forked from mia/Aegisub
81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
// Copyright (c) 2005-2006, Rodrigo Braz Monteiro, Fredrik Mellbin
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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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// Aegisub Project http://www.aegisub.org/
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//
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// $Id$
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/// @file audio_provider_dummy.cpp
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/// @brief Dummy (silence or noise) audio provider
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/// @ingroup audio_input
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///
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#include "config.h"
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#include "audio_provider_dummy.h"
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#include "utils.h"
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namespace media {
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/// @brief Constructor
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/// @param dur_ms
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/// @param _noise
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///
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DummyAudioProvider::DummyAudioProvider(unsigned long dur_ms, bool _noise) {
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noise = _noise;
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channels = 1;
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sample_rate = 44100;
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bytes_per_sample = 2;
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num_samples = (int64_t)dur_ms * sample_rate / 1000;
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}
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/// @brief Destructor
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///
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DummyAudioProvider::~DummyAudioProvider() {
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}
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/// @brief Get audio
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/// @param buf
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/// @param start
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/// @param count
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///
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void DummyAudioProvider::GetAudio(void *buf, int64_t start, int64_t count) const {
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short *workbuf = (short*)buf;
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if (noise) {
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while (--count > 0)
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*workbuf++ = (rand() - RAND_MAX/2) * 10000 / RAND_MAX;
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}
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else {
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while (--count > 0)
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*workbuf++ = 0;
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}
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}
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} // namespace
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