
+}
+
+static void thread_func(void *userdata) {
+    struct userdata *u = userdata;
+
+    pa_assert(u);
+    pa_assert(u->module);
+    pa_assert(u->module->core);
+
+    pa_log_debug("Thread starting up");
+
+    if (u->module->core->realtime_scheduling)
+        pa_make_realtime(u->module->core->realtime_priority);
+
+    pa_thread_mq_install(&u->thread_mq);
+
+    for (;;) {
+        int ret;
+
+        ret = pa_rtpoll_run(u->rtpoll, TRUE);
+
+        if (ret < 0)
+            goto fail;
+
+        if (ret == 0)
+            goto finish;
+    }
+
+fail:
+    /* If this was no regular exit from the loop we have to continue
+     * processing messages until we received PA_MESSAGE_SHUTDOWN */
+    pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->module->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
+    pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
+
+finish:
+    pa_log_debug("Thread shutting down");
+}
+
+int pa__init(pa_module *m) {
+    OSStatus err;
+    UInt32 size, frames;
+    struct userdata *u = NULL;
+    pa_modargs *ma = NULL;
+    char tmp[64];
+    pa_card_new_data card_new_data;
+    coreaudio_sink *ca_sink;
+    coreaudio_source *ca_source;
+
+    pa_assert(m);
+
+    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+        pa_log("Failed to parse module arguments.");
+        goto fail;
+    }
+
+    u = pa_xnew0(struct userdata, 1);
+    u->module = m;
+    m->userdata = u;
+
+    if (pa_modargs_get_value_u32(ma, "device_id", (unsigned int *) &u->device_id) != 0) {
+        pa_log("Failed to parse device_id argument.");
+        goto fail;
+    }
+
+    /* get device product name */
+    size = sizeof(tmp);
+    err = AudioDeviceGetProperty(u->device_id, 0, 0, kAudioDevicePropertyDeviceName, &size, &tmp);
+    if (err) {
+        pa_log("Failed to get kAudioDevicePropertyDeviceName (err = %08x).", (int) err);
+        goto fail;
+    }
+
+    u->device_name = pa_xstrdup(tmp);
+
+    pa_card_new_data_init(&card_new_data);
+    pa_proplist_sets(card_new_data.proplist, PA_PROP_DEVICE_STRING, tmp);
+    card_new_data.driver = __FILE__;
+    pa_card_new_data_set_name(&card_new_data, tmp);
+    pa_log_info("Initializing module for CoreAudio device '%s' (id %d)", tmp, (unsigned int) u->device_id);
+
+    /* get device vendor name (may fail) */
+    size = sizeof(tmp);
+    err = AudioDeviceGetProperty(u->device_id, 0, 0, kAudioDevicePropertyDeviceManufacturer, &size, &tmp);
+    if (!err)
+        u->vendor_name = pa_xstrdup(tmp);
+
+    /* create the card object */
+    u->card = pa_card_new(m->core, &card_new_data);
+    if (!u->card) {
+        pa_log("Unable to create card.\n");
+        goto fail;
+    }
+
+    pa_card_new_data_done(&card_new_data);
+    u->card->userdata = u;
+
+    u->rtpoll = pa_rtpoll_new();
+    pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
+    u->async_msgq = pa_asyncmsgq_new(0);
+    pa_rtpoll_item_new_asyncmsgq_read(u->rtpoll, PA_RTPOLL_EARLY-1, u->async_msgq);
+
+    PA_LLIST_HEAD_INIT(coreaudio_sink, u->sinks);
+
+    /* create sinks */
+    ca_device_create_streams(m, FALSE);
+
+    /* create sources */
+    ca_device_create_streams(m, TRUE);
+
+    /* create the message thread */
+    if (!(u->thread = pa_thread_new(thread_func, u))) {
+        pa_log("Failed to create thread.");
+        goto fail;
+    }
+
+    /* register notification callback for stream format changes */
+    AudioDeviceAddPropertyListener(u->device_id, 0, 0, kAudioDevicePropertyStreamFormat, ca_stream_format_changed, u);
+
+    /* set number of frames in IOProc */
+    frames = DEFAULT_FRAMES_PER_IOPROC;
+    pa_modargs_get_value_u32(ma, "ioproc_frames", (unsigned int *) &frames);
+
+    AudioDeviceSetProperty(u->device_id, NULL, 0, 0, kAudioDevicePropertyBufferFrameSize, sizeof(frames), &frames);
+    pa_log_debug("%u frames per IOProc\n", (unsigned int) frames);
+
+    /* create one ioproc for both directions */
+    err = AudioDeviceCreateIOProcID(u->device_id, io_render_proc, u, &u->proc_id);
+    if (err) {
+        pa_log("AudioDeviceCreateIOProcID() failed (err = %08x\n).", (int) err);
+        goto fail;
+    }
+
+    for (ca_sink = u->sinks; ca_sink; ca_sink = ca_sink->next)
+        pa_sink_put(ca_sink->pa_sink);
+
+    for (ca_source = u->sources; ca_source; ca_source = ca_source->next)
+        pa_source_put(ca_source->pa_source);
+
+    pa_modargs_free(ma);
+
+    return 0;
+
+fail:
+    if (u)
+        pa__done(m);
+
+    if (ma)
+        pa_modargs_free(ma);
+
+    return -1;
+}
+
+void pa__done(pa_module *m) {
+    struct userdata *u;
+    coreaudio_sink *ca_sink;
+    coreaudio_source *ca_source;
+
+    pa_assert(m);
+
+    u = m->userdata;
+    pa_assert(u);
+
+    /* unlink sinks */
+    for (ca_sink = u->sinks; ca_sink; ca_sink = ca_sink->next)
+        if (ca_sink->pa_sink)
+            pa_sink_unlink(ca_sink->pa_sink);
+
+    /* unlink sources */
+    for (ca_source = u->sources; ca_source; ca_source = ca_source->next)
+        if (ca_source->pa_source)
+            pa_source_unlink(ca_source->pa_source);
+
+    if (u->thread) {
+        pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
+        pa_thread_free(u->thread);
+        pa_thread_mq_done(&u->thread_mq);
+        pa_asyncmsgq_unref(u->async_msgq);
+    }
+
+    /* free sinks */
+    for (ca_sink = u->sinks; ca_sink;) {
+        coreaudio_sink *next = ca_sink->next;
+
+        if (ca_sink->pa_sink)
+            pa_sink_unref(ca_sink->pa_sink);
+
+        pa_xfree(ca_sink->name);
+        pa_xfree(ca_sink);
+        ca_sink = next;
+    }
+
+    /* free sources */
+    for (ca_source = u->sources; ca_source;) {
+        coreaudio_source *next = ca_source->next;
+
+        if (ca_source->pa_source)
+            pa_source_unref(ca_source->pa_source);
+
+        pa_xfree(ca_source->name);
+        pa_xfree(ca_source);
+        ca_source = next;
+    }
+
+    if (u->proc_id) {
+        AudioDeviceStop(u->device_id, u->proc_id);
+        AudioDeviceDestroyIOProcID(u->device_id, u->proc_id);
+    }
+
+    AudioDeviceRemovePropertyListener(u->device_id, 0, 0, kAudioDevicePropertyStreamFormat, ca_stream_format_changed);
+
+    pa_xfree(u->device_name);
+    pa_xfree(u->vendor_name);
+    pa_rtpoll_free(u->rtpoll);
+    pa_card_free(u->card);
+
+    pa_xfree(u);
+}