GODOT IS OPEN SOURCE

3 files changed, 356 insertions, 0 deletions

diff --git a/drivers/alsa/SCsub b/drivers/alsa/SCsub
new file mode 100644
index 0000000000..bcd231579c
--- /dev/null
+++ b/drivers/alsa/SCsub
@@ -0,0 +1,7 @@
+Import('env')
+
+env.add_source_files(env.drivers_sources,"*.cpp")
+
+Export('env')
+
+
diff --git a/drivers/alsa/audio_driver_alsa.cpp b/drivers/alsa/audio_driver_alsa.cpp
new file mode 100644
index 0000000000..9d9a856376
--- /dev/null
+++ b/drivers/alsa/audio_driver_alsa.cpp
@@ -0,0 +1,270 @@
+/*************************************************************************/
+/*  audio_driver_alsa.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_alsa.h"
+
+#ifdef ALSA_ENABLED
+
+#include <errno.h>
+#include "globals.h"
+
+
+
+
+Error AudioDriverALSA::init() {
+
+	active=false;
+	thread_exited=false;
+	exit_thread=false;
+	pcm_open = false;
+	samples_in = NULL;
+	samples_out = NULL;
+
+	mix_rate = 44100;
+	output_format = OUTPUT_STEREO;
+	channels = 2;
+
+
+	int                  status;
+	snd_pcm_hw_params_t *hwparams;
+	snd_pcm_sw_params_t *swparams;
+
+#define CHECK_FAIL(m_cond)\
+	if (m_cond) {\
+		fprintf(stderr,"ALSA ERR: %s\n",snd_strerror(status));\
+		snd_pcm_close(pcm_handle);\
+		ERR_FAIL_COND_V(m_cond,ERR_CANT_OPEN);\
+	}
+
+	//todo, add
+	//6 chans - "plug:surround51"
+	//4 chans - "plug:surround40";
+
+	status = snd_pcm_open(&pcm_handle, "default", SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
+
+	ERR_FAIL_COND_V( status<0, ERR_CANT_OPEN );
+
+	snd_pcm_hw_params_alloca(&hwparams);
+	status = snd_pcm_hw_params_any(pcm_handle, hwparams);
+
+	CHECK_FAIL( status<0 );
+
+	status = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED);
+
+	CHECK_FAIL( status<0 );
+
+	//not interested in anything else
+	status = snd_pcm_hw_params_set_format(pcm_handle, hwparams, SND_PCM_FORMAT_S16_LE);
+
+	CHECK_FAIL( status<0 );
+
+	//todo: support 4 and 6
+	status = snd_pcm_hw_params_set_channels(pcm_handle, hwparams, 2);
+
+	CHECK_FAIL( status<0 );
+
+	status = snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &mix_rate, NULL);
+
+
+	CHECK_FAIL( status<0 );
+
+	int latency = GLOBAL_DEF("audio/output_latency",25);
+	buffer_size = nearest_power_of_2( latency * mix_rate / 1000 );
+
+	status = snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams, &buffer_size, NULL);
+
+
+	CHECK_FAIL( status<0 );
+
+	unsigned int periods=2;
+	status = snd_pcm_hw_params_set_periods_near(pcm_handle, hwparams, &periods, NULL);
+
+	CHECK_FAIL( status<0 );
+
+	status = snd_pcm_hw_params(pcm_handle,hwparams);
+
+	CHECK_FAIL( status<0 );
+
+	//snd_pcm_hw_params_free(&hwparams);
+
+
+	snd_pcm_sw_params_alloca(&swparams);
+	status = snd_pcm_sw_params_current(pcm_handle, swparams);
+	CHECK_FAIL( status<0 );
+
+	status = snd_pcm_sw_params_set_avail_min(pcm_handle, swparams, buffer_size);
+
+	CHECK_FAIL( status<0 );
+
+	status = snd_pcm_sw_params_set_start_threshold(pcm_handle, swparams, 1);
+
+	CHECK_FAIL( status<0 );
+
+	status = snd_pcm_sw_params(pcm_handle, swparams);
+
+	CHECK_FAIL( status<0 );
+
+	samples_in = memnew_arr(int32_t, buffer_size*channels);
+	samples_out = memnew_arr(int16_t, buffer_size*channels);
+
+	snd_pcm_nonblock(pcm_handle, 0);
+
+	mutex=Mutex::create();
+	thread = Thread::create(AudioDriverALSA::thread_func, this);
+
