257 lines
8.3 KiB
C++
257 lines
8.3 KiB
C++
//=============================================================================
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// MuseScore
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// Linux Music Score Editor
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//
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// Copyright (C) 2011 Werner Schweer and others
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//
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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 version 2.
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//
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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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//
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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//=============================================================================
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#ifndef __EXPORTMP3_H__
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#define __EXPORTMP3_H__
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#include "globals.h"
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#include "lame/lame.h"
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#if defined(Q_OS_WIN)
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#include "windows.h"
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#endif
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namespace Ms {
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//----------------------------------------------------------------------------
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// ExportMP3Options
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//----------------------------------------------------------------------------
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#define MODE_SET 0
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#define MODE_VBR 1
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#define MODE_ABR 2
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#define MODE_CBR 3
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#define CHANNEL_JOINT 0
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#define CHANNEL_STEREO 1
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#define QUALITY_0 0
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#define QUALITY_1 1
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#define QUALITY_2 2
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#define QUALITY_3 3
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#define QUALITY_4 4
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#define QUALITY_5 5
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#define QUALITY_6 6
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#define QUALITY_7 7
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#define QUALITY_8 8
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#define QUALITY_9 9
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#define ROUTINE_FAST 0
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#define ROUTINE_STANDARD 1
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#define PRESET_INSANE 0
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#define PRESET_EXTREME 1
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#define PRESET_STANDARD 2
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#define PRESET_MEDIUM 3
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//----------------------------------------------------------------------------
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// MP3Exporter
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//----------------------------------------------------------------------------
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typedef lame_global_flags *lame_init_t(void);
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typedef int lame_init_params_t(lame_global_flags*);
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typedef const char* get_lame_version_t(void);
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typedef int lame_encode_buffer_float_t (
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lame_global_flags* gf,
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const float buffer_l [],
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const float buffer_r [],
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const int nsamples,
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unsigned char * mp3buf,
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const int mp3buf_size );
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typedef int lame_encode_flush_t(
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lame_global_flags *gf,
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unsigned char* mp3buf,
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int size );
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typedef int lame_close_t(lame_global_flags*);
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typedef int lame_set_in_samplerate_t(lame_global_flags*, int);
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typedef int lame_set_out_samplerate_t(lame_global_flags*, int);
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typedef int lame_set_num_channels_t(lame_global_flags*, int );
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typedef int lame_set_quality_t(lame_global_flags*, int);
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typedef int lame_set_brate_t(lame_global_flags*, int);
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typedef int lame_set_VBR_t(lame_global_flags *, vbr_mode);
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typedef int lame_set_VBR_q_t(lame_global_flags *, int);
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typedef int lame_set_VBR_min_bitrate_kbps_t(lame_global_flags *, int);
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typedef int lame_set_mode_t(lame_global_flags *, MPEG_mode);
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typedef int lame_set_preset_t(lame_global_flags *, int);
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typedef int lame_set_error_protection_t(lame_global_flags *, int);
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typedef int lame_set_disable_reservoir_t(lame_global_flags *, int);
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typedef int lame_set_padding_type_t(lame_global_flags *, Padding_type);
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typedef int lame_set_bWriteVbrTag_t(lame_global_flags *, int);
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typedef size_t lame_get_lametag_frame_t(const lame_global_flags *, unsigned char* buffer, size_t size);
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typedef void lame_mp3_tags_fid_t(lame_global_flags *, FILE *);
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#if defined(Q_OS_WIN)
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// An alternative solution to give Windows an additional chance of writing the tag before
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// falling bato to lame_mp3_tag_fid(). The latter can have DLL sharing issues when mixing
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// Debug/Release builds of Audacity and the lame DLL.
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typedef unsigned long beWriteInfoTag_t(lame_global_flags *, char *);
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// We use this to determine if the user has selected an older, Blade API only, lame_enc.dll
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// so we can be more specific about why their library isn't acceptable.
