From 2f0cc8ec30e8c26fed7b2c9ac2614c9a7655fb65 Mon Sep 17 00:00:00 2001 From: David Schleef Date: Sat, 26 Jul 2003 03:01:58 +0000 Subject: Moved from gst-plugins/ext/mplex/. See that directory for older changelogs. Original commit message from CVS: Moved from gst-plugins/ext/mplex/. See that directory for older changelogs. --- gst-libs/ext/mplex/audiostrm.hh | 163 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 163 insertions(+) create mode 100644 gst-libs/ext/mplex/audiostrm.hh (limited to 'gst-libs/ext/mplex/audiostrm.hh') diff --git a/gst-libs/ext/mplex/audiostrm.hh b/gst-libs/ext/mplex/audiostrm.hh new file mode 100644 index 00000000..bc0167ac --- /dev/null +++ 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 + * + * + * 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: + */ -- cgit v1.2.1