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/*
NAME
rtmp.go
DESCRIPTION
See Readme.md
AUTHORS
Saxon Nelson-Milton <saxon@ausocean.org>
Dan Kortschak <dan@ausocean.org>
LICENSE
rtmp.go is Copyright (C) 2017 the Australian Ocean Lab (AusOcean)
It is free software: you can redistribute it and/or modify them
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
It is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with revid in gpl.txt. If not, see http://www.gnu.org/licenses.
Derived from librtmp under the GNU Lesser General Public License 2.1
Copyright (C) 2005-2008 Team XBMC http://www.xbmc.org
Copyright (C) 2008-2009 Andrej Stepanchuk
Copyright (C) 2009-2010 Howard Chu
*/
package rtmp
/*
#include <stdlib.h>
#include <unistd.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
typedef struct sockaddr_in sockaddr_in;
typedef struct sockaddr sockaddr;
*/
import "C"
import (
"bytes"
"errors"
"fmt"
"log"
"math/rand"
"strconv"
"strings"
"time"
"unsafe"
"github.com/chamaken/cgolmnl/inet"
)
const _Gi = 1 << 30
const (
minDataSize = 11
debugMode = false
length = 512
)
const (
// av_setDataFrame is a static const global in rtmp.c
setDataFrame = "@setDataFrame"
av__checkbw = "_checkbw"
av__onbwcheck = "_onbwcheck"
av__onbwdone = "_onbwdone"
av__result = "_result"
av_app = "app"
av_audioCodecs = "audioCodecs"
av_capabilities = "capabilities"
av_close = "close"
av_code = "code"
av_connect = "connect"
av_createStream = "createStream"
av_deleteStream = "deleteStream"
av_FCPublish = "FCPublish"
av_FCUnpublish = "FCUnpublish"
av_flashVer = "flashVer"
av_fpad = "fpad"
av_level = "level"
av_live = "live"
av_NetConnection_Connect_InvalidApp = "NetConnection.Connect.InvalidApp"
av_NetStream_Failed = "NetStream.Failed"
av_NetStream_Pause_Notify = "NetStream.Pause.Notify"
av_NetStream_Play_Complete = "NetStream.Play.Complete"
av_NetStream_Play_Failed = "NetStream.Play.Failed"
av_NetStream_Play_PublishNotify = "NetStream.Play.PublishNotify"
av_NetStream_Play_Start = "NetStream.Play.Start"
av_NetStream_Play_Stop = "NetStream.Play.Stop"
av_NetStream_Play_StreamNotFound = "NetStream.Play.StreamNotFound"
av_NetStream_Play_UnpublishNotify = "NetStream.Play.UnpublishNotify"
av_NetStream_Publish_Start = "NetStream.Publish.Start"
av_NetStream_Seek_Notify = "NetStream.Seek.Notify"
av_nonprivate = "nonprivate"
av_objectEncoding = "objectEncoding"
av_onBWDone = "onBWDone"
av_onFCSubscribe = "onFCSubscribe"
av_onFCUnsubscribe = "onFCUnsubscribe"
av_onStatus = "onStatus"
av_pageUrl = "pageUrl"
av_ping = "ping"
av_play = "play"
av_playlist_ready = "playlist_ready"
av_publish = "publish"
av_releaseStream = "releaseStream"
av_secureToken = "secureToken"
av_set_playlist = "set_playlist"
av_swfUrl = "swfUrl"
av_tcUrl = "tcUrl"
av_type = "type"
av_videoCodecs = "videoCodecs"
av_videoFunction = "videoFunction"
)
var RTMPT_cmds = []string{
"open",
"send",
"idle",
"close",
}
var (
packetSize = [...]int{12, 8, 4, 1}
RTMPProtocolStringsLower = [...]string{
"rtmp",
"rtmpt",
"rtmpe",
"rtmpte",
"rtmps",
"rtmpts",
"",
"",
"rtmfp",
}
)
func startSession(rtmp *C_RTMP, u string, timeout uint32) (*C_RTMP, error) {
connect_timeout := int32(timeout)
rtmp = C_RTMP_Alloc()
C_RTMP_Init(rtmp)
rtmp.Link.timeout = connect_timeout
if !C_RTMP_SetupURL(rtmp, u) {
C_RTMP_Close(rtmp)
//C.RTMP_Free(rtmp)
return nil, errors.New("rtmp startSession: Failed to setup URL!")
}
C_RTMP_EnableWrite(rtmp)
C_RTMP_SetBufferMS(rtmp, 3600*1000)
if !C_RTMP_Connect(rtmp, nil) {
C_RTMP_Close(rtmp)
//C.RTMP_Free(rtmp)
return nil, errors.New("rtmp startSession: Failed to connect!")
}
// TODO: port this
if !C_RTMP_ConnectStream(rtmp, 0) {
C_RTMP_Close(rtmp)
//C.RTMP_Free(rtmp)
return nil, errors.New("rtmp startSession: Failed to connect stream!")
}
return rtmp, nil
}
func endSession(rtmp *C_RTMP) uint32 {
if rtmp == nil {
return 3
}
C_RTMP_Close(rtmp)
//C.RTMP_Free(rtmp)
return 0
}
// uint32_t RTMP_GetTime();
// rtmp.c +156
func C_RTMP_GetTime() int32 {
return int32(time.Now().UnixNano() / 1000000)
}
// int RTMPPacket_Alloc(RTMPPacket* p, uint32_t nSize);
// rtmp.c +189
func C_RTMPPacket_Alloc(p *C_RTMPPacket, nSize uint32) (ok bool) {
var ptr *byte
// TODO: port C.SIZE_MAX
// also work out how to deal with the overfloat
/*
if int64(nSize) > (C.SIZE_MAX - RTMP_MAX_HEADER_SIZE) {
return 0
}
*/
ptr = (*byte)(calloc(1, uintptr(nSize+RTMP_MAX_HEADER_SIZE)))
if ptr == nil {
return false
}
p.m_body = (*byte)(incBytePtr(unsafe.Pointer(ptr), RTMP_MAX_HEADER_SIZE))
p.m_nBytesRead = 0
return true
}
// void RTMPPacket_Free(RTMPPacket* p);
// rtmp.c +203
func C_RTMPPacket_Free(p *C_RTMPPacket) {
if p.m_body != nil {
p.m_body = nil
}
}
// RTMP* RTMP_IsConnected();
// rtmp.c +317
func C_RTMP_Alloc() *C_RTMP {
return &C_RTMP{}
}
// void RTMP_Init(RTMP *r);
// rtmp.c +329
func C_RTMP_Init(r *C_RTMP) {
*r = C_RTMP{}
r.m_sb.sb_socket = -1
r.m_inChunkSize = RTMP_DEFAULT_CHUNKSIZE
r.m_outChunkSize = RTMP_DEFAULT_CHUNKSIZE
r.m_nBufferMS = 30000
r.m_nClientBW = 2500000
r.m_nClientBW2 = 2
r.m_nServerBW = 2500000
r.m_fAudioCodecs = 3191.0
r.m_fVideoCodecs = 252.0
r.Link.timeout = 30
r.Link.swfAge = 30
}
// void RTMP_EnableWrite(RTMP *r);
// rtmp.c +351
func C_RTMP_EnableWrite(r *C_RTMP) {
r.Link.protocol |= RTMP_FEATURE_WRITE
}
// int RTMP_IsConnected(RTMP *r);
// rtmp.c +363
func C_RTMP_IsConnected(r *C_RTMP) int32 {
if r.m_sb.sb_socket != -1 {
return 1
}
return 0
}
// void RTMP_SetBufferMS(RTMP *r, int size);
// rtmp.c +381
func C_RTMP_SetBufferMS(r *C_RTMP, size int32) {
r.m_nBufferMS = int32(size)
}
// void SocksSetup(RTMP *r, C_AVal* sockshost);
// rtmp.c +410
func C_SocksSetup(r *C_RTMP, sockshost string) {
if sockshost != "" {
p := strings.SplitN(sockshost, ":", 2)
r.Link.sockshost = p[0]
r.Link.socksport = 1080
if len(p) != 1 {
port, err := strconv.Atoi(p[1])
if err != nil {
port = 1080
log.Println("C_SocksSetup: bad string conversion!")
}
r.Link.socksport = uint16(port)
}
} else {
r.Link.sockshost = ""
r.Link.socksport = 0
}
}
// int RTMP_SetupURL(RTMP *r, char* url);
// rtmp.c +757
// NOTE: code dealing with rtmp over http has been disregarded
func C_RTMP_SetupURL(r *C_RTMP, addr string) (ok bool) {
r.Link.protocol, r.Link.hostname, r.Link.port, r.Link.app, r.Link.playpath0, ok = C_RTMP_ParseURL(addr)
if !ok {
return false
}
r.Link.playpath = r.Link.playpath0
if r.Link.tcUrl == "" {
if r.Link.app != "" {
r.Link.tcUrl = fmt.Sprintf("%v://%v:%v/%v",
RTMPProtocolStringsLower[r.Link.protocol], r.Link.hostname, r.Link.port, r.Link.app)
r.Link.lFlags |= RTMP_LF_FTCU
} else {
r.Link.tcUrl = addr
}
}
C_SocksSetup(r, r.Link.sockshost)
if r.Link.port == 0 {
switch {
case (r.Link.protocol & RTMP_FEATURE_SSL) != 0:
r.Link.port = 433
case (r.Link.protocol & RTMP_FEATURE_HTTP) != 0:
r.Link.port = 80
default:
r.Link.port = 1935
}
}
return true
}
// int add_addr_info(struct sockaddr_in *service, AVal *host, int port)
// rtmp.c +869
func C_add_addr_info(service *C.sockaddr_in, hostname string, port uint16) (ok bool) {
h := (*C.char)(unsafe.Pointer(goStrToCStr(hostname)))
service.sin_addr.s_addr = C.inet_addr(h)
if service.sin_addr.s_addr == C.INADDR_NONE {
host := C.gethostbyname(h)
if host == nil || *host.h_addr_list == nil {
//RTMP_Log(RTMP_LOGERROR, "Problem accessing the DNS. (addr: %s)", hostname)
return false
}
service.sin_addr = *(*C.struct_in_addr)(unsafe.Pointer(*host.h_addr_list))
}
service.sin_port = C.ushort(inet.Htons(port))
return true
}
// int RTMP_Connect0(RTMP *r, struct sockaddr* service);
// rtmp.c +906
func C_RTMP_Connect0(r *C_RTMP, service *C.sockaddr) (ok bool) {
on := 1
r.m_sb.sb_timedout = 0
r.m_pausing = 0
r.m_fDuration = 0
r.m_sb.sb_socket = int32(C.socket(C.AF_INET, C.SOCK_STREAM, C.IPPROTO_TCP))
if r.m_sb.sb_socket != -1 {
if C.connect(C.int(r.m_sb.sb_socket), service, C.socklen_t(unsafe.Sizeof(*service))) < 0 {
log.Println("C_RTMP_Connect0, failed to connect socket.")
