158 lines
4.7 KiB
C++
158 lines
4.7 KiB
C++
/**
|
|
* Furnace Tracker - multi-system chiptune tracker
|
|
* Copyright (C) 2021-2025 tildearrow and contributors
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "fileOpsCommon.h"
|
|
|
|
class DivEngine;
|
|
|
|
//PVI YM2608 ADPCM-B sample bank
|
|
|
|
/* =======================================
|
|
General
|
|
=======================================
|
|
|
|
ADPCM RAM addresses: see docs/common.txt {
|
|
|
|
address_start = 0x0000
|
|
file_header_size = 0x0210
|
|
|
|
}
|
|
|
|
=======================================
|
|
Header
|
|
=======================================
|
|
|
|
0x0000 Identifier (4b)
|
|
"PVI2"
|
|
0x0004 - 0x0007 Unknown Settings (4b)
|
|
Unknown mappings PCME switches <-> Values
|
|
"0x10 0x00 0x10 0x02" in all example files
|
|
First 1h may be Start Address in ADPCM RAM?
|
|
0x0008 - 0x0009 "Delta-N" playback frequency (1h)
|
|
Default 0x49BA "== 16kHz"??
|
|
0x000A Unknown (1b)
|
|
RAM type? (Docs indicate values 0 or 8, all example files have value 0x02?)
|
|
0x000B Amount of defined Samples (1b)
|
|
0x000C - 0x000F Unknown (4b)
|
|
Padding?
|
|
"0x00 0x00 0x00 0x00" in all example files
|
|
0x0010 - 0x020F 128 * {
|
|
|
|
Start of Sample (32b blocks) in ADPCM RAM (1h)
|
|
End of Sample (32b blocks) in ADPCM RAM (1h)
|
|
|
|
(0x0000 0x0000 -> no sample for this instrument ID)
|
|
|
|
}
|
|
|
|
|
|
=======================================
|
|
Body
|
|
=======================================
|
|
|
|
Stream of Sample Data {
|
|
|
|
Yamaha ADPCM-B encoding (4-Bit Signed ADPCM)
|
|
Mono
|
|
Sample rate as specified earlier
|
|
(examples i have seems Stereo or 32kHz despite "16kHz" playback frequency setting?)
|
|
|
|
} */
|
|
|
|
#define PVIV2_FILE_SIG "PVI2"
|
|
#define PVIV1_FILE_SIG "PVI1"
|
|
|
|
#define PVI_BANK_SIZE 128
|
|
#define PVI_SAMPLE_RATE 16000
|
|
|
|
typedef struct
|
|
{
|
|
uint16_t start_pointer;
|
|
uint16_t end_pointer;
|
|
} PVI_HEADER;
|
|
|
|
#define UNUSED(x) (void)(x)
|
|
|
|
#define ADPCM_DATA_START 0x0210
|
|
|
|
void DivEngine::loadPVI(SafeReader& reader, std::vector<DivSample*>& ret, String& stripPath)
|
|
{
|
|
try
|
|
{
|
|
reader.seek(0, SEEK_SET);
|
|
|
|
String file_sig = reader.readString(4);
|
|
if(file_sig != PVIV1_FILE_SIG && file_sig != PVIV2_FILE_SIG) return;
|
|
|
|
unsigned int unknown_settings = (unsigned int)reader.readI();
|
|
UNUSED(unknown_settings);
|
|
unsigned short delta_n = (unsigned short)reader.readS();
|
|
UNUSED(delta_n);
|
|
unsigned char one_byte = (unsigned char)reader.readC();
|
|
UNUSED(one_byte);
|
|
unsigned char amount_of_samples = (unsigned char)reader.readC();
|
|
UNUSED(amount_of_samples);
|
|
unsigned int padding = (unsigned int)reader.readI();
|
|
UNUSED(padding);
|
|
|
|
PVI_HEADER headers[PVI_BANK_SIZE];
|
|
|
|
for(int i = 0; i < PVI_BANK_SIZE; i++)
|
|
{
|
|
headers[i].start_pointer = (unsigned short)reader.readS();
|
|
headers[i].end_pointer = (unsigned short)reader.readS();
|
|
}
|
|
|
|
for(int i = 0; i < PVI_BANK_SIZE; i++)
|
|
{
|
|
if((headers[i].start_pointer != 0 || headers[i].end_pointer != 0) && headers[i].start_pointer < headers[i].end_pointer)
|
|
{
|
|
DivSample* s = new DivSample;
|
|
|
|
s->rate = PVI_SAMPLE_RATE;
|
|
s->centerRate = PVI_SAMPLE_RATE;
|
|
s->depth = DIV_SAMPLE_DEPTH_ADPCM_B;
|
|
s->init((headers[i].end_pointer - headers[i].start_pointer) * 32 * 2);
|
|
|
|
int sample_pos = 0;
|
|
int sample_length = (headers[i].end_pointer - headers[i].start_pointer) * 32;
|
|
|
|
reader.seek(ADPCM_DATA_START + headers[i].start_pointer * 32, SEEK_SET);
|
|
|
|
for(int j = 0; j < sample_length; j++)
|
|
{
|
|
unsigned char curr_byte = (unsigned char)reader.readC();
|
|
//curr_byte=(curr_byte<<4)|(curr_byte>>4);
|
|
|
|
s->dataB[sample_pos] = curr_byte;
|
|
sample_pos++;
|
|
}
|
|
|
|
logI("pvi: start %d end %d len in bytes %d", headers[i].start_pointer, headers[i].end_pointer, (headers[i].end_pointer - headers[i].start_pointer) * 32);
|
|
|
|
ret.push_back(s);
|
|
}
|
|
}
|
|
}
|
|
catch (EndOfFileException& e)
|
|
{
|
|
lastError=_("premature end of file");
|
|
logE("premature end of file");
|
|
}
|
|
} |