1 /*****************************************************************************
2 * util.c: Utility functions and exceptions management
3 *****************************************************************************
4 * Copyright (C) 2005 the VideoLAN team
7 * Authors: Olivier Aubert <olivier.aubert@liris.univ-lyon1.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
28 #include <vlc/mediacontrol.h>
30 #include <vlc_interface.h>
32 #include <vlc_input.h>
33 #include <vlc_demux.h>
37 #include "mediacontrol_internal.h"
39 #include <stdlib.h> /* malloc(), free() */
42 #include <errno.h> /* ENOMEM */
49 #ifdef HAVE_SYS_TIME_H
50 # include <sys/time.h>
52 #ifdef HAVE_SYS_TYPES_H
53 # include <sys/types.h>
56 /* FIXME: Need to stop accessing private input structures !! */
57 #include "input/input_internal.h"
59 vlc_int64_t private_mediacontrol_unit_convert( input_thread_t *p_input,
60 mediacontrol_PositionKey from,
61 mediacontrol_PositionKey to,
67 /* For all conversions, we need data from p_input */
73 case mediacontrol_MediaTime:
74 if( to == mediacontrol_ByteCount )
78 /* return value * 50 * p_input->stream.i_mux_rate / 1000; */
81 if( to == mediacontrol_SampleCount )
85 if( demux_Control( p_input->p->input.p_demux, DEMUX_GET_FPS, &f_fps ) || f_fps < 0.1 )
88 return( value * f_fps / 1000.0 );
91 /* See http://catb.org/~esr/jargon/html/entry/can-t-happen.html */
94 case mediacontrol_SampleCount:
98 if( demux_Control( p_input->p->input.p_demux, DEMUX_GET_FPS, &f_fps ) ||
102 if( to == mediacontrol_ByteCount )
106 /* return ( vlc_int64_t )( value * 50 * p_input->stream.i_mux_rate / f_fps ); */
110 if( to == mediacontrol_MediaTime )
111 return( vlc_int64_t )( value * 1000.0 / ( double )f_fps );
116 case mediacontrol_ByteCount:
121 // if( p_input->stream.i_mux_rate == 0 )
124 // /* Convert an offset into milliseconds. Taken from input_ext-intf.c.
125 // The 50 hardcoded constant comes from the definition of i_mux_rate :
126 // i_mux_rate : the rate we read the stream (in units of 50 bytes/s) ;
128 // if( to == mediacontrol_MediaTime )
129 // return ( vlc_int64_t )( 1000 * value / 50 / p_input->stream.i_mux_rate );
131 // if( to == mediacontrol_SampleCount )
134 // if( demux_Control( p_input->input.p_demux, DEMUX_GET_FPS, &f_fps ) || f_fps < 0.1 )
137 // return ( vlc_int64_t )( value * f_fps / 50 / p_input->stream.i_mux_rate );
146 /* Converts a mediacontrol_Position into a time in microseconds in
149 private_mediacontrol_position2microsecond( input_thread_t* p_input, const mediacontrol_Position * pos )
151 switch( pos->origin )
153 case mediacontrol_AbsolutePosition:
154 return ( 1000 * private_mediacontrol_unit_convert( p_input,
156 mediacontrol_MediaTime, /* to */
159 case mediacontrol_RelativePosition:
167 var_Get( p_input, "time", &val );
170 l_pos = 1000 * private_mediacontrol_unit_convert( p_input,
172 mediacontrol_MediaTime,
174 return val.i_time + l_pos;
177 case mediacontrol_ModuloPosition:
185 var_Get( p_input, "length", &val );
190 l_pos = ( 1000 * private_mediacontrol_unit_convert( p_input,
192 mediacontrol_MediaTime,
198 return l_pos % val.i_time;
205 mediacontrol_RGBPicture*
206 private_mediacontrol_RGBPicture__alloc( int datasize )
208 mediacontrol_RGBPicture* pic;
210 pic = ( mediacontrol_RGBPicture * )malloc( sizeof( mediacontrol_RGBPicture ) );
214 pic->size = datasize;
215 pic->data = ( char* )malloc( datasize * sizeof( char ) );
220 mediacontrol_RGBPicture__free( mediacontrol_RGBPicture* pic )
229 mediacontrol_PlaylistSeq*
230 private_mediacontrol_PlaylistSeq__alloc( int size )
232 mediacontrol_PlaylistSeq* ps;
234 ps =( mediacontrol_PlaylistSeq* )malloc( sizeof( mediacontrol_PlaylistSeq ) );
239 ps->data = ( char** )malloc( size * sizeof( char* ) );
244 mediacontrol_PlaylistSeq__free( mediacontrol_PlaylistSeq* ps )
249 for( i = 0 ; i < ps->size ; i++ )
257 mediacontrol_StreamInformation__free( mediacontrol_StreamInformation* p_si )
267 mediacontrol_Exception*
268 mediacontrol_exception_create( void )
270 mediacontrol_Exception* exception;
272 exception = ( mediacontrol_Exception* )malloc( sizeof( mediacontrol_Exception ) );
273 mediacontrol_exception_init( exception );
278 mediacontrol_exception_init( mediacontrol_Exception *exception )
283 exception->message = NULL;
288 mediacontrol_exception_cleanup( mediacontrol_Exception *exception )
291 free( exception->message );
295 mediacontrol_exception_free( mediacontrol_Exception *exception )
297 mediacontrol_exception_cleanup( exception );
301 mediacontrol_RGBPicture*
302 private_mediacontrol_createRGBPicture( int i_width, int i_height, long i_chroma, vlc_int64_t l_date,
303 char* p_data, int i_datasize )
305 mediacontrol_RGBPicture *retval;
307 retval = private_mediacontrol_RGBPicture__alloc( i_datasize );
310 retval->width = i_width;
311 retval->height = i_height;
312 retval->type = i_chroma;
313 retval->date = l_date;
314 retval->size = i_datasize;
315 memcpy( retval->data, p_data, i_datasize );