106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-23 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** Burgundy sound codec emulation. */
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#include <core/timermanager.h>
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#include <devices/common/hwcomponent.h>
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#include <devices/deviceregistry.h>
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#include <devices/sound/burgundy.h>
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#include <endianswap.h>
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#include <loguru.hpp>
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BurgundyCodec::BurgundyCodec(std::string name) : MacioSndCodec(name)
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{
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supports_types(HWCompType::SND_CODEC);
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static int burgundy_sample_rates[1] = { 44100 };
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// Burgundy seems to supports only one sample rate
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this->sr_table = burgundy_sample_rates;
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this->max_sr_id = 1;
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this->set_sample_rate(0); // set default sample rate
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}
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uint32_t BurgundyCodec::snd_ctrl_read(uint32_t offset, int size) {
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uint32_t result = 0;
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switch (offset) {
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case AWAC_CODEC_CTRL_REG:
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result = this->last_ctrl_data;
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break;
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case AWAC_CODEC_STATUS_REG:
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result = (this->first_valid << 23) | BURGUNDY_READY |
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(this->byte_counter << 14) | (this->read_pos << 12) |
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(this->data_byte << 4);
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break;
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default:
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LOG_F(ERROR, "%s: read from unsupported register 0x%X", this->name.c_str(),
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offset);
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}
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return BYTESWAP_32(result);
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}
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void BurgundyCodec::snd_ctrl_write(uint32_t offset, uint32_t value, int size) {
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uint8_t reg_addr;
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uint8_t cur_byte;
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//uint8_t last_byte;
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value = BYTESWAP_32(value);
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switch (offset) {
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case AWAC_CODEC_CTRL_REG:
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this->last_ctrl_data = value;
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reg_addr = (value >> 12) & 0xFF;
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cur_byte = (value >> 8) & 3;
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//last_byte = (value >> 10) & 3;
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if (value & BURGUNDY_REG_WR) {
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uint32_t mask = 0xFFU << (cur_byte * 8);
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this->reg_array[reg_addr] = (this->reg_array[reg_addr] & ~mask) |
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((value & 0xFFU) << (cur_byte * 8));
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} else {
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this->reg_addr = reg_addr;
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this->read_pos = cur_byte;
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this->data_byte = (this->reg_array[reg_addr] >> (cur_byte * 8)) & 0xFFU;
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this->first_valid = 1;
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TimerManager::get_instance()->add_oneshot_timer(
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USECS_TO_NSECS(10), // not sure if this is the correct delay
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[this]() {
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this->first_valid = 0;
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this->byte_counter = (this->byte_counter + 1) & 3;
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});
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}
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break;
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default:
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LOG_F(ERROR, "%s: write to unsupported register 0x%X", this->name.c_str(),
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offset);
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}
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}
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static const DeviceDescription Burgundy_Descriptor = {
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BurgundyCodec::create, {}, {}
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};
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REGISTER_DEVICE(BurgundySnd, Burgundy_Descriptor);
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