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New interpolating mixer routines

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1908
This commit is contained in:
Sjoerd van der Berg 2004-08-23 08:04:25 +00:00
parent 1e54741e61
commit 27a331e73d
1 changed files with 42 additions and 11 deletions
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53
include/mixer.h
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@ -17,23 +17,54 @@
*/
typedef void (*MIXER_MixHandler)(Bit8u * sampdate,Bit32u len);
typedef void (*MIXER_Handler)(Bitu len);
#define MIXER_8MONO 0
#define MIXER_8STEREO 1
#define MIXER_16MONO 2
#define MIXER_16STEREO 3
enum BlahModes {
MIXER_8MONO,MIXER_8STEREO,
MIXER_16MONO,MIXER_16STEREO
};
enum MixerModes {
M_8M,M_8S,
M_16M,M_16S,
};
#define MIXER_BUFSIZE (16*1024)
#define MIXER_BUFMASK (MIXER_BUFSIZE-1)
extern Bit8u MixTemp[MIXER_BUFSIZE];
#define MAX_AUDIO ((1<<(16-1))-1)
#define MIN_AUDIO -(1<<(16-1))
struct MIXER_Channel;
class MixerChannel {
public:
void SetVolume(float _left,float _right);
void UpdateVolume(void);
void SetFreq(Bitu _freq);
void Mix(Bitu _needed);
void AddSilence(void); //Fill up until needed
template<bool _8bit,bool stereo>
void AddSamples(Bitu len,void * data);
void AddSamples_m8(Bitu len,Bit8u * data);
void AddSamples_s8(Bitu len,Bit8u * data);
void AddSamples_m16(Bitu len,Bit16s * data);
void AddSamples_s16(Bitu len,Bit16s * data);
void AddStretched(Bitu len,Bit16s * data); //Strech block up into needed data
void FillUp(void);
void Enable(bool _yesno);
MIXER_Handler handler;
float volmain[2];
Bit32s volmul[2];
Bitu freq_add,freq_index;
Bitu done,needed;
Bits last[2];
char * name;
bool enabled;
MixerChannel * next;
};
MIXER_Channel * MIXER_AddChannel(MIXER_MixHandler handler,Bitu freq,char * name);
MIXER_Channel * MIXER_FindChannel(const char * name);
void MIXER_SetVolume(MIXER_Channel * chan,float left,float right);
void MIXER_SetFreq(MIXER_Channel * chan,Bitu freq);
void MIXER_SetMode(MIXER_Channel * chan,Bit8u mode);
void MIXER_Enable(MIXER_Channel * chan,bool enable);
MixerChannel * MIXER_AddChannel(MIXER_Handler handler,Bitu freq,char * name);
MixerChannel * MIXER_FindChannel(const char * name);
/* PC Speakers functions, tightly related to the timer functions */