/*
 * Copyright (C) 2005 to 2014 by Jonathan Duddington
 * email: jonsd@users.sourceforge.net
 * Copyright (C) 2015-2017 Reece H. Dunn
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see: <http://www.gnu.org/licenses/>.
 */

#ifdef __cplusplus
extern "C"
{
#endif

#define espeakINITIALIZE_PHONEME_IPA 0x0002 // move this to speak_lib.h, after eSpeak version 1.46.02

#define N_PHONEME_LIST 1000 // enough for source[N_TR_SOURCE] full of text, else it will truncate

#define MAX_HARMONIC 400 // 400 * 50Hz = 20 kHz, more than enough
#define N_SEQ_FRAMES  25 // max frames in a spectrum sequence (real max is ablut 8)
#define STEPSIZE      64 // 2.9mS at 22 kHz sample rate

// flags set for frames within a spectrum sequence
#define FRFLAG_KLATT           0x01 // this frame includes extra data for Klatt synthesizer
#define FRFLAG_VOWEL_CENTRE    0x02 // centre point of vowel
#define FRFLAG_LEN_MOD         0x04 // reduce effect of length adjustment
#define FRFLAG_BREAK_LF        0x08 // but keep f3 upwards
#define FRFLAG_BREAK           0x10 // don't merge with next frame
#define FRFLAG_BREAK_2         0x18 // FRFLAG_BREAK_LF or FRFLAG_BREAK
#define FRFLAG_FORMANT_RATE    0x20 // Flag5 allow increased rate of change of formant freq
#define FRFLAG_MODULATE        0x40 // Flag6 modulate amplitude of some cycles to give trill
#define FRFLAG_DEFER_WAV       0x80 // Flag7 defer mixing WAV until the next frame
#define FRFLAG_LEN_MOD2      0x4000 // reduce effect of length adjustment, used for the start of a vowel
#define FRFLAG_COPIED        0x8000 // This frame has been copied into temporary rw memory

#define SFLAG_SEQCONTINUE      0x01 // a liquid or nasal after a vowel, but not followed by a vowel
#define SFLAG_EMBEDDED         0x02 // there are embedded commands before this phoneme
#define SFLAG_SYLLABLE         0x04 // vowel or syllabic consonant
#define SFLAG_LENGTHEN         0x08 // lengthen symbol : included after this phoneme
#define SFLAG_DICTIONARY       0x10 // the pronunciation of this word was listed in the xx_list dictionary
#define SFLAG_SWITCHED_LANG    0x20 // this word uses phonemes from a different language
#define SFLAG_PROMOTE_STRESS   0x40 // this unstressed word can be promoted to stressed

#define SFLAG_PREV_PAUSE     0x1000 // consider previous phoneme as pause
#define SFLAG_NEXT_PAUSE     0x2000 // consider next phoneme as pause

// embedded command numbers
#define EMBED_P     1 // pitch
#define EMBED_S     2 // speed (used in setlengths)
#define EMBED_A     3 // amplitude/volume
#define EMBED_R     4 // pitch range/expression
#define EMBED_H     5 // echo/reverberation
#define EMBED_T     6 // different tone for announcing punctuation (not used)
#define EMBED_I     7 // sound icon
#define EMBED_S2    8 // speed (used in synthesize)
#define EMBED_Y     9 // say-as commands
#define EMBED_M    10 // mark name
#define EMBED_U    11 // audio uri
#define EMBED_B    12 // break
#define EMBED_F    13 // emphasis
#define EMBED_C    14 // capital letter indication

#define N_EMBEDDED_VALUES    15
extern int embedded_value[N_EMBEDDED_VALUES];
extern int embedded_default[N_EMBEDDED_VALUES];

#define N_PEAKS   9
#define N_PEAKS2  9 // plus Notch and Fill (not yet implemented)
#define N_MARKERS 8

#define N_KLATTP   10 // this affects the phoneme data file format
#define N_KLATTP2  14 // used in vowel files, with extra parameters for future extensions

#define KLATT_AV      0
#define KLATT_FNZ     1 // nasal zero freq
#define KLATT_Tilt    2
#define KLATT_Aspr    3
#define KLATT_Skew    4

