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/*
NAME
rtmp.go
DESCRIPTION
See Readme.md
AUTHOR
Saxon Nelson-Milton <saxon@ausocean.org>
Dan Kortschak <dan@ausocean.org>
Jake Lane <jake@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.
*/
package rtmp
/*
#cgo CFLAGS: -I/usr/local/include/librtmp
#cgo LDFLAGS: -L/usr/local/lib -lrtmp
#include <stdlib.h>
#include <string.h>
#include <rtmp.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
typedef enum {
RTMPT_OPEN=0, RTMPT_SEND, RTMPT_IDLE, RTMPT_CLOSE
} RTMPTCmd;
typedef struct sockaddr_in sockaddr_in;
typedef struct sockaddr sockaddr;
int add_addr_info(struct sockaddr_in *service, AVal *host, int port);
RTMP* start_session(RTMP* rtmp, char* url, uint connect_timeout);
int write_frame(RTMP* rtmp, char* data, uint data_length);
int end_session(RTMP* rtmp);
void AV_queue(RTMP_METHOD **vals, int *num, AVal *av, int txn);
int C_WriteN(RTMP *r, const char *buffer, int n);
int EncodeInt32LE(char *output, int nVal);
int HTTP_Post(RTMP *r, RTMPTCmd cmd, const char *buf, int len);
*/
import "C"
import (
"errors"
"fmt"
"log"
"math"
"math/rand"
"reflect"
"strconv"
"unsafe"
"github.com/chamaken/cgolmnl/inet"
)
const (
RTMPT_OPEN = iota
RTMPT_SEND
RTMPT_IDLE
RTMPT_CLOSE
)
// typedef enum
// amf.h +40
type C_AMFDataType int32
const (
AMF_NUMBER = iota
AMF_BOOLEAN
AMF_STRING
AMF_OBJECT
AMF_MOVIECLIP /* reserved, not used */
AMF_NULL
AMF_UNDEFINED
AMF_REFERENCE
AMF_ECMA_ARRAY
AMF_OBJECT_END
AMF_STRICT_ARRAY
AMF_DATE
AMF_LONG_STRING
AMF_UNSUPPORTED
AMF_RECORDSET /* reserved, not used */
AMF_XML_DOC
AMF_TYPED_OBJECT
AMF_AVMPLUS /* switch to AMF3 */
AMF_INVALID = 0xff
)
const (
RTMP_PACKET_TYPE_CHUNK_SIZE = 0x01
RTMP_PACKET_TYPE_BYTES_READ_REPORT = 0x03
RTMP_PACKET_TYPE_CONTROL = 0x04
RTMP_PACKET_TYPE_SERVER_BW = 0x05
RTMP_PACKET_TYPE_CLIENT_BW = 0x06
RTMP_PACKET_TYPE_AUDIO = 0x08
RTMP_PACKET_TYPE_VIDEO = 0x09
RTMP_PACKET_TYPE_FLEX_STREAM_SEND = 0x0F
RTMP_PACKET_TYPE_FLEX_SHARED_OBJECT = 0x10
RTMP_PACKET_TYPE_FLEX_MESSAGE = 0x11
RTMP_PACKET_TYPE_INFO = 0x12
RTMP_PACKET_TYPE_SHARED_OBJECT = 0x13
RTMP_PACKET_TYPE_INVOKE = 0x14
RTMP_PACKET_TYPE_FLASH_VIDEO = 0x16
)
const (
RTMP_PACKET_SIZE_LARGE = 0
RTMP_PACKET_SIZE_MEDIUM = 1
RTMP_PACKET_SIZE_SMALL = 2
RTMP_PACKET_SIZE_MINIMUM = 3
)
const (
RTMP_READ_HEADER = 0x01
RTMP_READ_RESUME = 0x02
RTMP_READ_NO_IGNORE = 0x04
RTMP_READ_GOTKF = 0x08
RTMP_READ_GOTFLVK = 0x10
RTMP_READ_SEEKING = 0x20
RTMP_READ_COMPLETE = -3
RTMP_READ_ERROR = -2
RTMP_READ_EOF = -1
RTMP_READ_IGNORE = 0
)
const (
RTMP_LF_AUTH = 0x0001 /* using auth param */
RTMP_LF_LIVE = 0x0002 /* stream is live */
RTMP_LF_SWFV = 0x0004 /* do SWF verification */
RTMP_LF_PLST = 0x0008 /* send playlist before play */
RTMP_LF_BUFX = 0x0010 /* toggle stream on BufferEmpty msg */
RTMP_LF_FTCU = 0x0020 /* free tcUrl on close */
RTMP_LF_FAPU = 0x0040 /* free app on close */
)
const (
RTMP_FEATURE_HTTP = 0x01
RTMP_FEATURE_ENC = 0x02
RTMP_FEATURE_SSL = 0x04
RTMP_FEATURE_MFP = 0x08 /* not yet supported */
RTMP_FEATURE_WRITE = 0x10 /* publish, not play */
RTMP_FEATURE_HTTP2 = 0x20 /* server-side rtmpt */
)
const (
RTMP_PROTOCOL_UNDEFINED = -1
RTMP_PROTOCOL_RTMP = 0
RTMP_PROTOCOL_RTMPE = RTMP_FEATURE_ENC
RTMP_PROTOCOL_RTMPT = RTMP_FEATURE_HTTP
RTMP_PROTOCOL_RTMPS = RTMP_FEATURE_SSL
RTMP_PROTOCOL_RTMPTE = (RTMP_FEATURE_HTTP | RTMP_FEATURE_ENC)
RTMP_PROTOCOL_RTMPTS = (RTMP_FEATURE_HTTP | RTMP_FEATURE_SSL)
RTMP_PROTOCOL_RTMFP = RTMP_FEATURE_MFP
)
const (
RTMP_DEFAULT_CHUNKSIZE = 128
RTMP_BUFFER_CACHE_SIZE = (16 * 1024)
RTMP_CHANNELS = 65600
RTMP_SWF_HASHLEN = 32
RTMP_SIG_SIZE = 1536
RTMP_LARGE_HEADER_SIZE = 12
RTMP_MAX_HEADER_SIZE = 18
)
const (
minDataSize = 11
debugMode = false
)
// av_setDataFrame is a static const global in rtmp.c
var (
setDataFrame = AVC("@setDataFrame")
av_connect = AVC("connect")
av_app = AVC("app")
av_type = AVC("type")
av_nonprivate = AVC("nonprivate")
av_flashVer = AVC("flashVer")
av_swfUrl = AVC("swfUrl")
av_tcUrl = AVC("tcUrl")
av_fpad = AVC("fpad")
av_capabilities = AVC("capabilities")
av_audioCodecs = AVC("audioCodecs")
av_videoCodecs = AVC("videoCodecs")
av_videoFunction = AVC("videoFunction")
av_pageUrl = AVC("pageUrl")
av_objectEncoding = AVC("objectEncoding")
)
var packetSize = [...]int{12, 8, 4, 1}
var RTMPProtocolStringsLower = [...]string{
"rtmp",
"rtmpt",
"rtmpe",
"rtmpte",
"rtmps",
"rtmpts",
"",
"",
"rtmfp",
}
type Session interface {
Open() error
Write([]byte) (int, error)
Close() error
}
// session provides parameters required for an rtmp communication session.
