From e442bb7cd6a085b33a4dd52c0e20a157ada7feb1 Mon Sep 17 00:00:00 2001 From: The Android Open Source Project Date: Tue, 21 Oct 2008 07:00:00 -0700 Subject: Initial Contribution --- arm-wt-22k/lib_src/eas_rtttl.c | 1197 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1197 insertions(+) create mode 100644 arm-wt-22k/lib_src/eas_rtttl.c (limited to 'arm-wt-22k/lib_src/eas_rtttl.c') diff --git a/arm-wt-22k/lib_src/eas_rtttl.c b/arm-wt-22k/lib_src/eas_rtttl.c new file mode 100644 index 0000000..486ad60 --- /dev/null +++ b/arm-wt-22k/lib_src/eas_rtttl.c @@ -0,0 +1,1197 @@ +/*---------------------------------------------------------------------------- + * + * File: + * eas_rtttl.c + * + * Contents and purpose: + * RTTTL 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: 795 $ + * $Date: 2007-08-01 00:14:45 -0700 (Wed, 01 Aug 2007) $ + *---------------------------------------------------------------------------- +*/ + +#include "eas_data.h" +#include "eas_miditypes.h" +#include "eas_parser.h" +#include "eas_report.h" +#include "eas_host.h" +#include "eas_midi.h" +#include "eas_config.h" +#include "eas_vm_protos.h" +#include "eas_rtttldata.h" +#include "eas_ctype.h" + +/* increase gain for mono ringtones */ +#define RTTTL_GAIN_OFFSET 8 + +/* maximum title length including colon separator */ +#define RTTTL_MAX_TITLE_LEN 32 +#define RTTTL_INFINITE_LOOP 15 + +/* length of 32nd note in 1/256ths of a msec for 63 BPM tempo */ +#define DEFAULT_TICK_CONV 30476 +#define TICK_CONVERT 1920000 + +/* default channel and program for RTTTL playback */ +#define RTTTL_CHANNEL 0 +#define RTTTL_PROGRAM 80 +#define RTTTL_VELOCITY 127 + +/* note used for rest */ +#define RTTTL_REST 1 + +/* multiplier for fixed point triplet conversion */ +#define TRIPLET_MULTIPLIER 683 +#define TRIPLET_SHIFT 10 + +/* local prototypes */ +static EAS_RESULT RTTTL_CheckFileType (S_EAS_DATA *pEASData, EAS_FILE_HANDLE fileHandle, EAS_VOID_PTR *ppHandle, EAS_I32 offset); +static EAS_RESULT RTTTL_Prepare (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData); +static EAS_RESULT RTTTL_Time (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData, EAS_U32 *pTime); +static EAS_RESULT RTTTL_Event (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData, EAS_INT parserMode); +static EAS_RESULT RTTTL_State (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData, EAS_STATE *pState); +static EAS_RESULT RTTTL_Close (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData); +static EAS_RESULT RTTTL_Reset (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData); +static EAS_RESULT RTTTL_Pause (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData); +static EAS_RESULT RTTTL_Resume (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData); +static EAS_RESULT RTTTL_SetData (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData, EAS_I32 param, EAS_I32 value); +static EAS_RESULT RTTTL_GetData (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData, EAS_I32 param, EAS_I32 *pValue); +static EAS_RESULT RTTTL_GetStyle (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData); +static EAS_RESULT RTTTL_GetDuration (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData, EAS_I8 *pDuration); +static EAS_RESULT RTTTL_GetOctave (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData, EAS_U8 *pOctave); +static EAS_RESULT RTTTL_GetTempo (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData); +static EAS_RESULT RTTTL_GetNumber (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData, EAS_I32 *pValue); +static EAS_RESULT RTTTL_ParseHeader (S_EAS_DATA *pEASData, S_RTTTL_DATA* pData, EAS_BOOL metaData); +static EAS_RESULT RTTTL_GetNextChar (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData, EAS_I8 *pValue); +static EAS_RESULT RTTTL_PeekNextChar (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData, EAS_I8 *pValue); + +/* inline functions */ +EAS_INLINE