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-rw-r--r--ext/mplex/mpastrm_in.cc329
1 files changed, 0 insertions, 329 deletions
diff --git a/ext/mplex/mpastrm_in.cc b/ext/mplex/mpastrm_in.cc
deleted file mode 100644
index 0d085b87..00000000
--- a/ext/mplex/mpastrm_in.cc
+++ /dev/null
@@ -1,329 +0,0 @@
-/*
- * audiostrm_in.c: MPEG Audio strem class members handling scanning
- * and buffering raw 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.
- */
-
-#include <config.h>
-#include <math.h>
-#include <stdlib.h>
-
-#include "audiostrm.hh"
-#include "outputstream.hh"
-
-
-static const char *mpa_audio_version[4] = {
- "2.5",
- "2.0",
- "reserved",
- "1.0"
-};
-
-static const unsigned int mpa_bitrates_kbps[4][3][16] = {
- { /* MPEG audio V2.5 */
- {0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, 0},
- {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 0},
- {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 0}
- },
- { /*RESERVED*/ {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
- {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
- {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
- },
- { /* MPEG audio V2 */
- {0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, 0},
- {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 0},
- {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 0}
- },
- { /* MPEG audio V1 */
- {0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, 0},
- {0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, 0},
- {0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 0}
- }
-
-};
-
-
-static const int mpa_freq_table[4][4] = {
- /* MPEG audio V2.5 */
- {11025, 12000, 8000, 0},
- /* RESERVED */
- {0, 0, 0, 0},
- /* MPEG audio V2 */
- {22050, 24000, 16000, 0},
- /* MPEG audio V1 */
- {44100, 48000, 32000, 0}
-};
-
-static const char mpa_stereo_mode[4][15] =
- { "stereo", "joint stereo", "dual channel", "single channel" };
-static const char mpa_copyright_status[2][20] = { "no copyright", "copyright protected" };
-static const char mpa_original_bit[2][10] = { "copy", "original" };
-static const char mpa_emphasis_mode[4][20] =
- { "none", "50/15 microseconds", "reserved", "CCITT J.17" };
-static const unsigned int mpa_slots[4] = { 12, 144, 144, 0 };
-static const unsigned int mpa_samples[4] = { 384, 1152, 1152, 0 };
-
-
-
-MPAStream::MPAStream (IBitStream & ibs, OutputStream & into):
-AudioStream (ibs, into)
-{
-}
-
-bool
-MPAStream::Probe (IBitStream & bs)
-{
- return bs.getbits (11) == AUDIO_SYNCWORD;
-}
-
-
-/*************************************************************************
- *
- * Reads initial stream parameters and displays feedback banner to users
- *
- *************************************************************************/
-
-
-void
-MPAStream::Init (const int stream_num)
-{
- int padding_bit;
-
- MuxStream::Init (AUDIO_STR_0 + stream_num, 0, // Buffer scale
- muxinto.audio_buffer_size,
- muxinto.vcd_zero_stuffing,
- muxinto.buffers_in_audio, muxinto.always_buffers_in_audio);
- mjpeg_info ("Scanning for header info: Audio stream %02x", AUDIO_STR_0 + stream_num);
-
- InitAUbuffer ();
-
- /* A.Stevens 2000 - update to be compatible up to MPEG2.5
- */
- AU_start = bs.bitcount ();
- if (bs.getbits (11) == AUDIO_SYNCWORD) {
- num_syncword++;
- version_id = bs.getbits (2);
- layer = 3 - bs.getbits (2); /* 0..2 not 1..3!! */
- protection = bs.get1bit ();
- bit_rate_code = bs.getbits (4);
- frequency = bs.getbits (2);
- padding_bit = bs.get1bit ();
- bs.get1bit ();
- mode = bs.getbits (2);
- mode_extension = bs.getbits (2);
- copyright = bs.get1bit ();
- original_copy = bs.get1bit ();
- emphasis = bs.getbits (2);
-
- framesize =
- mpa_bitrates_kbps[version_id][layer][bit_rate_code] *
- mpa_slots[layer] * 1000 / mpa_freq_table[version_id][frequency];
-
- size_frames[0] = framesize;
- size_frames[1] = framesize + (layer == 0 ? 4 : 1);
- num_frames[padding_bit]++;
- access_unit.start = AU_start;
- access_unit.length = size_frames[padding_bit];
-
- samples_per_second = mpa_freq_table[version_id][frequency];
