* input_netlist.c: netlist management
*****************************************************************************
* Copyright (C) 1998, 1999, 2000 VideoLAN
+ * $Id: input_netlist.c,v 1.28 2001/01/07 03:56:40 henri Exp $
*
* Authors: Henri Fallon <henri@videolan.org>
*
#include "defs.h"
#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/uio.h> /* struct iovec */
+#include <unistd.h>
#include "config.h"
#include "common.h"
size_t i_buffer_size )
{
unsigned int i_loop;
- netlist_t * p_netlist; /* for a cast */
+ netlist_t * p_netlist;
/* First we allocate and initialise our netlist struct */
p_input->p_method_data = malloc(sizeof(netlist_t));
-
-
if ( p_input->p_method_data == NULL )
{
- intf_ErrMsg("Unable to malloc the netlist struct\n");
+ intf_ErrMsg("Unable to malloc the netlist struct");
return (-1);
}
p_netlist = (netlist_t *) p_input->p_method_data;
- /* For the time being, I only handle pes and data. iovec is to come soon
- *
- p_netlist->p_buffers = malloc(i_buffer_size*i_nb_data)
+ /* allocate the buffers */
+ p_netlist->p_buffers =
+ (byte_t *) malloc(i_buffer_size* i_nb_data );
if ( p_netlist->p_buffers == NULL )
{
- intf_ErrMsg ("Unable to malloc in netlist initialization (1)\n");
+ intf_ErrMsg ("Unable to malloc in netlist initialization (1)");
return (-1);
}
- */
+
p_netlist->p_data =
- malloc(i_buffer_size*(i_nb_data + INPUT_READ_ONCE));
+ (data_packet_t *) malloc(sizeof(data_packet_t)*(i_nb_data));
if ( p_netlist->p_data == NULL )
{
- intf_ErrMsg ("Unable to malloc in netlist initialization (2)\n");
+ intf_ErrMsg ("Unable to malloc in netlist initialization (2)");
return (-1);
}
+
p_netlist->p_pes =
- malloc(i_buffer_size*(i_nb_pes + INPUT_READ_ONCE));
+ (pes_packet_t *) malloc(sizeof(pes_packet_t)*(i_nb_pes));
if ( p_netlist->p_pes == NULL )
{
- intf_ErrMsg ("Unable to malloc in netlist initialization (3)\n");
+ intf_ErrMsg ("Unable to malloc in netlist initialization (3)");
return (-1);
}
+
+ /* allocate the FIFOs */
p_netlist->pp_free_data =
- malloc (i_nb_data * sizeof(data_packet_t *) );
+ (data_packet_t **) malloc (i_nb_data * sizeof(data_packet_t *) );
if ( p_netlist->pp_free_data == NULL )
{
- intf_ErrMsg ("Unable to malloc in netlist initialization (4)\n");
+ intf_ErrMsg ("Unable to malloc in netlist initialization (4)");
}
p_netlist->pp_free_pes =
- malloc (i_nb_data * sizeof(pes_packet_t *) );
+ (pes_packet_t **) malloc (i_nb_pes * sizeof(pes_packet_t *) );
if ( p_netlist->pp_free_pes == NULL )
{
- intf_ErrMsg ("Unable to malloc in netlist initialization (5)\n");
+ intf_ErrMsg ("Unable to malloc in netlist initialization (5)");
+ }
+
+ p_netlist->p_free_iovec = ( struct iovec * )
+ malloc( (i_nb_data + INPUT_READ_ONCE) * sizeof(struct iovec) );
+ if ( p_netlist->p_free_iovec == NULL )
+ {
+ intf_ErrMsg ("Unable to malloc in netlist initialization (6)");
}
-
/* Fill the data FIFO */
for ( i_loop = 0; i_loop < i_nb_data; i_loop++ )
{
p_netlist->pp_free_data[i_loop] =
p_netlist->p_data + i_loop;
+
+ p_netlist->pp_free_data[i_loop]->p_buffer =
+ p_netlist->p_buffers + i_loop * i_buffer_size;
+
+ p_netlist->pp_free_data[i_loop]->p_payload_end =
+ p_netlist->pp_free_data[i_loop]->p_buffer + i_buffer_size;
}
/* Fill the PES FIFO */
- for ( i_loop = 0; i_loop < i_nb_pes + INPUT_READ_ONCE; i_loop++ )
+ for ( i_loop = 0; i_loop < i_nb_pes ; i_loop++ )
{
p_netlist->pp_free_pes[i_loop] =
p_netlist->p_pes + i_loop;
}
+
