139 lines
4.8 KiB
C++
139 lines
4.8 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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/// @file audio_provider_hd.cpp
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/// @brief Caching audio provider using a file for backing
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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_hd.h"
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#include "audio_controller.h"
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#include "audio_provider_pcm.h"
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#include "compat.h"
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#include "options.h"
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#include "utils.h"
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#include <libaegisub/access.h>
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#include <libaegisub/background_runner.h>
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#include <libaegisub/fs.h>
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#include <libaegisub/io.h>
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#include <libaegisub/path.h>
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#include <libaegisub/util.h>
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#include <boost/algorithm/string/predicate.hpp>
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#include <boost/algorithm/string/replace.hpp>
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#include <boost/filesystem.hpp>
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#include <fstream>
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namespace {
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agi::fs::path cache_dir() {
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std::string path = OPT_GET("Audio/Cache/HD/Location")->GetString();
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if (path == "default")
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path = "?temp";
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return config::path->MakeAbsolute(config::path->Decode(path), "?temp");
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}
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agi::fs::path cache_path() {
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std::string pattern = OPT_GET("Audio/Cache/HD/Name")->GetString();
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if (!boost::contains(pattern, "%02i")) pattern = "audio%02i.tmp";
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boost::replace_all(pattern, "%02i", "%%%%-%%%%-%%%%-%%%%");
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return unique_path(cache_dir()/pattern);
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}
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/// A PCM audio provider for raw dumps with no header
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class RawAudioProvider final : public PCMAudioProvider {
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public:
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RawAudioProvider(agi::fs::path const& cache_filename, AudioProvider *src)
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: PCMAudioProvider(cache_filename)
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{
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bytes_per_sample = src->GetBytesPerSample();
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num_samples = src->GetNumSamples();
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channels = src->GetChannels();
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sample_rate = src->GetSampleRate();
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filename = src->GetFilename();
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float_samples = src->AreSamplesFloat();
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IndexPoint p = { 0, 0, num_samples };
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index_points.push_back(p);
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}
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};
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}
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HDAudioProvider::HDAudioProvider(std::unique_ptr<AudioProvider> src, agi::BackgroundRunner *br)
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: AudioProviderWrapper(std::move(src))
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{
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// Check free space
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if ((uint64_t)num_samples * channels * bytes_per_sample > agi::fs::FreeSpace(cache_dir()))
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throw agi::AudioCacheOpenError("Not enough free disk space in " + cache_dir().string() + " to cache the audio", nullptr);
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diskCacheFilename = cache_path();
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try {
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{
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agi::io::Save out(diskCacheFilename, true);
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br->Run(bind(&HDAudioProvider::FillCache, this, source.get(), &out.Get(), std::placeholders::_1));
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}
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cache_provider = agi::util::make_unique<RawAudioProvider>(diskCacheFilename, source.get());
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}
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catch (...) {
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agi::fs::Remove(diskCacheFilename);
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throw;
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}
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}
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HDAudioProvider::~HDAudioProvider() {
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cache_provider.reset(); // explicitly close the file so we can delete it
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agi::fs::Remove(diskCacheFilename);
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}
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void HDAudioProvider::FillBuffer(void *buf, int64_t start, int64_t count) const {
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cache_provider->GetAudio(buf, start, count);
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}
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void HDAudioProvider::FillCache(AudioProvider *src, std::ofstream *out, agi::ProgressSink *ps) {
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ps->SetMessage(from_wx(_("Reading to Hard Disk cache")));
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int64_t block = 65536;
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std::vector<char> read_buf;
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read_buf.resize(block * channels * bytes_per_sample);
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for (int64_t i = 0; i < num_samples; i += block) {
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block = std::min(block, num_samples - i);
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src->GetAudio(&read_buf[0], i, block);
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out->write(&read_buf[0], block * channels * bytes_per_sample);
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ps->SetProgress(i, num_samples);
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if (ps->IsCancelled()) return;
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}
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}
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