* ac3_spdif.c: ac3 pass-through to external decoder with enabled soundcard
*****************************************************************************
* Copyright (C) 2001 VideoLAN
- * $Id: ac3_spdif.c,v 1.12 2001/09/30 20:25:13 bozo Exp $
+ * $Id: ac3_spdif.c,v 1.1 2001/11/13 12:09:17 henri Exp $
*
* Authors: Stéphane Borel <stef@via.ecp.fr>
* Juha Yrjola <jyrjola@cc.hut.fi>
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
+#define MODULE_NAME ac3_spdif
+#include "modules_inner.h"
+
/*****************************************************************************
* Preamble
*****************************************************************************/
#include "common.h"
#include "threads.h"
#include "mtime.h"
-
#include "intf_msg.h" /* intf_DbgMsg(), intf_ErrMsg() */
+#include "audio_output.h"
+
+#include "modules.h"
+#include "modules_export.h"
+
#include "stream_control.h"
#include "input_ext-dec.h"
-#include "audio_output.h"
-
#include "ac3_spdif.h"
#include "ac3_iec958.h"
/****************************************************************************
* Local Prototypes
****************************************************************************/
-static int InitThread ( ac3_spdif_thread_t * );
-static void RunThread ( ac3_spdif_thread_t * );
-static void ErrorThread ( ac3_spdif_thread_t * );
-static void EndThread ( ac3_spdif_thread_t * );
+static int ac3_spdif_Probe ( probedata_t * );
+static int ac3_spdif_Run ( decoder_config_t * );
+static int ac3_spdif_Init ( ac3_spdif_thread_t * );
+static void ac3_spdif_ErrorThread ( ac3_spdif_thread_t * );
+static void ac3_spdif_EndThread ( ac3_spdif_thread_t * );
static void BitstreamCallback( bit_stream_t *, boolean_t );
-/****************************************************************************
- * spdif_CreateThread: initialize the spdif thread
- ****************************************************************************/
-vlc_thread_t spdif_CreateThread( adec_config_t * p_config )
+/*****************************************************************************
+ * Capabilities
+ *****************************************************************************/
+void _M( adec_getfunctions )( function_list_t * p_function_list )
{
- ac3_spdif_thread_t * p_spdif;
-
- intf_DbgMsg( "spdif debug: creating ac3 pass-through thread" );
-
- /* Allocate the memory needed to store the thread's structure */
- p_spdif = malloc( sizeof(ac3_spdif_thread_t) );
-
- if( p_spdif == NULL )
- {
- intf_ErrMsg ( "spdif error: not enough memory "
- "for spdif_CreateThread() to create the new thread");
- return 0;
- }
-
- /* Temporary buffer to store ac3 frames to be transformed */
- p_spdif->p_ac3 = malloc( SPDIF_FRAME_SIZE );
-
- if( p_spdif->p_ac3 == NULL )
- {
- free( p_spdif->p_ac3 );
- return 0;
- }
-
- /*
- * Initialize the thread properties
- */
- p_spdif->p_config = p_config;
- p_spdif->p_fifo = p_config->decoder_config.p_decoder_fifo;
-
- p_spdif->p_aout_fifo = NULL;
-
- /* Spawn the ac3 to spdif thread */
- if (vlc_thread_create(&p_spdif->thread_id, "spdif",
- (vlc_thread_func_t)RunThread, (void *)p_spdif))
- {
- intf_ErrMsg( "spdif error: can't spawn spdif thread" );
- free( p_spdif->p_ac3 );
- free( p_spdif );
- return 0;
- }
-
- intf_DbgMsg( "spdif debug: spdif thread (%p) created", p_spdif );
-
- return p_spdif->thread_id;
+ p_function_list->pf_probe = ac3_spdif_Probe;
+ p_function_list->functions.dec.pf_RunThread = ac3_spdif_Run;
}
-/*
- * Local functions
- */
-
-/****************************************************************************
- * InitThread: initialize thread data and create output fifo
- ****************************************************************************/
-static int InitThread( ac3_spdif_thread_t * p_spdif )
-{
- boolean_t b_sync = 0;
-
- p_spdif->p_config->decoder_config.pf_init_bit_stream(
- &p_spdif->bit_stream,
- p_spdif->p_config->decoder_config.p_decoder_fifo,
- BitstreamCallback, (void*)p_spdif );
-
- /* Creating the audio output fifo */
- p_spdif->p_aout_fifo = aout_CreateFifo( AOUT_ADEC_SPDIF_FIFO, 1, 48000, 0,
- SPDIF_FRAME_SIZE, NULL );
-
- if( p_spdif->p_aout_fifo == NULL )
- {
- return -1;
- }
-
- intf_WarnMsg( 3, "spdif: aout fifo #%d created",
- p_spdif->p_aout_fifo->i_fifo );
-
- /* Sync word */
- p_spdif->p_ac3[0] = 0x0b;
- p_spdif->p_ac3[1] = 0x77;
-
- /* Find syncword */
- while( !b_sync )
- {
- while( GetBits( &p_spdif->bit_stream, 8 ) != 0x0b );
- p_spdif->i_real_pts = p_spdif->i_pts;
- p_spdif->i_pts = 0;
- b_sync = ( ShowBits( &p_spdif->bit_stream, 8 ) == 0x77 );
- }
- RemoveBits( &p_spdif->bit_stream, 8 );
-
- /* Check stream properties */
- if( ac3_iec958_parse_syncinfo( p_spdif ) < 0 )
- {
- intf_ErrMsg( "spdif error: stream not valid");
-
- aout_DestroyFifo( p_spdif->p_aout_fifo );
- return -1;
- }
+/*****************************************************************************
+ * Build configuration tree.
