/***************************************************************************** * input_dec.c: Functions for the management of decoders ***************************************************************************** * Copyright (C) 1999-2001 VideoLAN * $Id: input_dec.c,v 1.41 2002/07/31 20:56:52 sam Exp $ * * Authors: Christophe Massiot * * 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 #include /* memcpy(), memset() */ #include /* off_t */ #include #include "stream_control.h" #include "input_ext-dec.h" #include "input_ext-intf.h" #include "input_ext-plugins.h" static decoder_fifo_t * CreateDecoderFifo( input_thread_t *, es_descriptor_t * ); static void DeleteDecoderFifo( decoder_fifo_t * ); /***************************************************************************** * input_RunDecoder: spawns a new decoder thread *****************************************************************************/ decoder_fifo_t * input_RunDecoder( input_thread_t * p_input, es_descriptor_t * p_es ) { char * psz_plugin; decoder_fifo_t *p_fifo; /* Create the decoder configuration structure */ p_fifo = CreateDecoderFifo( p_input, p_es ); if( p_fifo == NULL ) { msg_Err( p_input, "could not create decoder fifo" ); return NULL; } /* Get a suitable module */ psz_plugin = config_GetPsz( p_fifo, "codec" ); p_fifo->p_module = module_Need( p_fifo, "decoder", psz_plugin ); if( psz_plugin ) free( psz_plugin ); if( p_fifo->p_module == NULL ) { msg_Err( p_fifo, "no suitable decoder module for fourcc `%4.4s'", (char*)&p_fifo->i_fourcc ); DeleteDecoderFifo( p_fifo ); vlc_object_destroy( p_fifo ); return NULL; } /* Spawn the decoder thread */ if( vlc_thread_create( p_fifo, "decoder", p_fifo->pf_run, 0 ) ) { msg_Err( p_fifo, "cannot spawn decoder thread \"%s\"", p_fifo->p_module->psz_object_name ); module_Unneed( p_fifo, p_fifo->p_module ); return NULL; } p_input->stream.b_changed = 1; return p_fifo; } /***************************************************************************** * input_EndDecoder: kills a decoder thread and waits until it's finished *****************************************************************************/ void input_EndDecoder( input_thread_t * p_input, es_descriptor_t * p_es ) { int i_dummy; p_es->p_decoder_fifo->b_die = 1; /* Make sure the thread leaves the NextDataPacket() function by * sending it a few null packets. */ for( i_dummy = 0; i_dummy < PADDING_PACKET_NUMBER; i_dummy++ ) { input_NullPacket( p_input, p_es ); } if( p_es->p_pes != NULL ) { input_DecodePES( p_es->p_decoder_fifo, p_es->p_pes ); } /* Waiting for the thread to exit */ /* I thought that unlocking was better since thread join can be long * but it actually creates late pictures and freezes --stef */ // vlc_mutex_unlock( &p_input->stream.stream_lock ); vlc_thread_join( p_es->p_decoder_fifo ); // vlc_mutex_lock( &p_input->stream.stream_lock ); /* Delete decoder configuration */ DeleteDecoderFifo( p_es->p_decoder_fifo ); /* Unneed module */ module_Unneed( p_es->p_decoder_fifo, p_es->p_decoder_fifo->p_module ); /* Delete the fifo */ vlc_object_destroy( p_es->p_decoder_fifo ); /* Tell the input there is no more decoder */ p_es->p_decoder_fifo = NULL; p_input->stream.b_changed = 1; } /***************************************************************************** * input_DecodePES ***************************************************************************** * Put a PES in the decoder's fifo. *****************************************************************************/ void input_DecodePES( decoder_fifo_t * p_decoder_fifo, pes_packet_t * p_pes ) { vlc_mutex_lock( &p_decoder_fifo->data_lock ); p_pes->p_next = NULL; *p_decoder_fifo->pp_last = p_pes; p_decoder_fifo->pp_last = &p_pes->p_next; p_decoder_fifo->i_depth++; /* Warn the decoder that it's got work to do. */ vlc_cond_signal( &p_decoder_fifo->data_wait ); vlc_mutex_unlock( &p_decoder_fifo->data_lock ); } /***************************************************************************** * input_EscapeDiscontinuity: send a NULL packet to the decoders *****************************************************************************/ void input_EscapeDiscontinuity( input_thread_t * p_input ) { int i_es, i; for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ ) { es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es]; if( p_es->p_decoder_fifo != NULL ) { for( i = 0; i < PADDING_PACKET_NUMBER; i++ ) { input_NullPacket( p_input, p_es ); } } } } /***************************************************************************** * input_EscapeAudioDiscontinuity: send a NULL packet to the audio decoders *****************************************************************************/ void input_EscapeAudioDiscontinuity( input_thread_t * p_input ) { int i_es, i; for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ ) { es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es]; if( p_es->p_decoder_fifo != NULL && p_es->i_cat == AUDIO_ES ) { for( i = 0; i < PADDING_PACKET_NUMBER; i++ ) { input_NullPacket( p_input, p_es ); } } } } /***************************************************************************** * CreateDecoderFifo: create a decoder_fifo_t *****************************************************************************/ static decoder_fifo_t * CreateDecoderFifo( input_thread_t * p_input, es_descriptor_t * p_es ) { decoder_fifo_t * p_fifo; /* Decoder FIFO */ p_fifo = vlc_object_create( p_input, VLC_OBJECT_DECODER ); if( p_fifo == NULL ) { msg_Err( p_input, "out of memory" ); return NULL; } /* Select a new ES */ p_input->stream.i_selected_es_number++; p_input->stream.pp_selected_es = realloc( p_input->stream.pp_selected_es, p_input->stream.i_selected_es_number * sizeof(es_descriptor_t *) ); if( p_input->stream.pp_selected_es == NULL ) { msg_Err( p_input, "out of memory" ); vlc_object_destroy( p_fifo ); return NULL; } p_input->stream.pp_selected_es[p_input->stream.i_selected_es_number - 1] = p_es; /* Initialize the p_fifo structure */ vlc_mutex_init( p_input, &p_fifo->data_lock ); vlc_cond_init( p_input, &p_fifo->data_wait ); p_es->p_decoder_fifo = p_fifo; p_fifo->i_id = p_es->i_id; p_fifo->i_fourcc = p_es->i_fourcc; p_fifo->p_demux_data = p_es->p_demux_data; p_fifo->p_stream_ctrl = &p_input->stream.control; p_fifo->p_first = NULL; p_fifo->pp_last = &p_fifo->p_first; p_fifo->i_depth = 0; p_fifo->b_die = p_fifo->b_error = 0; p_fifo->p_packets_mgt = p_input->p_method_data; vlc_object_attach( p_fifo, p_input ); return p_fifo; } /***************************************************************************** * DeleteDecoderFifo: destroy a decoder_fifo_t *****************************************************************************/ static void DeleteDecoderFifo( decoder_fifo_t * p_fifo ) { vlc_object_detach_all( p_fifo ); msg_Dbg( p_fifo, "killing decoder for 0x%x, fourcc `%4.4s', %d PES in FIFO", p_fifo->i_id, (char*)&p_fifo->i_fourcc, p_fifo->i_depth ); /* Free all packets still in the decoder fifo. */ input_DeletePES( p_fifo->p_packets_mgt, p_fifo->p_first ); /* Destroy the lock and cond */ vlc_cond_destroy( &p_fifo->data_wait ); vlc_mutex_destroy( &p_fifo->data_lock ); }