}
if r.Link.socksport != 0 {
if debugMode {
log.Println("C_RTMP_Connect0: socks negotiation.")
}
if !C_SocksNegotiate(r) {
log.Println("C_RTMP_Connect0: SOCKS negotiation failed.")
return false
}
}
} else {
log.Println("C_RTMP_Connect0: failed to create socket.")
return false
}
{
var tv int32
SET_RCVTIMEO(&tv, int32(r.Link.timeout))
if C.setsockopt(C.int(r.m_sb.sb_socket), C.SOL_SOCKET, C.SO_RCVTIMEO,
unsafe.Pointer(&tv), C.socklen_t(unsafe.Sizeof(tv))) != 0 {
log.Println("C_RTMP_Connect0: Setting socket timeout failed")
}
}
C.setsockopt(C.int(r.m_sb.sb_socket), C.IPPROTO_TCP, C.TCP_NODELAY,
unsafe.Pointer(&on), C.socklen_t(unsafe.Sizeof(on)))
return true
}
// int RTMP_Connect1(RTMP* r, RTMPPacket* cp);
// rtmp.c +978
func C_RTMP_Connect1(r *C_RTMP, cp *C_RTMPPacket) (ok bool) {
if debugMode {
log.Println("... connected, handshaking...")
}
if !C_HandShake(r, 1) {
log.Println("C_RTMP_Connect1: handshake failed!")
return false
}
if debugMode {
log.Println("... handshaked...")
}
if !C_SendConnectPacket(r, cp) {
log.Println("RTMP connect failed!")
return false
}
return true
}
// int RTMP_Connect(RTMP *r, RTMPPacket* cp);
// rtmp.c +1032
func C_RTMP_Connect(r *C_RTMP, cp *C_RTMPPacket) (ok bool) {
// TODO: port this
var service C.sockaddr_in
if r.Link.hostname == "" {
return false
}
memset((*byte)(unsafe.Pointer(&service)), 0, int(unsafe.Sizeof(service)))
// TODO: port this
service.sin_family = C.AF_INET
if r.Link.socksport != 0 {
if !C_add_addr_info(&service, r.Link.sockshost, r.Link.socksport) {
return false
}
} else {
// connect directly
if !C_add_addr_info(&service, r.Link.hostname, r.Link.port) {
return false
}
}
if !C_RTMP_Connect0(r, (*C.sockaddr)(unsafe.Pointer(&service))) {
return false
}
r.m_bSendCounter = 1
return C_RTMP_Connect1(r, cp)
}
// int SocksNegotiate(RTMP* r);
// rtmp.c +1062
func C_SocksNegotiate(r *C_RTMP) (ok bool) {
var addr int32
var service C.sockaddr_in
memset((*byte)(unsafe.Pointer(&service)), 0, int(unsafe.Sizeof(service)))
C_add_addr_info(&service, r.Link.hostname, r.Link.port)
addr = int32(inet.Htonl(uint32(service.sin_addr.s_addr)))
{
packet := []byte{
4, 1,
byte((r.Link.port >> 8) & 0xFF),
byte((r.Link.port) & 0xFF),
byte(addr>>24) & 0xFF, byte(addr>>16) & 0xFF,
byte(addr>>8) & 0xFF, byte(addr) & 0xFF,
0,
}
C_WriteN(r, unsafe.Pointer(&packet[0]), int(unsafe.Sizeof(packet)))
if C_ReadN(r, &packet[0], 8) != 8 {
return false
}
if packet[0] == 0 && packet[1] == 90 {
return true
} else {
// TODO: use new logger here
log.Println("C_SocksNegotitate: SOCKS returned error code!")
return false
}
}
}
// int RTMP_ConnectStream(RTMP* r, int seekTime);
// rtmp.c +1099
func C_RTMP_ConnectStream(r *C_RTMP, seekTime int32) (playing bool) {
var packet C_RTMPPacket
memset((*byte)(unsafe.Pointer(&packet)), 0, int(unsafe.Sizeof(packet)))
if seekTime > 0 {
r.Link.seekTime = int32(seekTime)
}
r.m_mediaChannel = 0
// TODO: read packet
for !r.m_bPlaying && C_RTMP_IsConnected(r) != 0 && C_RTMP_ReadPacket(r, &packet) {
// TODO: port is ready
if C_RTMPPacket_IsReady(&packet) {
if packet.m_nBodySize == 0 {
continue
}
if packet.m_packetType == RTMP_PACKET_TYPE_AUDIO ||
packet.m_packetType == RTMP_PACKET_TYPE_VIDEO ||
packet.m_packetType == RTMP_PACKET_TYPE_INFO {
log.Println("C_RTMP_ConnectStream: got packet before play()! Ignoring.")
C_RTMPPacket_Free(&packet)
continue
}
C_RTMP_ClientPacket(r, &packet)
C_RTMPPacket_Free(&packet)
}
}
return r.m_bPlaying
}
// int RTMP_ClientPacket()
// rtmp.c +1226
// NOTE cases have been commented out that are not currently used by AusOcean
func C_RTMP_ClientPacket(r *C_RTMP, packet *C_RTMPPacket) int32 {
var bHasMediaPacket int32
switch packet.m_packetType {
case RTMP_PACKET_TYPE_CHUNK_SIZE:
// TODO: port this
C_HandleChangeChunkSize(r, packet)
case RTMP_PACKET_TYPE_BYTES_READ_REPORT:
// TODO: usue new logger here
//RTMP_Log(RTMP_LOGDEBUG, "%s, received: bytes read report", __FUNCTION__);
case RTMP_PACKET_TYPE_CONTROL:
panic("Unsupported packet type RTMP_PACKET_TYPE_CONTROL")
/*
log.Println("RTMP_PACKET_TYPE_CONTROL")
// TODO: port this
C.HandleCtrl(r, packet)
*/
case RTMP_PACKET_TYPE_SERVER_BW:
// TODO: port this
C_HandlServerBW(r, packet)
case RTMP_PACKET_TYPE_CLIENT_BW:
// TODO: port this
C_HandleClientBW(r, packet)
case RTMP_PACKET_TYPE_AUDIO:
panic("Unsupported packet type RTMP_PACKET_TYPE_AUDIO")
case RTMP_PACKET_TYPE_VIDEO:
panic("Unsupported packet type RTMP_PACKET_TYPE_VIDEO")
case RTMP_PACKET_TYPE_FLEX_MESSAGE:
panic("Unsupported packet type RTMP_PACKET_TYPE_FLEX_MESSAGE")
case RTMP_PACKET_TYPE_INFO:
panic("Unsupported packet type RTMP_PACKET_TYPE_INFO")
case RTMP_PACKET_TYPE_INVOKE:
log.Println("RTMP_PACKET_TYPE_INVOKE:")
// TODO use new logger here
//RTMP_Log(RTMP_LOGDEBUG, "%s, received: invoke %u bytes", __FUNCTION__,packet.m_nBodySize);
if C_HandleInvoke(r, (*byte)(unsafe.Pointer(packet.m_body)), uint32(packet.m_nBodySize)) {
// This will never happen with the methods we implement.