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typedef struct {
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// BladeEnc DLL Version number
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BYTE byDLLMajorVersion;
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BYTE byDLLMinorVersion;
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// BladeEnc Engine Version Number
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BYTE byMajorVersion;
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BYTE byMinorVersion;
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// DLL Release date
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BYTE byDay;
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BYTE byMonth;
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WORD wYear;
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// BladeEnc Homepage URL
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CHAR zHomepage[129];
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BYTE byAlphaLevel;
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BYTE byBetaLevel;
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BYTE byMMXEnabled;
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BYTE btReserved[125];
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} be_version;
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typedef void beVersion_t(be_version *);
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#endif
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//---------------------------------------------------------
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// MP3Exporter
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//---------------------------------------------------------
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class MP3Exporter {
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public:
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enum class AskUser : char { NO, MAYBE, YES };
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MP3Exporter();
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virtual ~MP3Exporter();
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bool findLibrary();
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bool loadLibrary(AskUser askuser);
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bool validLibraryLoaded();
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/* These global settings keep state over the life of the object */
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void setMode(int mode);
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void setBitrate(int rate);
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void setQuality(int q, int r);
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void setChannel(int mode);
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/* Virtual methods that must be supplied by library interfaces */
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/* initialize the library interface */
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bool initLibrary(QString libpath);
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void freeLibrary();
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/* get library info */
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QString getLibraryVersion();
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QString getLibraryName();
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QString getLibraryPath();
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QString getLibraryTypeString();
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/* returns the number of samples PER CHANNEL to send for each call to EncodeBuffer */
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int initializeStream(int channels, int sampleRate);
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/* In bytes. must be called AFTER InitializeStream */
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int getOutBufferSize();
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/* returns the number of bytes written. input is separate per channel */
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void bufferPreamp(float buffer[], int nSamples);
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int encodeBuffer(float inbufferL[], float inbufferR[], unsigned char outbuffer[]);
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int encodeRemainder(float inbufferL[], float inbufferR[], int nSamples,
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unsigned char outbuffer[]);
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int encodeBufferMono(float inbuffer[], unsigned char outbuffer[]);
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int encodeRemainderMono(float inbuffer[], int nSamples,
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unsigned char outbuffer[]);
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int finishStream(unsigned char outbuffer[]);
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void cancelEncoding();
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// void PutInfoTag(QFile f, qint64 off);
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private:
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QString mLibPath;
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QLibrary* lame_lib;
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bool mLibraryLoaded;
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#if defined(Q_OS_WIN)
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QString mBladeVersion;
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#endif
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bool mEncoding;
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int mMode;
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int mBitrate;
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int mQuality;
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int mRoutine;
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int mChannel;
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/* function pointers to the symbols we get from the library */
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lame_init_t* lame_init;
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lame_init_params_t* lame_init_params;
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lame_encode_buffer_float_t* lame_encode_buffer_float;
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lame_encode_flush_t* lame_encode_flush;
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lame_close_t* lame_close;
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get_lame_version_t* get_lame_version;
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lame_set_in_samplerate_t* lame_set_in_samplerate;
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lame_set_out_samplerate_t* lame_set_out_samplerate;
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lame_set_num_channels_t* lame_set_num_channels;
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lame_set_quality_t* lame_set_quality;
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lame_set_brate_t* lame_set_brate;
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lame_set_VBR_t* lame_set_VBR;
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lame_set_VBR_q_t* lame_set_VBR_q;
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lame_set_VBR_min_bitrate_kbps_t* lame_set_VBR_min_bitrate_kbps;
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lame_set_mode_t* lame_set_mode;
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lame_set_preset_t* lame_set_preset;
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lame_set_error_protection_t* lame_set_error_protection;
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lame_set_disable_reservoir_t *lame_set_disable_reservoir;
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lame_set_padding_type_t *lame_set_padding_type;
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lame_set_bWriteVbrTag_t *lame_set_bWriteVbrTag;
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lame_get_lametag_frame_t *lame_get_lametag_frame;
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lame_mp3_tags_fid_t *lame_mp3_tags_fid;
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#if defined(Q_OS_WIN)
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beWriteInfoTag_t *beWriteInfoTag;
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beVersion_t *beVersion;
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#endif
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lame_global_flags *mGF;
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static const int mSamplesPerChunk = 220500;
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// See lame.h/lame_encode_buffer() for further explanation
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// As coded here, this should be the worst case.
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static const int mOutBufferSize =
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mSamplesPerChunk * (320 / 8) / 8 + 4 * 1152 * (320 / 8) / 8 + 512;
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// See MAXFRAMESIZE in libmp3lame/VbrTag.c for explanation of 2880.
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unsigned char mInfoTagBuf[2880];
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size_t mInfoTagLen;
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};
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} // namespace Ms
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#endif //__EXPORTMP3_H__
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