b8d70d26fa
This update uses upstream commit f88ef828a600ce66d1f730c8fb2a7f580f6f6165. This update switches to use the new Munt C++ interface, which will allow ScummVM to link to an external Munt library instead of requiring it to be built-in in the future. For the moment, the emulator is still built-in, since it is not available from most package repositories. The Munt driver in ScummVM now uses writeSysex instead of the (now-private) playSysexWithoutFraming, per recommendation from the Munt team <https://github.com/munt/munt/pull/30>. This changeset also removes direct modifications that used to be made to Munt code, to ease future updates. To update Munt code in the future: 1. Replace all source files in the `softsynth/mt32` directory with new files from the upstream `mt32emu/src` directory; 2. Update `config.h` with the correct version number for the new version of Munt; 3. Update `module.mk` to add any new source files that need to be built.
362 lines
21 KiB
C
Executable file
362 lines
21 KiB
C
Executable file
/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
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* Copyright (C) 2011-2016 Dean Beeler, Jerome Fisher, Sergey V. Mikayev
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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 Lesser General Public License as published by
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* the Free Software Foundation, either version 2.1 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MT32EMU_C_INTERFACE_H
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#define MT32EMU_C_INTERFACE_H
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#include <stddef.h>
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#include "../globals.h"
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#include "c_types.h"
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#undef MT32EMU_EXPORT
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#define MT32EMU_EXPORT MT32EMU_EXPORT_ATTRIBUTE
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* == Context-independent functions == */
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/* === Interface handling === */
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/** Returns mt32emu_service_i interface. */
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MT32EMU_EXPORT const mt32emu_service_i mt32emu_get_service_i();
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#if MT32EMU_EXPORTS_TYPE == 2
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#undef MT32EMU_EXPORT
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#define MT32EMU_EXPORT
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#endif
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/**
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* Returns the version ID of mt32emu_report_handler_i interface the library has been compiled with.
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* This allows a client to fall-back gracefully instead of silently not receiving expected event reports.
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*/
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MT32EMU_EXPORT mt32emu_report_handler_version mt32emu_get_supported_report_handler_version();
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/**
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* Returns the version ID of mt32emu_midi_receiver_version_i interface the library has been compiled with.
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* This allows a client to fall-back gracefully instead of silently not receiving expected MIDI messages.
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*/
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MT32EMU_EXPORT mt32emu_midi_receiver_version mt32emu_get_supported_midi_receiver_version();
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/**
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* Returns library version as an integer in format: 0x00MMmmpp, where:
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* MM - major version number
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* mm - minor version number
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* pp - patch number
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*/
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MT32EMU_EXPORT mt32emu_bit32u mt32emu_get_library_version_int();
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/**
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* Returns library version as a C-string in format: "MAJOR.MINOR.PATCH".
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*/
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MT32EMU_EXPORT const char *mt32emu_get_library_version_string();
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/**
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* Returns output sample rate used in emulation of stereo analog circuitry of hardware units for particular analog_output_mode.
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* See comment for mt32emu_analog_output_mode.
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*/
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MT32EMU_EXPORT mt32emu_bit32u mt32emu_get_stereo_output_samplerate(const mt32emu_analog_output_mode analog_output_mode);
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/* == Context-dependent functions == */
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/** Initialises a new emulation context and installs custom report handler if non-NULL. */
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MT32EMU_EXPORT mt32emu_context mt32emu_create_context(mt32emu_report_handler_i report_handler, void *instance_data);
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/** Closes and destroys emulation context. */
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MT32EMU_EXPORT void mt32emu_free_context(mt32emu_context context);
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/**
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* Adds new ROM identified by its SHA1 digest to the emulation context replacing previously added ROM of the same type if any.
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* Argument sha1_digest can be NULL, in this case the digest will be computed using the actual ROM data.
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* If sha1_digest is set to non-NULL, it is assumed being correct and will not be recomputed.
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* This function doesn't immediately change the state of already opened synth. Newly added ROM will take effect upon next call of mt32emu_open_synth().
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* Returns positive value upon success.
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*/
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MT32EMU_EXPORT mt32emu_return_code mt32emu_add_rom_data(mt32emu_context context, const mt32emu_bit8u *data, size_t data_size, const mt32emu_sha1_digest *sha1_digest);
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/**
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* Loads a ROM file, identify it by SHA1 digest, and adds it to the emulation context replacing previously added ROM of the same type if any.
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* This function doesn't immediately change the state of already opened synth. Newly added ROM will take effect upon next call of mt32emu_open_synth().
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* Returns positive value upon success.
