/*****************************************************************************
* a52.c: parse A/52 audio sync info and packetize the stream
*****************************************************************************
- * Copyright (C) 2001-2002 the VideoLAN team
+ * Copyright (C) 2001-2002 VLC authors and VideoLAN
* $Id$
*
* Authors: Stéphane Borel <stef@via.ecp.fr>
* Christophe Massiot <massiot@via.ecp.fr>
* Gildas Bazin <gbazin@videolan.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* 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.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_codec.h>
-#include <vlc_aout.h>
#include <vlc_block_helper.h>
+#include <vlc_modules.h>
#include "a52.h"
+#include "../packetizer/packetizer_helper.h"
+
/*****************************************************************************
* Module descriptor
*****************************************************************************/
/*
* Common properties
*/
- audio_date_t end_date;
+ date_t end_date;
mtime_t i_pts;
vlc_a52_header_t frame;
};
-enum {
-
- STATE_NOSYNC,
- STATE_SYNC,
- STATE_HEADER,
- STATE_NEXT_SYNC,
- STATE_GET_DATA,
- STATE_SEND_DATA
-};
-
/****************************************************************************
* Local prototypes
****************************************************************************/
-static void *DecodeBlock ( decoder_t *, block_t ** );
+static block_t *DecodeBlock ( decoder_t *, block_t ** );
-static uint8_t *GetOutBuffer ( decoder_t *, void ** );
-static aout_buffer_t *GetAoutBuffer( decoder_t * );
-static block_t *GetSoutBuffer( decoder_t * );
+static uint8_t *GetOutBuffer ( decoder_t *, block_t ** );
+static block_t *GetAoutBuffer( decoder_t * );
+static block_t *GetSoutBuffer( decoder_t * );
/*****************************************************************************
* OpenCommon: probe the decoder/packetizer and return score
/* Misc init */
p_sys->b_packetizer = b_packetizer;
p_sys->i_state = STATE_NOSYNC;
- aout_DateSet( &p_sys->end_date, 0 );
+ date_Set( &p_sys->end_date, 0 );
+ p_sys->i_pts = VLC_TS_INVALID;
- p_sys->bytestream = block_BytestreamInit();
+ block_BytestreamInit( &p_sys->bytestream );
/* Set output properties */
p_dec->fmt_out.i_cat = AUDIO_ES;
/* Set callback */
if( b_packetizer )
- p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
- DecodeBlock;
+ p_dec->pf_packetize = DecodeBlock;
else
- p_dec->pf_decode_audio = (aout_buffer_t *(*)(decoder_t *, block_t **))
- DecodeBlock;
+ p_dec->pf_decode_audio = DecodeBlock;
return VLC_SUCCESS;
}
static int OpenDecoder( vlc_object_t *p_this )
{
+ /* HACK: Don't use this codec if we don't have an a52 audio filter */
+ if( !module_exists( "a52tofloat32" ) )
+ return VLC_EGENERIC;
return OpenCommon( p_this, false );
}
****************************************************************************
* This function is called just after the thread is launched.
****************************************************************************/
-static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
+static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
uint8_t p_header[VLC_A52_HEADER_SIZE];
uint8_t *p_buf;
- void *p_out_buffer;
+ block_t *p_out_buffer;
if( !pp_block || !*pp_block ) return NULL;
p_sys->i_state = STATE_NOSYNC;
block_BytestreamEmpty( &p_sys->bytestream );
}
- aout_DateSet( &p_sys->end_date, 0 );
+ date_Set( &p_sys->end_date, 0 );
block_Release( *pp_block );
return NULL;
}
- if( !aout_DateGet( &p_sys->end_date ) && !(*pp_block)->i_pts )
+ if( !date_Get( &p_sys->end_date ) && (*pp_block)->i_pts <= VLC_TS_INVALID)
{
/* We've just started the stream, wait for the first PTS. */
block_Release( *pp_block );
case STATE_SYNC:
/* New frame, set the Presentation Time Stamp */
p_sys->i_pts = p_sys->bytestream.p_block->i_pts;
