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349 lines
12 KiB
349 lines
12 KiB
/*******************************************************************************
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* video_parser.c : video parser thread
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* (c)1999 VideoLAN
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*******************************************************************************/
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/* ?? passer en terminate/destroy avec les signaux supplémentaires */
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/*******************************************************************************
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* Preamble
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*******************************************************************************/
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#include <errno.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/uio.h>
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#include <X11/Xlib.h>
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#include <X11/extensions/XShm.h>
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#include "config.h"
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#include "common.h"
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#include "mtime.h"
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#include "vlc_thread.h"
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#include "intf_msg.h"
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#include "debug.h" /* ?? temporaire, requis par netlist.h */
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#include "input.h"
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#include "input_netlist.h"
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#include "decoder_fifo.h"
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#include "video.h"
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#include "video_output.h"
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#include "vdec_idct.h"
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#include "video_decoder.h"
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#include "vdec_motion.h"
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#include "vpar_blocks.h"
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#include "vpar_headers.h"
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#include "video_fifo.h"
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#include "vpar_synchro.h"
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#include "video_parser.h"
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/*
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* Local prototypes
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*/
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//static int CheckConfiguration ( video_cfg_t *p_cfg );
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static int InitThread ( vpar_thread_t *p_vpar );
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static void RunThread ( vpar_thread_t *p_vpar );
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static void ErrorThread ( vpar_thread_t *p_vpar );
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static void EndThread ( vpar_thread_t *p_vpar );
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/*******************************************************************************
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* vpar_CreateThread: create a generic parser thread
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*******************************************************************************
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* This function creates a new video parser thread, and returns a pointer
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* to its description. On error, it returns NULL.
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* Following configuration properties are used:
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* ??
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*******************************************************************************/
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vpar_thread_t * vpar_CreateThread( /* video_cfg_t *p_cfg, */ input_thread_t *p_input /*,
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vout_thread_t *p_vout, int *pi_status */ )
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{
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vpar_thread_t * p_vpar;
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intf_DbgMsg("vpar debug: creating video parser thread\n");
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/* Allocate the memory needed to store the thread's structure */
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if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
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{
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intf_ErrMsg("vpar error: not enough memory for vpar_CreateThread() to create the new thread\n");
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return( NULL );
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}
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/*
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* Initialize the thread properties
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*/
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p_vpar->b_die = 0;
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p_vpar->b_error = 0;
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/*
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* Initialize the input properties
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*/
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/* Initialize the parser fifo's data lock and conditional variable and set * its buffer as empty */
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vlc_mutex_init( &p_vpar->fifo.data_lock );
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vlc_cond_init( &p_vpar->fifo.data_wait );
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p_vpar->fifo.i_start = 0;
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p_vpar->fifo.i_end = 0;
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/* Initialize the bit stream structure */
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p_vpar->bit_stream.p_input = p_input;
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p_vpar->bit_stream.p_decoder_fifo = &p_vpar->fifo;
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p_vpar->bit_stream.fifo.buffer = 0;
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p_vpar->bit_stream.fifo.i_available = 0;
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/* Spawn the video parser thread */
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if ( vlc_thread_create(&p_vpar->thread_id, "video parser", (vlc_thread_func)RunThread, (void *)p_vpar) )
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{
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intf_ErrMsg("vpar error: can't spawn video parser thread\n");
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free( p_vpar );
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return( NULL );
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}
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intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
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return( p_vpar );
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}
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/*******************************************************************************
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* vpar_DestroyThread: destroy a generic parser thread
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*******************************************************************************
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* Destroy a terminated thread. This function will return 0 if the thread could
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* be destroyed, and non 0 else. The last case probably means that the thread
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* was still active, and another try may succeed.
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*******************************************************************************/
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void vpar_DestroyThread( vpar_thread_t *p_vpar /*, int *pi_status */ )
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{
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intf_DbgMsg("vpar debug: requesting termination of video parser thread %p\n", p_vpar);
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/* Ask thread to kill itself */
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p_vpar->b_die = 1;
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/* Make sure the parser thread leaves the GetByte() function */
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vlc_mutex_lock( &(p_vpar->fifo.data_lock) );
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vlc_cond_signal( &(p_vpar->fifo.data_wait) );
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vlc_mutex_unlock( &(p_vpar->fifo.data_lock) );
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/* Waiting for the parser thread to exit */
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/* Remove this as soon as the "status" flag is implemented */
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vlc_thread_join( p_vpar->thread_id );
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}
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/* following functions are local */
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/*******************************************************************************
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* CheckConfiguration: check vpar_CreateThread() configuration
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*******************************************************************************
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* Set default parameters where required. In DEBUG mode, check if configuration
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* is valid.
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*******************************************************************************/
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#if 0
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static int CheckConfiguration( video_cfg_t *p_cfg )
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{
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/* ?? */
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return( 0 );
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}
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#endif
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/*******************************************************************************
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* InitThread: initialize vpar output thread
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*******************************************************************************
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* This function is called from RunThread and performs the second step of the
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* initialization. It returns 0 on success. Note that the thread's flag are not
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* modified inside this function.
