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oot/tools/audio/soundfont_compiler.c

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/**
* SPDX-FileCopyrightText: Copyright (C) 2024 ZeldaRET
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <alloca.h>
#include <assert.h>
#include <ctype.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "xml.h"
#include "aifc.h"
#include "samplebank.h"
#include "soundfont.h"
#include "util.h"
static_assert(sizeof(float) == sizeof(uint32_t), "Float is assumed to be 32-bit");
static float
i2f(uint32_t i)
{
union {
float f;
uint32_t i;
} fi;
fi.i = i;
return fi.f;
}
static uint32_t
f2i(float f)
{
union {
float f;
uint32_t i;
} fi;
fi.f = f;
return fi.i;
}
static int
midinote_to_z64note(int note)
{
// Converts from MIDI note number (middle C = 60) to Z64 note number (middle C = 39)
int z64note = note - 21;
if (z64note < 0) // % 128
z64note += 128;
return z64note;
}
/**
* Calculate the tuning value from a given samplerate and basenote.
*
* Uses a lookup table (gPitchFrequencies from the audio driver source) to compute the result of `2^(basenote / 12)`
* (with appropriate shifting such that the index for C4 results in 1.0)
*/
static float
calc_tuning(float sample_rate, int basenote)
{
static const float playback_sample_rate = 32000.0f; // Target samplerate in-game is 32KHz
static const float pitch_frequencies[] = {
// gPitchFrequencies in audio driver source
/* 0x00 */ 0.105112f, // PITCH_A0
/* 0x01 */ 0.111362f, // PITCH_BF0
/* 0x02 */ 0.117984f, // PITCH_B0
/* 0x03 */ 0.125f, // PITCH_C1
/* 0x04 */ 0.132433f, // PITCH_DF1
/* 0x05 */ 0.140308f, // PITCH_D1
/* 0x06 */ 0.148651f, // PITCH_EF1
/* 0x07 */ 0.15749f, // PITCH_E1
/* 0x08 */ 0.166855f, // PITCH_F1
/* 0x09 */ 0.176777f, // PITCH_GF1
/* 0x0A */ 0.187288f, // PITCH_G1
/* 0x0B */ 0.198425f, // PITCH_AF1
/* 0x0C */ 0.210224f, // PITCH_A1
/* 0x0D */ 0.222725f, // PITCH_BF1
/* 0x0E */ 0.235969f, // PITCH_B1
/* 0x0F */ 0.25f, // PITCH_C2
/* 0x10 */ 0.264866f, // PITCH_DF2
/* 0x11 */ 0.280616f, // PITCH_D2
/* 0x12 */ 0.297302f, // PITCH_EF2
/* 0x13 */ 0.31498f, // PITCH_E2
/* 0x14 */ 0.33371f, // PITCH_F2
/* 0x15 */ 0.353553f, // PITCH_GF2
/* 0x16 */ 0.374577f, // PITCH_G2
/* 0x17 */ 0.39685f, // PITCH_AF2
/* 0x18 */ 0.420448f, // PITCH_A2
/* 0x19 */ 0.445449f, // PITCH_BF2
/* 0x1A */ 0.471937f, // PITCH_B2
/* 0x1B */ 0.5f, // PITCH_C3
/* 0x1C */ 0.529732f, // PITCH_DF3
/* 0x1D */ 0.561231f, // PITCH_D3
/* 0x1E */ 0.594604f, // PITCH_EF3
/* 0x1F */ 0.629961f, // PITCH_E3
/* 0x20 */ 0.66742f, // PITCH_F3
/* 0x21 */ 0.707107f, // PITCH_GF3
/* 0x22 */ 0.749154f, // PITCH_G3
/* 0x23 */ 0.793701f, // PITCH_AF3
/* 0x24 */ 0.840897f, // PITCH_A3
/* 0x25 */ 0.890899f, // PITCH_BF3
/* 0x26 */ 0.943875f, // PITCH_B3
/* 0x27 */ 1.0f, // PITCH_C4 (Middle C)
/* 0x28 */ 1.059463f, // PITCH_DF4
/* 0x29 */ 1.122462f, // PITCH_D4
/* 0x2A */ 1.189207f, // PITCH_EF4
/* 0x2B */ 1.259921f, // PITCH_E4
/* 0x2C */ 1.33484f, // PITCH_F4
/* 0x2D */ 1.414214f, // PITCH_GF4
/* 0x2E */ 1.498307f, // PITCH_G4
/* 0x2F */ 1.587401f, // PITCH_AF4
/* 0x30 */ 1.681793f, // PITCH_A4
/* 0x31 */ 1.781798f, // PITCH_BF4
/* 0x32 */ 1.887749f, // PITCH_B4
/* 0x33 */ 2.0f, // PITCH_C5
/* 0x34 */ 2.118926f, // PITCH_DF5
/* 0x35 */ 2.244924f, // PITCH_D5
/* 0x36 */ 2.378414f, // PITCH_EF5
/* 0x37 */ 2.519842f, // PITCH_E5
/* 0x38 */ 2.66968f, // PITCH_F5
/* 0x39 */ 2.828428f, // PITCH_GF5
/* 0x3A */ 2.996615f, // PITCH_G5
/* 0x3B */ 3.174803f, // PITCH_AF5
/* 0x3C */ 3.363586f, // PITCH_A5
/* 0x3D */ 3.563596f, // PITCH_BF5
/* 0x3E */ 3.775498f, // PITCH_B5
/* 0x3F */ 4.0f, // PITCH_C6
/* 0x40 */ 4.237853f, // PITCH_DF6
/* 0x41 */ 4.489849f, // PITCH_D6
/* 0x42 */ 4.756829f, // PITCH_EF6
/* 0x43 */ 5.039685f, // PITCH_E6
/* 0x44 */ 5.33936f, // PITCH_F6
/* 0x45 */ 5.656855f, // PITCH_GF6
/* 0x46 */ 5.993229f, // PITCH_G6
/* 0x47 */ 6.349606f, // PITCH_AF6
/* 0x48 */ 6.727173f, // PITCH_A6
/* 0x49 */ 7.127192f, // PITCH_BF6
/* 0x4A */ 7.550996f, // PITCH_B6
/* 0x4B */ 8.0f, // PITCH_C7
/* 0x4C */ 8.475705f, // PITCH_DF7
/* 0x4D */ 8.979697f, // PITCH_D7
/* 0x4E */ 9.513658f, // PITCH_EF7
/* 0x4F */ 10.07937f, // PITCH_E7
/* 0x50 */ 10.6787205f, // PITCH_F7
/* 0x51 */ 11.31371f, // PITCH_GF7
/* 0x52 */ 11.986459f, // PITCH_G7
/* 0x53 */ 12.699211f, // PITCH_AF7
/* 0x54 */ 13.454346f, // PITCH_A7
/* 0x55 */ 14.254383f, // PITCH_BF7
/* 0x56 */ 15.101993f, // PITCH_B7
/* 0x57 */ 16.0f, // PITCH_C8
/* 0x58 */ 16.95141f, // PITCH_DF8
/* 0x59 */ 17.959395f, // PITCH_D8
/* 0x5A */ 19.027315f, // PITCH_EF8
/* 0x5B */ 20.15874f, // PITCH_E8
/* 0x5C */ 21.35744f, // PITCH_F8
/* 0x5D */ 22.62742f, // PITCH_GF8
/* 0x5E */ 23.972918f, // PITCH_G8
/* 0x5F */ 25.398422f, // PITCH_AF8
/* 0x60 */ 26.908691f, // PITCH_A8
/* 0x61 */ 28.508766f, // PITCH_BF8
/* 0x62 */ 30.203985f, // PITCH_B8
/* 0x63 */ 32.0f, // PITCH_C9
/* 0x64 */ 33.90282f, // PITCH_DF9
/* 0x65 */ 35.91879f, // PITCH_D9
/* 0x66 */ 38.05463f, // PITCH_EF9
/* 0x67 */ 40.31748f, // PITCH_E9
/* 0x68 */ 42.71488f, // PITCH_F9
/* 0x69 */ 45.25484f, // PITCH_GF9
/* 0x6A */ 47.945835f, // PITCH_G9
/* 0x6B */ 50.796845f, // PITCH_AF9
/* 0x6C */ 53.817383f, // PITCH_A9
/* 0x6D */ 57.017532f, // PITCH_BF9
/* 0x6E */ 60.40797f, // PITCH_B9
/* 0x6F */ 64.0f, // PITCH_C10
/* 0x70 */ 67.80564f, // PITCH_DF10
/* 0x71 */ 71.83758f, // PITCH_D10
/* 0x72 */ 76.10926f, // PITCH_EF10
/* 0x73 */ 80.63496f, // PITCH_E10
/* 0x74 */ 85.42976f, // PITCH_F10
/* 0x75 */ 0.055681f, // PITCH_BFNEG1
/* 0x76 */ 0.058992f, // PITCH_BNEG1
/* 0x77 */ 0.0625f, // PITCH_C0
/* 0x78 */ 0.066216f, // PITCH_DF0
/* 0x79 */ 0.070154f, // PITCH_D0
/* 0x7A */ 0.074325f, // PITCH_EF0
/* 0x7B */ 0.078745f, // PITCH_E0
/* 0x7C */ 0.083427f, // PITCH_F0
/* 0x7D */ 0.088388f, // PITCH_GF0
/* 0x7E */ 0.093644f, // PITCH_G0
/* 0x7F */ 0.099213f, // PITCH_AF0
};
return (sample_rate / playback_sample_rate) * pitch_frequencies[basenote];
}
void
read_envelopes_info(soundfont *sf, xmlNodePtr envelopes)
{
static const xml_attr_spec spec_env = {
{"Name", false, xml_parse_c_identifier, offsetof(envelope_data, name) },
{ "Release", false, xml_parse_u8, offsetof(envelope_data, release)},
};
static const xml_attr_spec spec_env_pt = {
{"Delay", false, xml_parse_s16, offsetof(envelope_point, delay)},
{ "Arg", false, xml_parse_s16, offsetof(envelope_point, arg) },
};
static const xml_attr_spec spec_env_goto = {
{"Index", false, xml_parse_s16, offsetof(envelope_point, arg)},
};