- if( p_sys->i_pts != 0 &&
- p_sys->i_pts != aout_DateGet( &p_sys->end_date ) )
+ if( p_sys->i_pts > VLC_TS_INVALID &&
+ p_sys->i_pts != date_Get( &p_sys->end_date ) )
{
- aout_DateSet( &p_sys->end_date, p_sys->i_pts );
+ date_Set( &p_sys->end_date, p_sys->i_pts );
}
p_sys->i_state = STATE_HEADER;
/* Copy the whole frame into the buffer. When we reach this point
* we already know we have enough data available. */
- block_GetBytes( &p_sys->bytestream, p_buf, p_sys->frame.i_size );
+ block_GetBytes( &p_sys->bytestream,
+ p_buf, __MIN( p_sys->frame.i_size, p_out_buffer->i_buffer ) );
/* Make sure we don't reuse the same pts twice */
if( p_sys->i_pts == p_sys->bytestream.p_block->i_pts )
- p_sys->i_pts = p_sys->bytestream.p_block->i_pts = 0;
+ p_sys->i_pts = p_sys->bytestream.p_block->i_pts = VLC_TS_INVALID;
/* So p_block doesn't get re-added several times */
*pp_block = block_BytestreamPop( &p_sys->bytestream );
return p_out_buffer;
}
}
-
- return NULL;
}
/*****************************************************************************
/*****************************************************************************
* GetOutBuffer:
*****************************************************************************/
-static uint8_t *GetOutBuffer( decoder_t *p_dec, void **pp_out_buffer )
+static uint8_t *GetOutBuffer( decoder_t *p_dec, block_t **pp_out_buffer )
{
decoder_sys_t *p_sys = p_dec->p_sys;
uint8_t *p_buf;
if( p_dec->fmt_out.audio.i_rate != p_sys->frame.i_rate )
{
- msg_Info( p_dec, "A/52 channels:%d samplerate:%d bitrate:%d",
- p_sys->frame.i_channels, p_sys->frame.i_rate, p_sys->frame.i_bitrate );
+ msg_Dbg( p_dec, "A/52 channels:%d samplerate:%d bitrate:%d",
+ p_sys->frame.i_channels, p_sys->frame.i_rate, p_sys->frame.i_bitrate );
- aout_DateInit( &p_sys->end_date, p_sys->frame.i_rate );
- aout_DateSet( &p_sys->end_date, p_sys->i_pts );
+ date_Init( &p_sys->end_date, p_sys->frame.i_rate, 1 );
+ date_Set( &p_sys->end_date, p_sys->i_pts );
}
p_dec->fmt_out.audio.i_rate = p_sys->frame.i_rate;
}
else
{
- aout_buffer_t *p_aout_buffer = GetAoutBuffer( p_dec );
+ block_t *p_aout_buffer = GetAoutBuffer( p_dec );
p_buf = p_aout_buffer ? p_aout_buffer->p_buffer : NULL;
*pp_out_buffer = p_aout_buffer;
}
/*****************************************************************************
* GetAoutBuffer:
*****************************************************************************/
-static aout_buffer_t *GetAoutBuffer( decoder_t *p_dec )
+static block_t *GetAoutBuffer( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
- aout_buffer_t *p_buf;
-
- p_buf = decoder_NewAudioBuffer( p_dec, p_sys->frame.i_samples );
- if( p_buf == NULL ) return NULL;
- p_buf->start_date = aout_DateGet( &p_sys->end_date );
- p_buf->end_date = aout_DateIncrement( &p_sys->end_date, p_sys->frame.i_samples );
+ block_t *p_buf = decoder_NewAudioBuffer( p_dec, p_sys->frame.i_samples );
+ if( p_buf )
+ {
+ p_buf->i_pts = date_Get( &p_sys->end_date );
+ p_buf->i_length = date_Increment( &p_sys->end_date,
+ p_sys->frame.i_samples ) - p_buf->i_pts;
+ }
return p_buf;
}
static block_t *GetSoutBuffer( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
- block_t *p_block;
-
- p_block = block_New( p_dec, p_sys->frame.i_size );
- if( p_block == NULL ) return NULL;
- p_block->i_pts = p_block->i_dts = aout_DateGet( &p_sys->end_date );
-
- p_block->i_length =
- aout_DateIncrement( &p_sys->end_date, p_sys->frame.i_samples ) - p_block->i_pts;
+ block_t *p_block = block_Alloc( p_sys->frame.i_size );
+ if( p_block )
+ {
+ p_block->i_pts = p_block->i_dts = date_Get( &p_sys->end_date );
+ p_block->i_length =
+ date_Increment( &p_sys->end_date, p_sys->frame.i_samples ) - p_block->i_pts;
+ }
return p_block;
}
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