WildMidi_GetInfo

Section: WildMidi Programmer's Manual (3)
Updated: 10 March 2016
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NAME

WildMidi_GetInfo - get information on a midi

LIBRARY

libWildMidi

SYNOPSIS

#include <wildmidi_lib.h>

struct _WM_Info *WildMidi_GetInfo (midi *handle);

DESCRIPTION

Obtains information allowing you to determine song position, current options, and any copyright information.

handle: The identifier obtained from opening a midi file with WildMidi_Open(3) or WildMidi_OpenBuffer(3)

RETURN VALUE

On error returns NULL with an error message displayed to stderr.

Otherwise returns a pointer to a struct containing the information.

struct _WM_Info {
   char *copyright;
   uint32_t current_sample;
   uint32_t approx_total_samples;
   uint32_t total_midi_time;
   uint16_t mixer_options;
   uint32_t total_midi_time;
};

copyright: A pointer to a \0 terminated string containing any copyright MIDI events found while processing the MIDI file handle refers to. If more than one copyright event was found then each one is separated by \n

If copyright is NULL then no copyright MIDI events were found.

current_sample: This is the number of stereo samples libWildMidi has processed for the MIDI file referred to by handle. You can use this value to determine the current playing time by dividing this value by the rate given when libWildMidi was initialized by WildMidi_Init(3).

approx_total_samples: This is the total number of stereo samples libWildMidi expects to process. This can be used to obtain the total playing time by dividing this value by the rate given when libWildMidi was initialized by WildMidi_Init(3). Also when you divide current_sample by this value and multiplying by 100, you have the percentage currently processed.

total_midi_time: This is the total time of MIDI events in 1/1000's of a second. It differs from approx_total_samples in that it only states the total time within the MIDI file and does not take into account the extra bit of time to finish playing sampling smoothly.

mixer_options

WM_MO_LOG_VOLUME: Using curved volume settings instead of linear ones.

WM_MO_ENHANCED_RESAMPLING: The enhanced resampler is active

WM_MO_REVERB: Reverb is being added to the final output.

AUTHOR

Chris Ison <chrisisonwildcode@gmail.com> Bret Curtis <psi29a@gmail.com>

COPYRIGHT

This file is part of WildMIDI.

WildMIDI is free software: you can redistribute and/or modify the player under the terms of the GNU General Public License and you can redistribute and/or modify the library under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the licenses, or(at your option) any later version.

WildMIDI 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 and the GNU Lesser General Public License for more details.

You should have received a copy of the GNU General Public License and the GNU Lesser General Public License along with WildMIDI. If not, see <http://www.gnu.org/licenses/>.

This manpage is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/ or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.