-/*****************************************************************************
- * dvd_netlist.c: Specific netlist for DVD packets
- *****************************************************************************
- * The original is in src/input.
- * There is only one major change from input_netlist.c : data is now a
- * pointer to an offset in iovec ; and iovec has a reference counter. It
- * will only be given back to netlist when refcount is zero.
- *****************************************************************************
- * Copyright (C) 1998, 1999, 2000, 2001 VideoLAN
- * $Id: dvd_netlist.c,v 1.14 2001/08/09 20:16:17 jlj Exp $
- *
- * Authors: Henri Fallon <henri@videolan.org>
- * Stéphane Borel <stef@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
- * (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 "defs.h"
-
-#include <stdlib.h>
-#include <string.h> /* memcpy(), memset() */
-#include <sys/types.h>
-
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
-#if defined( WIN32 )
-# include <io.h> /* read() */
-#else
-# include <sys/uio.h> /* struct iovec */
-#endif
-
-#include "config.h"
-#include "common.h"
-#include "threads.h" /* mutex */
-#include "mtime.h"
-#include "intf_msg.h" /* intf_*Msg */
-
-#if defined( WIN32 )
-# include "input_iovec.h"
-#endif
-
-#include "stream_control.h"
-#include "input_ext-intf.h"
-#include "input_ext-dec.h"
-#include "input_ext-plugins.h"
-
-#include "dvd_netlist.h"
-
-#include "modules.h"
-#include "modules_export.h"
-
-/*****************************************************************************
- * Local prototypes
- *****************************************************************************/
-
-/*****************************************************************************
- * DVDNetlistInit: allocates netlist buffers and init indexes
- * ---
- * Changes from input_NetList: we have to give the length of the buffer which
- * is different from i_nb_data now, since we may have several data pointers
- * in one iovec. Thus we can only delete an iovec when its refcount is 0.
- * We only received a buffer with a GetIovec whereas NewPacket gives a pointer.
- *
- * Warning: i_nb_iovec, i_nb_data, i_nb_pes have to be 2^x
- *****************************************************************************/
-dvd_netlist_t * DVDNetlistInit( int i_nb_iovec, int i_nb_data, int i_nb_pes,
- size_t i_buffer_size, int i_read_once )
-{
- unsigned int i_loop;
- dvd_netlist_t * p_netlist;
-
- /* First we allocate and initialise our netlist struct */
- p_netlist = malloc( sizeof(dvd_netlist_t) );
- if ( p_netlist == NULL )
- {
- intf_ErrMsg("Unable to malloc the DVD netlist struct");
- free( p_netlist );
- return NULL;
- }
-
- /* Nb of packets read once by input */
- p_netlist->i_read_once = i_read_once;
-
- /* allocate the buffers */
- p_netlist->p_buffers = malloc( i_nb_iovec *i_buffer_size );
- if ( p_netlist->p_buffers == NULL )
- {
- intf_ErrMsg ("Unable to malloc in DVD netlist initialization (1)");
- free( p_netlist->p_buffers );
- free( p_netlist );
- return NULL;
- }
-
- /* table of pointers to data packets */
- p_netlist->p_data = malloc( i_nb_data *sizeof(data_packet_t) );
- if ( p_netlist->p_data == NULL )
- {
- intf_ErrMsg ("Unable to malloc in DVD netlist initialization (2)");
- free( p_netlist->p_buffers );
- free( p_netlist->p_data );
- free( p_netlist );
- return NULL;
- }
-
- /* table of pointer to PES packets */
- p_netlist->p_pes = malloc( i_nb_pes *sizeof(pes_packet_t) );
- if ( p_netlist->p_pes == NULL )
- {
- intf_ErrMsg ("Unable to malloc in DVD netlist initialization (3)");
- free( p_netlist->p_buffers );
- free( p_netlist->p_data );
- free( p_netlist->p_pes );
- free( p_netlist );
- return NULL;
- }
-
- /* allocate the FIFOs : tables of free pointers */
- p_netlist->pp_free_data =
- malloc( i_nb_data *sizeof(data_packet_t *) );
- if ( p_netlist->pp_free_data == NULL )
- {
- intf_ErrMsg ("Unable to malloc in DVD netlist initialization (4)");
