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pwm-player-melody.cpp
1835 lines (1642 loc) · 49.7 KB
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pwm-player-melody.cpp
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/*
* iMelody/eMelody parser and player
* Copyright (C) 2022 MaxWolf d5713fb35e03d9aa55881eaa23f86fb6f09982ed4da2a59410639a1c9d35bfbf
* based on https://raw.githubusercontent.com/id-Software/DOOM-IOS2/master/common/embeddedaudiosynthesis/arm-fm-22k/lib_src/eas_imelody.c (see below)
* # SPDX-License-Identifier: Apache-2.0
*/
/*----------------------------------------------------------------------------
*
* File:
* eas_imelody.c
*
* Contents and purpose:
* iMelody parser
*
* Copyright Sonic Network Inc. 2005
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*----------------------------------------------------------------------------
* Revision Control:
* #Revision: 797 #
* #Date: 2007-08-01 00:15:56 -0700 (Wed, 01 Aug 2007) #
*----------------------------------------------------------------------------
*/
#include <stdio.h>
#include <stdlib.h>
#include <memory.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#include "pwm-player.h"
__attribute__ ((used)) static char s_RCSVersion[] = "$Id: pwm-player-melody.cpp 285 2022-12-31 14:56:40Z maxwolf $";
__attribute__ ((used)) static char s_RCSsrc[] = "https://github.com/sthamster/pwm-player";
// #define _DEBUG_IMELODY
////////////////////////////////////////////////////////////////////////////
//
// various excerpts and substitutions for external code
//
#define EAS_SUCCESS 0
#define EAS_FAILURE -1
#define EAS_ERROR_INVALID_MODULE -2
#define EAS_ERROR_MALLOC_FAILED -3
#define EAS_ERROR_FILE_POS -4
#define EAS_ERROR_INVALID_FILE_MODE -5
#define EAS_ERROR_FILE_SEEK -6
#define EAS_ERROR_FILE_LENGTH -7
#define EAS_ERROR_NOT_IMPLEMENTED -8
#define EAS_ERROR_CLOSE_FAILED -9
#define EAS_ERROR_FILE_OPEN_FAILED -10
#define EAS_ERROR_INVALID_HANDLE -11
#define EAS_ERROR_NO_MIX_BUFFER -12
#define EAS_ERROR_PARAMETER_RANGE -13
#define EAS_ERROR_MAX_FILES_OPEN -14
#define EAS_ERROR_UNRECOGNIZED_FORMAT -15
#define EAS_BUFFER_SIZE_MISMATCH -16
#define EAS_ERROR_FILE_FORMAT -17
#define EAS_ERROR_SMF_NOT_INITIALIZED -18
#define EAS_ERROR_LOCATE_BEYOND_END -19
#define EAS_ERROR_INVALID_PCM_TYPE -20
#define EAS_ERROR_MAX_PCM_STREAMS -21
#define EAS_ERROR_NO_VOICE_ALLOCATED -22
#define EAS_ERROR_INVALID_CHANNEL -23
#define EAS_ERROR_ALREADY_STOPPED -24
#define EAS_ERROR_FILE_READ_FAILED -25
#define EAS_ERROR_HANDLE_INTEGRITY -26
#define EAS_ERROR_MAX_STREAMS_OPEN -27
#define EAS_ERROR_INVALID_PARAMETER -28
#define EAS_ERROR_FEATURE_NOT_AVAILABLE -29
#define EAS_ERROR_SOUND_LIBRARY -30
#define EAS_ERROR_NOT_VALID_IN_THIS_STATE -31
#define EAS_ERROR_NO_VIRTUAL_SYNTHESIZER -32
#define EAS_ERROR_FILE_ALREADY_OPEN -33
#define EAS_ERROR_FILE_ALREADY_CLOSED -34
#define EAS_ERROR_INCOMPATIBLE_VERSION -35
#define EAS_ERROR_QUEUE_IS_FULL -36
#define EAS_ERROR_QUEUE_IS_EMPTY -37
#define EAS_ERROR_FEATURE_ALREADY_ACTIVE -38
#define EAS_FALSE 0
#define EAS_TRUE 1
#define EAS_EOF 3
typedef unsigned char EAS_U8;
typedef signed char EAS_I8;
typedef char EAS_CHAR;
typedef unsigned short EAS_U16;
typedef short EAS_I16;
typedef unsigned int EAS_U32;
typedef int EAS_I32;
