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#include "gvFrame.h"
#include "gvCodec.h"
// packets are only accepted if they are frameStamped to be played
// within this many frames from the current play clock
#define GVI_INCOMING_PACKET_TIMEFRAME_FRAMES (GVI_FRAMESTAMP_MAX / 2)
#define GVI_PREALLOCATED_FRAMES 200
#if defined(_PS2) || defined(_PSP)
#define GVI_DYNAMICALLY_ALLOCATE_FRAMES 0
#else
#define GVI_DYNAMICALLY_ALLOCATE_FRAMES 1
#endif
// list of available frames
static GVIPendingFrame * GVIAvailableFrames;
GVBool gviIsFrameStampGT(GVFrameStamp a, GVFrameStamp b)
{
return ((GVFrameStamp)(b - a) > GVI_INCOMING_PACKET_TIMEFRAME_FRAMES);
}
GVBool gviIsFrameStampGTE(GVFrameStamp a, GVFrameStamp b)
{
return ((GVFrameStamp)(b - a - 1) > GVI_INCOMING_PACKET_TIMEFRAME_FRAMES);
}
static void gviFreePendingFrame(GVIPendingFrame * frame)
{
gsifree(frame);
}
static GVIPendingFrame * gviNewPendingFrame(void)
{
GVIPendingFrame * frame;
// allocate a new frame
#if GVI_PRE_DECODE
frame = (GVIPendingFrame *)gsimalloc(sizeof(GVIPendingFrame) + GVIBytesPerFrame - sizeof(GVSample));
#else
frame = (GVIPendingFrame *)gsimalloc(sizeof(GVIPendingFrame) + GVIEncodedFrameSize - 1);
#endif
// return it
return frame;
}
void gviPutPendingFrame(GVIPendingFrame * frame)
{
// put the frame back in the available frames list
frame->m_next = GVIAvailableFrames;
GVIAvailableFrames = frame;
}
GVIPendingFrame * gviGetPendingFrame(void)
{
GVIPendingFrame * frame;
// check the available frames list
if(GVIAvailableFrames)
{
frame = GVIAvailableFrames;
GVIAvailableFrames = frame->m_next;
return frame;
}
#if GVI_DYNAMICALLY_ALLOCATE_FRAMES
// allocate a new frame
return gviNewPendingFrame();
#else
// we can't dynamically allocate frames
return NULL;
#endif
}
void gviFramesStartup(void)
{
GVIPendingFrame * frame;
int i;
if(GVIAvailableFrames)
gviFramesCleanup();
GVIAvailableFrames = NULL;
for(i = 0 ; i < GVI_PREALLOCATED_FRAMES ; i++)
{
frame = gviNewPendingFrame();
if(!frame)
return;
frame->m_next = GVIAvailableFrames;
GVIAvailableFrames = frame;
}
}
void gviFramesCleanup(void)
{
GVIPendingFrame * next;
while(GVIAvailableFrames)
{
next = GVIAvailableFrames->m_next;
gviFreePendingFrame(GVIAvailableFrames);
GVIAvailableFrames = next;
}
}
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