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 <fluidsynth.h>
33 #define SOUNDFONT_TEXT N_("Sound fonts (required)")
34 #define SOUNDFONT_LONGTEXT N_( \
35 "A sound fonts file is required for software synthesis." )
37 static int Open (vlc_object_t *);
38 static void Close (vlc_object_t *);
41 set_description (N_("FluidSynth MIDI synthetizer"))
42 set_capability ("decoder", 100)
43 set_shortname (N_("FluidSynth"))
44 set_category (CAT_INPUT)
45 set_subcategory (SUBCAT_INPUT_ACODEC)
46 set_callbacks (Open, Close)
47 add_file ("soundfont", "", NULL,
48 SOUNDFONT_TEXT, SOUNDFONT_LONGTEXT, false);
54 fluid_settings_t *settings;
57 audio_date_t end_date;
61 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block);
64 static int Open (vlc_object_t *p_this)
66 decoder_t *p_dec = (decoder_t *)p_this;
69 if (p_dec->fmt_in.i_codec != VLC_CODEC_MIDI)
72 char *font_path = var_CreateGetNonEmptyString (p_this, "soundfont");
73 if (font_path == NULL)
75 msg_Err (p_this, "sound fonts file required for synthesis");
79 p_dec->fmt_out.i_cat = AUDIO_ES;
80 p_dec->fmt_out.audio.i_rate = 44100;
81 p_dec->fmt_out.audio.i_channels = 2;
82 p_dec->fmt_out.audio.i_original_channels =
83 p_dec->fmt_out.audio.i_physical_channels =
84 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
85 p_dec->fmt_out.i_codec = VLC_CODEC_FL32;
86 p_dec->fmt_out.audio.i_bitspersample = 32;
88 p_dec->pf_decode_audio = DecodeBlock;
89 p_sys = p_dec->p_sys = malloc (sizeof (*p_sys));
96 p_sys->settings = new_fluid_settings ();
97 p_sys->synth = new_fluid_synth (p_sys->settings);
98 /* FIXME: I bet this is not thread-safe */
99 p_sys->soundfont = fluid_synth_sfload (p_sys->synth, font_path, 1);
101 if (p_sys->soundfont == -1)
103 msg_Err (p_this, "cannot load sound fonts file");
108 aout_DateInit (&p_sys->end_date, p_dec->fmt_out.audio.i_rate);
109 aout_DateSet (&p_sys->end_date, 0);
115 static void Close (vlc_object_t *p_this)
117 decoder_sys_t *p_sys = ((decoder_t *)p_this)->p_sys;
119 if (p_sys->soundfont != -1)
120 fluid_synth_sfunload (p_sys->synth, p_sys->soundfont, 1);
121 delete_fluid_synth (p_sys->synth);
122 delete_fluid_settings (p_sys->settings);
127 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block)
130 decoder_sys_t *p_sys = p_dec->p_sys;
131 aout_buffer_t *p_out = NULL;
133 if (pp_block == NULL)
140 if (p_block->i_pts && !aout_DateGet (&p_sys->end_date))
141 aout_DateSet (&p_sys->end_date, p_block->i_pts);
143 if (p_block->i_pts < aout_DateGet (&p_sys->end_date))
145 msg_Warn (p_dec, "MIDI message in the past?");
149 if (p_block->i_buffer < 1)
152 uint8_t channel = p_block->p_buffer[0] & 0xf;
153 uint8_t p1 = (p_block->i_buffer > 1) ? (p_block->p_buffer[1] & 0x7f) : 0;
154 uint8_t p2 = (p_block->i_buffer > 2) ? (p_block->p_buffer[2] & 0x7f) : 0;
156 switch (p_block->p_buffer[0] & 0xf0)
159 fluid_synth_noteoff (p_sys->synth, channel, p1);
162 fluid_synth_noteon (p_sys->synth, channel, p1, p2);
165 fluid_synth_cc (p_sys->synth, channel, p1, p2);
168 fluid_synth_program_change (p_sys->synth, channel, p1);
171 fluid_synth_pitch_bend (p_sys->synth, channel, (p1 << 7) | p2);
176 (p_block->i_pts - aout_DateGet (&p_sys->end_date)) * 441 / 10000;
180 p_out = decoder_NewAudioBuffer (p_dec, samples);
184 p_out->start_date = aout_DateGet (&p_sys->end_date );
185 p_out->end_date = aout_DateIncrement (&p_sys->end_date, samples);
186 fluid_synth_write_float (p_sys->synth, samples,
187 p_out->p_buffer, 0, 2,
188 p_out->p_buffer, 1, 2);
190 block_Release (p_block);