LL_FOREACH(xmlNodePtr, env, envelopes->children) {
if (env->type != XML_ELEMENT_NODE)
continue;
const char *name = XMLSTR_TO_STR(env->name);
if (!strequ(name, "Envelope"))
error("Unexpected element node %s in envelopes list (line %d)", name, env->line);
envelope_data *envdata;
if (env->children == NULL) {
// Empty envelopes for mm
envdata = (envelope_data *)malloc(sizeof(envelope_data));
envdata->name = NULL;
envdata->points = NULL;
envdata->release = 0;
envdata->n_points = 0;
} else {
size_t points_cap = 4;
size_t points_num = 0;
void *envelopes_data = malloc(sizeof(envelope_data) + points_cap * sizeof(envelope_point));
envdata = (envelope_data *)envelopes_data;
xml_parse_node_by_spec(envdata, env, spec_env, ARRAY_COUNT(spec_env));
// Ensure name is unique
LL_FOREACH(envelope_data *, envdata2, sf->envelopes) {
if (envdata2->name != NULL && strequ(envdata->name, envdata2->name))
error("Duplicate envelope name %s (second occurrence on line %d)", envdata->name, env->line);
}
envelope_point *pts = (envelope_point *)(envdata + 1);
LL_FOREACH(xmlNodePtr, env_pt, env->children) {
if (points_num >= points_cap) {
points_cap *= 2;
envelopes_data =
realloc(envelopes_data, sizeof(envelope_data) + points_cap * sizeof(envelope_point));
envdata = (envelope_data *)envelopes_data;
pts = (envelope_point *)(envdata + 1);
}
envelope_point *pt = &pts[points_num];
if (env_pt->type != XML_ELEMENT_NODE)
continue;
const char *pt_name = XMLSTR_TO_STR(env_pt->name);
if (strequ(pt_name, "Point")) {
xml_parse_node_by_spec(pt, env_pt, spec_env_pt, ARRAY_COUNT(spec_env_pt));
} else if (strequ(pt_name, "Disable")) {
pt->delay = ADSR_DISABLE;
pt->arg = 0;
} else if (strequ(pt_name, "Goto")) {
pt->delay = ADSR_GOTO;
xml_parse_node_by_spec(pt, env_pt, spec_env_goto, ARRAY_COUNT(spec_env_goto));
} else if (strequ(pt_name, "Restart")) {
pt->delay = ADSR_RESTART;
pt->arg = 0;
} else if (strequ(pt_name, "Hang")) {
pt->delay = ADSR_HANG;
pt->arg = 0;
// TODO force end here and don't emit an extra hang
} else {
error("Unexpected element node %s in envelope definition (line %d)", name, env->line);
}
points_num++;
}
envdata->points = pts;
envdata->n_points = points_num;
}
envdata->used = false;
// link
if (sf->envelopes == NULL) {
sf->envelopes = envdata;
sf->envelope_last = envdata;
} else {
sf->envelope_last->next = envdata;
sf->envelope_last = envdata;
}
envdata->next = NULL;
}
}
void
read_instrs_info(soundfont *sf, xmlNodePtr instrs)
{
static const xml_attr_spec instr_spec = {
{"ProgramNumber", true, xml_parse_uint, offsetof(instr_data, program_number) },
{ "Name", true, xml_parse_c_identifier, offsetof(instr_data, name) },
{ "Envelope", false, xml_parse_c_identifier, offsetof(instr_data, envelope_name) },
{ "Release", true, xml_parse_u8, offsetof(instr_data, release) },
{ "Sample", true, xml_parse_c_identifier, offsetof(instr_data, sample_name_mid) },
{ "BaseNote", true, xml_parse_note_number, offsetof(instr_data, base_note_mid) },
{ "SampleRate", true, xml_parse_double, offsetof(instr_data, sample_rate_mid) },
{ "RangeLo", true, xml_parse_note_number, offsetof(instr_data, sample_low_end) },
{ "SampleLo", true, xml_parse_c_identifier, offsetof(instr_data, sample_name_low) },
{ "BaseNoteLo", true, xml_parse_note_number, offsetof(instr_data, base_note_lo) },
{ "SampleRateLo", true, xml_parse_double, offsetof(instr_data, sample_rate_lo) },
{ "RangeHi", true, xml_parse_note_number, offsetof(instr_data, sample_high_start)},
{ "SampleHi", true, xml_parse_c_identifier, offsetof(instr_data, sample_name_high) },
{ "BaseNoteHi", true, xml_parse_note_number, offsetof(instr_data, base_note_hi) },
{ "SampleRateHi", true, xml_parse_double, offsetof(instr_data, sample_rate_hi) },
};
LL_FOREACH(xmlNodePtr, instr_node, instrs->children) {
if (instr_node->type != XML_ELEMENT_NODE)
continue;
const char *name = XMLSTR_TO_STR(instr_node->name);
bool is_instr = strequ(name, "Instrument");
bool is_instr_unused = strequ(name, "InstrumentUnused");
if (!is_instr && !is_instr_unused)
error("Unexpected element node %s in instrument list (line %d)", name, instr_node->line);
instr_data *instr = malloc(sizeof(instr_data));
instr->program_number = (unsigned)-1;
instr->name = NULL;
instr->sample_name_low = NULL;
instr->sample_name_mid = NULL;
instr->sample_name_high = NULL;
instr->sample_low_end = INSTR_LO_NONE;
instr->sample_low = NULL;
instr->sample_high_start = INSTR_HI_NONE;
instr->sample_high = NULL;
instr->base_note_mid = NOTE_UNSET;
instr->base_note_lo = NOTE_UNSET;
instr->base_note_hi = NOTE_UNSET;
instr->sample_rate_mid = -1.0;
instr->sample_rate_lo = -1.0;
instr->sample_rate_hi = -1.0;
instr->release = RELEASE_UNSET;
instr->unused = is_instr_unused;
xml_parse_node_by_spec(instr, instr_node, instr_spec, ARRAY_COUNT(instr_spec));
if (!is_instr_unused) {
// Check program number, midi program number range is 0-127 but the audio driver reserves 126 and 127 for
// sfx and percussion so the range we allow is 0-125
if (instr->program_number >= 126)
error("Program numbers must be in the range 0-125 (got %u on line %d)", instr->program_number,
instr_node->line);
// Ensure program number is unique
unsigned upper = instr->program_number >> 5 & 3;
unsigned lower = instr->program_number & 0x1F;
if (sf->program_number_bitset[upper] & (1 << lower))
error("Duplicate program number %u (second occurrence on line %d)", instr->program_number,
instr_node->line);
sf->program_number_bitset[upper] |= (1 << lower);
if (instr->program_number >= sf->info.num_instruments)
sf->info.num_instruments = instr->program_number + 1;
// Check name
if (instr->name == NULL)
error("Instrument must be named (line %d)", instr_node->line);
}
// Check envelope
instr->envelope = sf_get_envelope(sf, instr->envelope_name);
if (instr->envelope == NULL)
error("Bad envelope name %s (line %d)", instr->envelope_name, instr_node->line);
// Validate optionals
if (instr->release == RELEASE_UNSET)
instr->release = instr->envelope->release;
if (instr->sample_name_mid == NULL) {
// For a used instrument to have no sample path, it must have sample children and have specified at least
// one of RangeLo or RangeHi
if (instr->sample_low_end == INSTR_LO_NONE && instr->sample_high_start == INSTR_HI_NONE)
error("Instrument has no mid sample but also does not define a low or high sample (line %d)",
instr_node->line);
if (instr_node->children == NULL)
error("Instrument sample list is empty, must specify at least one sample (line %d)", instr_node->line);
bool seen_low = false;
