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Sounds are loaded into memory on first use, using the SoundLoader interface to support format conversion. Sounds are retained in memory to avoid reloading every time a sound is played. This deduplicates WAV header parsing between NewGRF and baseset sounds, and will allow different audio formats to be supported.
53 lines
2.0 KiB
C++
53 lines
2.0 KiB
C++
/*
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* This file is part of OpenTTD.
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* OpenTTD 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, version 2.
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* OpenTTD 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.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file soundloader_raw.cpp Loading of raw sounds. */
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#include "stdafx.h"
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#include "random_access_file_type.h"
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#include "sound_type.h"
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#include "soundloader_type.h"
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#include "safeguards.h"
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/** Raw PCM sound loader, used as a fallback if other sound loaders fail. */
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class SoundLoader_Raw : public SoundLoader {
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public:
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SoundLoader_Raw() : SoundLoader("raw", "Raw PCM loader", INT_MAX) {}
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static constexpr uint16_t RAW_SAMPLE_RATE = 11025; ///< Sample rate of raw pcm samples.
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static constexpr uint8_t RAW_SAMPLE_BITS = 8; ///< Bit depths of raw pcm samples.
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bool Load(SoundEntry &sound, bool new_format, std::vector<uint8_t> &data) override
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{
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/* Raw sounds are apecial case for the jackhammer sound (name in Windows sample.cat is "Corrupt sound")
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* It's not a RIFF file, but raw PCM data.
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* We no longer compare by name as the same file in the DOS sample.cat does not have a unique name. */
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/* Raw sounds are not permitted in a new format file. */
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if (new_format) return false;
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sound.channels = 1;
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sound.rate = RAW_SAMPLE_RATE;
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sound.bits_per_sample = RAW_SAMPLE_BITS;
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/* Allocate an extra sample to ensure the runtime resampler doesn't go out of bounds.*/
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data.reserve(sound.file_size + 1);
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data.resize(sound.file_size);
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sound.file->ReadBlock(std::data(data), std::size(data));
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/* Convert 8-bit samples from unsigned to signed. */
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for (auto &sample : data) {
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sample = sample - 128;
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}
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return true;
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}
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};
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static SoundLoader_Raw s_sound_loader_raw;
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