type session struct {
rtmp *C.RTMP
url string
timeout uint
}
// typedef struct RTMP
// rtmp.h +237
type C_RTMP struct {
m_inChunkSize int32
m_outChunkSize int32
m_nBWCheckCounter int32
m_nBytesIn int32
m_nBytesInSent int32
m_nBufferMS int32
m_stream_id int32
m_mediaChannel int32
m_mediaStamp uint32
m_pauseStamp uint32
m_pausing int32
m_nServerBw int32
m_nClientBw int32
m_nClientBw2 uint8
m_bPlaying uint8
m_bSendEncoding uint8
m_bSendCounter uint8
m_numInvokes int32
m_numCalls int32
m_methodCalls *C_RTMP_METHOD
m_channelsAllocatedIn int32
m_channelsAllocatedOut int32
m_vecChannelsIn **C_RTMPPacket
m_vecChannelsOut **C_RTMPPacket
m_channelTimestamp *int32
m_fAudioCodecs float64
m_fVideoCodecs float64
m_fEncoding float64
m_fDuration float64
m_msgCounter int32
m_polling int32
m_resplen int32
m_unackd int32
m_clientID C_AVal
m_read C_RTMP_READ
m_write C_RTMPPacket
m_sb C_RTMPSockBuf
Link C_RTMP_LNK
}
// typedef struct RTMPPacket
// rtmp.h +113
type C_RTMPPacket struct {
m_headerType uint8
m_packetType uint8
m_hasAbsTimestamp uint8
m_nChannel int32
m_nTimeStamp uint32
m_nInfoField2 int32
m_nBodySize uint32
m_nBytesRead uint32
m_chunk *C_RTMPChunk
m_body *byte
}
// typedef struct RTMPMethod
// rtmp.h +231
type C_RTMP_METHOD struct {
name C_AVal
num int32
}
// typedef struct C.AVal
// amf.h +57
type C_AVal struct {
av_val *byte
av_len int32
}
// typedef struct RTMP_READ
// rtmp.h +200
type C_RTMP_READ struct {
buf *byte
bufpos *byte
buflen uint
timestamp uint32
dataType uint8
flags uint8
status int8
initialFrameType uint8
nResumeTS uint32
metaHeader *byte
initialFrame *byte
nMetaHeaderSize uint32
nInitialFrameSize uint32
nIgnoredFrameCounter uint32
nIgnoredFlvFrameCounter uint32
}
// typedef struct RTMP_READ
// rtmp.h +200
type C_RTMPSockBuf struct {
sb_socket int32
sb_size int32
sb_start *byte
sb_buf [RTMP_BUFFER_CACHE_SIZE]byte // port const
sb_timedout int32
sb_ssl uintptr
}
// typedef struct RTMPChunk
// rtmp.h +105
type C_RTMPChunk struct {
c_headerSize int32
c_chunkSize int32
c_chunk *byte
c_header [RTMP_MAX_HEADER_SIZE]byte
}
// typedef struct RTMP_LNK
// rtmp.h +144
type C_RTMP_LNK struct {
hostname C_AVal
sockshost C_AVal
playpath0 C_AVal
playpath C_AVal
tcUrl C_AVal
swfUrl C_AVal
pageUrl C_AVal
app C_AVal
auth C_AVal
flashVer C_AVal
subscribepath C_AVal
usherToken C_AVal
token C_AVal
pubUser C_AVal
pubPasswd C_AVal
extras C_AMFObject
edepth int32
seekTime int32
stopTime int32
lFlags int32
swfAge int32
protocol int32
timeout int32
pFlags int32
socksport uint16
port uint16
}
// typedef struct AMF_Object
// amf.h +67
type C_AMFObject struct {
o_num int32
o_props *C_AMFObjectProperty
}
// typedef struct AMFObjectProperty
// amf.h +79
type C_AMFObjectProperty struct {
p_name C_AVal
p_type C_AMFDataType
p_vu P_vu
p_UTCoffset int16
}
// typedef struct P_vu
// amf.h +73
type P_vu struct {
p_number float32
p_aval C_AVal
p_object C_AMFObject
}
// NewSession returns a new session.
func NewSession(url string, connectTimeout uint) Session {
return &session{
url: url,
timeout: connectTimeout,
}
}
// Open establishes an rtmp connection with the url passed into the
// constructor
func (s *session) Open() error {
if s.rtmp != nil {
return errors.New("rtmp: attempt to start already running session")
}
var err error
s.rtmp, err = startSession(s.rtmp, s.url, uint32(s.timeout))
if s.rtmp == nil {
return err
}
return nil
}
// Close terminates the rtmp connection
func (s *session) Close() error {
if s.rtmp == nil {
return Err(3)
}
ret := endSession(s.rtmp)
s.rtmp = nil
if ret != 0 {
return Err(ret)
}
return nil
}
// Write writes a frame (flv tag) to the rtmp connection
func (s *session) Write(data []byte) (int, error) {
if s.rtmp == nil {
return 0, Err(3)
}
if C_RTMP_IsConnected(s.rtmp) == 0 {
//if C.RTMP_IsConnected(s.rtmp) == 0 {
return 0, Err(1)
}
if C_RTMP_Write(s.rtmp, data) == 0 {
//if C.RTMP_Write(s.rtmp, (*C.char)(unsafe.Pointer(&data[0])), C.int(len(data))) == 0 {
return 0, Err(2)
}
return len(data), nil
}
// 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
}
func startSession(rtmp *C.RTMP, u string, timeout uint32) (*C.RTMP, error) {
connect_timeout := C.int(timeout)
rtmp = C_RTMP_Alloc()
//rtmp = C.RTMP_Alloc()
C_RTMP_Init(rtmp)
//C.RTMP_Init(rtmp)
rtmp.Link.timeout = connect_timeout
if C_RTMP_SetupURL(rtmp, u) == 0 {
// if C.RTMP_SetupURL(rtmp, C.CString(u)) == 0 {
//C.RTMP_Close(rtmp)
//C.RTMP_Free(rtmp)
return nil, errors.New("rtmp startSession: Failed to setup URL!")
}
C_RTMP_EnableWrite(rtmp)
//C.RTMP_EnableWrite(rtmp)
C_RTMP_SetBufferMS(rtmp, 3600*1000)
//C.RTMP_SetBufferMS(rtmp, 3600*1000)
if C_RTMP_Connect(rtmp, nil) == 0 {
//if C.RTMP_Connect(rtmp, nil) == 0 {
//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) == 0 {
//if C.RTMP_ConnectStream(rtmp, 0) == 0 {
//C.RTMP_Close(rtmp)
//C.RTMP_Free(rtmp)
return nil, errors.New("rtmp startSession: Failed to connect stream!")
}
return rtmp, nil
}
// RTMP* RTMP_IsConnected();
// rtmp.c +317
func C_RTMP_Alloc() *C.RTMP {
var r C.RTMP
//return (*C.RTMP)(C.malloc(C.size_t(unsafe.Sizeof(r))))
return (*C.RTMP)(allocate(unsafe.Sizeof(r)))
}
// void RTMP_Init(RTMP *r);
// rtmp.c +329
func C_RTMP_Init(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
}
// 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, u string) int32 {
url := goStrToCStr(u)
var ret, length int32
var port uint32
port = 0
length = strlen(url)
// TODO: port this
ret = int32(C.RTMP_ParseURL((*C.char)(unsafe.Pointer(url)), &r.Link.protocol, &r.Link.hostname,
(*C.uint)(&port), &r.Link.playpath0, &r.Link.app))
if ret == 0 {
return ret
}
r.Link.port = C.ushort(port)
r.Link.playpath = r.Link.playpath0
if r.Link.tcUrl.av_len == 0 {
r.Link.tcUrl.av_val = (*C.char)(unsafe.Pointer(url))
if r.Link.app.av_len != 0 {
if int(uintptr(unsafe.Pointer(r.Link.app.av_val))) <
int(uintptr(incBytePtr(unsafe.Pointer(url), int(length)))) {
r.Link.tcUrl.av_len = C.int(int(r.Link.app.av_len) +
int(uintptr(decBytePtr(unsafe.Pointer(r.Link.app.av_val),
int(uintptr(unsafe.Pointer(url)))))))
} else {
length = int32(r.Link.hostname.av_len) + int32(r.Link.app.av_len) +
int32(len("rtmpte://:65535/\x00"))
r.Link.tcUrl.av_val = (*C.char)(allocate(uintptr(length)))
hostname := string(ptrToSlice(unsafe.Pointer(r.Link.hostname.av_val),
int(r.Link.hostname.av_len)))
app := string(ptrToSlice(unsafe.Pointer(r.Link.app.av_val),
int(r.Link.app.av_len)))
fString := fmt.Sprintf("%v://%v:%v/%v",
RTMPProtocolStringsLower[r.Link.protocol], hostname, r.Link.port, app)
r.Link.tcUrl.av_val = (*C.char)(bToUP(goStrToCStr(fString)))
r.Link.tcUrl.av_len = C.int(strLen(RTMPProtocolStringsLower[r.Link.protocol]) +
strLen(string("://")) + strLen(hostname) + strLen(string(":")) +
strLen(strconv.Itoa(int(r.Link.port))) + strLen(string("/")) + strLen(app))
r.Link.lFlags |= RTMP_LF_FTCU
}
} else {
r.Link.tcUrl.av_len = C.int(strlen(url))
}
}
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 1
}
// void SocksSetup(RTMP *r, C.AVal* sockshost);
// rtmp.c +410
func C_SocksSetup(r *C.RTMP, sockshost *C.AVal) {
if sockshost.av_len != 0 {
socksport := strchr((*byte)(unsafe.Pointer(sockshost.av_val)), ':')
hostname := strdup((*byte)(unsafe.Pointer(sockshost.av_val)))
if unsafe.Pointer(socksport) != nil {
*indxBytePtr(unsafe.Pointer(hostname),
int(uintptr(decBytePtr(unsafe.Pointer(socksport),
int(uintptr(unsafe.Pointer(sockshost.av_val))))))) = '\000'
r.Link.sockshost.av_val = (*C.char)(unsafe.Pointer(hostname))
r.Link.sockshost.av_len = C.int(strlen(hostname))
value, err := strconv.Atoi(string(ptrToSlice(unsafe.Pointer(uintptr(
unsafe.Pointer(socksport))+uintptr(1)), int(strlen((*byte)(unsafe.Pointer(
uintptr(unsafe.Pointer(socksport))+uintptr(1)))))+1)))
if err != nil {
log.Println("C_SocksSetup: bad string conversion!")
