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/* 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.
*
*/
#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()
:
_stereoMixBuffer(0) {
}
SymbianSdlMixerManager::~SymbianSdlMixerManager() {
delete[] _stereoMixBuffer;
}
void SymbianSdlMixerManager::startAudio() {
// Need to create mixbuffer for stereo mix to downmix
if (_obtained.channels != 2) {
_stereoMixBuffer = new byte [_obtained.size * 2]; // * 2 for stereo values
}
SdlMixerManager::startAudio();
}
void SymbianSdlMixerManager::callbackHandler(byte *samples, int len) {
assert(_mixer);
#if defined(S60) && !defined(S60V3)
// If not stereo then we need to downmix
if (_obtained.channels != 2) {
_mixer->mixCallback(_stereoMixBuffer, len * 2);
int16 *bitmixDst = (int16 *)samples;
int16 *bitmixSrc = (int16 *)_stereoMixBuffer;
for (int loop = len / 2; loop >= 0; loop --) {
*bitmixDst = (*bitmixSrc + *(bitmixSrc + 1)) >> 1;
bitmixDst++;
bitmixSrc += 2;
}
} else
#else
_mixer->mixCallback(samples, len);
#endif
}
#endif
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