log.Println("HasMediaPacket")
bHasMediaPacket = 2
}
case RTMP_PACKET_TYPE_FLASH_VIDEO:
panic("Unsupported packet type RTMP_PACKET_TYPE_FLASH_VIDEO")
default:
// TODO use new logger here
// RTMP_Log(RTMP_LOGDEBUG, "%s, unknown packet type received: 0x%02x", __FUNCTION__,packet.m_packetType);
}
return bHasMediaPacket
}
// int ReadN(RTMP* r, char* buffer, int n);
// rtmp.c +1390
func C_ReadN(r *C_RTMP, buffer *byte, n int) int {
nOriginalSize := n
var avail int
var ptr *byte
r.m_sb.sb_timedout = 0
ptr = buffer
for n > 0 {
nBytes := 0
var nRead int
avail = int(r.m_sb.sb_size)
if avail == 0 {
if C_RTMPSockBuf_Fill(&r.m_sb) < 1 {
if r.m_sb.sb_timedout == 0 {
return 0
}
}
avail = int(r.m_sb.sb_size)
}
if n < avail {
nRead = n
} else {
nRead = avail
}
if nRead > 0 {
memmove(unsafe.Pointer(ptr), unsafe.Pointer(r.m_sb.sb_start), uintptr(nRead))
r.m_sb.sb_start = (*byte)(incBytePtr(unsafe.Pointer(r.m_sb.sb_start),
nRead))
r.m_sb.sb_size -= int32(nRead)
nBytes = nRead
r.m_nBytesIn += int32(nRead)
if r.m_bSendCounter != 0 && r.m_nBytesIn > (r.m_nBytesInSent+
r.m_nClientBW/10) {
if !C_SendBytesReceived(r) {
return 0
}
}
}
if nBytes == 0 {
log.Println("RTMP socket closed by peer")
C_RTMP_Close(r)
break
}
n -= nBytes
ptr = (*byte)(incBytePtr(unsafe.Pointer(ptr), nBytes))
}
return nOriginalSize - n
}
// int WriteN(RTMP* r, const char* buffer, int n);
// rtmp.c +1502
func C_WriteN(r *C_RTMP, buffer unsafe.Pointer, n int) (ok bool) {
ptr := buffer
for n > 0 {
var nBytes int
nBytes = int(C_RTMPSockBuf_Send(&r.m_sb, (*byte)(ptr), int32(n)))
if nBytes < 0 {
if debugMode {
log.Println("C_WriteN, RTMP send error")
}
// TODO: port this
C_RTMP_Close(r)
n = 1
break
}
if nBytes == 0 {
break
}
n -= nBytes
ptr = incBytePtr(ptr, nBytes)
}
// !ok here is equivalent to io.ErrShortWrite.
return n == 0
}
// int SendConnectPacket(RTMP* r, RTMPPacket* cp);
// rtmp.c +1579
func C_SendConnectPacket(r *C_RTMP, cp *C_RTMPPacket) (ok bool) {
var packet C_RTMPPacket
var pbuf [4096]byte
pend := (*byte)(unsafe.Pointer(incBytePtr(unsafe.Pointer(&pbuf[0]),
int(unsafe.Sizeof(pbuf)))))
var enc *byte
if cp != nil {
return C_RTMP_SendPacket(r, cp, 1)
}
packet.m_nChannel = 0x03
packet.m_headerType = RTMP_PACKET_SIZE_LARGE
packet.m_packetType = RTMP_PACKET_TYPE_INVOKE
packet.m_nTimeStamp = 0
packet.m_nInfoField2 = 0
packet.m_hasAbsTimestamp = 0
packet.m_body = &pbuf[RTMP_MAX_HEADER_SIZE]
enc = (*byte)(unsafe.Pointer(packet.m_body))
enc = C_AMF_EncodeString(enc, pend, av_connect)
r.m_numInvokes += 1
enc = C_AMF_EncodeNumber(enc, pend, float64(r.m_numInvokes))
(*[_Gi]byte)(unsafe.Pointer(enc))[0] = AMF_OBJECT
enc = (*byte)(unsafe.Pointer(incBytePtr(unsafe.Pointer(enc), 1)))
enc = C_AMF_EncodeNamedString(enc, pend, av_app, r.Link.app)
if enc == nil {
return false
}
if r.Link.protocol&RTMP_FEATURE_WRITE != 0 {
enc = C_AMF_EncodeNamedString(enc, pend, av_type, av_nonprivate)
if enc == nil {
return false
}
}
if r.Link.flashVer != "" {
enc = C_AMF_EncodeNamedString(enc, pend, av_flashVer, r.Link.flashVer)
if enc == nil {
return false
}
}
if r.Link.swfUrl != "" {
enc = C_AMF_EncodeNamedString(enc, pend, av_swfUrl, r.Link.swfUrl)
if enc == nil {
return false
}
}
if r.Link.tcUrl != "" {
enc = C_AMF_EncodeNamedString(enc, pend, av_tcUrl, r.Link.tcUrl)
if enc == nil {
return false
}
}
if r.Link.protocol&RTMP_FEATURE_WRITE == 0 {
enc = C_AMF_EncodeNamedBoolean(enc, pend, av_fpad, false)
if enc == nil {
return false
}
enc = C_AMF_EncodeNamedNumber(enc, pend, av_capabilities, 15)
if enc == nil {
return false
}
enc = C_AMF_EncodeNamedNumber(enc, pend, av_audioCodecs, float64(r.m_fAudioCodecs))
if enc == nil {
return false
}
enc = C_AMF_EncodeNamedNumber(enc, pend, av_videoCodecs, float64(r.m_fVideoCodecs))
if enc == nil {
return false
}
enc = C_AMF_EncodeNamedNumber(enc, pend, av_videoFunction, 1)
if enc == nil {
return false
}
if r.Link.pageUrl != "" {
enc = C_AMF_EncodeNamedString(enc, pend, av_pageUrl, r.Link.pageUrl)
if enc == nil {
return false
}
}
}
if r.m_fEncoding != 0.0 || r.m_bSendEncoding != 0 {
enc = C_AMF_EncodeNamedNumber(enc, pend, av_objectEncoding, float64(r.m_fEncoding))
if enc == nil {
return false
}
}
if int(uintptr(incBytePtr(unsafe.Pointer(enc), 3))) >= int(uintptr(
unsafe.Pointer(pend))) {
return false
}
(*[_Gi]byte)(unsafe.Pointer(enc))[0] = 0
enc = (*byte)(incBytePtr(unsafe.Pointer(enc), 1))
(*[_Gi]byte)(unsafe.Pointer(enc))[0] = 0
enc = (*byte)(incBytePtr(unsafe.Pointer(enc), 1))
(*[_Gi]byte)(unsafe.Pointer(enc))[0] = AMF_OBJECT_END
enc = (*byte)(incBytePtr(unsafe.Pointer(enc), 1))
/* add auth string */
if r.Link.auth != "" {
enc = C_AMF_EncodeBoolean(enc, pend, r.Link.lFlags&RTMP_LF_AUTH != 0)
if enc == nil {
return false
}
enc = C_AMF_EncodeString(enc, (*byte)(pend), r.Link.auth)
if enc == nil {
return false
}
}
if r.Link.extras.o_num != 0 {
for i := 0; i < int(r.Link.extras.o_num); i++ {
enc = C_AMF_PropEncode((*C_AMFObjectProperty)(incPtr(unsafe.Pointer(
&r.Link.extras.o_props), int(unsafe.Sizeof(r.Link.extras.o_props)), i)),
enc, pend)
if enc == nil {
return false
}
}
}
packet.m_nBodySize = uint32(uintptr(decBytePtr(unsafe.Pointer(enc),
int(uintptr(unsafe.Pointer(packet.m_body))))))
return C_RTMP_SendPacket(r, &packet, 1)
}
// int RTMP_SendCreateStream(RTMP* r);
// rtmp.c +1725
func C_RTMP_SendCreateStream(r *C_RTMP) (ok bool) {
var packet C_RTMPPacket
var pbuf [256]byte
var pend *byte = (*byte)(unsafe.Pointer(uintptr(unsafe.Pointer(&pbuf[0])) +
unsafe.Sizeof(pbuf)))
var enc *byte
packet.m_nChannel = 0x03 /* control channel (invoke) */
packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM
packet.m_packetType = RTMP_PACKET_TYPE_INVOKE
packet.m_nTimeStamp = 0
packet.m_nInfoField2 = 0
packet.m_hasAbsTimestamp = 0
packet.m_body = &pbuf[RTMP_MAX_HEADER_SIZE]
enc = (*byte)(unsafe.Pointer(packet.m_body))
enc = C_AMF_EncodeString(enc, pend, av_createStream)
r.m_numInvokes++
enc = C_AMF_EncodeNumber(enc, pend, float64(r.m_numInvokes))
*enc = AMF_NULL
enc = (*byte)(incBytePtr(unsafe.Pointer(enc), 1))
packet.m_nBodySize = uint32(uintptr(unsafe.Pointer(enc)) - uintptr(
unsafe.Pointer(packet.m_body)))
return C_RTMP_SendPacket(r, &packet, 1)
}
// int SendReleaseStream(RTMP* r);
// rtmp.c +1816
func C_SendReleaseStream(r *C_RTMP) (ok bool) {
var packet C_RTMPPacket
var pbuf [1024]byte
var pend *byte = (*byte)(unsafe.Pointer(uintptr(unsafe.Pointer(&pbuf[0])) +
unsafe.Sizeof(pbuf)))
var enc *byte
packet.m_nChannel = 0x03 /* control channel (invoke) */
packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM
packet.m_packetType = RTMP_PACKET_TYPE_INVOKE
packet.m_nTimeStamp = 0
packet.m_nInfoField2 = 0
packet.m_hasAbsTimestamp = 0
packet.m_body = &pbuf[RTMP_MAX_HEADER_SIZE]
enc = (*byte)(unsafe.Pointer(packet.m_body))
enc = C_AMF_EncodeString(enc, pend, av_releaseStream)
r.m_numInvokes++
enc = C_AMF_EncodeNumber(enc, pend, float64(r.m_numInvokes))
*enc = AMF_NULL
enc = (*byte)(incBytePtr(unsafe.Pointer(enc), 1))
enc = C_AMF_EncodeString(enc, pend, r.Link.playpath)
if enc == nil {
return false
}
packet.m_nBodySize = uint32(uintptr(unsafe.Pointer(enc)) - uintptr(
unsafe.Pointer(packet.m_body)))
return C_RTMP_SendPacket(r, &packet, 0)
}
// int SendFCPublish(RTMP* r);
// rtmp.c +1846
func C_SendFCPublish(r *C_RTMP) (ok bool) {
var packet C_RTMPPacket
var pbuf [1024]byte
var pend *byte = (*byte)(unsafe.Pointer(uintptr(unsafe.Pointer(&pbuf[0])) +
unsafe.Sizeof(pbuf)))
var enc *byte
packet.m_nChannel = 0x03 /* control channel (invoke) */
packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM
packet.m_packetType = RTMP_PACKET_TYPE_INVOKE
packet.m_nTimeStamp = 0
packet.m_nInfoField2 = 0
packet.m_hasAbsTimestamp = 0
packet.m_body = &pbuf[RTMP_MAX_HEADER_SIZE]
enc = (*byte)(unsafe.Pointer(packet.m_body))
enc = C_AMF_EncodeString(enc, pend, av_FCPublish)
r.m_numInvokes++
enc = C_AMF_EncodeNumber(enc, pend, float64(r.m_numInvokes))
*enc = AMF_NULL
enc = (*byte)(incBytePtr(unsafe.Pointer(enc), 1))
