display.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:7k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * display.c: display stream output module
- *****************************************************************************
- * Copyright (C) 2001, 2002 the VideoLAN team
- * $Id: 5fa81ba84d3dd1f90245abb489b1f3f88792b26b $
- *
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include <vlc_plugin.h>
- #include <vlc_input.h>
- #include <vlc_sout.h>
- #include <vlc_block.h>
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- #define AUDIO_TEXT N_("Enable audio")
- #define AUDIO_LONGTEXT N_( "Enable/disable audio rendering." )
- #define VIDEO_TEXT N_("Enable video")
- #define VIDEO_LONGTEXT N_( "Enable/disable video rendering." )
- #define DELAY_TEXT N_("Delay")
- #define DELAY_LONGTEXT N_( "Introduces a delay in the display of the stream." )
- static int Open ( vlc_object_t * );
- static void Close( vlc_object_t * );
- #define SOUT_CFG_PREFIX "sout-display-"
- vlc_module_begin ()
- set_shortname( N_("Display"))
- set_description( N_("Display stream output") )
- set_capability( "sout stream", 50 )
- add_shortcut( "display" )
- set_category( CAT_SOUT )
- set_subcategory( SUBCAT_SOUT_STREAM )
- add_bool( SOUT_CFG_PREFIX "audio", 1, NULL, AUDIO_TEXT,
- AUDIO_LONGTEXT, true )
- add_bool( SOUT_CFG_PREFIX "video", 1, NULL, VIDEO_TEXT,
- VIDEO_LONGTEXT, true )
- add_integer( SOUT_CFG_PREFIX "delay", 100, NULL, DELAY_TEXT,
- DELAY_LONGTEXT, true )
- set_callbacks( Open, Close )
- vlc_module_end ()
- /*****************************************************************************
- * Exported prototypes
- *****************************************************************************/
- static const char *const ppsz_sout_options[] = {
- "audio", "video", "delay", NULL
- };
- static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
- static int Del ( sout_stream_t *, sout_stream_id_t * );
- static int Send( sout_stream_t *, sout_stream_id_t *, block_t* );
- struct sout_stream_sys_t
- {
- input_thread_t *p_input;
- unsigned i_es;
- bool b_audio;
- bool b_video;
- mtime_t i_delay;
- };
- /*****************************************************************************
- * Open:
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- {
- sout_stream_t *p_stream = (sout_stream_t*)p_this;
- sout_stream_sys_t *p_sys;
- p_sys = malloc( sizeof( sout_stream_sys_t ) );
- if( p_sys == NULL )
- return VLC_ENOMEM;
- config_ChainParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options,
- p_stream->p_cfg );
- p_sys->p_input = NULL;
- p_sys->i_es = 0;
- p_sys->b_audio = var_GetBool( p_stream, SOUT_CFG_PREFIX"audio" );
- p_sys->b_video = var_GetBool( p_stream, SOUT_CFG_PREFIX "video" );
- p_sys->i_delay = var_GetInteger( p_stream, SOUT_CFG_PREFIX "delay" );
- p_sys->i_delay *= 1000;
- p_stream->pf_add = Add;
- p_stream->pf_del = Del;
- p_stream->pf_send = Send;
- p_stream->p_sys = p_sys;
- /* update p_sout->i_out_pace_nocontrol */
- p_stream->p_sout->i_out_pace_nocontrol++;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Close:
- *****************************************************************************/
- static void Close( vlc_object_t * p_this )
- {
- sout_stream_t *p_stream = (sout_stream_t*)p_this;
- sout_stream_sys_t *p_sys = p_stream->p_sys;
- /* update p_sout->i_out_pace_nocontrol */
- p_stream->p_sout->i_out_pace_nocontrol--;
- free( p_sys );
- }
- struct sout_stream_id_t
- {
- decoder_t *p_dec;
- };
- static sout_stream_id_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
- {
- sout_stream_sys_t *p_sys = p_stream->p_sys;
- sout_stream_id_t *id;
- if( ( p_fmt->i_cat == AUDIO_ES && !p_sys->b_audio )||
- ( p_fmt->i_cat == VIDEO_ES && !p_sys->b_video ) )
- {
- return NULL;
- }
- id = malloc( sizeof( sout_stream_id_t ) );
- if( id == NULL )
- return NULL;
- if( p_sys->i_es == 0 )
- {
- p_sys->p_input = vlc_object_find( p_stream, VLC_OBJECT_INPUT,
- FIND_PARENT );
- if( p_sys->p_input == NULL )
- {
- msg_Err( p_stream, "cannot find input" );
- free( id );
- return NULL;
- }
- }
- id->p_dec = input_DecoderNew( p_sys->p_input, p_fmt, NULL, NULL );
- if( id->p_dec == NULL )
- {
- msg_Err( p_stream, "cannot create decoder for fcc=`%4.4s'",
- (char*)&p_fmt->i_codec );
- free( id );
- if( p_sys->i_es == 0 )
- vlc_object_release( p_sys->p_input );
- return NULL;
- }
- p_sys->i_es++;
- return id;
- }
- static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
- {
- input_DecoderDelete( id->p_dec );
- if( --p_stream->p_sys->i_es == 0)
- vlc_object_release( p_stream->p_sys->p_input );
- free( id );
- return VLC_SUCCESS;
- }
- static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
- block_t *p_buffer )
- {
- sout_stream_sys_t *p_sys = p_stream->p_sys;
- while( p_buffer )
- {
- block_t *p_next = p_buffer->p_next;
- p_buffer->p_next = NULL;
- if( id->p_dec && p_buffer->i_buffer > 0 )
- {
- if( p_buffer->i_dts <= 0 )
- p_buffer->i_dts= 0;
- else
- p_buffer->i_dts += p_sys->i_delay;
- if( p_buffer->i_pts <= 0 )
- p_buffer->i_pts= 0;
- else
- p_buffer->i_pts += p_sys->i_delay;
- input_DecoderDecode( id->p_dec, p_buffer, false );
- }
- p_buffer = p_next;
- }
- return VLC_SUCCESS;
- }