typedef int EAS_INT;
typedef int EAS_RESULT;
typedef int EAS_BOOL;
typedef int EAS_STATE;
typedef int E_EAS_METADATA_TYPE;
typedef void* EAS_VOID_PTR;
//dummy values
#define EAS_FILE_IMELODY 1
#define EAS_METADATA_TITLE 1
#define EAS_METADATA_AUTHOR 1
typedef struct {
char fname[PATH_MAX];
char *buf;
char *pos;
int len;
} MEM_FILE_HANDLE;
int GetFile(const char *fileName, MEM_FILE_HANDLE *fh) {
FILE *f = NULL;
size_t fsize;
strncpy(fh->fname, fileName, sizeof(fh->fname) - 1);
if ((f = fopen(fileName, "rb")) == NULL) {
return EAS_ERROR_FILE_OPEN_FAILED;
}
if (fseek(f, 0, SEEK_END) != 0) {
fclose(f);
return EAS_ERROR_FILE_SEEK;
}
fsize = ftell(f);
if (fsize > INT_MAX) {
fclose(f);
return EAS_ERROR_FILE_LENGTH;
}
fh->buf = (char*)malloc(fsize);
if (fh->buf == NULL) {
fclose(f);
return EAS_ERROR_MALLOC_FAILED;
}
if (fseek(f, 0, SEEK_SET) != 0) {
fclose(f);
return EAS_ERROR_FILE_SEEK;
}
if (fread(fh->buf, 1, fsize, f) != fsize) {
fclose(f);
free(fh->buf);
return EAS_ERROR_FILE_LENGTH;
}
fclose(f);
fh->len = (int)fsize;
fh->pos = fh->buf;
return EAS_SUCCESS;
}
int GetString(const char *str, MEM_FILE_HANDLE *fh) {
int sl = strlen(str);
fh->buf = (char*)malloc(sl + 1);
if (fh->buf == NULL) {
return EAS_ERROR_MALLOC_FAILED;
}
strcpy(fh->buf, str);
fh->len = sl;
fh->pos = fh->buf;
strcpy(fh->fname, "string");
return EAS_SUCCESS;
}
int EAS_HWGetByte(MEM_FILE_HANDLE *fh, EAS_I8 *c) {
if (fh->pos - fh->buf >= fh->len) {
return EAS_EOF;
}
if (c) {
*c = (EAS_I8)*(fh->pos);
}
++(fh->pos);
return EAS_SUCCESS;
}
int EAS_HWFilePos(MEM_FILE_HANDLE *fh, int *pos) {
if (pos) {
*pos = (fh->pos - fh->buf);
}
return EAS_SUCCESS;
}
int EAS_HWFileSeek(MEM_FILE_HANDLE *fh, int offset) {
if (offset >= fh->len) {
return EAS_ERROR_FILE_SEEK;
} else {
fh->pos = fh->buf + offset;
return EAS_SUCCESS;
}
}
int EAS_HWCloseFile(MEM_FILE_HANDLE *fh) {
free(fh->buf); fh->buf = NULL;
fh->pos = 0;
fh->len = 0;
return EAS_SUCCESS;
}
typedef enum
{
eParserModePlay,
eParserModeLocate,
eParserModeMute,
eParserModeMetaData
} E_PARSE_MODE;
typedef enum
{
EAS_STATE_READY = 0,
EAS_STATE_PLAY,
EAS_STATE_STOPPING,
EAS_STATE_PAUSING,
EAS_STATE_STOPPED,
EAS_STATE_PAUSED,
EAS_STATE_OPEN,
EAS_STATE_ERROR,
EAS_STATE_EMPTY
} E_EAS_STATE;
typedef enum
{
PARSER_DATA_FILE_TYPE,
PARSER_DATA_PLAYBACK_RATE,
PARSER_DATA_TRANSPOSITION,
PARSER_DATA_VOLUME,
PARSER_DATA_SYNTH_HANDLE,
PARSER_DATA_METADATA_CB,
PARSER_DATA_DLS_COLLECTION,
PARSER_DATA_EAS_LIBRARY,
PARSER_DATA_POLYPHONY,
PARSER_DATA_PRIORITY,
PARSER_DATA_FORMAT,
PARSER_DATA_MEDIA_LENGTH,
PARSER_DATA_JET_CB,
PARSER_DATA_MUTE_FLAGS,
PARSER_DATA_SET_MUTE,
PARSER_DATA_CLEAR_MUTE,
PARSER_DATA_NOTE_COUNT,
PARSER_DATA_MAX_PCM_STREAMS,
PARSER_DATA_GAIN_OFFSET,
PARSER_DATA_PLAY_MODE
} E_PARSER_DATA;
/* maximum line size as specified in iMelody V1.2 spec */
#define MAX_LINE_SIZE 75
/*----------------------------------------------------------------------------
*
* S_IMELODY_DATA
*
* This structure contains the state data for the iMelody parser
*----------------------------------------------------------------------------
*/
typedef struct
{
MEM_FILE_HANDLE* fileHandle; /* file handle */
char subType; /* either 'I'melody or 'E'melody format */
int octaveShift; /* EMelody octave shift for a next note (+1 or +2) */