- free( p_netlist->p_buffers );
- free( p_netlist->p_data );
- free( p_netlist->p_pes );
- free( p_netlist->pp_free_data );
- free( p_netlist );
- return NULL;
- }
- p_netlist->pp_free_pes =
- malloc( i_nb_pes *sizeof(pes_packet_t *) );
- if ( p_netlist->pp_free_pes == NULL )
- {
- intf_ErrMsg ("Unable to malloc in DVD netlist initialization (5)");
- free( p_netlist->p_buffers );
- free( p_netlist->p_data );
- free( p_netlist->p_pes );
- free( p_netlist->pp_free_data );
- free( p_netlist->pp_free_pes );
- free( p_netlist );
- return NULL;
- }
-
- p_netlist->p_free_iovec =
- malloc( (i_nb_iovec + p_netlist->i_read_once) * sizeof(struct iovec) );
- if ( p_netlist->p_free_iovec == NULL )
- {
- intf_ErrMsg ("Unable to malloc in DVD netlist initialization (6)");
- free( p_netlist->p_buffers );
- free( p_netlist->p_data );
- free( p_netlist->p_pes );
- free( p_netlist->pp_free_data );
- free( p_netlist->pp_free_pes );
- free( p_netlist->p_free_iovec );
- free( p_netlist );
- return NULL;
- }
-
- /* table for reference counter of iovecs */
- p_netlist->pi_refcount = malloc( i_nb_iovec *sizeof(int) );
- if ( p_netlist->pi_refcount == NULL )
- {
- intf_ErrMsg ("Unable to malloc in DVD netlist initialization (7)");
- free( p_netlist->p_buffers );
- free( p_netlist->p_data );
- free( p_netlist->p_pes );
- free( p_netlist->pp_free_data );
- free( p_netlist->pp_free_pes );
- free( p_netlist->p_free_iovec );
- free( p_netlist->pi_refcount );
- free( p_netlist );
- return NULL;
- }
-
- /* 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;
- }
-
- /* Fill the PES FIFO */
- 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_iovec; 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;
- }
-
- /* initialize reference counters */
- memset( p_netlist->pi_refcount, 0, i_nb_iovec *sizeof(int) );
-
- /* vlc_mutex_init */
- vlc_mutex_init (&p_netlist->lock);
-
- /* initialize indexes */
- p_netlist->i_iovec_start = 0;
- p_netlist->i_iovec_end = i_nb_iovec - 1;
-
- p_netlist->i_data_start = 0;
- p_netlist->i_data_end = i_nb_data - 1;
-
- p_netlist->i_pes_start = 0;
- p_netlist->i_pes_end = i_nb_pes - 1;
-
- /* we give (nb - 1) to use & instead of %
- * if you really need nb you have to add 1 */
- p_netlist->i_nb_iovec = i_nb_iovec - 1;
- p_netlist->i_nb_data = i_nb_data - 1;
- p_netlist->i_nb_pes = i_nb_pes - 1;
- p_netlist->i_buffer_size = i_buffer_size;
-
- return p_netlist; /* Everything went all right */
-}
-
-/*****************************************************************************
- * DVDGetiovec: returns an iovec pointer for a readv() operation
- *****************************************************************************
- * We return an iovec vector, so that readv can read many packets at a time.
- * pp_data will be set to direct to the fifo pointer in DVDMviovec, which
- * will allow us to get the corresponding data_packet.
- *****************************************************************************/
-struct iovec * DVDGetiovec( void * p_method_data )
-{
- dvd_netlist_t * p_netlist;
-
- /* cast */
- p_netlist = (dvd_netlist_t *)p_method_data;
-
- /* check that we have enough free iovec */
- if( (
- (p_netlist->i_iovec_end - p_netlist->i_iovec_start)
- & p_netlist->i_nb_iovec ) < p_netlist->i_read_once )
- {
- intf_WarnMsg( 12, "input info: waiting for free iovec" );
- msleep( INPUT_IDLE_SLEEP );
-
- while( (
- (p_netlist->i_iovec_end - p_netlist->i_iovec_start)
- & p_netlist->i_nb_iovec ) < p_netlist->i_read_once )
- {
- msleep( INPUT_IDLE_SLEEP );
- }
-
- intf_WarnMsg( 12, "input info: found free iovec" );
- }
-
- if( (
- (p_netlist->i_data_end - p_netlist->i_data_start)
- & p_netlist->i_nb_data ) < p_netlist->i_read_once )
- {
- intf_WarnMsg( 12, "input info: waiting for free data packet" );
- msleep( INPUT_IDLE_SLEEP );
-
- while( (
- (p_netlist->i_data_end - p_netlist->i_data_start)
- & p_netlist->i_nb_data ) < p_netlist->i_read_once )
- {
- msleep( INPUT_IDLE_SLEEP );
- }
-
