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lal/pkg/rtmp/client_pull_session.go

158 lines
4.9 KiB
Go

// Copyright 2019, Chef. All rights reserved.
// https://github.com/q191201771/lal
//
// Use of this source code is governed by a MIT-style license
// that can be found in the License file.
//
// Author: Chef (191201771@qq.com)
package rtmp
import (
"github.com/q191201771/lal/pkg/base"
)
type OnReadRtmpAvMsg func(msg base.RtmpMsg)
type PullSession struct {
core *ClientSession
}
type PullSessionOption struct {
// PullTimeoutMs
//
// 从调用Pull函数到接收音视频数据的前一步也即收到服务端返回的rtmp play对应结果的信令的超时时间
// 如果为0则没有超时时间
//
PullTimeoutMs int
ReadAvTimeoutMs int
ReadBufSize int // io层读取音视频数据时的缓冲大小如果为0则没有缓冲
HandshakeComplexFlag bool
PeerWinAckSize int
ReuseReadMessageBufferFlag bool // 接收Message时是否复用内存块
}
var defaultPullSessionOption = PullSessionOption{
PullTimeoutMs: 10000,
ReadAvTimeoutMs: 0,
ReadBufSize: 0,
HandshakeComplexFlag: false,
PeerWinAckSize: 0,
ReuseReadMessageBufferFlag: true,
}
type ModPullSessionOption func(option *PullSessionOption)
func NewPullSession(modOptions ...ModPullSessionOption) *PullSession {
opt := defaultPullSessionOption
for _, fn := range modOptions {
fn(&opt)
}
return &PullSession{
core: NewClientSession(base.SessionTypeRtmpPull, func(option *ClientSessionOption) {
option.DoTimeoutMs = opt.PullTimeoutMs
option.ReadAvTimeoutMs = opt.ReadAvTimeoutMs
option.ReadBufSize = opt.ReadBufSize
option.HandshakeComplexFlag = opt.HandshakeComplexFlag
option.PeerWinAckSize = opt.PeerWinAckSize
option.ReuseReadMessageBufferFlag = opt.ReuseReadMessageBufferFlag
}),
}
}
// WithOnPullSucc Pull成功
//
// 如果你想保证绝对时序,在 WithOnReadRtmpAvMsg 回调音视频数据前,做一些操作,那么使用这个回调替代 Pull 返回成功
//
func (s *PullSession) WithOnPullSucc(onPullResult func()) *PullSession {
s.core.onDoResult = onPullResult
return s
}
// WithOnReadRtmpAvMsg
//
// @param onReadRtmpAvMsg:
// msg: 关于内存块的说明:
// ReuseReadMessageBufferFlag 为true时
// 回调结束后,`msg`的内存块会被`PullSession`重复使用。
// 也即多次回调的`msg`是复用的同一块内存块。
// 如果业务方需要在回调结束后,依然持有`msg`,那么需要对`msg`进行拷贝,比如调用`msg.Clone()`。
// 只在回调中使用`msg`,则不需要拷贝。
// ReuseReadMessageBufferFlag 为false时
// 回调接收后,`PullSession`不再使用该内存块。
// 业务方可以自由持有释放该内存块。
//
func (s *PullSession) WithOnReadRtmpAvMsg(onReadRtmpAvMsg OnReadRtmpAvMsg) *PullSession {
s.core.onReadRtmpAvMsg = onReadRtmpAvMsg
return s
}
// Pull 阻塞直到和对端完成拉流前的所有准备工作也即收到RTMP Play response或者发生错误
//
//
func (s *PullSession) Pull(rawUrl string) error {
return s.core.Do(rawUrl)
}
// ---------------------------------------------------------------------------------------------------------------------
// IClientSessionLifecycle interface
// ---------------------------------------------------------------------------------------------------------------------
// Dispose 文档请参考: IClientSessionLifecycle interface
//
func (s *PullSession) Dispose() error {
return s.core.Dispose()
}
// WaitChan 文档请参考: IClientSessionLifecycle interface
//
func (s *PullSession) WaitChan() <-chan error {
return s.core.WaitChan()
}
// ---------------------------------------------------------------------------------------------------------------------
// Url 文档请参考: interface ISessionUrlContext
func (s *PullSession) Url() string {
return s.core.Url()
}
// AppName 文档请参考: interface ISessionUrlContext
func (s *PullSession) AppName() string {
return s.core.AppName()
}
// StreamName 文档请参考: interface ISessionUrlContext
func (s *PullSession) StreamName() string {
return s.core.StreamName()
}
// RawQuery 文档请参考: interface ISessionUrlContext
func (s *PullSession) RawQuery() string {
return s.core.RawQuery()
}
// UniqueKey 文档请参考: interface IObject
func (s *PullSession) UniqueKey() string {
return s.core.UniqueKey()
}
// ----- ISessionStat --------------------------------------------------------------------------------------------------
// GetStat 文档请参考: interface ISessionStat
func (s *PullSession) GetStat() base.StatSession {
return s.core.GetStat()
}
// UpdateStat 文档请参考: interface ISessionStat
func (s *PullSession) UpdateStat(intervalSec uint32) {
s.core.UpdateStat(intervalSec)
}
// IsAlive 文档请参考: interface ISessionStat
func (s *PullSession) IsAlive() (readAlive, writeAlive bool) {
return s.core.IsAlive()
}