input.c

vlc stand 0.1.99 ist sehr einfach

/*****************************************************************************
 * input.c: input thread
 * Read an MPEG2 stream, demultiplex and parse it before sending it to
 * decoders.
 *****************************************************************************
 * Copyright (C) 1998, 1999, 2000 VideoLAN
 *
 * Authors:
 *
 * 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 <errno.h>                                                  /* errno */
#include <sys/types.h>                        /* on BSD, uio.h needs types.h */
#include <sys/uio.h>                                            /* "input.h" */
#include <string.h>                                            /* strerror() */

#include <stdlib.h>                                                /* free() */
#include <netinet/in.h>                                           /* ntohs() */

#include "config.h"
#include "common.h"
#include "threads.h"
#include "mtime.h"
#include "intf_msg.h"
#include "plugins.h"
#include "debug.h"

#include "input.h"
#include "input_psi.h"
#include "input_pcr.h"
#include "input_netlist.h"
#include "decoder_fifo.h"
#include "input_file.h"
#include "input_network.h"

#include "audio_output.h"                                   /* aout_thread_t */

#include "audio_decoder.h"        /* audiodec_t (for audio_decoder_thread.h) */
#include "audio_decoder_thread.h"                           /* adec_thread_t */

#include "ac3_decoder.h"              /* ac3dec_t (for ac3_decoder_thread.h) */
#include "ac3_decoder_thread.h"                           /* ac3dec_thread_t */

#include "lpcm_decoder.h"
#include "lpcm_decoder_thread.h"

#include "video.h"                          /* picture_t (for video_output.h) */
#include "video_output.h"                                   /* vout_thread_t */

#include "vdec_idct.h"                     /* dctelem_t (for video_parser.h) */
#include "vdec_motion.h"                  /* f_motion_t (for video_parser.h) */
#include "vpar_blocks.h"                /* macroblock_t (for video_parser.h) */
#include "vpar_headers.h"                 /* sequence_t (for video_parser.h) */
#include "vpar_synchro.h"            /* video_synchro_t (for video_parser.h) */
#include "video_parser.h"                                   /* vpar_thread_t */

#include "spu_decoder.h"                                  /* spudec_thread_t */

#include "main.h"

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static void RunThread   ( input_thread_t *p_input );
static void ErrorThread ( input_thread_t *p_input );
static void EndThread   ( input_thread_t *p_input );

static __inline__ int   input_ReadPacket( input_thread_t *p_input );
static __inline__ void  input_SortPacket( input_thread_t *p_input,
                                          ts_packet_t *ts_packet );
static __inline__ void  input_DemuxTS( input_thread_t *p_input,
                                       ts_packet_t *ts_packet,
                                       es_descriptor_t *es_descriptor );
static __inline__ void  input_DemuxPES( input_thread_t *p_input,
                                        ts_packet_t *ts_packet,
                                        es_descriptor_t *p_es_descriptor,
                                        boolean_t b_unit_start, boolean_t b_packet_lost );
static __inline__ void  input_ParsePES( input_thread_t *p_input,
                                        es_descriptor_t *p_es_descriptor );
static __inline__ void  input_DemuxPSI( input_thread_t *p_input,
                                        ts_packet_t *ts_packet,
                                        es_descriptor_t *p_es_descriptor,
                                        boolean_t b_unit_start, boolean_t b_packet_lost );

/*****************************************************************************
 * input_CreateThread: creates a new input thread
 *****************************************************************************
 * This function creates a new input, and returns a pointer
 * to its description. On error, it returns NULL.
 * If pi_status is NULL, then the function will block until the thread is ready.
 * If not, it will be updated using one of the THREAD_* constants.
 *****************************************************************************/
input_thread_t *input_CreateThread ( int i_method, void *p_source, int i_port, int i_vlan,
                                     p_vout_thread_t p_vout, p_aout_thread_t p_aout, int *pi_status )
{
    input_thread_t *    p_input;                        /* thread descriptor */
    int                 i_status;                           /* thread status */
    int                 i_index;          /* index for tables initialization */

    /* Allocate descriptor */
    intf_DbgMsg("\n");
    p_input = (input_thread_t *)malloc( sizeof(input_thread_t) );
    if( p_input == NULL )
    {
        intf_ErrMsg("error: %s\n", strerror(ENOMEM));
        return( NULL );
    }

    /* Initialize thread properties */
    p_input->b_die              = 0;
    p_input->b_error            = 0;
    p_input->pi_status          = (pi_status != NULL) ? pi_status : &i_status;
    *p_input->pi_status         = THREAD_CREATE;

    /* Initialize input method description */
    p_input->i_method           = i_method;
    p_input->p_source           = p_source;
    p_input->i_port             = i_port;
    p_input->i_vlan             = i_vlan;
    switch( i_method )
    {
    case INPUT_METHOD_TS_FILE:                               /* file methods */
        p_input->p_Open =   input_FileOpen;
        p_input->p_Read =   input_FileRead;
        p_input->p_Close =  input_FileClose;
        break;
    case INPUT_METHOD_TS_VLAN_BCAST:                  /* vlan network method */
        if( !p_main->b_vlans )
        {
            intf_ErrMsg("error: vlans are not activated\n");
            free( p_input );
            return( NULL );
        }
        /* ... pass through */
    case INPUT_METHOD_TS_UCAST:                           /* network methods */
    case INPUT_METHOD_TS_MCAST:
    case INPUT_METHOD_TS_BCAST:
        p_input->p_Open =   input_NetworkOpen;
        p_input->p_Read =   input_NetworkRead;
        p_input->p_Close =  input_NetworkClose;
        break;
    default:
        intf_ErrMsg("error: unknow input method\n");
        free( p_input );
        return( NULL );
        break;
    }

