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author | Alejandro Marzini | 2010-06-26 23:05:37 +0000 |
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committer | Alejandro Marzini | 2010-06-26 23:05:37 +0000 |
commit | 62ac3982aa5ba81a29ff4bf5b1ac1e3d2647eb9b (patch) | |
tree | cea9f5a28bede5139193fe7738cfe173b4051e80 /backends/mixer/symbiansdl/symbiansdl-mixer.cpp | |
parent | 32b5f5e4ae80a498cf09577765ac7bde6686a079 (diff) | |
download | scummvm-rg350-62ac3982aa5ba81a29ff4bf5b1ac1e3d2647eb9b.tar.gz scummvm-rg350-62ac3982aa5ba81a29ff4bf5b1ac1e3d2647eb9b.tar.bz2 scummvm-rg350-62ac3982aa5ba81a29ff4bf5b1ac1e3d2647eb9b.zip |
Modularized Symbian port.
svn-id: r50356
Diffstat (limited to 'backends/mixer/symbiansdl/symbiansdl-mixer.cpp')
-rw-r--r-- | backends/mixer/symbiansdl/symbiansdl-mixer.cpp | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/backends/mixer/symbiansdl/symbiansdl-mixer.cpp b/backends/mixer/symbiansdl/symbiansdl-mixer.cpp new file mode 100644 index 0000000000..0cbae85cb9 --- /dev/null +++ b/backends/mixer/symbiansdl/symbiansdl-mixer.cpp @@ -0,0 +1,102 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +#ifdef __SYMBIAN32__ + +#include "backends/mixer/symbiansdl/symbiansdl-mixer.h" +#include "common/system.h" + +#ifdef SAMPLES_PER_SEC_8000 // the GreanSymbianMMP format cannot handle values for defines :( + #define SAMPLES_PER_SEC 8000 +#else + #define SAMPLES_PER_SEC 16000 +#endif + +SymbianSdlMixerManager::SymbianSdlMixerManager() + : + _stereo_mix_buffer(0) { + +} + +SymbianSdlMixerManager::~SymbianSdlMixerManager() { + delete[] _stereo_mix_buffer; +} + +void SymbianSdlMixerManager::init() { + // Start SDL Audio subsystem + if (SDL_InitSubSystem(SDL_INIT_AUDIO) == -1) { + error("Could not initialize SDL: %s", SDL_GetError()); + } + + // Get the desired audio specs + SDL_AudioSpec desired = getAudioSpec(); + + // Start SDL audio with the desired specs + if (SDL_OpenAudio(&desired, &_obtainedRate) != 0) { + warning("Could not open audio device: %s", SDL_GetError()); + + _mixer = new Audio::MixerImpl(g_system, desired.freq); + assert(_mixer); + _mixer->setReady(false); + } else { + debug(1, "Output sample rate: %d Hz", _obtainedRate.freq); + + _channels = _obtainedRate.channels; + + // Need to create mixbuffer for stereo mix to downmix + if (_channels != 2) { + _stereo_mix_buffer = new byte [_obtainedRate.size * 2]; // * 2 for stereo values + } + + _mixer = new Audio::MixerImpl(g_system, _obtainedRate.freq); + assert(_mixer); + _mixer->setReady(true); + + startAudio(); + } +} + +void SymbianSdlMixerManager::callbackHandler(byte *samples, int len) { +#if defined (S60) && !defined(S60V3) + // If not stereo then we need to downmix + if (_mixer->_channels != 2) { + _mixer->mixCallback(_stereo_mix_buffer, len * 2); + + int16 *bitmixDst = (int16 *)samples; + int16 *bitmixSrc = (int16 *)_stereo_mix_buffer; + + for (int loop = len / 2; loop >= 0; loop --) { + *bitmixDst = (*bitmixSrc + *(bitmixSrc + 1)) >> 1; + bitmixDst++; + bitmixSrc += 2; + } + } else +#else + _mixer->mixCallback(samples, len); +#endif +} + +#endif + |