mirror of
https://github.com/cookiengineer/audacity
synced 2026-02-09 05:01:57 +01:00
Locate and position the current Audacity source code, and clear a variety of old junk out of the way into junk-branches
This commit is contained in:
ra
467
src/export/ExportMP2.cpp
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467
src/export/ExportMP2.cpp
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/**********************************************************************
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Audacity: A Digital Audio Editor
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ExportMP2.cpp
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Joshua Haberman
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Markus Meyer
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Copyright 2002, 2003 Joshua Haberman.
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Copyright 2006 Markus Meyer
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Some portions may be Copyright 2003 Paolo Patruno.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*******************************************************************//**
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\class MP2Exporter
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\brief Class used to export MP2 files
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*/
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#include "../Audacity.h"
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#ifdef USE_LIBTWOLAME
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#include <wx/defs.h>
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#include <wx/textctrl.h>
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#include <wx/dynlib.h>
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#include <wx/msgdlg.h>
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#include <wx/utils.h>
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#include <wx/timer.h>
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#include <wx/window.h>
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#include <wx/log.h>
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#include <wx/intl.h>
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#include "Export.h"
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#include "../FileIO.h"
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#include "../Internat.h"
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#include "../Mix.h"
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#include "../Prefs.h"
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#include "../Project.h"
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#include "../Tags.h"
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#include "../WaveTrack.h"
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#define LIBTWOLAME_STATIC
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#include "twolame.h"
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#ifdef USE_LIBID3TAG
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#include <id3tag.h>
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// DM: the following functions were supposed to have been
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// included in id3tag.h - should be fixed in the next release
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// of mad.
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extern "C" {
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struct id3_frame *id3_frame_new(char const *);
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id3_length_t id3_latin1_length(id3_latin1_t const *);
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void id3_latin1_decode(id3_latin1_t const *, id3_ucs4_t *);
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}
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#endif
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//----------------------------------------------------------------------------
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// ExportMP2Options
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//----------------------------------------------------------------------------
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static int iBitrates[] = {
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16, 24, 32, 40, 48, 56, 64,
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80, 96, 112, 128, 160,
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192, 224, 256, 320, 384
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};
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class ExportMP2Options : public wxDialog
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{
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public:
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///
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///
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ExportMP2Options(wxWindow *parent);
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void PopulateOrExchange(ShuttleGui & S);
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void OnOK(wxCommandEvent& event);
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private:
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wxArrayString mBitRateNames;
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wxArrayInt mBitRateLabels;
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DECLARE_EVENT_TABLE()
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};
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BEGIN_EVENT_TABLE(ExportMP2Options, wxDialog)
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EVT_BUTTON(wxID_OK, ExportMP2Options::OnOK)
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END_EVENT_TABLE()
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///
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///
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ExportMP2Options::ExportMP2Options(wxWindow *parent)
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: wxDialog(parent, wxID_ANY,
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wxString(_("Specify MP2 Options")))
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{
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ShuttleGui S(this, eIsCreatingFromPrefs);
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for (unsigned int i=0; i < (sizeof(iBitrates)/sizeof(int)); i++)
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{
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mBitRateNames.Add(wxString::Format(wxT("%i"),iBitrates[i]));
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mBitRateLabels.Add(iBitrates[i]);
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}
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PopulateOrExchange(S);
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}
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///
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///
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void ExportMP2Options::PopulateOrExchange(ShuttleGui & S)
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{
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S.StartHorizontalLay(wxEXPAND, 0);
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{
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S.StartStatic(_("MP2 Export Setup"), 0);
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{
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S.StartTwoColumn();
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{
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S.TieChoice(_("Bit Rate:"), wxT("/FileFormats/MP2Bitrate"),
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160, mBitRateNames, mBitRateLabels);
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}
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S.EndTwoColumn();
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}
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S.EndStatic();
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}
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S.EndHorizontalLay();
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S.AddStandardButtons();
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Layout();
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Fit();
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SetMinSize(GetSize());
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Center();
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return;
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}
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///
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///
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void ExportMP2Options::OnOK(wxCommandEvent& event)
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{
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ShuttleGui S(this, eIsSavingToPrefs);
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PopulateOrExchange(S);
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EndModal(wxID_OK);
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return;
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}
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//----------------------------------------------------------------------------
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// ExportMP2
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//----------------------------------------------------------------------------
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class ExportMP2 : public ExportPlugin
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{
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public:
