mirror of
https://github.com/libretro/scummvm.git
synced 2025-01-10 03:40:25 +00:00
0da18320af
Audio mixer is supporting fading and pan animation Added support for skipping speech by pressing Return Added proper support for ambient sounds Added more code to the dialogue menu Added tooltips to the Spinner Fixed calculation of volume and pan of walk steps Code cleanup & formatting
133 lines
3.3 KiB
C++
133 lines
3.3 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "bladerunner/aud_stream.h"
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#include "bladerunner/audio_player.h"
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#include "common/util.h"
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namespace BladeRunner {
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AudStream::AudStream(byte *data) : _cache(nullptr) {
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init(data);
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}
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AudStream::AudStream(AudioCache *cache, int32 hash)
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: _cache(cache), _hash(hash) {
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_cache->incRef(_hash);
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init(_cache->findByHash(_hash));
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}
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void AudStream::init(byte *data) {
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_data = data;
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_frequency = READ_LE_UINT16(_data);
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_size = READ_LE_UINT32(_data + 2);
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_sizeDecompressed = READ_LE_UINT32(_data + 6);
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_flags = *(_data + 10);
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_compressionType = *(_data + 11);
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_end = _data + _size + 12;
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assert(_end - _data >= 12);
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_deafBlockRemain = 0;
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_p = _data + 12;
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}
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AudStream::~AudStream() {
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if (_cache)
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_cache->decRef(_hash);
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}
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int AudStream::readBuffer(int16 *buffer, const int numSamples) {
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int samplesRead = 0;
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if (_compressionType == 99) {
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assert(numSamples % 2 == 0);
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while (samplesRead < numSamples) {
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if (_deafBlockRemain == 0) {
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if (_end - _p == 0)
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break;
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assert(_end - _p >= 6);
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uint16 blockSize = READ_LE_UINT16(_p);
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uint16 blockOutSize = READ_LE_UINT16(_p + 2);
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uint32 sig = READ_LE_UINT32(_p + 4);
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_p += 8;
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assert(sig == 0xdeaf);
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assert(_end - _p >= blockSize);
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// TODO: Previously we asserted that
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// blockOutSize == 4 * blockSize, but
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// occasionally, at the end of an AUD,
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// we see blockOutSize == 4 * blockSize + 2
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// Investigate how BLADE.EXE handles this.
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assert(blockOutSize / 4 == blockSize);
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_deafBlockRemain = blockSize;
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}
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assert(_end - _p >= _deafBlockRemain);
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int bytesConsumed = MIN<int>(_deafBlockRemain, (numSamples - samplesRead) / 2);
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_decoder.decode(_p, bytesConsumed, buffer + samplesRead);
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_p += bytesConsumed;
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_deafBlockRemain -= bytesConsumed;
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samplesRead += 2 * bytesConsumed;
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}
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} else {
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samplesRead = MIN(numSamples, (int)(_end - _p) / 2);
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for (int i = 0; i < samplesRead; i++, _p += 2) {
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buffer[i] = READ_LE_UINT16(_p);
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}
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}
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return samplesRead;
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}
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bool AudStream::rewind() {
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_p = _data + 12;
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_decoder.setParameters(0, 0);
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return true;
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}
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int AudStream::getLength()
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{
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int bytesPerSecond = _frequency;
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if (_flags & 1) { // 16 bit
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bytesPerSecond *= 2;
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}
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if (_flags & 2) { // stereo
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bytesPerSecond *= 2;
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}
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return (1000 * _sizeDecompressed) / bytesPerSecond;
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}
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} // End of namespace BladeRunner
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