1 /*****************************************************************************
2 * fluidsynth.c: Software MIDI synthetizer 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>
29 #include <vlc_codec.h>
31 #include <vlc_dialog.h>
33 /* On Win32, we link statically */
35 # define FLUIDSYNTH_NOT_A_DLL
38 #include <fluidsynth.h>
40 #define SOUNDFONT_TEXT N_("Sound fonts (required)")
41 #define SOUNDFONT_LONGTEXT N_( \
42 "A sound fonts file is required for software synthesis." )
44 static int Open (vlc_object_t *);
45 static void Close (vlc_object_t *);
48 set_description (N_("FluidSynth MIDI synthetizer"))
49 set_capability ("decoder", 100)
50 set_shortname (N_("FluidSynth"))
51 set_category (CAT_INPUT)
52 set_subcategory (SUBCAT_INPUT_ACODEC)
53 set_callbacks (Open, Close)
54 add_file ("soundfont", "", NULL,
55 SOUNDFONT_TEXT, SOUNDFONT_LONGTEXT, false);
61 fluid_settings_t *settings;
69 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block);
72 static int Open (vlc_object_t *p_this)
74 decoder_t *p_dec = (decoder_t *)p_this;
77 if (p_dec->fmt_in.i_codec != VLC_CODEC_MIDI)
80 char *font_path = var_InheritString (p_this, "soundfont");
81 if (font_path == NULL)
83 msg_Err (p_this, "sound font file required for synthesis");
84 dialog_Fatal (p_this, _("MIDI synthesis not set up"),
85 _("A sound font file (.SF2) is required for MIDI synthesis.\n"
86 "Please install a sound font and configure it "
87 "from the VLC preferences (Codecs / Audio / FluidSynth).\n"));
91 p_dec->pf_decode_audio = DecodeBlock;
92 p_sys = p_dec->p_sys = malloc (sizeof (*p_sys));
99 p_sys->settings = new_fluid_settings ();
100 p_sys->synth = new_fluid_synth (p_sys->settings);
101 /* FIXME: I bet this is not thread-safe */
102 p_sys->soundfont = fluid_synth_sfload (p_sys->synth, font_path, 1);
103 if (p_sys->soundfont == -1)
105 msg_Err (p_this, "cannot load sound fonts file %s", font_path);
107 dialog_Fatal (p_this, _("MIDI synthesis not set up"),
108 _("The specified sound font file (%s) is incorrect.\n"
109 "Please install a valid sound font and reconfigure it "
110 "from the VLC preferences (Codecs / Audio / FluidSynth).\n"),
117 p_dec->fmt_out.i_cat = AUDIO_ES;
118 p_dec->fmt_out.audio.i_rate = 44100;
119 p_dec->fmt_out.audio.i_channels = 2;
120 p_dec->fmt_out.audio.i_original_channels =
121 p_dec->fmt_out.audio.i_physical_channels =
122 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
125 p_dec->fmt_out.i_codec = VLC_CODEC_FL32;
126 p_dec->fmt_out.audio.i_bitspersample = 32;
127 p_sys->fixed = false;
131 p_dec->fmt_out.i_codec = VLC_CODEC_S16N;
132 p_dec->fmt_out.audio.i_bitspersample = 16;
135 date_Init (&p_sys->end_date, p_dec->fmt_out.audio.i_rate, 1);
136 date_Set (&p_sys->end_date, 0);
142 static void Close (vlc_object_t *p_this)
144 decoder_sys_t *p_sys = ((decoder_t *)p_this)->p_sys;
146 if (p_sys->soundfont != -1)
147 fluid_synth_sfunload (p_sys->synth, p_sys->soundfont, 1);
148 delete_fluid_synth (p_sys->synth);
149 delete_fluid_settings (p_sys->settings);
154 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block)
157 decoder_sys_t *p_sys = p_dec->p_sys;
158 aout_buffer_t *p_out = NULL;
160 if (pp_block == NULL)
167 if (p_block->i_pts > VLC_TS_INVALID && !date_Get (&p_sys->end_date))
168 date_Set (&p_sys->end_date, p_block->i_pts);
170 if (p_block->i_pts < date_Get (&p_sys->end_date))
172 msg_Warn (p_dec, "MIDI message in the past?");
176 if (p_block->i_buffer < 1)
179 uint8_t channel = p_block->p_buffer[0] & 0xf;
180 uint8_t p1 = (p_block->i_buffer > 1) ? (p_block->p_buffer[1] & 0x7f) : 0;
181 uint8_t p2 = (p_block->i_buffer > 2) ? (p_block->p_buffer[2] & 0x7f) : 0;
183 switch (p_block->p_buffer[0] & 0xf0)
186 fluid_synth_noteoff (p_sys->synth, channel, p1);
189 fluid_synth_noteon (p_sys->synth, channel, p1, p2);
192 fluid_synth_cc (p_sys->synth, channel, p1, p2);
195 fluid_synth_program_change (p_sys->synth, channel, p1);
198 fluid_synth_pitch_bend (p_sys->synth, channel, (p1 << 7) | p2);
203 (p_block->i_pts - date_Get (&p_sys->end_date)) * 441 / 10000;
207 p_out = decoder_NewAudioBuffer (p_dec, samples);
211 p_out->i_pts = date_Get (&p_sys->end_date );
212 p_out->i_length = date_Increment (&p_sys->end_date, samples)
215 fluid_synth_write_float (p_sys->synth, samples,
216 p_out->p_buffer, 0, 2,
217 p_out->p_buffer, 1, 2);
219 fluid_synth_write_s16 (p_sys->synth, samples,
220 (int16_t *)p_out->p_buffer, 0, 2,
221 (int16_t *)p_out->p_buffer, 1, 2);
223 block_Release (p_block);