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ExportMP2();
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void Destroy();
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// Required
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bool DisplayOptions(wxWindow *parent, int format = 0);
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int Export(AudacityProject *project,
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int channels,
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wxString fName,
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bool selectedOnly,
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double t0,
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double t1,
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MixerSpec *mixerSpec = NULL,
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Tags *metadata = NULL,
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int subformat = 0);
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private:
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int AddTags(AudacityProject *project, char **buffer, bool *endOfFile, Tags *tags);
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};
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ExportMP2::ExportMP2()
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: ExportPlugin()
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{
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AddFormat();
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SetFormat(wxT("MP2"),0);
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AddExtension(wxT("mp2"),0);
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SetMaxChannels(2,0);
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SetCanMetaData(true,0);
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SetDescription(_("MP2 Files"),0);
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}
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void ExportMP2::Destroy()
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{
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delete this;
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}
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int ExportMP2::Export(AudacityProject *project,
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int channels, wxString fName,
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bool selectionOnly, double t0, double t1, MixerSpec *mixerSpec, Tags *metadata,
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int subformat)
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{
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bool stereo = (channels == 2);
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long bitrate = gPrefs->Read(wxT("/FileFormats/MP2Bitrate"), 160);
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double rate = project->GetRate();
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TrackList *tracks = project->GetTracks();
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wxLogNull logNo; /* temporarily disable wxWidgets error messages */
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twolame_options *encodeOptions;
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encodeOptions = twolame_init();
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twolame_set_in_samplerate(encodeOptions, (int)(rate + 0.5));
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twolame_set_out_samplerate(encodeOptions, (int)(rate + 0.5));
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twolame_set_bitrate(encodeOptions, bitrate);
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twolame_set_num_channels(encodeOptions, stereo ? 2:1);
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if (twolame_init_params(encodeOptions) != 0)
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{
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wxMessageBox(_("Cannot export MP2 with this sample rate and bit rate"),
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_("Error"), wxICON_STOP);
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return false;
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}
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// Put ID3 tags at beginning of file
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if (metadata == NULL)
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metadata = project->GetTags();
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FileIO outFile(fName, FileIO::Output);
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if (!outFile.IsOpened()) {
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wxMessageBox(_("Unable to open target file for writing"));
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return false;
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}
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char *id3buffer = NULL;
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int id3len;
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bool endOfFile;
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id3len = AddTags(project, &id3buffer, &endOfFile, metadata);
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if (id3len && !endOfFile)
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outFile.Write(id3buffer, id3len);
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// Values taken from the twolame simple encoder sample
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const int pcmBufferSize = 9216 / 2; // number of samples
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const int mp2BufferSize = 16384 ; // bytes
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// We allocate a buffer which is twice as big as the
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// input buffer, which should always be enough.
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// We have to multiply by 4 because one sample is 2 bytes wide!
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unsigned char* mp2Buffer = new unsigned char[mp2BufferSize];
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int numWaveTracks;
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WaveTrack **waveTracks;
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tracks->GetWaveTracks(selectionOnly, &numWaveTracks, &waveTracks);
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Mixer *mixer = new Mixer(numWaveTracks, waveTracks,
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tracks->GetTimeTrack(),
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t0, t1,
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stereo? 2: 1, pcmBufferSize, true,
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rate, int16Sample, true, mixerSpec);
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delete [] waveTracks;
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ProgressDialog *progress = new ProgressDialog(wxFileName(fName).GetName(),
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selectionOnly ?
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wxString::Format(_("Exporting selected audio at %d kbps"), bitrate) :
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wxString::Format(_("Exporting entire file at %d kbps"), bitrate));
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int updateResult = eProgressSuccess;
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while(updateResult == eProgressSuccess) {
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sampleCount pcmNumSamples = mixer->Process(pcmBufferSize);
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if (pcmNumSamples == 0)
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break;
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short *pcmBuffer = (short *)mixer->GetBuffer();
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int mp2BufferNumBytes = twolame_encode_buffer_interleaved(
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encodeOptions,
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pcmBuffer,
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pcmNumSamples,
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mp2Buffer,
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mp2BufferSize);
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outFile.Write(mp2Buffer, mp2BufferNumBytes);
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updateResult = progress->Update(mixer->MixGetCurrentTime()-t0, t1-t0);
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}
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delete progress;
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delete mixer;
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int mp2BufferNumBytes = twolame_encode_flush(
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encodeOptions,
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mp2Buffer,
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mp2BufferSize);
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if (mp2BufferNumBytes > 0)
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outFile.Write(mp2Buffer, mp2BufferNumBytes);
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twolame_close(&encodeOptions);
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delete[] mp2Buffer;
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/* Write ID3 tag if it was supposed to be at the end of the file */
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if (id3len && endOfFile)
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outFile.Write(id3buffer, id3len);
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if (id3buffer) {
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free(id3buffer);
