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 /* On Win32, we link statically */
33 # define FLUIDSYNTH_NOT_A_DLL
36 #include <fluidsynth.h>
38 #define SOUNDFONT_TEXT N_("Sound fonts (required)")
39 #define SOUNDFONT_LONGTEXT N_( \
40 "A sound fonts file is required for software synthesis." )
42 static int Open (vlc_object_t *);
43 static void Close (vlc_object_t *);
46 set_description (N_("FluidSynth MIDI synthetizer"))
47 set_capability ("decoder", 100)
48 set_shortname (N_("FluidSynth"))
49 set_category (CAT_INPUT)
50 set_subcategory (SUBCAT_INPUT_ACODEC)
51 set_callbacks (Open, Close)
52 add_file ("soundfont", "", NULL,
53 SOUNDFONT_TEXT, SOUNDFONT_LONGTEXT, false);
59 fluid_settings_t *settings;
62 audio_date_t end_date;
66 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block);
69 static int Open (vlc_object_t *p_this)
71 decoder_t *p_dec = (decoder_t *)p_this;
74 if (p_dec->fmt_in.i_codec != VLC_CODEC_MIDI)
77 char *font_path = var_CreateGetNonEmptyString (p_this, "soundfont");
78 if (font_path == NULL)
80 msg_Err (p_this, "sound fonts file required for synthesis");
84 p_dec->fmt_out.i_cat = AUDIO_ES;
85 p_dec->fmt_out.audio.i_rate = 44100;
86 p_dec->fmt_out.audio.i_channels = 2;
87 p_dec->fmt_out.audio.i_original_channels =
88 p_dec->fmt_out.audio.i_physical_channels =
89 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
90 p_dec->fmt_out.i_codec = VLC_CODEC_FL32;
91 p_dec->fmt_out.audio.i_bitspersample = 32;
93 p_dec->pf_decode_audio = DecodeBlock;
94 p_sys = p_dec->p_sys = malloc (sizeof (*p_sys));
101 p_sys->settings = new_fluid_settings ();
102 p_sys->synth = new_fluid_synth (p_sys->settings);
103 /* FIXME: I bet this is not thread-safe */
104 p_sys->soundfont = fluid_synth_sfload (p_sys->synth, font_path, 1);
106 if (p_sys->soundfont == -1)
108 msg_Err (p_this, "cannot load sound fonts file");
113 aout_DateInit (&p_sys->end_date, p_dec->fmt_out.audio.i_rate);
114 aout_DateSet (&p_sys->end_date, 0);
120 static void Close (vlc_object_t *p_this)
122 decoder_sys_t *p_sys = ((decoder_t *)p_this)->p_sys;
124 if (p_sys->soundfont != -1)
125 fluid_synth_sfunload (p_sys->synth, p_sys->soundfont, 1);
126 delete_fluid_synth (p_sys->synth);
127 delete_fluid_settings (p_sys->settings);
132 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block)
135 decoder_sys_t *p_sys = p_dec->p_sys;
136 aout_buffer_t *p_out = NULL;
138 if (pp_block == NULL)
145 if (p_block->i_pts && !aout_DateGet (&p_sys->end_date))
146 aout_DateSet (&p_sys->end_date, p_block->i_pts);
148 if (p_block->i_pts < aout_DateGet (&p_sys->end_date))
150 msg_Warn (p_dec, "MIDI message in the past?");
154 if (p_block->i_buffer < 1)
157 uint8_t channel = p_block->p_buffer[0] & 0xf;
158 uint8_t p1 = (p_block->i_buffer > 1) ? (p_block->p_buffer[1] & 0x7f) : 0;
159 uint8_t p2 = (p_block->i_buffer > 2) ? (p_block->p_buffer[2] & 0x7f) : 0;
161 switch (p_block->p_buffer[0] & 0xf0)
164 fluid_synth_noteoff (p_sys->synth, channel, p1);
167 fluid_synth_noteon (p_sys->synth, channel, p1, p2);
170 fluid_synth_cc (p_sys->synth, channel, p1, p2);
173 fluid_synth_program_change (p_sys->synth, channel, p1);
176 fluid_synth_pitch_bend (p_sys->synth, channel, (p1 << 7) | p2);
181 (p_block->i_pts - aout_DateGet (&p_sys->end_date)) * 441 / 10000;
185 p_out = decoder_NewAudioBuffer (p_dec, samples);
189 p_out->start_date = aout_DateGet (&p_sys->end_date );
190 p_out->end_date = aout_DateIncrement (&p_sys->end_date, samples);
191 fluid_synth_write_float (p_sys->synth, samples,
192 p_out->p_buffer, 0, 2,
193 p_out->p_buffer, 1, 2);
195 block_Release (p_block);