audio_oss_source.h
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:2k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is MPEG4IP.
- *
- * The Initial Developer of the Original Code is Cisco Systems Inc.
- * Portions created by Cisco Systems Inc. are
- * Copyright (C) Cisco Systems Inc. 2000, 2001. All Rights Reserved.
- *
- * Contributor(s):
- * Dave Mackie dmackie@cisco.com
- * Bill May wmay@cisco.com
- */
- #ifndef __AUDIO_OSS_SOURCE_H__
- #define __AUDIO_OSS_SOURCE_H__
- #include <sys/types.h>
- #include <sys/ioctl.h>
- #include <linux/soundcard.h>
- #include "media_source.h"
- #include "audio_encoder.h"
- class COSSAudioSource : public CMediaSource {
- public:
- COSSAudioSource() : CMediaSource() {
- m_audioDevice = -1;
- m_pcmFrameBuffer = NULL;
- }
- ~COSSAudioSource() {
- free(m_pcmFrameBuffer);
- }
- bool IsDone() {
- return false; // live capture device is inexhaustible
- }
- float GetProgress() {
- return 0.0; // live capture device is inexhaustible
- }
- protected:
- int ThreadMain();
- void DoStartCapture();
- void DoStopCapture();
- bool Init();
- bool InitDevice();
- void ProcessAudio();
- protected:
- int m_audioDevice;
- u_int16_t m_maxPasses;
- Timestamp m_audioStartTimestamp;
- u_int8_t* m_pcmFrameBuffer;
- u_int32_t m_pcmFrameSize;
- };
- class CAudioCapabilities {
- public:
- CAudioCapabilities(char* deviceName) {
- m_deviceName = stralloc(deviceName);
- m_canOpen = false;
- m_numSamplingRates = 0;
- ProbeDevice();
- }
- ~CAudioCapabilities() {
- free(m_deviceName);
- }
- inline bool IsValid() {
- return m_canOpen;
- }
- public:
- char* m_deviceName;
- bool m_canOpen;
- // N.B. the rest of the fields are only valid
- // if m_canOpen is true
- char* m_driverName;
- u_int16_t m_numSamplingRates;
- u_int32_t m_samplingRates[16];
- protected:
- bool ProbeDevice(void);
- };
- #endif /* __AUDIO_OSS_SOURCE_H__ */