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*/
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MT32EMU_EXPORT mt32emu_return_code mt32emu_add_rom_file(mt32emu_context context, const char *filename);
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/**
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* Fills in mt32emu_rom_info structure with identifiers and descriptions of control and PCM ROM files identified and added to the synth context.
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* If one of the ROM files is not loaded and identified yet, NULL is returned in the corresponding fields of the mt32emu_rom_info structure.
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*/
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MT32EMU_EXPORT void mt32emu_get_rom_info(mt32emu_const_context context, mt32emu_rom_info *rom_info);
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/**
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* Allows to override the default maximum number of partials playing simultaneously within the emulation session.
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* This function doesn't immediately change the state of already opened synth. Newly set vale will take effect upon next call of mt32emu_open_synth().
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*/
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MT32EMU_EXPORT void mt32emu_set_partial_count(mt32emu_context context, const mt32emu_bit32u partial_count);
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/**
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* Allows to override the default mode for emulation of analogue circuitry of the hardware units within the emulation session.
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* This function doesn't immediately change the state of already opened synth. Newly set vale will take effect upon next call of mt32emu_open_synth().
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*/
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MT32EMU_EXPORT void mt32emu_set_analog_output_mode(mt32emu_context context, const mt32emu_analog_output_mode analog_output_mode);
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/**
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* Prepares the emulation context to receive MIDI messages and produce output audio data using aforehand added set of ROMs,
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* and optionally set the maximum partial count and the analog output mode.
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* Returns MT32EMU_RC_OK upon success.
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*/
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MT32EMU_EXPORT mt32emu_return_code mt32emu_open_synth(mt32emu_const_context context);
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/** Closes the emulation context freeing allocated resources. Added ROMs remain unaffected and ready for reuse. */
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MT32EMU_EXPORT void mt32emu_close_synth(mt32emu_const_context context);
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/** Returns true if the synth is in completely initialized state, otherwise returns false. */
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MT32EMU_EXPORT mt32emu_boolean mt32emu_is_open(mt32emu_const_context context);
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/**
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* Returns actual output sample rate used in emulation of stereo analog circuitry of hardware units.
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* See comment for mt32emu_analog_output_mode.
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*/
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MT32EMU_EXPORT mt32emu_bit32u mt32emu_get_actual_stereo_output_samplerate(mt32emu_const_context context);
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/** All the enqueued events are processed by the synth immediately. */
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MT32EMU_EXPORT void mt32emu_flush_midi_queue(mt32emu_const_context context);
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/**
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* Sets size of the internal MIDI event queue. The queue size is set to the minimum power of 2 that is greater or equal to the size specified.
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* The queue is flushed before reallocation.
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* Returns the actual queue size being used.
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*/
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MT32EMU_EXPORT mt32emu_bit32u mt32emu_set_midi_event_queue_size(mt32emu_const_context context, const mt32emu_bit32u queue_size);
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/**
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* Installs custom MIDI receiver object intended for receiving MIDI messages generated by MIDI stream parser.
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* MIDI stream parser is involved when functions mt32emu_parse_stream() and mt32emu_play_short_message() or the likes are called.
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* By default, parsed short MIDI messages and System Exclusive messages are sent to the synth input MIDI queue.
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* This function allows to override default behaviour. If midi_receiver argument is set to NULL, the default behaviour is restored.
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*/
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MT32EMU_EXPORT void mt32emu_set_midi_receiver(mt32emu_context context, mt32emu_midi_receiver_i midi_receiver, void *instance_data);
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/* Enqueues a MIDI event for subsequent playback.
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* The MIDI event will be processed not before the specified timestamp.
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* The timestamp is measured as the global rendered sample count since the synth was created (at the native sample rate 32000 Hz).
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* The minimum delay involves emulation of the delay introduced while the event is transferred via MIDI interface
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* and emulation of the MCU busy-loop while it frees partials for use by a new Poly.
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* Calls from multiple threads must be synchronised, although, no synchronisation is required with the rendering thread.
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* onMIDIQueueOverflow callback is invoked when the MIDI event queue is full and the message cannot be enqueued.
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*/
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/**
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* Parses a block of raw MIDI bytes and enqueues parsed MIDI messages for further processing ASAP.
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* SysEx messages are allowed to be fragmented across several calls to this method. Running status is also handled for short messages.
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* When a System Realtime MIDI message is parsed, onMIDISystemRealtime callback is invoked.
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* NOTE: the total length of a SysEx message being fragmented shall not exceed MT32EMU_MAX_STREAM_BUFFER_SIZE (32768 bytes).
