ntv2player8k.cpp File Reference

Implementation of ntv2player8k class. More...

#include "ntv2player8k.h"
#include "ntv2debug.h"
#include "ntv2devicescanner.h"
#include "ntv2testpatterngen.h"
#include "ajabase/common/timebase.h"
#include "ajabase/system/process.h"

Include dependency graph for ntv2player8k.cpp:

Go to the source code of this file.

Macros
#define	NTV2_BUFFER_LOCKING

Functions
static ULWord	gAncMaxSizeBytes (NTV2_ANCSIZE_MAX)
	The maximum number of bytes of ancillary data that can be transferred for a single field. Each driver instance sets this maximum to the 8K default at startup. It can be changed at runtime, so it's sampled and reset in SetUpVideo. More...
static const uint32_t	gAudMaxSizeBytes (256 *1024)
	The maximum number of bytes of 48KHz audio that can be transferred for a single frame. Worst case, assuming 16 channels of audio (max), 4 bytes per sample, and 67 msec per frame (assuming the lowest possible frame rate of 14.98 fps)... 48,000 samples per second requires 3,204 samples x 4 bytes/sample x 16 = 205,056 bytes 201K min will suffice, with 768 bytes to spare But it could be more efficient for page-aligned (and page-locked) memory to round to 256K. More...
static const bool	BUFFER_PAGE_ALIGNED ((!(0)))
static const ULWord	gNumFrequencies (sizeof(gFrequencies)/sizeof(double))

Variables
static const double	gFrequencies [] = {250.0, 500.0, 1000.0, 2000.0}

Detailed Description

Implementation of ntv2player8k class.

Copyright

(C) 2013-2022 AJA Video Systems, Inc. All rights reserved.

Definition in file ntv2player8k.cpp.

Macro Definition Documentation

NTV2_BUFFER_LOCKING

#define NTV2_BUFFER_LOCKING

Definition at line 17 of file ntv2player8k.cpp.

Function Documentation

BUFFER_PAGE_ALIGNED()

static const bool BUFFER_PAGE_ALIGNED ( (!(0))  )

static

gAncMaxSizeBytes()

static ULWord gAncMaxSizeBytes ( NTV2_ANCSIZE_MAX  )

static

The maximum number of bytes of ancillary data that can be transferred for a single field. Each driver instance sets this maximum to the 8K default at startup. It can be changed at runtime, so it's sampled and reset in SetUpVideo.

gAudMaxSizeBytes()

static const uint32_t gAudMaxSizeBytes ( 256 *  1024 )

static

The maximum number of bytes of 48KHz audio that can be transferred for a single frame. Worst case, assuming 16 channels of audio (max), 4 bytes per sample, and 67 msec per frame (assuming the lowest possible frame rate of 14.98 fps)... 48,000 samples per second requires 3,204 samples x 4 bytes/sample x 16 = 205,056 bytes 201K min will suffice, with 768 bytes to spare But it could be more efficient for page-aligned (and page-locked) memory to round to 256K.

gNumFrequencies()

static const ULWord gNumFrequencies ( sizeof(gFrequencies)/sizeof(double)  )

static

Variable Documentation

gFrequencies

const double gFrequencies[] = {250.0, 500.0, 1000.0, 2000.0}

static

Definition at line 40 of file ntv2player8k.cpp.