enc = C_AMF_EncodeString(enc, pend, r.Link.playpath)
if enc == nil {
return false
}
packet.m_nBodySize = uint32(uintptr(unsafe.Pointer(enc)) - uintptr(
unsafe.Pointer(packet.m_body)))
return C_RTMP_SendPacket(r, &packet, 0)
}
// int SendFCUnpublish(RTMP *r);
// rtmp.c +1875
func C_SendFCUnpublish(r *C_RTMP) (ok bool) {
var packet C_RTMPPacket
var pbuf [1024]byte
var pend *byte = (*byte)(unsafe.Pointer(uintptr(unsafe.Pointer(&pbuf[0])) +
unsafe.Sizeof(pbuf)))
var enc *byte
packet.m_nChannel = 0x03 /* control channel (invoke) */
packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM
packet.m_packetType = RTMP_PACKET_TYPE_INVOKE
packet.m_nTimeStamp = 0
packet.m_nInfoField2 = 0
packet.m_hasAbsTimestamp = 0
packet.m_body = &pbuf[RTMP_MAX_HEADER_SIZE]
enc = (*byte)(unsafe.Pointer(packet.m_body))
enc = C_AMF_EncodeString(enc, pend, av_FCUnpublish)
r.m_numInvokes++
enc = C_AMF_EncodeNumber(enc, pend, float64(r.m_numInvokes))
*enc = AMF_NULL
enc = (*byte)(incBytePtr(unsafe.Pointer(enc), 1))
enc = C_AMF_EncodeString(enc, pend, r.Link.playpath)
if enc == nil {
return false
}
packet.m_nBodySize = uint32(uintptr(unsafe.Pointer(enc)) - uintptr(
unsafe.Pointer(packet.m_body)))
return C_RTMP_SendPacket(r, &packet, 0)
}
// int SendPublish(RTMP* r);
// rtmp.c +1908
func C_SendPublish(r *C_RTMP) (ok bool) {
var packet C_RTMPPacket
var pbuf [1024]byte
var pend *byte = (*byte)(unsafe.Pointer(uintptr(unsafe.Pointer(&pbuf[0])) +
unsafe.Sizeof(pbuf)))
var enc *byte
packet.m_nChannel = 0x04 /* source channel (invoke) */
packet.m_headerType = RTMP_PACKET_SIZE_LARGE
packet.m_packetType = RTMP_PACKET_TYPE_INVOKE
packet.m_nTimeStamp = 0
packet.m_nInfoField2 = int32(r.m_stream_id)
packet.m_hasAbsTimestamp = 0
packet.m_body = &pbuf[RTMP_MAX_HEADER_SIZE]
enc = (*byte)(unsafe.Pointer(packet.m_body))
enc = C_AMF_EncodeString(enc, pend, av_publish)
r.m_numInvokes++
enc = C_AMF_EncodeNumber(enc, pend, float64(r.m_numInvokes))
*enc = AMF_NULL
enc = (*byte)(incBytePtr(unsafe.Pointer(enc), 1))
enc = C_AMF_EncodeString(enc, pend, r.Link.playpath)
if enc == nil {
return false
}
enc = C_AMF_EncodeString(enc, pend, av_live)
if enc == nil {
return false
}
packet.m_nBodySize = uint32(uintptr(unsafe.Pointer(enc)) - uintptr(
unsafe.Pointer(packet.m_body)))
return C_RTMP_SendPacket(r, &packet, 1)
}
// int
// SendDeleteStream(RTMP *r, double dStreamId)
// rtmp.c +1942
func C_SendDeleteStream(r *C_RTMP, dStreamId float64) (ok bool) {
var packet C_RTMPPacket
var pbuf [256]byte
pend := (*byte)(incBytePtr(unsafe.Pointer(&pbuf[0]), 256))
var enc *byte
packet.m_nChannel = 0x03 /* control channel (invoke) */
packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM
packet.m_packetType = RTMP_PACKET_TYPE_INVOKE
packet.m_nTimeStamp = 0
packet.m_nInfoField2 = 0
packet.m_hasAbsTimestamp = 0
packet.m_body = &pbuf[RTMP_MAX_HEADER_SIZE]
enc = (*byte)(unsafe.Pointer(packet.m_body))
enc = C_AMF_EncodeString(enc, pend, av_deleteStream)
r.m_numInvokes++
enc = C_AMF_EncodeNumber(enc, pend, float64(r.m_numInvokes))
*enc = AMF_NULL
enc = (*byte)(incBytePtr(unsafe.Pointer(enc), 1))
enc = C_AMF_EncodeNumber(enc, pend, dStreamId)
packet.m_nBodySize = uint32(uintptr(unsafe.Pointer(enc)) - uintptr(
unsafe.Pointer(packet.m_body)))
/* no response expected */
return C_RTMP_SendPacket(r, &packet, 0)
}
// int SendBytesReceived(RTMP* r);
// rtmp.c +2080
func C_SendBytesReceived(r *C_RTMP) (ok bool) {
var packet C_RTMPPacket
var pbuf [256]byte
pend := (*byte)(incBytePtr(unsafe.Pointer(&pbuf[0]), 256))
packet.m_nChannel = 0x02 /* control channel (invoke) */
packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM
packet.m_packetType = RTMP_PACKET_TYPE_BYTES_READ_REPORT
packet.m_nTimeStamp = 0
packet.m_nInfoField2 = 0
packet.m_hasAbsTimestamp = 0
packet.m_body = &pbuf[RTMP_MAX_HEADER_SIZE]
packet.m_nBodySize = 4
C_AMF_EncodeInt32((*byte)(unsafe.Pointer(packet.m_body)), pend, int32(r.m_nBytesIn))
r.m_nBytesInSent = r.m_nBytesIn
return C_RTMP_SendPacket(r, &packet, 0)
}
// int SendCheckBW(RTMP* r);
// rtmp.c +2105
func C_SendCheckBW(r *C_RTMP) (ok bool) {
var packet C_RTMPPacket
var pbuf [256]byte
var pend *byte = (*byte)(unsafe.Pointer(uintptr(unsafe.Pointer(&pbuf[0])) +
unsafe.Sizeof(pbuf)))
var enc *byte
packet.m_nChannel = 0x03 /* control channel (invoke) */
packet.m_headerType = RTMP_PACKET_SIZE_LARGE
packet.m_packetType = RTMP_PACKET_TYPE_INVOKE
packet.m_nTimeStamp = 0
packet.m_nInfoField2 = 0
packet.m_hasAbsTimestamp = 0
packet.m_body = &pbuf[RTMP_MAX_HEADER_SIZE]
enc = (*byte)(unsafe.Pointer(packet.m_body))
enc = C_AMF_EncodeString(enc, pend, av__checkbw)
r.m_numInvokes++
enc = C_AMF_EncodeNumber(enc, pend, float64(r.m_numInvokes))
*enc = AMF_NULL
enc = (*byte)(incBytePtr(unsafe.Pointer(enc), 1))
packet.m_nBodySize = uint32(uintptr(unsafe.Pointer(enc)) - uintptr(
unsafe.Pointer(packet.m_body)))
return C_RTMP_SendPacket(r, &packet, 0)
}
// void AV_erase(C_RTMP_METHOD* vals, int* num, int i, int freeit);
// rtmp.c +2393
func C_AV_erase(m []C_RTMP_METHOD, i int) []C_RTMP_METHOD {
copy(m[i:], m[i+1:])
m[len(m)-1] = C_RTMP_METHOD{}
return m[:len(m)-1]
}
// int HandleInvoke(RTMP* r, const char* body, unsigned int nBodySize);
// rtmp.c +2912
func C_HandleInvoke(r *C_RTMP, body *byte, nBodySize uint32) (ok bool) {
var obj C_AMFObject
var txn float64
var nRes int32
if *body != 0x02 {
// TODO use new logger here
//RTMP_Log(RTMP_LOGWARNING, "%s, Sanity failed. no string method in invoke packet",
//__FUNCTION__);
return false
}
nRes = C_AMF_Decode(&obj, body, int32(nBodySize), 0)
if nRes < 0 {
// TODO use new logger here
//RTMP_Log(RTMP_LOGERROR, "%s, error decoding invoke packet", __FUNCTION__);
return false
}
// NOTE we don't really need this ?? still functions without it
//C.AMF_Dump(&obj)
//C.AMFProp_GetString(C_AMF_GetProp(&obj, nil, 0), &method)
method := C_AMFProp_GetString(C_AMF_GetProp(&obj, "", 0))
txn = float64(C_AMFProp_GetNumber(C_AMF_GetProp(&obj, "", 1)))
// TODO use new logger here
// RTMP_Log(RTMP_LOGDEBUG, "%s, server invoking <%s>", __FUNCTION__, method.av_val);
switch method {
case av__result:
var methodInvoked string
for i, m := range r.m_methodCalls {
if float64(m.num) == txn {
methodInvoked = m.name
r.m_methodCalls = C_AV_erase(r.m_methodCalls, i)
break
}
}
if methodInvoked == "" {
// TODO use new logger here
//RTMP_Log(RTMP_LOGDEBUG, "%s, received result id %f without matching request",
//__FUNCTION__, txn);
goto leave
}
// TODO use new logger here
//RTMP_Log(RTMP_LOGDEBUG, "%s, received result for method call <%s>", __FUNCTION__,
//methodInvoked.av_val);
switch methodInvoked {
case av_connect:
if r.Link.token != "" {
panic("No support for link token")
}
if (r.Link.protocol & RTMP_FEATURE_WRITE) != 0 {
C_SendReleaseStream(r)
C_SendFCPublish(r)
} else {
panic("Link protocol has no RTMP_FEATURE_WRITE")
}
C_RTMP_SendCreateStream(r)
if (r.Link.protocol & RTMP_FEATURE_WRITE) == 0 {
panic("Link protocol has no RTMP_FEATURE_WRITE")
}
case av_createStream:
r.m_stream_id = int32(C_AMFProp_GetNumber(C_AMF_GetProp(&obj, "", 3)))
if r.Link.protocol&RTMP_FEATURE_WRITE != 0 {
C_SendPublish(r)
} else {
panic("Link protocol has no RTMP_FEATURE_WRITE")
}
case av_play, av_publish:
panic("Unsupported method av_play/av_publish")
}
//C.free(unsafe.Pointer(methodInvoked.av_val))
case av_onBWDone:
if r.m_nBWCheckCounter == 0 {
C_SendCheckBW(r)
}
case av_onFCUnsubscribe, av_onFCSubscribe:
panic("Unsupported method av_onFCUnsubscribe/av_onFCSubscribe")
case av_ping:
panic("Unsupported method av_ping")
case av__onbwcheck:
panic("Unsupported method av_onbwcheck")
case av__onbwdone:
panic("Unsupported method av_onbwdone")
case av_close:
panic("Unsupported method av_close")
case av_onStatus:
var obj2 C_AMFObject
C_AMFProp_GetObject(C_AMF_GetProp(&obj, "", 3), &obj2)
code := C_AMFProp_GetString(C_AMF_GetProp(&obj2, av_code, -1))
level := C_AMFProp_GetString(C_AMF_GetProp(&obj2, av_level, -1)) // Not used.
