adlib.c File Reference
Interface to adlib hardware. More...
#include <stdlib.h>
#include <stdio.h>
#include "adlib.h"
#include "fmopl.h"
#include "../../common/platform.h"
#include "../../common/common_utils.h"
#include "../../memory/memory.h"
#include "../../console/console.h"
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Data Structures | |
| struct | musicGroup_t |
Defines | |
| #define | OPL_INTERNAL_FREQ 3600000 |
| #define | OPL_NUM_CHIPS 1 |
| #define | ADLIB_FREQ 22050 |
| #define | alFMStatus 0x388 |
| #define | alFMAddr 0x388 |
| #define | alFMData 0x389 |
| #define | alChar 0x20 |
| #define | alScale 0x40 |
| #define | alAttack 0x60 |
| #define | alSus 0x80 |
| #define | alWave 0xe0 |
| #define | alFreqL 0xa0 |
| #define | alFreqH 0xb0 |
| #define | alFeedCon 0xc0 |
| #define | alEffects 0xbd |
| #define | ADLIB_MUSIC_SPEED 44100 |
| #define | ADLIB_MUSIC_BYPS (ADLIB_MUSIC_SPEED*2) |
Functions | |
| PUBLIC wtBoolean | ADLIB_Init (W32 freq) |
| Start adlib hardware. | |
| PUBLIC void | ADLIB_Shutdown (void) |
| Shutdown adlib hardware. | |
| PRIVATE void | ADLIB_SetFXInst (Instrument *inst) |
| Set Adlib FX instruction. | |
| PUBLIC void * | ADLIB_DecodeSound (AdLibSound *sound, W32 *length) |
| Decode adlib sound. | |
| PUBLIC void | ADLIB_LoadMusic (void *musbuffer) |
| Setup music decoder. | |
| PUBLIC W32 | ADLIB_UpdateMusic (W32 size, void *buffer) |
| Decode adlib music sound. | |
| PUBLIC W32 | ADLIB_getLength (void *musbuffer) |
| Get music length in milliseconds. | |
Variables | |
| PRIVATE W8 | carriers [9] = { 3, 4, 5, 11, 12,13, 19, 20, 21 } |
| PRIVATE W8 | modifiers [9] = { 0, 1, 2, 8, 9, 10, 16, 17, 18 } |
| PRIVATE FM_OPL * | hAdLib = NULL |
| PRIVATE W16 * | sqHackPtr |
| PRIVATE W32 | sqHackLen |
| PRIVATE W32 | sqHackTime |
| PRIVATE W32 | alTimeCount |
| musicGroup_t * | music |
Detailed Description
Interface to adlib hardware.
- Date:
- 2004-2005
- Note:
- Portion of this code was derived from Wolfenstein 3-D, and was originally written by Id Software, Inc.
Function Documentation
| PUBLIC void* ADLIB_DecodeSound | ( | AdLibSound * | sound, | |
| W32 * | length | |||
| ) |
Decode adlib sound.
- Parameters:
-
[in] inst Valid pointer to Instrument structure. [out] length Length of decoded sound data in bytes.
- Returns:
- On success true, otherwise false.
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| PUBLIC W32 ADLIB_getLength | ( | void * | musbuffer | ) |
Get music length in milliseconds.
- Parameters:
-
[in] musbuffer musicGroup_t data structure. [in,out] buffer Hold decoded sound data.
- Returns:
- On success length in milliseconds.
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| PUBLIC wtBoolean ADLIB_Init | ( | W32 | freq | ) |
Start adlib hardware.
- Returns:
- 1 on success, otherwise 0.
- Note:
- Must call ADLIB_Shutdown() when done.
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| PUBLIC void ADLIB_LoadMusic | ( | void * | musbuffer | ) |
Setup music decoder.
- Parameters:
-
[in] musbuffer musicGroup_t data structure.
- Returns:
- Nothing.
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| PRIVATE void ADLIB_SetFXInst | ( | Instrument * | inst | ) |
Set Adlib FX instruction.
- Parameters:
-
[in] inst Valid pointer to Instrument structure.
- Returns:
- Nothing.
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| PUBLIC W32 ADLIB_UpdateMusic | ( | W32 | size, | |
| void * | buffer | |||
| ) |
Decode adlib music sound.
- Parameters:
-
[in] size Number of bytes to write to buffer. [in,out] buffer Hold decoded sound data.
- Returns:
- 1 on success, otherwise 0.
- Note:
- Data written to buffer is 44100/16/mono
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