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MPEG4VideoStreamDiscreteFramer.hh
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2 This library is free software; you can redistribute it and/or modify it under
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9 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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12 You should have received a copy of the GNU Lesser General Public License
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14 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
15 **********/
16 // "liveMedia"
17 // Copyright (c) 1996-2021 Live Networks, Inc. All rights reserved.
18 // A simplified version of "MPEG4VideoStreamFramer" that takes only complete,
19 // discrete frames (rather than an arbitrary byte stream) as input.
20 // This avoids the parsing and data copying overhead of the full
21 // "MPEG4VideoStreamFramer".
22 // C++ header
23 
24 #ifndef _MPEG4_VIDEO_STREAM_DISCRETE_FRAMER_HH
25 #define _MPEG4_VIDEO_STREAM_DISCRETE_FRAMER_HH
26 
27 #ifndef _MPEG4_VIDEO_STREAM_FRAMER_HH
29 #endif
30 
32 public:
34  createNew(UsageEnvironment& env, FramedSource* inputSource, Boolean leavePresentationTimesUnmodified = False);
35 
36 protected:
38  FramedSource* inputSource, Boolean leavePresentationTimesUnmodified);
39  // called only by createNew()
41 
42 protected:
43  // redefined virtual functions:
44  virtual void doGetNextFrame();
45 
46 protected:
47  static void afterGettingFrame(void* clientData, unsigned frameSize,
48  unsigned numTruncatedBytes,
49  struct timeval presentationTime,
50  unsigned durationInMicroseconds);
51  void afterGettingFrame1(unsigned frameSize,
52  unsigned numTruncatedBytes,
53  struct timeval presentationTime,
54  unsigned durationInMicroseconds);
55 
56  Boolean getNextFrameBit(u_int8_t& result);
57  Boolean getNextFrameBits(unsigned numBits, u_int32_t& result);
58  // Which are used by:
60 
61 protected:
64  unsigned fNumVTIRBits;
65  // # of bits needed to count to "vop_time_increment_resolution"
66  struct timeval fLastNonBFramePresentationTime;
68 
69 private:
70  unsigned fNumBitsSeenSoFar; // used by the getNextFrameBit*() routines
71 };
72 
73 #endif
const Boolean False
Definition: Boolean.hh:28
unsigned char Boolean
Definition: Boolean.hh:25
FramedSource * inputSource() const
Definition: FramedFilter.hh:30
static void afterGettingFrame(void *clientData, unsigned frameSize, unsigned numTruncatedBytes, struct timeval presentationTime, unsigned durationInMicroseconds)
static MPEG4VideoStreamDiscreteFramer * createNew(UsageEnvironment &env, FramedSource *inputSource, Boolean leavePresentationTimesUnmodified=False)
MPEG4VideoStreamDiscreteFramer(UsageEnvironment &env, FramedSource *inputSource, Boolean leavePresentationTimesUnmodified)
void afterGettingFrame1(unsigned frameSize, unsigned numTruncatedBytes, struct timeval presentationTime, unsigned durationInMicroseconds)
Boolean getNextFrameBits(unsigned numBits, u_int32_t &result)
Boolean getNextFrameBit(u_int8_t &result)