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*/
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MT32EMU_EXPORT void mt32emu_parse_stream(mt32emu_const_context context, const mt32emu_bit8u *stream, mt32emu_bit32u length);
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/**
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* Parses a block of raw MIDI bytes and enqueues parsed MIDI messages to play at specified time.
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* SysEx messages are allowed to be fragmented across several calls to this method. Running status is also handled for short messages.
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* When a System Realtime MIDI message is parsed, onMIDISystemRealtime callback is invoked.
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* NOTE: the total length of a SysEx message being fragmented shall not exceed MT32EMU_MAX_STREAM_BUFFER_SIZE (32768 bytes).
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*/
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MT32EMU_EXPORT void mt32emu_parse_stream_at(mt32emu_const_context context, const mt32emu_bit8u *stream, mt32emu_bit32u length, mt32emu_bit32u timestamp);
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/**
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* Enqueues a single mt32emu_bit32u-encoded short MIDI message with full processing ASAP.
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* The short MIDI message may contain no status byte, the running status is used in this case.
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* When the argument is a System Realtime MIDI message, onMIDISystemRealtime callback is invoked.
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*/
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MT32EMU_EXPORT void mt32emu_play_short_message(mt32emu_const_context context, mt32emu_bit32u message);
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/**
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* Enqueues a single mt32emu_bit32u-encoded short MIDI message to play at specified time with full processing.
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* The short MIDI message may contain no status byte, the running status is used in this case.
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* When the argument is a System Realtime MIDI message, onMIDISystemRealtime callback is invoked.
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*/
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MT32EMU_EXPORT void mt32emu_play_short_message_at(mt32emu_const_context context, mt32emu_bit32u message, mt32emu_bit32u timestamp);
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/** Enqueues a single short MIDI message to be processed ASAP. The message must contain a status byte. */
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MT32EMU_EXPORT mt32emu_return_code mt32emu_play_msg(mt32emu_const_context context, mt32emu_bit32u msg);
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/** Enqueues a single well formed System Exclusive MIDI message to be processed ASAP. */
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MT32EMU_EXPORT mt32emu_return_code mt32emu_play_sysex(mt32emu_const_context context, const mt32emu_bit8u *sysex, mt32emu_bit32u len);
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/** Enqueues a single short MIDI message to play at specified time. The message must contain a status byte. */
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MT32EMU_EXPORT mt32emu_return_code mt32emu_play_msg_at(mt32emu_const_context context, mt32emu_bit32u msg, mt32emu_bit32u timestamp);
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/** Enqueues a single well formed System Exclusive MIDI message to play at specified time. */
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MT32EMU_EXPORT mt32emu_return_code mt32emu_play_sysex_at(mt32emu_const_context context, const mt32emu_bit8u *sysex, mt32emu_bit32u len, mt32emu_bit32u timestamp);
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/* WARNING:
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* The methods below don't ensure minimum 1-sample delay between sequential MIDI events,
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* and a sequence of NoteOn and immediately succeeding NoteOff messages is always silent.
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* A thread that invokes these methods must be explicitly synchronised with the thread performing sample rendering.
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*/
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/**
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* Sends a short MIDI message to the synth for immediate playback. The message must contain a status byte.
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* See the WARNING above.
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*/
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MT32EMU_EXPORT void mt32emu_play_msg_now(mt32emu_const_context context, mt32emu_bit32u msg);
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/**
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* Sends unpacked short MIDI message to the synth for immediate playback. The message must contain a status byte.
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* See the WARNING above.
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*/
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MT32EMU_EXPORT void mt32emu_play_msg_on_part(mt32emu_const_context context, mt32emu_bit8u part, mt32emu_bit8u code, mt32emu_bit8u note, mt32emu_bit8u velocity);
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/**
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* Sends a single well formed System Exclusive MIDI message for immediate processing. The length is in bytes.
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* See the WARNING above.
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*/
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MT32EMU_EXPORT void mt32emu_play_sysex_now(mt32emu_const_context context, const mt32emu_bit8u *sysex, mt32emu_bit32u len);
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/**
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* Sends inner body of a System Exclusive MIDI message for direct processing. The length is in bytes.
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* See the WARNING above.