bool seen_mid = false;
bool seen_high = false;
LL_FOREACH(xmlNodePtr, instr_sample_node, instr_node->children) {
if (instr_sample_node->type != XML_ELEMENT_NODE)
continue;
const char *name = XMLSTR_TO_STR(instr_sample_node->name);
if (!strequ(name, "Sample"))
error("Unexpected element node %s in instrument sample list (line %d)", name,
instr_sample_node->line);
if (instr_sample_node->properties == NULL)
error("Expected a Low/Mid/High sample path (line %d)", instr_sample_node->line);
xmlAttrPtr attr = instr_sample_node->properties;
if (attr->next != NULL)
error("Instrument sample should have exactly one attribute (line %d)", instr_sample_node->line);
const char *attr_name = XMLSTR_TO_STR(attr->name);
bool *seen;
const char **name_ptr;
if (strequ(attr_name, "Low")) {
seen = &seen_low;
name_ptr = &instr->sample_name_low;
if (instr->sample_low_end == INSTR_LO_NONE)
error("Useless Low sample specified (RangeLo is 0) (line %d)", instr_sample_node->line);
} else if (strequ(attr_name, "Mid")) {
seen = &seen_mid;
name_ptr = &instr->sample_name_mid;
} else if (strequ(attr_name, "High")) {
seen = &seen_high;
name_ptr = &instr->sample_name_high;
if (instr->sample_high_start == INSTR_HI_NONE)
error("Useless High sample specified (RangeHi is 127) (line %d)", instr_sample_node->line);
} else {
error("Unexpected attribute name for instrument sample (line %d)", instr_sample_node->line);
}
if (*seen)
error("Duplicate \"%s\" sample specifier in instrument sample (line %d)", attr_name,
instr_sample_node->line);
*seen = true;
xmlChar *xvalue = xmlNodeListGetString(instr_sample_node->doc, attr->children, 1);
const char *value = XMLSTR_TO_STR(xvalue);
xml_parse_c_identifier(value, name_ptr);
}
if (!seen_mid && instr->sample_low_end != instr->sample_high_start)
error("Unset-but-used Mid sample (line %d)", instr_node->line);
if (!seen_low && instr->sample_low_end != 0)
error("Unset-but-used Low sample (line %d)", instr_node->line);
if (!seen_high && instr->sample_high_start != 0)
error("Unset-but-used High sample (line %d)", instr_node->line);
}
if (instr->sample_name_low != NULL) {
instr->sample_low = sample_data_forname(sf, instr->sample_name_low);
if (instr->sample_low == NULL)
error("Bad sample name \"%s\" for LOW sample (line %d). Is it defined in <Samples>?",
instr->sample_name_low, instr_node->line);
if (instr->base_note_lo == NOTE_UNSET)
instr->base_note_lo = instr->sample_low->base_note;
if (instr->sample_rate_lo < 0.0)
instr->sample_rate_lo = instr->sample_low->sample_rate;
instr->sample_low_tuning = calc_tuning(instr->sample_rate_lo, instr->base_note_lo);
}
instr->sample_mid = sample_data_forname(sf, instr->sample_name_mid);
if (instr->sample_mid == NULL)
error("Bad sample name \"%s\" for MID sample (line %d). Is it defined in <Samples>?",
instr->sample_name_mid, instr_node->line);
if (instr->base_note_mid == NOTE_UNSET)
instr->base_note_mid = instr->sample_mid->base_note;
if (instr->sample_rate_mid < 0.0)
instr->sample_rate_mid = instr->sample_mid->sample_rate;
instr->sample_mid_tuning = calc_tuning(instr->sample_rate_mid, instr->base_note_mid);
// Some tuning values don't decompose properly into a samplerate and basenote, they must be accounted for here
// for matching. So far this has only been seen for an Instrument mid sample.
// NOTE: Keep in sync with the BAD_FLOATS list in extraction/tuning.py
if (f2i(instr->sample_mid_tuning) == 0x3E7319DF /* 0.237403377 */) // diff = 2^-24
instr->sample_mid_tuning = i2f(0x3E7319E3 /* 0.237403437 */);
if (instr->sample_name_high != NULL) {
instr->sample_high = sample_data_forname(sf, instr->sample_name_high);
if (instr->sample_high == NULL)
error("Bad sample name \"%s\" for HIGH sample (line %d). Is it defined in <Samples>?",
instr->sample_name_high, instr_node->line);
if (instr->base_note_hi == NOTE_UNSET)
instr->base_note_hi = instr->sample_high->base_note;
if (instr->sample_rate_hi < 0.0)
instr->sample_rate_hi = instr->sample_high->sample_rate;
instr->sample_high_tuning = calc_tuning(instr->sample_rate_hi, instr->base_note_hi);
}
// link
if (sf->instruments == NULL) {
sf->instruments = instr;
sf->instrument_last = instr;
} else {
sf->instrument_last->next = instr;
sf->instrument_last = instr;
}
instr->next = NULL;
}
}
void
read_drums_info(soundfont *sf, xmlNodePtr drums)
{
static const xml_attr_spec drum_spec = {
{"Name", false, xml_parse_c_identifier, offsetof(drum_data, name) },
{ "Note", true, xml_parse_note_number, offsetof(drum_data, note) },
{ "NoteStart", true, xml_parse_note_number, offsetof(drum_data, note_start) },
{ "NoteEnd", true, xml_parse_note_number, offsetof(drum_data, note_end) },
{ "Pan", false, xml_parse_int, offsetof(drum_data, pan) },
{ "Envelope", false, xml_parse_c_identifier, offsetof(drum_data, envelope_name)},
{ "Release", true, xml_parse_u8, offsetof(drum_data, release) },
{ "Sample", false, xml_parse_c_identifier, offsetof(drum_data, sample_name) },
{ "SampleRate", true, xml_parse_double, offsetof(drum_data, sample_rate) },
{ "BaseNote", true, xml_parse_note_number, offsetof(drum_data, base_note) },
};
LL_FOREACH(xmlNodePtr, drum_node, drums->children) {
if (drum_node->type != XML_ELEMENT_NODE)
continue;
const char *name = XMLSTR_TO_STR(drum_node->name);
if (!strequ(name, "Drum"))
error("Unexpected element node %s in drums list (line %d)", name, drum_node->line);
drum_data *drum = malloc(sizeof(drum_data));
drum->note = NOTE_UNSET;
drum->note_start = NOTE_UNSET;
drum->note_end = NOTE_UNSET;
drum->sample_rate = -1;
drum->base_note = NOTE_UNSET;
drum->release = RELEASE_UNSET;
if (drum_node->properties == NULL) {
// <Drum/>
drum->name = NULL;
drum->envelope = NULL;
drum->sample_name = NULL;
drum->sample = NULL;
goto link_drum;
}
xml_parse_node_by_spec(drum, drum_node, drum_spec, ARRAY_COUNT(drum_spec));
drum->envelope = sf_get_envelope(sf, drum->envelope_name);
if (drum->envelope == NULL)
error("Bad envelope name %s (line %d)", drum->envelope_name, drum_node->line);
// validate optionals
if (drum->release == RELEASE_UNSET)
drum->release = drum->envelope->release;
if (drum->note == NOTE_UNSET) {
if (drum->note_start == NOTE_UNSET || drum->note_end == NOTE_UNSET)
error("Incomplete note range specification (line %d)", drum_node->line);
} else {
if (drum->note_start != NOTE_UNSET || drum->note_end != NOTE_UNSET)
error("Overspecified note range (line %d)", drum_node->line);
drum->note_start = drum->note_end = drum->note;
}
if (drum->note_end < drum->note_start)