_ = level
// TODO use new logger
// RTMP_Log(RTMP_LOGDEBUG, "%s, onStatus: %s", __FUNCTION__, code.av_val);
switch code {
case av_NetStream_Failed, av_NetStream_Play_Failed,
av_NetStream_Play_StreamNotFound, av_NetConnection_Connect_InvalidApp:
panic("Unsupported method av_NetStream/av_NetStream_Play_Failed/av_netSTream_Play_StreamNotFound/av_netConnection_Connect_invalidApp")
case av_NetStream_Play_Start, av_NetStream_Play_PublishNotify:
panic("Unsupported method av_NetStream_Play_Start/av_NetStream_Play_PublishNotify")
case av_NetStream_Publish_Start:
r.m_bPlaying = true
for i, m := range r.m_methodCalls {
if m.name == av_publish {
r.m_methodCalls = C_AV_erase(r.m_methodCalls, i)
break
}
}
case av_NetStream_Play_Complete, av_NetStream_Play_Stop, av_NetStream_Play_UnpublishNotify:
panic("Unsupported method av_NetStream_Play_Complete/av_NetStream_Play_Stop/av_NetStream_Play_UnpublishNotify")
case av_NetStream_Seek_Notify:
panic("Unsupported method av_netStream_Seek_Notify")
case av_NetStream_Pause_Notify:
panic("Unsupported method av_NetStream_Pause_Notify")
}
case av_playlist_ready:
panic("Unsupported method av_playlist_ready")
default:
panic(fmt.Sprintf("unknown method: %q", method))
}
leave:
C_AMF_Reset(&obj)
// None of the methods we implement will result in a true return.
return ok
}
// void HandleChangeChunkSize(RTMP* r, const RTMPPacket* packet);
// rtmp.c +3345
func C_HandleChangeChunkSize(r *C_RTMP, packet *C_RTMPPacket) {
if packet.m_nBodySize >= 4 {
//r.m_inChunkSize = int32(C.AMF_DecodeInt32((*byte)(unsafe.Pointer(packet.m_body))))
r.m_inChunkSize = int32(C_AMF_DecodeInt32((*byte)(unsafe.Pointer(packet.m_body))))
// TODO use new logger here
// RTMP_Log(RTMP_LOGDEBUG, "%s, received: chunk size change to %d", __FUNCTION__, r.m_inChunkSize);
}
}
// void HandleServerBW(RTMP* r, const RTMPPacket* packet);
// rtmp.c +3508
func C_HandlServerBW(r *C_RTMP, packet *C_RTMPPacket) {
r.m_nServerBW = int32(C_AMF_DecodeInt32((*byte)(unsafe.Pointer(packet.m_body))))
// TODO use new logger here
// RTMP_Log(RTMP_LOGDEBUG, "%s: server BW = %d", __FUNCTION__, r.m_nServerBW);
}
// void HandleClientBW(RTMP* r, const RTMPPacket* packet);
// rtmp.c +3515
func C_HandleClientBW(r *C_RTMP, packet *C_RTMPPacket) {
r.m_nClientBW = int32(C_AMF_DecodeInt32((*byte)(unsafe.Pointer(packet.m_body))))
//r.m_nClientBW = int32(C.AMF_DecodeInt32((*byte)(unsafe.Pointer(packet.m_body))))
if packet.m_nBodySize > 4 {
r.m_nClientBW2 = (uint8)((*[_Gi]byte)(unsafe.Pointer(packet.m_body))[4])
} else {
r.m_nClientBW2 = 255
}
// TODO use new logger here
// RTMP_Log(RTMP_LOGDEBUG, "%s: client BW = %d %d", __FUNCTION__, r.m_nClientBW,
//r.m_nClientBW2);
}
// static int DecodeInt32LE(const char* data);
// rtmp.c +3527
func C_DecodeInt32LE(data *byte) int32 {
var c *uint8 = (*uint8)(data)
return int32(((*[_Gi]byte)(unsafe.Pointer(c))[3] << 24) |
((*[_Gi]byte)(unsafe.Pointer(c))[2] << 16) |
((*[_Gi]byte)(unsafe.Pointer(c))[1] << 8) |
*c)
}
// int EncodeInt32LE(char* output, int nVal);
// rtmp.c +3537
func C_EncodeInt32LE(output *byte, nVal int32) int32 {
*output = byte(nVal)
nVal >>= 8
(*[_Gi]byte)(unsafe.Pointer(output))[1] = byte(nVal)
nVal >>= 8
(*[_Gi]byte)(unsafe.Pointer(output))[2] = byte(nVal)
nVal >>= 8
(*[_Gi]byte)(unsafe.Pointer(output))[3] = byte(nVal)
return 4
}
// int RTMP_ReadPacket(RTMP* r, RTMPPacket* packet);
// rtmp.c +3550
func C_RTMP_ReadPacket(r *C_RTMP, packet *C_RTMPPacket) (ok bool) {
var hbuf [RTMP_MAX_HEADER_SIZE]uint8
memset((*byte)(&hbuf[0]), 0, RTMP_MAX_HEADER_SIZE)
var header *byte
header = (*byte)(unsafe.Pointer(&hbuf[0]))
var nSize, hSize, nToRead, nChunk int32
var extendedTimestamp int32
if C_ReadN(r, (*byte)(&hbuf[0]), 1) == 0 {
log.Println("C_RTMP_ReadPacket: failed to read RTMP packet header!")
return false
}
packet.m_headerType = uint8((hbuf[0] & 0xc0) >> 6)
packet.m_nChannel = int32(hbuf[0] & 0x3f)
header = (*byte)(incBytePtr(unsafe.Pointer(header), 1))
switch {
case packet.m_nChannel == 0:
if C_ReadN(r, (*byte)(&hbuf[1]), 1) != 1 {
log.Println("C_RTMP_ReadPacket: failed to read rtmp packet header 2nd byte.")
return false
}
packet.m_nChannel = int32(hbuf[1])
packet.m_nChannel += 64
header = (*byte)(incBytePtr(unsafe.Pointer(header), 1))
case packet.m_nChannel == 1:
var tmp int32
if C_ReadN(r, (*byte)(&hbuf[1]), 2) != 2 {
log.Println("C_RTMP_ReadPacket: failed to read RTMP packet 3rd byte")
return false
}
tmp = int32((hbuf[2] << 8) + hbuf[1])
packet.m_nChannel = int32(tmp + 64)
header = (*byte)(incBytePtr(unsafe.Pointer(header), 2))
}
nSize = int32(packetSize[packet.m_headerType])
if packet.m_nChannel >= r.m_channelsAllocatedIn {
var n int32 = int32(packet.m_nChannel + 10)
timestamp := (*int32)(C.realloc(unsafe.Pointer(r.m_channelTimestamp),
C.size_t(int32(unsafe.Sizeof(n))*n)))
var packetPtr *C_RTMPPacket
packets := (**C_RTMPPacket)(C.realloc(unsafe.Pointer(r.m_vecChannelsIn),
C.size_t(int32(unsafe.Sizeof(packetPtr))*n)))
if timestamp == nil {
//C.free(unsafe.Pointer(r.m_channelTimestamp))
}
if packets == nil {
//C.free(unsafe.Pointer(r.m_vecChannelsIn))
}
r.m_channelTimestamp = (*int32)(timestamp)
r.m_vecChannelsIn = packets
if timestamp == nil || packets == nil {
r.m_channelsAllocatedIn = 0
return false
}
memset((*byte)(incPtr(unsafe.Pointer(r.m_channelTimestamp),
int(r.m_channelsAllocatedIn), int(unsafe.Sizeof(*r.m_channelTimestamp)))),
0, int(4*int32((n-int32(r.m_channelsAllocatedIn)))))
memset((*byte)(incPtr(unsafe.Pointer(r.m_vecChannelsIn), int(
r.m_channelsAllocatedIn), int(unsafe.Sizeof(*r.m_vecChannelsIn)))), 0,
int(int32(unsafe.Sizeof(*packets))*(n-int32(r.m_channelsAllocatedIn))))
r.m_channelsAllocatedIn = int32(n)
}
switch {
case nSize == RTMP_LARGE_HEADER_SIZE:
packet.m_hasAbsTimestamp = 1
case nSize < RTMP_LARGE_HEADER_SIZE:
var tmpPacketPtr *C_RTMPPacket
if *(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsIn),
int(packet.m_nChannel), int(unsafe.Sizeof(tmpPacketPtr)))) != nil {
var tmpPacket C_RTMPPacket
memmove(unsafe.Pointer(packet), unsafe.Pointer(
*(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsIn),
int(packet.m_nChannel), int(unsafe.Sizeof(tmpPacketPtr))))),
unsafe.Sizeof(tmpPacket))
}
}
nSize--
if nSize > 0 && C_ReadN(r, header, int(nSize)) != int(nSize) {
log.Println("C_RTMP_ReadPacket: failed to read rtmp packet header.")