+ /* Deal with the iovec */
+ for ( i_loop = 0; i_loop < i_nb_data; i_loop++ )
+ {
+ p_netlist->p_free_iovec[i_loop].iov_base =
+ p_netlist->p_buffers + i_loop * i_buffer_size;
+
+ p_netlist->p_free_iovec[i_loop].iov_len = i_buffer_size;
+ }
+
/* vlc_mutex_init */
vlc_mutex_init (&p_netlist->lock);
p_netlist->i_data_end = i_nb_data - 1;
p_netlist->i_pes_start = 0;
- p_netlist->i_pes_end = i_nb_pes + INPUT_READ_ONCE - 1;
+ p_netlist->i_pes_end = i_nb_pes - 1;
- // p_netlist->i_iovec_start = 0;
- // p_netlist->i_iovec_end = /* ?? */
-
p_netlist->i_nb_data = i_nb_data;
p_netlist->i_nb_pes = i_nb_pes;
+ p_netlist->i_buffer_size = i_buffer_size;
return (0); /* Everything went all right */
}
/*****************************************************************************
* input_NetlistGetiovec: returns an iovec pointer for a readv() operation
*****************************************************************************/
-struct iovec * input_NetlistGetiovec( void * p_netlist )
+struct iovec * input_NetlistGetiovec( void * p_method_data )
{
- /* fonction la plus difficile, terminer par celle-la
- * je la ferai plus tard :p */
- return ( NULL ); /* nothing yet */
+ netlist_t * p_netlist;
+
+ /* cast */
+ p_netlist = ( netlist_t * ) p_method_data;
+
+ /* check */
+ if (
+ (p_netlist->i_data_end - p_netlist->i_data_start + p_netlist->i_nb_data)
+ %p_netlist->i_nb_data < INPUT_READ_ONCE )
+ {
+ intf_ErrMsg("Empty iovec FIFO. Unable to allocate memory");
+ return (NULL);
+ }
+
+ /* readv only takes contiguous buffers
+ * so, as a solution, we chose to have a FIFO a bit longer
+ * than i_nb_data, and copy the begining of the FIFO to its end
+ * if the readv needs to go after the end */
+ if( p_netlist->i_nb_data - p_netlist->i_data_start < INPUT_READ_ONCE )
+ memcpy( &p_netlist->p_free_iovec[p_netlist->i_nb_data],
+ p_netlist->p_free_iovec,
+ INPUT_READ_ONCE-(p_netlist->i_nb_data-p_netlist->i_data_start)
+ * sizeof(struct iovec *)
+ );
+
+ /* Initialize payload start and end */
+ p_netlist->pp_free_data[p_netlist->i_data_start]->p_payload_start
+ = p_netlist->pp_free_data[p_netlist->i_data_start]->p_buffer;
+
+ p_netlist->pp_free_data[p_netlist->i_data_start]->p_payload_end
+ = p_netlist->pp_free_data[p_netlist->i_data_start]->p_payload_start
+ + p_netlist->i_buffer_size;
+
+ return &p_netlist->p_free_iovec[p_netlist->i_data_start];
+
+}
+
+/*****************************************************************************
+ * input_NetlistMviovec: move the iovec pointer after a readv() operation
+ *****************************************************************************/
+void input_NetlistMviovec( void * p_method_data, size_t i_nb_iovec )
+{
+ netlist_t * p_netlist;
+
+ /* cast */
+ p_netlist = (netlist_t *) p_method_data;
+
+ /* lock */
+ vlc_mutex_lock ( &p_netlist->lock );
+
+ p_netlist->i_data_start += i_nb_iovec;
+ p_netlist->i_data_start %= p_netlist->i_nb_data;
+
+ /* unlock */
+ vlc_mutex_unlock (&p_netlist->lock);
+
}
/*****************************************************************************
* input_NetlistNewPacket: returns a free data_packet_t
*****************************************************************************/
-struct data_packet_s * input_NetlistNewPacket( void * p_netlist )
+struct data_packet_s * input_NetlistNewPacket( void * p_method_data,
+ size_t i_buffer_size )
{
- unsigned int i_return;
- netlist_t * pt_netlist; /* for a cast */
+ netlist_t * p_netlist;
