1 /*****************************************************************************
2 * fluidsynth.c: Software MIDI synthesizer using libfluidsynth
3 *****************************************************************************
4 * Copyright © 2007 Rémi Denis-Courmont
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
20 *****************************************************************************/
26 #include <vlc_common.h>
27 #include <vlc_plugin.h>
28 #include <vlc_codec.h>
29 #include <vlc_dialog.h>
38 /* On Win32, we link statically */
40 # define FLUIDSYNTH_NOT_A_DLL
43 #include <fluidsynth.h>
45 #define SOUNDFONT_TEXT N_("Sound fonts")
46 #define SOUNDFONT_LONGTEXT N_( \
47 "A sound fonts file is required for software synthesis." )
49 #define CHORUS_TEXT N_("Chorus")
51 #define GAIN_TEXT N_("Synthesis gain")
52 #define GAIN_LONGTEXT N_("This gain is applied to synthesis output. " \
53 "High values may cause saturation when many notes are played at a time." )
55 #define POLYPHONY_TEXT N_("Polyphony")
56 #define POLYPHONY_LONGTEXT N_( \
57 "The polyphony defines how many voices can be played at a time. " \
58 "Larger values require more processing power.")
60 #define REVERB_TEXT N_("Reverb")
62 #define SAMPLE_RATE_TEXT N_("Sample rate")
64 static int Open (vlc_object_t *);
65 static void Close (vlc_object_t *);
68 set_description (N_("FluidSynth MIDI synthesizer"))
69 set_capability ("decoder", 100)
70 set_shortname (N_("FluidSynth"))
71 set_category (CAT_INPUT)
72 set_subcategory (SUBCAT_INPUT_ACODEC)
73 set_callbacks (Open, Close)
74 add_loadfile ("soundfont", "",
75 SOUNDFONT_TEXT, SOUNDFONT_LONGTEXT, false)
76 add_bool ("synth-chorus", true, CHORUS_TEXT, CHORUS_TEXT, false)
77 add_float ("synth-gain", .5, GAIN_TEXT, GAIN_LONGTEXT, false)
78 change_float_range (0., 10.)
79 add_integer ("synth-polyphony", 256,
80 POLYPHONY_TEXT, POLYPHONY_LONGTEXT, false)
81 change_integer_range (1, 65535)
82 add_bool ("synth-reverb", true, REVERB_TEXT, REVERB_TEXT, true)
83 add_integer ("synth-sample-rate", 44100,
84 SAMPLE_RATE_TEXT, SAMPLE_RATE_TEXT, true)
85 change_integer_range (22050, 96000)
91 fluid_settings_t *settings;
98 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block);
101 static int Open (vlc_object_t *p_this)
103 decoder_t *p_dec = (decoder_t *)p_this;
105 if (p_dec->fmt_in.i_codec != VLC_CODEC_MIDI)
108 decoder_sys_t *p_sys = malloc (sizeof (*p_sys));
109 if (unlikely(p_sys == NULL))
112 p_sys->settings = new_fluid_settings ();
113 p_sys->synth = new_fluid_synth (p_sys->settings);
114 p_sys->soundfont = -1;
116 char *font_path = var_InheritString (p_this, "soundfont");
117 if (font_path != NULL)
119 msg_Dbg (p_this, "loading sound fonts file %s", font_path);
120 p_sys->soundfont = fluid_synth_sfload (p_sys->synth, font_path, 1);
121 if (p_sys->soundfont == -1)
122 msg_Err (p_this, "cannot load sound fonts file %s", font_path);
125 #ifdef _POSIX_VERSION
130 glob ("/usr/share/sounds/sf2/*.sf2", GLOB_NOESCAPE, NULL, &gl);
131 for (size_t i = 0; i < gl.gl_pathc; i++)
133 const char *path = gl.gl_pathv[i];
135 msg_Dbg (p_this, "loading sound fonts file %s", path);
136 p_sys->soundfont = fluid_synth_sfload (p_sys->synth, path, 1);
137 if (p_sys->soundfont != -1)
138 break; /* it worked! */
139 msg_Err (p_this, "cannot load sound fonts file %s", path);
145 if (p_sys->soundfont == -1)
147 msg_Err (p_this, "sound font file required for synthesis");
