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