+ struct data_packet_s * p_return;
+
+ /* cast */
+ p_netlist = ( netlist_t * ) p_method_data;
- pt_netlist = ( netlist_t * ) p_netlist;
- /* cast p_netlist -> netlist_t */
+#ifdef DEBUG
+ if( i_buffer_size > p_netlist->i_buffer_size )
+ {
+ /* This should not happen */
+ intf_ErrMsg( "Netlist packet too small !" );
+ return NULL;
+ }
+#endif
/* lock */
- vlc_mutex_lock ( &pt_netlist->lock );
+ vlc_mutex_lock ( &p_netlist->lock );
/* check */
- if ( pt_netlist->i_data_start == pt_netlist->i_data_end )
+ if ( p_netlist->i_data_start == p_netlist->i_data_end )
{
- intf_ErrMsg("Full Data FIFO in netlist - Unable to allocate memory\n");
+ intf_ErrMsg("Empty Data FIFO in netlist. Unable to allocate memory");
return ( NULL );
}
- i_return = (pt_netlist->i_data_start)++;
- pt_netlist->i_data_start %= pt_netlist->i_nb_data;
-
+ p_return = (p_netlist->pp_free_data[p_netlist->i_data_start]);
+ p_netlist->i_data_start++;
+ p_netlist->i_data_start %= p_netlist->i_nb_data;
+
/* unlock */
- vlc_mutex_unlock (&pt_netlist->lock);
+ vlc_mutex_unlock (&p_netlist->lock);
+
+ if (i_buffer_size < p_netlist->i_buffer_size)
+ {
+ p_return->p_payload_end = p_return->p_payload_start + i_buffer_size;
+ }
+
+ /* initialize data */
+ p_return->p_next = NULL;
+ p_return->b_discard_payload = 0;
+
+ p_return->p_payload_start = p_return->p_buffer;
+ p_return->p_payload_end = p_return->p_payload_start + i_buffer_size;
- return ( pt_netlist->pp_free_data[i_return] );
+ return ( p_return );
}
/*****************************************************************************
* input_NetlistNewPES: returns a free pes_packet_t
*****************************************************************************/
-struct pes_packet_s * input_NetlistNewPES( void * p_netlist )
+struct pes_packet_s * input_NetlistNewPES( void * p_method_data )
{
- unsigned int i_return;
- netlist_t * pt_netlist; /* for a cast */
-
- pt_netlist = (netlist_t *)p_netlist;
+ netlist_t * p_netlist;
+ pes_packet_t * p_return;
+
+ /* cast */
+ p_netlist = (netlist_t *) p_method_data;
/* lock */
- vlc_mutex_lock ( &pt_netlist->lock );
+ vlc_mutex_lock ( &p_netlist->lock );
/* check */
- if ( pt_netlist->i_pes_start == pt_netlist->i_pes_end )
+ if ( p_netlist->i_pes_start == p_netlist->i_pes_end )
{
- intf_ErrMsg("Full PES FIFO in netlist - Unable to allocate memory\n");
+ intf_ErrMsg("Empty PES FIFO in netlist - Unable to allocate memory");
return ( NULL );
}
- i_return = (pt_netlist->i_pes_start)++;
- pt_netlist->i_pes_start %= pt_netlist->i_nb_pes;
+ /* allocate */
+ p_return = p_netlist->pp_free_pes[p_netlist->i_pes_start];
+ p_netlist->i_pes_start++;
+ p_netlist->i_pes_start %= p_netlist->i_nb_pes;
/* unlock */
- vlc_mutex_unlock (&pt_netlist->lock);
+ vlc_mutex_unlock (&p_netlist->lock);
- return ( pt_netlist->pp_free_pes[i_return] );
+ /* initialize PES */
+ p_return->b_messed_up =
+ p_return->b_data_alignment =
+ p_return->b_discontinuity =
+ p_return->i_pts = p_return->i_dts = 0;
+ p_return->i_pes_size = 0;
+ p_return->p_first = NULL;
+
+ return ( p_return );
}
/*****************************************************************************
* input_NetlistDeletePacket: puts a data_packet_t back into the netlist
*****************************************************************************/
-void input_NetlistDeletePacket( void * p_netlist, data_packet_t * p_data )
+void input_NetlistDeletePacket( void * p_method_data, data_packet_t * p_data )