#define KLATT_Kopen   5
#define KLATT_AVp     6
#define KLATT_Fric    7
#define KLATT_FricBP  8
#define KLATT_Turb    9

typedef struct { // 64 bytes
	short frflags;
	short ffreq[7];
	unsigned char length;
	unsigned char rms;
	unsigned char fheight[8];
	unsigned char fwidth[6];   // width/4  f0-5
	unsigned char fright[3];   // width/4  f0-2
	unsigned char bw[4];       // Klatt bandwidth BNZ /2, f1,f2,f3
	unsigned char klattp[5];   // AV, FNZ, Tilt, Aspr, Skew
	unsigned char klattp2[5];  // continuation of klattp[],  Avp, Fric, FricBP, Turb
	unsigned char klatt_ap[7]; // Klatt parallel amplitude
	unsigned char klatt_bp[7]; // Klatt parallel bandwidth  /2
	unsigned char spare;       // pad to multiple of 4 bytes
} frame_t; // with extra Klatt parameters for parallel resonators

typedef struct { // 44 bytes
	short frflags;
	short ffreq[7];
	unsigned char length;
	unsigned char rms;
	unsigned char fheight[8];
	unsigned char fwidth[6];  // width/4  f0-5
	unsigned char fright[3];  // width/4  f0-2
	unsigned char bw[4];      // Klatt bandwidth BNZ /2, f1,f2,f3
	unsigned char klattp[5];  // AV, FNZ, Tilt, Aspr, Skew
} frame_t2; // without the extra Klatt parameters

// formant data used by wavegen
typedef struct {
	int freq;     // Hz<<16
	int height;   // height<<15
	int left;     // Hz<<16
	int right;    // Hz<<16
	DOUBLEX freq1; // floating point versions of the above
	DOUBLEX height1;
	DOUBLEX left1;
	DOUBLEX right1;
	DOUBLEX freq_inc; // increment by this every 64 samples
	DOUBLEX height_inc;
	DOUBLEX left_inc;
	DOUBLEX right_inc;
} wavegen_peaks_t;

typedef struct {
	unsigned char *pitch_env;
	int pitch;      // pitch Hz*256
	int pitch_ix;   // index into pitch envelope (*256)
	int pitch_inc;  // increment to pitch_ix
	int pitch_base; // Hz*256 low, before modified by envelope
	int pitch_range; // Hz*256 range of envelope

	unsigned char *mix_wavefile; // wave file to be added to synthesis
	int n_mix_wavefile; // length in bytes
	int mix_wave_scale; // 0=2 byte samples
	int mix_wave_amp;
	int mix_wavefile_ix;
	int mix_wavefile_max; // length of available WAV data (in bytes)
	int mix_wavefile_offset;

	int amplitude;
	int amplitude_v;
	int amplitude_fmt; // percentage amplitude adjustment for formant synthesis
} WGEN_DATA;

typedef struct {
	double a;
	double b;
	double c;
	double x1;
	double x2;
} RESONATOR;

typedef struct {
	short length_total; // not used
	unsigned char n_frames;
	unsigned char sqflags;
	frame_t2 frame[N_SEQ_FRAMES]; // max. frames in a spectrum sequence
} SPECT_SEQ; // sequence of espeak formant frames

typedef struct {
	short length_total; // not used
	unsigned char n_frames;
	unsigned char sqflags;
	frame_t frame[N_SEQ_FRAMES]; // max. frames in a spectrum sequence
} SPECT_SEQK; // sequence of klatt formants frames

typedef struct {
	short length;
	short frflags;
	frame_t *frame;
} frameref_t;

// a clause translated into phoneme codes (first stage)
typedef struct {
	unsigned short synthflags; // NOTE Put shorts on 32bit boundaries, because of RISC OS compiler bug?
	unsigned char phcode;
	unsigned char stresslevel;
	unsigned short sourceix;  // ix into the original source text string, only set at the start of a word
	unsigned char wordstress; // the highest level stress in this word
	unsigned char tone_ph;    // tone phoneme to use with this vowel
} PHONEME_LIST2;

typedef struct {
	// The first section is a copy of PHONEME_LIST2
	unsigned short synthflags;
	unsigned char phcode;
	unsigned char stresslevel;
	unsigned short sourceix;  // ix into the original source text string, only set at the start of a word
	unsigned char wordstress; // the highest level stress in this word
	unsigned char tone_ph;    // tone phoneme to use with this vowel

