mirror of
https://github.com/halleysfifthinc/AVCLAN-Mockingboard.git
synced 2026-08-11 16:32:52 +00:00
Allen Hill
02b370dd06
Some knock-on changes to keep a simple design:
- Bake the data array into AVCLAN_frame_t
- Bundle the response/reaction with AVCLAN_frame_t
- (Needed to maintain correct/simple ownership semantics with the
cache and outgoing/incoming queues)
- Switch status frame update ticks to use a regular
cache-originating/owned frame
125 lines
3.2 KiB
C
125 lines
3.2 KiB
C
// copyright (C) 2006 Marcin Slonicki <marcin@softservice.com.pl>
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// copyright (C) 2007 Louis Frigon
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// Copyright (C) 2015 Allen Hill <allenofthehills@gmail.com>
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// SPDX-License-Identifier: GPL-3.0-or-later
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#include <stdint.h>
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#include <string.h>
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#include "avclan_phy.h"
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#include "cdchanger.h"
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#include "mediacontrol.h"
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#include "statustimer.h"
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AVCLAN_CD_Status_t cd_status;
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static cd_modes CD_Mode;
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// Sets CD_mode to play and resets timer count (so that the next interrupt is in
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// 1 sec)
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void AVCLAN_startPlaying() {
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static bool havePlayed = false;
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if (havePlayed)
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AVCLAN_mediaFunction(MEDIA_PLAY_PAUSE);
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havePlayed |= true;
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CD_Mode = stPlay;
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statustimer_reset();
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}
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// Sets CD_mode to play and resets timer count (so that the next interrupt is in
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// 1 sec)
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void AVCLAN_stopPlaying() {
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statustimer_disable();
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CD_Mode = stStop;
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AVCLAN_mediaFunction(MEDIA_PLAY_PAUSE);
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}
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/* Pack a 0–99 count into 2-digit BCD. Values >99 (sentinels such as 0xFF /
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0x7F meaning "no time") pass through unchanged so they survive the wire
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round-trip. */
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static uint8_t toBCD(uint8_t x) {
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if (x > 99)
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return x;
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return (uint8_t)(((x / 10) << 4) | (x % 10));
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}
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// Serialize cd_status into the wire format. The struct layout mirrors the wire
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// format byte-for-byte, except for track/mins/secs, which need converted from
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// decimal to BCD
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void serializeCDStatus(uint8_t *dst) {
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memcpy(dst, &cd_status, sizeof(cd_status));
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dst[3] = toBCD(cd_status.track);
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dst[4] = toBCD(cd_status.mins);
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dst[5] = toBCD(cd_status.secs);
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}
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bool AVCLAN_isPlaying() { return (CD_Mode == stPlay); }
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void AVCLAN_incrementTime() {
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// Sentinel values (>99) mean "no time"; leave them alone until setTime()
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// replaces them with a real count.
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if (cd_status.secs > 99)
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return;
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if (cd_status.secs == 59) {
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cd_status.secs = 0;
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if (cd_status.mins == 99)
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cd_status.mins = 0;
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else
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cd_status.mins++;
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} else
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cd_status.secs++;
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}
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void AVCLAN_setTime(uint8_t mins, uint8_t secs) {
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cd_status.mins = mins;
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cd_status.secs = secs;
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}
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// Used for changed status messages
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void AVCLAN_generateStatus(AVCLAN_frame_t *status, bool is_unicast,
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devices to) {
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status->is_unicast = is_unicast;
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status->controller_addr = DEVICE_ADDR;
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status->peripheral_addr = (is_unicast) ? HU_ADDR : 0x1FF;
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status->control = 0xF;
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status->length = sizeof(AVCLAN_CD_Status_t) + ((is_unicast) ? 4 : 3);
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uint8_t *data = status->data;
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if (is_unicast)
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*data++ = 0x00;
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*data++ = dev_CD_CHANGER;
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*data++ = to;
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*data++ = Status_Report;
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serializeCDStatus(data);
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}
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void AVCLAN_normalizeState() {
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// if (cd_status.state != cd_PLAYBACK) {
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if (cd_status.mins > 99)
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cd_status.mins = 0;
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if (cd_status.secs > 99)
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cd_status.secs = 0;
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cd_status.state = cd_PLAYBACK;
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cd_status.flags &= (uint8_t)~(cd_DISK_SCAN | cd_SCAN);
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cd_status.flags2 = 0x80;
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// }
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}
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void AVCLAN_init() {
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AVCLAN_busInit();
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mediacontrol_init();
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statustimer_init();
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cd_status.cds = cd_CD1;
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cd_status.disc = 1;
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cd_status.state = cd_SEEKING | cd_SEEKING_TRACK;
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cd_status.flags = 0;
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cd_status.flags2 = 0xC0;
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cd_status.track = 1;
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cd_status.mins = 0xFF;
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cd_status.secs = 0x7F;
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CD_Mode = stStop;
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}
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