include/vlc_config.h

   1 /*****************************************************************************
   2  * vlc_config.h: limits and configuration
   3  * Defines all compilation-time configuration constants and size limits
   4  *****************************************************************************
   5  * Copyright (C) 1999-2003 the VideoLAN team
   6  *
   7  * Authors: Vincent Seguin <seguin@via.ecp.fr>
   8  *          Samuel Hocevar <sam@via.ecp.fr>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /* Conventions regarding names of symbols and variables
  26  * ----------------------------------------------------
  27  *
  28  * - Symbols should begin with a prefix indicating in which module they are
  29  *   used, such as INTF_, VOUT_ or AOUT_.
  30  */
  31
  32 /*****************************************************************************
  33  * General configuration
  34  *****************************************************************************/
  35
  36 #define CLOCK_FREQ 1000000
  37
  38
  39 /* When creating or destroying threads in blocking mode, delay to poll thread
  40  * status */
  41 #define THREAD_SLEEP                    ((mtime_t)(0.010*CLOCK_FREQ))
  42
  43 /*****************************************************************************
  44  * Interface configuration
  45  *****************************************************************************/
  46
  47 /* Base delay in micro second for interface sleeps */
  48 #define INTF_IDLE_SLEEP                 ((mtime_t)(0.050*CLOCK_FREQ))
  49
  50 /* Step for changing gamma, and minimum and maximum values */
  51 #define INTF_GAMMA_STEP                 .1
  52 #define INTF_GAMMA_LIMIT                3
  53
  54 /*****************************************************************************
  55  * Input thread configuration
  56  *****************************************************************************/
  57
  58 #define DEFAULT_INPUT_ACTIVITY 1
  59 #define TRANSCODE_ACTIVITY 10
  60
  61 /* Used in ErrorThread */
  62 #define INPUT_IDLE_SLEEP                ((mtime_t)(0.100*CLOCK_FREQ))
  63
  64 /* Time to wait in case of read error */
  65 #define INPUT_ERROR_SLEEP               ((mtime_t)(0.10*CLOCK_FREQ))
  66
  67 /* Number of read() calls needed until we check the file size through
  68  * fstat() */
  69 #define INPUT_FSTAT_NB_READS            10
  70
  71 /*
  72  * General limitations
  73  */
  74
  75 /* Duration between the time we receive the data packet, and the time we will
  76  * mark it to be presented */
  77 #define DEFAULT_PTS_DELAY               (mtime_t)(.3*CLOCK_FREQ)
  78
  79 /* DVD and VCD devices */
  80 #if !defined( WIN32 ) && !defined( UNDER_CE )
  81 #   define CD_DEVICE      "/dev/cdrom"
  82 #   define DVD_DEVICE     "/dev/dvd"
  83 #else
  84 #   define CD_DEVICE      "D:"
  85 #   define DVD_DEVICE     NULL
  86 #endif
  87 #define VCD_DEVICE        CD_DEVICE
  88 #define CDAUDIO_DEVICE    CD_DEVICE
  89
  90 /*****************************************************************************
  91  * Audio configuration
  92  *****************************************************************************/
  93
  94 /* Volume */
  95 /* If you are coding an interface, please see src/audio_output/intf.c */
  96 #define AOUT_VOLUME_DEFAULT             256
  97 #define AOUT_VOLUME_STEP                32
  98 #define AOUT_VOLUME_MAX                 1024
  99 #define AOUT_VOLUME_MIN                 0
 100
 101 /* Max number of pre-filters per input, and max number of post-filters */
 102 #define AOUT_MAX_FILTERS                10
 103
 104 /* Max number of inputs */
 105 #define AOUT_MAX_INPUTS                 5
 106
 107 /* Buffers which arrive in advance of more than AOUT_MAX_ADVANCE_TIME
 108  * will be considered as bogus and be trashed */
 109 #define AOUT_MAX_ADVANCE_TIME           (mtime_t)(DEFAULT_PTS_DELAY * 5)
 110
 111 /* Buffers which arrive in advance of more than AOUT_MAX_PREPARE_TIME
 112  * will cause the calling thread to sleep */
 113 #define AOUT_MAX_PREPARE_TIME           (mtime_t)(.5*CLOCK_FREQ)
 114
 115 /* Buffers which arrive after pts - AOUT_MIN_PREPARE_TIME will be trashed