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}
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/* Close file */
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outFile.Close();
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return updateResult;
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}
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bool ExportMP2::DisplayOptions(wxWindow *parent, int format)
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{
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ExportMP2Options od(parent);
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od.ShowModal();
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return true;
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}
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// returns buffer len; caller frees
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int ExportMP2::AddTags(AudacityProject *project, char **buffer, bool *endOfFile, Tags *tags)
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{
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#ifdef USE_LIBID3TAG
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struct id3_tag *tp = id3_tag_new();
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bool v2 = tags->GetID3V2();
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wxString n, v;
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for (bool cont = tags->GetFirst(n, v); cont; cont = tags->GetNext(n, v)) {
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const char *name = "TXXX";
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if (n.CmpNoCase(TAG_TITLE) == 0) {
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name = ID3_FRAME_TITLE;
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}
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else if (n.CmpNoCase(TAG_ARTIST) == 0) {
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name = ID3_FRAME_ARTIST;
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}
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else if (n.CmpNoCase(TAG_ALBUM) == 0) {
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name = ID3_FRAME_ALBUM;
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}
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else if (n.CmpNoCase(TAG_YEAR) == 0) {
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name = ID3_FRAME_YEAR;
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}
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else if (n.CmpNoCase(TAG_GENRE) == 0) {
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name = ID3_FRAME_GENRE;
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if (!v2) {
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v.Printf(wxT("%d"), tags->GetGenre(v));
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}
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}
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else if (n.CmpNoCase(TAG_COMMENTS) == 0) {
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name = ID3_FRAME_COMMENT;
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}
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else if (n.CmpNoCase(TAG_TRACK) == 0) {
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name = ID3_FRAME_TRACK;
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}
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struct id3_frame *frame = id3_frame_new(name);
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if (v2) {
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if (!n.IsAscii() || !v.IsAscii()) {
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id3_field_settextencoding(id3_frame_field(frame, 0), ID3_FIELD_TEXTENCODING_UTF_16);
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}
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else {
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id3_field_settextencoding(id3_frame_field(frame, 0), ID3_FIELD_TEXTENCODING_ISO_8859_1);
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}
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}
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id3_ucs4_t *ucs4 =
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id3_utf8_ucs4duplicate((id3_utf8_t *) (const char *) v.mb_str(wxConvUTF8));
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if (strcmp(name, ID3_FRAME_COMMENT) == 0) {
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// A hack to get around iTunes not recognizing the comment. The
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// language defaults to XXX and, since it's not a valid language,
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// iTunes just ignores the tag. So, either set it to a valid language
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// (which one???) or just clear it. Unfortunately, there's no supported
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// way of clearing the field, so do it directly.
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id3_field *f = id3_frame_field(frame, 1);
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memset(f->immediate.value, 0, sizeof(f->immediate.value));
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id3_field_setfullstring(id3_frame_field(frame, 3), ucs4);
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}
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else if (strcmp(name, "TXXX") == 0) {
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id3_field_setstring(id3_frame_field(frame, 2), ucs4);
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free(ucs4);
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ucs4 = id3_utf8_ucs4duplicate((id3_utf8_t *) (const char *) n.mb_str(wxConvUTF8));
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id3_field_setstring(id3_frame_field(frame, 1), ucs4);
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}
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else {
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id3_field_setstrings(id3_frame_field(frame, 1), 1, &ucs4);
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}
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free(ucs4);
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id3_tag_attachframe(tp, frame);
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}
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if (v2) {
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tp->options &= (~ID3_TAG_OPTION_COMPRESSION); // No compression
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// If this version of libid3tag supports it, use v2.3 ID3
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// tags instead of the newer, but less well supported, v2.4
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// that libid3tag uses by default.
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#ifdef ID3_TAG_HAS_TAG_OPTION_ID3V2_3
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tp->options |= ID3_TAG_OPTION_ID3V2_3;
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#endif
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*endOfFile = false;
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}
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else {
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tp->options |= ID3_TAG_OPTION_ID3V1;
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*endOfFile = true;
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}
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id3_length_t len;
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len = id3_tag_render(tp, 0);
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*buffer = (char *)malloc(len);
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len = id3_tag_render(tp, (id3_byte_t *)*buffer);
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id3_tag_delete(tp);
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return len;
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#else //ifdef USE_LIBID3TAG
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return 0;
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#endif
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}
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//----------------------------------------------------------------------------
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// Constructor
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//----------------------------------------------------------------------------
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ExportPlugin *New_ExportMP2()
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{
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return new ExportMP2();
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}
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#endif // #ifdef USE_LIBTWOLAME
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// Indentation settings for Vim and Emacs and unique identifier for Arch, a
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// version control system. Please do not modify past this point.
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//
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// Local Variables:
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// c-basic-offset: 3
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// indent-tabs-mode: nil
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// End:
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//
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// vim: et sts=3 sw=3
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// arch-tag: c6af56b1-37fa-4d95-b982-0a24b3a49c00
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