error("Invalid drum note range: [%d - %d] (line %d)", drum->note_start, drum->note_end, drum_node->line);
drum->sample = sample_data_forname(sf, drum->sample_name);
if (drum->sample == NULL)
error("Bad sample name \"%s\" (line %d). Is it defined in <Samples>?", drum->sample_name, drum_node->line);
// set final samplerate if not overridden
if (drum->sample_rate == -1) {
drum->sample_rate = drum->sample->sample_rate;
}
// set basenote if not overridden
if (drum->base_note == NOTE_UNSET) {
if (drum->sample->aifc.has_inst) {
drum->base_note = drum->sample->base_note;
} else {
error("No basenote for drum (line %d)", drum_node->line);
}
}
// link
link_drum:
if (sf->drums == NULL) {
sf->drums = drum;
sf->drums_last = drum;
} else {
sf->drums_last->next = drum;
sf->drums_last = drum;
}
drum->next = NULL;
}
}
void
read_sfx_info(soundfont *sf, xmlNodePtr effects)
{
static const xml_attr_spec sfx_spec = {
{"Name", false, xml_parse_c_identifier, offsetof(sfx_data, name) },
{ "Sample", false, xml_parse_c_identifier, offsetof(sfx_data, sample_name)},
{ "SampleRate", true, xml_parse_double, offsetof(sfx_data, sample_rate)},
{ "BaseNote", true, xml_parse_note_number, offsetof(sfx_data, base_note) },
};
LL_FOREACH(xmlNodePtr, sfx_node, effects->children) {
if (sfx_node->type != XML_ELEMENT_NODE)
continue;
const char *name = XMLSTR_TO_STR(sfx_node->name);
if (!strequ(name, "Effect"))
error("Unexpected element node %s in effects list (line %d)", name, sfx_node->line);
sf->info.num_effects++;
sfx_data *sfx = malloc(sizeof(sfx_data));
if (sfx_node->properties == NULL) {
sfx->sample = NULL;
} else {
sfx->sample_rate = -1;
sfx->base_note = NOTE_UNSET;
xml_parse_node_by_spec(sfx, sfx_node, sfx_spec, ARRAY_COUNT(sfx_spec));
sfx->sample = sample_data_forname(sf, sfx->sample_name);
if (sfx->sample == NULL)
error("Bad sample name \"%s\" (line %d). Is it defined in <Samples>?", sfx->sample_name,
sfx_node->line);
if (sfx->base_note == NOTE_UNSET)
sfx->base_note = sfx->sample->base_note;
if (sfx->sample_rate == -1)
sfx->sample_rate = sfx->sample->sample_rate;
sfx->tuning = calc_tuning(sfx->sample_rate, sfx->base_note);
}
// link
if (sf->sfx == NULL) {
sf->sfx = sfx;
sf->sfx_last = sfx;
} else {
sf->sfx_last->next = sfx;
sf->sfx_last = sfx;
}
sfx->next = NULL;
}
}
typedef struct {
bool is_dd;
bool cached;
} sample_data_defaults;
void
read_samples_info(soundfont *sf, xmlNodePtr samples)
{
static const xml_attr_spec samples_spec = {
{"IsDD", true, xml_parse_bool, offsetof(sample_data_defaults, is_dd) },
{ "Cached", true, xml_parse_bool, offsetof(sample_data_defaults, cached)},
};
static const xml_attr_spec sample_spec = {
{"Name", false, xml_parse_c_identifier, offsetof(sample_data, name) },
{ "SampleRate", true, xml_parse_double, offsetof(sample_data, sample_rate)},
{ "BaseNote", true, xml_parse_note_number, offsetof(sample_data, base_note) },
{ "IsDD", true, xml_parse_bool, offsetof(sample_data, is_dd) },
{ "Cached", true, xml_parse_bool, offsetof(sample_data, cached) },
};
sample_data_defaults defaults;
defaults.is_dd = false;
defaults.cached = false;
xml_parse_node_by_spec(&defaults, samples, samples_spec, ARRAY_COUNT(samples_spec));
LL_FOREACH(xmlNodePtr, sample_node, samples->children) {
if (sample_node->type != XML_ELEMENT_NODE)
continue;
const char *name = XMLSTR_TO_STR(sample_node->name);
if (!strequ(name, "Sample"))
error("Unexpected element node %s in samples list (line %d)", name, sample_node->line);
sample_data *sample = malloc(sizeof(sample_data));
sample->sample_rate = -1.0;
sample->base_note = NOTE_UNSET;
sample->is_dd = defaults.is_dd;
sample->cached = defaults.cached;
xml_parse_node_by_spec(sample, sample_node, sample_spec, ARRAY_COUNT(sample_spec));
samplebank *sb = (sample->is_dd) ? &sf->sbdd : &sf->sb;
const char *sample_path = samplebank_path_forname(sb, sample->name);
if (sample_path == NULL)
error("Bad sample name %s, does it exist in the samplebank? (line %d)", sample->name, sample_node->line);
aifc_read(&sample->aifc, sample_path, NULL, NULL);
if (sample->sample_rate == -1.0)
sample->sample_rate = sample->aifc.sample_rate;
if (sample->base_note == NOTE_UNSET) {
if (sample->aifc.has_inst)
sample->base_note = midinote_to_z64note(sample->aifc.basenote);
else
error("No basenote for sample %s (line %d)", sample->name, sample_node->line);
}
if (!sample->aifc.has_book)
error("No vadpcm codebook for sample %s (line %d)", sample->name, sample_node->line);
// link
if (sf->samples == NULL) {
sf->samples = sample;
sf->sample_last = sample;
} else {
sf->sample_last->next = sample;
sf->sample_last = sample;
}
sample->next = NULL;
}
}
static bool
is_hex(char c)
{
return ('0' <= c && c <= '9') || ('A' <= c && c <= 'F');
}
static int
from_hex(char c)
{
if ('0' <= c && c <= '9')
return c - '0';
if ('A' <= c && c <= 'F')
return c - 'A' + 10;
assert(false);
return -0xABABABAB;
}
void
read_match_padding(soundfont *sf, xmlNodePtr padding_decl)
{
if (padding_decl->properties != NULL)
error("Unexpected properties for MatchPadding declaration (line %d)", padding_decl->line);
if (padding_decl->children == NULL || padding_decl->children->content == NULL)
error("No data declared for MatchPadding (line %d)", padding_decl->line);
if (padding_decl->children->next != NULL)
error("Unexpected layout for MatchPadding declaration (line %d)", padding_decl->line);
const char *data_str = XMLSTR_TO_STR(padding_decl->children->content);
size_t data_len = strlen(data_str);
// We expect padding to be bytes like 0xAB separated by comma or whitespace, so string length / 5 is the upper bound
uint8_t *padding = malloc(data_len / 5);
size_t k = 0;
bool must_be_delimiter = false;
for (size_t i = 0; i < data_len - 4; i++) {
if (isspace(data_str[i]) || data_str[i] == ',') {
must_be_delimiter = false;
continue;
}
if (must_be_delimiter)
error("Malformed padding data, expected a space or comma at position %ld", i);
if (data_str[i + 0] != '0' || data_str[i + 1] != 'x')
error("Malformed padding data, expected an 0x prefix at position %ld", i);
char c1 = toupper(data_str[i + 2]);
char c2 = toupper(data_str[i + 3]);
if (!is_hex(c1) || !is_hex(c2))
error("Malformed padding data, expected hexadecimal digits at position %ld", i + 2);
padding[k++] = (from_hex(c1) << 4) | from_hex(c2);
must_be_delimiter = true;
i += 3;
}
sf->match_padding = padding;
sf->match_padding_num = k;
}
/**
* Emit a padding statement that pads to the next 0x10 byte boundary. Assumes that `pos` measures from an 0x10-byte
* aligned location.
