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293 lines
11 KiB
293 lines
11 KiB
/*******************************************************************************
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* input_ctrl.c: Decodeur control
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* (c)1999 VideoLAN
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*******************************************************************************
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* Control the extraction and the decoding of the programs elements carried in
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* a stream.
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*******************************************************************************/
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/*******************************************************************************
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* Preamble
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*******************************************************************************/
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#include "vlc.h"
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#if 0
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#include <errno.h>
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#include <sys/uio.h> /* iovec */
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#include <stdlib.h> /* atoi(), malloc(), free() */
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <netinet/in.h> /* ntohs */
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#include "common.h"
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#include "config.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"
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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 "audio_output.h"
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#include "audio_dsp.h"
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#include "audio_decoder.h"
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#include "video.h"
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#include "video_output.h"
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#include "video_decoder.h"
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#endif
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/******************************************************************************
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* input_AddPgrmElem: Start the extraction and the decoding of a program element
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******************************************************************************
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* Add the element given by its PID in the list of PID to extract and spawn
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* the decoding thread.
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* This function only modifies the table of selected es, but must NOT modify
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* the table of ES itself.
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******************************************************************************/
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int input_AddPgrmElem( input_thread_t *p_input, int i_current_id )
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{
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int i_es_loop, i_selected_es_loop;
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/* Since this function is intended to be called by interface, lock the
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* elementary stream structure. */
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vlc_mutex_lock( &p_input->es_lock );
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/* Find out which PID we need. */
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for( i_es_loop = 0; i_es_loop < INPUT_MAX_ES; i_es_loop++ )
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{
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if( p_input->p_es[i_es_loop].i_id == i_current_id )
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{
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if( p_input->p_es[i_es_loop].p_dec != NULL )
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{
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/* We already have a decoder for that PID. */
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vlc_mutex_unlock( &p_input->es_lock );
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intf_ErrMsg("input error: PID %d already selected\n",
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i_current_id);
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return( -1 );
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}
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intf_DbgMsg("Requesting selection of PID %d\n",
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i_current_id);
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/* Find a free spot in pp_selected_es. */
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for( i_selected_es_loop = 0; p_input->pp_selected_es[i_selected_es_loop] != NULL
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&& i_selected_es_loop < INPUT_MAX_SELECTED_ES; i_selected_es_loop++ );
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if( i_selected_es_loop == INPUT_MAX_SELECTED_ES )
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{
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/* array full */
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vlc_mutex_unlock( &p_input->es_lock );
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intf_ErrMsg("input error: MAX_SELECTED_ES reached: try increasing it in config.h\n");
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return( -1 );
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}
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/* Don't decode PSI streams ! */
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if( p_input->p_es[i_es_loop].b_psi )
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{
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intf_ErrMsg("input_error: trying to decode PID %d which is the one of a PSI\n", i_current_id);
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vlc_mutex_unlock( &p_input->es_lock );
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return( -1 );
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}
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else
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{
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/* Spawn the decoder. */
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switch( p_input->p_es[i_es_loop].i_type )
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{
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case AC3_AUDIO_ES:
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/* Spawn ac3 thread */
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if ( ((ac3dec_thread_t *)(p_input->p_es[i_es_loop].p_dec) =
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ac3dec_CreateThread(p_input)) == NULL )
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{
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intf_ErrMsg( "Could not start ac3 decoder\n" );
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vlc_mutex_unlock( &p_input->es_lock );
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return( -1 );
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}
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break;
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case MPEG1_AUDIO_ES:
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case MPEG2_AUDIO_ES:
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/* Spawn audio thread. */
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if( ((adec_thread_t*)(p_input->p_es[i_es_loop].p_dec) =
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adec_CreateThread( p_input )) == NULL )
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{
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intf_ErrMsg("Could not start audio decoder\n");
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vlc_mutex_unlock( &p_input->es_lock );
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return( -1 );
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}
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break;
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case MPEG1_VIDEO_ES:
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case MPEG2_VIDEO_ES:
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/* Spawn video thread. */
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/* Les 2 pointeurs NULL ne doivent pas etre NULL sinon on segfault !!!! */
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#ifdef OLD_DECODER
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if( ((vdec_thread_t*)(p_input->p_es[i_es_loop].p_dec) =
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vdec_CreateThread( p_input )) == NULL )
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#else
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if( ((vpar_thread_t*)(p_input->p_es[i_es_loop].p_dec) =
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vpar_CreateThread( p_input )) == NULL )
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#endif
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{
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#ifdef OLD_DECODER
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intf_ErrMsg("Could not start video decoder\n");
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#else
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intf_ErrMsg("Could not start video parser\n");
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#endif
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vlc_mutex_unlock( &p_input->es_lock );
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return( -1 );
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}
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break;
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default:
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/* That should never happen. */
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intf_DbgMsg("input error: unknown stream type (0x%.2x)\n",
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p_input->p_es[i_es_loop].i_type);
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vlc_mutex_unlock( &p_input->es_lock );
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return( -1 );
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break;
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}
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/* Initialise the demux */
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p_input->p_es[i_es_loop].p_pes_packet = NULL;
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p_input->p_es[i_es_loop].i_continuity_counter = 0xFF;
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p_input->p_es[i_es_loop].b_random = 0;
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/* Mark stream to be demultiplexed. */
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intf_DbgMsg("Stream %d added in %d\n", i_current_id, i_selected_es_loop);
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p_input->pp_selected_es[i_selected_es_loop] = &p_input->p_es[i_es_loop];
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vlc_mutex_unlock( &p_input->es_lock );
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return( 0 );
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}
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}
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}
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/* We haven't found this PID in the current stream. */
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vlc_mutex_unlock( &p_input->es_lock );
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intf_ErrMsg("input error: can't find PID %d\n", i_current_id);
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return( -1 );
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}
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/******************************************************************************
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* input_DelPgrmElem: Stop the decoding of a program element
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******************************************************************************
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* Stop the extraction of the element given by its PID and kill the associated
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* decoder thread
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* This function only modifies the table of selected es, but must NOT modify
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* the table of ES itself.
