forked from bartvdbraak/blender
fcc68a02e9
Historically blender had an audio sample rate of 44.1 kHz as default which is mostly popular because it's the sample rate of audio CDs. Audaspace kept using this default from the pre 2.5 era. It was about time to change to 48 kHz, which is a more widespread standard nowadays, especially in video. It is the recommended sampling rate of the Audio Engineering Society. Further reading: https://en.wikipedia.org/wiki/44,100_Hz#Status
98 lines
2.6 KiB
C++
98 lines
2.6 KiB
C++
/*
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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_48000;
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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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