return false
}
hSize = int32(uintptr(incBytePtr(decBytePtr(unsafe.Pointer(header), int(uintptr(
unsafe.Pointer(&hbuf[0])))), int(nSize))))
if nSize >= 3 {
packet.m_nTimeStamp = uint32(C_AMF_DecodeInt24(header))
if nSize >= 6 {
packet.m_nBodySize = uint32(C_AMF_DecodeInt24((*byte)(incBytePtr(
unsafe.Pointer(header), 3))))
packet.m_nBytesRead = 0
if nSize > 6 {
packet.m_packetType = uint8((*[_Gi]byte)(unsafe.Pointer(header))[6])
if nSize == 11 {
// TODO: port this
packet.m_nInfoField2 = int32(C_DecodeInt32LE((*byte)(incBytePtr(
unsafe.Pointer(header), 7))))
}
}
}
}
extendedTimestamp = 0
if packet.m_nTimeStamp == 0xffffff {
extendedTimestamp = 1
}
if extendedTimestamp != 0 {
if C_ReadN(r, (*byte)(incBytePtr(unsafe.Pointer(header), int(nSize))), 4) != 4 {
log.Println("RTMPRead_Packet: Failed to read extended timestamp")
return false
}
// TODO: port this
packet.m_nTimeStamp = uint32(C_AMF_DecodeInt32((*byte)(incBytePtr(
unsafe.Pointer(header), int(nSize)))))
hSize += 4
}
if packet.m_nBodySize > 0 && packet.m_body == nil {
// TODO: port this
if !C_RTMPPacket_Alloc(packet, uint32(packet.m_nBodySize)) {
log.Println("RTMPRead_Packet: failed to allocate packet")
return false
}
packet.m_headerType = uint8((hbuf[0] & 0xc0) >> 6)
}
nToRead = int32(packet.m_nBodySize - packet.m_nBytesRead)
nChunk = int32(r.m_inChunkSize)
if nToRead < nChunk {
nChunk = nToRead
}
if packet.m_chunk != nil {
packet.m_chunk.c_headerSize = int32(hSize)
memmove(unsafe.Pointer(&packet.m_chunk.c_header[0]), unsafe.Pointer(&hbuf[0]),
uintptr(hSize))
packet.m_chunk.c_chunk = (*byte)(incBytePtr(unsafe.Pointer(packet.m_body),
int(packet.m_nBytesRead)))
packet.m_chunk.c_chunkSize = int32(nChunk)
}
if C_ReadN(r, (*byte)(incBytePtr(unsafe.Pointer(packet.m_body), int(packet.m_nBytesRead))),
int(nChunk)) != int(nChunk) {
log.Println("C_RTMP_ReadPacket: failed to read RTMP packet body")
return false
}
packet.m_nBytesRead += uint32(nChunk)
var tmpPktPtr *C_RTMPPacket
// keep the packet as ref for other packets on this channel
if *(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsIn),
int(packet.m_nChannel), int(unsafe.Sizeof(tmpPktPtr)))) == nil {
var tmpPkt C_RTMPPacket
*(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsIn), int(packet.m_nChannel),
int(unsafe.Sizeof(tmpPktPtr)))) = (*C_RTMPPacket)(malloc(uintptr(
unsafe.Sizeof(tmpPkt))))
}
memmove(unsafe.Pointer(*(**C_RTMPPacket)(incPtr(unsafe.Pointer(
r.m_vecChannelsIn), int(packet.m_nChannel), int(unsafe.Sizeof(tmpPktPtr))))),
unsafe.Pointer(packet), unsafe.Sizeof(tmpPktPtr))
if extendedTimestamp != 0 {
(*(**C_RTMPPacket)(incPtr(unsafe.Pointer(
r.m_vecChannelsIn), int(packet.m_nChannel),
int(unsafe.Sizeof(tmpPktPtr))))).m_nTimeStamp = 0xffffff
}
// TODO: port this
if C_RTMPPacket_IsReady(packet) {
if packet.m_hasAbsTimestamp == 0 {
// timestamps seem to always be relative
packet.m_nTimeStamp += *(*uint32)(incPtr(unsafe.Pointer(r.m_channelTimestamp),
int(packet.m_nChannel), 4))
}
*(*uint32)(incPtr(unsafe.Pointer(r.m_channelTimestamp), int(packet.m_nChannel),
4)) = packet.m_nTimeStamp
(*(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsIn), int(packet.m_nChannel),
int(unsafe.Sizeof(*r.m_vecChannelsIn))))).m_body = nil
(*(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsIn), int(packet.m_nChannel),
int(unsafe.Sizeof(*r.m_vecChannelsIn))))).m_nBytesRead = 0
(*(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsIn), int(packet.m_nChannel),
int(unsafe.Sizeof(*r.m_vecChannelsIn))))).m_hasAbsTimestamp = 0
} else {
packet.m_body = nil /* so it won't be erased on free */
}
return true
}
// int HandShake(RTMP* r, int FP9HandShake);
// rtmp.c +3744
func C_HandShake(r *C_RTMP, FP9HandShake int32) (ok bool) {
var uptime, suptime uint32
var typ byte
//clientbuf := make([]byte, RTMP_SIG_SIZE+1)
var clientbuf [RTMP_SIG_SIZE + 1]byte
clientsig := (*byte)(incBytePtr(unsafe.Pointer(&clientbuf[0]), 1))
//serversig := make([]byte, RTMP_SIG_SIZE)
var serversig [RTMP_SIG_SIZE]byte
clientbuf[0] = 0x03 // not encrypted
// TODO: port rtmp_getTime
uptime = inet.Htonl(uint32(C_RTMP_GetTime()))
memmove(unsafe.Pointer(clientsig), unsafe.Pointer(&uptime), 4)
memset((*byte)(sliceToPtr((*[_Gi]byte)(unsafe.Pointer(clientsig))[4:])), 0, 4)
for i := 8; i < RTMP_SIG_SIZE; i++ {
(*[_Gi]byte)(unsafe.Pointer(clientsig))[i] = byte(rand.Intn(256))
}
if !C_WriteN(r, unsafe.Pointer(&clientbuf[0]), RTMP_SIG_SIZE+1) {
return false
}
if C_ReadN(r, (*byte)(unsafe.Pointer(&typ)), 1) != 1 {
return false
}
if debugMode {
log.Printf("C_HandShake: Type answer: %v\n", typ)
}
if typ != clientbuf[0] {
log.Printf("C_HandShake: type mismatch: client sent %v, server sent: %v\n",
clientbuf[0], typ)
}
if C_ReadN(r, (*byte)(unsafe.Pointer(&serversig[0])), RTMP_SIG_SIZE) != RTMP_SIG_SIZE {
return false
}
// decode server response
memmove(unsafe.Pointer(&suptime), unsafe.Pointer(&serversig[0]), 4)
suptime = inet.Ntohl(suptime)
// 2nd part of handshake
if !C_WriteN(r, unsafe.Pointer(&serversig[0]), RTMP_SIG_SIZE) {
return false
}
if C_ReadN(r, (*byte)(unsafe.Pointer(&serversig[0])), RTMP_SIG_SIZE) != RTMP_SIG_SIZE {
return false
}
if !bytes.Equal(serversig[:RTMP_SIG_SIZE], clientbuf[1:RTMP_SIG_SIZE+1]) {
log.Printf("Client signature does not match: %q != %q",
serversig[:RTMP_SIG_SIZE], clientbuf[1:RTMP_SIG_SIZE+1])
}
return true
}
// int RTMP_SendPacket(RTMP* r, RTMPPacket* packet, int queue);
// rtmp.c +3896
func C_RTMP_SendPacket(r *C_RTMP, packet *C_RTMPPacket, queue int) (ok bool) {
var prevPacket *C_RTMPPacket
last := 0
var nSize, hSize, cSize, nChunkSize int
var header, hptr, hend, buffer, tbuf, toff unsafe.Pointer
var goHbuf [RTMP_MAX_HEADER_SIZE]byte
var hbuf = unsafe.Pointer(&goHbuf[0])
var c byte
var t uint32
var packets unsafe.Pointer
if packet.m_nChannel >= r.m_channelsAllocatedOut {
n := int(packet.m_nChannel + 10)
packets = C.realloc(unsafe.Pointer(r.m_vecChannelsOut), C.size_t(
unsafe.Sizeof(packet)*uintptr(n)))
if uintptr(packets) == uintptr(0) {
//C.free(unsafe.Pointer(r.m_vecChannelsOut))
r.m_vecChannelsOut = nil
r.m_channelsAllocatedOut = 0
return false
}
r.m_vecChannelsOut = (**C_RTMPPacket)(packets)
memset((*byte)(incPtr(unsafe.Pointer(r.m_vecChannelsOut), int(r.m_channelsAllocatedOut),
int(unsafe.Sizeof(packet)))), 0, int(unsafe.Sizeof(packet)*
uintptr(n-int(r.m_channelsAllocatedOut))))
r.m_channelsAllocatedOut = int32(n)
}
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
if prevPacket.m_nBodySize == packet.m_nBodySize &&
prevPacket.m_packetType == packet.m_packetType &&
packet.m_headerType == RTMP_PACKET_SIZE_MEDIUM {
packet.m_headerType = RTMP_PACKET_SIZE_SMALL
