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/*****************************************************************************
* fluidsynth.c: Software MIDI synthetizer using libfluidsynth
*****************************************************************************
* Copyright © 2007 Rémi Denis-Courmont
* $Id: 4cf309870a12d496fdf000dd7df4d00e6d9a8038 $
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_aout.h>
#include <vlc_codec.h>
#include <vlc_cpu.h>
#include <vlc_dialog.h>
#include <vlc_charset.h>
/* On Win32, we link statically */
#ifdef WIN32
# define FLUIDSYNTH_NOT_A_DLL
#endif
#include <fluidsynth.h>
#if (FLUIDSYNTH_VERSION_MAJOR < 1) \
|| (FLUIDSYNTH_VERSION_MAJOR == 1 && FLUIDSYNTH_VERSION_MINOR < 1)
# define FLUID_FAILED (-1)
# define fluid_synth_sysex(synth, ptr, len, d, e, f, g) (FLUID_FAILED)
# define fluid_synth_system_reset(synth) (FLUID_FAILED)
# define fluid_synth_channel_pressure(synth, channel, p) (FLUID_FAILED)
#endif
#define SOUNDFONT_TEXT N_("Sound fonts (required)")
#define SOUNDFONT_LONGTEXT N_( \
"A sound fonts file is required for software synthesis." )
static int Open (vlc_object_t *);
static void Close (vlc_object_t *);
vlc_module_begin ()
set_description (N_("FluidSynth MIDI synthetizer"))
set_capability ("decoder", 100)
set_shortname (N_("FluidSynth"))
set_category (CAT_INPUT)
set_subcategory (SUBCAT_INPUT_ACODEC)
set_callbacks (Open, Close)
add_file ("soundfont", "", NULL,
SOUNDFONT_TEXT, SOUNDFONT_LONGTEXT, false);
vlc_module_end ()
struct decoder_sys_t
{
fluid_settings_t *settings;
fluid_synth_t *synth;
int soundfont;
bool fixed;
date_t end_date;
};
static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block);
static int Open (vlc_object_t *p_this)
{
decoder_t *p_dec = (decoder_t *)p_this;
decoder_sys_t *p_sys;
if (p_dec->fmt_in.i_codec != VLC_CODEC_MIDI)
return VLC_EGENERIC;
char *font_path = var_InheritString (p_this, "soundfont");
if (font_path == NULL)
{
msg_Err (p_this, "sound font file required for synthesis");
dialog_Fatal (p_this, _("MIDI synthesis not set up"),
_("A sound font file (.SF2) is required for MIDI synthesis.\n"
"Please install a sound font and configure it "
"from the VLC preferences (Codecs / Audio / FluidSynth).\n"));
return VLC_EGENERIC;
}
p_dec->pf_decode_audio = DecodeBlock;
p_sys = p_dec->p_sys = malloc (sizeof (*p_sys));
if (p_sys == NULL)
{
free (font_path);
return VLC_ENOMEM;
}
p_sys->settings = new_fluid_settings ();
p_sys->synth = new_fluid_synth (p_sys->settings);
/* FIXME: I bet this is not thread-safe */
const char *lpath = ToLocale (font_path);
p_sys->soundfont = fluid_synth_sfload (p_sys->synth, font_path, 1);
LocaleFree (lpath);
if (p_sys->soundfont == -1)
{
msg_Err (p_this, "cannot load sound fonts file %s", font_path);
Close (p_this);
dialog_Fatal (p_this, _("MIDI synthesis not set up"),
_("The specified sound font file (%s) is incorrect.\n"
"Please install a valid sound font and reconfigure it "
"from the VLC preferences (Codecs / Audio / FluidSynth).\n"),
font_path);
free (font_path);
return VLC_EGENERIC;
}
free (font_path);
p_dec->fmt_out.i_cat = AUDIO_ES;