*/
static void
emit_padding_stmt(FILE *out, unsigned pos)
{
switch (ALIGN16(pos) - pos) {
case 0:
// Already aligned, pass silently
break;
case 4:
fprintf(out, "SF_PAD4();\n");
break;
case 8:
fprintf(out, "SF_PAD8();\n");
break;
case 0xC:
fprintf(out, "SF_PADC();\n");
break;
default:
// We don't expect to need to support alignment from anything less than word-aligned.
error("[Internal] Bad alignment generated");
break;
}
}
size_t
emit_c_header(FILE *out, soundfont *sf)
{
size_t size = 0;
fprintf(out, "// HEADER\n\n");
// Generate externs for use in the header.
if (sf->drums != NULL)
fprintf(out, "extern Drum* SF%d_DRUMS_PTR_LIST[];\n\n", sf->info.index);
if (sf->sfx != NULL)
fprintf(out, "extern SoundEffect SF%d_SFX_LIST[];\n\n", sf->info.index);
if (sf->instruments != NULL) {
// Externs are emitted in struct order
LL_FOREACH(instr_data *, instr, sf->instruments) {
if (instr->unused)
continue;
fprintf(out, "extern Instrument SF%d_%s;\n", sf->info.index, instr->name);
}
fprintf(out, "\n");
}
// Generate the header itself: drums -> sfx -> instruments.
// We always need to write pointers for drums and sfx even if they are NULL.
uint32_t pos = 0;
if (sf->drums != NULL)
fprintf(out, "NO_REORDER SECTION_DATA Drum** SF%d_DRUMS_PTR_LIST_PTR = SF%d_DRUMS_PTR_LIST;\n", sf->info.index,
sf->info.index);
else
fprintf(out, "NO_REORDER SECTION_DATA Drum** SF%d_DRUMS_PTR_LIST_PTR = NULL;\n", sf->info.index);
pos += 4;
size += 4;
if (sf->sfx != NULL)
fprintf(out, "NO_REORDER SECTION_DATA SoundEffect* SF%d_SFX_LIST_PTR = SF%d_SFX_LIST;\n", sf->info.index,
sf->info.index);
else
fprintf(out, "NO_REORDER SECTION_DATA SoundEffect* SF%d_SFX_LIST_PTR = NULL;\n", sf->info.index);
pos += 4;
size += 4;
if (sf->instruments != NULL) {
const char **instr_names = calloc(sf->info.num_instruments, sizeof(const char *));
// The instrument pointer table is indexed by program number. Since sf->instruments is sorted by struct index
// we must first sort by program number.
LL_FOREACH(instr_data *, instr, sf->instruments) {
if (instr->unused)
continue; // Unused instruments are not included in the table and have no meaningful program number
instr_names[instr->program_number] = instr->name;
}
fprintf(out, "NO_REORDER SECTION_DATA Instrument* SF%d_INSTRUMENT_PTR_LIST[] = {\n", sf->info.index);
for (unsigned i = 0; i < sf->info.num_instruments; i++) {
if (instr_names[i] == NULL)
fprintf(out, " NULL,\n");
else
fprintf(out, " &SF%d_%s,\n", sf->info.index, instr_names[i]);
pos += 4;
size += 4;
}
fprintf(out, "};\n");
free(instr_names);
}
// Pad the header to the next 0x10-byte boundary.
emit_padding_stmt(out, pos);
fprintf(out, "\n");
return ALIGN16(size);
}
/**
* Convert the compression type as indicated in the AIFC to the corresponding SampleCodec enum value.
* These must be kept in sync with the SampleCodec definition!
*/
static const char *
codec_enum(uint32_t compression_type, const char *origin_file)
{
switch (compression_type) {
case CC4('A', 'D', 'P', '9'):
return "CODEC_ADPCM";
case CC4('H', 'P', 'C', 'M'):
return "CODEC_S8";
case CC4('A', 'D', 'P', '5'):
return "CODEC_SMALL_ADPCM";
case CC4('R', 'V', 'R', 'B'):
return "CODEC_REVERB";
case CC4('N', 'O', 'N', 'E'):
return "CODEC_S16";
}
error("Bad compression type in aifc file %s", origin_file);
__builtin_unreachable();
}
static unsigned int
codec_frame_size(uint32_t compression_type)
{
switch (compression_type) {
case CC4('A', 'D', 'P', '9'):
return 9;
case CC4('A', 'D', 'P', '5'):
return 5;
default: // TODO should any others not use 16?
return 16;
}
}
/**
* Compare the codebooks of two samples. Returns true if they are identical.
*/
static bool
samples_books_equal(sample_data *s1, sample_data *s2)
{
int32_t s1_order = s1->aifc.book.order;
int32_t s1_npredictors = s1->aifc.book.npredictors;
int32_t s2_order = s1->aifc.book.order;
int32_t s2_npredictors = s1->aifc.book.npredictors;
if (s1_order != s2_order || s1_npredictors != s2_npredictors)
return false;
return !memcmp(*s1->aifc.book_state, *s2->aifc.book_state, 8 * (unsigned)s1_order * (unsigned)s1_npredictors);
}
/**
* Writes all samples, their codebooks and their loops to C structures.
*/
size_t
emit_c_samples(FILE *out, soundfont *sf)
{
size_t size = 0;
if (sf->samples == NULL)
return size;
int i = 0;
LL_FOREACH(sample_data *, sample, sf->samples) {
// Determine if we need to write a new book structure. If we've already emitted a book structure with the
// same contents we use that instead.
bool new_book = true;
const char *bookname = sample->name;
LL_FOREACH(sample_data *, sample2, sf->samples) {
if (sample2 == sample)
// Caught up to our current position, we need to write a new book.
break;
if (samples_books_equal(sample, sample2)) {
// A book that we've already seen is the same as this one. Since the book we are comparing to here is
// the first such book, this is guaranteed to have already been written and we move the reference to
// this one.
new_book = false;
bookname = sample2->name;
break;
}
}
fprintf(out, "// SAMPLE %d\n\n", i);
// Write the sample header
samplebank *sb = (sample->is_dd) ? &sf->sbdd : &sf->sb;
// Note: We could skip writing the book extern if new_book is false, but it's probably not worth the extra code
fprintf(out,
// clang-format off
"extern u8 %s_%s_Off[];" "\n"
"extern AdpcmBook SF%d_%s_BOOK;" "\n"
"extern AdpcmLoop SF%d_%s_LOOP;" "\n"
"\n",
// clang-format on
sb->name, sample->name, sf->info.index, bookname, sf->info.index, sample->name);
const char *codec_name = codec_enum(sample->aifc.compression_type, sample->aifc.path);
fprintf(out,
// clang-format off
"NO_REORDER SECTION_DATA ALIGNED(16) Sample SF%d_%s_HEADER = {" "\n"
" "
#ifdef SFC_MM
// MM has an extra unused field in the sample structure compared to OoT
"%d, "
#endif
"%s, %d, %s, %s," "\n"
" 0x%06lX," "\n"
" %s_%s_Off," "\n"
" &SF%d_%s_LOOP," "\n"
" &SF%d_%s_BOOK," "\n"
"};" "\n"
"\n",
// clang-format on
sf->info.index, sample->name,
#ifdef SFC_MM
0,
#endif
codec_name, sample->is_dd, BOOL_STR(sample->cached), BOOL_STR(false), sample->aifc.ssnd_size, sb->name,
sample->name, sf->info.index, sample->name, sf->info.index, bookname);
size += 0x10;
// Write the book if it hasn't been deduplicated.
if (new_book) {
// Since books are variable-size structures and we want to support a C89 compiler, we first write the
// header as one structure and the book state as an array. We then declare a weak symbol for the book
// header to alias it to the correct type without casts, avoiding potential type conflicts with externs.