}
if prevPacket.m_nTimeStamp == packet.m_nTimeStamp &&
packet.m_headerType == RTMP_PACKET_SIZE_SMALL {
packet.m_headerType = RTMP_PACKET_SIZE_MINIMUM
}
last = int(prevPacket.m_nTimeStamp)
}
if packet.m_headerType > 3 {
log.Printf("Sanity failed! trying to send header of type: 0x%02x.",
packet.m_headerType)
return false
}
nSize = packetSize[int(packet.m_headerType)]
hSize = nSize
cSize = 0
t = uint32(int(packet.m_nTimeStamp) - last)
if packet.m_body != nil {
header = decBytePtr(unsafe.Pointer(packet.m_body), nSize)
hend = unsafe.Pointer(packet.m_body)
} else {
header = incBytePtr(hbuf, 6)
// TODO: be cautious about this sizeof - make sure it works how you think it
// does. C code used sizeof(hbuf) where hbuf is a *char
hend = incBytePtr(hbuf, RTMP_MAX_HEADER_SIZE)
}
switch {
case packet.m_nChannel > 319:
cSize = 2
case packet.m_nChannel > 63:
cSize = 1
}
if cSize != 0 {
header = decBytePtr(header, cSize)
hSize += cSize
}
if t >= 0xffffff {
header = decBytePtr(header, 4)
hSize += 4
log.Printf("Larger timestamp than 24-bit: 0x%v", t)
}
hptr = header
c = byte(packet.m_headerType) << 6
switch cSize {
case 0:
c |= byte(packet.m_nChannel)
case 1:
case 2:
c |= byte(1)
}
*(*byte)(hptr) = c
hptr = incBytePtr(hptr, 1)
if cSize != 0 {
tmp := packet.m_nChannel - 64
*(*byte)(hptr) = byte(tmp & 0xff)
hptr = incBytePtr(hptr, 1)
if cSize == 2 {
*(*byte)(hptr) = byte(tmp >> 8)
hptr = incBytePtr(hptr, 1)
}
}
if nSize > 1 {
res := t
if t > 0xffffff {
res = 0xffffff
}
hptr = unsafe.Pointer(C_AMF_EncodeInt24((*byte)(hptr), (*byte)(hend), int32(res)))
}
if nSize > 4 {
hptr = unsafe.Pointer(C_AMF_EncodeInt24((*byte)(hptr), (*byte)(hend), (int32(packet.m_nBodySize))))
*(*byte)(hptr) = byte(packet.m_packetType)
hptr = incBytePtr(hptr, 1)
}
if nSize > 8 {
// TODO: port this
hptr = incBytePtr(hptr, int(C_EncodeInt32LE((*byte)(hptr),
int32(packet.m_nInfoField2))))
}
if t >= 0xffffff {
hptr = unsafe.Pointer(C_AMF_EncodeInt32((*byte)(hptr), (*byte)(hend), (int32)(t)))
}
nSize = int(packet.m_nBodySize)
buffer = unsafe.Pointer(packet.m_body)
nChunkSize = int(r.m_outChunkSize)
if debugMode {
log.Printf("C_RTMP_SendPacket: fd=%v, size=%v", r.m_sb.sb_socket, nSize)
}
for (nSize + hSize) != 0 {
if nSize < nChunkSize {
nChunkSize = nSize
}
if tbuf != nil {
copy((*[_Gi]byte)(toff)[:nChunkSize+hSize], (*[_Gi]byte)(header)[:nChunkSize+hSize])
toff = incBytePtr(toff, nChunkSize+hSize)
} else {
// TODO: port this
if !C_WriteN(r, header, nChunkSize+hSize) {
return false
}
}
nSize -= nChunkSize
buffer = incBytePtr(buffer, nChunkSize)
hSize = 0
if nSize > 0 {
header = decBytePtr(buffer, 1)
hSize = 1
if cSize != 0 {
header = decBytePtr(header, cSize)
hSize += cSize
}
if t >= 0xffffff {
header = decBytePtr(header, 4)
hSize += 4
}
*(*byte)(header) = byte(0xc0 | c)
if cSize != 0 {
tmp := int(packet.m_nChannel) - 64
(*[_Gi]byte)(header)[1] = byte(tmp)
if cSize == 2 {
(*[_Gi]byte)(header)[2] = byte(tmp >> 8)
}
}
if t >= 0xffffff {
extendedTimestamp := incBytePtr(header, 1+cSize)
C_AMF_EncodeInt32((*byte)(extendedTimestamp),
(*byte)(incBytePtr(extendedTimestamp, 4)), (int32)(t))
}
}
}
if tbuf != nil {
ok := C_WriteN(r, tbuf, int(uintptr(decBytePtr(toff, int(uintptr(unsafe.Pointer(tbuf)))))))
////C.free(tbuf)
tbuf = nil
if !ok {
return false
}
}
// We invoked a remote method
// TODO: port the const
if packet.m_packetType == RTMP_PACKET_TYPE_INVOKE {
// TODO: port C_AVal
var ptr unsafe.Pointer
ptr = incBytePtr(unsafe.Pointer(packet.m_body), 1)
method := C_AMF_DecodeString((*byte)(ptr))
if debugMode {
log.Printf("invoking %v", method)
}
// keep it in call queue till result arrives
if queue != 0 {
ptr = incBytePtr(ptr, 3+len(method))
txn := int32(C_AMF_DecodeNumber((*byte)(ptr)))
r.m_methodCalls = append(r.m_methodCalls, C_RTMP_METHOD{name: method, num: txn})
}
}
if *(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsOut),
int(packet.m_nChannel), int(unsafe.Sizeof(packet)))) == nil {
*(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsOut),
int(packet.m_nChannel), int(unsafe.Sizeof(packet)))) =
(*C_RTMPPacket)(malloc(uintptr(unsafe.Sizeof(*packet))))
}
memmove(unsafe.Pointer(*(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsOut),
int(packet.m_nChannel), int(unsafe.Sizeof(packet))))), unsafe.Pointer(packet),
uintptr(unsafe.Sizeof(*packet)))
return true
}
// void RTMP_Close(RTMP *r);
// rtmp.c +4168
func C_RTMP_Close(r *C_RTMP) {
C_CloseInternal(r, 0)
}
// static void CloseInternal(RTMP *r, int reconnect);
// rtmp.c +4175
func C_CloseInternal(r *C_RTMP, reconnect int32) {
var i int32
if C_RTMP_IsConnected(r) != 0 {
if r.m_stream_id > 0 {
i = int32(r.m_stream_id)
if r.Link.protocol&RTMP_FEATURE_WRITE != 0 {
C_SendFCUnpublish(r)
}
C_SendDeleteStream(r, float64(i))
}
C_RTMPSockBuf_Close(&r.m_sb)
}
r.m_stream_id = -1
r.m_sb.sb_socket = -1
r.m_nBWCheckCounter = 0
r.m_nBytesIn = 0
r.m_nBytesInSent = 0
r.m_write.m_nBytesRead = 0
C_RTMPPacket_Free(&r.m_write)
// NOTE: C frees - not using in our case
for i := 0; i < int(r.m_channelsAllocatedIn); i++ {
if *(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsIn), i,
int(unsafe.Sizeof(&r.m_write)))) != nil {
//C.RTMPPacket_Free(*(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsIn), i,
//int(unsafe.Sizeof(&r.m_write)))))
//C.free(unsafe.Pointer(*(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsIn),
//i, int(unsafe.Sizeof(&r.m_write))))))
*(**C_RTMPPacket)(incPtr(unsafe.Pointer(r.m_vecChannelsIn),
i, int(unsafe.Sizeof(&r.m_write)))) = nil
}
}
//C.free(unsafe.Pointer(r.m_vecChannelsOut))
r.m_vecChannelsOut = nil
r.m_channelsAllocatedOut = 0
r.m_methodCalls = nil //C_AV_clear(r.m_methodCalls, r.m_numCalls)
r.m_methodCalls = r.m_methodCalls[:0]
r.m_numInvokes = 0
r.m_bPlaying = false
r.m_sb.sb_size = 0
r.m_msgCounter = 0
r.m_resplen = 0
r.m_unackd = 0
if ((r.Link.lFlags & RTMP_LF_FTCU) != 0) && (reconnect == 0) {
r.Link.app = ""
r.Link.lFlags ^= RTMP_LF_FAPU
}
if reconnect == 0 {
r.Link.playpath0 = ""
}
}
// int RTMPSockBuf_Fill(RTMPSockBuf* sb);
// rtmp.c +4253
func C_RTMPSockBuf_Fill(sb *C_RTMPSockBuf) int {
var nBytes int
if sb.sb_size == 0 {
sb.sb_start = &sb.sb_buf[0]
}
for {
nBytes = int(unsafe.Sizeof(sb.sb_buf)) - 1 - int(sb.sb_size) -
int(uintptr(unsafe.Pointer(sb.sb_start))-uintptr(unsafe.Pointer(
&sb.sb_buf[0])))
// TODO: figure out what to do with recv
nBytes = int(C.recv(C.int(sb.sb_socket), unsafe.Pointer(uintptr(unsafe.Pointer(
sb.sb_start))+uintptr(int(sb.sb_size))), C.size_t(nBytes), 0))
if nBytes != -1 {
sb.sb_size += int32(nBytes)
} else {
log.Println("C_RTMPSockBuf_Fill: recv error!")
