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audacia/src/export/ExportFLAC.cpp

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/**********************************************************************
Audacity: A Digital Audio Editor
ExportFLAC.cpp
Frederik M.J.V
This program is distributed under the GNU General Public License, version 2.
A copy of this license is included with this source.
Based on ExportOGG.cpp by:
Joshua Haberman
Portions from vorbis-tools, copyright 2000-2002 Michael Smith
<msmith@labyrinth.net.au>; Vorbize, Kenneth Arnold <kcarnold@yahoo.com>;
and libvorbis examples, Monty <monty@xiph.org>
**********************************************************************/
#include "../Audacity.h"
#ifdef USE_LIBFLAC
#include "ExportFLAC.h"
#include "Export.h"
#include <wx/progdlg.h>
#include <wx/ffile.h>
#include <wx/log.h>
#include <wx/msgdlg.h>
#include "FLAC++/encoder.h"
#include "../float_cast.h"
#include "../Project.h"
#include "../Mix.h"
#include "../Prefs.h"
#include "../ShuttleGui.h"
#include "../Internat.h"
#include "../Tags.h"
#include "../Track.h"
//----------------------------------------------------------------------------
// ExportFLACOptions Class
//----------------------------------------------------------------------------
class ExportFLACOptions : public wxPanel
{
public:
ExportFLACOptions(wxWindow *parent, int format);
virtual ~ExportFLACOptions();
void PopulateOrExchange(ShuttleGui & S);
bool TransferDataToWindow();
bool TransferDataFromWindow();
};
///
///
ExportFLACOptions::ExportFLACOptions(wxWindow *parent, int WXUNUSED(format))
: wxPanel(parent, wxID_ANY)
{
ShuttleGui S(this, eIsCreatingFromPrefs);
PopulateOrExchange(S);
TransferDataToWindow();
}
///
///
ExportFLACOptions::~ExportFLACOptions()
{
TransferDataFromWindow();
}
///
///
void ExportFLACOptions::PopulateOrExchange(ShuttleGui & S)
{
wxArrayString flacLevelNames, flacLevelLabels;
flacLevelLabels.Add(wxT("0")); flacLevelNames.Add(_("0 (fastest)"));
flacLevelLabels.Add(wxT("1")); flacLevelNames.Add(_("1"));
flacLevelLabels.Add(wxT("2")); flacLevelNames.Add(_("2"));
flacLevelLabels.Add(wxT("3")); flacLevelNames.Add(_("3"));
flacLevelLabels.Add(wxT("4")); flacLevelNames.Add(_("4"));
flacLevelLabels.Add(wxT("5")); flacLevelNames.Add(_("5"));
flacLevelLabels.Add(wxT("6")); flacLevelNames.Add(_("6"));
flacLevelLabels.Add(wxT("7")); flacLevelNames.Add(_("7"));
flacLevelLabels.Add(wxT("8")); flacLevelNames.Add(_("8 (best)"));
wxArrayString flacBitDepthNames, flacBitDepthLabels;
flacBitDepthLabels.Add(wxT("16")); flacBitDepthNames.Add(_("16 bit"));
flacBitDepthLabels.Add(wxT("24")); flacBitDepthNames.Add(_("24 bit"));
S.StartVerticalLay();
{
S.StartHorizontalLay(wxCENTER);
{
S.StartMultiColumn(2, wxCENTER);
{
S.TieChoice(_("Level:"), wxT("/FileFormats/FLACLevel"),
wxT("5"), flacLevelNames, flacLevelLabels);
S.TieChoice(_("Bit depth:"), wxT("/FileFormats/FLACBitDepth"),
wxT("16"), flacBitDepthNames, flacBitDepthLabels);
}
S.EndMultiColumn();
}
S.EndHorizontalLay();
}
S.EndVerticalLay();
return;
}
///
///
bool ExportFLACOptions::TransferDataToWindow()
{
return true;
}
///
///
bool ExportFLACOptions::TransferDataFromWindow()
{
ShuttleGui S(this, eIsSavingToPrefs);
PopulateOrExchange(S);
gPrefs->Flush();
return true;
}
//----------------------------------------------------------------------------
// ExportFLAC Class
//----------------------------------------------------------------------------
#define SAMPLES_PER_RUN 8192
/* FLACPP_API_VERSION_CURRENT is 6 for libFLAC++ from flac-1.1.3 (see <FLAC++/export.h>) */
#if !defined FLACPP_API_VERSION_CURRENT || FLACPP_API_VERSION_CURRENT < 6
#define LEGACY_FLAC
#else
#undef LEGACY_FLAC
#endif
static struct
{
bool do_exhaustive_model_search;
bool do_escape_coding;
bool do_mid_side_stereo;
bool loose_mid_side_stereo;
unsigned qlp_coeff_precision;