	PHONEME_TAB *ph;
	unsigned int length;  // length_mod
	unsigned char env;    // pitch envelope number
	unsigned char type;
	unsigned char prepause;
	unsigned char postpause;
	unsigned char amp;
	unsigned char newword;   // bit 0=start of word, bit 1=end of clause, bit 2=start of sentence
	unsigned char pitch1;
	unsigned char pitch2;
	unsigned char std_length;
	unsigned int phontab_addr;
	int sound_param;
} PHONEME_LIST;

#define pd_FMT    0
#define pd_WAV    1
#define pd_VWLSTART 2
#define pd_VWLEND 3
#define pd_ADDWAV 4

#define N_PHONEME_DATA_PARAM 16
#define pd_INSERTPHONEME   i_INSERT_PHONEME
#define pd_APPENDPHONEME   i_APPEND_PHONEME
#define pd_CHANGEPHONEME   i_CHANGE_PHONEME
#define pd_CHANGE_NEXTPHONEME  i_REPLACE_NEXT_PHONEME
#define pd_LENGTHMOD       i_SET_LENGTH

#define pd_FORNEXTPH     0x2
#define pd_DONTLENGTHEN  0x4
#define pd_REDUCELENGTHCHANGE 0x8
typedef struct {
	int pd_control;
	int pd_param[N_PHONEME_DATA_PARAM];  // set from group 0 instructions
	int sound_addr[5];
	int sound_param[5];
	int vowel_transition[4];
	int pitch_env;
	int amp_env;
	char ipa_string[18];
} PHONEME_DATA;

typedef struct {
	int fmt_control;
	int use_vowelin;
	int fmt_addr;
	int fmt_length;
	int fmt_amp;
	int fmt2_addr;
	int fmt2_lenadj;
	int wav_addr;
	int wav_amp;
	int transition0;
	int transition1;
	int std_length;
} FMT_PARAMS;

typedef struct {
	PHONEME_LIST prev_vowel;
} WORD_PH_DATA;

// instructions

#define OPCODE_RETURN        0x0001
#define OPCODE_CONTINUE      0x0002

// Group 0 instrcutions with 8 bit operand.  These values go into bits 8-15 of the instruction
#define i_CHANGE_PHONEME 0x01
#define i_REPLACE_NEXT_PHONEME 0x02
#define i_INSERT_PHONEME 0x03
#define i_APPEND_PHONEME 0x04
#define i_APPEND_IFNEXTVOWEL 0x05
#define i_VOICING_SWITCH 0x06
#define i_PAUSE_BEFORE   0x07
#define i_PAUSE_AFTER    0x08
#define i_LENGTH_MOD     0x09
#define i_SET_LENGTH     0x0a
#define i_LONG_LENGTH    0x0b
#define i_ADD_LENGTH     0x0c
#define i_IPA_NAME       0x0d

#define i_CHANGE_IF      0x10  // 0x10 to 0x14

// conditions and jumps
#define i_CONDITION  0x2000
#define i_OR         0x1000  // added to i_CONDITION
#define i_NOT        0x0003

#define i_JUMP       0x6000
#define i_JUMP_FALSE 0x6800
#define i_SWITCH_NEXTVOWEL 0x6a00
#define i_SWITCH_PREVVOWEL 0x6c00
#define MAX_JUMP     255  // max jump distance

// multi-word instructions
#define i_CALLPH     0x9100
#define i_PITCHENV   0x9200
#define i_AMPENV     0x9300
#define i_VOWELIN    0xa100
#define i_VOWELOUT   0xa200
#define i_FMT        0xb000
#define i_WAV        0xc000
#define i_VWLSTART   0xd000
#define i_VWLENDING  0xe000
#define i_WAVADD     0xf000

// conditions
#define CONDITION_IS_PHONEME_TYPE 0x00
#define CONDITION_IS_PLACE_OF_ARTICULATION 0x20
#define CONDITION_IS_PHFLAG_SET 0x40
#define CONDITION_IS_OTHER 0x80