char durationEMY; /* EMelody duration ('1' or '3') */
EAS_I32 fileOffset; /* offset to start of data */
EAS_I32 time; /* current time in 256ths of a msec */
EAS_I32 tickBase; /* basline length of 32nd note in 256th of a msec */
EAS_I32 tick; /* actual length of 32nd note in 256th of a msec */
EAS_I32 restTicks; /* ticks to rest after current note */
int startLine; /* file offset at start of line (for repeats) */
int repeatOffset; /* file offset to start of repeat section */
EAS_I16 repeatCount; /* repeat counter */
EAS_U8 state; /* current state EAS_STATE_XXXX */
EAS_U8 style; /* from STYLE */
EAS_U8 index; /* index into buffer */
EAS_U8 octave; /* octave prefix */
EAS_U8 volume; /* current volume */
EAS_U8 note; /* MIDI note number */
EAS_I8 noteModifier; /* sharp or flat */
EAS_I8 buffer[MAX_LINE_SIZE+1]; /* buffer for ASCII data */
} S_IMELODY_DATA;
////////////////////////////////////////////////////////////////////////////
/* increase gain for mono ringtones */
#define IMELODY_GAIN_OFFSET 8
/* length of 32nd note in 1/256ths of a msec for 120 BPM tempo */
#define DEFAULT_TICK_CONV 16000
#define TICK_CONVERT 1920000
/* default channel and program for iMelody playback */
#define IMELODY_CHANNEL 0
#define IMELODY_PROGRAM 80
/*#define IMELODY_VEL_MUL 4
#define IMELODY_VEL_OFS 67*/
#define IMELODY_VEL_MUL 8
#define IMELODY_VEL_OFS 0
/* multiplier for fixed point triplet conversion */
#define TRIPLET_MULTIPLIER 683
#define TRIPLET_SHIFT 10
static const char* const tokens[] =
{
"BEGIN:IMELODY",
"BEGIN:EMELODY",
"VERSION:",
"FORMAT:CLASS",
"NAME:",
"COMPOSER:",
"BEAT:",
"STYLE:",
"VOLUME:",
"MELODY:",
"END:IMELODY",
"END:EMELODY"
};
typedef enum
{
TOKEN_BEGIN,
TOKEN_BEGIN_E,
TOKEN_VERSION,
TOKEN_FORMAT,
TOKEN_NAME,
TOKEN_COMPOSER,
TOKEN_BEAT,
TOKEN_STYLE,
TOKEN_VOLUME,
TOKEN_MELODY,
TOKEN_END,
TOKEN_END_E,
TOKEN_INVALID
} ENUM_IMELODY_TOKENS;
/* ledon or ledoff */
static const char ledStr[] = "edo";
/* vibeon or vibeoff */
static const char vibeStr[] = "ibeo";
/* backon or backoff */
static const char backStr[] = "cko";
/* lookup table for note values */
static const EAS_I8 noteTable[] = { 9, 11, 0, 2, 4, 5, 7 };
/* inline functions */
#ifdef _DEBUG_IMELODY
static void PutBackChar (S_IMELODY_DATA *pData)
{
if (pData->index)
pData->index--;
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "PutBackChar '%c'\n", pData->buffer[pData->index]); */ }
}
#else
void PutBackChar (S_IMELODY_DATA *pData) { if (pData->index) pData->index--; }
#endif
/* local prototypes */
static EAS_RESULT IMY_CheckFileType (MEM_FILE_HANDLE* fileHandle, S_IMELODY_DATA* pData);
static EAS_RESULT IMY_Event (EAS_VOID_PTR pInstData, EAS_INT parserMode);
static EAS_RESULT IMY_State (EAS_VOID_PTR pInstData, EAS_STATE *pState);
static EAS_RESULT IMY_Close (EAS_VOID_PTR pInstData);
static EAS_BOOL IMY_PlayNote (S_IMELODY_DATA *pData, EAS_I8 note, EAS_INT parserMode);
static EAS_BOOL IMY_PlayRest (S_IMELODY_DATA *pData);
static EAS_BOOL IMY_GetDuration (S_IMELODY_DATA *pData, EAS_I32 *pDuration);
static EAS_BOOL IMY_GetLEDState (S_IMELODY_DATA *pData);
static EAS_BOOL IMY_GetVibeState (S_IMELODY_DATA *pData);
static EAS_BOOL IMY_GetBackState (S_IMELODY_DATA *pData);
static EAS_BOOL IMY_GetVolume (S_IMELODY_DATA *pData, EAS_BOOL inHeader);
