242 lines
7 KiB
C++
242 lines
7 KiB
C++
// Copyright (c) 2009-2010, Niels Martin Hansen
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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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/// @file audio_renderer.cpp
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/// @brief Base classes for audio renderers (spectrum, waveform, ...)
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/// @ingroup audio_ui
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#include "audio_renderer.h"
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#include <libaegisub/audio/provider.h>
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#include <libaegisub/make_unique.h>
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#include <algorithm>
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#include <wx/dc.h>
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namespace {
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template<typename T>
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bool compare_and_set(T &var, const T new_value)
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{
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if (var == new_value) return false;
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var = new_value;
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return true;
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}
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}
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AudioRendererBitmapCacheBitmapFactory::AudioRendererBitmapCacheBitmapFactory(AudioRenderer *renderer)
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: renderer(renderer)
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{
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assert(renderer);
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}
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std::unique_ptr<wxBitmap> AudioRendererBitmapCacheBitmapFactory::ProduceBlock(int /* i */)
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{
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return agi::make_unique<wxBitmap>(renderer->cache_bitmap_width, renderer->pixel_height, 24);
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}
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size_t AudioRendererBitmapCacheBitmapFactory::GetBlockSize() const
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{
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return sizeof(wxBitmap) + renderer->cache_bitmap_width * renderer->pixel_height * 3;
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}
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AudioRenderer::AudioRenderer()
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{
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for (int i = 0; i < AudioStyle_MAX; ++i)
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bitmaps.emplace_back(256, AudioRendererBitmapCacheBitmapFactory(this));
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// Make sure there's *some* values for those fields, and in the caches
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SetMillisecondsPerPixel(1);
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SetHeight(1);
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}
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void AudioRenderer::SetMillisecondsPerPixel(const double new_pixel_ms)
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{
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if (compare_and_set(pixel_ms, new_pixel_ms))
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{
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if (renderer)
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renderer->SetMillisecondsPerPixel(pixel_ms);
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ResetBlockCount();
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}
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}
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void AudioRenderer::SetHeight(const int _pixel_height)
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{
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if (compare_and_set(pixel_height, _pixel_height))
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Invalidate();
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}
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void AudioRenderer::SetAmplitudeScale(const float _amplitude_scale)
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{
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if (compare_and_set(amplitude_scale, _amplitude_scale))
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{
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// A scaling of 0 or a negative scaling makes no sense
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assert(amplitude_scale > 0);
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if (renderer)
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renderer->SetAmplitudeScale(amplitude_scale);
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Invalidate();
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}
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}
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void AudioRenderer::SetRenderer(AudioRendererBitmapProvider *const _renderer)
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{
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if (compare_and_set(renderer, _renderer))
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{
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Invalidate();
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if (renderer)
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{
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renderer->SetProvider(provider);
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renderer->SetAmplitudeScale(amplitude_scale);
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renderer->SetMillisecondsPerPixel(pixel_ms);
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}
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}
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}
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void AudioRenderer::SetAudioProvider(agi::AudioProvider *const _provider)
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{
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if (compare_and_set(provider, _provider))
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{
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Invalidate();
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if (renderer)
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renderer->SetProvider(provider);
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ResetBlockCount();
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}
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}
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void AudioRenderer::SetCacheMaxSize(const size_t max_size)
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{
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// Limit the bitmap cache sizes to 16 MB hard, to avoid the risk of exhausting
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// system bitmap object resources and similar. Experimenting shows that 16 MB
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// bitmap cache should be plenty even if working with a one hour audio clip.
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cache_bitmap_maxsize = std::min<size_t>(max_size/8, 0x1000000);
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// The renderer gets whatever is left.
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cache_renderer_maxsize = max_size - 4*cache_bitmap_maxsize;
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}
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void AudioRenderer::ResetBlockCount()
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{
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if (provider)
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{
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const size_t total_blocks = NumBlocks(provider->GetNumSamples());
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for (auto& bmp : bitmaps) bmp.SetBlockCount(total_blocks);
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}
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}
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size_t AudioRenderer::NumBlocks(const int64_t samples) const
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{
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const double duration = samples * 1000.0 / provider->GetSampleRate();
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return static_cast<size_t>(duration / pixel_ms / cache_bitmap_width);
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}
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const wxBitmap *AudioRenderer::GetCachedBitmap(const int i, const AudioRenderingStyle style)
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{
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assert(provider);
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assert(renderer);
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bool created = false;
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wxBitmap *bmp = bitmaps[style].Get(i, &created);
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assert(bmp);
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if (created)
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{
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renderer->Render(*bmp, i*cache_bitmap_width, style);
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needs_age = true;
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}
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assert(bmp->IsOk());
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return bmp;
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}
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void AudioRenderer::Render(wxDC &dc, wxPoint origin, const int start, const int length, const AudioRenderingStyle style)
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{
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assert(start >= 0);
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if (!provider) return;
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if (!renderer) return;
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if (length <= 0) return;
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// One past last absolute pixel strip to render
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const int end = start + length;
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// One past last X coordinate to render on
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const int lastx = origin.x + length;
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// Figure out which range of bitmaps are required
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const int firstbitmap = start / cache_bitmap_width;
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// And the offset in it to start its use at
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const int firstbitmapoffset = start % cache_bitmap_width;
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// The last bitmap required
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const int lastbitmap = std::min<int>(end / cache_bitmap_width, NumBlocks(provider->GetDecodedSamples()) - 1);
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// Set a clipping region so that the first and last bitmaps don't draw
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// outside the requested range
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const wxDCClipper clipper(dc, wxRect(origin, wxSize(length, pixel_height)));
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origin.x -= firstbitmapoffset;
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for (int i = firstbitmap; i <= lastbitmap; ++i)
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{
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dc.DrawBitmap(*GetCachedBitmap(i, style), origin);
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origin.x += cache_bitmap_width;
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}
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// Now render blank audio from origin to end
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if (origin.x < lastx)
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renderer->RenderBlank(dc, wxRect(origin.x-1, origin.y, lastx-origin.x+1, pixel_height), style);
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if (needs_age)
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{
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bitmaps[style].Age(cache_bitmap_maxsize);
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renderer->AgeCache(cache_renderer_maxsize);
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needs_age = false;
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}
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}
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void AudioRenderer::Invalidate()
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{
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for (auto& bmp : bitmaps) bmp.Age(0);
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needs_age = false;
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}
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void AudioRendererBitmapProvider::SetProvider(agi::AudioProvider *const _provider)
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{
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if (compare_and_set(provider, _provider))
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OnSetProvider();
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}
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void AudioRendererBitmapProvider::SetMillisecondsPerPixel(const double new_pixel_ms)
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{
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if (compare_and_set(pixel_ms, new_pixel_ms))
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OnSetMillisecondsPerPixel();
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}
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void AudioRendererBitmapProvider::SetAmplitudeScale(const float _amplitude_scale)
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{
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if (compare_and_set(amplitude_scale, _amplitude_scale))
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OnSetAmplitudeScale();
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}
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