void RTTTL_PutBackChar (S_RTTTL_DATA *pData, EAS_I8 value) { pData->dataByte = value; } + + +/* lookup table for note values */ +static const EAS_U8 noteTable[] = { 21, 23, 12, 14, 16, 17, 19, 23 }; + +/*---------------------------------------------------------------------------- + * + * EAS_RTTTL_Parser + * + * This structure contains the functional interface for the iMelody parser + *---------------------------------------------------------------------------- +*/ +const S_FILE_PARSER_INTERFACE EAS_RTTTL_Parser = +{ + RTTTL_CheckFileType, + RTTTL_Prepare, + RTTTL_Time, + RTTTL_Event, + RTTTL_State, + RTTTL_Close, + RTTTL_Reset, + RTTTL_Pause, + RTTTL_Resume, + NULL, + RTTTL_SetData, + RTTTL_GetData, + NULL +}; + +/*---------------------------------------------------------------------------- + * RTTTL_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 RTTTL_CheckFileType (S_EAS_DATA *pEASData, EAS_FILE_HANDLE fileHandle, EAS_VOID_PTR *ppHandle, EAS_I32 offset) +{ + S_RTTTL_DATA data; + S_RTTTL_DATA *pData; + + /* see if we can parse the header */ + data.fileHandle = fileHandle; + data.fileOffset = offset; + *ppHandle= NULL; + if (RTTTL_ParseHeader (pEASData, &data, EAS_FALSE) == EAS_SUCCESS) + { + + /* check for static memory allocation */ + if (pEASData->staticMemoryModel) + pData = EAS_CMEnumData(EAS_CM_RTTTL_DATA); + else + pData = EAS_HWMalloc(pEASData->hwInstData, sizeof(S_RTTTL_DATA)); + if (!pData) + return EAS_ERROR_MALLOC_FAILED; + EAS_HWMemSet(pData, 0, sizeof(S_RTTTL_DATA)); + + /* return a pointer to the instance data */ + pData->fileHandle = fileHandle; + pData->fileOffset = offset; + pData->state = EAS_STATE_OPEN; + *ppHandle = pData; + } + + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_Prepare() + *---------------------------------------------------------------------------- + * Purpose: + * Prepare to parse the file. Allocates instance data (or uses static allocation for + * static memory model). + * + * Inputs: + * pEASData - pointer to overall EAS data structure + * handle - pointer to file handle + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +static EAS_RESULT RTTTL_Prepare (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData) +{ + S_RTTTL_DATA* pData; + EAS_RESULT result; + + /* check for valid state */ + pData = (S_RTTTL_DATA*) pInstData; + if (pData->state != EAS_STATE_OPEN) + return EAS_ERROR_NOT_VALID_IN_THIS_STATE; + + /* instantiate a synthesizer */ + if ((result = VMInitMIDI(pEASData, &pData->pSynth)) != EAS_SUCCESS) + { + { /* dpp: EAS_ReportEx(_EAS_SEVERITY_ERROR, "VMInitMIDI returned %d\n", result); */ } + return result; + } + + pData->state = EAS_STATE_ERROR; + if ((result = RTTTL_ParseHeader (pEASData, pData, (EAS_BOOL) (pData->metadata.callback != NULL))) != EAS_SUCCESS) + { + /* if using dynamic memory, free it */ + if (!pEASData->staticMemoryModel) + EAS_HWFree(pEASData->hwInstData, pData); + return result; + } + + pData->state = EAS_STATE_READY; + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_Time() + *---------------------------------------------------------------------------- + * Purpose: + * Returns the time of the next event in msecs + * + * Inputs: + * pEASData - pointer to overall EAS data structure + * handle - pointer to file handle + * pTime - pointer to variable to hold time of next event (in msecs) + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +/*lint -esym(715, pEASData) reserved for future use */ +static EAS_RESULT RTTTL_Time (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData, EAS_U32 *pTime) +{ + S_RTTTL_DATA *pData; + + pData = (S_RTTTL_DATA*) pInstData; + + /* return time in milliseconds */ + /*lint -e{704} use shift instead of division */ + *pTime = pData->time >> 8; + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_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 RTTTL_Event (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData, EAS_INT