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 *****************************************************************************/
24 #include <mediacontrol_internal.h>
25 #include <vlc/mediacontrol.h>
30 #include <vlc_demux.h>
34 #define HAS_SNAPSHOT 1
40 #include <stdlib.h> /* malloc(), free() */
43 #include <errno.h> /* ENOMEM */
50 #ifdef HAVE_SYS_TIME_H
51 # include <sys/time.h>
53 #ifdef HAVE_SYS_TYPES_H
54 # include <sys/types.h>
57 #define RAISE( c, m ) exception->code = c; \
58 exception->message = strdup(m);
60 vlc_int64_t mediacontrol_unit_convert( input_thread_t *p_input,
61 mediacontrol_PositionKey from,
62 mediacontrol_PositionKey to,
68 /* For all conversions, we need data from p_input */
74 case mediacontrol_MediaTime:
75 if( to == mediacontrol_ByteCount )
79 /* return value * 50 * p_input->stream.i_mux_rate / 1000; */
82 if( to == mediacontrol_SampleCount )
86 if( demux2_Control( p_input->input.p_demux, DEMUX_GET_FPS, &f_fps ) || f_fps < 0.1 )
89 return( value * f_fps / 1000.0 );
92 /* See http://catb.org/~esr/jargon/html/entry/can't-happen.html */
95 case mediacontrol_SampleCount:
99 if( demux2_Control( p_input->input.p_demux, DEMUX_GET_FPS, &f_fps ) ||
103 if( to == mediacontrol_ByteCount )
107 /* return ( vlc_int64_t )( value * 50 * p_input->stream.i_mux_rate / f_fps ); */
111 if( to == mediacontrol_MediaTime )
112 return( vlc_int64_t )( value * 1000.0 / ( double )f_fps );
117 case mediacontrol_ByteCount:
122 // if( p_input->stream.i_mux_rate == 0 )
125 // /* Convert an offset into milliseconds. Taken from input_ext-intf.c.
126 // The 50 hardcoded constant comes from the definition of i_mux_rate :
127 // i_mux_rate : the rate we read the stream (in units of 50 bytes/s) ;
129 // if( to == mediacontrol_MediaTime )
130 // return ( vlc_int64_t )( 1000 * value / 50 / p_input->stream.i_mux_rate );
132 // if( to == mediacontrol_SampleCount )
135 // if( demux2_Control( p_input->input.p_demux, DEMUX_GET_FPS, &f_fps ) || f_fps < 0.1 )
138 // return ( vlc_int64_t )( value * f_fps / 50 / p_input->stream.i_mux_rate );
147 /* Converts a mediacontrol_Position into a time in microseconds in
150 mediacontrol_position2microsecond( input_thread_t* p_input, const mediacontrol_Position * pos )
152 switch( pos->origin )
154 case mediacontrol_AbsolutePosition:
155 return ( 1000 * mediacontrol_unit_convert( p_input,
157 mediacontrol_MediaTime, /* to */
160 case mediacontrol_RelativePosition:
168 var_Get( p_input, "time", &val );
171 l_pos = 1000 * mediacontrol_unit_convert( p_input,
173 mediacontrol_MediaTime,
175 return val.i_time + l_pos;
178 case mediacontrol_ModuloPosition:
186 var_Get( p_input, "length", &val );
191 l_pos = ( 1000 * mediacontrol_unit_convert( p_input,
193 mediacontrol_MediaTime,
199 return l_pos % val.i_time;
206 mediacontrol_RGBPicture*
207 mediacontrol_RGBPicture__alloc( int datasize )
209 mediacontrol_RGBPicture* pic;
211 pic = ( mediacontrol_RGBPicture * )malloc( sizeof( mediacontrol_RGBPicture ) );
215 pic->size = datasize;
216 pic->data = ( char* )malloc( datasize * sizeof( char ) );
221 mediacontrol_RGBPicture__free( mediacontrol_RGBPicture* pic )
228 mediacontrol_PlaylistSeq*
229 mediacontrol_PlaylistSeq__alloc( int size )
231 mediacontrol_PlaylistSeq* ps;
233 ps =( mediacontrol_PlaylistSeq* )malloc( sizeof( mediacontrol_PlaylistSeq ) );
238 ps->data = ( char** )malloc( size * sizeof( char* ) );
243 mediacontrol_PlaylistSeq__free( mediacontrol_PlaylistSeq* ps )
248 for( i = 0 ; i < ps->size ; i++ )
255 mediacontrol_Exception*
256 mediacontrol_exception_init( mediacontrol_Exception *exception )
258 if( exception == NULL )
260 exception = ( mediacontrol_Exception* )malloc( sizeof( mediacontrol_Exception ) );
264 exception->message = NULL;
269 mediacontrol_exception_free( mediacontrol_Exception *exception )
274 free( exception->message );
278 mediacontrol_RGBPicture*
279 _mediacontrol_createRGBPicture( int i_width, int i_height, long i_chroma, vlc_int64_t l_date,
280 char* p_data, int i_datasize )
282 mediacontrol_RGBPicture *retval;
284 retval = mediacontrol_RGBPicture__alloc( i_datasize );
287 retval->width = i_width;
288 retval->height = i_height;
289 retval->type = i_chroma;
290 retval->date = l_date;
291 retval->size = i_datasize;
292 memcpy( retval->data, p_data, i_datasize );