static EAS_BOOL IMY_GetNumber (S_IMELODY_DATA *pData, EAS_INT *temp, EAS_BOOL inHeader);
static EAS_RESULT IMY_ParseHeader (S_IMELODY_DATA* pData);
static EAS_I8 IMY_GetNextChar (S_IMELODY_DATA *pData, EAS_BOOL inHeader);
static EAS_RESULT IMY_ReadLine (MEM_FILE_HANDLE* fileHandle, EAS_I8 *buffer, int *pStartLine);
static EAS_INT IMY_ParseLine (EAS_I8 *buffer, EAS_U8 *pIndex);
/*----------------------------------------------------------------------------
* IMY_CheckFileType()
*----------------------------------------------------------------------------
* Purpose:
* Check the file type to see if we can parse it
*
* Inputs:
* pEASData - pointer to overall EAS data structure
* handle - pointer to file handle
*
* Outputs:
*
*
* Side Effects:
*
*----------------------------------------------------------------------------
*/
static EAS_RESULT IMY_CheckFileType (MEM_FILE_HANDLE *fileHandle, S_IMELODY_DATA* pData)
{
EAS_I8 buffer[MAX_LINE_SIZE+1];
EAS_U8 index;
EAS_INT t;
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "Enter IMY_CheckFileType\n"); */ }
#endif
/* read the first line of the file */
if (IMY_ReadLine(fileHandle, buffer, NULL) != EAS_SUCCESS)
return EAS_SUCCESS;
/* check for header string */
t = IMY_ParseLine(buffer, &index);
if ((t == TOKEN_BEGIN) || (t == TOKEN_BEGIN_E)) {
memset(pData, 0, sizeof(S_IMELODY_DATA));
/* initialize */
pData->fileHandle = fileHandle;
pData->fileOffset = 0;
pData->state = EAS_STATE_OPEN;
if (t == TOKEN_BEGIN) {
pData->subType = 'I';
} else if (t == TOKEN_BEGIN_E) {
pData->subType = 'E';
}
}
return EAS_SUCCESS;
}
/*----------------------------------------------------------------------------
* IMY_Event()
*----------------------------------------------------------------------------
* Purpose:
* Parse the next event in the file
*
* Inputs:
* pEASData - pointer to overall EAS data structure
* handle - pointer to file handle
*
* Outputs:
*
*
* Side Effects:
*
*----------------------------------------------------------------------------
*/
static EAS_RESULT IMY_Event (EAS_VOID_PTR pInstData, EAS_INT parserMode)
{
S_IMELODY_DATA* pData;
EAS_RESULT result;
EAS_I8 c;
EAS_BOOL eof;
EAS_INT temp;
pData = (S_IMELODY_DATA*) pInstData;
if (pData->state >= EAS_STATE_OPEN)
return EAS_SUCCESS;
/* initialize MIDI channel when the track starts playing */
if (pData->time == 0)
{
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "IMY_Event: Reset\n"); */ }
#endif
/* set program to square lead */
//VMProgramChange(pEASData->pVoiceMgr, pData->pSynth, IMELODY_CHANNEL, IMELODY_PROGRAM);
/* set channel volume to max */
//VMControlChange(pEASData->pVoiceMgr, pData->pSynth, IMELODY_CHANNEL, 7, 127);
}
/* check for end of note */
if (pData->note)
{
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "Stopping note %d\n", pData->note); */ }
#endif
/* stop the note */
Mute();
pData->note = 0;
/* check for rest between notes */
if (pData->restTicks)
{
pData->time += pData->restTicks;
pData->restTicks = 0;
return EAS_SUCCESS;
}
}
/* parse the next event */
eof = EAS_FALSE;
while (!eof)
{
/* get next character */
c = IMY_GetNextChar(pData, EAS_FALSE);
if (Debug) {
printf("Next char is '%c'\n", c);
}
switch (c)
{
/* start repeat */
case '+':
if (pData->subType == 'E') {
if (pData->octaveShift < 2) {
