Aegisub/aegisub/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
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//
///////////
// Headers
#include <wx/filename.h>
#include <wx/file.h>
#include <wx/filefn.h>
#include "dialog_progress.h"
#include "audio_provider_hd.h"
#include "standard_paths.h"
#include "options.h"
#include "utils.h"
///////////////
// Constructor
HDAudioProvider::HDAudioProvider(AudioProvider *source) {
// Copy parameters
bytes_per_sample = source->GetBytesPerSample();
num_samples = source->GetNumSamples();
channels = source->GetChannels();
sample_rate = source->GetSampleRate();
filename = source->GetFilename();
// Check free space
wxLongLong freespace;
if (wxGetDiskSpace(DiskCachePath(), NULL, &freespace)) {
if (num_samples * channels * bytes_per_sample > freespace) {
throw wxString(_T("Not enough free disk space in "))+DiskCachePath()+wxString(_T(" to cache the audio"));
}
}
// Open output file
diskCacheFilename = DiskCacheName();
file_cache.Create(diskCacheFilename,true,wxS_DEFAULT);
file_cache.Open(diskCacheFilename,wxFile::read_write);
if (!file_cache.IsOpened()) throw _T("Unable to write to audio disk cache.");
// Start progress
volatile bool canceled = false;
DialogProgress *progress = new DialogProgress(NULL,_T("Load audio"),&canceled,_T("Reading to Hard Disk cache"),0,num_samples);
progress->Show();
// Write to disk
int block = 4096;
char *temp = new char[block * channels * bytes_per_sample];
for (long long i=0;i<num_samples && !canceled; i+=block) {
if (block+i > num_samples) block = num_samples - i;
source->GetAudio(temp,i,block);
file_cache.Write(temp,block * channels * bytes_per_sample);
progress->SetProgress(i,num_samples);
}
file_cache.Seek(0);
// Finish
if (!canceled) {
progress->Destroy();
}
else {
file_cache.Close();
throw wxString(_T("Audio loading cancelled by user"));
}
}
//////////////
// Destructor
HDAudioProvider::~HDAudioProvider() {
file_cache.Close();
wxRemoveFile(diskCacheFilename);
}
/////////////
// Get audio
void HDAudioProvider::GetAudio(void *buf, long long start, long long count) {
// Requested beyond the length of audio
if (start+count > num_samples) {
long long oldcount = count;
count = num_samples-start;
if (count < 0) count = 0;
// Fill beyond with zero
if (bytes_per_sample == 1) {
char *temp = (char *) buf;
for (int i=count;i<oldcount;i++) {
temp[i] = 0;
}
}
if (bytes_per_sample == 2) {
short *temp = (short *) buf;
for (int i=count;i<oldcount;i++) {
temp[i] = 0;
}
}
}
if (count) {
wxMutexLocker disklock(diskmutex);
file_cache.Seek(start*bytes_per_sample);
file_cache.Read((char*)buf,count*bytes_per_sample*channels);
}
}
///////////////////////////
// Get disk cache path
wxString HDAudioProvider::DiskCachePath() {
// Default
wxString path = Options.AsText(_T("Audio HD Cache Location"));
if (path == _T("default")) return StandardPaths::DecodePath(_T("?temp/"));
// Specified
return DecodeRelativePath(path,StandardPaths::DecodePath(_T("?user/")));
}
///////////////////////////
// Get disk cache filename
wxString HDAudioProvider::DiskCacheName() {
// Get pattern
wxString pattern = Options.AsText(_T("Audio HD Cache Name"));
if (pattern.Find(_T("%02i")) == wxNOT_FOUND) pattern = _T("audio%02i.tmp");
// Try from 00 to 99
for (int i=0;i<100;i++) {
// File exists?
wxString curStringTry = DiskCachePath() + wxString::Format(pattern.c_str(),i);
if (!wxFile::Exists(curStringTry)) return curStringTry;
// Exists, see if it can be opened (disabled because wx doesn't seem to lock the files...)
if (false) {
wxFile test(curStringTry,wxFile::write);
if (test.IsOpened()) {
test.Close();
return curStringTry;
}
}
}
return _T("");
}