摘要：
让我们来谈谈EasyPlayerPro接口的调用，它主要分为C++和C#。C++也可以基于VC和QT开发。C++使用VCMFC框架作为示例，C#使用Winform框架作为示例。“）；}暂停并单步播放voidCplayerDlg:：OnBnCickedBtnPause（）｛//TODO:如果（！M_bPlayPause；CSkinButton*pBtn=GetItemByName；如果｛如果｛pBtn-˃SetBtnText；｝否则｛pBtn-˃SetBtnText；｝｝VoidPlayerDlg:：OnBnCickedBtnPlayByFrame（）｛//TODO:在此处添加控件通知处理程序代码//EasyPlayerPro_StepPlay；m_bPlayPause=TRUE；CSkinButton*pBtn=GetItemByName；if｛if｛pBtn-˃SetBtnText；｝否则｛pBtn-˃SetBtnText；｝｝它可以在这里直接调用，而无需过多的阐述。
下面我们来讲解一下关于EasyPlayerPro接口的调用，主要分为C++和C#两种语言，C++也可以基于VC和QT进行开发，C++以VC MFC框架为例进行讲解，C#以Winform框架为例进行讲解。
VC开发EasyPlayerPro
首先建一个基于MFC Dialog的工程，取名叫EasyPlayerPro，关于界面逻辑的处理过程就不做过多赘述了，大家有兴趣的可以去看EasyPlayerPro项目代码；下面我们讲解一下EasyPlayerPro的调用流程：(1) 打开一个流或文件进行播放
通过EasyPlayerPro_Open打开一个流或者本地文件，打开以后即播放，不需要调用EasyPlayerPro_Play方法，调用完成后，注意，比如拉网络流的时候，由于Open函数是非阻塞而立即返回的，所以，播放过程可能尚未初始化完成，从而获取流的信息可能获取不到，正确的做法是在线程或者计时器里面轮询获取；Open完成后，我们可以对一些参数进行设置，比如设置OSD和图片叠加，显示模式，音量大小等：
// player open file
m_player = EasyPlayerPro_Open(str, m_stcVideoWnd->GetSafeHwnd());
if (m_player)
{
m_bPlayPause = FALSE;
SetTimer(TIMER_ID_PROGRESS, 1000, NULL);
m_bOpening = TRUE;
//字幕和图片叠加
//
// EasyPlayerPro_SetLogo 设置台标/LOGO
// player - 指向 EasyPlayerPro_Open 返回的 player 对象
// bIsUse - 是否使用水印 1=启用 0=不启用
// ePos - 台标位置：1==leftttop 2==righttop 3==leftbottom 4==rightbottom
// eStyle - 水印的风格，见WATERMARK_ENTRY_TYPE声明
// x - 水印左上角位置x坐标
// y - 水印左上角位置y坐标
// width - 宽
// height - 高
// logopath - 水印图片路径
EasyPlayerPro_SetLogo (m_player, 1, 2, 3,
0, 0, 0, 0, "C:\Dingshuai\Project\Easylogo.png");
// EasyPlayerPro_SetOSD 设置叠加字幕
// player - 指向 EasyPlayerPro_Open 返回的 player 对象
// bIsUse - 是否使用水印 1=启用 0=不启用 -1=删除
// nMoveType - 移动类型：0--固定位置，1--从左往右，2--从右往左，
// R,G,B - 字体颜色对应三个分量红绿蓝0-255
// x - 字幕显示左上角位置x坐标
// y - 字幕显示左上角位置y坐标
// weight - 字体权重，见如下声明
// /* Font Weights */
// #define FW_DONTCARE 0
// #define FW_THIN 100
// #define FW_EXTRALIGHT 200
// #define FW_LIGHT 300
// #define FW_NORMAL 400
// #define FW_MEDIUM 500
// #define FW_SEMIBOLD 600
// #define FW_BOLD 700
// #define FW_EXTRABOLD 800
// #define FW_HEAVY 900
// #define FW_ULTRALIGHT FW_EXTRALIGHT
// #define FW_REGULAR FW_NORMAL
// #define FW_DEMIBOLD FW_SEMIBOLD
// #define FW_ULTRABOLD FW_EXTRABOLD
// #define FW_BLACK FW_HEA
// width - 宽
// height - 高
// fontname - 字体名称，如“宋体”“楷体”“隶书”“华文行楷”......