+ *****************************************************************************/
+MODULE_CONFIG_START
+ADD_WINDOW( "Configuration for ac3 spdif decoder module" )
+ ADD_COMMENT( "Nothing to configure" )
+MODULE_CONFIG_STOP
- /* Check that we can handle the rate
- * FIXME: we should check that we have the same rate for all fifos
- * but all rates should be supported by the decoder (32, 44.1, 48) */
- if( p_spdif->ac3_info.i_sample_rate != 48000 )
- {
- intf_ErrMsg( "spdif error: Only 48000 Hz streams supported");
+MODULE_INIT_START
+ p_module->i_capabilities = MODULE_CAPABILITY_DEC;
+ p_module->psz_longname = "Ac3 SPDIF decoder for AC3 pass-through";
+MODULE_INIT_STOP
- aout_DestroyFifo( p_spdif->p_aout_fifo );
- return -1;
- }
- p_spdif->p_aout_fifo->l_rate = p_spdif->ac3_info.i_sample_rate;
+MODULE_ACTIVATE_START
+ _M( adec_getfunctions )( &p_module->p_functions->dec );
+MODULE_ACTIVATE_STOP
- GetChunk( &p_spdif->bit_stream, p_spdif->p_ac3 + sizeof(sync_frame_t),
- p_spdif->ac3_info.i_frame_size - sizeof(sync_frame_t) );
+MODULE_DEACTIVATE_START
+MODULE_DEACTIVATE_STOP
- return 0;
+/*****************************************************************************
+ * ac3_spdif_Probe: probe the decoder and return score
+ *****************************************************************************
+ * Tries to launch a decoder and return score so that the interface is able
+ * to chose.
+ *****************************************************************************/
+static int ac3_spdif_Probe( probedata_t *p_data )
+{
+ if( main_GetIntVariable( AOUT_SPDIF_VAR, 0 ) &&
+ p_data->i_type == AC3_AUDIO_ES )
+ return( 100 );
+ else
+ return( 0 );
}
+
/****************************************************************************
- * RunThread: loop that reads ac3 ES and transform it to
- * an spdif compliant stream.
+ * ac3_spdif_Run: the whole thing
+ ****************************************************************************
+ * This function is called just after the thread is launched.
****************************************************************************/
-static void RunThread( ac3_spdif_thread_t * p_spdif )
+static int ac3_spdif_Run( decoder_config_t * p_config )
{
+ ac3_spdif_thread_t * p_spdif;
mtime_t i_frame_time;
boolean_t b_sync;
/* PTS of the current frame */
mtime_t i_current_pts = 0;
- /* Initializing the spdif decoder thread */
- if( InitThread( p_spdif ) )
+ intf_DbgMsg( "spdif debug: ac3_spdif thread created, initializing." );
+
+ /* Allocate the memory needed to store the thread's structure */
+ p_spdif = malloc( sizeof(ac3_spdif_thread_t) );
+
+ if( p_spdif == NULL )
+ {
+ intf_ErrMsg ( "spdif error: not enough memory "
+ "for spdif_CreateThread() to create the new thread");
+ return( -1 );
+ }
+
+ p_spdif->p_config = p_config;
+
+ if (ac3_spdif_Init( p_spdif ) )
{
- p_spdif->p_fifo->b_error = 1;
+ intf_ErrMsg( "spdif error: could not initialize thread" );
+ return( -1 );
}
/* Compute the theorical duration of an ac3 frame */
i_frame_time = 1000000 * AC3_FRAME_SIZE /
p_spdif->ac3_info.i_sample_rate;
+
+ intf_DbgMsg( "spdif debug: ac3_spdif thread (%p) initialized", p_spdif );
while( !p_spdif->p_fifo->b_die && !p_spdif->p_fifo->b_error )
{
/* If b_error is set, the ac3 spdif thread enters the error loop */
if( p_spdif->p_fifo->b_error )
{
- ErrorThread( p_spdif );
+ ac3_spdif_ErrorThread( p_spdif );
}
