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>
30 #include <vlc_charset.h>
39 /* On Win32, we link statically */
41 # define FLUIDSYNTH_NOT_A_DLL
44 #include <fluidsynth.h>
46 #define SOUNDFONT_TEXT N_("Sound fonts")
47 #define SOUNDFONT_LONGTEXT N_( \
48 "A sound fonts file is required for software synthesis." )
50 #define GAIN_TEXT N_("Synthesis gain")
51 #define GAIN_LONGTEXT N_("This gain is applied to synthesis output. " \
52 "High values may cause saturation when many notes are played at a time." )
54 #define POLYPHONY_TEXT N_("Polyphony")
55 #define POLYPHONY_LONGTEXT N_( \
56 "The polyphony defines how many voices can be played at a time. " \
57 "Larger values require more processing power.")
59 #define SAMPLE_RATE_TEXT N_("Sample rate")
61 static int Open (vlc_object_t *);
62 static void Close (vlc_object_t *);
65 set_description (N_("FluidSynth MIDI synthesizer"))
66 set_capability ("decoder", 100)
67 set_shortname (N_("FluidSynth"))
68 set_category (CAT_INPUT)
69 set_subcategory (SUBCAT_INPUT_ACODEC)
70 set_callbacks (Open, Close)
71 add_loadfile ("soundfont", "",
72 SOUNDFONT_TEXT, SOUNDFONT_LONGTEXT, false)
73 add_float ("synth-gain", 0.8, GAIN_TEXT, GAIN_LONGTEXT, false)
74 change_float_range (0., 10.)
75 add_integer ("synth-polyphony", 256,
76 POLYPHONY_TEXT, POLYPHONY_LONGTEXT, false)
77 change_integer_range (1, 65535)
78 add_integer ("synth-sample-rate", 44100,
79 SAMPLE_RATE_TEXT, SAMPLE_RATE_TEXT, true)
80 change_integer_range (22050, 96000)
86 fluid_settings_t *settings;
93 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block);
96 static int Open (vlc_object_t *p_this)
98 decoder_t *p_dec = (decoder_t *)p_this;
100 if (p_dec->fmt_in.i_codec != VLC_CODEC_MIDI)
103 decoder_sys_t *p_sys = malloc (sizeof (*p_sys));
104 if (unlikely(p_sys == NULL))
107 p_sys->settings = new_fluid_settings ();
108 p_sys->synth = new_fluid_synth (p_sys->settings);
109 p_sys->soundfont = -1;
111 char *font_path = var_InheritString (p_this, "soundfont");
112 if (font_path != NULL)
114 const char *lpath = ToLocale (font_path);
116 msg_Dbg (p_this, "loading sound fonts file %s", font_path);
117 p_sys->soundfont = fluid_synth_sfload (p_sys->synth, font_path, 1);
119 if (p_sys->soundfont == -1)
120 msg_Err (p_this, "cannot load sound fonts file %s", font_path);
123 #ifdef _POSIX_VERSION
128 glob ("/usr/share/sounds/sf2/*.sf2", GLOB_NOESCAPE, NULL, &gl);
129 for (size_t i = 0; i < gl.gl_pathc; i++)
131 const char *path = gl.gl_pathv[i];
133 msg_Dbg (p_this, "loading sound fonts file %s", path);
134 p_sys->soundfont = fluid_synth_sfload (p_sys->synth, path, 1);
135 if (p_sys->soundfont != -1)
136 break; /* it worked! */
137 msg_Err (p_this, "cannot load sound fonts file %s", path);
143 if (p_sys->soundfont == -1)
145 msg_Err (p_this, "sound font file required for synthesis");
146 dialog_Fatal (p_this, _("MIDI synthesis not set up"),
147 _("A sound font file (.SF2) is required for MIDI synthesis.\n"
148 "Please install a sound font and configure it "