// tittleContent - OSD显示内容
EasyPlayerPro_SetOSD (m_player, 1, 1, 0, 255, 0,
700, 100, 200, 0, -29, "隶书", "你说你爱了不该爱的人，你的心中满是伤痕！");
}(2) 暂停和单步播放
void CplayerDlg::OnBnClickedBtnPause()
{
// TODO: 在此添加控件通知处理程序代码
if (!m_bPlayPause) EasyPlayerPro_Pause(m_player);
else EasyPlayerPro_Play(m_player);
m_bPlayPause = !m_bPlayPause;
CSkinButton* pBtn = (CSkinButton*)GetItemByName(_T("Pause"));
if(pBtn)
{
if (m_bPlayPause)
{
pBtn->SetBtnText(_T("播放"));
}
else
{
pBtn->SetBtnText(_T("暂停"));
}
}
}
void CplayerDlg::OnBnClickedBtnPlayByFrame()
{
// TODO: 在此添加控件通知处理程序代码
//
EasyPlayerPro_StepPlay(m_player);
m_bPlayPause = TRUE;
CSkinButton* pBtn = (CSkinButton*)GetItemByName(_T("Pause"));
if(pBtn)
{
if (m_bPlayPause)
{
pBtn->SetBtnText(_T("播放"));
}
else
{
pBtn->SetBtnText(_T("暂停"));
}
}
}这里直接调用即可，不做过多赘述。
(3) 快放和慢放
void CplayerDlg::OnBnClickedBtnRatePlay()
{
int nRate = 0;
switch(m_speedRate)
{
case SPEED_SLOW_X4:
nRate = 25;
break;
case SPEED_SLOW_X2:
nRate = 50;
break;
case SPEED_NORMAL:
nRate = 100;
break;
case SPEED_FAST_X2:
nRate = 200;
break;
case SPEED_FAST_X4:
nRate = 300;
break;
case SPEED_FAST_X8:
nRate = 400;
break;
case SPEED_FAST_X16:
nRate = 500;
break;
case SPEED_FAST_X64:
nRate = 600;
break;
}
EasyPlayerPro_Setparam(m_player, EASY_PARAM_PLAY_SPEED, &nRate);
}目前定义慢放范围为2倍和4倍，快放范围为2，4，8，16，64倍，超过这个范围则无明显反应或者意义。
(4) 抓图接口调用
void CplayerDlg::OnBnClickedBtnSnapshot()
{
// TODO: 在此添加控件通知处理程序代码
//
TCHAR sPath[512];
memset(sPath, 0x00, sizeof(TCHAR) * 512);
GetWorkDirectory(sPath, 512);
int nPathLen = _tcslen(sPath);
if ((sPath[nPathLen - 1] != '/' && sPath[nPathLen - 1] != '\'))
{
sPath[nPathLen] = '\';
}
unsigned int timestamp = (unsigned int)time(NULL);
time_t tt = timestamp;
struct tm _time;
::localtime_s(&_time, &tt);
char szTime[64] = { 0, };
strftime(szTime, 32, "\pic_%Y%m%d%H%M%S.jpg", &_time);
CString strTime = (CString)szTime;
CString sScreenPath = _T("");
sScreenPath.Format(_T("%s%s"), sPath, _T("ScreenShot"));
bool bSec = EnsureDirExist(sScreenPath);
sScreenPath += strTime;
USES_CONVERSION;
EasyPlayerPro_Snapshot(m_player, T2A(sScreenPath), 0, 0, 1000);
}抓图接口直接调用即可，注意保存的路径需要存在，否则，抓图保存将会失败。
(5) 录像接口调用
void CplayerDlg::OnBnClickedBtnRecord()
{
// TODO: 在此添加控件通知处理程序代码
if(!m_player)
return ;
CSkinButton* pBtn = (CSkinButton*)GetItemByName(_T("Record"));
if (!pBtn)
{
return;
}
if (!m_bRecording)
{
pBtn->SetBtnText(_T("停止录像"));
TCHAR sPath[512];
memset(sPath, 0x00, sizeof(TCHAR)*512);
GetWorkDirectory(sPath, 512);
int nRecordPathLen = _tcslen(sPath);
if ((sPath[nRecordPathLen - 1] != '/' && sPath[nRecordPathLen - 1] != '\'))