- intf_WarnMsg( 12, "input info: found free data packet" );
- }
-
- /* 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_iovec - p_netlist->i_iovec_start + 1 <
- p_netlist->i_read_once )
- {
- memcpy( &p_netlist->p_free_iovec[p_netlist->i_nb_iovec + 1],
- p_netlist->p_free_iovec,
- (p_netlist->i_read_once -
- (p_netlist->i_nb_iovec + 1 - p_netlist->i_iovec_start))
- * sizeof(struct iovec)
- );
-
- }
-
- return p_netlist->p_free_iovec + p_netlist->i_iovec_start;
-
-}
-
-/*****************************************************************************
- * DVDMviovec: move the iovec pointer by one after a readv() operation and
- * gives a data_packet corresponding to iovec in p_data
- *****************************************************************************/
-void DVDMviovec( void * p_method_data, int i_nb_iovec,
- struct data_packet_s ** pp_data )
-{
- dvd_netlist_t * p_netlist;
- unsigned int i_loop = 0;
-
- /* cast */
- p_netlist = (dvd_netlist_t *)p_method_data;
-
- /* lock */
- vlc_mutex_lock( &p_netlist->lock );
-
- /* Fills a table of pointers to packets associated with the io_vec's */
- while( i_loop < i_nb_iovec )
- {
- pp_data[i_loop] = p_netlist->pp_free_data[p_netlist->i_data_start];
-
- pp_data[i_loop]->p_buffer =
- p_netlist->p_free_iovec[p_netlist->i_iovec_start].iov_base;
-
- pp_data[i_loop]->pi_refcount = p_netlist->pi_refcount +
- p_netlist->i_iovec_start;
-
- p_netlist->i_iovec_start ++;
- p_netlist->i_iovec_start &= p_netlist->i_nb_iovec;
-
- p_netlist->i_data_start ++;
- p_netlist->i_data_start &= p_netlist->i_nb_data;
-
- i_loop ++;
- }
-
- /* unlock */
- vlc_mutex_unlock( &p_netlist->lock );
-
-}
-
-/*****************************************************************************
- * DVDNewPtr: returns a free data_packet_t
- * Gives a pointer ; its fields need to be initialized
- *****************************************************************************/
-struct data_packet_s * DVDNewPtr( void * p_method_data )
-{
- dvd_netlist_t * p_netlist;
- struct data_packet_s * p_return;
-
- /* cast */
- p_netlist = (dvd_netlist_t *)p_method_data;
-
- /* lock */
- vlc_mutex_lock ( &p_netlist->lock );
-
- /* check */
- if ( p_netlist->i_data_start == p_netlist->i_data_end )
- {
- intf_ErrMsg("Empty Data FIFO in netlist. Unable to allocate memory");
- return ( NULL );
- }
-
- 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 (&p_netlist->lock);
-
- return ( p_return );
-}
-
-/*****************************************************************************
- * DVDNewPacket: returns a free data_packet_t, and takes a corresponding
- * storage iovec
- *****************************************************************************/
-struct data_packet_s * DVDNewPacket( void * p_method_data,
- size_t i_buffer_size )
-{
- dvd_netlist_t * p_netlist;
- struct data_packet_s * p_packet;
-//intf_ErrMsg( "netlist: New packet" );
- /* cast */
- p_netlist = (dvd_netlist_t *)p_method_data;
-
- /* lock */
- vlc_mutex_lock( &p_netlist->lock );
-
- /* check */
- if ( p_netlist->i_iovec_start == p_netlist->i_iovec_end )
- {
- intf_ErrMsg("Empty io_vec FIFO in netlist. Unable to allocate memory");
- return ( NULL );
- }
-
- if ( p_netlist->i_data_start == p_netlist->i_data_end )
- {
- intf_ErrMsg("Empty Data FIFO in netlist. Unable to allocate memory");
- return ( NULL );
- }
-
-
- /* Gives an io_vec and associated data */
- p_packet = p_netlist->pp_free_data[p_netlist->i_data_start];
-
- p_packet->p_buffer =
- p_netlist->p_free_iovec[p_netlist->i_iovec_start].iov_base;
-
- p_packet->p_payload_start = p_packet->p_buffer;
-
- p_packet->p_payload_end =
- p_packet->p_buffer + i_buffer_size;
-
- p_packet->p_next = NULL;
- p_packet->b_discard_payload = 0;
-
- p_packet->pi_refcount = p_netlist->pi_refcount + p_netlist->i_iovec_start;
- (*p_packet->pi_refcount)++;
-
- p_netlist->i_iovec_start ++;
- p_netlist->i_iovec_start &= p_netlist->i_nb_iovec;
-
- p_netlist->i_data_start ++;
- p_netlist->i_data_start &= p_netlist->i_nb_data;
