record.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
- /*****************************************************************************
- * record.c
- *****************************************************************************
- * Copyright (C) 2008 Laurent Aimar
- * $Id: 2ab138fd452b81f52ffb4bc8a26c515c69b5e905 $
- *
- * Author: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
- *
- * 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 <assert.h>
- #include <vlc_stream.h>
- #include <vlc_input.h>
- #include <vlc_charset.h>
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Open ( vlc_object_t * );
- static void Close( vlc_object_t * );
- vlc_module_begin()
- set_category( CAT_INPUT )
- set_subcategory( SUBCAT_INPUT_STREAM_FILTER )
- set_description( N_("Internal stream record") )
- set_capability( "stream_filter", 0 )
- set_callbacks( Open, Close )
- vlc_module_end()
- /*****************************************************************************
- *
- *****************************************************************************/
- struct stream_sys_t
- {
- bool b_active;
- FILE *f; /* TODO it could be replaced by access_output_t one day */
- bool b_error;
- };
- /****************************************************************************
- * Local prototypes
- ****************************************************************************/
- static int Read ( stream_t *, void *p_read, unsigned int i_read );
- static int Peek ( stream_t *, const uint8_t **pp_peek, unsigned int i_peek );
- static int Control( stream_t *, int i_query, va_list );
- static int Start ( stream_t *, const char *psz_extension );
- static int Stop ( stream_t * );
- static void Write ( stream_t *, const uint8_t *p_buffer, size_t i_buffer );
- /****************************************************************************
- * Open
- ****************************************************************************/
- static int Open ( vlc_object_t *p_this )
- {
- stream_t *s = (stream_t*)p_this;
- stream_sys_t *p_sys;
- /* */
- s->p_sys = p_sys = malloc( sizeof( *p_sys ) );
- if( !p_sys )
- return VLC_ENOMEM;
- p_sys->b_active = false;
- /* */
- s->pf_read = Read;
- s->pf_peek = Peek;
- s->pf_control = Control;
- return VLC_SUCCESS;
- }
- /****************************************************************************
- * Close
- ****************************************************************************/
- static void Close( vlc_object_t *p_this )
- {
- stream_t *s = (stream_t*)p_this;
- stream_sys_t *p_sys = s->p_sys;
- if( p_sys->b_active )
- Stop( s );
- free( p_sys );
- }
- /****************************************************************************
- * Stream filters functions
- ****************************************************************************/
- static int Read( stream_t *s, void *p_read, unsigned int i_read )
- {
- stream_sys_t *p_sys = s->p_sys;
- void *p_record = p_read;
- /* Allocate a temporary buffer for record when no p_read */
- if( p_sys->b_active && !p_record )
- p_record = malloc( i_read );
- /* */
- const int i_record = stream_Read( s->p_source, p_record, i_read );
- /* Dump read data */
- if( p_sys->b_active )
- {
- if( p_record && i_record > 0 )
- Write( s, p_record, i_record );
- if( !p_read )
- free( p_record );
- }
- return i_record;
- }
- static int Peek( stream_t *s, const uint8_t **pp_peek, unsigned int i_peek )
- {
- return stream_Peek( s->p_source, pp_peek, i_peek );
- }
- static int Control( stream_t *s, int i_query, va_list args )
- {
- if( i_query != STREAM_SET_RECORD_STATE )
- return stream_vaControl( s->p_source, i_query, args );
- bool b_active = (bool)va_arg( args, int );
- const char *psz_extension = NULL;
- if( b_active )
- psz_extension = (const char*)va_arg( args, const char* );
- if( !s->p_sys->b_active == !b_active )
- return VLC_SUCCESS;
- if( b_active )
- return Start( s, psz_extension );
- else
- return Stop( s );
- }
- /****************************************************************************
- * Helpers
- ****************************************************************************/
- static int Start( stream_t *s, const char *psz_extension )
- {
- stream_sys_t *p_sys = s->p_sys;
- char *psz_file;
- FILE *f;
- /* */
- if( !psz_extension )
- psz_extension = "dat";
- /* Retreive path */
- char *psz_path = var_CreateGetString( s, "input-record-path" );
- if( !psz_path || *psz_path == ' ' )
- {
- free( psz_path );
- psz_path = strdup( config_GetHomeDir() );
- }
- if( !psz_path )
- return VLC_ENOMEM;
- /* Create file name
- * TODO allow prefix configuration */
- psz_file = input_CreateFilename( VLC_OBJECT(s), psz_path, INPUT_RECORD_PREFIX, psz_extension );
- free( psz_path );
- if( !psz_file )
- return VLC_ENOMEM;
- f = utf8_fopen( psz_file, "wb" );
- if( !f )
- {
- free( psz_file );
- return VLC_EGENERIC;
- }
- msg_Dbg( s, "Recording into %s", psz_file );
- free( psz_file );
- /* */
- p_sys->f = f;
- p_sys->b_active = true;
- p_sys->b_error = false;
- return VLC_SUCCESS;
- }
- static int Stop( stream_t *s )
- {
- stream_sys_t *p_sys = s->p_sys;
- assert( p_sys->b_active );
- msg_Dbg( s, "Recording completed" );
- fclose( p_sys->f );
- p_sys->b_active = false;
- return VLC_SUCCESS;
- }
- static void Write( stream_t *s, const uint8_t *p_buffer, size_t i_buffer )
- {
- stream_sys_t *p_sys = s->p_sys;
- assert( p_sys->b_active );
- if( i_buffer > 0 )
- {
- const bool b_previous_error = p_sys->b_error;
- const size_t i_written = fwrite( p_buffer, 1, i_buffer, p_sys->f );
- p_sys->b_error = i_written != i_buffer;
- /* TODO maybe a intf_UserError or something like that ? */
- if( p_sys->b_error && !b_previous_error )
- msg_Err( s, "Failed to record data (begin)" );
- else if( !p_sys->b_error && b_previous_error )
- msg_Err( s, "Failed to record data (end)" );
- }
- }