mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-08 10:31:05 +00:00
2f0cc8ec30
Original commit message from CVS: Moved from gst-plugins/ext/mplex/. See that directory for older changelogs.
144 lines
3.9 KiB
C++
144 lines
3.9 KiB
C++
|
||
/*
|
||
* inptstrm.c: Members of audi stream classes related to muxing out into
|
||
* the output 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 <assert.h>
|
||
#include "fastintfns.h"
|
||
#include "audiostrm.hh"
|
||
#include "outputstream.hh"
|
||
|
||
|
||
|
||
AudioStream::AudioStream (IBitStream & ibs, OutputStream & into):
|
||
ElementaryStream (ibs, into, ElementaryStream::audio), num_syncword (0)
|
||
{
|
||
FRAME_CHUNK = 24;
|
||
for (int i = 0; i < 2; ++i)
|
||
num_frames[i] = size_frames[i] = 0;
|
||
}
|
||
|
||
void
|
||
AudioStream::InitAUbuffer ()
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < aunits.BUF_SIZE; ++i)
|
||
aunits.init (new AAunit);
|
||
}
|
||
|
||
|
||
|
||
/*********************************
|
||
* Signals when audio stream has completed mux run-out specified
|
||
* in associated mux stream.
|
||
*********************************/
|
||
|
||
bool
|
||
AudioStream::RunOutComplete ()
|
||
{
|
||
return (au_unsent == 0 || (muxinto.running_out && RequiredPTS () >= muxinto.runout_PTS));
|
||
}
|
||
|
||
bool
|
||
AudioStream::AUBufferNeedsRefill ()
|
||
{
|
||
return
|
||
!eoscan
|
||
&& (aunits.current () + FRAME_CHUNK > last_buffered_AU
|
||
|| bs.buffered_bytes () < muxinto.sector_size);
|
||
}
|
||
|
||
/******************************************************************
|
||
Output_Audio
|
||
generates Pack/Sys Header/Packet information from the
|
||
audio stream and saves them into the sector
|
||
******************************************************************/
|
||
|
||
void
|
||
AudioStream::OutputSector ()
|
||
{
|
||
clockticks PTS;
|
||
unsigned int max_packet_data;
|
||
unsigned int actual_payload;
|
||
unsigned int old_au_then_new_payload;
|
||
|
||
PTS = RequiredDTS ();
|
||
old_au_then_new_payload = muxinto.PacketPayload (*this, buffers_in_header, false, false);
|
||
|
||
max_packet_data = 0;
|
||
if (muxinto.running_out && NextRequiredPTS () > muxinto.runout_PTS) {
|
||
/* We're now in the last AU of a segment. So we don't want to
|
||
go beyond it's end when writing sectors. Hence we limit
|
||
packet payload size to (remaining) AU length.
|
||
*/
|
||
max_packet_data = au_unsent;
|
||
}
|
||
|
||
/* CASE: packet starts with new access unit */
|
||
|
||
if (new_au_next_sec) {
|
||
actual_payload =
|
||
muxinto.WritePacket (max_packet_data, *this, buffers_in_header, PTS, 0, TIMESTAMPBITS_PTS);
|
||
|
||
}
|
||
|
||
|
||
/* CASE: packet starts with old access unit, no new one */
|
||
/* starts in this very same packet */
|
||
else if (!(new_au_next_sec) && (au_unsent >= old_au_then_new_payload)) {
|
||
actual_payload =
|
||
muxinto.WritePacket (max_packet_data, *this, buffers_in_header, 0, 0, TIMESTAMPBITS_NO);
|
||
}
|
||
|
||
|
||
/* CASE: packet starts with old access unit, a new one */
|
||
/* starts in this very same packet */
|
||
else { /* !(new_au_next_sec) && (au_unsent < old_au_then_new_payload)) */
|
||
|
||
/* is there another access unit anyway ? */
|
||
if (Lookahead () != 0) {
|
||
PTS = NextRequiredDTS ();
|
||
actual_payload =
|
||
muxinto.WritePacket (max_packet_data, *this, buffers_in_header, PTS, 0, TIMESTAMPBITS_PTS);
|
||
|
||
} else {
|
||
actual_payload = muxinto.WritePacket (0, *this, buffers_in_header, 0, 0, TIMESTAMPBITS_NO);
|
||
};
|
||
|
||
}
|
||
|
||
++nsec;
|
||
|
||
buffers_in_header = always_buffers_in_header;
|
||
|
||
}
|
||
|
||
|
||
|
||
/*
|
||
* Local variables:
|
||
* c-file-style: "stroustrup"
|
||
* tab-width: 4
|
||
* indent-tabs-mode: nil
|
||
* End:
|
||
*/
|