/* End of the ac3 decoder thread */
- EndThread( p_spdif );
+ ac3_spdif_EndThread( p_spdif );
+
+ return( 0 );
+}
+
+/****************************************************************************
+ * ac3_spdif_Init: initialize thread data and create output fifo
+ ****************************************************************************/
+static int ac3_spdif_Init( ac3_spdif_thread_t * p_spdif )
+{
+ boolean_t b_sync = 0;
+
+ /* Temporary buffer to store ac3 frames to be transformed */
+ p_spdif->p_ac3 = malloc( SPDIF_FRAME_SIZE );
+
+ if( p_spdif->p_ac3 == NULL )
+ {
+ free( p_spdif->p_ac3 );
+ return( -1 );
+ }
+
+ /*
+ * Initialize the thread properties
+ */
+ p_spdif->p_fifo = p_spdif->p_config->p_decoder_fifo;
+
+ p_spdif->p_config->pf_init_bit_stream(
+ &p_spdif->bit_stream,
+ p_spdif->p_config->p_decoder_fifo,
+ BitstreamCallback, (void*)p_spdif );
+
+ /* Creating the audio output fifo */
+ p_spdif->p_aout_fifo = aout_CreateFifo( AOUT_ADEC_SPDIF_FIFO, 1, 48000, 0,
+ SPDIF_FRAME_SIZE, NULL );
- return;
+ if( p_spdif->p_aout_fifo == NULL )
+ {
+ return( -1 );
+ }
+
+ intf_WarnMsg( 3, "spdif: aout fifo #%d created",
+ p_spdif->p_aout_fifo->i_fifo );
+
+ /* Sync word */
+ p_spdif->p_ac3[0] = 0x0b;
+ p_spdif->p_ac3[1] = 0x77;
+
+ /* Find syncword */
+ while( !b_sync )
+ {
+ while( GetBits( &p_spdif->bit_stream, 8 ) != 0x0b );
+ p_spdif->i_real_pts = p_spdif->i_pts;
+ p_spdif->i_pts = 0;
+ b_sync = ( ShowBits( &p_spdif->bit_stream, 8 ) == 0x77 );
+ }
+ RemoveBits( &p_spdif->bit_stream, 8 );
+
+ /* Check stream properties */
+ if( ac3_iec958_parse_syncinfo( p_spdif ) < 0 )
+ {
+ intf_ErrMsg( "spdif error: stream not valid");
+
+ aout_DestroyFifo( p_spdif->p_aout_fifo );
+ return( -1 );
+ }
+
+ /* Check that we can handle the rate
+ * FIXME: we should check that we have the same rate for all fifos
+ * but all rates should be supported by the decoder (32, 44.1, 48) */
+ if( p_spdif->ac3_info.i_sample_rate != 48000 )
+ {
+ intf_ErrMsg( "spdif error: Only 48000 Hz streams supported");
+
+ aout_DestroyFifo( p_spdif->p_aout_fifo );
+ return -1;
+ }
+ p_spdif->p_aout_fifo->l_rate = p_spdif->ac3_info.i_sample_rate;
+
+ GetChunk( &p_spdif->bit_stream, p_spdif->p_ac3 + sizeof(sync_frame_t),
+ p_spdif->ac3_info.i_frame_size - sizeof(sync_frame_t) );
+
+ return( 0 );
}
+
/*****************************************************************************
- * ErrorThread : ac3 spdif's RunThread() error loop
+ * ac3_spdif_ErrorThread : ac3 spdif's RunThread() error loop
*****************************************************************************/
-static void ErrorThread( ac3_spdif_thread_t * p_spdif )
+static void ac3_spdif_ErrorThread( ac3_spdif_thread_t * p_spdif )
{
/* We take the lock, because we are going to read/write the start/end
* indexes of the decoder fifo */
}
/*****************************************************************************
- * EndThread : ac3 spdif thread destruction
+ * ac3_spdif_EndThread : ac3 spdif thread destruction
*****************************************************************************/
-static void EndThread( ac3_spdif_thread_t * p_spdif )
+static void ac3_spdif_EndThread( ac3_spdif_thread_t * p_spdif )
{
intf_DbgMsg( "spdif debug: destroying thread %p", p_spdif );
free( p_spdif->p_config );
free( p_spdif->p_ac3 );
free( p_spdif );
-
+
intf_DbgMsg ("spdif debug: thread %p destroyed", p_spdif );
}
projects / vlc / blobdiff