149 "from the VLC preferences "
150 "(Input / Codecs > Audio codecs > FluidSynth).\n"));
151 delete_fluid_synth (p_sys->synth);
152 delete_fluid_settings (p_sys->settings);
157 fluid_synth_set_gain (p_sys->synth,
158 var_InheritFloat (p_this, "synth-gain"));
159 fluid_synth_set_polyphony (p_sys->synth,
160 var_InheritInteger (p_this, "synth-polyphony"));
162 p_dec->fmt_out.i_cat = AUDIO_ES;
163 p_dec->fmt_out.audio.i_rate =
164 var_InheritInteger (p_this, "synth-sample-rate");;
165 fluid_synth_set_sample_rate (p_sys->synth, p_dec->fmt_out.audio.i_rate);
166 p_dec->fmt_out.audio.i_channels = 2;
167 p_dec->fmt_out.audio.i_original_channels =
168 p_dec->fmt_out.audio.i_physical_channels =
169 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
170 p_dec->fmt_out.i_codec = VLC_CODEC_FL32;
171 p_dec->fmt_out.audio.i_bitspersample = 32;
172 date_Init (&p_sys->end_date, p_dec->fmt_out.audio.i_rate, 1);
173 date_Set (&p_sys->end_date, 0);
175 p_dec->p_sys = p_sys;
176 p_dec->pf_decode_audio = DecodeBlock;
181 static void Close (vlc_object_t *p_this)
183 decoder_sys_t *p_sys = ((decoder_t *)p_this)->p_sys;
185 fluid_synth_sfunload (p_sys->synth, p_sys->soundfont, 1);
186 delete_fluid_synth (p_sys->synth);
187 delete_fluid_settings (p_sys->settings);
192 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block)
195 decoder_sys_t *p_sys = p_dec->p_sys;
196 aout_buffer_t *p_out = NULL;
198 if (pp_block == NULL)
205 if (p_block->i_pts > VLC_TS_INVALID && !date_Get (&p_sys->end_date))
206 date_Set (&p_sys->end_date, p_block->i_pts);
208 if (p_block->i_pts < date_Get (&p_sys->end_date))
210 msg_Warn (p_dec, "MIDI message in the past?");
214 if (p_block->i_buffer < 1)
217 uint8_t event = p_block->p_buffer[0];
218 uint8_t channel = p_block->p_buffer[0] & 0xf;
225 if (p_block->p_buffer[p_block->i_buffer - 1] != 0xF7)
228 msg_Warn (p_dec, "fragmented SysEx not implemented");
231 fluid_synth_sysex (p_sys->synth, (char *)p_block->p_buffer + 1,
232 p_block->i_buffer - 2, NULL, NULL, NULL, 0);
235 fluid_synth_system_reset (p_sys->synth);
239 uint8_t p1 = (p_block->i_buffer > 1) ? (p_block->p_buffer[1] & 0x7f) : 0;
240 uint8_t p2 = (p_block->i_buffer > 2) ? (p_block->p_buffer[2] & 0x7f) : 0;
242 switch (event & 0xF0)
245 fluid_synth_noteoff (p_sys->synth, channel, p1);
248 fluid_synth_noteon (p_sys->synth, channel, p1, p2);
250 /*case 0xA0: note aftertouch not implemented */
252 fluid_synth_cc (p_sys->synth, channel, p1, p2);
255 fluid_synth_program_change (p_sys->synth, channel, p1);
258 fluid_synth_channel_pressure (p_sys->synth, channel, p1);
261 fluid_synth_pitch_bend (p_sys->synth, channel, (p2 << 7) | p1);
266 (p_block->i_pts - date_Get (&p_sys->end_date)) * 441 / 10000;
270 p_out = decoder_NewAudioBuffer (p_dec, samples);
274 p_out->i_pts = date_Get (&p_sys->end_date );
275 p_out->i_length = date_Increment (&p_sys->end_date, samples)
277 fluid_synth_write_float (p_sys->synth, samples, p_out->p_buffer, 0, 2,
278 p_out->p_buffer, 1, 2);
280 block_Release (p_block);