-
- /* unlock */
- vlc_mutex_unlock( &p_netlist->lock );
-
- return p_packet;
-}
-
-/*****************************************************************************
- * DVDNewPES: returns a free pes_packet_t
- *****************************************************************************/
-struct pes_packet_s * DVDNewPES( void * p_method_data )
-{
- dvd_netlist_t * p_netlist;
- pes_packet_t * p_return;
-
-//intf_ErrMsg( "netlist: New pes" );
- /* cast */
- p_netlist = (dvd_netlist_t *)p_method_data;
-
- /* lock */
- vlc_mutex_lock ( &p_netlist->lock );
-
- /* check */
- if ( p_netlist->i_pes_start == p_netlist->i_pes_end )
- {
- intf_ErrMsg("Empty PES FIFO in netlist - Unable to allocate memory");
- return ( NULL );
- }
-
- /* 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 (&p_netlist->lock);
-
- /* initialize PES */
- p_return->b_data_alignment = 0;
- p_return->b_discontinuity = 0;
- p_return->i_pts = 0;
- p_return->i_dts = 0;
- p_return->i_pes_size = 0;
- p_return->p_first = NULL;
-
- return ( p_return );
-}
-
-/*****************************************************************************
- * DVDDeletePacket: puts a data_packet_t back into the netlist
- *****************************************************************************/
-void DVDDeletePacket( void * p_method_data, data_packet_t * p_data )
-{
- dvd_netlist_t * p_netlist;
-
- /* cast */
- p_netlist = (dvd_netlist_t *) p_method_data;
-
- /* lock */
- vlc_mutex_lock ( &p_netlist->lock );
-
-
- /* 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_data->p_next = NULL;
- p_data->b_discard_payload = 0;
-
- /* Update reference counter */
- (*p_data->pi_refcount)--;
-
- if( (*p_data->pi_refcount) == 0 )
- {
-
- p_netlist->i_iovec_end++;
- p_netlist->i_iovec_end &= p_netlist->i_nb_iovec;
- p_netlist->p_free_iovec[p_netlist->i_iovec_end].iov_base =
- p_data->p_buffer;
- }
-
- /* unlock */
- vlc_mutex_unlock (&p_netlist->lock);
-}
-
-/*****************************************************************************
- * DVDDeletePES: puts a pes_packet_t back into the netlist
- *****************************************************************************/
-void DVDDeletePES( void * p_method_data, pes_packet_t * p_pes )
-{
- dvd_netlist_t * p_netlist;
- data_packet_t * p_current_packet;
- data_packet_t * p_next_packet;
-
- /* cast */
- p_netlist = (dvd_netlist_t *)p_method_data;
-
- /* lock */
- vlc_mutex_lock ( &p_netlist->lock );
-
- /* 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 */
-
- p_netlist->i_data_end ++;
- p_netlist->i_data_end &= p_netlist->i_nb_data;
-
- /* re initialize */
- p_current_packet->p_payload_start = p_current_packet->p_buffer;
-
- p_netlist->pp_free_data[p_netlist->i_data_end] = p_current_packet;
-
- /* Update reference counter */
- (*p_current_packet->pi_refcount)--;
-
- if( (*p_current_packet->pi_refcount) <= 0 )
- {
- p_netlist->i_iovec_end++;
- p_netlist->i_iovec_end &= p_netlist->i_nb_iovec;
- p_netlist->p_free_iovec[p_netlist->i_iovec_end].iov_base =
- p_current_packet->p_buffer;
- }
-
- p_next_packet = p_current_packet->p_next;
- p_current_packet->p_next = NULL;
- p_current_packet->b_discard_payload = 0;
- p_current_packet = p_next_packet;
- }
-
- /* 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 (&p_netlist->lock);
-
-}
-
-/*****************************************************************************
- * DVDNetlistEnd: frees all allocated structures
- *****************************************************************************/
-void DVDNetlistEnd( dvd_netlist_t * p_netlist )
-{
- /* destroy the mutex lock */
- vlc_mutex_destroy( &p_netlist->lock );
-
- /* free the FIFO, the buffer, and the netlist structure */
- free( p_netlist->pi_refcount );
- free( p_netlist->p_free_iovec );
- free( p_netlist->pp_free_pes );
- free( p_netlist->pp_free_data );
- free( p_netlist->p_pes );
- free( p_netlist->p_data );
- free( p_netlist->p_buffers );
-
- /* free the netlist */
- free( p_netlist );
-}