Import sources for libao driver (unfinished, based on dummy driver)

drivers/ao/SCsub

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+Import('env')
+
+env.add_source_files(env.drivers_sources,"*.cpp")
+
+Export('env')

drivers/ao/audio_driver_ao.cpp

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+/*************************************************************************/
+/*  audio_driver_ao.cpp                                                  */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                    http://www.godotengine.org                         */
+/*************************************************************************/
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                 */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "audio_driver_ao.h"
+
+#include "globals.h"
+#include "os/os.h"
+
+Error AudioDriverAO::init() {
+
+	active = false;
+	thread_exited = false;
+	exit_thread = false;
+	pcm_open = false;
+	samples_in = NULL;
+
+	mix_rate = 44100;
+	output_format = OUTPUT_STEREO;
+	channels = 2;
+
+	int latency = GLOBAL_DEF("audio/output_latency",25);
+	buffer_size = nearest_power_of_2( latency * mix_rate / 1000 );
+
+	samples_in = memnew_arr(int32_t, buffer_size*channels);
+
+	mutex = Mutex::create();
+	thread = Thread::create(AudioDriverAO::thread_func, this);
+
+	return OK;
+};
+
+void AudioDriverAO::thread_func(void* p_udata) {
+
+	AudioDriverAO* ad = (AudioDriverAO*)p_udata;
+
+	uint64_t usdelay = (ad->buffer_size / float(ad->mix_rate))*1000000;
+
+	while (!ad->exit_thread) {
+		if (!ad->active) {
+
+		} else {
+			ad->lock();
+			ad->audio_server_process(ad->buffer_size, ad->samples_in);
+			ad->unlock();
+
+		};
+
+		OS::get_singleton()->delay_usec(usdelay);
+	};
+
+	ad->thread_exited=true;
+};
+
+void AudioDriverAO::start() {
+	active = true;
+};
+
+int AudioDriverAO::get_mix_rate() const {
+	return mix_rate;
+};
+
+AudioDriverSW::OutputFormat AudioDriverAO::get_output_format() const {
+	return output_format;
+};
+
+void AudioDriverAO::lock() {
+	if (!thread || !mutex)
+		return;
+	mutex->lock();
+};
+
+void AudioDriverAO::unlock() {
+	if (!thread || !mutex)
+		return;
+	mutex->unlock();
+};
+
+void AudioDriverAO::finish() {
+	if (!thread)
+		return;
+
+	exit_thread = true;
+	Thread::wait_to_finish(thread);
+
+	if (samples_in) {
+		memdelete_arr(samples_in);
+	};
+
+	memdelete(thread);
+	if (mutex)
+		memdelete(mutex);
+	thread = NULL;
+};
+
+AudioDriverAO::AudioDriverAO() {
+
+	mutex = NULL;
+	thread = NULL;
+
+};
+
+AudioDriverAO::~AudioDriverAO() {
+
+};

drivers/ao/audio_driver_ao.h

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+/*************************************************************************/
+/*  audio_driver_ao.h                                                    */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                    http://www.godotengine.org                         */
+/*************************************************************************/
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                 */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "servers/audio/audio_server_sw.h"
+
+#ifdef AO_ENABLED
+
+#include "core/os/thread.h"
+#include "core/os/mutex.h"
+
+#include <ao/ao.h>
+
+class AudioDriverAO : public AudioDriverSW {
+
+	Thread* thread;
+	Mutex* mutex;
+
+	int32_t* samples_in;
+
+	static void thread_func(void* p_udata);
+	int buffer_size;
+
+	unsigned int mix_rate;
+	OutputFormat output_format;
+
+	int channels;
+
+	bool active;
+	bool thread_exited;
+	mutable bool exit_thread;
+	bool pcm_open;
+
+public:
+
+	const char* get_name() const {
+		return "libao";
+	};
+
+	virtual Error init();
+	virtual void start();
+	virtual int get_mix_rate() const;
+	virtual OutputFormat get_output_format() const;
+	virtual void lock();
+	virtual void unlock();
+	virtual void finish();
+
+	AudioDriverAO();
+	~AudioDriverAO();
+};
+
+#endif