}
if uintptr(unsafe.Pointer(socksport)) == 0 {
value = 1080
}
r.Link.socksport = C.ushort(value)
}
} else {
r.Link.sockshost.av_val = nil
r.Link.sockshost.av_len = 0
r.Link.socksport = 0
}
}
/*
func rtmpClose(r *C.RTMP) {
closeInternal(r, 0)
}
func 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, C.double(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
if r.m_read.flags&RTMP_READ_HEADER != 0 {
C.free(unsafe.Pointer(r.m_read.buf))
r.m_read.buf = nil
}
r.m_read.dataType = 0
r.m_read.flags = 0
r.m_read.status = 0
r.m_read.nResumeTS = 0
r.m_read.nIgnoredFrameCounter = 0
r.m_read.nIgnoredFlvFrameCounter = 0
r.m_write.m_nBytesRead = 0
C.RTMPPacket_Free(&r.m_write)
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
C.AV_clear(r.m_methodCalls, r.m_numCalls)
r.m_methodCalls = nil
r.m_numCalls = 0
r.m_numInvokes = 0
r.m_bPlaying = C.uchar(0)
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) {
C.free(unsafe.Pointer(r.Link.app.av_val))
r.Link.app.av_val = nil
r.Link.lFlags ^= RTMP_LF_FAPU
}
if reconnect == 0 {
C.free(unsafe.Pointer(r.Link.playpath0.av_val))
r.Link.playpath0.av_val = nil
}
}
*/
// void RTMP_EnableWrite(RTMP *r);
// rtmp.c +351
func C_RTMP_EnableWrite(r *C.RTMP) {
r.Link.protocol |= RTMP_FEATURE_WRITE
}
// void RTMP_SetBufferMS(RTMP *r, int size);
// rtmp.c +381
func C_RTMP_SetBufferMS(r *C.RTMP, size int32) {
r.m_nBufferMS = C.int(size)
}
// int RTMP_Connect(RTMP *r, RTMPPacket* cp);
// rtmp.c +1032
func C_RTMP_Connect(r *C.RTMP, cp *C.RTMPPacket) int {
// TODO: port this
var service C.sockaddr_in
if r.Link.hostname.av_len == 0 {
return 0
}
memset((*byte)(unsafe.Pointer(&service)), 0, int(unsafe.Sizeof(service)))
// TODO: port this
service.sin_family = C.AF_INET
if r.Link.socksport != 0 {
// TODO: port this
if C.add_addr_info(&service, &r.Link.sockshost, C.int(r.Link.socksport)) == 0 {
return 0
}
} else {
// connect directly
if C.add_addr_info(&service, (*C.AVal)(unsafe.Pointer(&r.Link.hostname)),
C.int(r.Link.port)) == 0 {
return 0
}
}
//if C.RTMP_Connect0(r, (*C.sockaddr)(unsafe.Pointer(&service))) == 0 {
if C_RTMP_Connect0(r, (*C.sockaddr)(unsafe.Pointer(&service))) == 0 {
return 0
}
r.m_bSendCounter = 1
return int(C_RTMP_Connect1(r, cp))
//return int(C.RTMP_Connect1(r, cp))
}
// int RTMP_Connect0(RTMP *r, struct sockaddr* service);
// rtmp.c +906
func C_RTMP_Connect0(r *C.RTMP, service *C.sockaddr) int {
on := 1
r.m_sb.sb_timedout = 0
r.m_pausing = 0
r.m_fDuration = 0
r.m_sb.sb_socket = C.socket(C.AF_INET, C.SOCK_STREAM, C.IPPROTO_TCP)
if r.m_sb.sb_socket != -1 {
if C.connect(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) == 0 {
log.Println("C_RTMP_Connect0: SOCKS negotiation failed.")
return 0
}
}
} else {
log.Println("C_RTMP_Connect0: failed to create socket.")
return 0
}
{
var tv int32
SET_RCVTIMEO(&tv, int32(r.Link.timeout))
// tv := C.int(r.Link.timeout * 1000)
if C.setsockopt(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(r.m_sb.sb_socket, C.IPPROTO_TCP, C.TCP_NODELAY,
unsafe.Pointer(&on), C.socklen_t(unsafe.Sizeof(on)))
return 1
}
func SET_RCVTIMEO(tv *int32, s int32) {
*tv = s * 1000
}
// int RTMP_Connect1(RTMP* r, RTMPPacket* cp);
// rtmp.c +978
func C_RTMP_Connect1(r *C.RTMP, cp *C.RTMPPacket) int {
if debugMode {
log.Println("... connected, handshaking...")
}
//if C.HandShake(r, 1) == 0 {
if C_HandShake(r, 1) == 0 {
log.Println("C_RTMP_Connect1: handshake failed!")
return 0
}
if debugMode {
log.Println("... handshaked...")
}
//if C.SendConnectPacket(r, cp) == 0 {
if C_SendConnectPacket(r, cp) == 0 {
log.Println("RTMP connect failed!")
return 0
}
return 1
}
// int HandShake(RTMP* r, int FP9HandShake);
// rtmp.c +3744
func C_HandShake(r *C.RTMP, FP9HandShake int32) int {
var bMatch int
//uptime := uint32(0)
//suptime := uint32(0)
//typ := byte(0)
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(indxBytePtr(unsafe.Pointer(clientsig), 4), 0, 4)
for i := 8; i < RTMP_SIG_SIZE; i++ {
*indxBytePtr(unsafe.Pointer(clientsig), i) = byte(rand.Intn(256))
}
if C_WriteN(r, unsafe.Pointer(&clientbuf[0]), RTMP_SIG_SIZE+1) == 0 {
return 0
}
//if C.ReadN(r, (*C.char)(unsafe.Pointer(&typ)), 1) != 1 {
if C_ReadN(r, (*byte)(unsafe.Pointer(&typ)), 1) != 1 {
return 0
}
if debugMode {
log.Println("C_HandShake: Type answer: %v", typ)
}
if typ != clientbuf[0] {
log.Println("C_HandShake: type mismatch: client sent %v, server sent: %v",
clientbuf[0], typ)
}
if C_ReadN(r, (*byte)(unsafe.Pointer(&serversig[0])), RTMP_SIG_SIZE) != RTMP_SIG_SIZE {
//if C.ReadN(r, (*C.char)(unsafe.Pointer(&serversig[0])), RTMP_SIG_SIZE) != RTMP_SIG_SIZE {
return 0
}
// 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) == 0 {
return 0
}
if C_ReadN(r, (*byte)(unsafe.Pointer(&serversig[0])), RTMP_SIG_SIZE) != RTMP_SIG_SIZE {
//if C.ReadN(r, (*C.char)(unsafe.Pointer(&serversig[0])), RTMP_SIG_SIZE) != RTMP_SIG_SIZE {
return 0
}
// TODO: find golang memcmp
bMatch = 0
if memcmp(unsafe.Pointer(&serversig[0]), unsafe.Pointer(clientsig),
RTMP_SIG_SIZE) == 0 {
bMatch = 1
}
if bMatch == 0 {
log.Println("Client signature does not match!")