{
sPath[nRecordPathLen] = '\';
}
unsigned int timestamp = (unsigned int)time(NULL);
time_t tt = timestamp;
struct tm _time;
::localtime_s(&_time, &tt);
char szTime[64] = { 0, };
strftime(szTime, 32, "\record_%Y%m%d%H%M%S.mp4", &_time);
CString strTime = (CString)szTime;
CString sRecordPath = _T("");
sRecordPath.Format(_T("%s%s"), sPath, _T("Record"));
bool bSec = EnsureDirExist(sRecordPath);
sRecordPath += strTime;
UpdateData(TRUE);
CString sRecDuration = _T("");
if(m_editRecPieceTime)
m_editRecPieceTime->GetWindowText(sRecDuration);
int nDuration = _ttoi( sRecDuration.GetBuffer());
//m_SNPlayOcx.EasyPlayPro_PlayOcx_Record(sRecordPath, m_sRtspUrl, nDuration);
//m_SNPlayOcx.EasyPlayPro_PlayOcx_Record(_T("D:\test.mp4"), m_sRtspUrl);
USES_CONVERSION;
EasyPlayerPro_Record(m_player, T2A(sRecordPath), nDuration);
m_lRecordTime = 0;//IDC_STATIC_RECORD_STATUS
SetTimer(TIMER_RECORD_STATUS, 300, NULL);
}
else
{
pBtn->SetBtnText(_T("录像"));
EasyPlayerPro_Stoprecord(m_player);
KillTimer(TIMER_RECORD_STATUS);
EasyPlayerPro_Getparam(m_player, EASY_PARAM_RECORD_TIME, &m_lRecordTime);
EasyPlayerPro_Getparam(m_player, EASY_PARAM_RECORD_PIECE_ID, &m_lRecordSliceUp);
int thh, tmm, tss = 0;
thh = m_lRecordTime / 3600;
tmm = (m_lRecordTime % 3600) / 60;
tss = (m_lRecordTime % 60);
CString sShowRec = _T("");
if (m_lRecordSliceUp > -1)
sShowRec.Format(_T("录像已停止 录制时间：%02d:%02d:%02d 切片ID：%d"), thh, tmm, tss, m_lRecordSliceUp);
else
sShowRec.Format(_T("录像已停止 录制时间：%02d:%02d:%02d"), thh, tmm, tss);
SetString(4, sShowRec);
m_lRecordTime = 0;//IDC_STATIC_RECORD_STATUS
}
m_bRecording = !m_bRecording;
}
EasyPlayPro_PlayOcx_Record接口调用进行录像，EasyPlayerPro_Stoprecord接口调用停止录像，EasyPlayerPro_Getparam接口获取录像的时间和当前录像的PieceId, 具体参数见上一篇文章EasyPlayerPro接口说明。
(6) 本地文件和点播拖拽
a. 进度显示计时
case TIMER_ID_PROGRESS://进度条计时器
{
#if 1
if (m_totalDuration <= 0)
{
LONGLONG ltotal = 0;
EasyPlayerPro_Getparam(m_player, EASY_PARAM_MEDIA_DURATION, <otal);
if (ltotal>1)
{
m_totalDuration = ltotal/1000;
int totalSeconds = (int)m_totalDuration;
int gTotalSeconds = totalSeconds;
int gTotalMinute = (int)(totalSeconds / 60);
int nTotalHour = (int)(gTotalMinute / 60); //时
int nTotalMinute = (int)(gTotalMinute % 60);//分
int totalSecond = (int)(totalSeconds % 60); //秒
m_strPlayFileTime.Format(_T("%02d:%02d:%02d"), nTotalHour, nTotalMinute, totalSecond);
if (m_sliderPlay)
{
m_sliderPlay->SetRange(0, m_totalDuration);
m_sliderPlay->SetPos(0);
}
m_sliderPlay->EnableWindow(TRUE);
}
}
LONGLONG llCurPos = 0;
LONGLONG llPos = 0;
EasyPlayerPro_Getparam(m_player, EASY_PARAM_MEDIA_POSITION, &llPos);