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******************************************************************************/
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int input_DelPgrmElem( input_thread_t *p_input, int i_current_id )
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{
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int i_selected_es_loop, i_last_selected;
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/* Since this function is intended to be called by interface, lock the
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structure. */
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vlc_mutex_lock( &p_input->es_lock );
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/* Find out which PID we need. */
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for( i_selected_es_loop = 0; i_selected_es_loop < INPUT_MAX_SELECTED_ES;
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i_selected_es_loop++ )
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{
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if( p_input->pp_selected_es[i_selected_es_loop] )
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{
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if( p_input->pp_selected_es[i_selected_es_loop]->i_id == i_current_id )
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{
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if( !(p_input->pp_selected_es[i_selected_es_loop]->p_dec) )
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{
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/* We don't have a decoder for that PID. */
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vlc_mutex_unlock( &p_input->es_lock );
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intf_ErrMsg("input error: PID %d already deselected\n",
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i_current_id);
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return( -1 );
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}
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intf_DbgMsg("input debug: requesting termination of PID %d\n",
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i_current_id);
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/* Cancel the decoder. */
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switch( p_input->pp_selected_es[i_selected_es_loop]->i_type )
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{
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case AC3_AUDIO_ES:
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ac3dec_DestroyThread( (ac3dec_thread_t *)(p_input->pp_selected_es[i_selected_es_loop]->p_dec) );
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break;
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case MPEG1_AUDIO_ES:
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case MPEG2_AUDIO_ES:
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adec_DestroyThread( (adec_thread_t*)(p_input->pp_selected_es[i_selected_es_loop]->p_dec) );
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break;
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case MPEG1_VIDEO_ES:
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case MPEG2_VIDEO_ES:
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#ifdef OLD_DECODER
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vdec_DestroyThread( (vdec_thread_t*)(p_input->pp_selected_es[i_selected_es_loop]->p_dec) /*, NULL */ );
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#else
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vpar_DestroyThread( (vpar_thread_t*)(p_input->pp_selected_es[i_selected_es_loop]->p_dec) /*, NULL */ );
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#endif
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break;
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}
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/* Unmark stream. */
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p_input->pp_selected_es[i_selected_es_loop]->p_dec = NULL;
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/* Find last selected stream. */
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for( i_last_selected = i_selected_es_loop;
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p_input->pp_selected_es[i_last_selected]
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&& i_last_selected < INPUT_MAX_SELECTED_ES;
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i_last_selected++ );
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/* Exchange streams. */
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p_input->pp_selected_es[i_selected_es_loop] =
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p_input->pp_selected_es[i_last_selected];
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p_input->pp_selected_es[i_last_selected] = NULL;
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vlc_mutex_unlock( &p_input->es_lock );
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return( 0 );
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}
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}
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}
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/* We haven't found this PID in the current stream. */
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vlc_mutex_unlock( &p_input->es_lock );
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intf_ErrMsg("input error: can't find PID %d\n", i_current_id);
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return( -1 );
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}
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/******************************************************************************
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* input_IsElemRecv: Test if an element given by its PID is currently received
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******************************************************************************
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* Cannot return the position of the es in the pp_selected_es, for it can
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* change once we have released the lock
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******************************************************************************/
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boolean_t input_IsElemRecv( input_thread_t *p_input, int i_id )
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{
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boolean_t b_is_recv = 0;
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int i_index = 0;
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/* Since this function is intended to be called by interface, lock the
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structure. */
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vlc_mutex_lock( &p_input->es_lock );
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/* Scan the table */
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while( i_index < INPUT_MAX_SELECTED_ES && !p_input->pp_selected_es[i_index] )
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{
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if( p_input->pp_selected_es[i_index]->i_id == i_id )
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{
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b_is_recv = 1;
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break;
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}
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}
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/* Unlock the structure */
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vlc_mutex_unlock( &p_input->es_lock );
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return( b_is_recv );
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}
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