}
return 1
}
// 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 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 = (*C.char)(incBytePtr(unsafe.Pointer(r.m_sb.sb_start),
nRead))
r.m_sb.sb_size -= C.int(nRead)
nBytes = nRead
r.m_nBytesIn += C.int(nRead)
if r.m_bSendCounter != 0 && r.m_nBytesIn > (r.m_nBytesInSent+
r.m_nClientBW/10) {
//if C.SendBytesReceived(r) == 0 {
if C_SendBytesReceived(r) == 0 {
return 0
}
}
}
if nBytes == 0 {
log.Println("RTMP socket closed by peer")
// RTMP_Close(r)
break
}
n -= nBytes
ptr = (*byte)(incBytePtr(unsafe.Pointer(ptr), nBytes))
}
return nOriginalSize - n
}
// 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(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 += C.int(nBytes)
} else {
log.Println("C_RTMPSockBuf_Fill: recv error!")
}
break
}
return nBytes
}
// int SendBytesReceived(RTMP* r);
// rtmp.c +2080
func C_SendBytesReceived(r *C.RTMP) int {
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 = (*C.char)(incBytePtr(unsafe.Pointer(&pbuf[0]),
RTMP_MAX_HEADER_SIZE))
packet.m_nBodySize = 4
C_AMF_EncodeInt32((*byte)(unsafe.Pointer(packet.m_body)), pend, int32(r.m_nBytesIn))
// C.AMF_EncodeInt32(packet.m_body, (*C.char)(unsafe.Pointer(pend)), r.m_nBytesIn)
r.m_nBytesInSent = r.m_nBytesIn
//return int(C.RTMP_SendPacket(r, &packet, 0))
return C_RTMP_SendPacket(r, &packet, 0)
}
// int SendConnectPacket(RTMP* r, RTMPPacket* cp);
// rtmp.c +1579
func C_SendConnectPacket(r *C.RTMP, cp *C.RTMPPacket) int {
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)
//return int(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 = (*C.char)(incBytePtr(unsafe.Pointer(&pbuf[0]),
RTMP_MAX_HEADER_SIZE))
enc = (*byte)(unsafe.Pointer(packet.m_body))
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeString((*C.char)(unsafe.Pointer(enc)),
//(*C.char)(unsafe.Pointer(pend)), &av_connect)))
enc = C_AMF_EncodeString(enc, pend, &av_connect)
r.m_numInvokes += 1
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeNumber((*C.char)(unsafe.Pointer(enc)),
//(*C.char)(unsafe.Pointer(pend)), C.double(r.m_numInvokes))))
enc = C_AMF_EncodeNumber(enc, pend, float64(r.m_numInvokes))
*indxBytePtr(unsafe.Pointer(enc), 0) = AMF_OBJECT
enc = (*byte)(unsafe.Pointer(incBytePtr(unsafe.Pointer(enc), 1)))
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeNamedString((*C.char)(
//unsafe.Pointer(enc)), (*C.char)(unsafe.Pointer(pend)), &av_app, &r.Link.app)))
enc = C_AMF_EncodeNamedString(enc, pend, &av_app, &r.Link.app)
if enc == nil {
return 0
}
if r.Link.protocol&RTMP_FEATURE_WRITE != 0 {
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeNamedString((*C.char)(
//unsafe.Pointer(enc)), (*C.char)(unsafe.Pointer(pend)), &av_type, &av_nonprivate)))
enc = C_AMF_EncodeNamedString(enc, pend, &av_type, &av_nonprivate)
if enc == nil {
return 0
}
}
if r.Link.flashVer.av_len != 0 {
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeNamedString((*C.char)(
//unsafe.Pointer(enc)), (*C.char)(unsafe.Pointer(pend)), &av_flashVer, &r.Link.flashVer)))
enc = C_AMF_EncodeNamedString(enc, pend, &av_flashVer, &r.Link.flashVer)
if enc == nil {
return 0
}
}
if r.Link.swfUrl.av_len != 0 {
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeNamedString((*C.char)(
// unsafe.Pointer(enc)), (*C.char)(unsafe.Pointer(pend)), &av_swfUrl, &r.Link.swfUrl)))
enc = C_AMF_EncodeNamedString(enc, pend, &av_swfUrl, &r.Link.swfUrl)
if enc == nil {
return 0
}
}
if r.Link.tcUrl.av_len != 0 {
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeNamedString((*C.char)(
//unsafe.Pointer(enc)), (*C.char)(unsafe.Pointer(pend)), &av_tcUrl, &r.Link.tcUrl)))
enc = C_AMF_EncodeNamedString(enc, pend, &av_tcUrl, &r.Link.tcUrl)
if enc == nil {
return 0
}
}
if r.Link.protocol&RTMP_FEATURE_WRITE == 0 {
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeNamedBoolean((*C.char)(
//unsafe.Pointer(enc)), (*C.char)(unsafe.Pointer(pend)), &av_fpad, 0)))
enc = C_AMF_EncodeNamedBoolean(enc, pend, &av_fpad, 0)
if enc == nil {
return 0
}
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeNamedNumber((*C.char)(
//unsafe.Pointer(enc)), (*C.char)(unsafe.Pointer(pend)), &av_capabilities, 15.0)))
enc = C_AMF_EncodeNamedNumber(enc, pend, &av_capabilities, 15.0)
if enc == nil {
return 0
}
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeNamedNumber((*C.char)(
// unsafe.Pointer(enc)), (*C.char)(unsafe.Pointer(pend)), &av_audioCodecs, r.m_fAudioCodecs)))
enc = C_AMF_EncodeNamedNumber(enc, pend, &av_audioCodecs, float64(r.m_fAudioCodecs))
if enc == nil {
return 0
}
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeNamedNumber((*C.char)(
//unsafe.Pointer(enc)), (*C.char)(unsafe.Pointer(pend)), &av_videoCodecs, r.m_fVideoCodecs)))
enc = C_AMF_EncodeNamedNumber(enc, pend, &av_videoCodecs, float64(r.m_fVideoCodecs))
if enc == nil {
return 0
}
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeNamedNumber((*C.char)(
// unsafe.Pointer(enc)), (*C.char)(unsafe.Pointer(pend)), &av_videoFunction, 1.0)))
enc = C_AMF_EncodeNamedNumber(enc, pend, &av_videoFunction, 1.0)
if enc == nil {
return 0
}
if r.Link.pageUrl.av_len != 0 {
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeNamedString((*C.char)(
//unsafe.Pointer(enc)), (*C.char)(unsafe.Pointer(pend)), &av_pageUrl, &r.Link.pageUrl)))
enc = C_AMF_EncodeNamedString(enc, pend, &av_pageUrl, &r.Link.pageUrl)
if enc == nil {
return 0
}
}
}
if r.m_fEncoding != 0.0 || r.m_bSendEncoding != 0 {
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeNamedNumber((*C.char)(
//unsafe.Pointer(enc)), (*C.char)(unsafe.Pointer(pend)), &av_objectEncoding, r.m_fEncoding)))
enc = C_AMF_EncodeNamedNumber(enc, pend, &av_objectEncoding, float64(r.m_fEncoding))
if enc == nil {
return 0
}
}
if int(uintptr(incBytePtr(unsafe.Pointer(enc), 3))) >= int(uintptr(
unsafe.Pointer(pend))) {
return 0
}
*indxBytePtr(unsafe.Pointer(enc), 0) = 0
enc = (*byte)(incBytePtr(unsafe.Pointer(enc), 1))
