allegro.cc

Manual

Audio addon

• Audio types
  • ALLEGRO_AUDIO_DEPTH
  • ALLEGRO_AUDIO_PAN_NONE
  • ALLEGRO_CHANNEL_CONF
  • ALLEGRO_MIXER
  • ALLEGRO_MIXER_QUALITY
  • ALLEGRO_PLAYMODE
  • ALLEGRO_SAMPLE_ID
  • ALLEGRO_SAMPLE
  • ALLEGRO_SAMPLE_INSTANCE
  • ALLEGRO_AUDIO_STREAM
  • ALLEGRO_VOICE
• Setting up audio
  • al_install_audio
  • al_uninstall_audio
  • al_is_audio_installed
  • al_reserve_samples
• Misc audio functions
  • al_get_allegro_audio_version
  • al_get_audio_depth_size
  • al_get_channel_count
• Voice functions
  • al_create_voice
  • al_destroy_voice
  • al_detach_voice
  • al_attach_audio_stream_to_voice
  • al_attach_mixer_to_voice
  • al_attach_sample_instance_to_voice
  • al_get_voice_frequency
  • al_get_voice_channels
  • al_get_voice_depth
  • al_get_voice_playing
  • al_set_voice_playing
  • al_get_voice_position
  • al_set_voice_position
• Sample functions
  • al_create_sample
  • al_destroy_sample
  • al_play_sample
  • al_stop_sample
  • al_stop_samples
  • al_get_sample_channels
  • al_get_sample_depth
  • al_get_sample_frequency
  • al_get_sample_length
  • al_get_sample_data
• Sample instance functions
  • al_create_sample_instance
  • al_destroy_sample_instance
  • al_play_sample_instance
  • al_stop_sample_instance
  • al_get_sample_instance_channels
  • al_get_sample_instance_depth
  • al_get_sample_instance_frequency
  • al_get_sample_instance_length
  • al_set_sample_instance_length
  • al_get_sample_instance_position
  • al_set_sample_instance_position
  • al_get_sample_instance_speed
  • al_set_sample_instance_speed
  • al_get_sample_instance_gain
  • al_set_sample_instance_gain
  • al_get_sample_instance_pan
  • al_set_sample_instance_pan
  • al_get_sample_instance_time
  • al_get_sample_instance_playmode
  • al_set_sample_instance_playmode
  • al_get_sample_instance_playing
  • al_set_sample_instance_playing
  • al_get_sample_instance_attached
  • al_detach_sample_instance
  • al_get_sample
  • al_set_sample
• Mixer functions
  • al_create_mixer
  • al_destroy_mixer
  • al_get_default_mixer
  • al_set_default_mixer
  • al_restore_default_mixer
  • al_attach_mixer_to_mixer
  • al_attach_sample_instance_to_mixer
  • al_attach_audio_stream_to_mixer
  • al_get_mixer_frequency
  • al_set_mixer_frequency
  • al_get_mixer_channels
  • al_get_mixer_depth
  • al_get_mixer_quality
  • al_set_mixer_quality
  • al_get_mixer_playing
  • al_set_mixer_playing
  • al_get_mixer_attached
  • al_detach_mixer
  • al_set_mixer_postprocess_callback
• Stream functions
  • al_create_audio_stream
  • al_destroy_audio_stream
  • al_get_audio_stream_event_source
  • al_drain_audio_stream
  • al_rewind_audio_stream
  • al_get_audio_stream_frequency
  • al_get_audio_stream_channels
  • al_get_audio_stream_depth
  • al_get_audio_stream_length
  • al_get_audio_stream_speed
  • al_set_audio_stream_speed
  • al_get_audio_stream_gain
  • al_set_audio_stream_gain
  • al_get_audio_stream_pan
  • al_set_audio_stream_pan
  • al_get_audio_stream_playing
  • al_set_audio_stream_playing
  • al_get_audio_stream_playmode
  • al_set_audio_stream_playmode
  • al_get_audio_stream_attached
  • al_detach_audio_stream
  • al_get_audio_stream_fragment
  • al_set_audio_stream_fragment
  • al_get_audio_stream_fragments
  • al_get_available_audio_stream_fragments
  • al_seek_audio_stream_secs
  • al_get_audio_stream_position_secs
  • al_get_audio_stream_length_secs
  • al_set_audio_stream_loop_secs
• Audio file I/O
  • al_register_sample_loader
  • al_register_sample_loader_f
  • al_register_sample_saver
  • al_register_sample_saver_f
  • al_register_audio_stream_loader
  • al_register_audio_stream_loader_f
  • al_load_sample
  • al_load_sample_f
  • al_load_audio_stream
  • al_load_audio_stream_f
  • al_save_sample
  • al_save_sample_f

al_get_sample_instance_speed

float al_get_sample_instance_speed(const ALLEGRO_SAMPLE_INSTANCE *spl)

Return the relative playback speed.