Moved to gst-libs/ext/mplex

Original commit message from CVS:
Moved to gst-libs/ext/mplex

1 files changed, 0 insertions, 383 deletions

diff --git a/ext/mplex/ac3strm_in.cc b/ext/mplex/ac3strm_in.cc
deleted file mode 100644
index 806cffae..00000000
--- a/ext/mplex/ac3strm_in.cc
+++ /dev/null
@@ -1,383 +0,0 @@
-/*
- *  ac3strm_in.c: AC3 Audio strem class members handling scanning and
- *  buffering raw input stream.
- *
- *  Copyright (C) 2001 Andrew Stevens <andrew.stevens@philips.com>
- *  Copyright (C) 2000,2001 Brent Byeler for original header-structure
- *                          parsing code.
- *
- *
- *  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.
- */
-
-#include <config.h>
-#include <math.h>
-#include <stdlib.h>
-
-#include "audiostrm.hh"
-#include "outputstream.hh"
-#include <cassert>
-
-
-
-#define AC3_SYNCWORD            0x0b77
-#define AC3_PACKET_SAMPLES      1536
-
-/// table for the available AC3 bitrates
-static const unsigned int ac3_bitrate_index[32] = 
-{ 
-  32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192,
-  224, 256, 320, 384, 448, 512, 576, 640,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-static const unsigned int ac3_frame_size[3][32] = 
-{
-  {64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384,
-   448, 512, 640, 768, 896, 1024, 1152, 1280,
-   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
-  {69, 87, 104, 121, 139, 174, 208, 243, 278, 348, 417,
-   487, 557, 696, 835, 975, 1114, 1253, 1393,
-   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
-  {96, 120, 144, 168, 192, 240, 288, 336, 384, 480, 576,
-   672, 768, 960, 1152, 1344, 1536, 1728, 1920,
-   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
-};
-
-/// table for the available AC3 frequencies
-static const unsigned int ac3_frequency[4] = { 48000, 44100, 32000, 0 };
-
-
-AC3Stream::AC3Stream (IBitStream & ibs, OutputStream & into):
-AudioStream (ibs, into)
-{
-}
-
-bool
-AC3Stream::Probe (IBitStream & bs)
-{
-  return bs.getbits (16) == AC3_SYNCWORD;
-}
-
-
-/*************************************************************************
- *
- * Reads initial stream parameters and displays feedback banner to users
- * @param stream_num AC3 substream ID
- *************************************************************************/
-
-
-void
-AC3Stream::Init (const int stream_num)
-{
-  unsigned int framesize_code;
-
-  this->stream_num = stream_num;
-
-  MuxStream::Init (PRIVATE_STR_1, 1,	// Buffer scale
-		   default_buffer_size,
-		   muxinto.vcd_zero_stuffing,
-		   muxinto.buffers_in_audio, muxinto.always_buffers_in_audio);
-  mjpeg_info ("Scanning for header info: AC3 Audio stream %02x", stream_num);
-
-  InitAUbuffer ();
-  AU_start = bs.bitcount ();
-  if (bs.getbits (16) == AC3_SYNCWORD) {
-    num_syncword++;
-    bs.getbits (16);		// CRC field
-    frequency = bs.getbits (2);	// Sample rate code
-    framesize_code = bs.getbits (6);	// Frame size code
-    framesize = ac3_frame_size[frequency][framesize_code >> 1];
-    framesize = (framesize_code & 1) && frequency == 1 ? (framesize + 1) << 1 : (framesize << 1);
-
-
-    size_frames[0] = framesize;
-    size_frames[1] = framesize;
-    num_frames[0]++;
-    access_unit.start = AU_start;
-    access_unit.length = framesize;
-    bit_rate = ac3_bitrate_index[framesize_code >> 1];
-    samples_per_second = ac3_frequency[frequency];
-
-
-    /* Presentation time-stamping  */
-    access_unit.PTS = static_cast < clockticks > (decoding_order) *
-      static_cast < clockticks > (AC3_PACKET_SAMPLES) *
-      static_cast < clockticks > (CLOCKS) / samples_per_second;
-    access_unit.DTS = access_unit.PTS;
-    access_unit.dorder = decoding_order;
-    ++decoding_order;
-    aunits.append (access_unit);
-
-  } else {
-    mjpeg_error ("Invalid AC3 Audio stream header.");
-    exit (1);
-  }
-
-  OutputHdrInfo ();
-}
-
-/// @returns the current bitrate
-unsigned int
-AC3Stream::NominalBitRate ()
-{
-  return bit_rate;
-}
-
-/// Prefills the internal buffer for output multiplexing.