p_dec->fmt_out.audio.i_rate = 44100;
p_dec->fmt_out.audio.i_channels = 2;
p_dec->fmt_out.audio.i_original_channels =
p_dec->fmt_out.audio.i_physical_channels =
AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
if (HAVE_FPU)
{
p_dec->fmt_out.i_codec = VLC_CODEC_FL32;
p_dec->fmt_out.audio.i_bitspersample = 32;
p_sys->fixed = false;
}
else
{
p_dec->fmt_out.i_codec = VLC_CODEC_S16N;
p_dec->fmt_out.audio.i_bitspersample = 16;
p_sys->fixed = true;
}
date_Init (&p_sys->end_date, p_dec->fmt_out.audio.i_rate, 1);
date_Set (&p_sys->end_date, 0);
return VLC_SUCCESS;
}
static void Close (vlc_object_t *p_this)
{
decoder_sys_t *p_sys = ((decoder_t *)p_this)->p_sys;
if (p_sys->soundfont != -1)
fluid_synth_sfunload (p_sys->synth, p_sys->soundfont, 1);
delete_fluid_synth (p_sys->synth);
delete_fluid_settings (p_sys->settings);
free (p_sys);
}
static aout_buffer_t *DecodeBlock (decoder_t *p_dec, block_t **pp_block)
{
block_t *p_block;
decoder_sys_t *p_sys = p_dec->p_sys;
aout_buffer_t *p_out = NULL;
if (pp_block == NULL)
return NULL;
p_block = *pp_block;
if (p_block == NULL)
return NULL;
*pp_block = NULL;
if (p_block->i_pts > VLC_TS_INVALID && !date_Get (&p_sys->end_date))
date_Set (&p_sys->end_date, p_block->i_pts);
else
if (p_block->i_pts < date_Get (&p_sys->end_date))
{
msg_Warn (p_dec, "MIDI message in the past?");
goto drop;
}
if (p_block->i_buffer < 1)
goto drop;
uint8_t event = p_block->p_buffer[0];
uint8_t channel = p_block->p_buffer[0] & 0xf;
event &= 0xF0;
if (event == 0xF0)
switch (channel)
{
case 0:
if (p_block->p_buffer[p_block->i_buffer - 1] != 0xF7)
{
case 7:
msg_Warn (p_dec, "fragmented SysEx not implemented");
goto drop;
}
fluid_synth_sysex (p_sys->synth, (char *)p_block->p_buffer + 1,
p_block->i_buffer - 2, NULL, NULL, NULL, 0);
break;
case 0xF:
fluid_synth_system_reset (p_sys->synth);
break;
}
uint8_t p1 = (p_block->i_buffer > 1) ? (p_block->p_buffer[1] & 0x7f) : 0;
uint8_t p2 = (p_block->i_buffer > 2) ? (p_block->p_buffer[2] & 0x7f) : 0;
switch (event & 0xF0)
{
case 0x80:
fluid_synth_noteoff (p_sys->synth, channel, p1);
break;
case 0x90:
fluid_synth_noteon (p_sys->synth, channel, p1, p2);
break;
/*case 0xA0: note aftertouch not implemented */
case 0xB0:
fluid_synth_cc (p_sys->synth, channel, p1, p2);
break;
case 0xC0:
fluid_synth_program_change (p_sys->synth, channel, p1);
break;
case 0xD0:
fluid_synth_channel_pressure (p_sys->synth, channel, p1);
break;
case 0xE0:
fluid_synth_pitch_bend (p_sys->synth, channel, (p2 << 7) | p1);
break;
}
unsigned samples =
(p_block->i_pts - date_Get (&p_sys->end_date)) * 441 / 10000;
if (samples == 0)
return NULL;
p_out = decoder_NewAudioBuffer (p_dec, samples);
if (p_out == NULL)
goto drop;
p_out->i_pts = date_Get (&p_sys->end_date );
p_out->i_length = date_Increment (&p_sys->end_date, samples)
- p_out->i_pts;
if (!p_sys->fixed)
fluid_synth_write_float (p_sys->synth, samples,
p_out->p_buffer, 0, 2,
p_out->p_buffer, 1, 2);
else
fluid_synth_write_s16 (p_sys->synth, samples,
(int16_t *)p_out->p_buffer, 0, 2,
(int16_t *)p_out->p_buffer, 1, 2);
drop:
block_Release (p_block);
return p_out;
}
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