*indxBytePtr(unsafe.Pointer(enc), 0) = 0
enc = (*byte)(incBytePtr(unsafe.Pointer(enc), 1))
*indxBytePtr(unsafe.Pointer(enc), 0) = C.AMF_OBJECT_END
enc = (*byte)(incBytePtr(unsafe.Pointer(enc), 1))
/* add auth string */
if r.Link.auth.av_len != 0 {
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeBoolean((*C.char)(
// unsafe.Pointer(enc)), (*C.char)(unsafe.Pointer(pend)), r.Link.lFlags&RTMP_LF_AUTH)))
enc = C_AMF_EncodeBoolean(enc, pend, int(r.Link.lFlags&RTMP_LF_AUTH))
if enc == nil {
return 0
}
//enc = (*byte)(unsafe.Pointer(C.AMF_EncodeString((*C.char)(unsafe.Pointer(enc)),
//(*C.char)(unsafe.Pointer(pend)), &r.Link.auth)))
enc = C_AMF_EncodeString(enc, (*byte)(pend), &r.Link.auth)
if enc == nil {
return 0
}
}
if r.Link.extras.o_num != 0 {
for i := 0; i < int(r.Link.extras.o_num); i++ {
//enc = (*byte)(unsafe.Pointer(C.AMFProp_Encode((*C.AMFObjectProperty)(
//incPtr(unsafe.Pointer(&r.Link.extras.o_props), int(unsafe.Sizeof(
//r.Link.extras.o_props)), i)), (*C.char)(unsafe.Pointer(enc)), (*C.char)(
//unsafe.Pointer(pend)))))
enc = C_AMFPropEncode((*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 0
}
}
}
packet.m_nBodySize = C.uint32_t(int(uintptr(decBytePtr(unsafe.Pointer(enc),
int(uintptr(unsafe.Pointer(packet.m_body)))))))
//return int(C.RTMP_SendPacket(r, &packet, 1))
return C_RTMP_SendPacket(r, &packet, 1)
}
// char* AMFPropEncode(AMFOBjectProperty* prop, char* pBufer, char* pBufEnd);
// amf.c +366
func C_AMFPropEncode(p *C.AMFObjectProperty, pBuffer *byte, pBufEnd *byte) *byte {
if p.p_type == AMF_INVALID {
return nil
}
if p.p_type != AMF_NULL && int(uintptr(unsafe.Pointer(pBuffer)))+
int(p.p_name.av_len)+2+1 >= int(
uintptr(unsafe.Pointer(pBufEnd))) {
return nil
}
if p.p_type != AMF_NULL && p.p_name.av_len != 0 {
*indxBytePtr(unsafe.Pointer(pBuffer), 0) = byte(p.p_name.av_len >> 8)
pBuffer = (*byte)(incBytePtr(unsafe.Pointer(pBuffer), 1))
*indxBytePtr(unsafe.Pointer(pBuffer), 0) = byte(p.p_name.av_len & 0xff)
pBuffer = (*byte)(incBytePtr(unsafe.Pointer(pBuffer), 1))
memmove(unsafe.Pointer(pBuffer), unsafe.Pointer(p.p_name.av_val),
uintptr(p.p_name.av_len))
pBuffer = (*byte)(incBytePtr(unsafe.Pointer(pBuffer), int(p.p_name.av_len)))
}
switch p.p_type {
case AMF_NUMBER:
pBuffer = C_AMF_EncodeNumber(pBuffer, pBufEnd, float64(p.p_vu.p_number))
case AMF_BOOLEAN:
val := 0
if p.p_vu.p_number != 0 {
val = 1
}
pBuffer = C_AMF_EncodeBoolean(pBuffer, pBufEnd, val)
case AMF_STRING:
pBuffer = C_AMF_EncodeString(pBuffer, pBufEnd, &p.p_vu.p_aval)
case AMF_NULL:
if uintptr(incBytePtr(unsafe.Pointer(pBuffer), 1)) >= uintptr(unsafe.Pointer(
pBufEnd)) {
return nil
}
*(*byte)(unsafe.Pointer(pBuffer)) = AMF_NULL
pBuffer = (*byte)(incBytePtr(unsafe.Pointer(pBuffer), 1))
case AMF_OBJECT:
pBuffer = C_AMFEncode(&p.p_vu.p_object, pBuffer, pBufEnd)
//pBuffer = (*byte)(unsafe.Pointer(C.AMF_Encode(&p.p_vu.p_object, (*C.char)(
//unsafe.Pointer(pBuffer)), (*C.char)(unsafe.Pointer(pBufEnd)))))
case AMF_ECMA_ARRAY:
pBuffer = C_AMFEncodeEcmaArray(&p.p_vu.p_object, pBuffer, pBufEnd)
//pBuffer = (*byte)(unsafe.Pointer(C.AMF_EncodeEcmaArray(&p.p_vu.p_object, (*C.char)(unsafe.Pointer(pBuffer)), (*C.char)(unsafe.Pointer(pBufEnd)))))
case AMF_STRICT_ARRAY:
//pBuffer = (*byte)(unsafe.Pointer(C.AMF_EncodeArray(&p.p_vu.p_object, (*C.char)(unsafe.Pointer(pBuffer)), (*C.char)(unsafe.Pointer(pBufEnd)))))
pBuffer = C_AMFEncodeArray(&p.p_vu.p_object, pBuffer, pBufEnd)
default:
log.Println("C_AMFPropEncode: invalid type!")
pBuffer = nil
}
return pBuffer
}
// char* AMF_ENCODE(AMFObject* obj, char* pBuffer, char* pBufEnd);
// amf.c +891
func C_AMFEncode(obj *C.AMFObject, pBuffer *byte, pBufEnd *byte) *byte {
if uintptr(unsafe.Pointer(pBuffer))+uintptr(4) >= uintptr(unsafe.Pointer(pBufEnd)) {
return nil
}
*pBuffer = AMF_OBJECT
pBuffer = (*byte)(incBytePtr(unsafe.Pointer(pBuffer), 1))
for i := 0; i < int(obj.o_num); i++ {
res := C_AMFPropEncode((*C.AMFObjectProperty)(incPtr(unsafe.Pointer(
obj.o_props), i, int(unsafe.Sizeof(*obj.o_props)))), pBuffer, pBufEnd)
if res == nil {
log.Println("C_AMFEncode: failed to encode property in index")
break
} else {
pBuffer = res
}
}
if uintptr(incBytePtr(unsafe.Pointer(pBuffer), 3)) >= uintptr(unsafe.Pointer(pBufEnd)) {
return nil
}
pBuffer = C_AMFEncodeInt24(pBuffer, pBufEnd, int32(AMF_OBJECT_END))
return pBuffer
}
// char* AMF_EncodeEcmaArray(AMFObject* obj, char* pBuffer, char* pBufEnd);
// amf.c +924
func C_AMFEncodeEcmaArray(obj *C.AMFObject, pBuffer *byte, pBufEnd *byte) *byte {
if int(uintptr(unsafe.Pointer(pBuffer)))+4 >= int(uintptr(unsafe.Pointer(pBufEnd))) {
return nil
}
*pBuffer = AMF_ECMA_ARRAY
pBuffer = (*byte)(incBytePtr(unsafe.Pointer(pBuffer), 1))
pBuffer = C_AMF_EncodeInt32(pBuffer, pBufEnd, int32(obj.o_num))
for i := 0; i < int(obj.o_num); i++ {
res := C_AMFPropEncode((*C.AMFObjectProperty)(incPtr(unsafe.Pointer(
obj.o_props), i, int(unsafe.Sizeof(*obj.o_props)))), pBuffer, pBufEnd)
if res == nil {
log.Println("C_AMFEncodeEcmaArray: failed to encode property!")
break
} else {
pBuffer = res
}
}
if int(uintptr(unsafe.Pointer(pBuffer)))+3 >= int(uintptr(unsafe.Pointer(pBufEnd))) {
return nil
}
pBuffer = C_AMFEncodeInt24(pBuffer, pBufEnd, AMF_OBJECT_END)
return pBuffer
}
// char* AMF_EncodeArray(AMFObject* obj, char* pBuffer, char* pBufEnd);
// amf.c +959
func C_AMFEncodeArray(obj *C.AMFObject, pBuffer *byte, pBufEnd *byte) *byte {
if int(uintptr(unsafe.Pointer(pBuffer)))+4 >= int(uintptr(unsafe.Pointer(pBufEnd))) {
return nil
}
*pBuffer = AMF_STRICT_ARRAY
pBuffer = (*byte)(incBytePtr(unsafe.Pointer(pBuffer), 1))
pBuffer = C_AMF_EncodeInt32(pBuffer, pBufEnd, int32(obj.o_num))
for i := 0; i < int(obj.o_num); i++ {
res := C_AMFPropEncode((*C.AMFObjectProperty)(incPtr(unsafe.Pointer(
obj.o_props), i, int(unsafe.Sizeof(*obj.o_props)))), pBuffer, pBufEnd)
if res == nil {
log.Println("C_AMFEncodeEcmaArray: failed to encode property!")