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*/
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MT32EMU_EXPORT void mt32emu_write_sysex(mt32emu_const_context context, mt32emu_bit8u channel, const mt32emu_bit8u *sysex, mt32emu_bit32u len);
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/** Allows to disable wet reverb output altogether. */
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MT32EMU_EXPORT void mt32emu_set_reverb_enabled(mt32emu_const_context context, const mt32emu_boolean reverb_enabled);
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/** Returns whether wet reverb output is enabled. */
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MT32EMU_EXPORT mt32emu_boolean mt32emu_is_reverb_enabled(mt32emu_const_context context);
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/**
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* Sets override reverb mode. In this mode, emulation ignores sysexes (or the related part of them) which control the reverb parameters.
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* This mode is in effect until it is turned off. When the synth is re-opened, the override mode is unchanged but the state
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* of the reverb model is reset to default.
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*/
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MT32EMU_EXPORT void mt32emu_set_reverb_overridden(mt32emu_const_context context, const mt32emu_boolean reverb_overridden);
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/** Returns whether reverb settings are overridden. */
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MT32EMU_EXPORT mt32emu_boolean mt32emu_is_reverb_overridden(mt32emu_const_context context);
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/**
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* Forces reverb model compatibility mode. By default, the compatibility mode corresponds to the used control ROM version.
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* Invoking this method with the argument set to true forces emulation of old MT-32 reverb circuit.
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* When the argument is false, emulation of the reverb circuit used in new generation of MT-32 compatible modules is enforced
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* (these include CM-32L and LAPC-I).
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*/
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MT32EMU_EXPORT void mt32emu_set_reverb_compatibility_mode(mt32emu_const_context context, const mt32emu_boolean mt32_compatible_mode);
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/** Returns whether reverb is in old MT-32 compatibility mode. */
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MT32EMU_EXPORT mt32emu_boolean mt32emu_is_mt32_reverb_compatibility_mode(mt32emu_const_context context);
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/** Returns whether default reverb compatibility mode is the old MT-32 compatibility mode. */
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MT32EMU_EXPORT mt32emu_boolean mt32emu_is_default_reverb_mt32_compatible(mt32emu_const_context context);
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/** Sets new DAC input mode. See mt32emu_dac_input_mode for details. */
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MT32EMU_EXPORT void mt32emu_set_dac_input_mode(mt32emu_const_context context, const mt32emu_dac_input_mode mode);
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/** Returns current DAC input mode. See mt32emu_dac_input_mode for details. */
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MT32EMU_EXPORT mt32emu_dac_input_mode mt32emu_get_dac_input_mode(mt32emu_const_context context);
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/** Sets new MIDI delay mode. See mt32emu_midi_delay_mode for details. */
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MT32EMU_EXPORT void mt32emu_set_midi_delay_mode(mt32emu_const_context context, const mt32emu_midi_delay_mode mode);
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/** Returns current MIDI delay mode. See mt32emu_midi_delay_mode for details. */
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MT32EMU_EXPORT mt32emu_midi_delay_mode mt32emu_get_midi_delay_mode(mt32emu_const_context context);
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/**
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* Sets output gain factor for synth output channels. Applied to all output samples and unrelated with the synth's Master volume,
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* it rather corresponds to the gain of the output analog circuitry of the hardware units. However, together with mt32emu_set_reverb_output_gain()
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* it offers to the user a capability to control the gain of reverb and non-reverb output channels independently.
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* Ignored in MT32EMU_DAC_PURE mode.
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*/
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MT32EMU_EXPORT void mt32emu_set_output_gain(mt32emu_const_context context, float gain);
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/** Returns current output gain factor for synth output channels. */
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MT32EMU_EXPORT float mt32emu_get_output_gain(mt32emu_const_context context);
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/**
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* Sets output gain factor for the reverb wet output channels. It rather corresponds to the gain of the output
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* analog circuitry of the hardware units. However, together with mt32emu_set_output_gain() it offers to the user a capability
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* to control the gain of reverb and non-reverb output channels independently.
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*
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* Note: We're currently emulate CM-32L/CM-64 reverb quite accurately and the reverb output level closely
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* corresponds to the level of digital capture. Although, according to the CM-64 PCB schematic,
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* there is a difference in the reverb analogue circuit, and the resulting output gain is 0.68
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* of that for LA32 analogue output. This factor is applied to the reverb output gain.
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* Ignored in MT32EMU_DAC_PURE mode.
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*/
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MT32EMU_EXPORT void mt32emu_set_reverb_output_gain(mt32emu_const_context context, float gain);
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/** Returns current output gain factor for reverb wet output channels. */
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MT32EMU_EXPORT float mt32emu_get_reverb_output_gain(mt32emu_const_context context);
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/** Swaps left and right output channels. */
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MT32EMU_EXPORT void mt32emu_set_reversed_stereo_enabled(mt32emu_const_context context, const mt32emu_boolean enabled);
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/** Returns whether left and right output channels are swapped. */
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MT32EMU_EXPORT mt32emu_boolean mt32emu_is_reversed_stereo_enabled(mt32emu_const_context context);
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/**
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* Renders samples to the specified output stream as if they were sampled at the analog stereo output.