-/// @param frames_to_buffer the number of audio frames to read ahead
-void
-AC3Stream::FillAUbuffer (unsigned int frames_to_buffer)
-{
-  unsigned int framesize_code;
-
-  last_buffered_AU += frames_to_buffer;
-  mjpeg_debug ("Scanning %d MPEG audio frames to frame %d", frames_to_buffer, last_buffered_AU);
-
-  static int header_skip = 5;	// Initially skipped past  5 bytes of header 
-  int skip;
-  bool bad_last_frame = false;
-
-  while (!bs.eos () &&
-	 decoding_order < last_buffered_AU) {
-    skip = access_unit.length - header_skip;
-    if (skip & 0x1)
-      bs.getbits (8);
-    if (skip & 0x2)
-      bs.getbits (16);
-    skip = skip >> 2;
-
-    for (int i = 0; i < skip; i++) {
-      bs.getbits (32);
-    }
-
-    prev_offset = AU_start;
-    AU_start = bs.bitcount ();
-    if (AU_start - prev_offset != access_unit.length * 8) {
-      bad_last_frame = true;
-      break;
-    }
-
-    /* Check we have reached the end of have  another catenated 
-       stream to process before finishing ... */
-    if ((syncword = bs.getbits (16)) != AC3_SYNCWORD) {
-      if (!bs.eos ()) {
-	mjpeg_error_exit1 ("Can't find next AC3 frame - broken bit-stream?");
-      }
-      break;
-    }
-
-    bs.getbits (16);		// CRC field
-    bs.getbits (2);		// Sample rate code TOOD: check for change!
-    framesize_code = bs.getbits (6);
-    framesize = ac3_frame_size[frequency][framesize_code >> 1];
-    framesize = (framesize_code & 1) && frequency == 1 ? (framesize + 1) << 1 : (framesize << 1);
-
-    access_unit.start = AU_start;
-    access_unit.length = framesize;
-    access_unit.PTS = static_cast < clockticks > (decoding_order) *
-      static_cast < clockticks > (AC3_PACKET_SAMPLES) *
-      static_cast < clockticks > (CLOCKS) / samples_per_second;;
-    access_unit.DTS = access_unit.PTS;
-    access_unit.dorder = decoding_order;
-    decoding_order++;
-    aunits.append (access_unit);
-    num_frames[0]++;
-
-    num_syncword++;
-
-
-#ifdef DEBUG_AC3_HEADERS
-    /* Some stuff to generate frame-header information */
-    printf ("bsid       = %d\n", bs.getbits (5));
-    printf ("bsmode     = 0x%1x\n", bs.getbits (3));
-    int acmode = bs.getbits (3);
-
-    printf ("acmode     = 0x%1x\n", acmode);
-    if ((acmode & 0x1) && (acmode != 1))
-      printf ("cmixlev   = %d\n", bs.getbits (2));
-    if ((acmode & 0x4))
-      printf ("smixlev   = %d\n", bs.getbits (2));
-    if (acmode == 2)
-      printf ("dsurr     = %d\n", bs.getbits (2));
-    printf ("lfeon      = %d\n", bs.getbits (1));
-    printf ("dialnorm   = %02d\n", bs.getbits (5));
-    int compre = bs.getbits (1);
-
-    printf ("compre     = %d\n", compre);
-    if (compre)
-      printf ("compr    = %02d\n", bs.getbits (8));
-    int langcode = bs.getbits (1);
-
-    printf ("langcode     = %d\n", langcode);
-    if (langcode)
-      printf ("langcod  = 0x%02x\n", bs.getbits (8));
-
-    while (bs.bitcount () % 8 != 0)
-      bs.getbits (1);
-    header_skip = (bs.bitcount () - AU_start) / 8;
-#endif
-    if (num_syncword >= old_frames + 10) {
-      mjpeg_debug ("Got %d frame headers.", num_syncword);
-      old_frames = num_syncword;
-    }
-
-
-  }
-  if (bad_last_frame) {
-    mjpeg_error_exit1 ("Last AC3 frame ended prematurely!\n");
-  }
-  last_buffered_AU = decoding_order;
-  eoscan = bs.eos ();
-
-}
-
-
-/// Closes the AC3 stream and prints some statistics.
