Patch #1971285: "Nintendo Wii port"

svn-id: r32547

1 files changed, 133 insertions, 0 deletions

diff --git a/backends/platform/wii/osystem_sfx.cpp b/backends/platform/wii/osystem_sfx.cpp
new file mode 100644
index 0000000000..16b2f3b055
--- /dev/null
+++ b/backends/platform/wii/osystem_sfx.cpp
@@ -0,0 +1,133 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program 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 General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <malloc.h>
+
+#include "osystem.h"
+
+#define SFX_THREAD_STACKSIZE (1024 * 128)
+#define SFX_THREAD_PRIO 80
+#define SFX_THREAD_FRAG_SIZE 4096
+
+static lwpq_t sfx_queue;
+static lwp_t sfx_thread;
+static u8 *sfx_stack;
+static bool sfx_thread_running = false;
+static bool sfx_thread_quit = false;
+
+static u8 sb = 0;
+static u8 *sound_buffer[2];
+
+static OSystem_Wii::SoundProc sound_proc = NULL;
+static void *proc_param = NULL;
+
+static void audio_switch_buffers() {
+	AUDIO_StopDMA();
+	AUDIO_InitDMA((u32) sound_buffer[sb], SFX_THREAD_FRAG_SIZE);
+	AUDIO_StartDMA();
+
+	LWP_ThreadSignal(sfx_queue);
+}
+
+static void * sfx_thread_func(void *arg) {
+	u8 next_sb;
+
+	while (true) {
+		LWP_ThreadSleep(sfx_queue);
+
+		if (sfx_thread_quit)
+			break;
+
+		next_sb = sb ^ 1;
+		sound_proc(proc_param, sound_buffer[next_sb], SFX_THREAD_FRAG_SIZE);
+		DCFlushRange(sound_buffer[next_sb], SFX_THREAD_FRAG_SIZE);
+
+		sb = next_sb;
+	}
+
+	return NULL;
+}
+
+void OSystem_Wii::initSfx() {
+	sfx_thread_running = false;
+	sfx_thread_quit = false;
+
+	sfx_stack = (u8 *) memalign(32, SFX_THREAD_STACKSIZE);
+	memset(sfx_stack, 0, SFX_THREAD_STACKSIZE);
+
+	LWP_InitQueue(&sfx_queue);
+
+	s32 res = LWP_CreateThread(&sfx_thread, sfx_thread_func, NULL, sfx_stack,
+								SFX_THREAD_STACKSIZE, SFX_THREAD_PRIO);
+
+	if (res) {
+		printf("ERROR creating sfx thread: %d\n", res);
+		LWP_CloseQueue(sfx_queue);
+		return;
+	}
+
+	sfx_thread_running = true;
+
+	sound_buffer[0] = (u8 *) memalign(32, SFX_THREAD_FRAG_SIZE);
+	sound_buffer[1] = (u8 *) memalign(32, SFX_THREAD_FRAG_SIZE);
+
+	memset(sound_buffer[0], 0, SFX_THREAD_FRAG_SIZE);
+	memset(sound_buffer[1], 0, SFX_THREAD_FRAG_SIZE);
+
+	DCFlushRange(sound_buffer[0], SFX_THREAD_FRAG_SIZE);
+	DCFlushRange(sound_buffer[1], SFX_THREAD_FRAG_SIZE);
+
+	sound_proc = Audio::Mixer::mixCallback;
+	proc_param = _mixer;
+
+	_mixer->setReady(true);
+
+	AUDIO_SetDSPSampleRate(AI_SAMPLERATE_48KHZ);
+	AUDIO_RegisterDMACallback(audio_switch_buffers);
+
+	audio_switch_buffers();
+}
+
+void OSystem_Wii::deinitSfx() {
+	if (_mixer)
+		_mixer->setReady(false);
+
+	AUDIO_StopDMA();
+	AUDIO_RegisterDMACallback(NULL);
+
+	if (sfx_thread_running) {
+		sfx_thread_quit = true;
+		LWP_ThreadBroadcast(sfx_queue);
+
+		LWP_JoinThread(sfx_thread, NULL);
+		LWP_CloseQueue(sfx_queue);
+
+		sfx_thread_running = false;
+
+		free(sound_buffer[0]);
+		free(sound_buffer[1]);
+	}
+}
+
+int OSystem_Wii::getOutputSampleRate() const {
+	return 48000;
+}
+