display.c
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上传日期:2009-03-27
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文件大小:6k
- /*****************************************************************************
- * display.c: display stream output module
- *****************************************************************************
- * Copyright (C) 2001, 2002 VideoLAN
- * $Id: display.c 8265 2004-07-24 10:24:11Z gbazin $
- *
- * 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <stdlib.h>
- #include <string.h>
- #include <vlc/vlc.h>
- #include <vlc/input.h>
- #include <vlc/sout.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_description( _("Display stream output") );
- set_capability( "sout stream", 50 );
- add_shortcut( "display" );
- add_bool( SOUT_CFG_PREFIX "audio", 1, NULL, AUDIO_TEXT,
- AUDIO_LONGTEXT, VLC_TRUE );
- add_bool( SOUT_CFG_PREFIX "video", 1, NULL, VIDEO_TEXT,
- VIDEO_LONGTEXT, VLC_TRUE );
- add_integer( SOUT_CFG_PREFIX "delay", 100, NULL, DELAY_TEXT,
- DELAY_LONGTEXT, VLC_TRUE );
- set_callbacks( Open, Close );
- vlc_module_end();
- /*****************************************************************************
- * Exported prototypes
- *****************************************************************************/
- static const char *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;
- vlc_bool_t b_audio;
- vlc_bool_t 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;
- vlc_value_t val;
- sout_CfgParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options,
- p_stream->p_cfg );
- p_sys = malloc( sizeof( sout_stream_sys_t ) );
- p_sys->p_input = vlc_object_find( p_stream, VLC_OBJECT_INPUT,
- FIND_ANYWHERE );
- if( !p_sys->p_input )
- {
- msg_Err( p_stream, "cannot find p_input" );
- free( p_sys );
- return VLC_EGENERIC;
- }
- var_Get( p_stream, SOUT_CFG_PREFIX "audio", &val );
- p_sys->b_audio = val.b_bool;
- var_Get( p_stream, SOUT_CFG_PREFIX "video", &val );
- p_sys->b_video = val.b_bool;
- var_Get( p_stream, SOUT_CFG_PREFIX "delay", &val );
- p_sys->i_delay = (int64_t)val.i_int * 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--;
- vlc_object_release( p_sys->p_input );
- 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 ) );
- id->p_dec = input_DecoderNew( p_sys->p_input, p_fmt, VLC_TRUE );
- if( id->p_dec == NULL )
- {
- msg_Err( p_stream, "cannot create decoder for fcc=`%4.4s'",
- (char*)&p_fmt->i_codec );
- free( id );
- return NULL;
- }
- return id;
- }
- static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
- {
- input_DecoderDelete( id->p_dec );
- 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 );
- }
- p_buffer = p_next;
- }
- return VLC_SUCCESS;
- }