* input_ps.c: PS demux and packet management
*****************************************************************************
* Copyright (C) 1998, 1999, 2000 VideoLAN
- * $Id: input_ps.c,v 1.14 2001/04/13 05:36:12 stef Exp $
+ * $Id: input_ps.c,v 1.15 2001/04/16 12:34:28 asmax Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Cyril Deguet <asmax@via.ecp.fr>
static void PSInit( input_thread_t * p_input )
{
thread_ps_data_t * p_method;
+ packet_cache_t * p_packet_cache;
if( (p_method =
(thread_ps_data_t *)malloc( sizeof(thread_ps_data_t) )) == NULL )
p_input->b_error = 1;
return;
}
-
p_input->p_plugin_data = (void *)p_method;
- p_input->p_method_data = NULL;
-
+
+ /* creates the packet cache structure */
+ p_packet_cache = malloc( sizeof(packet_cache_t) );
+ if ( p_packet_cache == NULL )
+ {
+ intf_ErrMsg( "Out of memory" );
+ p_input->b_error = 1;
+ return;
+ }
+ p_input->p_method_data = (void *)p_packet_cache;
+
+ /* allocates the data cache */
+ p_packet_cache->data.p_stack = malloc( DATA_CACHE_SIZE *
+ sizeof(data_packet_t*) );
+ if ( p_packet_cache->data.p_stack == NULL )
+ {
+ intf_ErrMsg( "Out of memory" );
+ p_input->b_error = 1;
+ return;
+ }
+ p_packet_cache->data.l_index = 0;
+
+ /* allocates the PES cache */
+ p_packet_cache->pes.p_stack = malloc( PES_CACHE_SIZE *
+ sizeof(pes_packet_t*) );
+ if ( p_packet_cache->pes.p_stack == NULL )
+ {
+ intf_ErrMsg( "Out of memory" );
+ p_input->b_error = 1;
+ return;
+ }
+ p_packet_cache->pes.l_index = 0;
+
+ /* allocates the small buffer cache */
+ p_packet_cache->small.p_stack = malloc( SMALL_CACHE_SIZE *
+ sizeof(packet_buffer_t) );
+ if ( p_packet_cache->small.p_stack == NULL )
+ {
+ intf_ErrMsg( "Out of memory" );
+ p_input->b_error = 1;
+ return;
+ }
+ p_packet_cache->small.l_index = 0;
+
+ /* allocates the large buffer cache */
+ p_packet_cache->large.p_stack = malloc( LARGE_CACHE_SIZE *
+ sizeof(packet_buffer_t) );
+ if ( p_packet_cache->large.p_stack == NULL )
+ {
+ intf_ErrMsg( "Out of memory" );
+ p_input->b_error = 1;
+ return;
+ }
+ p_packet_cache->large.l_index = 0;
+
/* Re-open the socket as a buffered FILE stream */
if( (p_method->stream = fdopen( p_input->i_handle, "r" )) == NULL )
{
}
rewind( p_method->stream );
vlc_mutex_lock( &p_input->stream.stream_lock );
-
- /* file input method */
- p_input->stream.i_method = INPUT_METHOD_FILE;
-
p_input->stream.p_selected_area->i_tell = 0;
if( p_demux_data->b_has_PSM )
{
{
/* The programs will be added when we read them. */
vlc_mutex_lock( &p_input->stream.stream_lock );
-
- /* file input method */
- p_input->stream.i_method = INPUT_METHOD_FILE;
-
p_input->stream.pp_programs[0]->b_is_ok = 0;
vlc_mutex_unlock( &p_input->stream.stream_lock );
}
}
/* Fetch a packet of the appropriate size. */
- if( (p_data = NewPacket( p_input, i_packet_size + 6 )) == NULL )
+ if( (p_data = NewPacket( p_input->p_method_data, i_packet_size + 6 ))
+ == NULL )
{
intf_ErrMsg( "Out of memory" );
return( -1 );
/*****************************************************************************
* NewPacket: allocates a data packet
*****************************************************************************/
-static struct data_packet_s * NewPacket( void * p_garbage,
- size_t i_size )
-{
- data_packet_t * p_data;
-
- /* Safety check */
- if( i_size > INPUT_MAX_PACKET_SIZE )
+static struct data_packet_s * NewPacket( void * p_packet_cache,
+ size_t l_size )
+{
+ packet_cache_t * p_cache;
+ data_packet_t * p_data;
+ long l_index;
+
+ if ( (p_cache = (packet_cache_t *)p_packet_cache) == NULL )
{
- intf_ErrMsg( "Packet too big (%d)", i_size );
+ intf_ErrMsg( "PPacket cache not initialized" );
return NULL;
}
-
- if( (p_data = (data_packet_t *)malloc( sizeof(data_packet_t) )) == NULL )