// other conditions (stress)
#define isDiminished   0
#define isUnstressed   1
#define isNotStressed  2
#define isStressed     3
#define isMaxStress    4

// other conditions
#define isBreak        5 // pause phoneme or (stop/vstop/vfric not followed by vowel or (liquid in same word))
#define isWordStart    6
#define isWordEnd      8
#define isAfterStress  9
#define isNotVowel    10
#define isFinalVowel  11
#define isVoiced      12 // voiced consonant, or vowel
#define isFirstVowel  13
#define isSecondVowel 14
#define isTranslationGiven 16 // phoneme translation given in **_list or as [[...]]

#define i_StressLevel  0x800

typedef struct {
	int name;
	int length;
	char *data;
	char *filename;
} SOUND_ICON;

typedef struct {
	int name;
	unsigned int next_phoneme;
	int mbr_name;
	int mbr_name2;
	int percent; // percentage length of first component
	int control;
} MBROLA_TAB;

typedef struct {
	int pause_factor;
	int clause_pause_factor;
	unsigned int min_pause;
	int wav_factor;
	int lenmod_factor;
	int lenmod2_factor;
	int min_sample_len;
	int loud_consonants;
	int fast_settings[8];
} SPEED_FACTORS;

typedef struct {
	char name[12];
	unsigned char flags[4];
	signed char head_extend[8];

	unsigned char prehead_start;
	unsigned char prehead_end;
	unsigned char stressed_env;
	unsigned char stressed_drop;
	unsigned char secondary_drop;
	unsigned char unstressed_shape;

	unsigned char onset;
	unsigned char head_start;
	unsigned char head_end;
	unsigned char head_last;

	unsigned char head_max_steps;
	unsigned char n_head_extend;

	signed char unstr_start[3]; // for: onset, head, last
	signed char unstr_end[3];

	unsigned char nucleus0_env; // pitch envelope, tonic syllable is at end, no tail
	unsigned char nucleus0_max;
	unsigned char nucleus0_min;

	unsigned char nucleus1_env; // when followed by a tail
	unsigned char nucleus1_max;
	unsigned char nucleus1_min;
	unsigned char tail_start;
	unsigned char tail_end;

	unsigned char split_nucleus_env;
	unsigned char split_nucleus_max;
	unsigned char split_nucleus_min;
	unsigned char split_tail_start;
	unsigned char split_tail_end;
	unsigned char split_tune;

	unsigned char spare[8];
	int spare2; // the struct length should be a multiple of 4 bytes
} TUNE;

extern int n_tunes;
extern TUNE *tunes;

// phoneme table
extern PHONEME_TAB *phoneme_tab[N_PHONEME_TAB];

// list of phonemes in a clause
extern int n_phoneme_list;
extern PHONEME_LIST phoneme_list[N_PHONEME_LIST+1];
extern unsigned int embedded_list[];

extern unsigned char env_fall[128];
extern unsigned char env_rise[128];
extern unsigned char env_frise[128];

#define MAX_PITCH_VALUE  101
extern unsigned char pitch_adjust_tab[MAX_PITCH_VALUE+1];

// queue of commands for wavegen
#define WCMD_KLATT  1
#define WCMD_KLATT2 2
#define WCMD_SPECT  3
#define WCMD_SPECT2 4
#define WCMD_PAUSE  5
#define WCMD_WAVE    6
#define WCMD_WAVE2   7
#define WCMD_AMPLITUDE 8
#define WCMD_PITCH  9
#define WCMD_MARKER 10
#define WCMD_VOICE   11
#define WCMD_EMBEDDED 12
#define WCMD_MBROLA_DATA 13
#define WCMD_FMT_AMPLITUDE 14
#define WCMD_SONIC_SPEED 15

#define N_WCMDQ   170
#define MIN_WCMDQ  25   // need this many free entries before adding new phoneme

extern intptr_t wcmdq[N_WCMDQ][4];
extern int wcmdq_head;
extern int wcmdq_tail;

