winamp/Src/libvp6/corelibs/sal/generic/circlebuffer.h

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2024-09-24 12:54:57 +00:00
#if !defined(_circlebuffer_h)
#define _circlebuffer_h
#include <stdlib.h>
#if defined(__cplusplus)
extern "C" {
#endif
#if defined(_WIN32)
typedef __int64 int64_t;
#elif defined(__POWERPC) || defined(__APPLE)
#include <ppc/types.h>
#else
typedef long long int64_t;
#endif
#if !defined(_WIN32)
#pragma bool on
#endif
typedef unsigned char CircleRecord_t;
typedef void (*FuncLock_t)() ;
/* assume that assert, alerts, messages to go off before this ever is allowed to fill */
/*------------------------------------------------------------------------------------*/
typedef struct CircleBuf_tt
{
size_t head; /* points to start of usable data in buffer */
size_t count;
size_t bufSize;
int64_t bytesConsumed;
size_t recordSize;
size_t userData; /* might store actual recordsize */
int balance;
CircleRecord_t* buffer; /* 10 seconds of 16 bit stereo nice quality */
unsigned char* maxChunk;
size_t maxChunkLen;
int percent; /* level where buffer considered stable */
int wrapped; /* non-zero if data has wrapped at least once */
int muted;
FuncLock_t lock; /* in case there could be competition for any members */
FuncLock_t unlock; /* in case there could be competition for any members */
int starvedBytes; /* how many bytes we had to "conjure up" because we were empty (debug) */
int starvedRequests; /* how many request we honored when we have been in a starved state (debug) */
} CircleBuffer_t;
void testCircleBuffer(void);
void destroyCircleBuffer(CircleBuffer_t* cb);
int initCircleBuffer(CircleBuffer_t* cb, size_t size, int percent, size_t maxChunk, FuncLock_t lock, FuncLock_t unlock);
int addToCircleBuffer(CircleBuffer_t* cb, void* data, size_t count);
int readFromCircleBuffer(CircleBuffer_t* cb, void* dest, size_t count);
int accessCircleBuffer(CircleBuffer_t* cb, void* dest, size_t count);
void FreeWrapless(const CircleBuffer_t* cb, void* handle, size_t* sizeWrapless);
int resetCircleBuffer(CircleBuffer_t* cb);
int RewindBuffer(CircleBuffer_t* cb, int64_t len);
int ForwardBuffer(CircleBuffer_t* cb, int64_t len);
void CircleReport(const CircleBuffer_t* cb, const char* title);
int CirclePercent(CircleBuffer_t* cb);
int CircleAtLevel(CircleBuffer_t* cb);
int CircleOverLevel(CircleBuffer_t* cb);
typedef enum {
CB_NOERR = 0, /* OK */
CB_FULL = -1, /* Buffer overflow */
CB_MAX_LEVEL = -2, /* Buffer is over target full level (percent) */
CB_MIN_LEVEL = -3, /* Buffer is under target min level (percent) */
CB_EMPTY = -4 /* Buffer is empty */
} CB_Err_t;
#if defined(__cplusplus)
}
#endif
#endif