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);
49 fluid_settings_t *settings;
52 audio_date_t end_date;
56 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block);
59 static int Open (vlc_object_t *p_this)
61 decoder_t *p_dec = (decoder_t *)p_this;
64 if (p_dec->fmt_in.i_codec != VLC_FOURCC ('M', 'I', 'D', 'I'))
67 char *font_path = var_CreateGetNonEmptyString (p_this, "soundfont");
68 if (font_path == NULL)
70 msg_Err (p_this, "sound fonts file required for synthesis");
74 p_dec->fmt_out.i_cat = AUDIO_ES;
75 p_dec->fmt_out.audio.i_rate = 44100;
76 p_dec->fmt_out.audio.i_channels = 2;
77 p_dec->fmt_out.audio.i_original_channels =
78 p_dec->fmt_out.audio.i_physical_channels =
79 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
80 p_dec->fmt_out.i_codec = AOUT_FMT_S16_NE;
81 p_dec->fmt_out.audio.i_bitspersample = 16;
83 p_dec->pf_decode_audio = DecodeBlock;
84 p_sys = p_dec->p_sys = malloc (sizeof (*p_sys));
91 p_sys->settings = new_fluid_settings ();
92 p_sys->synth = new_fluid_synth (p_sys->settings);
93 /* FIXME: I bet this is not thread-safe */
94 p_sys->soundfont = fluid_synth_sfload (p_sys->synth, font_path, 1);
96 if (p_sys->soundfont == -1)
98 msg_Err (p_this, "cannot load sound fonts file");
103 aout_DateInit (&p_sys->end_date, p_dec->fmt_out.audio.i_rate);
104 aout_DateSet (&p_sys->end_date, 0);
110 static void Close (vlc_object_t *p_this)
112 decoder_sys_t *p_sys = ((decoder_t *)p_this)->p_sys;
114 if (p_sys->soundfont != -1)
115 fluid_synth_sfunload (p_sys->synth, p_sys->soundfont, 1);
116 delete_fluid_synth (p_sys->synth);
117 delete_fluid_settings (p_sys->settings);
122 static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block)
125 decoder_sys_t *p_sys = p_dec->p_sys;
127 if (pp_block == NULL)
133 if (p_block->i_pts && !aout_DateGet (&p_sys->end_date))
134 aout_DateSet (&p_sys->end_date, p_block->i_pts);
136 if (p_block->i_pts < aout_DateGet (&p_sys->end_date))
138 msg_Warn (p_dec, "MIDI message in the past?");
139 block_Release (p_block);
143 if (p_block->i_buffer < 1)
146 uint8_t channel = p_block->p_buffer[0] & 0xf;
147 uint8_t p1 = (p_block->i_buffer > 1) ? (p_block->p_buffer[1] & 0x7f) : 0;
148 uint8_t p2 = (p_block->i_buffer > 2) ? (p_block->p_buffer[2] & 0x7f) : 0;
150 switch (p_block->p_buffer[0] & 0xf0)
153 fluid_synth_noteoff (p_sys->synth, channel, p1);
156 fluid_synth_noteon (p_sys->synth, channel, p1, p2);
159 fluid_synth_cc (p_sys->synth, channel, p1, p2);
162 fluid_synth_program_change (p_sys->synth, channel, p1);
165 fluid_synth_pitch_bend (p_sys->synth, channel, (p1 << 7) | p2);
168 p_block->p_buffer += p_block->i_buffer;
169 p_block->i_buffer = 0;
172 (p_block->i_pts - aout_DateGet (&p_sys->end_date)) * 441 / 10000;
176 aout_buffer_t *p_out = p_dec->pf_aout_buffer_new (p_dec, samples);
179 block_Release (p_block);
183 p_out->start_date = aout_DateGet (&p_sys->end_date );
184 p_out->end_date = aout_DateIncrement (&p_sys->end_date, samples);
185 fluid_synth_write_s16 (p_sys->synth, samples,
186 (int16_t *)p_out->p_buffer, 0, 2,
187 (int16_t *)p_out->p_buffer, 1, 2);