unsigned min_residual_partition_order;
unsigned max_residual_partition_order;
unsigned rice_parameter_search_dist;
unsigned max_lpc_order;
} flacLevels[] = {
{ false, false, false, false, 0, 2, 2, 0, 0 },
{ false, false, true, true, 0, 2, 2, 0, 0 },
{ false, false, true, false, 0, 0, 3, 0, 0 },
{ false, false, false, false, 0, 3, 3, 0, 6 },
{ false, false, true, true, 0, 3, 3, 0, 8 },
{ false, false, true, false, 0, 3, 3, 0, 8 },
{ false, false, true, false, 0, 0, 4, 0, 8 },
{ true, false, true, false, 0, 0, 6, 0, 8 },
{ true, false, true, false, 0, 0, 6, 0, 12 },
};
//----------------------------------------------------------------------------
class ExportFLAC : public ExportPlugin
{
public:
ExportFLAC();
void Destroy();
// Required
wxWindow *OptionsCreate(wxWindow *parent, int format);
int Export(AudacityProject *project,
int channels,
const wxString &fName,
bool selectedOnly,
double t0,
double t1,
MixerSpec *mixerSpec = NULL,
Tags *metadata = NULL,
int subformat = 0) override;
private:
bool GetMetadata(AudacityProject *project, Tags *tags);
FLAC__StreamMetadata *mMetadata;
};
//----------------------------------------------------------------------------
ExportFLAC::ExportFLAC()
: ExportPlugin()
{
AddFormat();
SetFormat(wxT("FLAC"),0);
AddExtension(wxT("flac"),0);
SetMaxChannels(FLAC__MAX_CHANNELS,0);
SetCanMetaData(true,0);
SetDescription(_("FLAC Files"),0);
}
void ExportFLAC::Destroy()
{
delete this;
}
int ExportFLAC::Export(AudacityProject *project,
int numChannels,
const wxString &fName,
bool selectionOnly,
double t0,
double t1,
MixerSpec *mixerSpec,
Tags *metadata,
int WXUNUSED(subformat))
{
double rate = project->GetRate();
TrackList *tracks = project->GetTracks();
wxLogNull logNo; // temporarily disable wxWidgets error messages
int updateResult = eProgressSuccess;
int levelPref;
gPrefs->Read(wxT("/FileFormats/FLACLevel"), &levelPref, 5);
wxString bitDepthPref =
gPrefs->Read(wxT("/FileFormats/FLACBitDepth"), wxT("16"));
FLAC::Encoder::File encoder;
#ifdef LEGACY_FLAC
encoder.set_filename(OSOUTPUT(fName));
#endif
encoder.set_channels(numChannels);
encoder.set_sample_rate(lrint(rate));
// See note in GetMetadata() about a bug in libflac++ 1.1.2
if (!GetMetadata(project, metadata)) {
return false;
}
if (mMetadata) {
encoder.set_metadata(&mMetadata, 1);
}
sampleFormat format;
if (bitDepthPref == wxT("24")) {
format = int24Sample;
encoder.set_bits_per_sample(24);
} else { //convert float to 16 bits
format = int16Sample;
encoder.set_bits_per_sample(16);
}
// Duplicate the flac command line compression levels
if (levelPref < 0 || levelPref > 8) {
levelPref = 5;
}
encoder.set_do_exhaustive_model_search(flacLevels[levelPref].do_exhaustive_model_search);
encoder.set_do_escape_coding(flacLevels[levelPref].do_escape_coding);
if (numChannels != 2) {
encoder.set_do_mid_side_stereo(false);
encoder.set_loose_mid_side_stereo(false);
}
else {
encoder.set_do_mid_side_stereo(flacLevels[levelPref].do_mid_side_stereo);
encoder.set_loose_mid_side_stereo(flacLevels[levelPref].loose_mid_side_stereo);
}
encoder.set_qlp_coeff_precision(flacLevels[levelPref].qlp_coeff_precision);
encoder.set_min_residual_partition_order(flacLevels[levelPref].min_residual_partition_order);
encoder.set_max_residual_partition_order(flacLevels[levelPref].max_residual_partition_order);
encoder.set_rice_parameter_search_dist(flacLevels[levelPref].rice_parameter_search_dist);
encoder.set_max_lpc_order(flacLevels[levelPref].max_lpc_order);
#ifdef LEGACY_FLAC
encoder.init();
#else
wxFFile f; // will be closed when it goes out of scope
if (!f.Open(fName, wxT("w+b"))) {
wxMessageBox(wxString::Format(_("FLAC export couldn't open %s"), fName.c_str()));
return false;
}
// Even though there is an init() method that takes a filename, use the one that
// takes a file handle because wxWidgets can open a file with a Unicode name and
// libflac can't (under Windows).