size_t book_size = 0;
fprintf(out,
// clang-format off
"NO_REORDER SECTION_DATA ALIGNED(16) AdpcmBookHeader SF%d_%s_BOOK_HEADER = {" "\n"
" %d, %d," "\n"
"};" "\n"
"NO_REORDER SECTION_DATA AdpcmBookData SF%d_%s_BOOK_DATA = {" "\n",
// clang-format on
sf->info.index, bookname, sample->aifc.book.order, sample->aifc.book.npredictors, sf->info.index,
bookname);
book_size += 8;
for (size_t j = 0; j < (unsigned)sample->aifc.book.order * (unsigned)sample->aifc.book.npredictors; j++) {
fprintf(
out,
// clang-format off
" (s16)0x%04X, (s16)0x%04X, (s16)0x%04X, (s16)0x%04X, "
"(s16)0x%04X, (s16)0x%04X, (s16)0x%04X, (s16)0x%04X,\n",
// clang-format on
(uint16_t)(*sample->aifc.book_state)[j * 8 + 0], (uint16_t)(*sample->aifc.book_state)[j * 8 + 1],
(uint16_t)(*sample->aifc.book_state)[j * 8 + 2], (uint16_t)(*sample->aifc.book_state)[j * 8 + 3],
(uint16_t)(*sample->aifc.book_state)[j * 8 + 4], (uint16_t)(*sample->aifc.book_state)[j * 8 + 5],
(uint16_t)(*sample->aifc.book_state)[j * 8 + 6], (uint16_t)(*sample->aifc.book_state)[j * 8 + 7]);
}
fprintf(out,
// clang-format off
"};" "\n"
"#pragma weak SF%d_%s_BOOK = SF%d_%s_BOOK_HEADER" "\n",
// clang-format on
sf->info.index, bookname, sf->info.index, bookname);
// We assume here that book structures begin on 0x10-byte boundaries. Book structures are always
// `4 + 4 + 8 * order * npredictors` large, emit a padding statement to the next 0x10-byte boundary.
book_size += 2 * 8 * (unsigned)sample->aifc.book.order * (unsigned)sample->aifc.book.npredictors;
emit_padding_stmt(out, book_size);
fprintf(out, "\n");
size += ALIGN16(book_size);
}
// Write the loop
// Can't use sample->aifc.num_frames directly, the original vadpcm_enc tool occasionally got the number
// of frames wrong (off-by-1) which we must reproduce here for matching (rather than reproducing it in the
// aifc and wav/aiff files themselves)
uint32_t frame_count = (sample->aifc.ssnd_size * 16) / codec_frame_size(sample->aifc.compression_type);
// We cannot deduplicate or skip writing loops in general as the audio driver assumes that at least a loop
// header exists for every sample. We could deduplicate on the special case that two samples have the same
// frame count? TODO
if (!sample->aifc.has_loop || sample->aifc.loop.count == 0) {
// No loop present, or a loop with a count of 0 was explicitly written into the aifc.
// Write a header only, using the same weak symbol trick as with books.
uint32_t start;
uint32_t end;
uint32_t count;
if (!sample->aifc.has_loop) {
// No loop, write a loop header that spans the entire sample with a count of 0.
// The audio driver expects that a loop structure always exists for a sample.
start = 0;
end = frame_count;
count = 0;
} else {
// There is a count=0 loop in the aifc file, trust it.
start = sample->aifc.loop.start;
end = sample->aifc.loop.end;
count = sample->aifc.loop.count;
}
fprintf(out,
// clang-format off
"NO_REORDER SECTION_DATA ALIGNED(16) AdpcmLoopHeader SF%d_%s_LOOP_HEADER = {" "\n"
" %u, %u, %u, 0," "\n"
"};" "\n"
"#pragma weak SF%d_%s_LOOP = SF%d_%s_LOOP_HEADER" "\n"
"\n",
// clang-format on
sf->info.index, sample->name, start, end, count, sf->info.index, sample->name, sf->info.index,
sample->name);
size += 0x10;
} else {
// With state, since loop states are a fixed size there is no need for a weak alias.
// Some soundfonts include the total frame count of the sample, but not all of them.
// Set the frame count to 0 here to inhibit writing it into the loop structure if this is
// a soundfont that does not include it.
if (!sf->info.loops_have_frames)
frame_count = 0;
char count_str[12];
if (sample->aifc.loop.count == 0xFFFFFFFF)
snprintf(count_str, sizeof(count_str), "0x%08X", sample->aifc.loop.count);
else
snprintf(count_str, sizeof(count_str), "%u", sample->aifc.loop.count);
fprintf(out,
// clang-format off
"NO_REORDER SECTION_DATA ALIGNED(16) AdpcmLoop SF%d_%s_LOOP = {" "\n"
" { %u, %u, %s, %u }," "\n"
" {" "\n"
" (s16)0x%04X, (s16)0x%04X, (s16)0x%04X, (s16)0x%04X," "\n"
" (s16)0x%04X, (s16)0x%04X, (s16)0x%04X, (s16)0x%04X," "\n"
" (s16)0x%04X, (s16)0x%04X, (s16)0x%04X, (s16)0x%04X," "\n"
" (s16)0x%04X, (s16)0x%04X, (s16)0x%04X, (s16)0x%04X," "\n"
" }," "\n"
"};" "\n"
"\n",
// clang-format on
sf->info.index, sample->name, sample->aifc.loop.start, sample->aifc.loop.end, count_str,
frame_count, (uint16_t)sample->aifc.loop.state[0], (uint16_t)sample->aifc.loop.state[1],
(uint16_t)sample->aifc.loop.state[2], (uint16_t)sample->aifc.loop.state[3],
(uint16_t)sample->aifc.loop.state[4], (uint16_t)sample->aifc.loop.state[5],
(uint16_t)sample->aifc.loop.state[6], (uint16_t)sample->aifc.loop.state[7],
(uint16_t)sample->aifc.loop.state[8], (uint16_t)sample->aifc.loop.state[9],
(uint16_t)sample->aifc.loop.state[10], (uint16_t)sample->aifc.loop.state[11],
(uint16_t)sample->aifc.loop.state[12], (uint16_t)sample->aifc.loop.state[13],
(uint16_t)sample->aifc.loop.state[14], (uint16_t)sample->aifc.loop.state[15]);
size += 0x30;
}
i++;
}
return size;
}
/**
* Write envelope structures.
*/
size_t
emit_c_envelopes(FILE *out, soundfont *sf)
{
size_t size = 0;
if (sf->envelopes == NULL)
return size;
fprintf(out, "// ENVELOPES\n\n");
size_t empty_num = 0;
LL_FOREACH(envelope_data *, envdata, sf->envelopes) {
if (sf->matching && envdata->name == NULL) {
// For MM: write 16 bytes of 0 when matching
fprintf(out,
// clang-format off
"NO_REORDER SECTION_DATA ALIGNED(16) EnvelopePoint SF%d_ENV_EMPTY_%lu[] = {" "\n"
" { 0, 0, }," "\n"
" { 0, 0, }," "\n"
" { 0, 0, }," "\n"
" { 0, 0, }," "\n"
"};" "\n"
"\n",
// clang-format on
sf->info.index, empty_num);
empty_num++;
size += 0x10;
} else {
fprintf(out, "NO_REORDER SECTION_DATA ALIGNED(16) EnvelopePoint SF%d_%s[] = {\n", sf->info.index,
envdata->name);
// Write all points
for (size_t j = 0; j < envdata->n_points; j++) {
envelope_point *pt = &envdata->points[j];
switch (pt->delay) {
case ADSR_DISABLE:
fprintf(out, " ENVELOPE_DISABLE(),\n");
break;
case ADSR_GOTO:
fprintf(out, " ENVELOPE_GOTO(%d),\n", pt->arg);
break;
case ADSR_HANG:
fprintf(out, " ENVELOPE_HANG(),\n");
break;
case ADSR_RESTART:
fprintf(out, " ENVELOPE_RESTART(),\n");
break;
default:
fprintf(out, " ENVELOPE_POINT(%5d, %5d),\n", pt->delay, pt->arg);
break;
}
}
// Automatically add a HANG command at the end
fprintf(out, " ENVELOPE_HANG(),\n"
"};\n");
// Pad to 0x10-byte boundary
size_t env_size = 4 * (envdata->n_points + 1);
emit_padding_stmt(out, env_size);
fprintf(out, "\n");
size += ALIGN16(env_size);
}
}
return size;
}
#define F32_FMT "%.22f"
size_t
emit_c_instruments(FILE *out, soundfont *sf)
{
size_t size = 0;
fprintf(out, "// INSTRUMENTS\n\n");
size_t unused_instr_num = 0;
LL_FOREACH(instr_data *, instr, sf->instruments) {
if (instr->unused) {
fprintf(out, "NO_REORDER SECTION_DATA Instrument SF%d_INSTR_UNUSED_%lu = {\n", sf->info.index,
unused_instr_num);
unused_instr_num++;
} else {
fprintf(out, "NO_REORDER SECTION_DATA Instrument SF%d_%s = {\n", sf->info.index, instr->name);
}
char nlo[5];
snprintf(nlo, sizeof(nlo), "%3d", instr->sample_low_end);
char nhi[5];
snprintf(nhi, sizeof(nhi), "%3d", instr->sample_high_start);
fprintf(out,
// clang-format off
" false," "\n"
" %s," "\n"
" %s," "\n"
" %d," "\n"
" SF%d_%s," "\n",
// clang-format on
(instr->sample_low_end == INSTR_LO_NONE) ? "INSTR_SAMPLE_LO_NONE" : nlo,
(instr->sample_high_start == INSTR_HI_NONE) ? "INSTR_SAMPLE_HI_NONE" : nhi, instr->release,
sf->info.index, instr->envelope_name);
if (instr->sample_low != NULL)
fprintf(out, " { &SF%d_%s_HEADER, " F32_FMT "f },\n", sf->info.index, instr->sample_name_low,
instr->sample_low_tuning);
else
fprintf(out, " INSTR_SAMPLE_NONE,\n");
fprintf(out, " { &SF%d_%s_HEADER, " F32_FMT "f },\n", sf->info.index, instr->sample_name_mid,
instr->sample_mid_tuning);
if (instr->sample_high != NULL)
fprintf(out, " { &SF%d_%s_HEADER, " F32_FMT "f },\n", sf->info.index, instr->sample_name_high,
instr->sample_high_tuning);
else
fprintf(out, " INSTR_SAMPLE_NONE,\n");
fprintf(out, "};\n\n");
size += 0x20;
}
return size;
}
size_t
emit_c_drums(FILE *out, soundfont *sf)
{
size_t size = 0;
if (sf->drums == NULL)
return size;
fprintf(out, "// DRUMS\n\n");
// Prepare pointer table data to be filled in while writing the drum structures. Init to 0 so if any low notes are
// not covered by any drum group the name will be NULL.
