love2d.love/src/modules/audio/wrap_Audio.cpp

/**
* Copyright (c) 2006-2011 LOVE Development Team
*
* This software is provided 'as-is', without any express or implied
* warranty.  In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
*    claim that you wrote the original software. If you use this software
*    in a product, an acknowledgment in the product documentation would be
*    appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
*    misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
**/

// LOVE
#include "wrap_Audio.h"

#include "openal/Audio.h"
#include "null/Audio.h"

#include <scripts/audio.lua.h>

#include <common/runtime.h>

namespace love
{
namespace audio
{
	static Audio * instance = 0;

	int w_getNumSources(lua_State * L)
	{
		lua_pushinteger(L, instance->getNumSources());
		return 1;
	}

	int w_newSource1(lua_State * L)
	{
		Source * t = 0;

		if (luax_istype(L, 1, SOUND_SOUND_DATA_T))
			t = instance->newSource(luax_totype<love::sound::SoundData>(L, 1, "SoundData", SOUND_SOUND_DATA_T));
		else if (luax_istype(L, 1, SOUND_DECODER_T))
			t = instance->newSource(luax_totype<love::sound::Decoder>(L, 1, "Decoder", SOUND_DECODER_T));

		if (t)
		{
			luax_newtype(L, "Source", AUDIO_SOURCE_T, (void*)t);
			return 1;
		}
		else
			return luaL_error(L, "No matching overload");

		return 0;
	}

	int w_play(lua_State * L)
	{
		Source * s = luax_checksource(L, 1);
		instance->play(s);
		return 0;
	}

	int w_stop(lua_State * L)
	{
		if (lua_gettop(L) == 0)
		{
			instance->stop();
		}
		else
		{
			Source * s = luax_checksource(L, 1);
			s->stop();
		}
		return 0;
	}

	int w_pause(lua_State * L)
	{
		if (lua_gettop(L) == 0)
		{
			instance->pause();
		}
		else
		{
			Source * s = luax_checksource(L, 1);
			s->pause();
		}

		return 0;
	}

	int w_resume(lua_State * L)
	{
		if (lua_gettop(L) == 0)
		{
			instance->resume();
		}
		else
		{
			Source * s = luax_checksource(L, 1);
			s->resume();
		}
		return 0;
	}

	int w_rewind(lua_State * L)
	{
		if (lua_gettop(L) == 0)
		{
			instance->rewind();
		}
		else
		{
			Source * s = luax_checksource(L, 1);
			s->rewind();
		}
		return 0;
	}

	int w_setVolume(lua_State * L)
	{
		float v = (float)luaL_checknumber(L, 1);
		instance->setVolume(v);
		return 0;
	}

	int w_getVolume(lua_State * L)
	{
		lua_pushnumber(L, instance->getVolume());
		return 1;
	}

	int w_setPosition(lua_State * L)
	{
		float v[3];
		v[0] = (float)luaL_checknumber(L, 1);
		v[1] = (float)luaL_checknumber(L, 2);
		v[2] = (float)luaL_checknumber(L, 3);
		instance->setPosition(v);
		return 0;
	}

	int w_getPosition(lua_State * L)
	{
		float v[3];
		instance->getPosition(v);
		lua_pushnumber(L, v[0]);
		lua_pushnumber(L, v[1]);
		lua_pushnumber(L, v[2]);
		return 3;
	}

	int w_setOrientation(lua_State * L)
	{
		float v[6];
		v[0] = (float)luaL_checknumber(L, 1);
		v[1] = (float)luaL_checknumber(L, 2);
		v[2] = (float)luaL_checknumber(L, 3);
		v[3] = (float)luaL_checknumber(L, 4);
		v[4] = (float)luaL_checknumber(L, 5);
		v[5] = (float)luaL_checknumber(L, 6);
		instance->setOrientation(v);
		return 0;
	}

	int w_getOrientation(lua_State * L)
	{
		float v[6];
		instance->getOrientation(v);
		lua_pushnumber(L, v[0]);
		lua_pushnumber(L, v[1]);
		lua_pushnumber(L, v[2]);
		lua_pushnumber(L, v[3]);
		lua_pushnumber(L, v[4]);
		lua_pushnumber(L, v[5]);
		return 6;
	}

