zdoom/fluidsynth
0
0
Fork 0
mirror of https://github.com/ZDoom/fluidsynth.git synced 2024-11-10 06:51:54 +00:00
Code Issues Projects Releases Packages Wiki Activity

update API doc about fast file renderer

Browse source
This commit is contained in:
derselbst 2018-04-04 18:45:24 +02:00
parent 9196636177
commit 3e999c8a3d
1 changed files with 55 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

56
doc/fluidsynth-v11-devdoc.txt
View file

@ -40,6 +40,7 @@ All the source code examples in this document are in the public domain; you can
- \ref SendingMIDI
- \ref RealtimeMIDI
- \ref MIDIPlayer
- \ref FileRenderer
- \ref MIDIPlayerMem
- \ref MIDIRouter
- \ref Sequencer
@ -541,6 +542,60 @@ A list of available <strong>MIDI player settings</strong> can be found in <a hre
\section FileRenderer Fast file renderer for non-realtime MIDI file rendering
Instead of creating an audio driver as described in section \ref MIDIPlayer one may chose to use the file renderer, which is the fastest way to synthesize MIDI files.
\code
fluid_settings_t* settings;
fluid_synth_t* synth;
fluid_player_t* player;
fluid_file_renderer_t* renderer;
settings = new_fluid_settings();
// specify the file to store the audio to
// make sure you compiled fluidsynth with libsndfile to get a real wave file
// otherwise this file will only contain raw s16 stereo PCM
fluid_settings_setstr(settings, "audio.file.name", "/path/to/output.wav");
// use number of samples processed as timing source, rather than the system timer
fluid_settings_setstr(settings, "player.timing-source", "sample");
// since this is a non-realtime szenario, there is no need to pin the sample data
fluid_settings_setint(settings, "synth.lock-memory", 0);
synth = new_fluid_synth(settings);
// *** loading of a soundfont omitted ***
player = new_fluid_player(synth);
fluid_player_add(player, "/path/to/midifile.mid");
fluid_player_play(player);
renderer = new_fluid_file_renderer (synth);
while (fluid_player_get_status(player) == FLUID_PLAYER_PLAYING)
{
if (fluid_file_renderer_process_block(renderer) != FLUID_OK)
{
break;
}
}
// just for sure: stop the playback explicitly and wait until finished
fluid_player_stop(player);
fluid_player_join(player);
delete_fluid_file_renderer(renderer);
delete_fluid_player(player);
delete_fluid_synth(synth);
delete_fluid_settings(settings);
\endcode
Various output files types are supported, if compiled with libsndfile. Those can be specified via the \c settings object as well. Refer to the <a href="fluidsettings.xml#audio.file.endian" target="_blank"><b>FluidSettings Documentation</b></a> for more \c audio.file\.\* options.
\section MIDIPlayerMem Playing a MIDI file from memory
FluidSynth can be also play MIDI files directly from a buffer in memory. If you need to play a file from a stream (such as stdin, a network, or a high-level file interface), you can load the entire file into a buffer first, and then use this approach. Use the same technique as above, but rather than calling fluid_player_add(), load it into memory and call fluid_player_add_mem() instead. Once you have passed a buffer to fluid_player_add_mem(), it is copied, so you may use it again or free it immediately (it is your responsibility to free it if you allocated it).
@ -797,7 +852,6 @@ The shell interface allows you to send simple textual commands to the synthesize
- LADSPA effects unit
- Multi-channel audio
- MIDI tunings
- Fast file renderer for rendering audio to file in non-realtime
*/
/*!