audio_dummy.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_dummy.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 CDummyAudioSync::set_config (int freq, int channels, int format,
- uint32_t max_buffer_size)
- {
- uint32_t max_bytes;
- m_freq = freq;
- m_chans = channels;
- m_format = format;
- m_max_sample_size = max_buffer_size;
- if (m_max_sample_size != 0) {
- max_bytes = m_chans * m_max_sample_size;
- if (m_format == AUDIO_U8 || m_format == AUDIO_S8) {
- } else {
- max_bytes *= 2;
- }
- m_buffer = (uint8_t *)malloc(max_bytes);
- } else {
- m_buffer = NULL;
- }
- }
- uint8_t *CDummyAudioSync::get_audio_buffer (void)
- {
- return m_buffer;
- }
- void CDummyAudioSync::filled_audio_buffer (uint64_t ts, int resync)
- {
- audio_message(LOG_DEBUG, "Filled audio buffer "LLU" resync %d",
- ts, resync);
- }
- uint32_t CDummyAudioSync::load_audio_buffer (uint8_t *from,
- uint32_t bytes,
- uint64_t ts,
- int resync)
- {
- audio_message(LOG_DEBUG, "Load audio buffer %d bytes at "LLU" resync %d",
- bytes, ts, resync);
- return bytes;
- }
- static void c_audio_config (void *ifptr, int freq,
- int chans, int format, uint32_t max_buffer_size)
- {
- ((CDummyAudioSync *)ifptr)->set_config(freq,
- chans,
- format,
- max_buffer_size);
- }
- static uint8_t *c_get_audio_buffer (void *ifptr)
- {
- return ((CDummyAudioSync *)ifptr)->get_audio_buffer();
- }
- static void c_filled_audio_buffer (void *ifptr,
- uint64_t ts,
- int resync_req)
- {
- ((CDummyAudioSync *)ifptr)->filled_audio_buffer(ts,
- resync_req);
- }
- static uint32_t c_load_audio_buffer (void *ifptr,
- uint8_t *from,
- uint32_t bytes,
- uint64_t ts,
- int resync)
- {
- return ((CDummyAudioSync *)ifptr)->load_audio_buffer(from,
- bytes,
- ts,
- resync);
- }
- static audio_vft_t audio_vft = {
- message,
- c_audio_config,
- c_get_audio_buffer,
- c_filled_audio_buffer,
- c_load_audio_buffer
- };
- CAudioSync *create_audio_sync (CPlayerSession *psptr, int volume)
- {
- return new CDummyAudioSync(psptr);
- }
- audio_vft_t *get_audio_vft (void)
- {
- return &audio_vft;
- }
- int do_we_have_audio (void)
- {
- return (1);
- }
- /* end audio.cpp */