llCurPos = llPos/1000;
TRACE("Position == %d
",llCurPos);
int totalSeconds = (int)llCurPos;
int gTotalSeconds = totalSeconds;
int gTotalMinute = (int)(totalSeconds / 60);
int nTotalHour = (int)(gTotalMinute / 60); //时
int nTotalMinute = (int)(gTotalMinute % 60);//分
int totalSecond = (int)(totalSeconds % 60); //秒
CString strTemp = _T("");
if (m_totalDuration>0 )
{
if (llCurPos<m_totalDuration)
{
strTemp.Format(_T("%02d:%02d:%02d/%s"), nTotalHour, nTotalMinute, totalSecond, m_strPlayFileTime);
if (m_sliderPlay)
{
m_sliderPlay->SetPos(llCurPos);
}
}
else
{
#if 0
KillTimer(TIMER_ID_PROGRESS);
PlayerCloseFile();
SetString(2,_T(""));
m_totalDuration = -1;
m_sliderPlay->SetRange(0, 2000);
m_sliderPlay->SetPos(0);
m_speedRate = 0;
#endif
OnBnClickedBtnClose();
strTemp = _T("");
}
}
else
strTemp.Format(_T("%02d:%02d:%02d/../../.."), nTotalHour, nTotalMinute, totalSecond);
SetString(2,strTemp);
#endif
}
break;b. 拖拽进度条OnHScroll消息处理
if (m_sliderPlay==pSliderTmp)
{
if (nSBCode == 5)
{
int nPos = m_sliderPlay->GetPos();
TRACE("nPos==%d
", nPos);
//如果处于断点循环
#if 0
if (m_bLoopAB)
{
if(nPos<m_dbBreakPtA || nPos>m_dbBreakPtB)
{
nPos = m_dbBreakPtA;
}
}
#endif
if (m_totalDuration>0)
{
EasyPlayerPro_Seek(m_player, nPos*1000);
}
}
}c. 音量调节进度条OnHScroll消息处理
else if (m_sliderSound == pSliderTmp)//音量调节
{
int nValue = m_sliderSound->GetPos();
nValue -= 255;
EasyPlayerPro_Setparam(m_player, EASY_PARAM_AUDIO_VOLUME, &nValue);
}
- C#开发EasyPlayerPro
C#我真不擅长，故此，只对libEasyPlayerPro的调用做简单介绍；
首先，创建一个Winform程序（类似于MFC的Dialog程序），然后导入 libeasyplayerpro.dll，生成实体类，即可调用接口。
(1) libeasyplayerpro.dll接口类化
导入dll，生产类，声明需要用到的参数列表如下：
public enum tagEASY_PARAM_ID
{
//++ public
// duration & position
PARAM_MEDIA_DURATION = 0x1000,
PARAM_MEDIA_POSITION,
// media detail info
PARAM_VIDEO_WIDTH,
PARAM_VIDEO_HEIGHT,
// video display mode
PARAM_VIDEO_MODE,
// audio volume control
PARAM_AUDIO_VOLUME,
// playback speed control
PARAM_PLAY_SPEED,
// video decode thread count
PARAM_DECODE_THREAD_COUNT,
// visual effect mode
PARAM_VISUAL_EFFECT,
// audio/video sync diff
PARAM_AVSYNC_TIME_DIFF,
// player event callback
PARAM_PLAYER_CALLBACK,
// audio/video stream
PARAM_AUDIO_STREAM_TOTAL,
PARAM_VIDEO_STREAM_TOTAL,
PARAM_SUBTITLE_STREAM_TOTAL,
PARAM_AUDIO_STREAM_CUR,
PARAM_VIDEO_STREAM_CUR,
PARAM_SUBTITLE_STREAM_CUR,
//-- public
//++ for adev
PARAM_ADEV_RENDER_TYPE = 0x2000,
//-- for adev
//++ for vdev
PARAM_VDEV_RENDER_TYPE = 0x3000,
PARAM_VDEV_FRAME_RATE,
//-- for vdev
//++ for render
PARAM_RENDER_UPDATE = 0x4000,
PARAM_RENDER_START_PTS,
//-- for render