struct {
const char *name;
int n;
} ptr_table[64];
memset(ptr_table, 0, sizeof(ptr_table));
// While writing the drum structures we record the maximum note covered by this soundfont. Some "oddball" soundfonts
// like soundfont 0 do not have an array entry for all 64 notes. We use this to know when to stop writing entries in
// the pointer table.
int max_note = -1;
LL_FOREACH(drum_data *, drum, sf->drums) {
if (drum->name == NULL) {
max_note++;
continue;
}
if (drum->note_end > max_note)
max_note = drum->note_end;
size_t length = drum->note_end - drum->note_start + 1;
// Drum structures are duplicated for each note in the range they cover, the basenote for each is incremented
// by one but the data is otherwise identical. We write a preprocessor definition to make the resulting source
// more compact for easier inspection.
fprintf(out,
// clang-format off
"#define SF%d_%s_ENTRY(tuning) \\" "\n"
" { \\" "\n"
" %d, \\" "\n"
" %d, \\" "\n"
" false, \\" "\n"
" { &SF%d_%s_HEADER, (tuning) }, \\" "\n"
" SF%d_%s, \\" "\n"
" }" "\n"
"NO_REORDER SECTION_DATA Drum SF%d_%s[%lu] = {" "\n",
// clang-format on
sf->info.index, drum->name, drum->release, drum->pan, sf->info.index, drum->sample->name,
sf->info.index, drum->envelope->name, sf->info.index, drum->name, length);
// Write each structure while building the drum pointer table
if (drum->note_end + 1 > 64)
error("Bad drum range for drum spanning %d to %d, should be within 0 to 63", drum->note_start,
drum->note_end);
for (size_t note_offset = 0; note_offset < length; note_offset++) {
size_t ptr_offset = drum->note_start + note_offset;
ptr_table[ptr_offset].name = drum->name;
ptr_table[ptr_offset].n = note_offset;
// wrap note on overflow
int note = drum->base_note + note_offset;
if (note > 127)
note -= 128;
float tuning = calc_tuning(drum->sample_rate, note);
fprintf(out, " SF%d_%s_ENTRY(" F32_FMT "f),\n", sf->info.index, drum->name, tuning);
}
fprintf(out, "};\n\n");
size += 0x10 * length;
}
// Write the drum pointer table. Always start at 0 and end at the maximum used note. If any low notes are not used,
// NULL is written into the array.
size_t table_len = max_note + 1;
if (table_len > 64)
error("Bad drum pointer table length %lu, should be at most 64", table_len);
fprintf(out, "NO_REORDER SECTION_DATA ALIGNED(16) Drum* SF%d_DRUMS_PTR_LIST[%lu] = {\n", sf->info.index, table_len);
for (size_t i = 0; i < table_len; i++) {
if (ptr_table[i].name == NULL) {
fprintf(out, " NULL,\n");
continue;
}
if (i != 0 && ptr_table[i].n == 0) // Add some space between different drum groups
fprintf(out, "\n");
fprintf(out, " &SF%d_%s[%d],\n", sf->info.index, ptr_table[i].name, ptr_table[i].n);
}
sf->info.num_drums = table_len;
fprintf(out, "};\n");
emit_padding_stmt(out, table_len * 4);
fprintf(out, "\n");
size += ALIGN16(table_len * 4);
return size;
}
size_t
emit_c_effects(FILE *out, soundfont *sf)
{
size_t size = 0;
if (sf->sfx == NULL)
return size;
fprintf(out, "// EFFECTS\n\n");
// Effects are all contained in the same array. We write empty <Effect/> entries as NULL entries in this array.
fprintf(out, "NO_REORDER SECTION_DATA ALIGNED(16) SoundEffect SF%d_SFX_LIST[] = {\n", sf->info.index);
LL_FOREACH(sfx_data *, sfx, sf->sfx) {
if (sfx->sample != NULL)
fprintf(out, " { { &SF%d_%s_HEADER, " F32_FMT "f } },\n", sf->info.index, sfx->sample->name,
sfx->tuning);
else
fprintf(out, " { { NULL, 0.0f } },\n");
size += 8;
}
fprintf(out, "};\n\n");
return size;
}
void
emit_c_match_padding(FILE *out, soundfont *sf, size_t size)
{
if (sf->match_padding != NULL && sf->match_padding_num != 0) {
// Sometimes a soundfont will have non-zero padding at the end, add these values manually
size_t expected = sf->match_padding_num;
// Don't pad any further than the next 0x10 byte boundary
size_t remaining = ALIGN16(size) - size;
size_t amount = (expected > remaining) ? remaining : expected;
fprintf(out, "// MATCH PADDING\n\n");
fprintf(out, "NO_REORDER SECTION_DATA u8 SF%d_MATCH_PADDING[] = {\n", sf->info.index);
for (size_t i = 0; i < amount; i++)
fprintf(out, " 0x%02X,\n", sf->match_padding[i]);
fprintf(out, "};\n\n");
size += amount;
}
if (sf->info.pad_to_size != 0) {
if (sf->info.pad_to_size <= size) {
warning("PadToSize directive ignored.");
} else {
fprintf(out, "// MATCH SIZE PADDING\n\n");
// pad to given size
size_t amount = sf->info.pad_to_size - size;
fprintf(out, "NO_REORDER SECTION_DATA u8 SF%d_MATCH_PADDING_TO_SIZE[%lu] = { 0 };\n", sf->info.index,
amount);
}
}
}
void
emit_h_instruments(FILE *out, soundfont *sf)
{
if (sf->instruments == NULL)
return;
// Example output:
// #define FONT{Index}_INSTR_{EnumName} {EnumValue}
LL_FOREACH(instr_data *, instr, sf->instruments) {
if (!instr->unused) {
fprintf(out, "#define SF%d_%s %d\n", sf->info.index, instr->name, instr->program_number);
}
}
fprintf(out, "\n");
}
static const char *
z64_note_name(int note_num)
{
static const char *const note_names[] = {
"A0", "BF0", "B0", "C1", "DF1", "D1", "EF1", "E1", "F1", "GF1", "G1", "AF1", "A1", "BF1", "B1",
"C2", "DF2", "D2", "EF2", "E2", "F2", "GF2", "G2", "AF2", "A2", "BF2", "B2", "C3", "DF3", "D3",
"EF3", "E3", "F3", "GF3", "G3", "AF3", "A3", "BF3", "B3", "C4", "DF4", "D4", "EF4", "E4", "F4",
"GF4", "G4", "AF4", "A4", "BF4", "B4", "C5", "DF5", "D5", "EF5", "E5", "F5", "GF5", "G5", "AF5",
"A5", "BF5", "B5", "C6", "DF6", "D6", "EF6", "E6", "F6", "GF6", "G6", "AF6", "A6", "BF6", "B6",
"C7", "DF7", "D7", "EF7", "E7", "F7", "GF7", "G7", "AF7", "A7", "BF7", "B7", "C8", "DF8", "D8",
"EF8", "E8", "F8", "GF8", "G8", "AF8", "A8", "BF8", "B8", "C9", "DF9", "D9", "EF9", "E9", "F9",
"GF9", "G9", "AF9", "A9", "BF9", "B9", "C10", "DF10", "D10", "EF10", "E10", "F10", "BFNEG1", "BNEG1", "C0",
"DF0", "D0", "EF0", "E0", "F0", "GF0", "G0", "AF0",
};
return note_names[note_num];
}
void
emit_h_drums(FILE *out, soundfont *sf)
{
if (sf->drums == NULL)
return;
// Emit drum defines in groups, named like [DrumName]_[NoteName]
