qtime_bytestream.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:4k
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
- */
- /*
- * qtime_bytestream.h - provides bytestream access to quicktime files
- */
- #ifndef __QTIME_BYTESTREAM_H__
- #define __QTIME_BYTESTREAM_H__
- #include <mp4/quicktime.h>
- #include "our_bytestream.h"
- #include "qtime_file.h"
- /*
- * CQTByteStreamBase provides base class access to quicktime files.
- * Most functions are shared between audio and video.
- */
- class CQTByteStreamBase : public COurInByteStream
- {
- public:
- CQTByteStreamBase(CQtimeFile *parent,
- int track,
- const char *name);
- ~CQTByteStreamBase();
- int eof(void);
- virtual void reset(void) = 0;
- virtual uint64_t start_next_frame (uint8_t **buffer,
- uint32_t *buflen,
- void **ud) = 0;
- void used_bytes_for_frame(uint32_t bytes);
- void check_for_end_of_frame(void);
- protected:
- virtual void read_frame(uint32_t frame) = 0;
- CQtimeFile *m_parent;
- int m_eof;
- int m_track;
- uint32_t m_frame_on;
- uint32_t m_frames_max;
- uint32_t m_frame_rate;
- uint32_t m_max_frame_size;
- uint32_t m_frame_in_buffer;
- uint8_t *m_buffer;
- uint32_t m_byte_on;
- uint32_t m_this_frame_size;
- uint64_t m_total;
- };
- /*
- * CQTVideoByteStream is for video streams. It is inherited from
- * CQTByteStreamBase.
- */
- class CQTVideoByteStream : public CQTByteStreamBase
- {
- public:
- CQTVideoByteStream(CQtimeFile *parent,
- int track) :
- CQTByteStreamBase(parent, track, "video")
- {
- read_frame(0);
- };
- void reset(void);
- uint64_t start_next_frame(uint8_t **buffer,
- uint32_t *buflen, void **ud);
- int can_skip_frame(void) { return 1; };
- int skip_next_frame (uint64_t *ts, int *hasSync, uint8_t **buffer,
- uint32_t *buflen);
- void set_start_time(uint64_t start);
- double get_max_playtime(void);
- void config(long num_frames, float frate, int time_scale);
- protected:
- void read_frame(uint32_t frame);
- private:
- void video_set_timebase(long frame);
- int m_time_scale;
- double m_max_time;
- };
- /*
- * CQTAudioByteStream is for audio streams. It is inherited from
- * CQTByteStreamBase.
- */
- class CQTAudioByteStream : public CQTByteStreamBase
- {
- public:
- CQTAudioByteStream(CQtimeFile *parent,
- int track) :
- CQTByteStreamBase(parent, track, "audio")
- {
- read_frame(0);
- };
- void reset(void);
- uint64_t start_next_frame(uint8_t **buffer,
- uint32_t *buflen,
- void **ud);
- void set_start_time(uint64_t start);
- double get_max_playtime (void) {
- double ret = m_frames_max * m_samples_per_frame;
- ret /= m_frame_rate;
- return (ret);
- };
- void config(long num_frames, uint32_t frate, int duration) {
- m_frames_max = num_frames;
- m_frame_rate = frate;
- m_samples_per_frame = duration;
- };
- protected:
- void read_frame(uint32_t frame);
- private:
- void audio_set_timebase(long frame);
- int m_samples_per_frame;
- };
- #endif