+ /* Safety check */
+ if( l_size > INPUT_MAX_PACKET_SIZE )
{
- intf_DbgMsg( "Out of memory" );
+ intf_ErrMsg( "Packet too big (%d)", l_size );
return NULL;
}
- if( (p_data->p_buffer = (byte_t *)malloc( i_size )) == NULL )
+ /* Checks whether the data cache is empty */
+ if( p_cache->data.l_index == 0 )
{
- intf_DbgMsg( "Out of memory" );
- free( p_data );
- return NULL;
+ /* Allocates a new packet */
+ if ( (p_data = malloc( sizeof(data_packet_t) )) == NULL )
+ {
+ intf_DbgMsg( "Out of memory" );
+ return NULL;
+ }
+ intf_WarnMsg( 1, "PS input: data packet allocated" );
+ }
+ else
+ {
+ /* Takes the packet out from the cache */
+ if( (p_data = p_cache->data.p_stack[ -- p_cache->data.l_index ])
+ == NULL )
+ {
+ intf_DbgMsg( "NULL packet in the data cache" );
+ return NULL;
+ }
+ }
+
+ if( l_size < MAX_SMALL_SIZE )
+ {
+ /* Small buffer */
+
+ /* Checks whether the buffer cache is empty */
+ if( p_cache->small.l_index == 0 )
+ {
+ /* Allocates a new packet */
+ if ( (p_data->p_buffer = malloc( l_size )) == NULL )
+ {
+ intf_DbgMsg( "Out of memory" );
+ free( p_data );
+ return NULL;
+ }
+ intf_WarnMsg( 1, "PS input: small buffer allocated" );
+ p_data->l_size = l_size;
+ }
+ else
+ {
+ /* Takes the packet out from the cache */
+ l_index = -- p_cache->small.l_index;
+ if( (p_data->p_buffer = p_cache->small.p_stack[l_index].p_data)
+ == NULL )
+ {
+ intf_DbgMsg( "NULL packet in the small buffer cache" );
+ free( p_data );
+ return NULL;
+ }
+ /* Reallocates the packet if it is too small or too large */
+ if( p_cache->small.p_stack[l_index].l_size < l_size ||
+ p_cache->small.p_stack[l_index].l_size > 2*l_size )
+ {
+ p_data->p_buffer = realloc( p_data->p_buffer, l_size );
+ p_data->l_size = l_size;
+ }
+ else
+ {
+ p_data->l_size = p_cache->small.p_stack[l_index].l_size;
+ }
+ }
+ }
+ else
+ {
+ /* Large buffer */
+
+ /* Checks whether the buffer cache is empty */
+ if( p_cache->large.l_index == 0 )
+ {
+ /* Allocates a new packet */
+ if ( (p_data->p_buffer = malloc( l_size )) == NULL )
+ {
+ intf_DbgMsg( "Out of memory" );
+ free( p_data );
+ return NULL;
+ }
+ intf_WarnMsg( 1, "PS input: large buffer allocated" );
+ p_data->l_size = l_size;
+ }
+ else
+ {
+ /* Takes the packet out from the cache */
+ l_index = -- p_cache->large.l_index;
+ if( (p_data->p_buffer = p_cache->large.p_stack[l_index].p_data)
+ == NULL )
+ {
+ intf_DbgMsg( "NULL packet in the small buffer cache" );
+ free( p_data );
+ return NULL;
+ }
+ /* Reallocates the packet if it is too small or too large */
+ if( p_cache->large.p_stack[l_index].l_size < l_size ||
+ p_cache->large.p_stack[l_index].l_size > 2*l_size )
+ {
+ p_data->p_buffer = realloc( p_data->p_buffer, l_size );
+ p_data->l_size = l_size;
+ }
+ else
+ {
+ p_data->l_size = p_cache->large.p_stack[l_index].l_size;
+ }
+ }
}
/* Initialize data */
p_data->p_next = NULL;
p_data->b_discard_payload = 0;
-
p_data->p_payload_start = p_data->p_buffer;
- p_data->p_payload_end = p_data->p_buffer + i_size;
+ p_data->p_payload_end = p_data->p_buffer + l_size;
return( p_data );
+
}
+
/*****************************************************************************
* NewPES: allocates a pes packet
*****************************************************************************/
-static pes_packet_t * NewPES( void * p_garbage )
+static pes_packet_t * NewPES( void * p_packet_cache )
{
- pes_packet_t * p_pes;
+ packet_cache_t * p_cache;
+ pes_packet_t * p_pes;
- if( (p_pes = (pes_packet_t *)malloc( sizeof(pes_packet_t) )) == NULL )
+ if ( (p_cache = (packet_cache_t *)p_packet_cache) == NULL )
{
- intf_DbgMsg( "Out of memory" );
+ intf_ErrMsg( "Packet cache not initialized" );
return NULL;
