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AC3AudioStreamFramer.hh
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9 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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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 filter that breaks up an AC3 audio elementary stream into frames
19 // C++ header
20 
21 #ifndef _AC3_AUDIO_STREAM_FRAMER_HH
22 #define _AC3_AUDIO_STREAM_FRAMER_HH
23 
24 #ifndef _FRAMED_FILTER_HH
25 #include "FramedFilter.hh"
26 #endif
27 
29 public:
30  static AC3AudioStreamFramer*
32  unsigned char streamCode = 0);
33  // If "streamCode" != 0, then we assume that there's a 1-byte code at the beginning of each chunk of data that we read from
34  // our source. If that code is not the value we want, we discard the chunk of data.
35  // However, if "streamCode" == 0 (the default), then we don't expect this 1-byte code.
36 
37  unsigned samplingRate();
38 
39  void flushInput(); // called if there is a discontinuity (seeking) in the input
40 
41 private:
43  unsigned char streamCode);
44  // called only by createNew()
46 
47  static void handleNewData(void* clientData,
48  unsigned char* ptr, unsigned size,
49  struct timeval presentationTime);
50  void handleNewData(unsigned char* ptr, unsigned size);
51 
53 
54 private:
55  // redefined virtual functions:
56  virtual void doGetNextFrame();
57 
58 private:
59  struct timeval currentFramePlayTime() const;
60 
61 private:
62  struct timeval fNextFramePresentationTime;
63 
64 private: // parsing state
66  unsigned char fOurStreamCode;
67  friend class AC3AudioStreamParser; // hack
68 };
69 
70 #endif
AC3AudioStreamFramer(UsageEnvironment &env, FramedSource *inputSource, unsigned char streamCode)
struct timeval fNextFramePresentationTime
static AC3AudioStreamFramer * createNew(UsageEnvironment &env, FramedSource *inputSource, unsigned char streamCode=0)
class AC3AudioStreamParser * fParser
unsigned samplingRate()
struct timeval currentFramePlayTime() const
void handleNewData(unsigned char *ptr, unsigned size)
virtual ~AC3AudioStreamFramer()
static void handleNewData(void *clientData, unsigned char *ptr, unsigned size, struct timeval presentationTime)
virtual void doGetNextFrame()
FramedSource * inputSource() const
Definition: FramedFilter.hh:30