148 dialog_Fatal (p_this, _("MIDI synthesis not set up"),
149 _("A sound font file (.SF2) is required for MIDI synthesis.\n"
150 "Please install a sound font and configure it "
151 "from the VLC preferences "
152 "(Input / Codecs > Audio codecs > FluidSynth).\n"));
153 delete_fluid_synth (p_sys->synth);
154 delete_fluid_settings (p_sys->settings);
159 fluid_synth_set_chorus_on (p_sys->synth,
160 var_InheritBool (p_this, "synth-chorus"));
161 fluid_synth_set_gain (p_sys->synth,
162 var_InheritFloat (p_this, "synth-gain"));
163 fluid_synth_set_polyphony (p_sys->synth,
164 var_InheritInteger (p_this, "synth-polyphony"));
165 fluid_synth_set_reverb_on (p_sys->synth,
166 var_InheritBool (p_this, "synth-reverb"));
168 p_dec->fmt_out.i_cat = AUDIO_ES;
169 p_dec->fmt_out.audio.i_rate =
170 var_InheritInteger (p_this, "synth-sample-rate");;
171 fluid_synth_set_sample_rate (p_sys->synth, p_dec->fmt_out.audio.i_rate);
172 p_dec->fmt_out.audio.i_channels = 2;
173 p_dec->fmt_out.audio.i_original_channels =
174 p_dec->fmt_out.audio.i_physical_channels =
175 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
176 p_dec->fmt_out.i_codec = VLC_CODEC_FL32;
177 p_dec->fmt_out.audio.i_bitspersample = 32;
178 date_Init (&p_sys->end_date, p_dec->fmt_out.audio.i_rate, 1);
179 date_Set (&p_sys->end_date, 0);
181 p_dec->p_sys = p_sys;
182 p_dec->pf_decode_audio = DecodeBlock;
187 static void Close (vlc_object_t *p_this)
189 decoder_sys_t *p_sys = ((decoder_t *)p_this)->p_sys;
191 fluid_synth_sfunload (p_sys->synth, p_sys->soundfont, 1);
192 delete_fluid_synth (p_sys->synth);
193 delete_fluid_settings (p_sys->settings);
198 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block)
201 decoder_sys_t *p_sys = p_dec->p_sys;
202 aout_buffer_t *p_out = NULL;
204 if (pp_block == NULL)
211 if (p_block->i_pts > VLC_TS_INVALID && !date_Get (&p_sys->end_date))
212 date_Set (&p_sys->end_date, p_block->i_pts);
214 if (p_block->i_pts < date_Get (&p_sys->end_date))
216 msg_Warn (p_dec, "MIDI message in the past?");
220 if (p_block->i_buffer < 1)
223 uint8_t event = p_block->p_buffer[0];
224 uint8_t channel = p_block->p_buffer[0] & 0xf;
231 if (p_block->p_buffer[p_block->i_buffer - 1] != 0xF7)
234 msg_Warn (p_dec, "fragmented SysEx not implemented");
237 fluid_synth_sysex (p_sys->synth, (char *)p_block->p_buffer + 1,
238 p_block->i_buffer - 2, NULL, NULL, NULL, 0);
241 fluid_synth_system_reset (p_sys->synth);
245 uint8_t p1 = (p_block->i_buffer > 1) ? (p_block->p_buffer[1] & 0x7f) : 0;
246 uint8_t p2 = (p_block->i_buffer > 2) ? (p_block->p_buffer[2] & 0x7f) : 0;
248 switch (event & 0xF0)
251 fluid_synth_noteoff (p_sys->synth, channel, p1);
254 fluid_synth_noteon (p_sys->synth, channel, p1, p2);
256 /*case 0xA0: note aftertouch not implemented */
258 fluid_synth_cc (p_sys->synth, channel, p1, p2);
261 fluid_synth_program_change (p_sys->synth, channel, p1);
264 fluid_synth_channel_pressure (p_sys->synth, channel, p1);
267 fluid_synth_pitch_bend (p_sys->synth, channel, (p2 << 7) | p1);
272 (p_block->i_pts - date_Get (&p_sys->end_date)) * 441 / 10000;
276 p_out = decoder_NewAudioBuffer (p_dec, samples);
280 p_out->i_pts = date_Get (&p_sys->end_date );
281 p_out->i_length = date_Increment (&p_sys->end_date, samples)
283 fluid_synth_write_float (p_sys->synth, samples, p_out->p_buffer, 0, 2,
284 p_out->p_buffer, 1, 2);
286 block_Release (p_block);