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* When mt32emu_analog_output_mode is set to ACCURATE (OVERSAMPLED), the output signal is upsampled to 48 (96) kHz in order
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* to retain emulation accuracy in whole audible frequency spectra. Otherwise, native digital signal sample rate is retained.
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* mt32emu_get_actual_stereo_output_samplerate() can be used to query actual sample rate of the output signal.
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* The length is in frames, not bytes (in 16-bit stereo, one frame is 4 bytes). Uses NATIVE byte ordering.
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*/
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MT32EMU_EXPORT void mt32emu_render_bit16s(mt32emu_const_context context, mt32emu_bit16s *stream, mt32emu_bit32u len);
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/** Same as above but outputs to a float stereo stream. */
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MT32EMU_EXPORT void mt32emu_render_float(mt32emu_const_context context, float *stream, mt32emu_bit32u len);
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/**
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* Renders samples to the specified output streams as if they appeared at the DAC entrance.
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* No further processing performed in analog circuitry emulation is applied to the signal.
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* NULL may be specified in place of any or all of the stream buffers to skip it.
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* The length is in samples, not bytes. Uses NATIVE byte ordering.
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*/
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MT32EMU_EXPORT void mt32emu_render_bit16s_streams(mt32emu_const_context context, const mt32emu_dac_output_bit16s_streams *streams, mt32emu_bit32u len);
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/** Same as above but outputs to float streams. */
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MT32EMU_EXPORT void mt32emu_render_float_streams(mt32emu_const_context context, const mt32emu_dac_output_float_streams *streams, mt32emu_bit32u len);
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/** Returns true when there is at least one active partial, otherwise false. */
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MT32EMU_EXPORT mt32emu_boolean mt32emu_has_active_partials(mt32emu_const_context context);
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/** Returns true if mt32emu_has_active_partials() returns true, or reverb is (somewhat unreliably) detected as being active. */
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MT32EMU_EXPORT mt32emu_boolean mt32emu_is_active(mt32emu_const_context context);
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/** Returns the maximum number of partials playing simultaneously. */
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MT32EMU_EXPORT mt32emu_bit32u mt32emu_get_partial_count(mt32emu_const_context context);
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/**
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* Returns current states of all the parts as a bit set. The least significant bit corresponds to the state of part 1,
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* total of 9 bits hold the states of all the parts. If the returned bit for a part is set, there is at least one active
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* non-releasing partial playing on this part. This info is useful in emulating behaviour of LCD display of the hardware units.
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*/
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MT32EMU_EXPORT mt32emu_bit32u mt32emu_get_part_states(mt32emu_const_context context);
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/**
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* Fills in current states of all the partials into the array provided. Each byte in the array holds states of 4 partials
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* starting from the least significant bits. The state of each partial is packed in a pair of bits.
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* The array must be large enough to accommodate states of all the partials.
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* @see getPartialCount()
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*/
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MT32EMU_EXPORT void mt32emu_get_partial_states(mt32emu_const_context context, mt32emu_bit8u *partial_states);
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/**
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* Fills in information about currently playing notes on the specified part into the arrays provided. The arrays must be large enough
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* to accommodate data for all the playing notes. The maximum number of simultaneously playing notes cannot exceed the number of partials.
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* Argument partNumber should be 0..7 for Part 1..8, or 8 for Rhythm.
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* Returns the number of currently playing notes on the specified part.
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*/
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MT32EMU_EXPORT mt32emu_bit32u mt32emu_get_playing_notes(mt32emu_const_context context, mt32emu_bit8u part_number, mt32emu_bit8u *keys, mt32emu_bit8u *velocities);
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/**
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* Returns name of the patch set on the specified part.
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* Argument partNumber should be 0..7 for Part 1..8, or 8 for Rhythm.
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*/
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MT32EMU_EXPORT const char *mt32emu_get_patch_name(mt32emu_const_context context, mt32emu_bit8u part_number);
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/** Stores internal state of emulated synth into an array provided (as it would be acquired from hardware). */
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MT32EMU_EXPORT void mt32emu_read_memory(mt32emu_const_context context, mt32emu_bit32u addr, mt32emu_bit32u len, mt32emu_bit8u *data);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif /* #ifndef MT32EMU_C_INTERFACE_H */
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