}
-
+ /* Checks whether the PES cache is empty */
+ if( p_cache->pes.l_index == 0 )
+ {
+ /* Allocates a new packet */
+ if ( (p_pes = malloc( sizeof(pes_packet_t) )) == NULL )
+ {
+ intf_DbgMsg( "Out of memory" );
+ return NULL;
+ }
+ intf_WarnMsg( 1, "PS input: PES packet allocated" );
+ }
+ else
+ {
+ /* Takes the packet out from the cache */
+ if( (p_pes = p_cache->pes.p_stack[ -- p_cache->pes.l_index ])
+ == NULL )
+ {
+ intf_DbgMsg( "NULL packet in the data cache" );
+ return NULL;
+ }
+ }
+
p_pes->b_data_alignment = p_pes->b_discontinuity =
p_pes->i_pts = p_pes->i_dts = 0;
p_pes->i_pes_size = 0;
p_pes->p_first = NULL;
return( p_pes );
+
}
/*****************************************************************************
* DeletePacket: deletes a data packet
*****************************************************************************/
-static void DeletePacket( void * p_garbage,
+static void DeletePacket( void * p_packet_cache,
data_packet_t * p_data )
{
- ASSERT(p_data);
- ASSERT(p_data->p_buffer);
- free( p_data->p_buffer );
- free( p_data );
+ packet_cache_t * p_cache;
+
+ if ( (p_cache = (packet_cache_t *)p_packet_cache) == NULL )
+ {
+ intf_ErrMsg( "Packet cache not initialized" );
+ return;
+ }
+
+ ASSERT( p_data );
+
+ /* Checks whether the data cache is full */
+ if ( p_cache->data.l_index < DATA_CACHE_SIZE )
+ {
+ /* Cache not full: store the packet in it */
+ p_cache->data.p_stack[ p_cache->data.l_index ++ ] = p_data;
+ /* Small buffer or large buffer? */
+ if ( p_data->l_size < MAX_SMALL_SIZE )
+ {
+ /* Checks whether the small buffer cache is full */
+ if ( p_cache->small.l_index < SMALL_CACHE_SIZE )
+ {
+ p_cache->small.p_stack[ p_cache->small.l_index ].l_size =
+ p_data->l_size;
+ p_cache->small.p_stack[ p_cache->small.l_index ++ ].p_data =
+ p_data->p_buffer;
+ }
+ else
+ {
+ ASSERT( p_data->p_buffer );
+ free( p_data->p_buffer );
+ intf_WarnMsg( 1, "PS input: small buffer freed" );
+ }
+ }
+ else
+ {
+ /* Checks whether the large buffer cache is full */
+ if ( p_cache->large.l_index < LARGE_CACHE_SIZE )
+ {
+ p_cache->large.p_stack[ p_cache->large.l_index ].l_size =
+ p_data->l_size;
+ p_cache->large.p_stack[ p_cache->large.l_index ++ ].p_data =
+ p_data->p_buffer;
+ }
+ else
+ {
+ ASSERT( p_data->p_buffer );
+ free( p_data->p_buffer );
+ intf_WarnMsg( 1, "PS input: large buffer freed" );
+ }
+ }
+ }
+ else
+ {
+ /* Cache full: the packet must be freed */
+ free( p_data->p_buffer );
+ free( p_data );
+ intf_WarnMsg( 1, "PS input: data packet freed" );
+ }
+
}
/*****************************************************************************
* DeletePES: deletes a PES packet and associated data packets
*****************************************************************************/
-static void DeletePES( void * p_garbage, pes_packet_t * p_pes )
+static void DeletePES( void * p_packet_cache, pes_packet_t * p_pes )
{
+ packet_cache_t * p_cache;
data_packet_t * p_data;
data_packet_t * p_next;
+ if ( (p_cache = (packet_cache_t *)p_packet_cache) == NULL )
+ {
+ intf_ErrMsg( "Packet cache not initialized" );
+ return;
+ }
+
+ ASSERT( p_pes);
+
p_data = p_pes->p_first;
while( p_data != NULL )
{
p_next = p_data->p_next;
- free( p_data->p_buffer );
- free( p_data );
+ DeletePacket( p_cache, p_data );
p_data = p_next;
}
- free( p_pes );
+ /* Checks whether the PES cache is full */
+ if ( p_cache->pes.l_index < PES_CACHE_SIZE )
+ {
+ /* Cache not full: store the packet in it */
+ p_cache->pes.p_stack[ p_cache->pes.l_index ++ ] = p_pes;
+ }
+ else
+ {
+ /* Cache full: the packet must be freed */
+ free( p_pes );
+ intf_WarnMsg( 1, "PS input: PES packet freed" );
+ }
}
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