{
- netlist_t * pt_netlist; /* for a cast */
-
- pt_netlist = (netlist_t *) p_netlist;
+ netlist_t * p_netlist;
+
+ /* cast */
+ p_netlist = (netlist_t *) p_method_data;
/* lock */
- vlc_mutex_lock ( &pt_netlist->lock );
+ vlc_mutex_lock ( &p_netlist->lock );
- pt_netlist->i_data_end ++;
- pt_netlist->i_data_end %= pt_netlist->i_nb_data;
+ /* Delete data_packet */
+ p_netlist->i_data_end ++;
+ p_netlist->i_data_end %= p_netlist->i_nb_data;
+ p_netlist->pp_free_data[p_netlist->i_data_end] = p_data;
+
+ p_netlist->p_free_iovec[p_netlist->i_data_end].iov_base = p_data->p_buffer;
- pt_netlist->pp_free_data[pt_netlist->i_data_end] = p_data;
-
/* unlock */
- vlc_mutex_unlock (&pt_netlist->lock);
+ vlc_mutex_unlock (&p_netlist->lock);
}
/*****************************************************************************
* input_NetlistDeletePES: puts a pes_packet_t back into the netlist
*****************************************************************************/
-void input_NetlistDeletePES( void * p_netlist, pes_packet_t * p_pes )
+void input_NetlistDeletePES( void * p_method_data, pes_packet_t * p_pes )
{
- /* idem, plus detruire tous les data_packet_t dans p_pes->p_first,
- * p_pes->p_first->p_next, etc. */
- netlist_t * pt_netlist; /* for a cast */
+ netlist_t * p_netlist;
data_packet_t * p_current_packet;
- pt_netlist = (netlist_t *)p_netlist;
+ /* cast */
+ p_netlist = (netlist_t *)p_method_data;
- /* lock */
- vlc_mutex_lock ( &pt_netlist->lock );
+ /* lock */
+ vlc_mutex_lock ( &p_netlist->lock );
- /* free p_pes->p_first, p_next ... */
+ /* delete free p_pes->p_first, p_next ... */
p_current_packet = p_pes->p_first;
while ( p_current_packet != NULL )
{
- /* copy of NetListDeletePacket
- * Duplicate code avoid many locks */
- pt_netlist->i_data_end ++;
- pt_netlist->i_data_end %= pt_netlist->i_nb_data;
-
- pt_netlist->pp_free_data[pt_netlist->i_data_end] = p_current_packet;
+ /* copy of NetListDeletePacket, duplicate code avoid many locks */
+ p_netlist->i_data_end ++;
+ p_netlist->i_data_end %= p_netlist->i_nb_data;
+ p_netlist->pp_free_data[p_netlist->i_data_end] = p_current_packet;
+
+ p_netlist->p_free_iovec[p_netlist->i_data_end].iov_base
+ = p_netlist->p_data->p_buffer;
+
p_current_packet = p_current_packet->p_next;
}
-
- pt_netlist->i_pes_end ++;
- pt_netlist->i_pes_end %= pt_netlist->i_nb_pes;
-
- pt_netlist->pp_free_pes[pt_netlist->i_pes_end] = p_pes;
+
+ /* delete our current PES packet */
+ p_netlist->i_pes_end ++;
+ p_netlist->i_pes_end %= p_netlist->i_nb_pes;
+ p_netlist->pp_free_pes[p_netlist->i_pes_end] = p_pes;
/* unlock */
- vlc_mutex_unlock (&pt_netlist->lock);
+ vlc_mutex_unlock (&p_netlist->lock);
}
/*****************************************************************************
*****************************************************************************/
void input_NetlistEnd( input_thread_t * p_input)
{
- netlist_t * p_netlist; /* for a cast */
+ netlist_t * p_netlist;
+ /* cast */
p_netlist = ( netlist_t * ) p_input->p_method_data;
+ /* destroy the mutex lock */
+ vlc_mutex_destroy (&p_netlist->lock);
+
/* free the FIFO, the buffer, and the netlist structure */
free (p_netlist->pp_free_data);
free (p_netlist->pp_free_pes);
free (p_netlist->p_pes);
free (p_netlist->p_data);
+ free (p_netlist->p_buffers);
+ /* free the netlist */
free (p_netlist);
}
-
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