++(pData->octaveShift);
}
}
break;
case '(':
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "Enter repeat section\n", c); */ }
#endif
if (pData->subType == 'E') {
IMY_GetNextChar(pData, EAS_FALSE); /* assume 'b' */
IMY_GetNextChar(pData, EAS_FALSE); /* assume ')' */
pData->noteModifier = 1;
} else {
if (pData->repeatOffset < 0)
{
pData->repeatOffset = pData->startLine + (EAS_I32) pData->index;
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "Repeat offset = %d\n", pData->repeatOffset); */ }
#endif
}
else
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_WARNING, "Ignoring nested repeat section\n"); */ }
}
break;
/* end repeat */
case ')':
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "End repeat section, repeat offset = %d\n", pData->repeatOffset); */ }
#endif
/* ignore invalid repeats */
if (pData->repeatCount >= 0)
{
/* decrement repeat count (repeatCount == 0 means infinite loop) */
if (pData->repeatCount > 0)
{
if (--pData->repeatCount == 0)
{
pData->repeatCount = -1;
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "Repeat loop complete\n"); */ }
#endif
}
}
//2 TEMPORARY FIX: If locating, don't do infinite loops.
//3 We need a different mode for metadata parsing where we don't loop at all
if ((parserMode == eParserModePlay) || (pData->repeatCount != 0))
{
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "Rewinding file for repeat\n"); */ }
#endif
/* rewind to start of loop */
if ((result = EAS_HWFileSeek(pData->fileHandle, pData->repeatOffset)) != EAS_SUCCESS)
return result;
IMY_ReadLine(pData->fileHandle, pData->buffer, &pData->startLine);
pData->index = 0;
/* if last loop, prevent future loops */
if (pData->repeatCount == -1)
pData->repeatOffset = -1;
}
}
break;
/* repeat count */
case '@':
if (!IMY_GetNumber(pData, &temp, EAS_FALSE))
eof = EAS_TRUE;
else if (pData->repeatOffset > 0)
{
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "Repeat count = %dt", pData->repeatCount); */ }
#endif
if (pData->repeatCount < 0)
pData->repeatCount = (EAS_I16) temp;
}
break;
/* volume */
case 'V':
if (!IMY_GetVolume(pData, EAS_FALSE))
eof = EAS_TRUE;
break;
/* flat */
case '&':
pData->noteModifier = -1;
break;
/* sharp */
case '#':
pData->noteModifier = +1;
break;
/* octave */
case '*':
c = IMY_GetNextChar(pData, EAS_FALSE);
if (isdigit(c))
pData->octave = (EAS_U8) ((c - '0' + 1) * 12);
else if (!c)
eof = EAS_TRUE;
break;
/* ledon or ledoff */
case 'l':
if (!IMY_GetLEDState(pData))
eof = EAS_TRUE;
break;
/* vibeon or vibeoff */
case 'v':
if (!IMY_GetVibeState(pData))
eof = EAS_TRUE;
break;
/* either a B note or backon or backoff */
case 'b':
if (IMY_GetNextChar(pData, EAS_FALSE) == 'a')
{
if (!IMY_GetBackState(pData))
eof = EAS_TRUE;
}
else
{
PutBackChar(pData);
if (IMY_PlayNote(pData, c, parserMode))
return EAS_SUCCESS;
eof = EAS_TRUE;
}
break;
/* rest */
case 'r':
case 'R':
if (IMY_PlayRest(pData))
return EAS_SUCCESS;
eof = EAS_TRUE;
break;
/* EMelody pause (rest) */
case 'p':
pData->durationEMY = '3';
if (IMY_PlayRest(pData))
return EAS_SUCCESS;
eof = EAS_TRUE;
break;
case 'P':
pData->durationEMY = '1';
if (IMY_PlayRest(pData))
return EAS_SUCCESS;
eof = EAS_TRUE;
break;
/* EOF */
case 0:
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "IMY_Event: end of iMelody file detected\n"); */ }
