void ExportMultiple::OnExport(wxCommandEvent& event)
{
ShuttleGui S(this, eIsSavingToPrefs);
PopulateOrExchange(S);
// Make sure the output directory is in good shape
if (!DirOk()) {
return;
}
mFormatIndex = mFormat->GetSelection();
bool overwrite = mOverwrite->GetValue();
if (mPlugins[mFormatIndex]->GetCanMetaData()) {
Tags *tags = mProject->GetTags();
if (tags->IsEmpty()) {
wxString saveTitle = tags->GetTitle();
int saveTrackNumber = tags->GetTrackNumber();
tags->SetTitle(wxT("(automatic)"));
tags->SetTrackNumber(0);
tags->AllowEditTitle(false);
tags->AllowEditTrackNumber(false);
bool rval = tags->ShowEditDialog(mProject,
_("Edit the ID3 tags for all MP3 files"),
true);
tags->AllowEditTitle(true);
tags->AllowEditTrackNumber(true);
if (!rval) {
tags->SetTitle(saveTitle);
tags->SetTrackNumber(saveTrackNumber);
return;
}
}
}
bool ok;
if (mLabel->GetValue()) {
ok = ExportMultipleByLabel(mByName->GetValue(),
mPrefix->GetValue());
}
else {
ok = ExportMultipleByTrack(mByName->GetValue(),
mPrefix->GetValue());
}
if (!ok) {
return;
}
EndModal(1);
}
bool ExportMP3(AudacityProject *project,
bool stereo, wxString fName,
bool selectionOnly, double t0, double t1)
{
double rate = project->GetRate();
wxWindow *parent = project;
TrackList *tracks = project->GetTracks();
wxLogNull logNo; /* temporarily disable wxWindows error messages */
bool success = GetMP3Exporter()->FindLibrary(parent);
if (!success)
return false;
success = GetMP3Exporter()->LoadLibrary();
if (!success) {
wxMessageBox(_("Could not open MP3 encoding library!"));
gPrefs->Write("/MP3/MP3LibPath", wxString(""));
return false;
}
if(!GetMP3Exporter()->ValidLibraryLoaded()) {
wxMessageBox(_("Not a valid or supported MP3 encoding library!"));
gPrefs->Write("/MP3/MP3LibPath", wxString(""));
return false;
}
/* Open file for writing */
wxFFile outFile(fName, "wb");
if (!outFile.IsOpened()) {
wxMessageBox(_("Unable to open target file for writing"));
return false;
}
/* Put ID3 tags at beginning of file */
Tags *tags = project->GetTags();
if (!tags->ShowEditDialog(project, _("Edit the ID3 tags for the MP3 file")))
return false; // used selected "cancel"
char *id3buffer;
int id3len;
bool endOfFile;
id3len = tags->ExportID3(&id3buffer, &endOfFile);
if (!endOfFile)
outFile.Write(id3buffer, id3len);
/* Export MP3 using DLL */
long bitrate = gPrefs->Read("/FileFormats/MP3Bitrate", 128);
GetMP3Exporter()->SetBitrate(bitrate);
sampleCount inSamples = GetMP3Exporter()->InitializeStream(stereo ? 2 : 1, int(rate + 0.5));
double timeStep = (double)inSamples / rate;
double t = t0;
wxProgressDialog *progress = NULL;
wxYield();
wxStartTimer();
wxBusyCursor busy;
bool cancelling = false;
long bytes;
int bufferSize = GetMP3Exporter()->GetOutBufferSize();
unsigned char *buffer = new unsigned char[bufferSize];
wxASSERT(buffer);
while (t < t1 && !cancelling) {
double deltat = timeStep;
bool lastFrame = false;
sampleCount numSamples = inSamples;
if (t + deltat > t1) {
lastFrame = true;
deltat = t1 - t;
numSamples = int(deltat * rate + 0.5);
}
Mixer *mixer = new Mixer(stereo ? 2 : 1, numSamples, true,
rate, int16Sample);
wxASSERT(mixer);
mixer->Clear();
TrackListIterator iter(tracks);
VTrack *tr = iter.First();
while (tr) {
if (tr->GetKind() == VTrack::Wave) {
if (tr->GetSelected() || !selectionOnly) {
if (tr->GetChannel() == VTrack::MonoChannel)
mixer->MixMono((WaveTrack *) tr, t, t + deltat);
else if (tr->GetChannel() == VTrack::LeftChannel)
mixer->MixLeft((WaveTrack *) tr, t, t + deltat);
else if (tr->GetChannel() == VTrack::RightChannel)
mixer->MixRight((WaveTrack *) tr, t, t + deltat);
}
}
tr = iter.Next();
}
short *mixed = (short *)mixer->GetBuffer();
if(lastFrame)
bytes = GetMP3Exporter()->EncodeRemainder(mixed, numSamples, buffer);
else
bytes = GetMP3Exporter()->EncodeBuffer(mixed, buffer);
outFile.Write(buffer, bytes);
t += deltat;
if (!progress && wxGetElapsedTime(false) > 500) {
wxString message;
if (selectionOnly)
message =
wxString::Format(_("Exporting the selected audio as an mp3"));
else
message =
wxString::Format(_("Exporting the entire project as an mp3"));
progress =
new wxProgressDialog(_("Export"),
message,
1000,
parent,
wxPD_CAN_ABORT |
wxPD_REMAINING_TIME | wxPD_AUTO_HIDE);
}
if (progress) {
cancelling =
!progress->Update(int (((t - t0) * 1000) / (t1 - t0) + 0.5));
}
delete mixer;
}
bytes = GetMP3Exporter()->FinishStream(buffer);
if (bytes)
outFile.Write(buffer, bytes);
/* Write ID3 tag if it was supposed to be at the end of the file */
if (endOfFile)
outFile.Write(id3buffer, id3len);
delete[] id3buffer;
/* Close file */
outFile.Close();
/* MacOS: set the file type/creator so that the OS knows it's an MP3
file which was created by Audacity */
#ifdef __WXMAC__
FSSpec spec;
wxMacFilename2FSSpec(fName, &spec);
FInfo finfo;
if (FSpGetFInfo(&spec, &finfo) == noErr) {
finfo.fdType = 'MP3 ';
finfo.fdCreator = AUDACITY_CREATOR;
FSpSetFInfo(&spec, &finfo);
}
#endif
if (progress)
delete progress;
delete[]buffer;
return true;
}