+	return OK;
+};
+
+void AudioDriverALSA::thread_func(void* p_udata) {
+
+	AudioDriverALSA* ad = (AudioDriverALSA*)p_udata;
+
+
+	while (!ad->exit_thread) {
+
+
+		if (!ad->active) {
+
+			for (unsigned int i=0; i < ad->buffer_size*ad->channels; i++) {
+
+				ad->samples_out[i] = 0;
+			};
+		} else {
+
+			ad->lock();
+
+			ad->audio_server_process(ad->buffer_size, ad->samples_in);
+
+			ad->unlock();
+
+			for(unsigned int i=0;i<ad->buffer_size*ad->channels;i++) {
+
+				ad->samples_out[i]=ad->samples_in[i]>>16;
+			}
+		};
+
+
+		int todo = ad->buffer_size; // * ad->channels * 2;
+		int total = 0;
+
+		while (todo) {
+
+			if (ad->exit_thread)
+				break;
+			uint8_t* src = (uint8_t*)ad->samples_out;
+			int wrote = snd_pcm_writei(ad->pcm_handle, (void*)(src + (total*ad->channels)), todo);
+
+			if (wrote < 0) {
+				if (ad->exit_thread)
+					break;
+
+				if ( wrote == -EAGAIN ) {
+					usleep(1000); //can't write yet (though this is blocking..)
+					continue;
+				}
+				wrote = snd_pcm_recover(ad->pcm_handle, wrote, 0);
+				if ( wrote < 0 ) {
+					//absolute fail
+					fprintf(stderr, "ALSA failed and can't recover: %s\n", snd_strerror(wrote));
+					ad->active=false;
+					ad->exit_thread=true;
+					break;
+				}
+				continue;
+			};
+			total += wrote;
+			todo -= wrote;
+
+		};
+	};
+
+	ad->thread_exited=true;
+
+};
+
+void AudioDriverALSA::start() {
+
+	active = true;
+};
+
+int AudioDriverALSA::get_mix_rate() const {
+
+	return mix_rate;
+};
+
+AudioDriverSW::OutputFormat AudioDriverALSA::get_output_format() const {
+
+	return output_format;
+};
+void AudioDriverALSA::lock() {
+
+	if (!thread || !mutex)
+		return;
+	mutex->lock();
+};
+void AudioDriverALSA::unlock() {
+
+	if (!thread || !mutex)
+		return;
+	mutex->unlock();
+};
+
+void AudioDriverALSA::finish() {
+
+	if (!thread)
+		return;
+
+	exit_thread = true;
+	Thread::wait_to_finish(thread);
+
+	if (pcm_open)
+		snd_pcm_close(pcm_handle);
+
+	if (samples_in) {
+		memdelete_arr(samples_in);
+		memdelete_arr(samples_out);
+	};
+
+	memdelete(thread);
+	if (mutex)
+		memdelete(mutex);
+	thread = NULL;
+};
+
+AudioDriverALSA::AudioDriverALSA() {
+
+	mutex = NULL;
+	thread=NULL;
+	pcm_handle=NULL;
+};
+
+AudioDriverALSA::~AudioDriverALSA() {
+
+};
+
+#endif
diff --git a/drivers/alsa/audio_driver_alsa.h b/drivers/alsa/audio_driver_alsa.h
new file mode 100644
index 0000000000..86cdde6215
--- /dev/null
+++ b/drivers/alsa/audio_driver_alsa.h
@@ -0,0 +1,79 @@
+/*************************************************************************/
+/*  audio_driver_alsa.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 ALSA_ENABLED
+
+#include "core/os/thread.h"
+#include "core/os/mutex.h"
+
+#include <alsa/asoundlib.h>
+
+class AudioDriverALSA : public AudioDriverSW {
+
+	Thread* thread;
+	Mutex* mutex;
+
+	snd_pcm_t* pcm_handle;
+
+	int32_t* samples_in;
+	int16_t* samples_out;
+
+	static void thread_func(void* p_udata);
+
+	unsigned int mix_rate;
+	OutputFormat output_format;
+
+	snd_pcm_uframes_t buffer_size;
+	int channels;
+
+	bool active;
+	bool thread_exited;
+	mutable bool exit_thread;
+	bool pcm_open;
+
+public:
+
+	const char* get_name() const {
+		return "ALSA";
+	};
+
+	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();
+
+	AudioDriverALSA();
+	~AudioDriverALSA();
+};
+
+#endif