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Commit 94f4bb3b authored by Gildas Bazin's avatar Gildas Bazin
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* modules/demux/a52sys.c: forgot to remove this file.
* modules/audio_output/alsa.c: kind of a work-around for a strange bug that trashes the stack. Doesn't solve it but should be easier to track down now.
parent 4b59de99
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Showing with 6 additions and 338 deletions
modules/audio_output/alsa.c
View file @ 94f4bb3b
......@@ -2,7 +2,7 @@
* alsa.c : alsa plugin for vlc
*****************************************************************************
* Copyright (C) 2000-2001 VideoLAN
* $Id: alsa.c,v 1.39 2004/01/25 18:53:07 gbazin Exp $
* $Id: alsa.c,v 1.40 2004/02/20 19:21:23 gbazin Exp $
*
* Authors: Henri Fallon <henri@videolan.org> - Original Author
* Jeffrey Baker <jwbaker@acm.org> - Port to ALSA 1.0 API
......@@ -63,6 +63,8 @@ struct aout_sys_t
vlc_mutex_t lock;
vlc_cond_t wait ;
snd_pcm_status_t *p_status;
};
#define A52_FRAME_NB 1536
......@@ -282,6 +284,7 @@ static int Open( vlc_object_t *p_this )
}
p_sys->b_playing = VLC_FALSE;
p_sys->start_date = 0;
p_sys->p_status = (snd_pcm_status_t *)malloc(snd_pcm_status_sizeof());
vlc_cond_init( p_aout, &p_sys->wait );
vlc_mutex_init( p_aout, &p_sys->lock );
......@@ -644,6 +647,7 @@ static void Close( vlc_object_t *p_this )
snd_output_close( p_sys->p_snd_stderr );
#endif
free( p_sys->p_status );
free( p_sys );
}
......@@ -677,13 +681,11 @@ static void ALSAFill( aout_instance_t * p_aout )
struct aout_sys_t * p_sys = p_aout->output.p_sys;
aout_buffer_t * p_buffer;
snd_pcm_status_t * p_status;
snd_pcm_status_t * p_status = p_sys->p_status;
snd_timestamp_t ts_next;
int i_snd_rc;
mtime_t next_date;
snd_pcm_status_alloca( &p_status );
/* Fill in the buffer until space or audio output buffer shortage */
{
/* Get the status */
......
modules/demux/a52sys.c deleted 100644 → 0
View file @ 4b59de99
/*****************************************************************************
* a52.c : Raw A/52 Stream input module for vlc
*****************************************************************************
* Copyright (C) 2001-2003 VideoLAN
* $Id: a52sys.c,v 1.12 2004/01/25 20:05:28 hartman Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* 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
* (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.
*
* 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, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h> /* malloc(), free() */
#include <vlc/vlc.h>
#include <vlc/input.h>
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
vlc_module_begin();
set_description( _("A/52 demuxer" ) );
set_capability( "demux", 100 );
set_callbacks( Open, Close );
add_shortcut( "a52" );
vlc_module_end();
/* TODO:
*
*/
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Demux ( input_thread_t * );
struct demux_sys_t
{
mtime_t i_time;
es_out_id_t *p_es;
};
static inline int HeaderCheck( const uint8_t * p )
{
if( (p[0] != 0x0b) || (p[1] != 0x77) || /* syncword */
(p[5] >= 0x60) || /* bsid >= 12 */
(p[4] & 63) >= 38 || /* frmsizecod */
( (p[4] & 0xc0) != 0 && (p[4] & 0xc0) != 0x40 && (p[4] & 0xc0) != 0x80 ) )
{
return VLC_FALSE;
}
return VLC_TRUE;
}
static int HeaderInfo( const uint8_t * p,
int *pi_channels,
int *pi_sample_rate,
int *pi_frame_size );
/*****************************************************************************
* Open: initializes A52 demux structures
*****************************************************************************/
static int Open( vlc_object_t * p_this )
{
input_thread_t *p_input = (input_thread_t *)p_this;
demux_sys_t *p_sys;
int b_forced = VLC_FALSE;
uint8_t *p_peek;
module_t *p_id3;
es_format_t fmt;
if( p_input->psz_demux && !strncmp( p_input->psz_demux, "a52", 3 ) )
{
b_forced = VLC_TRUE;
}
if( p_input->psz_name )
{
int i_len = strlen( p_input->psz_name );
if( i_len > 4 && !strcasecmp( &p_input->psz_name[i_len - 4], ".a52" ) )
{
b_forced = VLC_TRUE;
}
}
/* skip possible id3 header */
p_id3 = module_Need( p_input, "id3", NULL );
if ( p_id3 )
{
module_Unneed( p_input, p_id3 );
}
/* see if it could be 52 */
if( !b_forced )
{
if( input_Peek( p_input, &p_peek, 6 ) < 6 )
{
msg_Err( p_input, "cannot peek" );
return VLC_EGENERIC;
}
if( !HeaderCheck( p_peek ) )
{
msg_Warn( p_input, "A52 module discarded" );
return VLC_EGENERIC;
}
}
p_input->pf_demux = Demux;
p_input->pf_demux_control = demux_vaControlDefault;
p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) );
p_sys->i_time = 0;
