Aegisub/aegisub/src/audio_provider_hd.cpp

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// Copyright (c) 2005-2006, Rodrigo Braz Monteiro, Fredrik Mellbin
// 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/
//
// $Id$
/// @file audio_provider_hd.cpp
/// @brief Caching audio provider using a file for backing
/// @ingroup audio_input
///
#include "config.h"
#ifndef AGI_PRE
#include <wx/filefn.h>
#include <wx/filename.h>
#endif
#include <libaegisub/background_runner.h>
#include <libaegisub/io.h>
#include "audio_provider_hd.h"
#include "audio_controller.h"
#include "audio_provider_pcm.h"
#include "compat.h"
#include "main.h"
#include "standard_paths.h"
#include "utils.h"
namespace {
wxString cache_dir() {
wxString path = lagi_wxString(OPT_GET("Audio/Cache/HD/Location")->GetString());
if (path == "default")
path = "?temp/";
return DecodeRelativePath(StandardPaths::DecodePath(path), StandardPaths::DecodePath("?user/"));
}
wxString cache_path() {
wxString pattern = lagi_wxString(OPT_GET("Audio/Cache/HD/Name")->GetString());
if (pattern.Find("%02i") == wxNOT_FOUND) pattern = "audio%02i.tmp";
// Try from 00 to 99
for (int i=0;i<100;i++) {
// File exists?
wxString curStringTry = cache_dir() + wxString::Format(pattern,i);
if (!wxFile::Exists(curStringTry))
return curStringTry;
}
return "";
}
/// A PCM audio provider for raw dumps with no header
class RawAudioProvider : public PCMAudioProvider {
public:
RawAudioProvider(wxString const& cache_filename, AudioProvider *src)
: PCMAudioProvider(cache_filename)
{
bytes_per_sample = src->GetBytesPerSample();
num_samples = src->GetNumSamples();
channels = src->GetChannels();
sample_rate = src->GetSampleRate();
filename = src->GetFilename();
float_samples = src->AreSamplesFloat();
IndexPoint p = { 0, 0, num_samples };
index_points.push_back(p);
}
bool AreSamplesNativeEndian() const { return true; }
};
}
HDAudioProvider::HDAudioProvider(AudioProvider *src, agi::BackgroundRunner *br) {
agi::scoped_ptr<AudioProvider> source(src);
assert(src->AreSamplesNativeEndian()); // Byteswapping should be done before caching
// Check free space
wxDiskspaceSize_t freespace;
if (wxGetDiskSpace(cache_dir(), 0, &freespace)) {
if (num_samples * channels * bytes_per_sample > freespace)
throw agi::AudioCacheOpenError("Not enough free disk space in " + STD_STR(cache_dir()) + " to cache the audio", 0);
}
bytes_per_sample = source->GetBytesPerSample();
num_samples = source->GetNumSamples();
channels = source->GetChannels();
sample_rate = source->GetSampleRate();
filename = source->GetFilename();
float_samples = source->AreSamplesFloat();
diskCacheFilename = cache_path();
try {
{
agi::io::Save out(STD_STR(diskCacheFilename), true);
br->Run(bind(&HDAudioProvider::FillCache, this, src, &out.Get(), std::tr1::placeholders::_1));
}
cache_provider.reset(new RawAudioProvider(diskCacheFilename, src));
}
catch (...) {
wxRemoveFile(diskCacheFilename);
throw;
}
}
HDAudioProvider::~HDAudioProvider() {
cache_provider.reset(); // explicitly close the file so we can delete it
wxRemoveFile(diskCacheFilename);
}
void HDAudioProvider::GetAudio(void *buf, int64_t start, int64_t count) const {
cache_provider->GetAudio(buf, start, count);
}
void HDAudioProvider::FillCache(AudioProvider *src, std::ofstream *out, agi::ProgressSink *ps) {
ps->SetMessage(STD_STR(_("Reading to Hard Disk cache")));
int64_t block = 65536;
std::vector<char> read_buf;
read_buf.resize(block * channels * bytes_per_sample);
for (int64_t i = 0; i < num_samples; i += block) {
block = std::min(block, num_samples - i);
src->GetAudio(&read_buf[0], i, block);
out->write(&read_buf[0], block * channels * bytes_per_sample);
ps->SetProgress(i, num_samples);
if (ps->IsCancelled()) return;
}
}