audio.cpp
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:3k
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.cpp provides an interface (CAudioSync) between the codec and
- * the SDL audio APIs.
- */
- #include <stdlib.h>
- #include <string.h>
- #include "player_session.h"
- #include "audio.h"
- #include "player_util.h"
- //#define DEBUG_SYNC 1
- //#define DEBUG_AUDIO_FILL 1
- //#define DEBUG_DELAY 1
- #ifdef _WIN32
- DEFINE_MESSAGE_MACRO(audio_message, "audiosync")
- #else
- #define audio_message(loglevel, fmt...) message(loglevel, "audiosync", fmt)
- #endif
- void CAudioSync::set_eof(void)
- {
- audio_message(LOG_DEBUG, "Setting audio EOF");
- m_eof = 1;
- }
- void CAudioSync::clear_eof (void)
- {
- m_eof = 0;
- }
- // Sync task api - initialize the sucker.
- // May need to check out non-standard frequencies, see about conversion.
- // returns 0 for not yet, 1 for initialized, -1 for error
- int CAudioSync::initialize_audio (int have_video)
- {
- return (0);
- }
- // This is used by the sync thread to determine if a valid amount of
- // buffers are ready, and what time they start. It is used to determine
- // when we should start.
- int CAudioSync::is_audio_ready (uint64_t &disptime)
- {
- return (0);
- }
- // Used by the sync thread to see if resync is needed.
- // 0 - in sync. > 0 - sync time we need. -1 - need to do sync
- uint64_t CAudioSync::check_audio_sync (uint64_t current_time, int &have_eof)
- {
- return (0);
- }
- void CAudioSync::play_audio (void)
- {
- }
- // Called from the sync thread when we want to stop. Pause the audio,
- // and indicate that we're not to fill any more buffers - this should let
- // the decode thread get back to receive the pause message. Only called
- // when pausing - could cause m_dont_fill race conditions if called on play
- void CAudioSync::flush_sync_buffers (void)
- {
- }
- // this is called from the decode thread. It gets called on entry into pause,
- // and entry into play. This way, m_dont_fill race conditions are resolved.
- void CAudioSync::flush_decode_buffers (void)
- {
- }
- void CAudioSync::set_volume (int volume)
- {
- }
- /* end audio.cpp */