if( stream_Peek( p_input->s, &p_peek, 6 ) < 6 )
{
msg_Err( p_input, "cannot peek" );
goto error;
}
es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC( 'a', '5', '2', ' ' ) );
if( HeaderCheck( p_peek ) )
{
int i_frame_size;
HeaderInfo( p_peek, &fmt.audio.i_channels, &fmt.audio.i_rate, &i_frame_size );
msg_Dbg( p_input, "a52 channels=%d sample_rate=%d",
fmt.audio.i_channels, fmt.audio.i_rate );
}
vlc_mutex_lock( &p_input->stream.stream_lock );
if( input_InitStream( p_input, 0 ) == -1)
{
vlc_mutex_unlock( &p_input->stream.stream_lock );
msg_Err( p_input, "cannot init stream" );
goto error;
}
p_input->stream.i_mux_rate = 0 / 50;
vlc_mutex_unlock( &p_input->stream.stream_lock );
p_sys->p_es = es_out_Add( p_input->p_es_out, &fmt );
return VLC_SUCCESS;
error:
free( p_sys );
return VLC_EGENERIC;
}
/*****************************************************************************
* Demux: reads and demuxes data packets
*****************************************************************************
* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
*****************************************************************************/
static int Demux( input_thread_t * p_input )
{
demux_sys_t *p_sys = p_input->p_demux_data;
block_t *p_block;
int i_channels, i_sample_rate, i_frame_size;
uint8_t *p_peek;
if( stream_Peek( p_input->s, &p_peek, 6 ) < 6 )
{
msg_Warn( p_input, "cannot peek" );
return 0;
}
if( !HeaderCheck( p_peek ) )
{
/* we need to resynch */
vlc_bool_t b_ok = VLC_FALSE;
int i_skip = 0;
int i_peek;
i_peek = stream_Peek( p_input->s, &p_peek, 8096 );
if( i_peek < 8 )
{
msg_Warn( p_input, "cannot peek" );
return 0;
}
while( i_peek >= 8 )
{
if( HeaderCheck( p_peek ) )
{
b_ok = VLC_TRUE;
break;
}
p_peek++;
i_peek--;
i_skip++;
}
msg_Warn( p_input, "garbage=%d bytes", i_skip );
stream_Read( p_input->s, NULL, i_skip );
return 1;
}
HeaderInfo( p_peek, &i_channels, &i_sample_rate, &i_frame_size );
input_ClockManageRef( p_input,
p_input->stream.p_selected_program,
p_sys->i_time * 9 / 100 );
if( ( p_block = stream_Block( p_input->s, i_frame_size ) ) == NULL )
{
msg_Warn( p_input, "cannot read data" );
return 0;
}
p_block->i_dts =
p_block->i_pts = input_ClockGetTS( p_input,
p_input->stream.p_selected_program,
p_sys->i_time * 9 / 100 );
es_out_Send( p_input->p_es_out, p_sys->p_es, p_block );
p_sys->i_time += (mtime_t)1000000 *
(mtime_t)1536 /
(mtime_t)i_sample_rate;
return( 1 );
}
/*****************************************************************************
* Close: frees unused data
*****************************************************************************/
static void Close( vlc_object_t * p_this )
{
input_thread_t *p_input = (input_thread_t*)p_this;
demux_sys_t *p_sys = p_input->p_demux_data;
free( p_sys );
}
/*****************************************************************************
* SyncInfo: parse A/52 sync info
*****************************************************************************
* This code is borrowed from liba52 by Aaron Holtzman & Michel Lespinasse,
*****************************************************************************/
static int HeaderInfo( const uint8_t * p,
int *pi_channels,
int *pi_sample_rate,
int *pi_frame_size )
{
static const uint8_t halfrate[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3 };
static const int rate[] = { 32, 40, 48, 56, 64, 80, 96, 112,
128, 160, 192, 224, 256, 320, 384, 448,
512, 576, 640 };
static const uint8_t lfeon[8] = { 0x10, 0x10, 0x04, 0x04,
0x04, 0x01, 0x04, 0x01 };
int frmsizecod;
int bitrate;
int half;
int acmod;
if ((p[0] != 0x0b) || (p[1] != 0x77)) /* syncword */
return VLC_FALSE;
if (p[5] >= 0x60) /* bsid >= 12 */
return VLC_FALSE;
half = halfrate[p[5] >> 3];
/* acmod, dsurmod and lfeon */
acmod = p[6] >> 5;
if ( (p[6] & 0xf8) == 0x50 )
{
/* Dolby surround = stereo + Dolby */
*pi_channels = 2;
}
else
{
static const int acmod_to_channels[8] =
{
2 /* dual mono */, 1 /* mono */, 2 /* stereo */,
3 /* 3F */, 3 /* 2f1R */,
4 /* 3F1R */, 4, /* 2F2R */
5 /* 3F2R */
};
*pi_channels = acmod_to_channels[acmod];
}
if ( p[6] & lfeon[acmod] ) (*pi_channels)++; /* LFE */
frmsizecod = p[4] & 63;
if (frmsizecod >= 38)
return VLC_FALSE;
bitrate = rate[frmsizecod >> 1];
switch (p[4] & 0xc0) {
case 0:
*pi_sample_rate = 48000 >> half;
*pi_frame_size = 4 * bitrate;
return VLC_TRUE;
case 0x40:
*pi_sample_rate = 44100 >> half;
*pi_frame_size = 2 * (320 * bitrate / 147 + (frmsizecod & 1));
return VLC_TRUE;
case 0x80:
*pi_sample_rate = 32000 >> half;
*pi_frame_size =6 * bitrate;
return VLC_TRUE;
default:
return VLC_FALSE;
}
}
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