VoiceEngine获取硬件信息

1. #include "webrtc\voice_engine\include\voe_base.h"
2. #include "webrtc\voice_engine\include\voe_hardware.h"
3. #include "webrtc\voice_engine\include\voe_errors.h"
4. VoiceEngine* pVoeEngine;
5. VoEHardware* pVoeHw;
6. VoEBase* pVoeBase ;
7. int main(int argc,char** argv)
8. {
9. pVoeEngine = VoiceEngine::Create();            // Get VoideEngine Factory

          pVoeBase = VoEBase::GetInterface(pVoeEngine);  // Use Voe Factor to get Voe Interface

1. pVoeBase->Init();       // Voe must init
2. pVoeHw = VoEHardware::GetInterface(pVoeEngine);
3. {
4. int res = 0 ;
5. int rd(0), pd(0);
6. res = pVoeHw->GetNumOfRecordingDevices(rd);
7. res = pVoeHw->GetNumOfPlayoutDevices(pd);
8. char dn[128] = { 0 };
9. char guid[128] = { 0 };
10. printf("\nPlayout devices (%d): \n", pd);
11. for (int j = 0; j < pd; ++j) {
12. res = pVoeHw->GetPlayoutDeviceName(j, dn, guid);
13. printf(" %d: %s \n", j, dn);
14. }
15. printf("Recording devices (%d): \n", rd);
16. for (int j = 0; j < rd; ++j) {
17. res = pVoeHw->GetRecordingDeviceName(j, dn, guid);
18. printf(" %d: %s \n", j, dn);
19. }
20. printf("Select playout device: ");
21. //ASSERT_EQ(1, scanf("%d", &pd));
22. res = pVoeHw->SetPlayoutDevice(pd);
23. printf("Select recording device: ");
24. //ASSERT_EQ(1, scanf("%d", &rd));
25. printf("Setting sound devices \n");
26. res = pVoeHw->SetRecordingDevice(rd);
27. }
28. }

VoiceEngine和VideoEngine一样， 使用Factory Model模式，Factory Model使用流程：
1.  创建VoiceEngine或者VideoEngine, 例如： VoiceEngine::Create() 
2.  获取Engine的Interface, VoEBase::GetInterface(), Engine Interface获取必须init();
3. 在factory下，有很多interface,都可以利用2中方法获取。
4.  使用完释放:    Terminate(),每个interface都要release();最后VoiceEngine::Delete( engine object);