}
break
}
return nBytes
}
// int RTMPSockBuf_Send(RTMPSockBuf* sb, const char* buf, int len);
// rtmp.c +4297
// TODO replace send with golang net connection send
func C_RTMPSockBuf_Send(sb *C_RTMPSockBuf, buf *byte, l int32) int32 {
return int32(C.send(C.int(sb.sb_socket), unsafe.Pointer(buf), C.size_t(l), 0))
}
// int
// RTMPSockBuf_Close(RTMPSockBuf *sb)
// rtmp.c +4369
func C_RTMPSockBuf_Close(sb *C_RTMPSockBuf) int32 {
if sb.sb_socket != -1 {
return int32(C.close(C.int(sb.sb_socket)))
}
return 0
}
// int RTMP_Write(RTMP* r, const char* buf, int size);
// rtmp.c +5136
func C_RTMP_Write(r *C_RTMP, buf []byte) int {
// TODO: port RTMPPacket
var pkt = &r.m_write
var pend, enc []byte
size := len(buf)
var num int
pkt.m_nChannel = 0x04
pkt.m_nInfoField2 = int32(r.m_stream_id)
for len(buf) != 0 {
if pkt.m_nBytesRead == 0 {
if size < minDataSize {
log.Printf("size: %d\n", size)
log.Printf("too small \n")
return 0
}
if buf[0] == 'F' && buf[1] == 'L' && buf[2] == 'V' {
buf = buf[13:]
}
pkt.m_packetType = uint8(buf[0])
buf = buf[1:]
pkt.m_nBodySize = uint32(C_AMF_DecodeInt24(&buf[0]))
buf = buf[3:]
pkt.m_nTimeStamp = uint32(C_AMF_DecodeInt24(&buf[0]))
buf = buf[3:]
pkt.m_nTimeStamp |= uint32(buf[0]) << 24
buf = buf[4:]
if ((pkt.m_packetType == RTMP_PACKET_TYPE_AUDIO ||
pkt.m_packetType == RTMP_PACKET_TYPE_VIDEO) &&
pkt.m_nTimeStamp == 0) || pkt.m_packetType == RTMP_PACKET_TYPE_INFO {
pkt.m_headerType = RTMP_PACKET_SIZE_LARGE
if pkt.m_packetType == RTMP_PACKET_TYPE_INFO {
pkt.m_nBodySize += 16
}
} else {
pkt.m_headerType = RTMP_PACKET_SIZE_MEDIUM
}
// TODO: Port this
if !C_RTMPPacket_Alloc(pkt, uint32(pkt.m_nBodySize)) {
log.Println("Failed to allocate packet")
return 0
}
enc = (*[_Gi]byte)(unsafe.Pointer(pkt.m_body))[:pkt.m_nBodySize]
pend = enc[pkt.m_nBodySize:]
if pkt.m_packetType == RTMP_PACKET_TYPE_INFO {
enc = (*[_Gi]byte)(unsafe.Pointer(C_AMF_EncodeString((*byte)(unsafe.Pointer(&enc[0])),
(*byte)(unsafe.Pointer(&pend[0])), setDataFrame)))[:pkt.m_nBodySize]
// TODO: work out what to do with this
pkt.m_nBytesRead = uint32(float64(uintptr(unsafe.Pointer(&enc[0])) -
uintptr(unsafe.Pointer(pkt.m_body))))
}
} else {
enc = ((*[_Gi]byte)(unsafe.Pointer(pkt.m_body))[:pkt.m_nBodySize])[pkt.m_nBytesRead:]
}
num = int(pkt.m_nBodySize - pkt.m_nBytesRead)
if num > len(buf) {
num = len(buf)
}
copy(enc[:num], buf[:num])
pkt.m_nBytesRead += uint32(num)
buf = buf[num:]
if pkt.m_nBytesRead == pkt.m_nBodySize {
// TODO: Port this
ok := C_RTMP_SendPacket(r, pkt, 0)
// TODO: Port this
C_RTMPPacket_Free(pkt)
pkt.m_nBytesRead = 0
if !ok {
return -1
}
if len(buf) < 4 {
return size + (len(buf) - 4)
}
buf = buf[4:]
}
}
return size
}
func memmove(to, from unsafe.Pointer, n uintptr) {
if to != nil && from != nil && n != 0 {
copy((*[_Gi]byte)(to)[:n], (*[_Gi]byte)(from)[:n])
}
}
// TODO: write test for this func
func memcmp(a, b unsafe.Pointer, size int) int {
for i := 0; i < size; i++ {
aValue := (*[_Gi]byte)(a)[i]
bValue := (*[_Gi]byte)(b)[i]
if aValue != bValue {
if aValue < bValue {
return -1
} else {
return 1
}
}
}
return 0
}
func memset(ptr *byte, val byte, num int) {
for i := 0; i < num; i++ {
(*[_Gi]byte)(unsafe.Pointer(ptr))[i] = val
}
}
func strLen(str string) int {
return len(str)
}
// wrapper for converting byte pointer to unsafe.Pointer
func bToUP(b *byte) unsafe.Pointer {
return unsafe.Pointer(b)
}
// Creates a new C style string from a go string
func goStrToCStr(str string) *byte {
l := len(str)
slice := make([]byte, l+1)
ptr := unsafe.Pointer(&[]byte(str)[0])
for i := 0; i < l; i++ {
slice[i] = (*[_Gi]byte)(ptr)[i]
}
slice[l] = '\x00'
return &slice[0]
}
// TODO: need a test in rtmp_test.go
func cStrToGoStr(cStr *byte) string {
return string((*[_Gi]byte)(unsafe.Pointer(cStr))[:strlen(cStr)])
}
// Duplicates a string given as a byte pointer
func strdup(str *byte) *byte {
length := strlen(str)
newMem := make([]byte, length+1)
oldMem := (*[_Gi]byte)(unsafe.Pointer(str))[:length+1]
copy(newMem, oldMem)
return &newMem[0]
}
// Gets the length of the string found at str - length is number of chars
// between start and terminating null char. Returns -1 if a null char is not
// found before a count of 1000
func strlen(str *byte) int32 {
for i := 0; i < 1000; i++ {
if (*[_Gi]byte)(unsafe.Pointer(str))[i] == '\000' {
return int32(i)
}
}
return int32(-1)
}
// Returns the pointer where the first occurance of val is located in a string
// which is terminated by a null char. Returns nil if null char is not found
// before a count of 10000
func strchr(str *byte, val byte) *byte {
for i := 0; i < 1000; i++ {
if (*[_Gi]byte)(unsafe.Pointer(str))[i] == val {
return &(*[_Gi]byte)(unsafe.Pointer(str))[i]
}
if (*[_Gi]byte)(unsafe.Pointer(str))[i] == '\000' {
break
}
}
return nil
}
// TODO: need a test in rtmp_test.go
// Porting: http://www.ai.mit.edu/projects/im/cam8/cam8/working/CAMlib/tcl/compat/strstr.c
func strstr(str *byte, substring *byte) *byte {
var a, b *byte
/* First scan quickly through the two strings looking for a
* single-character match. When it's found, then compare the
* rest of the substring.
*/
b = substring
if *b == 0 {
return str
}
for *str != 0 {
str = (*byte)(incBytePtr(unsafe.Pointer(str), 1))
if *str != *b {
continue
}
a = str
for {
if *b == 0 {
return str
}
tmp1 := a
a = (*byte)(incBytePtr(unsafe.Pointer(a), 1))
tmp2 := b
b = (*byte)(incBytePtr(unsafe.Pointer(b), 1))
if *tmp1 != *tmp2 {
break
}
}
b = substring
}
return nil
}
// Creates mem of the size noOfBytes. returns as unsafe pointer
func malloc(nOfBytes uintptr) unsafe.Pointer {
mem := make([]byte, int(nOfBytes))
return unsafe.Pointer(&mem[0])
}
func calloc(val byte, noOfBytes uintptr) unsafe.Pointer {
mem := malloc(noOfBytes)
memset((*byte)(mem), val, int(noOfBytes))
return mem
}
// 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, 1)
}
// incPtr attempts to replicate C like pointer arithmatic functionality
func incPtr(ptr unsafe.Pointer, inc, typeSize int) unsafe.Pointer {
return unsafe.Pointer(uintptr(ptr) + uintptr(inc*typeSize))
}
// incPtr attempts to replicate C like pointer arithmatic functionality
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, 1)
}
// sliceToPtr get's the address of the first data element and returns as unsafe
// pointer
func sliceToPtr(data []byte) unsafe.Pointer {
if len(data) == 0 {
return nil
}
return unsafe.Pointer(&data[0])
}
var rtmpErrs = [...]string{
1: "rtmp: not connected",
2: "rtmp: write error",
3: "rtmp: not started",
}
type Err uint
func (e Err) Error() string {
if 0 <= int(e) && int(e) < len(rtmpErrs) {
s := rtmpErrs[e]
if s != "" {
return s
}
}
return "rtmp: " + strconv.Itoa(int(e))
}
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