146 lines
4.4 KiB
C++
146 lines
4.4 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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// -----------------------------------------------------------------------------
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//
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// AEGISUB
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//
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// Website: http://aegisub.cellosoft.com
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// Contact: mailto:zeratul@cellosoft.com
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//
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///////////
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// Headers
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#include "dialog_progress.h"
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#include "audio_provider_hd.h"
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#include "main.h"
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///////////////
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// Constructor
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HDAudioProvider::HDAudioProvider(AudioProvider *source) {
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// Copy parameters
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bytes_per_sample = source->GetBytesPerSample();
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num_samples = source->GetNumSamples();
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channels = source->GetChannels();
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sample_rate = source->GetSampleRate();
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filename = source->GetFilename();
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// Check free space
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wxLongLong freespace;
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if (wxGetDiskSpace(DiskCachePath(), NULL, &freespace)) {
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if (num_samples * channels * bytes_per_sample > freespace) {
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throw wxString(_T("Not enough free diskspace in "))+DiskCachePath()+wxString(_T(" to cache the audio"));
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}
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}
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// Open output file
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std::ofstream file;
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char filename[512];
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strcpy(filename,DiskCacheName().mb_str(wxConvLocal));
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file.open(filename,std::ios::binary | std::ios::out | std::ios::trunc);
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// Start progress
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volatile bool canceled = false;
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DialogProgress *progress = new DialogProgress(NULL,_T("Load audio"),&canceled,_T("Reading to Hard Disk cache"),0,num_samples);
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progress->Show();
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// Write to disk
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int block = 4096;
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char *temp = new char[block * channels * bytes_per_sample];
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for (__int64 i=0;i<num_samples && !canceled; i+=block) {
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if (block+i > num_samples) block = num_samples - i;
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source->GetAudio(temp,i,block);
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file.write(temp,block * channels * bytes_per_sample);
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progress->SetProgress(i,num_samples);
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}
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file.close();
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// Finish
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if (!canceled) {
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progress->Destroy();
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file_cache.open(filename,std::ios::binary | std::ios::in);
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}
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else {
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throw wxString(_T("Audio loading cancelled by user"));
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}
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}
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//////////////
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// Destructor
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HDAudioProvider::~HDAudioProvider() {
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file_cache.close();
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wxRemoveFile(DiskCacheName());
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}
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/////////////
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// Get audio
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void HDAudioProvider::GetAudio(void *buf, __int64 start, __int64 count) {
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// Requested beyond the length of audio
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if (start+count > num_samples) {
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__int64 oldcount = count;
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count = num_samples-start;
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if (count < 0) count = 0;
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// Fill beyond with zero
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if (bytes_per_sample == 1) {
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char *temp = (char *) buf;
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for (int i=count;i<oldcount;i++) {
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temp[i] = 0;
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}
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}
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if (bytes_per_sample == 2) {
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short *temp = (short *) buf;
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for (int i=count;i<oldcount;i++) {
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temp[i] = 0;
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}
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}
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}
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if (count) {
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wxMutexLocker disklock(diskmutex);
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file_cache.seekg(start*bytes_per_sample);
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file_cache.read((char*)buf,count*bytes_per_sample*channels);
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}
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}
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///////////////////////////
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// Get disk cache path
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wxString HDAudioProvider::DiskCachePath() {
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return AegisubApp::folderName;
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}
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///////////////////////////
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// Get disk cache filename
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wxString HDAudioProvider::DiskCacheName() {
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return DiskCachePath() + _T("audio.tmp");
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}
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