break
} else {
pBuffer = res
}
}
return pBuffer
}
// int RTMP_ConnectStream(RTMP* r, int seekTime);
// rtmp.c +1099
func C_RTMP_ConnectStream(r *C.RTMP, seekTime int32) int {
var packet C.RTMPPacket
memset((*byte)(unsafe.Pointer(&packet)), 0, int(unsafe.Sizeof(packet)))
if seekTime > 0 {
r.Link.seekTime = C.int(seekTime)
}
r.m_mediaChannel = 0
// TODO: read packet
for r.m_bPlaying == 0 && C_RTMP_IsConnected(r) != 0 &&
C.RTMP_ReadPacket(r, &packet) != 0 {
// TODO: port is ready
if C_RTMPPacket_IsReady(&packet) != 0 {
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
}
// TODO: port this
C.RTMP_ClientPacket(r, &packet)
C.RTMPPacket_Free(&packet)
}
}
return int(r.m_bPlaying)
}
// int RTMP_ReadPacket(RTMP* r, RTMPPacket* packet);
// rtmp.c +3550
func C_RTMP_ReadPacket(r *C.RTMP, packet *C.RTMPPacket) int32 {
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 0
}
packet.m_headerType = C.uint8_t((hbuf[0] & 0xc0) >> 6)
packet.m_nChannel = C.int(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 0
}
packet.m_nChannel = C.int(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 0
}
tmp = int32((hbuf[2] << 8) + hbuf[1])
packet.m_nChannel = C.int(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 = (*C.int)(timestamp)
r.m_vecChannelsIn = packets
if timestamp == nil || packets == nil {
r.m_channelsAllocatedIn = 0
return 0
}
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 = C.int(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 0
}
hSize = int32(uintptr(incBytePtr(decBytePtr(unsafe.Pointer(header), int(uintptr(
unsafe.Pointer(&hbuf[0])))), int(nSize))))
if nSize >= 3 {
packet.m_nTimeStamp = C.uint32_t(C_AMF_DecodeInt24(header))
if nSize >= 6 {
packet.m_nBodySize = C.uint32_t(C_AMF_DecodeInt24((*byte)(incBytePtr(
unsafe.Pointer(header), 3))))
packet.m_nBytesRead = 0
if nSize > 6 {
packet.m_packetType = C.uint8_t(*indxBytePtr(unsafe.Pointer(header), 6))
if nSize == 11 {
// TODO: port this
packet.m_nInfoField2 = C.int32_t(C.DecodeInt32LE((*C.char)(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 0
}
// TODO: port this
packet.m_nTimeStamp = C.uint32_t(C.AMF_DecodeInt32((*C.char)(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, packet.m_nBodySize) == 0 {
log.Println("RTMPRead_Packet: failed to allocate packet")
return 0
}
packet.m_headerType = C.uint8_t((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 = C.int(hSize)
memmove(unsafe.Pointer(&packet.m_chunk.c_header[0]), unsafe.Pointer(&hbuf[0]),
uintptr(hSize))
packet.m_chunk.c_chunk = (*C.char)(incBytePtr(unsafe.Pointer(packet.m_body),
int(packet.m_nBytesRead)))
packet.m_chunk.c_chunkSize = C.int(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 0
}
packet.m_nBytesRead += C.uint32_t(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)(C.malloc(C.size_t(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) != 0 {
if packet.m_hasAbsTimestamp == 0 {
// timestamps seem to always be relative
packet.m_nTimeStamp += *(*C.uint32_t)(incPtr(unsafe.Pointer(r.m_channelTimestamp),
int(packet.m_nChannel), 4))
}
*(*C.uint32_t)(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 1
}
// #define RTMPPacket_IsReady(a)
// rtmp.h +142
func C_RTMPPacket_IsReady(p *C.RTMPPacket) int {
if p.m_nBytesRead == p.m_nBodySize {
return 1
}
return 0
}
func endSession(rtmp *C.RTMP) uint32 {
if rtmp == nil {
return 3
}
//C.RTMP_Close(rtmp)
//C.RTMP_Free(rtmp)
return 0
}
// int RTMP_Write(RTMP* r, const char* buf, int size);
// rtmp.c +5095
func C_RTMP_Write(r *C.RTMP, data []byte) int {
buf := sliceToPtr(data)
// TODO: port RTMPPacket
var pkt = &r.m_write
var pend, enc unsafe.Pointer
size := len(data)
s2 := size
var ret, num int
pkt.m_nChannel = 0x04
pkt.m_nInfoField2 = C.int32_t(r.m_stream_id)
for s2 != 0 {
if pkt.m_nBytesRead == 0 {
if size < minDataSize {
log.Printf("size: %d\n", size)
log.Printf("too small \n")
return 0
}
if *indxBytePtr(buf, 0) == 'F' && *indxBytePtr(buf, 1) == 'L' && *indxBytePtr(buf, 2) == 'V' {
buf = unsafe.Pointer(uintptr(buf) + uintptr(13))
s2 -= 13
}
pkt.m_packetType = C.uint8_t(*indxBytePtr(buf, 0))
buf = incBytePtr(buf, 1)
pkt.m_nBodySize = C.uint32_t(C_AMF_DecodeInt24((*byte)(buf)))
buf = incBytePtr(buf, 3)
pkt.m_nTimeStamp = C.uint32_t(C_AMF_DecodeInt24((*byte)(buf)))
buf = incBytePtr(buf, 3)
pkt.m_nTimeStamp |= C.uint32_t(*indxBytePtr(buf, 0)) << 24
buf = incBytePtr(buf, 4)
s2 -= 11
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 int(C.RTMPPacket_Alloc(pkt, pkt.m_nBodySize)) == 0 {
log.Println("Failed to allocate packet")
return 0
}
enc = unsafe.Pointer(pkt.m_body)
pend = incBytePtr(enc, int(pkt.m_nBodySize))
if pkt.m_packetType == RTMP_PACKET_TYPE_INFO {
enc = unsafe.Pointer(C_AMF_EncodeString((*byte)(enc), (*byte)(pend), &setDataFrame))
pkt.m_nBytesRead = C.uint32_t(math.Abs(float64(uintptr(enc) -
uintptr(unsafe.Pointer(pkt.m_body)))))
}
} else {
enc = incBytePtr(unsafe.Pointer(pkt.m_body), int(pkt.m_nBytesRead))
}
num = int(pkt.m_nBodySize - pkt.m_nBytesRead)
if num > s2 {
num = s2
}
memmove(enc, buf, uintptr(num))
pkt.m_nBytesRead += C.uint32_t(num)
s2 -= num
buf = incBytePtr(buf, num)
if pkt.m_nBytesRead == pkt.m_nBodySize {
// TODO: Port this
ret = C_RTMP_SendPacket(r, pkt, 0)
// TODO: Port this
C.RTMPPacket_Free(pkt)
pkt.m_nBytesRead = 0
if ret == 0 {
return -1
}
buf = incBytePtr(buf, 4)
s2 -= 4
if s2 < 0 {
break
}
}
}
return size + s2
}
// int RTMP_SendPacket(RTMP* r, RTMPPacket* packet, int queue);
// rtmp.c +3896
func C_RTMP_SendPacket(r *C.RTMP, packet *C.RTMPPacket, queue int) int {
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 int32
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)))
//packets = realloc(unsafe.Pointer(r.m_vecChannelsOut),
//int(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 0
}
r.m_vecChannelsOut = (**C.RTMPPacket)(packets)
C.memset(incPtr(unsafe.Pointer(r.m_vecChannelsOut), int(r.m_channelsAllocatedOut),
int(unsafe.Sizeof(packet))), 0, C.size_t(unsafe.Sizeof(packet)*
uintptr(n-int(r.m_channelsAllocatedOut))))
//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 = C.int(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 0
}
nSize = packetSize[int(packet.m_headerType)]
hSize = nSize
cSize = 0
t = int32(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_AMFEncodeInt24((*byte)(hptr), (*byte)(hend), res))
}
if nSize > 4 {
hptr = unsafe.Pointer(C_AMFEncodeInt24((*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((*C.char)(hptr),
C.int(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 {
var wrote int
if nSize < nChunkSize {
nChunkSize = nSize
}
if tbuf != nil {
//memmove(toff, header, uintptr(nChunkSize + hSize))
copy(ptrToSlice(toff, int(nChunkSize+hSize)), ptrToSlice(header,
int(nChunkSize+hSize)))
toff = incBytePtr(toff, nChunkSize+hSize)
} else {
// TODO: port this