// e.g. a drum called "MY_DRUM" with a sample basenote of C4 covering a note range of 0..3 looks like
// #define MY_DRUM_C4 0
// #define MY_DRUM_DF4 1
// #define MY_DRUM_D4 2
// #define MY_DRUM_EF4 3
LL_FOREACH(drum_data *, drum, sf->drums) {
if (drum->name == NULL)
continue;
int length = drum->note_end - drum->note_start + 1;
for (int note_offset = 0; note_offset < length; note_offset++) {
// wrap note on overflow
int note = drum->base_note + note_offset;
if (note > 127)
note -= 128;
fprintf(out, "#define SF%d_%s_%s %d\n", sf->info.index, drum->name, z64_note_name(note),
drum->note_start + note_offset);
}
fprintf(out, "\n");
}
}
void
emit_h_effects(FILE *out, soundfont *sf)
{
if (sf->sfx == NULL)
return;
int i = 0;
LL_FOREACH(sfx_data *, sfx, sf->sfx) {
if (sfx->sample != NULL)
fprintf(out, "#define SF%d_%s %d\n", sf->info.index, sfx->name, i);
i++;
}
fprintf(out, "\n");
}
NORETURN static void
usage(const char *progname)
{
fprintf(stderr, "Usage: %s [--matching] <filename.xml> <out.c> <out.h>\n", progname);
exit(EXIT_FAILURE);
}
int
main(int argc, char **argv)
{
char *filename_in = NULL;
char *filename_out_c = NULL;
char *filename_out_h = NULL;
char *filename_out_name = NULL;
const char *mdfilename = NULL;
FILE *mdfile;
xmlDocPtr document;
soundfont sf;
sf.matching = false;
// parse args
#define arg_error(fmt, ...) \
do { \
fprintf(stderr, fmt "\n", ##__VA_ARGS__); \
usage(argv[0]); \
} while (0)
int argn = 0;
for (int i = 1; i < argc; i++) {
if (argv[i][0] == '-') {
// Optional args
if (strequ(argv[i], "--matching")) {
if (sf.matching)
arg_error("Received --matching option twice");
sf.matching = true;
continue;
}
if (strequ(argv[i], "--makedepend")) {
if (mdfilename != NULL)
arg_error("Received --makedepend option twice");
if (i + 1 == argc)
arg_error("--makedepend missing required argument");
mdfilename = argv[++i];
continue;
}
arg_error("Unknown option \"%s\"", argv[i]);
} else {
// Required args
switch (argn) {
case 0:
filename_in = argv[i];
break;
case 1:
filename_out_c = argv[i];
break;
case 2:
filename_out_h = argv[i];
break;
case 3:
filename_out_name = argv[i];
break;
default:
arg_error("Unknown positional argument \"%s\"", argv[i]);
break;
}
argn++;
}
}
if (argn != 4)
arg_error("Not enough positional arguments");
#undef arg_error
document = xmlReadFile(filename_in, NULL, XML_PARSE_NONET);
if (document == NULL)
return EXIT_FAILURE;
xmlNodePtr root = xmlDocGetRootElement(document);
if (!strequ(XMLSTR_TO_STR(root->name), "Soundfont"))
error("Root node must be <Soundfont>");
read_soundfont_info(&sf, root);
sf.envelopes = sf.envelope_last = NULL;
// read all envelopes first irrespective of their positioning in the xml
LL_FOREACH(xmlNodePtr, node, root->children) {
const char *name = XMLSTR_TO_STR(node->name);
if (strequ(name, "Envelopes"))
read_envelopes_info(&sf, node);
}
// read all samples
sf.samples = NULL;
LL_FOREACH(xmlNodePtr, node, root->children) {
const char *name = XMLSTR_TO_STR(node->name);
if (strequ(name, "Samples"))
read_samples_info(&sf, node);
}
// read all instruments
memset(sf.program_number_bitset, 0, sizeof(sf.program_number_bitset));
sf.instruments = NULL;
sf.drums = NULL;
sf.sfx = NULL;
LL_FOREACH(xmlNodePtr, node, root->children) {
const char *name = XMLSTR_TO_STR(node->name);
if (strequ(name, "Instruments"))
read_instrs_info(&sf, node);
if (strequ(name, "Drums"))
read_drums_info(&sf, node);
if (strequ(name, "Effects"))
read_sfx_info(&sf, node);
}
// read match padding if it exists
sf.match_padding = NULL;
LL_FOREACH(xmlNodePtr, node, root->children) {
const char *name = XMLSTR_TO_STR(node->name);
if (strequ(name, "MatchPadding"))
read_match_padding(&sf, node);
}
// emit C source
FILE *out_c = fopen(filename_out_c, "w");
fprintf(out_c, "#include \"soundfont_file.h\"\n\n");
size_t size = 0;
size += emit_c_header(out_c, &sf);
size += emit_c_samples(out_c, &sf);
size += emit_c_envelopes(out_c, &sf);
size += emit_c_instruments(out_c, &sf);
size += emit_c_drums(out_c, &sf);
size += emit_c_effects(out_c, &sf);
emit_c_match_padding(out_c, &sf, size);
fclose(out_c);
// emit C header
FILE *out_h = fopen(filename_out_h, "w");
fprintf(out_h,
// clang-format off
"#ifndef SOUNDFONT_%d_H_" "\n"
"#define SOUNDFONT_%d_H_" "\n"
"\n",
// clang-format on
sf.info.index, sf.info.index);
fprintf(out_h,
// clang-format off
"#ifdef _LANGUAGE_ASEQ" "\n"
".pushsection .fonts, \"\", @note" "\n"
" .byte %d /*sf id*/" "\n"
".popsection" "\n"
"#endif" "\n"
"\n",
// clang-format on
sf.info.index);
fprintf(out_h,
// clang-format off
"#define %s_ID %d" "\n"
"\n"
"#define SF%d_NUM_INSTRUMENTS %d" "\n"
"#define SF%d_NUM_DRUMS %d" "\n"
"#define SF%d_NUM_SFX %d" "\n"
"\n",
// clang-format on
sf.info.name, sf.info.index, sf.info.index, sf.info.num_instruments, sf.info.index, sf.info.num_drums,
sf.info.index, sf.info.num_effects);
emit_h_instruments(out_h, &sf);
emit_h_drums(out_h, &sf);
emit_h_effects(out_h, &sf);
fprintf(out_h, "#endif\n");
fclose(out_h);
// emit name marker
FILE *out_name = fopen(filename_out_name, "w");
fprintf(out_name, "%s", sf.info.name);
fclose(out_name);
// emit dependency file if wanted
if (mdfilename != NULL) {
mdfile = fopen(mdfilename, "w");
if (mdfile == NULL)
error("Unable to open dependency file [%s] for writing", mdfilename);
// Begin rule + depend on the soundfont xml input
fprintf(mdfile, "%s %s %s: \\\n %s", filename_out_c, filename_out_h, filename_out_name, filename_in);
// Depend on the referenced samplebank xmls
if (sf.info.bank_path != NULL)
fprintf(mdfile, " \\\n %s", sf.info.bank_path);
if (sf.info.bank_path_dd != NULL)
fprintf(mdfile, " \\\n %s", sf.info.bank_path_dd);
// Depend on the aifc files used by this soundfont
LL_FOREACH(sample_data *, sample, sf.samples) {
fprintf(mdfile, " \\\n %s", sample->aifc.path);
}
fputs("\n", mdfile);
fclose(mdfile);
}
// done
xmlFreeDoc(document);
return EXIT_SUCCESS;
}
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