forked from mia/Aegisub
87 lines
2.8 KiB
C++
87 lines
2.8 KiB
C++
// Copyright (c) 2008, Rodrigo Braz Monteiro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// -----------------------------------------------------------------------------
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//
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// AEGISUB
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//
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// Website: http://aegisub.cellosoft.com
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// Contact: mailto:zeratul@cellosoft.com
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//
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#pragma once
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///////////
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// Headers
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#include "audio_provider_convert.h"
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///////////////
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// Constructor
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ConvertAudioProvider::ConvertAudioProvider(AudioProvider *src) {
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source = src;
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channels = 1;
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num_samples = source->GetNumSamples();
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sample_rate = source->GetSampleRate();
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bytes_per_sample = 2;
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}
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//////////////
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// Destructor
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ConvertAudioProvider::~ConvertAudioProvider() {
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delete source;
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}
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/////////////
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// Get audio
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void ConvertAudioProvider::GetAudio(void *destination, int64_t start, int64_t count) {
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// Bits per sample
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int srcBps = source->GetBytesPerSample();
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// Convert from 8-bit to 16-bit
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if (srcBps == 1) {
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unsigned char *buffer = new unsigned char[count];
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source->GetAudio(buffer,start,count);
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short temp;
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short *dst = (short*) destination;
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for (int64_t i=0;i<count;i++) {
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temp = (short) buffer[i];
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dst[i] = (temp-128)*256+temp;
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}
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delete [] buffer;
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}
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// No conversion needed
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else if (srcBps == 2) source->GetAudio(destination,start,count);
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// Unsupported
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else throw _T("Unknown bits per sample value.");
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}
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