wrote = int(C_WriteN(r, header, nChunkSize+hSize))
if wrote == 0 {
return 0
}
}
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
*indxBytePtr(header, 1) = byte(tmp & 0xff)
if cSize == 2 {
*indxBytePtr(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 {
wrote := int(C_WriteN(r, tbuf, int(uintptr(decBytePtr(toff,
int(uintptr(unsafe.Pointer(tbuf))))))))
//C.free(tbuf)
tbuf = nil
if wrote == 0 {
return 0
}
}
// We invoked a remote method
// TODO: port the const
if packet.m_packetType == RTMP_PACKET_TYPE_INVOKE {
// TODO: port C.AVal
var method C.AVal
var ptr unsafe.Pointer
ptr = incBytePtr(unsafe.Pointer(packet.m_body), 1)
//C.AMF_DecodeString((*C.char)(ptr), &method)
C_AMF_DecodeString((*byte)(ptr), &method)
if debugMode {
log.Printf("Invoking %v", method.av_val)
}
// keep it in call queue till result arrives
if queue != 0 {
var txn int
ptr = incBytePtr(ptr, 3+int(method.av_len))
//txn = int(C.AMF_DecodeNumber((*C.char)(ptr)))
txn = int(C_AMF_DecodeNumber((*byte)(ptr)))
C_AV_queue(&r.m_methodCalls, (*int32)(unsafe.Pointer(&r.m_numCalls)),
&method, int32(txn))
//C.AV_queue(&r.m_methodCalls, (*C.int)(unsafe.Pointer(&r.m_numCalls)), &method,
//C.int(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)(allocate(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 1
}
// int WriteN(RTMP* r, const char* buffer, int n);
// rtmp.c +1502
func C_WriteN(r *C.RTMP, buffer unsafe.Pointer, n int) int {
ptr := buffer
for n > 0 {
var nBytes int
// TODO: port this if necessary
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)
}
if n == 0 {
return 1
}
return 0
}
const length = 512
var RTMPT_cmds = []string{
"open",
"send",
"idle",
"close",
}
// int RTMPSockBuf_Send(RTMPSockBuf* sb, const char* buf, int len);
// rtmp.c +4297
func C_RTMPSockBuf_Send(sb *C.RTMPSockBuf, buf *byte, l int32) int32 {
return int32(C.send(sb.sb_socket, unsafe.Pointer(buf), C.size_t(l), 0))
}
// void AV_queue(RTMP_METHOD** vals, int* num, C.AVal* av, int txn);
// rtmp.c +2414
func C_AV_queue(vals **C.RTMP_METHOD, num *int32, av *C.AVal, txn int32) {
if (*num & 0x0f) == 0 {
// TODO: work out what to do with the realloc
//*vals = (*C.RTMP_METHOD)(realloc(unsafe.Pointer(*vals), int((*num+16)*
//int(unsafe.Sizeof(*(*vals))))))
*vals = (*C.RTMP_METHOD)(C.realloc(unsafe.Pointer(*vals), C.size_t((*num+16)*
int32(unsafe.Sizeof(*(*vals))))))
}
tmp := C.malloc(C.size_t(av.av_len + 1))
//tmp := allocate(uintptr(av.av_len + 1))
memmove(tmp, unsafe.Pointer(av.av_val), uintptr(av.av_len))
*indxBytePtr(tmp, int(av.av_len)) = '\000'
(*(*C.RTMP_METHOD)(incPtr(unsafe.Pointer(*vals), int(*num),
int(unsafe.Sizeof(*(*vals)))))).num = C.int(txn)
(*(*C.RTMP_METHOD)(incPtr(unsafe.Pointer(*vals), int(*num),
int(unsafe.Sizeof(*(*vals)))))).name.av_len = av.av_len
(*(*C.RTMP_METHOD)(incPtr(unsafe.Pointer(*vals), int(*num),
int(unsafe.Sizeof(*(*vals)))))).name.av_val = (*C.char)(tmp)
(*num)++
}
// char* AMF_EncodeNamedNumber(char* output, char* outend, const C.AVal* strName, double dVal);
// amf.c +286
func C_AMF_EncodeNamedNumber(output *byte, outend *byte, strName *C.AVal, dVal float64) *byte {
if int(uintptr(unsafe.Pointer(output)))+2+int(strName.av_len) > int(uintptr(unsafe.Pointer(outend))) {
return nil
}
output = C_AMF_EncodeInt16(output, outend, int16(strName.av_len))
memmove(unsafe.Pointer(output), unsafe.Pointer(strName.av_val), uintptr(strName.av_len))
output = (*byte)(incBytePtr(unsafe.Pointer(output), int(strName.av_len)))
return C_AMF_EncodeNumber(output, outend, dVal)
}
// char* AMF_EncodeNamedBoolean(char* output, char* outend, const C.AVal* strname, int bVal);
// amf.c +299
func C_AMF_EncodeNamedBoolean(output *byte, outend *byte, strName *C.AVal, bVal int) *byte {
if int(uintptr(unsafe.Pointer(output)))+2+int(strName.av_len) > int(uintptr(unsafe.Pointer(outend))) {
return nil
}
output = C_AMF_EncodeInt16(output, outend, int16(strName.av_len))
memmove(unsafe.Pointer(output), unsafe.Pointer(strName.av_val), uintptr(strName.av_len))
output = (*byte)(incBytePtr(unsafe.Pointer(output), int(strName.av_len)))
return C_AMF_EncodeBoolean(output, outend, bVal)
}
// char* AMF_EncodeBoolean(char* output, char* outend, int bVal);
// amf.c +260
func C_AMF_EncodeBoolean(output *byte, outend *byte, bVal int) *byte {
if int(uintptr(unsafe.Pointer(output)))+2 > int(uintptr(unsafe.Pointer(outend))) {
return nil
}
*(*byte)(unsafe.Pointer(output)) = AMF_BOOLEAN
output = (*byte)(incBytePtr(unsafe.Pointer(output), 1))
val := byte(0x01)
if bVal == 0 {
val = byte(0x00)
}
*(*byte)(unsafe.Pointer(output)) = val
output = (*byte)(incBytePtr(unsafe.Pointer(output), 1))
return output
}
// char* AMF_EncodeNumber(char* output, char* outend, double dVal);
// amf.c +199
func C_AMF_EncodeNumber(output *byte, outend *byte, dVal float64) *byte {
if int(uintptr(unsafe.Pointer(output)))+1+8 > int(uintptr(unsafe.Pointer(outend))) {
return nil
}
// TODO: port this
*(*byte)(unsafe.Pointer(output)) = C.AMF_NUMBER
output = (*byte)(incBytePtr(unsafe.Pointer(output), 1))
// NOTE: here we are assuming little endian for both byte order and float
// word order
var ci, co *uint8
ci = (*uint8)(unsafe.Pointer(&dVal))
co = (*uint8)(unsafe.Pointer(output))
for i := 0; i < 8; i++ {
*indxBytePtr(unsafe.Pointer(co), i) = *indxBytePtr(unsafe.Pointer(ci), 7-i)
}
return (*byte)(incBytePtr(unsafe.Pointer(output), 8))
}
// double AMF_DecodeNumber(const char* data);
// amf.c +82
func C_AMF_DecodeNumber(data *byte) float64 {
var dVal float64
var ci, co *uint8
ci = (*uint8)(unsafe.Pointer(data))
co = (*uint8)(unsafe.Pointer(&dVal))
for i := 0; i < 8; i++ {
*indxBytePtr(unsafe.Pointer(co), i) = *indxBytePtr(unsafe.Pointer(ci), 7-i)
}
return dVal
}
// char* AMF_EncodeNamedString(char* output, char* outend, const C.AVal* strName, const C.AVal* strValue);
// amf.c +273
func C_AMF_EncodeNamedString(output *byte, outend *byte, strName *C.AVal, strValue *C.AVal) *byte {
if int(uintptr(unsafe.Pointer(output)))+2+int(strName.av_len) > int(uintptr(unsafe.Pointer(outend))) {
return nil
}
output = C_AMF_EncodeInt16(output, outend, int16(strName.av_len))
memmove(unsafe.Pointer(output), unsafe.Pointer(strName.av_val), uintptr(strName.av_len))
output = (*byte)(incBytePtr(unsafe.Pointer(output), int(strName.av_len)))
return C_AMF_EncodeString(output, outend, strValue)
}
// void AMF_DecodeString(const char* data, C.AVal* bv);
// amf.c +68
func C_AMF_DecodeString(data *byte, bv *C.AVal) {
dataPtr := unsafe.Pointer(data)
//bv.av_len = C.int(C.AMF_DecodeInt16((*C.char)(dataPtr)))
bv.av_len = C.int(C_AMF_DecodeInt16((*byte)(dataPtr)))
if bv.av_len > 0 {
bv.av_val = (*C.char)(incBytePtr(dataPtr, 2))
} else {
bv.av_val = nil
}
}
// unsigned short AMF_DecodeInt16(const char* data);
// amf.c +41
func C_AMF_DecodeInt16(data *byte) uint16 {