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*******************************************************************************/
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static int InitThread( vpar_thread_t *p_vpar )
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{
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int i_dummy;
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intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
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/* Our first job is to initialize the bit stream structure with the
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* beginning of the input stream */
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vlc_mutex_lock( &p_vpar->fifo.data_lock );
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while ( DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
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{
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vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
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}
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p_vpar->bit_stream.p_ts = DECODER_FIFO_START( p_vpar->fifo )->p_first_ts;
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p_vpar->bit_stream.i_byte = p_vpar->bit_stream.p_ts->i_payload_start;
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vlc_mutex_unlock( &p_vpar->fifo.data_lock );
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#if 0
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/* ?? */
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/* Create video stream */
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p_vpar->i_stream = vout_CreateStream( p_vpar->p_vout );
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if( p_vpar->i_stream < 0 ) /* error */
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{
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return( 1 );
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}
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#endif
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/* Initialize parsing data */
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p_vpar->sequence.p_forward = NULL;
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p_vpar->sequence.p_backward = NULL;
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p_vpar->sequence.intra_quant.b_allocated = 0;
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p_vpar->sequence.nonintra_quant.b_allocated = 0;
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p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
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p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
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/* Initialize copyright information */
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p_vpar->sequence.b_copyright_flag = 0;
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p_vpar->sequence.b_original = 0;
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p_vpar->sequence.i_copyright_id = 0;
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p_vpar->sequence.i_copyright_nb = 0;
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/* Initialize other properties */
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#ifdef STATS
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p_vpar->c_loops = 0;
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p_vpar->c_idle_loops = 0;
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p_vpar->c_pictures = 0;
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p_vpar->c_i_pictures = 0;
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p_vpar->c_p_pictures = 0;
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p_vpar->c_b_pictures = 0;
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p_vpar->c_decoded_pictures = 0;
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p_vpar->c_decoded_i_pictures = 0;
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p_vpar->c_decoded_p_pictures = 0;
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p_vpar->c_decoded_b_pictures = 0;
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#endif
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/* Initialize video FIFO */
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vpar_InitFIFO( p_vpar );
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bzero( p_vpar->p_vdec, NB_VDEC*sizeof(vdec_thread_t *) );
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/* Spawn video_decoder threads */
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/* ??? modify the number of vdecs at runtime ? */
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for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
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{
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if( (p_vpar->p_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
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{
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return( 1 );
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}
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}
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/* Initialize lookup tables */
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InitMbAddrInc( p_vpar );
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/* Mark thread as running and return */
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intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
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return( 0 );
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}
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/*******************************************************************************
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* RunThread: generic parser thread
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*******************************************************************************
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* Video parser thread. This function does only returns when the thread is
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* terminated.
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*******************************************************************************/
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static void RunThread( vpar_thread_t *p_vpar )
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{
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intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
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/*
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* Initialize thread
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*/
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p_vpar->b_error = InitThread( p_vpar );
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if( p_vpar->b_error )
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{
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return;
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}
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p_vpar->b_run = 1;
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/*
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* Main loop - it is not executed if an error occured during
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* initialization
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*/
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while( (!p_vpar->b_die) && (!p_vpar->b_error) )
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{
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/* Find the next sequence header in the stream */
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p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );
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#ifdef STATS
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p_vpar->c_sequences++;
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#endif
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while( (!p_vpar->b_die) && (!p_vpar->b_error) )
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{
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/* Parse the next sequence, group or picture header */
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if( vpar_ParseHeader( p_vpar ) )
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{
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/* End of sequence */
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break;
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};
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}
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}
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/*
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* Error loop
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*/
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if( p_vpar->b_error )
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{
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ErrorThread( p_vpar );
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}
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/* End of thread */
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EndThread( p_vpar );
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p_vpar->b_run = 0;
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}
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/*******************************************************************************
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* ErrorThread: RunThread() error loop
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*******************************************************************************
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* This function is called when an error occured during thread main's loop. The
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* thread can still receive feed, but must be ready to terminate as soon as
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* possible.
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*******************************************************************************/
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static void ErrorThread( vpar_thread_t *p_vpar )
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{
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/* Wait until a `die' order */
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while( !p_vpar->b_die )
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{
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/* We take the lock, because we are going to read/write the start/end
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* indexes of the parser fifo */
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vlc_mutex_lock( &p_vpar->fifo.data_lock );
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/* ?? trash all trashable PES packets */
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while( !DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
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{
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input_NetlistFreePES( p_vpar->bit_stream.p_input,
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DECODER_FIFO_START(p_vpar->fifo) );
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DECODER_FIFO_INCSTART( p_vpar->fifo );
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}
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vlc_mutex_unlock( &p_vpar->fifo.data_lock );
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/* Sleep a while */
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msleep( VPAR_IDLE_SLEEP );
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}
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}
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/*******************************************************************************
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* EndThread: thread destruction
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*******************************************************************************
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* This function is called when the thread ends after a sucessfull
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* initialization.
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*******************************************************************************/
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static void EndThread( vpar_thread_t *p_vpar )
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{
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int i_dummy;
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intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
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#ifdef DEBUG
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/* Check for remaining PES packets */
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/* ?? */
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#endif
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/* Destroy thread structures allocated by InitThread */
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// vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
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/* ?? */
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/* Destroy vdec threads */
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for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
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{
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if( p_vpar->p_vdec[i_dummy] != NULL )
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vdec_DestroyThread( p_vpar->p_vdec[i_dummy] );
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else
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break;
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}
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intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);
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}
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