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 SAMPLE_RATE_TEXT N_("Sample rate")
56 static int Open (vlc_object_t *);
57 static void Close (vlc_object_t *);
60 set_description (N_("FluidSynth MIDI synthesizer"))
61 set_capability ("decoder", 100)
62 set_shortname (N_("FluidSynth"))
63 set_category (CAT_INPUT)
64 set_subcategory (SUBCAT_INPUT_ACODEC)
65 set_callbacks (Open, Close)
66 add_loadfile ("soundfont", "",
67 SOUNDFONT_TEXT, SOUNDFONT_LONGTEXT, false)
68 add_float ("synth-gain", 0.8, GAIN_TEXT, GAIN_LONGTEXT, false)
69 change_float_range (0., 10.)
70 add_integer ("synth-sample-rate", 44100,
71 SAMPLE_RATE_TEXT, SAMPLE_RATE_TEXT, true)
72 change_integer_range (22050, 96000)
78 fluid_settings_t *settings;
85 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block);
88 static int Open (vlc_object_t *p_this)
90 decoder_t *p_dec = (decoder_t *)p_this;
92 if (p_dec->fmt_in.i_codec != VLC_CODEC_MIDI)
95 decoder_sys_t *p_sys = malloc (sizeof (*p_sys));
96 if (unlikely(p_sys == NULL))
99 p_sys->settings = new_fluid_settings ();
100 p_sys->synth = new_fluid_synth (p_sys->settings);
101 p_sys->soundfont = -1;
103 char *font_path = var_InheritString (p_this, "soundfont");
104 if (font_path != NULL)
106 const char *lpath = ToLocale (font_path);
108 msg_Dbg (p_this, "loading sound fonts file %s", font_path);
109 p_sys->soundfont = fluid_synth_sfload (p_sys->synth, font_path, 1);
111 if (p_sys->soundfont == -1)
112 msg_Err (p_this, "cannot load sound fonts file %s", font_path);
115 #ifdef _POSIX_VERSION
120 glob ("/usr/share/sounds/sf2/*.sf2", GLOB_NOESCAPE, NULL, &gl);
121 for (size_t i = 0; i < gl.gl_pathc; i++)
123 const char *path = gl.gl_pathv[i];
125 msg_Dbg (p_this, "loading sound fonts file %s", path);
126 p_sys->soundfont = fluid_synth_sfload (p_sys->synth, path, 1);
127 if (p_sys->soundfont != -1)
128 break; /* it worked! */
129 msg_Err (p_this, "cannot load sound fonts file %s", path);
135 if (p_sys->soundfont == -1)
137 msg_Err (p_this, "sound font file required for synthesis");
138 dialog_Fatal (p_this, _("MIDI synthesis not set up"),
139 _("A sound font file (.SF2) is required for MIDI synthesis.\n"
140 "Please install a sound font and configure it "
141 "from the VLC preferences "
142 "(Input / Codecs > Audio codecs > FluidSynth).\n"));
143 delete_fluid_synth (p_sys->synth);
144 delete_fluid_settings (p_sys->settings);
149 fluid_synth_set_gain (p_sys->synth,
150 var_InheritFloat (p_this, "synth-gain"));
152 p_dec->fmt_out.i_cat = AUDIO_ES;
153 p_dec->fmt_out.audio.i_rate =
154 var_InheritInteger (p_this, "synth-sample-rate");;
155 fluid_synth_set_sample_rate (p_sys->synth, p_dec->fmt_out.audio.i_rate);
156 p_dec->fmt_out.audio.i_channels = 2;
157 p_dec->fmt_out.audio.i_original_channels =
158 p_dec->fmt_out.audio.i_physical_channels =
159 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
160 p_dec->fmt_out.i_codec = VLC_CODEC_FL32;
161 p_dec->fmt_out.audio.i_bitspersample = 32;
162 date_Init (&p_sys->end_date, p_dec->fmt_out.audio.i_rate, 1);
163 date_Set (&p_sys->end_date, 0);
165 p_dec->p_sys = p_sys;
166 p_dec->pf_decode_audio = DecodeBlock;
171 static void Close (vlc_object_t *p_this)
173 decoder_sys_t *p_sys = ((decoder_t *)p_this)->p_sys;
175 fluid_synth_sfunload (p_sys->synth, p_sys->soundfont, 1);
176 delete_fluid_synth (p_sys->synth);
177 delete_fluid_settings (p_sys->settings);
182 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block)
185 decoder_sys_t *p_sys = p_dec->p_sys;
186 aout_buffer_t *p_out = NULL;
188 if (pp_block == NULL)
195 if (p_block->i_pts > VLC_TS_INVALID && !date_Get (&p_sys->end_date))
196 date_Set (&p_sys->end_date, p_block->i_pts);
198 if (p_block->i_pts < date_Get (&p_sys->end_date))
200 msg_Warn (p_dec, "MIDI message in the past?");
204 if (p_block->i_buffer < 1)
207 uint8_t event = p_block->p_buffer[0];
208 uint8_t channel = p_block->p_buffer[0] & 0xf;
215 if (p_block->p_buffer[p_block->i_buffer - 1] != 0xF7)
218 msg_Warn (p_dec, "fragmented SysEx not implemented");
221 fluid_synth_sysex (p_sys->synth, (char *)p_block->p_buffer + 1,
222 p_block->i_buffer - 2, NULL, NULL, NULL, 0);
225 fluid_synth_system_reset (p_sys->synth);
229 uint8_t p1 = (p_block->i_buffer > 1) ? (p_block->p_buffer[1] & 0x7f) : 0;
230 uint8_t p2 = (p_block->i_buffer > 2) ? (p_block->p_buffer[2] & 0x7f) : 0;
232 switch (event & 0xF0)
235 fluid_synth_noteoff (p_sys->synth, channel, p1);
238 fluid_synth_noteon (p_sys->synth, channel, p1, p2);
240 /*case 0xA0: note aftertouch not implemented */
242 fluid_synth_cc (p_sys->synth, channel, p1, p2);
245 fluid_synth_program_change (p_sys->synth, channel, p1);
248 fluid_synth_channel_pressure (p_sys->synth, channel, p1);
251 fluid_synth_pitch_bend (p_sys->synth, channel, (p2 << 7) | p1);
256 (p_block->i_pts - date_Get (&p_sys->end_date)) * 441 / 10000;
260 p_out = decoder_NewAudioBuffer (p_dec, samples);
264 p_out->i_pts = date_Get (&p_sys->end_date );
265 p_out->i_length = date_Increment (&p_sys->end_date, samples)
267 fluid_synth_write_float (p_sys->synth, samples, p_out->p_buffer, 0, 2,
268 p_out->p_buffer, 1, 2);
270 block_Release (p_block);