// from Wavegen file
int  WcmdqFree();
void WcmdqStop();
int  WcmdqUsed();
void WcmdqInc();
void WavegenInit(int rate, int wavemult_fact);
float polint(float xa[], float ya[], int n, float x);
int WavegenFill();
void MarkerEvent(int type, unsigned int char_position, int value, int value2, unsigned char *out_ptr);

extern unsigned char *wavefile_data;
extern int samplerate;
extern int samplerate_native;

extern int wavefile_ix;
extern int wavefile_amp;
extern int wavefile_ix2;
extern int wavefile_amp2;
extern int vowel_transition[4];
extern int vowel_transition0, vowel_transition1;

#define N_ECHO_BUF 5500   // max of 250mS at 22050 Hz
extern int echo_head;
extern int echo_tail;
extern int echo_amp;
extern short echo_buf[N_ECHO_BUF];

extern int mbrola_delay;
extern char mbrola_name[20];

// from synthdata file
unsigned int LookupSound(PHONEME_TAB *ph1, PHONEME_TAB *ph2, int which, int *match_level, int control);
frameref_t *LookupSpect(PHONEME_TAB *this_ph, int which, FMT_PARAMS *fmt_params,  int *n_frames, PHONEME_LIST *plist);

unsigned char *LookupEnvelope(int ix);
espeak_ng_STATUS LoadPhData(int *srate, espeak_ng_ERROR_CONTEXT *context);

void SynthesizeInit(void);
int  Generate(PHONEME_LIST *phoneme_list, int *n_ph, int resume);
void MakeWave2(PHONEME_LIST *p, int n_ph);
int  SpeakNextClause(int control);
void SetSpeed(int control);
void SetEmbedded(int control, int value);
void SelectPhonemeTable(int number);
int  SelectPhonemeTableName(const char *name);

void Write4Bytes(FILE *f, int value);
int Read4Bytes(FILE *f);
int Reverse4Bytes(int word);

#define ENV_LEN  128    // length of pitch envelopes
#define PITCHfall   0  // standard pitch envelopes
#define PITCHrise   2
#define N_ENVELOPE_DATA   20
extern unsigned char *envelope_data[N_ENVELOPE_DATA];

extern int formant_rate[];         // max rate of change of each formant
extern SPEED_FACTORS speed;

extern long count_samples;
extern unsigned char *out_ptr;
extern unsigned char *out_start;
extern unsigned char *out_end;
extern int event_list_ix;
extern espeak_EVENT *event_list;
extern t_espeak_callback *synth_callback;
extern const char *version_string;
extern const int version_phdata;
extern double sonicSpeed;

#define N_SOUNDICON_TAB  80   // total entries in soundicon_tab
#define N_SOUNDICON_SLOTS 4    // number of slots reserved for dynamic loading of audio files
extern int n_soundicon_tab;
extern SOUND_ICON soundicon_tab[N_SOUNDICON_TAB];

espeak_ng_STATUS LoadMbrolaTable(const char *mbrola_voice, const char *phtrans, int *srate);
espeak_ng_STATUS SetParameter(int parameter, int value, int relative);
int MbrolaTranslate(PHONEME_LIST *plist, int n_phonemes, int resume, FILE *f_mbrola);
int MbrolaGenerate(PHONEME_LIST *phoneme_list, int *n_ph, int resume);
int MbrolaFill(int length, int resume, int amplitude);
void MbrolaReset(void);
void DoEmbedded(int *embix, int sourceix);
void DoMarker(int type, int char_posn, int length, int value);
void DoPhonemeMarker(int type, int char_posn, int length, char *name);
int DoSample3(PHONEME_DATA *phdata, int length_mod, int amp);
int DoSpect2(PHONEME_TAB *this_ph, int which, FMT_PARAMS *fmt_params,  PHONEME_LIST *plist, int modulation);
int PauseLength(int pause, int control);
int LookupPhonemeTable(const char *name);
unsigned char *GetEnvelope(int index);
int NumInstnWords(USHORT *prog);

void InitBreath(void);

void KlattInit();
void KlattReset(int control);
int Wavegen_Klatt2(int length, int resume, frame_t *fr1, frame_t *fr2);

#ifdef __cplusplus
}
#endif
