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usable sync of ringbuffer

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This commit is contained in:
degasus 2013-02-01 16:43:08 +01:00
parent 3af9840a4c
commit 3bf4ffe7fa
2 changed files with 39 additions and 16 deletions
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52
Source/Plugins/Plugin_VideoOGL/Src/StreamBuffer.cpp
View file

@ -26,12 +26,12 @@ namespace OGL
static const u32 SYNC_POINTS = 16;
StreamBuffer::StreamBuffer(u32 type, size_t size, StreamType uploadType)
: m_uploadtype(uploadType), m_buffertype(type), m_size(size), m_iterator(0), m_last_iterator(0)
: m_uploadtype(uploadType), m_buffertype(type), m_size(size), m_iterator(0), m_used_iterator(0), m_free_iterator(0)
{
glGenBuffers(1, &m_buffer);
if(m_uploadtype == STREAM_DETECT)
m_uploadtype = MAP_AND_ORPHAN;
m_uploadtype = MAP_AND_SYNC;
Init();
}
@ -42,6 +42,8 @@ StreamBuffer::~StreamBuffer()
glDeleteBuffers(1, &m_buffer);
}
#define SLOT(x) (x)*SYNC_POINTS/m_size
void StreamBuffer::Alloc ( size_t size, u32 stride )
{
size_t m_iterator_aligned = m_iterator;
@ -49,35 +51,57 @@ void StreamBuffer::Alloc ( size_t size, u32 stride )
m_iterator_aligned--;
m_iterator_aligned = m_iterator_aligned - (m_iterator_aligned % stride) + stride;
}
size_t iter_end = m_iterator_aligned + size;
switch(m_uploadtype) {
case MAP_AND_ORPHAN:
if(m_iterator_aligned+size >= m_size) {
if(iter_end >= m_size) {
glBufferData(m_buffertype, m_size, NULL, GL_STREAM_DRAW);
m_iterator_aligned = 0;
}
break;
case MAP_AND_SYNC:
for(u32 i=m_iterator*SYNC_POINTS/m_size+1; i<(m_iterator_aligned+size)*SYNC_POINTS/m_size+1 && i < SYNC_POINTS; i++)
// insert waiting slots for used memory
for(u32 i=SLOT(m_used_iterator); i<SLOT(m_iterator); i++)
{
fences[i] = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
}
m_used_iterator = m_iterator;
// wait for new slots to end of buffer
for(u32 i=SLOT(m_free_iterator)+1; i<=SLOT(iter_end) && i < SYNC_POINTS; i++)
{
glClientWaitSync(fences[i], GL_SYNC_FLUSH_COMMANDS_BIT, GL_TIMEOUT_IGNORED);
glDeleteSync(fences[i]);
}
m_free_iterator = iter_end;
if(m_iterator_aligned+size >= m_size) {
for(u32 i=m_last_iterator*SYNC_POINTS/m_size; i < SYNC_POINTS; i++)
// if buffer is full
if(iter_end >= m_size) {
// insert waiting slots in unused space at the end of the buffer
for(u32 i=SLOT(m_used_iterator); i < SYNC_POINTS; i++)
fences[i] = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
m_iterator_aligned = 0;
m_last_iterator = 0;
glClientWaitSync(fences[0], GL_SYNC_FLUSH_COMMANDS_BIT, GL_TIMEOUT_IGNORED);
glDeleteSync(fences[0]);
// move to the start
m_used_iterator = m_iterator_aligned = m_iterator = 0; // offset 0 is always aligned
iter_end = size;
// wait for space at the start
for(u32 i=0; i<=SLOT(iter_end); i++)
{
glClientWaitSync(fences[i], GL_SYNC_FLUSH_COMMANDS_BIT, GL_TIMEOUT_IGNORED);
glDeleteSync(fences[i]);
}
m_free_iterator = iter_end;
}
break;
case BUFFERSUBDATA:
m_iterator_aligned = 0;
break;
}
m_iterator = m_iterator_aligned;
}
@ -85,8 +109,6 @@ size_t StreamBuffer::Upload ( u8* data, size_t size )
{
switch(m_uploadtype) {
case MAP_AND_SYNC:
for(u32 i=m_last_iterator*SYNC_POINTS/m_size; i<m_iterator*SYNC_POINTS/m_size; i++)
fences[i] = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
case MAP_AND_ORPHAN:
pointer = (u8*)glMapBufferRange(m_buffertype, m_iterator, size, GL_MAP_WRITE_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
if(pointer) {
@ -100,9 +122,9 @@ size_t StreamBuffer::Upload ( u8* data, size_t size )
glBufferSubData(m_buffertype, m_iterator, size, data);
break;
}
m_last_iterator = m_iterator;
size_t ret = m_iterator;
m_iterator += size;
return m_last_iterator;
return ret;
}
void StreamBuffer::Init()

3
Source/Plugins/Plugin_VideoOGL/Src/StreamBuffer.h
View file

@ -53,7 +53,8 @@ private:
size_t m_size;
u8 *pointer;
size_t m_iterator;
size_t m_last_iterator;
size_t m_used_iterator;
size_t m_free_iterator;
GLsync *fences;
};