-void
-AC3Stream::Close ()
-{
-  stream_length = AU_start >> 3;
-  mjpeg_info ("AUDIO_STATISTICS: %02x", stream_id);
-  mjpeg_info ("Audio stream length %d bytes.", (int)stream_length);
-  mjpeg_info ("Syncwords      : %8u", num_syncword);
-  mjpeg_info ("Frames         : %8u padded", num_frames[0]);
-  mjpeg_info ("Frames         : %8u unpadded", num_frames[1]);
-
-  bs.close ();
-}
-
-/*************************************************************************
-	OutputAudioInfo
-	gibt gesammelte Informationen zu den Audio Access Units aus.
-
-	Prints information on audio access units
-*************************************************************************/
-
-void
-AC3Stream::OutputHdrInfo ()
-{
-  mjpeg_info ("AC3 AUDIO STREAM:");
-
-  mjpeg_info ("Bit rate       : %8u bytes/sec (%3u kbit/sec)", bit_rate * 128, bit_rate);
-
-  if (frequency == 3)
-    mjpeg_info ("Frequency      : reserved");
-  else
-    mjpeg_info ("Frequency      :     %d Hz", ac3_frequency[frequency]);
-
-}
-
-/**
-Reads the bytes neccessary to complete the current packet payload. 
-@param to_read number of bytes to read
-@param dst byte buffer pointer to read to 
-@returns the number of bytes read
- */
-unsigned int
-AC3Stream::ReadPacketPayload (uint8_t * dst, unsigned int to_read)
-{
-  static unsigned int aus = 0;
-  static unsigned int rd = 0;
-
-  unsigned int bytes_read = bs.read_buffered_bytes (dst + 4, to_read - 4);
-
-  rd += bytes_read;
-  clockticks decode_time;
-
-  unsigned int first_header = (new_au_next_sec || au_unsent > bytes_read)
-    ? 0 : au_unsent;
-
-  // BUG BUG BUG: how do we set the 1st header pointer if we have
-  // the *middle* part of a large frame?
-  assert (first_header <= to_read - 2);
-
-
-  unsigned int syncwords = 0;
-  unsigned int bytes_muxed = bytes_read;
-
-  if (bytes_muxed == 0 || MuxCompleted ()) {
-    goto completion;
-  }
-
-
-  /* Work through what's left of the current AU and the following AU's
-     updating the info until we reach a point where an AU had to be
-     split between packets.
-     NOTE: It *is* possible for this loop to iterate. 
-
-     The DTS/PTS field for the packet in this case would have been
-     given the that for the first AU to start in the packet.
-
-   */
-
-  decode_time = RequiredDTS ();
-  while (au_unsent < bytes_muxed) {
-    // BUG BUG BUG: if we ever had odd payload / packet size we might
-    // split an AC3 frame in the middle of the syncword!
-    assert (bytes_muxed > 1);
-    bufmodel.Queued (au_unsent, decode_time);
-    bytes_muxed -= au_unsent;
-    if (new_au_next_sec)
-      ++syncwords;
-    aus += au->length;
-    if (!NextAU ()) {
-      goto completion;
-    }
-    new_au_next_sec = true;
-    decode_time = RequiredDTS ();
-  };
-
-  // We've now reached a point where the current AU overran or
-  // fitted exactly.  We need to distinguish the latter case
-  // so we can record whether the next packet starts with an
-  // existing AU or not - info we need to decide what PTS/DTS
-  // info to write at the start of the next packet.
-
-  if (au_unsent > bytes_muxed) {
-    if (new_au_next_sec)
-      ++syncwords;
-    bufmodel.Queued (bytes_muxed, decode_time);
-    au_unsent -= bytes_muxed;
-    new_au_next_sec = false;
-  } else			//  if (au_unsent == bytes_muxed)
-  {
-    bufmodel.Queued (bytes_muxed, decode_time);
-    if (new_au_next_sec)
-      ++syncwords;
-    aus += au->length;
-    new_au_next_sec = NextAU ();
-  }
-completion:
-  // Generate the AC3 header...
-  // Note the index counts from the low byte of the offset so
-  // the smallest value is 1!
-
-  dst[0] = AC3_SUB_STR_0 + stream_num;
-  dst[1] = syncwords;
-  dst[2] = (first_header + 1) >> 8;
-  dst[3] = (first_header + 1) & 0xff;
-
-  return bytes_read + 4;
-}
-
-
-
-/* 
- * Local variables:
- *  c-file-style: "stroustrup"
- *  tab-width: 4
- *  indent-tabs-mode: nil
- * End:
- */