#endif
eof = EAS_TRUE;
break;
/* must be a note */
default:
if (pData->subType == 'E') {
if ((c >= 'A') && (c <= 'G')) {
pData->durationEMY = '1';
} else {
pData->durationEMY = '3';
}
}
c = tolower(c);
if ((c >= 'a') && (c <= 'g'))
{
if (IMY_PlayNote(pData, c, parserMode))
return EAS_SUCCESS;
eof = EAS_TRUE;
}
else
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_WARNING, "Ignoring unexpected character '%c' [0x%02x]\n", c, c); */ }
break;
}
}
/* handle EOF */
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "IMY_Event: state set to EAS_STATE_STOPPING\n"); */ }
#endif
pData->state = EAS_STATE_STOPPING;
//VMReleaseAllVoices(pEASData->pVoiceMgr, pData->pSynth);
return EAS_SUCCESS;
}
/*----------------------------------------------------------------------------
* IMY_State()
*----------------------------------------------------------------------------
* Purpose:
* Returns the current state of the stream
*
* Inputs:
* pEASData - pointer to overall EAS data structure
* handle - pointer to file handle
* pState - pointer to variable to store state
*
* Outputs:
*
*
* Side Effects:
*
*----------------------------------------------------------------------------
*/
static EAS_RESULT IMY_State (EAS_VOID_PTR pInstData, EAS_I32 *pState)
{
S_IMELODY_DATA* pData;
/* establish pointer to instance data */
pData = (S_IMELODY_DATA*) pInstData;
/* if stopping, check to see if synth voices are active */
if (pData->state == EAS_STATE_STOPPING)
{
if (1) //(VMActiveVoices(pData->pSynth) == 0)
{
pData->state = EAS_STATE_STOPPED;
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "IMY_State: state set to EAS_STATE_STOPPED\n"); */ }
#endif
}
}
if (pData->state == EAS_STATE_PAUSING)
{
if (1) //(VMActiveVoices(pData->pSynth) == 0)
{
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "IMY_State: state set to EAS_STATE_PAUSED\n"); */ }
#endif
pData->state = EAS_STATE_PAUSED;
}
}
/* return current state */
*pState = pData->state;
return EAS_SUCCESS;
}
/*----------------------------------------------------------------------------
* IMY_Close()
*----------------------------------------------------------------------------
* Purpose:
* Close the file and clean up
*
* Inputs:
* pEASData - pointer to overall EAS data structure
* handle - pointer to file handle
*
* Outputs:
*
*
* Side Effects:
*
*----------------------------------------------------------------------------
*/
static EAS_RESULT IMY_Close (EAS_VOID_PTR pInstData)
{
S_IMELODY_DATA* pData;
EAS_RESULT result;
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "IMY_Close: close file\n"); */ }
#endif
pData = (S_IMELODY_DATA*) pInstData;
/* close the file */
if ((result = EAS_HWCloseFile(pData->fileHandle)) != EAS_SUCCESS)
return result;
return EAS_SUCCESS;
}
/*----------------------------------------------------------------------------
* IMY_PlayNote()
*----------------------------------------------------------------------------
* Purpose:
*
*
* Inputs:
*
*
* Outputs:
*
*
* Side Effects:
*
*----------------------------------------------------------------------------
*/
static EAS_BOOL IMY_PlayNote (S_IMELODY_DATA *pData, EAS_I8 note, EAS_INT parserMode)
{
EAS_I32 duration;
EAS_U8 velocity;
//!!! ïîäóìàòü, êàê ñäåëàòü èãðàëêó èç ïàðàìåòðîâ (-i ñòðîêà -I ôàéë ?)
