100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
/*
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* $Id$
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*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* Copyright 2009-2011 Jörg Hermann Müller
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*
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* This file is part of AudaSpace.
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*
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* Audaspace is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* AudaSpace is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Audaspace; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file audaspace/SDL/AUD_SDLDevice.cpp
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* \ingroup audsdl
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*/
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#include "AUD_SDLDevice.h"
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#include "AUD_IReader.h"
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void AUD_SDLDevice::SDL_mix(void *data, Uint8* buffer, int length)
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{
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AUD_SDLDevice* device = (AUD_SDLDevice*)data;
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device->mix((data_t*)buffer,length/AUD_DEVICE_SAMPLE_SIZE(device->m_specs));
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}
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static const char* open_error = "AUD_SDLDevice: Device couldn't be opened.";
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static const char* format_error = "AUD_SDLDevice: Obtained unsupported sample "
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"format.";
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AUD_SDLDevice::AUD_SDLDevice(AUD_DeviceSpecs specs, int buffersize)
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{
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if(specs.channels == AUD_CHANNELS_INVALID)
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specs.channels = AUD_CHANNELS_STEREO;
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if(specs.format == AUD_FORMAT_INVALID)
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specs.format = AUD_FORMAT_S16;
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if(specs.rate == AUD_RATE_INVALID)
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specs.rate = AUD_RATE_44100;
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m_specs = specs;
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SDL_AudioSpec format, obtained;
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format.freq = m_specs.rate;
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if(m_specs.format == AUD_FORMAT_U8)
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format.format = AUDIO_U8;
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else
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format.format = AUDIO_S16SYS;
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format.channels = m_specs.channels;
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format.samples = buffersize;
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format.callback = AUD_SDLDevice::SDL_mix;
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format.userdata = this;
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if(SDL_OpenAudio(&format, &obtained) != 0)
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AUD_THROW(AUD_ERROR_SDL, open_error);
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m_specs.rate = (AUD_SampleRate)obtained.freq;
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m_specs.channels = (AUD_Channels)obtained.channels;
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if(obtained.format == AUDIO_U8)
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m_specs.format = AUD_FORMAT_U8;
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else if(obtained.format == AUDIO_S16LSB || obtained.format == AUDIO_S16MSB)
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m_specs.format = AUD_FORMAT_S16;
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else
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{
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SDL_CloseAudio();
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AUD_THROW(AUD_ERROR_SDL, format_error);
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}
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create();
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}
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AUD_SDLDevice::~AUD_SDLDevice()
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{
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lock();
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SDL_CloseAudio();
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unlock();
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destroy();
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}
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void AUD_SDLDevice::playing(bool playing)
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{
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SDL_PauseAudio(playing ? 0 : 1);
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}
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