audio.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):
- * Bill May wmay@cisco.com
- */
- /*
- * audio.h - provides a class that interfaces between the codec and
- * the SDL audio application. Will provide for volume, buffering,
- * syncronization
- */
- #ifndef __AUDIO_H__
- #define __AUDIO_H__ 1
- #include "systems.h"
- #include <SDL.h>
- #include "codec_plugin.h"
- #define DECODE_BUFFERS_MAX 32
- class CPlayerSession;
- // states
- class CAudioSync {
- public:
- CAudioSync(CPlayerSession *psptr) {
- m_psptr = psptr;
- m_eof = 0;
- } ;
- virtual ~CAudioSync(void) {};
- // APIs from codec
- void clear_eof(void);
- void set_eof(void);
- int get_eof(void) { return m_eof; };
- // APIs from sync task
- virtual int initialize_audio(int have_video);
- virtual int is_audio_ready(uint64_t &disptime);
- virtual uint64_t check_audio_sync(uint64_t current_time, int &have_eof);
- virtual void play_audio(void);
- virtual void flush_sync_buffers(void);
- virtual void flush_decode_buffers(void);
- // Initialization, other APIs
- virtual void set_wait_sem(SDL_sem *p) {m_audio_waiting = p; } ;
- virtual void set_volume(int volume);
- protected:
- SDL_sem *m_audio_waiting;
- CPlayerSession *m_psptr;
- int m_eof;
- };
- CAudioSync *create_audio_sync(CPlayerSession *, int volume);
- audio_vft_t *get_audio_vft(void);
- int do_we_have_audio(void);
- #endif