	int w_setVelocity(lua_State * L)
	{
		float v[3];
		v[0] = (float)luaL_checknumber(L, 1);
		v[1] = (float)luaL_checknumber(L, 2);
		v[2] = (float)luaL_checknumber(L, 3);
		instance->setVelocity(v);
		return 0;
	}

	int w_getVelocity(lua_State * L)
	{
		float v[3];
		instance->getVelocity(v);
		lua_pushnumber(L, v[0]);
		lua_pushnumber(L, v[1]);
		lua_pushnumber(L, v[2]);
		return 3;
	}

	int w_record(lua_State *)
	{
		instance->record();
		return 0;
	}

	int w_getRecordedData(lua_State * L)
	{
		love::sound::SoundData * sd = instance->getRecordedData();
		if (!sd)
			lua_pushnil(L);
		else
			luax_newtype(L, "SoundData", SOUND_SOUND_DATA_T, (void*)sd);
		return 1;
	}

	int w_stopRecording(lua_State * L)
	{
		if (luax_optboolean(L, 1, true))
		{
			love::sound::SoundData * sd = instance->stopRecording(true);
			if (!sd) lua_pushnil(L);
			else luax_newtype(L, "SoundData", SOUND_SOUND_DATA_T, (void*)sd);
			return 1;
		}
		instance->stopRecording(false);
		return 0;
	}

	int w_canRecord(lua_State * L) {
		luax_pushboolean(L, instance->canRecord());
		return 1;
	}
	
	int w_setDistanceModel(lua_State * L)
	{
		const char *modelStr = luaL_checkstring(L, 1);
		Audio::DistanceModel distanceModel;
		if (!Audio::getConstant(modelStr, distanceModel))
			return luaL_error(L, "Invalid distance model: %s", modelStr);
		instance->setDistanceModel(distanceModel);
		return 0;
	}

	int w_getDistanceModel(lua_State * L)
	{
		Audio::DistanceModel distanceModel = instance->getDistanceModel();
		const char *modelStr;
		if (!Audio::getConstant(distanceModel, modelStr))
			return 0;
		lua_pushstring(L, modelStr);
		return 1;
	}

	// List of functions to wrap.
	static const luaL_Reg functions[] = {
		{ "getNumSources", w_getNumSources },
		{ "newSource1", w_newSource1 },
		{ "play", w_play },
		{ "stop", w_stop },
		{ "pause", w_pause },
		{ "resume", w_resume },
		{ "rewind", w_rewind },
		{ "setVolume", w_setVolume },
		{ "getVolume", w_getVolume },
		{ "setPosition", w_setPosition },
		{ "getPosition", w_getPosition },
		{ "setOrientation", w_setOrientation },
		{ "getOrientation", w_getOrientation },
		{ "setVelocity", w_setVelocity },
		{ "getVelocity", w_getVelocity },
		/*{ "record", w_record },
		{ "getRecordedData", w_getRecordedData },
		{ "stopRecording", w_stopRecording },*/
		{ "setDistanceModel", w_setDistanceModel },
		{ "getDistanceModel", w_getDistanceModel },
		{ 0, 0 }
	};

	static const lua_CFunction types[] = {
		luaopen_source,
		0
	};

	extern "C" int luaopen_love_audio(lua_State * L)
	{
		if (instance == 0)
		{
			// Try OpenAL first.
			try
			{
				instance = new love::audio::openal::Audio();
			}
			catch (love::Exception & e)
			{
				std::cout << e.what() << std::endl;
			}
		}
		else
			instance->retain();

		if (instance == 0)
		{
			// Fall back to nullaudio.
			try
			{
				instance = new love::audio::null::Audio();
			}
			catch (love::Exception & e)
			{
				std::cout << e.what() << std::endl;
			}
		}

		if (instance == 0)
			return luaL_error(L, "Could not open any audio module.");

		WrappedModule w;
		w.module = instance;
		w.name = "audio";
		w.flags = MODULE_T;
		w.functions = functions;
		w.types = types;

		int n = luax_register_module(L, w);

		if (luaL_loadbuffer(L, (const char *)audio_lua, sizeof(audio_lua), "audio.lua") == 0)
			lua_call(L, 0, 0);

		return n;
	}

} // audio
} // love