Aegisub/src/audio_renderer_waveform.h

78 lines
3.1 KiB
C++

// Copyright (c) 2010, Niels Martin Hansen
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Aegisub Project http://www.aegisub.org/
#include "audio_renderer.h"
#include <memory>
#include <vector>
class AudioColorScheme;
class wxArrayString;
/// Render a waveform display of PCM audio data
class AudioWaveformRenderer final : public AudioRendererBitmapProvider {
/// Colour tables used for rendering
std::vector<AudioColorScheme> colors;
/// Pre-allocated buffer for audio fetched from provider
std::unique_ptr<char[]> audio_buffer;
/// Whether to render max+avg or just max
bool render_averages;
void OnSetProvider() override { audio_buffer.reset(); }
void OnSetMillisecondsPerPixel() override { audio_buffer.reset(); }
public:
/// @brief Constructor
/// @param color_scheme_name Name of the color scheme to use
AudioWaveformRenderer(std::string const& color_scheme_name);
/// @brief Destructor
~AudioWaveformRenderer();
/// @brief Render a range of audio waveform
/// @param bmp [in,out] Bitmap to render into, also carries length information
/// @param start First column of pixel data in display to render
/// @param style Style to render audio in
void Render(wxBitmap &bmp, int start, AudioRenderingStyle style) override;
/// @brief Render blank area
void RenderBlank(wxDC &dc, const wxRect &rect, AudioRenderingStyle style) override;
/// @brief Cleans up the cache
/// @param max_size Maximum size in bytes for the cache
///
/// Does nothing for waveform renderer, since it does not have a backend cache
void AgeCache(size_t max_size) override { }
/// Get a list of waveform rendering modes
static wxArrayString GetWaveformStyles();
};