-
- /* Presentation time-stamping */
- access_unit.PTS = static_cast < clockticks > (decoding_order) *
- static_cast < clockticks > (mpa_samples[layer]) *
- 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 MPEG Audio stream header.");
- exit (1);
- }
-
-
- OutputHdrInfo ();
-}
-
-unsigned int
-MPAStream::NominalBitRate ()
-{
- return mpa_bitrates_kbps[version_id][layer][bit_rate_code] * 128;
-}
-
-
-unsigned int
-MPAStream::SizeFrame (int rate_code, int padding)
-{
- return mpa_bitrates_kbps[version_id][layer][rate_code] *
- mpa_slots[layer] * 1000 / mpa_freq_table[version_id][frequency] + padding;
-}
-
-void
-MPAStream::FillAUbuffer (unsigned int frames_to_buffer)
-{
- unsigned int i;
- unsigned int padding_bit;
-
- last_buffered_AU += frames_to_buffer;
-
- mjpeg_debug ("Scanning %d MPEG audio frames to frame %d", frames_to_buffer, last_buffered_AU);
-
- while (!bs.eos () &&
- decoding_order < last_buffered_AU) {
-
- skip = access_unit.length - 4;
- if (skip & 0x1)
- bs.getbits (8);
- if (skip & 0x2)
- bs.getbits (16);
- skip = skip >> 2;
-
- for (i = 0; i < skip; i++) {
- bs.getbits (32);
- }
- prev_offset = AU_start;
- AU_start = bs.bitcount ();
-
- /* Check we have reached the end of have another catenated
- stream to process before finishing ... */
- if ((syncword = bs.getbits (11)) != AUDIO_SYNCWORD) {
- if (!bs.eobs) {
- /* There appears to be another catenated stream... */
- int next;
-
- mjpeg_warn ("End of component bit-stream ... seeking next");
- /* Catenated stream must start on byte boundary */
- syncword = (syncword << (8 - AU_start % 8));
- next = bs.getbits (8 - (AU_start % 8));
- AU_start = bs.bitcount () - 11;
- syncword = syncword | next;
- if (syncword != AUDIO_SYNCWORD) {
- mjpeg_warn ("Failed to find start of next stream at %d prev %d !", (int) AU_start / 8,
- (int)prev_offset / 8);
- break;
- }
- } else
- /* No catenated stream... finished! */
- break;
- }
- // Skip version_id:2, layer:2, protection:1
- (void) bs.getbits (5);
- int rate_code = bs.getbits (4);
-
- // Skip frequency
- (void) bs.getbits (2);
-
- padding_bit = bs.get1bit ();
- access_unit.start = AU_start;
- access_unit.length = SizeFrame (rate_code, padding_bit);
- access_unit.PTS =
- static_cast < clockticks > (decoding_order) * static_cast < clockticks >
- (mpa_samples[layer]) * 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[padding_bit]++;
-
- bs.getbits (9);
-
- num_syncword++;
-
- if (num_syncword >= old_frames + 10) {
- mjpeg_debug ("Got %d frame headers.", num_syncword);
- old_frames = num_syncword;
-
- }
-
-
-
- }
- last_buffered_AU = decoding_order;
- eoscan = bs.eos ();
-
-}
-
-
-
-void
-MPAStream::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
-MPAStream::OutputHdrInfo ()
-{
- unsigned int bitrate;
-
- bitrate = mpa_bitrates_kbps[version_id][layer][bit_rate_code];
-
-
- mjpeg_info ("AUDIO STREAM:");
- mjpeg_info ("Audio version : %s", mpa_audio_version[version_id]);
- mjpeg_info ("Layer : %8u", layer + 1);
-
- if (protection == 0)
- mjpeg_info ("CRC checksums : yes");
- else
- mjpeg_info ("CRC checksums : no");
-
- if (bit_rate_code == 0)
- mjpeg_info ("Bit rate : free");
- else if (bit_rate_code == 0xf)
- mjpeg_info ("Bit rate : reserved");
- else
- mjpeg_info ("Bit rate : %8u bytes/sec (%3u kbit/sec)", bitrate * 128, bitrate);
-
- if (frequency == 3)
- mjpeg_info ("Frequency : reserved");
- else
- mjpeg_info ("Frequency : %d Hz", mpa_freq_table[version_id][frequency]);
-
- mjpeg_info ("Mode : %8u %s", mode, mpa_stereo_mode[mode]);
- mjpeg_info ("Mode extension : %8u", mode_extension);
- mjpeg_info ("Copyright bit : %8u %s", copyright, mpa_copyright_status[copyright]);
- mjpeg_info ("Original/Copy : %8u %s", original_copy, mpa_original_bit[original_copy]);
- mjpeg_info ("Emphasis : %8u %s", emphasis, mpa_emphasis_mode[emphasis]);
-}
-
-
-
-/*
- * Local variables:
- * c-file-style: "stroustrup"
- * tab-width: 4
- * indent-tabs-mode: nil
- * End:
- */
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