 116  * to avoid too heavy resampling */
 117 #define AOUT_MIN_PREPARE_TIME           (mtime_t)(.04*CLOCK_FREQ)
 118
 119 /* Max acceptable delay between the coded PTS and the actual presentation
 120  * time, without resampling */
 121 #define AOUT_PTS_TOLERANCE              (mtime_t)(.04*CLOCK_FREQ)
 122
 123 /* Max acceptable resampling (in %) */
 124 #define AOUT_MAX_RESAMPLING             10
 125
 126 /*****************************************************************************
 127  * Video configuration
 128  *****************************************************************************/
 129
 130 /*
 131  * Default settings for video output threads
 132  */
 133
 134 /* Multiplier value for aspect ratio calculation (2^7 * 3^3 * 5^3) */
 135 #define VOUT_ASPECT_FACTOR              432000
 136
 137 /* Maximum width of a scaled source picture - this should be relatively high,
 138  * since higher stream values will result in no display at all. */
 139 #define VOUT_MAX_WIDTH                  4096
 140
 141 /* Number of planes in a picture */
 142 #define VOUT_MAX_PLANES                 5
 143
 144 /* Video heap size - remember that a decompressed picture is big
 145  * (~1 Mbyte) before using huge values */
 146 #define VOUT_MAX_PICTURES               8
 147
 148 /* Minimum number of direct pictures the video output will accept without
 149  * creating additional pictures in system memory */
 150 #define VOUT_MIN_DIRECT_PICTURES        6
 151
 152 /* Number of simultaneous subpictures */
 153 #define VOUT_MAX_SUBPICTURES            8
 154
 155 /* Statistics are displayed every n loops (=~ pictures) */
 156 #define VOUT_STATS_NB_LOOPS             100
 157
 158 /*
 159  * Time settings
 160  */
 161
 162 /* Time during which the thread will sleep if it has nothing to
 163  * display (in micro-seconds) */
 164 #define VOUT_IDLE_SLEEP                 ((int)(0.020*CLOCK_FREQ))
 165
 166 /* Maximum lap of time allowed between the beginning of rendering and
 167  * display. If, compared to the current date, the next image is too
 168  * late, the thread will perform an idle loop. This time should be
 169  * at least VOUT_IDLE_SLEEP plus the time required to render a few
 170  * images, to avoid trashing of decoded images */
 171 #define VOUT_DISPLAY_DELAY              ((int)(0.200*CLOCK_FREQ))
 172
 173 /* Pictures which are VOUT_BOGUS_DELAY or more in advance probably have
 174  * a bogus PTS and won't be displayed */
 175 #define VOUT_BOGUS_DELAY                ((mtime_t)(DEFAULT_PTS_DELAY * 30))
 176
 177 /* Delay (in microseconds) before an idle screen is displayed */
 178 #define VOUT_IDLE_DELAY                 (5*CLOCK_FREQ)
 179
 180 /* Number of pictures required to computes the FPS rate */
 181 #define VOUT_FPS_SAMPLES                20
 182
 183 /* Better be in advance when awakening than late... */
 184 #define VOUT_MWAIT_TOLERANCE            ((mtime_t)(0.020*CLOCK_FREQ))
 185
 186 /* Time to sleep when waiting for a buffer (from vout or the video fifo).
 187  * It should be approximately the time needed to perform a complete picture
 188  * loop. Since it only happens when the video heap is full, it does not need
 189  * to be too low, even if it blocks the decoder. */
 190 #define VOUT_OUTMEM_SLEEP               ((mtime_t)(0.020*CLOCK_FREQ))
 191
 192 /* The default video output window title */
 193 #define VOUT_TITLE                      "VLC"
 194
 195 /*****************************************************************************
 196  * Messages and console interfaces configuration
 197  *****************************************************************************/
 198
 199 /* Maximal size of a message to be stored in the mesage queue,
 200  * it is needed when vasprintf is not available */
 201 #define INTF_MAX_MSG_SIZE               512
 202
 203 /* Maximal size of the message queue - in case of overflow, all messages in the
 204  * queue are printed, but not sent to the threads */
 205 #define VLC_MSG_QSIZE                   256
 206
 207 /* Maximal depth of the object tree output by vlc_dumpstructure */
 208 #define MAX_DUMPSTRUCTURE_DEPTH         100