    /* Initialize stream description */
    for( i_index = 0; i_index < INPUT_MAX_ES; i_index++ )
    {
        p_input->p_es[i_index].i_id = EMPTY_PID;
        p_input->pp_selected_es[i_index] = NULL;
    }

    /* Initialize default settings for spawned decoders */
    p_input->p_aout                     = p_aout;
    p_input->p_vout                     = p_vout;

#ifdef STATS
    /* Initialize statistics */
    p_input->c_loops                    = 0;
    p_input->c_bytes                    = 0;
    p_input->c_payload_bytes            = 0;
    p_input->c_packets_read             = 0;
    p_input->c_packets_trashed          = 0;
#endif

    /* Initialize PSI and PCR decoders */
    if( input_PsiInit( p_input ) )
    {
        free( p_input );
        return( NULL );
    }

    if( input_PcrInit( p_input ) )
    {
        input_PsiEnd( p_input );
        free( p_input );
        return( NULL );
    }

    /* Initialize netlists */
    if( input_NetlistInit( p_input ) )
    {
        input_PsiEnd( p_input );
        input_PcrEnd( p_input );
        free( p_input );
        return( NULL );
    }

    intf_DbgMsg("configuration: method=%d, source=%s, port=%d, vlan=%d\n",
                i_method, p_source, i_port, i_vlan );

    /* Let the appropriate method open the socket. */
    if( p_input->p_Open( p_input ) )
    {
        input_NetlistEnd( p_input );
        input_PsiEnd( p_input );
        input_PcrEnd( p_input );
        free( p_input );
        return( NULL );
    }

    /* Create thread and set locks. */
    vlc_mutex_init( &p_input->netlist.lock );
    vlc_mutex_init( &p_input->programs_lock );
    vlc_mutex_init( &p_input->es_lock );
    if( vlc_thread_create(&p_input->thread_id, "input", (void *) RunThread, (void *) p_input) )
    {
        intf_ErrMsg("error: %s\n", strerror(errno) );
        p_input->p_Close( p_input );
        input_NetlistEnd( p_input );;
        input_PsiEnd( p_input );
        input_PcrEnd( p_input );
        free( p_input );
        return( NULL );
    }

    intf_Msg("Input initialized\n");

    /* If status is NULL, wait until the thread is created */
    if( pi_status == NULL )
    {
        do
        {
            msleep( THREAD_SLEEP );
        }while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
                && (i_status != THREAD_FATAL) );
        if( i_status != THREAD_READY )
        {
            return( NULL );
        }
    }
    return( p_input );
}

/*****************************************************************************
 * input_DestroyThread: mark an input thread as zombie
 *****************************************************************************
 * This function should not return until the thread is effectively cancelled.
 *****************************************************************************/
void input_DestroyThread( input_thread_t *p_input, int *pi_status )
{
    int         i_status;                                   /* thread status */

    /* Set status */
    p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
    *p_input->pi_status = THREAD_DESTROY;

    /* Request thread destruction */
    p_input->b_die = 1;

    /* If status is NULL, wait until thread has been destroyed */
    if( pi_status == NULL )
    {
        do
        {
            msleep( THREAD_SLEEP );
        }while( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
                && (i_status != THREAD_FATAL) );
    }
}

#if 0
/*****************************************************************************
 * input_OpenAudioStream: open an audio stream
 *****************************************************************************
 * This function spawns an audio decoder and plugs it on the audio output
 * thread.
 *****************************************************************************/
int input_OpenAudioStream( input_thread_t *p_input, int i_id )
{
    /* XXX?? */
}

/*****************************************************************************
 * input_CloseAudioStream: close an audio stream
 *****************************************************************************
 * This function destroys an audio decoder.
 *****************************************************************************/
void input_CloseAudioStream( input_thread_t *p_input, int i_id )
{
    /* XXX?? */
}

/*****************************************************************************
 * input_OpenVideoStream: open a video stream
 *****************************************************************************
 * This function spawns a video decoder and plugs it on a video output thread.
 *****************************************************************************/
int input_OpenVideoStream( input_thread_t *p_input,
                           struct vout_thread_s *p_vout, struct video_cfg_s * p_cfg )
{
    /* XXX?? */
}

/*****************************************************************************
 * input_CloseVideoStream: close a video stream
 *****************************************************************************
 * This function destroys an video decoder.
 *****************************************************************************/
void input_CloseVideoStream( input_thread_t *p_input, int i_id )
{
    /* XXX?? */
}
#endif

/* following functions are local */

/*****************************************************************************
 * InitThread: initialize input thread
 *****************************************************************************
 * This function is called from RunThread and performs the second step of the
 * initialization. It returns 0 on success. Note that the thread's flag are not
 * modified inside this function.
 *****************************************************************************/
static int InitThread( input_thread_t *p_input )
{
    /* Mark thread as running and return */
    intf_DbgMsg("\n");
    *p_input->pi_status =        THREAD_READY;
    intf_DbgMsg("thread ready\n");
    return( 0 );
}

/*****************************************************************************
 * RunThread: main thread loop
 *****************************************************************************
 * Thread in charge of processing the network packets and demultiplexing.
 *****************************************************************************/
static void RunThread( input_thread_t *p_input )
{
    /*
     * Initialize thread and free configuration
     */
    p_input->b_error = InitThread( p_input );
    if( p_input->b_error )
    {
        free( p_input );                               /* destroy descriptor */
        return;
    }