parserMode) +{ + S_RTTTL_DATA* pData; + EAS_RESULT result; + EAS_I32 ticks; + EAS_I32 temp; + EAS_I8 c; + EAS_U8 note; + EAS_U8 octave; + + pData = (S_RTTTL_DATA*) pInstData; + if (pData->state >= EAS_STATE_OPEN) + return EAS_SUCCESS; + + /* initialize MIDI channel when the track starts playing */ + if (pData->time == 0) + { + /* set program to square lead */ + VMProgramChange(pEASData->pVoiceMgr, pData->pSynth, RTTTL_CHANNEL, RTTTL_PROGRAM); + + /* set channel volume to max */ + VMControlChange(pEASData->pVoiceMgr, pData->pSynth, RTTTL_CHANNEL, 7, 127); + } + + /* check for end of note */ + if (pData->note) + { + /* stop the note */ + VMStopNote(pEASData->pVoiceMgr, pData->pSynth, RTTTL_CHANNEL, pData->note, 0); + 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 */ + octave = pData->octave; + note = 0; + ticks = pData->duration * pData->tick; + for (;;) + { + + /* get next character */ + if ((result = RTTTL_GetNextChar(pEASData->hwInstData, pData, &c)) != EAS_SUCCESS) + { + if (result != EAS_EOF) + return result; + + /* end of file, if no notes to process, check for looping */ + if (!note) + { + /* if no loop set state to stopping */ + if (pData->repeatCount == 0) + { + pData->state = EAS_STATE_STOPPING; + VMReleaseAllVoices(pEASData->pVoiceMgr, pData->pSynth); + return EAS_SUCCESS; + } + + /* decrement loop count */ + if (pData->repeatCount != RTTTL_INFINITE_LOOP) + pData->repeatCount--; + + /* if locating, ignore infinite loops */ + else if (parserMode != eParserModePlay) + { + pData->state = EAS_STATE_STOPPING; + VMReleaseAllVoices(pEASData->pVoiceMgr, pData->pSynth); + return EAS_SUCCESS; + } + + /* loop back to start of notes */ + if ((result = EAS_HWFileSeek(pEASData->hwInstData, pData->fileHandle, pData->repeatOffset)) != EAS_SUCCESS) + return result; + continue; + } + + /* still have a note to process */ + else + c = ','; + } + + /* bpm */ + if (c == 'b') + { + /* peek at next character */ + if ((result = RTTTL_PeekNextChar(pEASData->hwInstData, pData, &c)) != EAS_SUCCESS) + return result; + + /* if a number, must be octave or tempo */ + if (IsDigit(c)) + { + if ((result = RTTTL_GetNumber(pEASData->hwInstData, pData, &temp)) != EAS_SUCCESS) + return result; + + /* check for octave first */ + if ((temp >= 4) && (temp <= 7)) + { + octave = (EAS_U8) temp; + } + + /* check for tempo */ + else if ((temp >= 25) && (temp <= 900)) + { + pData->tick = TICK_CONVERT / (EAS_U32) temp; + } + + /* don't know what it was */ + else + return EAS_ERROR_FILE_FORMAT; + } + + /* must be a note */ + else + { + note = noteTable[1]; + } + } + + /* octave */ + else if (c == 'o') + { + if ((result = RTTTL_GetOctave(pEASData->hwInstData, pData, &pData->octave)) != EAS_SUCCESS) + return result; + } + + /* style */ + else if (c == 's') + { + if ((result = RTTTL_GetStyle(pEASData->hwInstData, pData)) != EAS_SUCCESS) + return result; + } + + /* duration or octave */ + else if (IsDigit(c)) + { + RTTTL_PutBackChar(pData, c); + + /* duration comes before note */ + if (!note) + { + if ((result = RTTTL_GetDuration(pEASData->hwInstData, pData, &c)) != EAS_SUCCESS) + return result; + ticks = c * pData->tick; + } + + /* octave comes after note */ + else + { + if ((result = RTTTL_GetOctave(pEASData->hwInstData, pData, &octave)) != EAS_SUCCESS) + return result; + } + } + + /* note or rest */ + else if ((c >= 'a') && (c <= 'h')) + { + note = noteTable[c - 'a']; + } + + else if (c == 'p') + { + note = RTTTL_REST; + } + + /* dotted note */ + else if (c == '.') + { + /*lint -e{704} shift for performance */ + ticks += ticks >> 1; + } + + /* accidental */ + else if (c == '#') + { + if (note) + note++; + } + + /* end of event */ + else if ((c == ',') && note) + { + + /* handle note events */ + if (note != RTTTL_REST) + { + + /* save note and start it */ + pData->note = note + octave; + if (parserMode == eParserModePlay) + VMStartNote(pEASData->pVoiceMgr, pData->pSynth, RTTTL_CHANNEL, pData->note, RTTTL_VELOCITY); + + /* determine note length */ + switch (pData->style) + { + /* natural */ + case 'n': + /*lint -e{704} shift for performance */ + pData->restTicks = ticks >> 4; + break; + /* continuous */ + + case 'c': + pData->restTicks = 0; + break; + + /* staccato */ + case 's': + /*lint -e{704} shift for performance */ + pData->restTicks = ticks >> 1; + break; + + default: + { /* dpp: EAS_ReportEx(_EAS_SEVERITY_WARNING, "RTTTL_Event: Unexpected style type %c\n", pData->style); */ } + break; + } + + /* next event is at end of this note */ + pData->time += ticks - pData->restTicks; + } + + /* rest */ + else + pData->time += ticks; + + /* event found, return to caller */ + break; + } + } + + pData->state = EAS_STATE_PLAY; + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_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: + * + *---------------------------------------------------------------------------- +*/ +/*lint -esym(715, pEASData) reserved for future use */ +static EAS_RESULT RTTTL_State (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData, EAS_I32 *pState) +{ + S_RTTTL_DATA* pData; + + /* establish pointer to instance data */ + pData = (S_RTTTL_DATA*) pInstData; + + /* if stopping, check to see if synth voices are active */ + if (pData->state == EAS_STATE_STOPPING) + { + if (VMActiveVoices(pData->pSynth) == 0) + pData->state = EAS_STATE_STOPPED; + } + + if (pData->state == EAS_STATE_PAUSING) + { + if (VMActiveVoices(pData->pSynth) == 0) + pData->state = EAS_STATE_PAUSED; + } + + /* return current state */ + *pState = pData->state; + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_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 RTTTL_Close (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData) +{ + S_RTTTL_DATA* pData; + EAS_RESULT result; + + pData = (S_RTTTL_DATA*) pInstData; + + /* close the file */ + if ((result = EAS_HWCloseFile(pEASData->hwInstData, pData->fileHandle)) != EAS_SUCCESS) + return result; + + /* free the synth */ + if (pData->pSynth != NULL) + VMMIDIShutdown(pEASData, pData->pSynth); + + /* if using dynamic memory, free it */ + if (!pEASData->staticMemoryModel) + EAS_HWFree(pEASData->hwInstData, pData); + + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_Reset() + *---------------------------------------------------------------------------- + * Purpose: + * Reset the sequencer. Used for locating backwards in the file. + * + * Inputs: + * pEASData - pointer to overall EAS data structure + * handle - pointer to file handle + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +static EAS_RESULT RTTTL_Reset (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData) +{ + S_RTTTL_DATA* pData; + EAS_RESULT result; + + pData = (S_RTTTL_DATA*) pInstData; + + /* reset the synth */ + VMReset(pEASData->pVoiceMgr, pData->pSynth, EAS_TRUE); + + /* reset time to zero */ + pData->time = 0; + pData->note = 0; + + /* reset file position and re-parse header */ + pData->state = EAS_STATE_ERROR; + if ((result = EAS_HWFileSeek(pEASData->hwInstData, pData->fileHandle, pData->fileOffset)) != EAS_SUCCESS) + return result; + if ((result = RTTTL_ParseHeader (pEASData, pData, EAS_TRUE)) != EAS_SUCCESS) + return result; + + pData->state = EAS_STATE_READY; + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_Pause() + *---------------------------------------------------------------------------- + * Purpose: + * Pauses the sequencer. Mutes all voices and sets state to pause. + * + * Inputs: + * pEASData - pointer to overall EAS data structure + * handle - pointer to file handle + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +static EAS_RESULT RTTTL_Pause (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData) +{ + S_RTTTL_DATA *pData; + + /* can't pause a stopped stream */ + pData = (S_RTTTL_DATA*) pInstData; + if (pData->state == EAS_STATE_STOPPED) + return EAS_ERROR_ALREADY_STOPPED; + + /* mute the synthesizer */ + VMMuteAllVoices(pEASData->pVoiceMgr, pData->pSynth); + pData->state = EAS_STATE_PAUSING; + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_Resume() + *---------------------------------------------------------------------------- + * Purpose: + * Resume playing after a pause, sets state back to playing. + * + * Inputs: + * pEASData - pointer to overall EAS data structure + * handle - pointer to file handle + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +/*lint -esym(715, pEASData) reserved for future use */ +static EAS_RESULT RTTTL_Resume (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData) +{ + S_RTTTL_DATA *pData; + + /* can't resume a stopped stream */ + pData = (S_RTTTL_DATA*) pInstData; + if (pData->state == EAS_STATE_STOPPED) + return EAS_ERROR_ALREADY_STOPPED; + + /* nothing to do but resume playback */ + pData->state = EAS_STATE_PLAY; + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_SetData() + *---------------------------------------------------------------------------- + * Purpose: + * Return file type + * + * Inputs: + * pEASData - pointer to overall EAS data structure + * handle - pointer to file handle + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +/*lint -esym(715, pEASData) reserved for future use */ +static EAS_RESULT RTTTL_SetData (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData, EAS_I32 param, EAS_I32 value) +{ + S_RTTTL_DATA *pData; + + pData = (S_RTTTL_DATA *) pInstData; + switch (param) + { + + /* set metadata callback */ + case PARSER_DATA_METADATA_CB: + EAS_HWMemCpy(&pData->metadata, (void*) value, sizeof(S_METADATA_CB)); + break; + + default: + return EAS_ERROR_INVALID_PARAMETER; + } + + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_GetData() + *---------------------------------------------------------------------------- + * Purpose: + * Return file type + * + * Inputs: + * pEASData - pointer to overall EAS data structure + * handle - pointer to file handle + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +/*lint -esym(715, pEASData) reserved for future use */ +static EAS_RESULT RTTTL_GetData (S_EAS_DATA *pEASData, EAS_VOID_PTR pInstData, EAS_I32 param, EAS_I32 *pValue) +{ + S_RTTTL_DATA *pData; + + pData = (S_RTTTL_DATA *) pInstData; + switch (param) + { + /* return file type as RTTTL */ + case PARSER_DATA_FILE_TYPE: + *pValue = EAS_FILE_RTTTL; + break; + +#if 0 + /* set transposition */ + case PARSER_DATA_TRANSPOSITION: + *pValue = pData->transposition; + break; +#endif + + case PARSER_DATA_SYNTH_HANDLE: + *pValue = (EAS_I32) pData->pSynth; + break; + + case PARSER_DATA_GAIN_OFFSET: + *pValue = RTTTL_GAIN_OFFSET; + break; + + default: + return EAS_ERROR_INVALID_PARAMETER; + } + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_GetStyle() + *---------------------------------------------------------------------------- + * Purpose: + * + * + * Inputs: + * + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +static EAS_RESULT RTTTL_GetStyle (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData) +{ + EAS_RESULT result; + EAS_I8 style; + + /* get style */ + if ((result = RTTTL_GetNextChar(hwInstData, pData, &style)) != EAS_SUCCESS) + return result; + + if ((style != 's') && (style != 'n') && (style != 'c')) + return EAS_ERROR_FILE_FORMAT; + + pData->style = style; + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_GetDuration() + *---------------------------------------------------------------------------- + * Purpose: + * + * + * Inputs: + * + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +static EAS_RESULT RTTTL_GetDuration (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData, EAS_I8 *pDuration) +{ + EAS_RESULT result; + EAS_I32 duration; + EAS_I8 temp; + + /* get the duration */ + if ((result = RTTTL_GetNumber(hwInstData, pData, &duration)) != EAS_SUCCESS) + return