int status = encoder.init(f.fp());
if (status != FLAC__STREAM_ENCODER_INIT_STATUS_OK) {
wxMessageBox(wxString::Format(_("FLAC encoder failed to initialize\nStatus: %d"), status));
return false;
}
#endif
if (mMetadata) {
::FLAC__metadata_object_delete(mMetadata);
}
int numWaveTracks;
WaveTrack **waveTracks;
tracks->GetWaveTracks(selectionOnly, &numWaveTracks, &waveTracks);
Mixer *mixer = CreateMixer(numWaveTracks, waveTracks,
tracks->GetTimeTrack(),
t0, t1,
numChannels, SAMPLES_PER_RUN, false,
rate, format, true, mixerSpec);
delete [] waveTracks;
int i, j;
FLAC__int32 **tmpsmplbuf = new FLAC__int32*[numChannels];
for (i = 0; i < numChannels; i++) {
tmpsmplbuf[i] = (FLAC__int32 *) calloc(SAMPLES_PER_RUN, sizeof(FLAC__int32));
}
{
ProgressDialog progress(wxFileName(fName).GetName(),
selectionOnly ?
_("Exporting the selected audio as FLAC") :
_("Exporting the entire project as FLAC"));
while (updateResult == eProgressSuccess) {
sampleCount samplesThisRun = mixer->Process(SAMPLES_PER_RUN);
if (samplesThisRun == 0) { //stop encoding
break;
}
else {
for (i = 0; i < numChannels; i++) {
samplePtr mixed = mixer->GetBuffer(i);
if (format == int24Sample) {
for (j = 0; j < samplesThisRun; j++) {
tmpsmplbuf[i][j] = ((int *)mixed)[j];
}
}
else {
for (j = 0; j < samplesThisRun; j++) {
tmpsmplbuf[i][j] = ((short *)mixed)[j];
}
}
}
encoder.process(tmpsmplbuf, samplesThisRun);
}
updateResult = progress.Update(mixer->MixGetCurrentTime() - t0, t1 - t0);
}
f.Detach(); // libflac closes the file
encoder.finish();
}
for (i = 0; i < numChannels; i++) {
free(tmpsmplbuf[i]);
}
delete mixer;
delete[] tmpsmplbuf;
return updateResult;
}
wxWindow *ExportFLAC::OptionsCreate(wxWindow *parent, int format)
{
wxASSERT(parent); // to justify safenew
return safenew ExportFLACOptions(parent, format);
}
// LL: There's a bug in libflac++ 1.1.2 that prevents us from using
// FLAC::Metadata::VorbisComment directly. The set_metadata()
// function allocates an array on the stack, but the base library
// expects that array to be valid until the stream is initialized.
//
// This has been fixed in 1.1.4.
bool ExportFLAC::GetMetadata(AudacityProject *project, Tags *tags)
{
// Retrieve tags if needed
if (tags == NULL)
tags = project->GetTags();
mMetadata = ::FLAC__metadata_object_new(FLAC__METADATA_TYPE_VORBIS_COMMENT);
wxString n;
for (const auto &pair : tags->GetRange()) {
n = pair.first;
const auto &v = pair.second;
if (n == TAG_YEAR) {
n = wxT("DATE");
}
FLAC::Metadata::VorbisComment::Entry entry(n.mb_str(wxConvUTF8),
v.mb_str(wxConvUTF8));
::FLAC__metadata_object_vorbiscomment_append_comment(mMetadata,
entry.get_entry(),
true);
}
return true;
}
ExportPlugin *New_ExportFLAC()
{
return new ExportFLAC();
}
#endif // USE_LIBFLAC
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