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "IMY_PlayNote: start note %d\n", note); */ }
#endif
/* get the duration */
if (!IMY_GetDuration(pData, &duration))
return EAS_FALSE;
/* save note value */
if (pData->subType == 'E') {
pData->note = (EAS_U8) (48 + pData->octaveShift * 12 + noteTable[note - 'a'] + pData->noteModifier);
} else {
pData->note = (EAS_U8) (pData->octave + noteTable[note - 'a'] + pData->noteModifier);
}
velocity = (EAS_U8) (pData->volume ? pData->volume * IMELODY_VEL_MUL + IMELODY_VEL_OFS : 0);
if (Debug) {
printf("Playing note %d(%c), velocity %d, duration %d ticks\n", pData->note, note, velocity, duration);
}
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "IMY_PlayNote: Start note %d, duration %d\n", pData->note, duration); */ }
#endif
/* determine note length */
switch (pData->style)
{
case 0:
pData->restTicks = duration >> 4;
break;
case 1:
pData->restTicks = 0;
break;
case 2:
pData->restTicks = duration >> 1;
break;
default:
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_WARNING, "IMY_PlayNote: Note style out of range: %d\n", pData->style); */ }
pData->restTicks = duration >> 4;
break;
}
/* next event is at end of this note */
pData->time += duration - pData->restTicks;
/* reset the flat/sharp modifier */
pData->noteModifier = 0;
/* reset EMelody default octave shift */
pData->octaveShift = 0;
/* start note only if in play mode */
if (parserMode == eParserModePlay)
Play(pData->note, velocity, ((duration - pData->restTicks) * 1000) / 256);
Mute();
if (pData->restTicks != 0) {
this_thread::sleep_for(microseconds((pData->restTicks * 1000)/ 256));
}
return EAS_TRUE;
}
/*----------------------------------------------------------------------------
* IMY_PlayRest()
*----------------------------------------------------------------------------
* Purpose:
*
*
* Inputs:
*
*
* Outputs:
*
*
* Side Effects:
*
*----------------------------------------------------------------------------
*/
static EAS_BOOL IMY_PlayRest (S_IMELODY_DATA *pData)
{
EAS_I32 duration;
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "Enter IMY_PlayRest]n"); */ }
#endif
/* get the duration */
if (!IMY_GetDuration(pData, &duration))
return EAS_FALSE;
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "IMY_PlayRest: note duration %d\n", duration); */ }
#endif
/* next event is at end of this note */
pData->time += duration;
if (Debug) {
printf("Pause for %d ticks\n", duration);
}
this_thread::sleep_for(microseconds((duration * 1000)/ 256));
return EAS_TRUE;
}
/*----------------------------------------------------------------------------
* IMY_GetDuration()
*----------------------------------------------------------------------------
* Purpose:
*
*
* Inputs:
*
*
* Outputs:
*
*
* Side Effects:
*
*----------------------------------------------------------------------------
*/
static EAS_BOOL IMY_GetDuration (S_IMELODY_DATA *pData, EAS_I32 *pDuration)
{
EAS_I32 duration;
EAS_I8 c;
/* get the duration */
*pDuration = 0;
/* EMelody case */
if (pData->subType == 'E') {
duration = pData->tick * (1 << ('5' - pData->durationEMY));
c = IMY_GetNextChar(pData, EAS_FALSE);
if (!c) {
*pDuration = duration;
return EAS_TRUE;
}
if (c == '.') {
duration = duration * 2;
} else {
PutBackChar(pData);
}
*pDuration = duration;
return EAS_TRUE;
}
/* IMelody case */
c = IMY_GetNextChar(pData, EAS_FALSE);
if (!c)
return EAS_FALSE;
if ((c < '0') || (c > '5'))
{
#ifdef _DEBUG_IMELODY
{ /* dpp: EAS_ReportEx(_EAS_SEVERITY_DETAIL, "IMY_GetDuration: error in duration '%c'\n", c); */ }
#endif
return EAS_FALSE;
}
/* calculate total length of note */
duration = pData->tick * (1 << ('5' - c));
/* check for duration modifier */
c = IMY_GetNextChar(pData, EAS_FALSE);
if (c)
{
if (c == '.')
duration += duration >> 1;
else if (c == ':')
duration += (duration >> 1) + (duration >> 2);