result; + + if ((duration != 1) && (duration != 2) && (duration != 4) && (duration != 8) && (duration != 16) && (duration != 32)) + return EAS_ERROR_FILE_FORMAT; + + temp = 64; + while (duration) + { + /*lint -e{704} shift for performance */ + duration = duration >> 1; + /*lint -e{702} use shift for performance */ + temp = temp >> 1; + } + + *pDuration = temp; + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_GetOctave() + *---------------------------------------------------------------------------- + * Purpose: + * + * + * Inputs: + * + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +static EAS_RESULT RTTTL_GetOctave (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData, EAS_U8 *pOctave) +{ + EAS_RESULT result; + EAS_I32 octave; + + /* get the tempo */ + if ((result = RTTTL_GetNumber(hwInstData, pData, &octave)) != EAS_SUCCESS) + return result; + + if ((octave < 4) || (octave > 7)) + return EAS_ERROR_FILE_FORMAT; + + *pOctave = (EAS_U8) (octave * 12); + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_GetTempo() + *---------------------------------------------------------------------------- + * Purpose: + * + * + * Inputs: + * + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +static EAS_RESULT RTTTL_GetTempo (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData) +{ + EAS_RESULT result; + EAS_I32 tempo; + + /* get the tempo */ + if ((result = RTTTL_GetNumber(hwInstData, pData, &tempo)) != EAS_SUCCESS) + return result; + + if ((tempo < 25) || (tempo > 900)) + return EAS_ERROR_FILE_FORMAT; + + pData->tick = TICK_CONVERT / (EAS_U32) tempo; + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_GetNumber() + *---------------------------------------------------------------------------- + * Purpose: + * + * + * Inputs: + * + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +static EAS_RESULT RTTTL_GetNumber (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData, EAS_I32 *pValue) +{ + EAS_RESULT result; + EAS_INT temp; + EAS_I8 c; + + *pValue = -1; + temp = 0; + for (;;) + { + if ((result = RTTTL_PeekNextChar(hwInstData, pData, &c)) != EAS_SUCCESS) + { + if ((result == EAS_EOF) && (*pValue != -1)) + return EAS_SUCCESS; + return result; + } + + if (IsDigit(c)) + { + pData->dataByte = 0; + temp = temp * 10 + c - '0'; + *pValue = temp; + } + else + return EAS_SUCCESS; + } +} + +/*---------------------------------------------------------------------------- + * RTTTL_ParseHeader() + *---------------------------------------------------------------------------- + * Purpose: + * Prepare to parse the file. Allocates instance data (or uses static allocation for + * static memory model). + * + * Inputs: + * pEASData - pointer to overall EAS data structure + * handle - pointer to file handle + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +static EAS_RESULT RTTTL_ParseHeader (S_EAS_DATA *pEASData, S_RTTTL_DATA* pData, EAS_BOOL metaData) +{ + EAS_RESULT result; + EAS_I32 i; + EAS_I8 temp; + EAS_I8 control; + + /* initialize some defaults */ + pData->time = 0; + pData->tick = DEFAULT_TICK_CONV; + pData->note = 0; + pData->duration = 4; + pData ->restTicks = 0; + pData->octave = 60; + pData->repeatOffset = -1; + pData->repeatCount = 0; + pData->style = 'n'; + pData->dataByte = 0; + + metaData = metaData && (pData->metadata.buffer != NULL) && (pData->metadata.callback != NULL); + + /* seek to start of data */ + if ((result = EAS_HWFileSeek(pEASData->hwInstData, pData->fileHandle, pData->fileOffset)) != EAS_SUCCESS) + return result; + + /* zero the metadata buffer */ + if (metaData) + EAS_HWMemSet(pData->metadata.buffer, 0, pData->metadata.bufferSize); + + /* read the title */ + for (i = 0; i < RTTTL_MAX_TITLE_LEN; i++) + { + if ((result = EAS_HWGetByte(pEASData->hwInstData, pData->fileHandle, &temp)) != EAS_SUCCESS) + return result; + + if (temp == ':') + break; + + /* pass along metadata */ + if (metaData) + { + if (i < (pData->metadata.bufferSize- 1)) + pData->metadata.buffer[i] = (char) temp; + } + } + + /* check for error in title */ + if (i == RTTTL_MAX_TITLE_LEN) + return EAS_ERROR_FILE_FORMAT; + + /* pass along metadata */ + if (metaData) + (*pData->metadata.callback)(EAS_METADATA_TITLE, pData->metadata.buffer, pData->metadata.pUserData); + + /* control fields */ + for (;;) + { + + /* get control type */ + if ((result = RTTTL_GetNextChar(pEASData->hwInstData, pData, &control)) != EAS_SUCCESS) + return result; + + /* next char should be equal sign */ + if ((result = RTTTL_GetNextChar(pEASData->hwInstData, pData, &temp)) != EAS_SUCCESS) + return result; + if (temp != '=') + return EAS_ERROR_FILE_FORMAT; + + /* get the control value */ + switch (control) + { + + /* bpm */ + case 'b': + if ((result = RTTTL_GetTempo(pEASData->hwInstData, pData)) != EAS_SUCCESS) + return result; + break; + + /* duration */ + case 'd': + if ((result = RTTTL_GetDuration(pEASData->hwInstData, pData, &temp)) != EAS_SUCCESS) + return result; + pData->duration = temp; + break; + + /* loop */ + case 'l': + if ((result = RTTTL_GetNumber(pEASData->hwInstData, pData, &i)) != EAS_SUCCESS) + return result; + if ((i < 0) || (i > 15)) + return EAS_ERROR_FILE_FORMAT; + pData->repeatCount = (EAS_U8) i; + break; + + /* octave */ + case 'o': + if ((result = RTTTL_GetOctave(pEASData->hwInstData, pData, &pData->octave)) != EAS_SUCCESS) + return result; + break; + + /* get style */ + case 's': + if ((result = RTTTL_GetStyle(pEASData->hwInstData, pData)) != EAS_SUCCESS) + return result; + break; + + /* unrecognized control */ + default: + return EAS_ERROR_FILE_FORMAT; + } + + /* next character should be comma or colon */ + if ((result = RTTTL_GetNextChar(pEASData->hwInstData, pData, &temp)) != EAS_SUCCESS) + return result; + + /* check for end of control field */ + if (temp == ':') + break; + + /* must be a comma */ + if (temp != ',') + return EAS_ERROR_FILE_FORMAT; + } + + /* should be at the start of the music block */ + if ((result = EAS_HWFilePos(pEASData->hwInstData, pData->fileHandle, &pData->repeatOffset)) != EAS_SUCCESS) + return result; + + return EAS_SUCCESS; +} + +/*---------------------------------------------------------------------------- + * RTTTL_GetNextChar() + *---------------------------------------------------------------------------- + * Purpose: + * + * + * Inputs: + * + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +static EAS_RESULT RTTTL_GetNextChar (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData, EAS_I8 *pValue) +{ + EAS_RESULT result; + EAS_I8 temp; + + *pValue = 0; + for(;;) + { + + /* check for character that has been put back */ + if (pData->dataByte) + { + temp = pData->dataByte; + pData->dataByte = 0; + } + else + { + if ((result = EAS_HWGetByte(hwInstData, pData->fileHandle, &temp)) != EAS_SUCCESS) + return result; + } + + /* ignore white space */ + if (!IsSpace(temp)) + { + *pValue = ToLower(temp); + return EAS_SUCCESS; + } + } +} + +/*---------------------------------------------------------------------------- + * RTTTL_PeekNextChar() + *---------------------------------------------------------------------------- + * Purpose: + * + * + * Inputs: + * + * + * Outputs: + * + * + * Side Effects: + * + *---------------------------------------------------------------------------- +*/ +static EAS_RESULT RTTTL_PeekNextChar (EAS_HW_DATA_HANDLE hwInstData, S_RTTTL_DATA *pData, EAS_I8 *pValue) +{ + EAS_RESULT result; + EAS_I8 temp; + + *pValue = 0; + for(;;) + { + + /* read a character from the file, if necessary */ + if (!pData->dataByte) + { + if ((result = EAS_HWGetByte(hwInstData, pData->fileHandle, &pData->dataByte)) != EAS_SUCCESS) + return result; + + } + temp = pData->dataByte; + + /* ignore white space */ + if (!IsSpace(temp)) + { + *pValue = ToLower(temp); + return EAS_SUCCESS; + } + pData->dataByte = 0; + } +} + -- cgit v1.2.3