1 files changed, 163 insertions, 0 deletions
diff --git a/gst-libs/ext/mplex/audiostrm.hh b/gst-libs/ext/mplex/audiostrm.hh
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+++ b/gst-libs/ext/mplex/audiostrm.hh
@@ -0,0 +1,163 @@
+
+/*
+ *  inptstrm.hh:  Input stream classes for MPEG multiplexing
+ *  TODO: Split into the base classes and the different types of
+ *  actual input stream.
+ *
+ *  Copyright (C) 2001 Andrew Stevens <andrew.stevens@philips.com>
+ *
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of version 2 of the GNU General Public License
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifndef __AUDIOSTRM_H__
+#define __AUDIOSTRM_H__
+
+#include "inputstrm.hh"
+
+class AudioStream:public ElementaryStream
+{
+public:
+  AudioStream (IBitStream & ibs, OutputStream & into);
+  virtual void Init (const int stream_num) = 0;
+  virtual void Close () = 0;
+
+  void OutputSector ();
+  bool RunOutComplete ();
+  virtual unsigned int NominalBitRate () = 0;
+
+  unsigned int num_syncword;
+  unsigned int num_frames[2];
+  unsigned int size_frames[2];
+  unsigned int version_id;
+  unsigned int layer;
+  unsigned int protection;
+  unsigned int bit_rate_code;
+  unsigned int frequency;
+  unsigned int mode;
+  unsigned int mode_extension;
+  unsigned int copyright;
+  unsigned int original_copy;
+  unsigned int emphasis;
+
+protected:
+    virtual bool AUBufferNeedsRefill ();
+  virtual void FillAUbuffer (unsigned int frames_to_buffer) = 0;
+  void InitAUbuffer ();
+
+  /* State variables for scanning source bit-stream */
+  unsigned int framesize;
+  unsigned int skip;
+  unsigned int samples_per_second;
+  unsigned long long int length_sum;
+  AAunit access_unit;
+};
+
+class MPAStream:public AudioStream
+{
+public:
+  MPAStream (IBitStream & ibs, OutputStream & into);
+  virtual void Init (const int stream_num);
+  static bool Probe (IBitStream & bs);
+  virtual void Close ();
+  virtual unsigned int NominalBitRate ();
+
+
+private:
+  void OutputHdrInfo ();
+  unsigned int SizeFrame (int bit_rate, int padding_bit);
+  virtual void FillAUbuffer (unsigned int frames_to_buffer);
+
+
+  /* State variables for scanning source bit-stream */
+  unsigned int framesize;
+  unsigned int skip;
+  unsigned int samples_per_second;
+};
+
+
+
+class AC3Stream:public AudioStream
+{
+public:
+  AC3Stream (IBitStream & ibs, OutputStream & into);
+  virtual void Init (const int stream_num);
+  static bool Probe (IBitStream & bs);
+  virtual void Close ();
+  virtual unsigned int NominalBitRate ();
+
+  virtual unsigned int ReadPacketPayload (uint8_t * dst, unsigned int to_read);
+  virtual unsigned int StreamHeaderSize ()
+  {
+    return 4;
+  }
+
+
+private:
+  void OutputHdrInfo ();
+  virtual void FillAUbuffer (unsigned int frames_to_buffer);
+
+  static const unsigned int default_buffer_size = 16 * 1024;
+
+  /* State variables for scanning source bit-stream */
+  unsigned int framesize;
+  unsigned int samples_per_second;
+  unsigned int bit_rate;
+  unsigned int stream_num;
+};
+
+class LPCMStream:public AudioStream
+{
+public:
+  LPCMStream (IBitStream & ibs, OutputStream & into);
+  virtual void Init (const int stream_num);
+  static bool Probe (IBitStream & bs);
+  virtual void Close ();
+  virtual unsigned int NominalBitRate ();
+
+  virtual unsigned int ReadPacketPayload (uint8_t * dst, unsigned int to_read);
+  virtual unsigned int StreamHeaderSize ()
+  {
+    return 7;
+  }
+
+
+private:
+  void OutputHdrInfo ();
+  virtual void FillAUbuffer (unsigned int frames_to_buffer);
+
+  static const unsigned int default_buffer_size = 232 * 1024;
+  static const unsigned int ticks_per_frame_90kHz = 150;
+
+  /* State variables for scanning source bit-stream */
+  unsigned int stream_num;
+  unsigned int samples_per_second;
+  unsigned int channels;
+  unsigned int bits_per_sample;
+  unsigned int bytes_per_frame;
+  unsigned int frame_index;
+  unsigned int dynamic_range_code;
+};
+
+
+#endif // __AUDIOSTRM_H__
+
+
+/* 
+ * Local variables:
+ *  c-file-style: "stroustrup"
+ *  tab-width: 4
+ *  indent-tabs-mode: nil
+ * End:
+ */