};声明Easyplayerpro接口如下：
//初始化播放视频
[DllImport("libEasyplayerpro.dll", EntryPoint = "EasyPlayerPro_Open", CallingConvention = CallingConvention.Cdecl)]
static extern IntPtr EasyPlayerPro_Open(string file, IntPtr hwnd);
//关闭视频
[DllImport("libEasyplayerpro.dll", EntryPoint = "EasyPlayerPro_Close", CallingConvention = CallingConvention.Cdecl)]
static extern void EasyPlayerPro_Close(IntPtr player);
//播放视频
[DllImport("libEasyplayerpro.dll", EntryPoint = "EasyPlayerPro_Play", CallingConvention = CallingConvention.Cdecl)]
static extern void EasyPlayerPro_Play(IntPtr player);
//单针播放视频
[DllImport("libEasyplayerpro.dll", EntryPoint = "EasyPlayerPro_StepPlay", CallingConvention = CallingConvention.Cdecl)]
static extern void EasyPlayerPro_StepPlay(IntPtr player);
//暂停视频
[DllImport("libEasyplayerpro.dll", EntryPoint = "EasyPlayerPro_Pause", CallingConvention = CallingConvention.Cdecl)]
static extern void EasyPlayerPro_Pause(IntPtr player);
//设置时长
[DllImport("libEasyplayerpro.dll", EntryPoint = "EasyPlayerPro_Seek", CallingConvention = CallingConvention.Cdecl)]
static extern void EasyPlayerPro_Seek(IntPtr player, long ms);
//设置窗口
[DllImport("libEasyplayerpro.dll", EntryPoint = "EasyPlayerPro_Resize", CallingConvention = CallingConvention.Cdecl)]
static extern void EasyPlayerPro_Resize(IntPtr player, int type, int x, int y, int w, int h);
//截图
[DllImport("libEasyplayerpro.dll", EntryPoint = "EasyPlayerPro_Snapshot", CallingConvention = CallingConvention.Cdecl)]
static extern int EasyPlayerPro_Snapshot(IntPtr player, string file, int w, int h, int wait);
//设置参数
[DllImport("libEasyplayerpro.dll", EntryPoint = "EasyPlayerPro_Setparam", CallingConvention = CallingConvention.Cdecl)]
static extern void EasyPlayerPro_Setparam(IntPtr player, uint id, ref IntPtr param);
//得到参数
[DllImport("libEasyplayerpro.dll", EntryPoint = "EasyPlayerPro_Getparam", CallingConvention = CallingConvention.Cdecl)]
static extern void EasyPlayerPro_Getparam(IntPtr player, uint id, ref IntPtr param);声明一个指针变量用于存放播放器指针：
private IntPtr mPlayer;
创建一个按钮，点击消息处理：
private void button1_Click(object sender, EventArgs e)
{ EasyPlayerPro_Open("rtmp://live.hkstv.hk.lxdns.com/live/hks", panel1.Handle);
}
其中，panel1是创建的一个pannel，用于显示视频的窗口；
这样，其他接口调用也类似，具体可参考C++的调用流程，这里不做过多赘述；
关于EasyPlayerPro
EasyPlayerPro是一款全功能的流媒体播放器，支持RTSP、RTMP、HTTP、HLS、UDP、RTP等多种流媒体协议播放、支持本地文件播放，支持本地抓拍、本地录像、播放旋转、多屏播放等多种功能特性，稳定、高效、可靠，支持Windows、Android、iOS三个平台，目前在多家教育、安防、行业型公司，都得到的应用，广受好评！
EasyPlayerPro：https://github.com/EasyDSS/EasyPlayerPro
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