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Added more specific decrement functions

This commit is contained in:
saxon 2018-07-16 14:37:26 +09:30
parent d1362d659f
commit 376a694cd9
1 changed files with 44 additions and 21 deletions
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65
rtmp/rtmp.go
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@ -87,6 +87,8 @@ func AVC(str string) C.AVal {
// av_setDataFrame is a static const global in rtmp.c
var setDataFrame = AVC("@setDataFrame")
var packetSize = [...]int32{ 12, 8, 4, 1}
// Session provides an interface for sending flv tags over rtmp.
type Session interface {
Open() error
@ -263,21 +265,24 @@ func sendPacket(r *C.RTMP, packet *C.RTMPPacket, queue int) int {
if packet.m_nChannel >= r.m_channelsAllocatedOut {
n := int(packet.m_nChannel+10)
packets := C.realloc(r.m_vecChannelsOut, unsafe.Sizeof(*C.RTMPPacket) * n)
var tmp *C.RTMPPacket
packets := C.realloc(unsafe.Pointer(r.m_vecChannelsOut),
C.ulong(unsafe.Sizeof(tmp) * uintptr(n)))
if packets == 0 {
C.free(r.m_vecChannelsOut)
if uintptr(packets) == uintptr(0) {
C.free(unsafe.Pointer(r.m_vecChannelsOut))
r.m_vecChannelsOut = nil
r.m_channelsAllocatedOut = 0
return 0
}
r.m_vecChannelsOut = packets
C.memset(r.m_vecChannelsOut + r.m_channelsAllocatedOut, 0,
unsafe.Sizeof(*RTMPPacket) * (n-r.m_channelsAllocatedOut))
r.m_channelsAllocatedOut = n
r.m_vecChannelsOut = (**C.RTMPPacket)(packets)
C.memset(incPtr(unsafe.Pointer(r.m_vecChannelsOut), int(r.m_channelsAllocatedOut),
int(unsafe.Sizeof(tmp))), 0, C.ulong(unsafe.Sizeof(tmp) *
uintptr(n-int(r.m_channelsAllocatedOut))))
r.m_channelsAllocatedOut = C.int(n)
}
prevPackt = *(**C.RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsOut),
packet.m_nChannel))
prevPacket = *(**C.RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsOut),
int(packet.m_nChannel), int(unsafe.Sizeof(packet))))
if prevPacket != nil && packet.m_headerType != RTMP_PACKET_SIZE_LARGE {
// compress a bit by using the prev packet's attributes
@ -290,11 +295,11 @@ func sendPacket(r *C.RTMP, packet *C.RTMPPacket, queue int) int {
if prevPacket.m_nTimeStamp == packet.m_nTimeStamp &&
packet.m_headerType == RTMP_PACKET_SIZE_SMALL {
packet.m_headerType = RTMP_PACKET_SIZE_MINIMUM
// TODO: port this constant
packet.m_headerType = C.RTMP_PACKET_SIZE_MINIMUM
}
last = prevPacket.m_nTimeStamp
last = int(prevPacket.m_nTimeStamp)
}
if packet.m_headerType > 3 {
@ -303,13 +308,13 @@ func sendPacket(r *C.RTMP, packet *C.RTMPPacket, queue int) int {
return 0
}
nSize = int(*(*int)(incPtr(unsafe.Pointer(packetSize),int(packet.m_headerType))))
nSize = int(*(*int)(incInt32Ptr(unsafe.Pointer(&packetSize[0]),int(packet.m_headerType))))
hSize = nSize
cSize = 0
t = packet.m_nTimeStamp - last
t = int32(int(packet.m_nTimeStamp) - last)
if packet.m_body {
header = packet.m_body - nSize
if packet.m_body != nil {
header = decPtr(unsafe.Pointer(packet.m_body), nSize,
hend = packet.m_body
} else {
header = incPtr(hbuf,6)
@ -572,20 +577,20 @@ func indxInt64Ptr(ptr unsafe.Pointer, inc int) int64 {
return *(*int64)(incPtr(ptr, inc, int64Size))
}
// incBytePtr returns an unsafe.Pointer to a byte that is inc positions
// incBytePtr returns an unsafe.Pointer to a byte that is inc positive positions
// from the passed ptr
func incBytePtr(ptr unsafe.Pointer, inc int) unsafe.Pointer {
return incPtr(ptr,inc,byteSize)
}
// incInt32Ptr returns an unsafe.Pointer to an int32 that is inc positions from
// the passed ptr
// incInt32Ptr returns an unsafe.Pointer to an int32 that is inc positive
// positions from the passed ptr
func incInt32Ptr(ptr unsafe.Pointer, inc int) unsafe.Pointer {
return incPtr(ptr,inc,int32Size)
}
// incInt64Ptr returns an unsafe.Pointer to an int64 that is inc positions from
// the passed ptr
// incInt64Ptr returns an unsafe.Pointer to an int64 that is inc positive
// positions from the passed ptr
func incInt64Ptr(ptr unsafe.Pointer, inc int) unsafe.Pointer {
return incPtr(ptr,inc,int64Size)
}
@ -600,6 +605,24 @@ func decPtr(ptr unsafe.Pointer, dec, typeSize int) unsafe.Pointer {
return unsafe.Pointer(uintptr(ptr) - uintptr(dec*typeSize))
}
// decBytePtr returns an unsafe.Pointer to a byte that is dec negative positions
// from ptr
func decBytePtr(ptr unsafe.Pointer, dec int) unsafe.Pointer {
return decPtr(ptr,dec,byteSize)
}
// decBytePtr returns an unsafe.Pointer to a int32 that is dec negative positions
// from ptr
func decInt32Ptr(ptr unsafe.Pointer, dec int) unsafe.Pointer {
return decPtr(ptr,dec,int32Size)
}
// decBytePtr returns an unsafe.Pointer to a int64 that is dec negative positions
// from ptr
func decInt64Ptr(ptr unsafe.Pointer, dec int) unsafe.Pointer {
return decPTr(ptr,dec,int64Size)
}
// sliceToPtr get's the address of the first data element and returns as unsafe
// pointer
func sliceToPtr(data []byte) unsafe.Pointer {