调用DirectX进行简单的多媒体编程系列（四）

但上面的例子中，只能播放单一文件，如果要是多个文件选择多个声卡同时播放呢？想到使用多线程来实现，再次封装多线程播放类

 

AudioPalyer类，有三个事件，当播放时触发OnAudioPlay事件，当循环播放时触发OnLoopingPlay事件，当正常播放时触发OnNormalPlay事件，代码如下：

 using System;

using System.Collections.Generic;
using System.Linq;
using System.Text;
using QBAudioLib;
using System.Threading;

namespace QBAudioThread
{
    public struct playInfo
    {
        public Guid devId;
        public string fileName;
        public PlayFlags thisFlag;
    }
    public class AudioEventArgs : EventArgs
    {
        public playInfo AudioPlayInfo;
    }
    public class AudioPlayer
    {
        QBAudioCtrl qbCtrl;
        DeviceStatus devStauts;
        playInfo thisInfo;
        public delegate void DefEventHandler(object sender,AudioEventArgs args);
        public event DefEventHandler OnAudioPlay;//开始播放事件
        public event EventHandler OnNormalPaly;//默认正常播放时事件
        public event EventHandler OnLoopingPaly;//循环播放时事件
        public AudioPlayer(playInfo iPlay)
        {
            thisInfo = iPlay;
        }
        public void Audio_Play()
        {
            Monitor.Enter(this);
            qbCtrl = new QBAudioCtrl(thisInfo.devId, thisInfo.fileName);
            qbCtrl.Dev_Play(thisInfo.thisFlag);
            devStauts = qbCtrl.GetDeviceStatus();
            //开始播放激发的事件
            if (devStauts.isPlaying == true)
            {
                AudioEventArgs thisArgs = new AudioEventArgs();
                thisArgs.AudioPlayInfo = thisInfo;
                OnAudioPlay(this, thisArgs);
            }
            if (devStauts.isLooping == false)
            {//默认播放激发的事件
                OnNormalPaly(this, new EventArgs());
            }
            else
            {//循环播放激发的事件
                OnLoopingPaly(this, new EventArgs());
            }
            Monitor.Exit(this);
            Thread.Sleep(1000);

        }
    }
}

 界面实现：

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using QBAudioLib;
using System.Threading;


namespace QBAudioThread
{
    public partial class Form2 : Form
    {
        PlayFlags thisFlags;
        DataTable dt = new DataTable();
        Thread threadPlay;

        public Form2()
        {
            InitializeComponent();

        }

        private void Form2_Load(object sender, EventArgs e)
        {
            //获得所有的音频设备
            List<DeviceInfo> devInfo = QBDeviceHelper.GetDeviceList();
            foreach (DeviceInfo dev in devInfo)
            {
                cBox_Devices.Items.Add(new KeyValuePair<Guid, string>(dev.DevId, dev.Description));
            }
            cBox_Devices.SelectedIndex = 0;

            this.thisFlags = PlayFlags.Default;


            dt.Columns.Add("devId", typeof(Guid));
            dt.Columns.Add("fileName", typeof(string));
            dt.Columns.Add("thisFlag", typeof(PlayFlags));

            dataGridView1.DataSource = dt;

        }

        private void btn_play_Click(object sender, EventArgs e)//播放
        {
            try
            {
                int i = 0;
                foreach (DataGridViewRow row in dataGridView1.Rows)
                {
                    if ((bool)row.Cells[0].FormattedValue == true)
                    {
                        playInfo thisPlay = new playInfo();
                        thisPlay.devId = (Guid)row.Cells["devId"].Value;
                        thisPlay.fileName = row.Cells["fileName"].Value.ToString();
                        thisPlay.thisFlag = (PlayFlags)row.Cells["thisFlag"].Value;
                        AudioPlayer myPlayer = new AudioPlayer(thisPlay);
                        myPlayer.OnAudioPlay += new AudioPlayer.DefEventHandler(myPlayer_OnAudioPlay);
                        myPlayer.OnLoopingPaly += new EventHandler(myPlayer_OnLoopingPaly);
                        myPlayer.OnNormalPaly += new EventHandler(myPlayer_OnNormalPaly);
                        threadPlay = new Thread(new ThreadStart(myPlayer.Audio_Play));
                        threadPlay.Name = "player_" + i.ToString();

                        threadPlay.Start();
                        threadPlay.IsBackground = true;
                        i++;

                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        void myPlayer_OnAudioPlay(object sender,AudioEventArgs args)
        {
            playInfo myplay = (playInfo)args.AudioPlayInfo;
            string msg = myplay.devId.ToString() + "\r\n正在播放\r\n" + myplay.fileName + "\r\n";
            MessageBox.Show(msg);
        }



        void myPlayer_OnNormalPaly(object sender, EventArgs e)
        {
            MessageBox.Show("Normal");

        }

        void myPlayer_OnLoopingPaly(object sender, EventArgs e)
        {
            //播放一分钟后终止线程
            MessageBox.Show("Looping");
        }




        private void btn_File_Click(object sender, EventArgs e)//选择播放文件
        {
            OpenFileDialog filedg = new OpenFileDialog();
            filedg.Filter = "音视频文件(*.wav)|*.wav";
            if (filedg.ShowDialog() == DialogResult.OK)
            {
                if (filedg.FileName != "" || filedg.FileName != string.Empty)
                {
                    txt_File.Text = filedg.FileName;
                }
            }
        }

        private void cBox_Devices_SelectedIndexChanged(object sender, EventArgs e)//选择声卡
        {

        }




        private void radioButton1_CheckedChanged(object sender, EventArgs e)//选择默认播放
        {
            if (radioButton1.Checked)
            {
                thisFlags = PlayFlags.Default;
            }
        }

        private void radioButton2_CheckedChanged(object sender, EventArgs e)//选择循环播放
        {
            if (radioButton2.Checked)
            {
                thisFlags = PlayFlags.Looping;
            }
        }

        private void btn_add_Click(object sender, EventArgs e)//添加进列表
        {
            DataRow dr = dt.NewRow();
            dr["devId"] = ((KeyValuePair<Guid, string>)cBox_Devices.SelectedItem).Key;
            dr["fileName"] = txt_File.Text.Trim();
            dr["thisFlag"] = thisFlags;
            dt.Rows.Add(dr);
            dataGridView1.DataSource = dt;

        }

        private void btn_clear_Click(object sender, EventArgs e)//清除列表
        {
            dt.Rows.Clear();
            dataGridView1.DataSource = dt;
        }


    }
}

全文文档下载：/Files/xnxylf/调用DirectX进行简单的多媒体编程系列.doc

代码下载：/Files/xnxylf/QBAudioSolution.rar