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4e4a95c648
* Remove no-longer-used cmake Modules * Don't use OpenShot.h in ExampleHtml.cpp When `#include`-ing the whole mess, building the file was leading to what looked like out-of-memory errors. Replacing the monolithic header with just the necessary ones cleared it up. * .gitlab-ci.yml: Update for new Windows setup * Make unit tests work under Windows - Copying the built and depended (libopenshot-audio) DLLs into the unit test dir before building the tests ensures that when the test executables are run by the Catch.cmake module to discover their contents, the executables will find the DLLs they need in order to run. * Gitlab-ci: Run unit tests on Windows * Rename openshot-html-example (The former name, openshot-html-test, was too close to the new name format for all of our unit test executables, making things unnecessarily confusing.) * Rename JuceHeader.h to OpenShotAudio.h * Github Actions: Install ALSA libs With the switch to an EXPORTED CMake configuration for libopenshot-audio, its dependencies become our dependencies. Which means that CMake now correctly requires that the ALSA libs be installed.
84 lines
2.7 KiB
C++
84 lines
2.7 KiB
C++
/**
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* @file
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* @brief Header file for AudioResampler class
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* @author Jonathan Thomas <jonathan@openshot.org>
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*
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* @ref License
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*/
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/* LICENSE
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*
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* Copyright (c) 2008-2019 OpenShot Studios, LLC
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* <http://www.openshotstudios.com/>. This file is part of
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* OpenShot Library (libopenshot), an open-source project dedicated to
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* delivering high quality video editing and animation solutions to the
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* world. For more information visit <http://www.openshot.org/>.
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*
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* OpenShot Library (libopenshot) is free software: you can redistribute it
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* and/or modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* OpenShot Library (libopenshot) is distributed in the hope that it will be
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* useful, 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef OPENSHOT_RESAMPLER_H
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#define OPENSHOT_RESAMPLER_H
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#include "AudioBufferSource.h"
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#include <OpenShotAudio.h>
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namespace openshot {
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/**
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* @brief This class is used to resample audio data for many sequential frames.
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*
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* It maintains some data from the last call to GetResampledBuffer(), so there
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* are no pops and clicks between frames.
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*/
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class AudioResampler {
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private:
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juce::AudioSampleBuffer *buffer;
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juce::AudioSampleBuffer *resampled_buffer;
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openshot::AudioBufferSource *buffer_source;
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juce::ResamplingAudioSource *resample_source;
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juce::AudioSourceChannelInfo resample_callback_buffer;
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int num_of_samples;
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int new_num_of_samples;
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double dest_ratio;
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double source_ratio;
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bool isPrepared;
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public:
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/// Default constructor
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AudioResampler();
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/// Destructor
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~AudioResampler();
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/// @brief Sets the audio buffer and key settings
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/// @param new_buffer The buffer of audio samples needing to be resampled
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/// @param sample_rate The original sample rate of the buffered samples
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/// @param new_sample_rate The requested sample rate you need
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void SetBuffer(juce::AudioSampleBuffer *new_buffer, double sample_rate, double new_sample_rate);
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/// @brief Sets the audio buffer and key settings
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/// @param new_buffer The buffer of audio samples needing to be resampled
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/// @param ratio The multiplier that needs to be applied to the sample rate (this is how resampling happens)
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void SetBuffer(juce::AudioSampleBuffer *new_buffer, double ratio);
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/// Get the resampled audio buffer
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juce::AudioSampleBuffer* GetResampledBuffer();
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};
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}
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#endif
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