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 *****************************************************************************/
24 #include <vlc_codec.h>
26 #include <fluidsynth.h>
28 #define SOUNDFONT_TEXT N_("Sound fonts (required)")
29 #define SOUNDFONT_LONGTEXT N_( \
30 "A sound fonts file is required for software synthesis." )
32 static int Open (vlc_object_t *);
33 static void Close (vlc_object_t *);
36 set_description (_("FluidSynth MIDI synthetizer"));
37 set_capability ("decoder", 100);
38 set_category (CAT_INPUT);
39 set_subcategory (SUBCAT_INPUT_ACODEC);
40 set_callbacks (Open, Close);
41 add_file ("soundfont", "", NULL,
42 SOUNDFONT_TEXT, SOUNDFONT_LONGTEXT, VLC_FALSE);
48 fluid_settings_t *settings;
51 audio_date_t end_date;
55 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block);
58 static int Open (vlc_object_t *p_this)
60 decoder_t *p_dec = (decoder_t *)p_this;
63 if (p_dec->fmt_in.i_codec != VLC_FOURCC ('M', 'I', 'D', 'I'))
66 char *font_path = var_CreateGetNonEmptyString (p_this, "soundfont");
67 if (font_path == NULL)
69 msg_Err (p_this, "sound fonts file required for synthesis");
73 p_dec->fmt_out.i_cat = AUDIO_ES;
74 p_dec->fmt_out.audio.i_rate = 44100;
75 p_dec->fmt_out.audio.i_channels = 2;
76 p_dec->fmt_out.audio.i_original_channels =
77 p_dec->fmt_out.audio.i_physical_channels =
78 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
79 p_dec->fmt_out.i_codec = AOUT_FMT_S16_NE;
80 p_dec->fmt_out.audio.i_bitspersample = 16;
82 p_dec->pf_decode_audio = DecodeBlock;
83 p_sys = p_dec->p_sys = malloc (sizeof (*p_sys));
90 p_sys->settings = new_fluid_settings ();
91 p_sys->synth = new_fluid_synth (p_sys->settings);
92 /* FIXME: I bet this is not thread-safe */
93 p_sys->soundfont = fluid_synth_sfload (p_sys->synth, font_path, 1);
95 if (p_sys->soundfont == -1)
97 msg_Err (p_this, "cannot load sound fonts file");
102 aout_DateInit (&p_sys->end_date, p_dec->fmt_out.audio.i_rate);
103 aout_DateSet (&p_sys->end_date, 0);
109 static void Close (vlc_object_t *p_this)
111 decoder_sys_t *p_sys = ((decoder_t *)p_this)->p_sys;
113 if (p_sys->soundfont != -1)
114 fluid_synth_sfunload (p_sys->synth, p_sys->soundfont, 1);
115 delete_fluid_synth (p_sys->synth);
116 delete_fluid_settings (p_sys->settings);
121 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block)
124 decoder_sys_t *p_sys = p_dec->p_sys;
126 if (pp_block == NULL)
132 if (p_block->i_pts && !aout_DateGet (&p_sys->end_date))
133 aout_DateSet (&p_sys->end_date, p_block->i_pts);
135 if (p_block->i_pts < aout_DateGet (&p_sys->end_date))
137 msg_Warn (p_dec, "MIDI message in the past?");
138 block_Release (p_block);
142 if (p_block->i_buffer < 1)
145 uint8_t channel = p_block->p_buffer[0] & 0xf;
146 uint8_t p1 = (p_block->i_buffer > 1) ? (p_block->p_buffer[1] & 0x7f) : 0;
147 uint8_t p2 = (p_block->i_buffer > 2) ? (p_block->p_buffer[2] & 0x7f) : 0;
149 switch (p_block->p_buffer[0] & 0xf0)
152 fluid_synth_noteoff (p_sys->synth, channel, p1);
155 fluid_synth_noteon (p_sys->synth, channel, p1, p2);
158 fluid_synth_cc (p_sys->synth, channel, p1, p2);
161 fluid_synth_program_change (p_sys->synth, channel, p1);
164 fluid_synth_pitch_bend (p_sys->synth, channel, (p1 << 7) | p2);
167 p_block->p_buffer += p_block->i_buffer;
168 p_block->i_buffer = 0;
171 (p_block->i_pts - aout_DateGet (&p_sys->end_date)) * 441 / 10000;
175 aout_buffer_t *p_out = p_dec->pf_aout_buffer_new (p_dec, samples);
178 block_Release (p_block);
182 p_out->start_date = aout_DateGet (&p_sys->end_date );
183 p_out->end_date = aout_DateIncrement (&p_sys->end_date, samples);
184 fluid_synth_write_s16 (p_sys->synth, samples,
185 (int16_t *)p_out->p_buffer, 0, 2,
186 (int16_t *)p_out->p_buffer, 1, 2);