c := unsafe.Pointer(data)
return uint16(*(*uint8)(c)<<8 | *(*byte)(incBytePtr(c, 1)))
}
// char* AMF_EncodeInt24(char* output, char* outend, int nVal);
// amf.c +149
func C_AMFEncodeInt24(output *byte, outend *byte, nVal int32) *byte {
outputPtr := unsafe.Pointer(output)
outendPtr := unsafe.Pointer(outend)
if uintptr(outputPtr)+3 > uintptr(outendPtr) {
// length < 3
return nil
}
// Assign output[2]
third := (*byte)(incBytePtr(outputPtr, 2))
*third = (byte)(nVal & 0xff)
// Assign output[1]
second := (*byte)(incBytePtr(outputPtr, 1))
*second = (byte)(nVal >> 8)
// Assign output[0]
*output = (byte)(nVal >> 16)
return (*byte)(incBytePtr(outputPtr, 3))
}
// unsigned int AMF_DecodeInt24(const char* data);
// amf.c +50
func C_AMF_DecodeInt24(data *byte) uint32 {
// TODO Understand logic and simplify
c := (*uint8)(unsafe.Pointer(data))
dst := uint32(int32(*c) << 16)
dst |= uint32(int32(*((*uint8)(unsafe.Pointer(uintptr(unsafe.Pointer(c)) +
(uintptr)(int32(1))*unsafe.Sizeof(*c))))) << 8)
dst |= uint32(int32(*((*uint8)(unsafe.Pointer(uintptr(unsafe.Pointer(c)) +
(uintptr)(int32(2))*unsafe.Sizeof(*c))))))
return dst
}
// char* AMF_EncodeString(char* output, char* outend, const C.AVal* bv);
// amf.c +174
func C_AMF_EncodeString(output *byte, outend *byte, bv *C.AVal) *byte {
outputPtr := unsafe.Pointer(output)
outendPtr := unsafe.Pointer(outend)
if (bv.av_len < 65536 && uintptr(incBytePtr(outputPtr, 1+2+int(bv.av_len))) >
uintptr(outendPtr)) || uintptr(incBytePtr(outputPtr, 1+4+int(bv.av_len))) >
uintptr(outendPtr) {
return nil
}
if bv.av_len < 65536 {
*(*byte)(outputPtr) = AMF_STRING
outputPtr = incBytePtr(outputPtr, 1)
outputPtr = unsafe.Pointer(C.AMF_EncodeInt16((*C.char)(outputPtr), (*C.char)(
outendPtr), C.short(bv.av_len)))
//outputPtr = unsafe.Pointer(C_AMF_EncodeInt16((*byte)(outputPtr),
//(*byte)(outendPtr), (int16)(bv.av_len)))
} else {
*(*byte)(outputPtr) = AMF_LONG_STRING
outputPtr = incBytePtr(outputPtr, 1)
outputPtr = unsafe.Pointer(C.AMF_EncodeInt32((*C.char)(outputPtr), (*C.char)(
outendPtr), C.int(bv.av_len)))
//outputPtr = unsafe.Pointer(C_AMF_EncodeInt32((*byte)(outputPtr),
//(*byte)(outendPtr), (int32)(bv.av_len)))
}
memmove(unsafe.Pointer(outputPtr), unsafe.Pointer(bv.av_val), uintptr(bv.av_len))
//C.memcpy(unsafe.Pointer(outputPtr), unsafe.Pointer(bv.av_val), (C.size_t)(bv.av_len))
outputPtr = incBytePtr(outputPtr, int(bv.av_len))
return (*byte)(outputPtr)
}
// char* AMF_EncodeInt16(char* output, char* outend, short nVal);
// amf.c +138
func C_AMF_EncodeInt16(output *byte, outend *byte, nVal int16) *byte {
outputPtr := unsafe.Pointer(output)
outendPtr := unsafe.Pointer(outend)
if uintptr(outputPtr)+2 > uintptr(outendPtr) {
// length < 2
return nil
}
// Assign output[1]
second := (*byte)(incBytePtr(outputPtr, 1))
*second = (byte)(nVal & 0xff)
// Assign output[0]
*output = (byte)(nVal >> 8)
return (*byte)(incBytePtr(outputPtr, 2))
}
// char* AMF_EncodeInt32(char* output, char* outend, int nVal);
// amf.c +161
func C_AMF_EncodeInt32(output *byte, outend *byte, nVal int32) *byte {
outputPtr := unsafe.Pointer(output)
outendPtr := unsafe.Pointer(outend)
if uintptr(outputPtr)+4 > uintptr(outendPtr) {
// length < 4
return nil
}
// Assign output[3]
forth := (*byte)(incBytePtr(outputPtr, 3))
*forth = (byte)(nVal & 0xff)
// Assign output[2]
third := (*byte)(incBytePtr(outputPtr, 2))
*third = (byte)(nVal >> 8)
// Assign output[1]
second := (*byte)(incBytePtr(outputPtr, 1))
*second = (byte)(nVal >> 16)
// Assign output[0]
*output = (byte)(nVal >> 24)
return (*byte)(incBytePtr(outputPtr, 4))
}
func realloc(ptr unsafe.Pointer, size int) unsafe.Pointer {
dest := allocate(uintptr(size))
if ptr != nil {
memmove(dest, ptr, uintptr(size))
}
return dest
}
func memmove(to, from unsafe.Pointer, n uintptr) {
copy(ptrToSlice(to, int(n)), ptrToSlice(from, int(n)))
}
// TODO: write test for this func
func memcmp(a, b unsafe.Pointer, size int) int {
for i := 0; i < size; i++ {
aValue := *indxBytePtr(a, i)
bValue := *indxBytePtr(b, i)
if aValue != bValue {
if aValue < bValue {
return -1
} else {
return 1
}
}
}
return 0
}
func memset(ptr *byte, val int, num int) {
for i := 0; i < num; i++ {
*indxBytePtr(unsafe.Pointer(ptr), int(i)) = byte(uint8(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)
}
// wrapper for converting slice to unsafe.pointer
func sToUP(b []byte) unsafe.Pointer {
return unsafe.Pointer(&b[0])
}
// 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] = *indxBytePtr(ptr, i)
}
slice[l] = '\000'
return &slice[0]
}
// Duplicates a string given as a byte pointer
func strdup(str *byte) *byte {
length := strlen(str)
newMem := make([]byte, length+1)
oldMem := ptrToSlice(unsafe.Pointer(str), int(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 {
var ptr *byte
for i := 0; i < 1000; i++ {
ptr = indxBytePtr(unsafe.Pointer(str), i)
if *ptr == '\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 {
var ptr *byte
for i := 0; i < 1000; i++ {
ptr = indxBytePtr(unsafe.Pointer(str), i)
if *ptr == val {
return ptr
}
if *ptr == '\000' {
break
}
}
return nil
}
// Creates mem of the size noOfBytes. returns as unsafe pointer
func allocate(nOfBytes uintptr) unsafe.Pointer {
mem := make([]byte, int(nOfBytes))
return unsafe.Pointer(&mem[0])
}
// indxBytePtr returns a byte at the indx inc give a ptr
func indxBytePtr(ptr unsafe.Pointer, inc int) *byte {
return (*byte)(incPtr(ptr, inc, 1))
}
// indxInt32Ptr returns an int32 at the indx inc given a ptr
func indxInt32Ptr(ptr unsafe.Pointer, inc int) *int32 {
return (*int32)(incPtr(ptr, inc, 4))
}
// indxInt64Ptr returns an int64 at the indx inc given a ptr
func indxInt64Ptr(ptr unsafe.Pointer, inc int) *int64 {
return (*int64)(incPtr(ptr, inc, 8))
}
// 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)
}
// 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, 4)
}
// 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, 8)
}
// 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)
}
// 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, 4)
}
// 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, 8)
}
// 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])
}
// ptrToSlice returns a slice given unsafe pointer and size - no allocation and
// copying is required - same data is used.
func ptrToSlice(data unsafe.Pointer, size int) []byte {
var ret []byte
shDest := (*reflect.SliceHeader)(unsafe.Pointer(&ret))
shDest.Data = uintptr(data)
shDest.Len = size
shDest.Cap = size
return ret
}
// C.AVal is in amf.h
// See AVC(str) {str, sizeof(str)-1} in amf.h
func AVC(str string) C.AVal {
var aval C.AVal
aval.av_val = C.CString(str)
aval.av_len = C.int(len(str))
return aval
}
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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