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HyperDRM/native/handover.h
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matze19999 c0d891b372 Release 0.13.0
2026-10-06 22:26:27 +02:00

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#ifndef HYPERDRM_HANDOVER_H
#define HYPERDRM_HANDOVER_H
#include "playback.h"
#include "atomic_file.h"
#ifndef CALIBRATION_ACTIVE
#define CALIBRATION_ACTIVE false
#endif
#ifndef PICCAP_BINARY
#define PICCAP_BINARY \
"/media/developer/apps/usr/palm/services/org.webosbrew.piccap.service/hyperion-webos"
#endif
#define HANDOVER_PREF \
"/media/developer/apps/usr/palm/services/org.webosbrew.histogramhyperion.service/" \
"handover.json"
static PlaybackJson playback_json;
static bool handover_enabled, piccap_owned, piccap_busy, media_busy, piccap_connected;
static PlaybackProtection protection;
static uint64_t protection_at, next_media_probe, next_piccap_probe, handover_cooldown,
piccap_action_at;
typedef enum {
SOURCE_HISTOGRAM,
SOURCE_PICCAP_STARTING,
SOURCE_PICCAP,
SOURCE_PICCAP_STOPPING
} CaptureSource;
static CaptureSource capture_source;
static void *service_handle;
static bool (*call_once)(void *, const char *, const char *, Callback, void *, unsigned long *,
LSError *);
static bool (*cancel_call)(void *, unsigned long, LSError *);
static unsigned long piccap_token, media_token;
static uint64_t piccap_deadline, media_deadline;
static unsigned clear_samples, piccap_fallbacks;
static uint64_t clear_since, unknown_since, piccap_disconnected_since;
#define CLEAR_STABLE_MS 2000
#define UNKNOWN_GRACE_MS 1500
#define PICCAP_LOSS_MS 5000
#define PICCAP_FAILURE_COOLDOWN_MS 30000
static TargetConfig piccap_target;
static char piccap_error[128];
static bool piccap_request(int command);
static inline bool piccap_installed(void) {
return access(PICCAP_BINARY, X_OK) == 0;
}
static bool handover_save(bool enabled) {
const char *data = enabled ? "{\"piccapHandover\":true}\n" : "{\"piccapHandover\":false}\n";
return atomic_replace(HANDOVER_PREF, data, strlen(data)) != SAVE_UNCHANGED;
}
static void handover_load(void) {
int fd = open(HANDOVER_PREF, O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
if (fd < 0)
return;
char text[128];
ssize_t n = read(fd, text, sizeof(text) - 1);
close(fd);
if (n > 0) {
text[n] = 0;
void *root = playback_json.parse(text);
handover_enabled = playback_true(&playback_json, root, "piccapHandover");
if (root)
playback_json.put(root);
}
}
static bool media_reply(void *h, void *m, void *ctx) {
(void)h;
(void)ctx;
media_busy = false;
media_token = 0;
protection = playback_classify(&playback_json, payload(m));
protection_at = milliseconds();
if (protection == PLAYBACK_CLEAR) {
if (!clear_samples)
clear_since = protection_at;
if (clear_samples < 3)
clear_samples++;
unknown_since = 0;
} else {
clear_samples = 0;
clear_since = 0;
if (protection == PLAYBACK_UNKNOWN && !unknown_since)
unknown_since = protection_at;
else if (protection == PLAYBACK_PROTECTED)
unknown_since = 0;
}
return true;
}
/* Commands: 0 status, 1 start, 2 stop, 3 getSettings, 4 setSettings. Confirm stopped status before
* VT reuse. */
static bool piccap_reply(void *h, void *m, void *ctx) {
(void)h;
int command = (int)(intptr_t)ctx;
piccap_busy = false;
piccap_token = 0;
void *root = playback_json.parse(payload(m));
bool ok = playback_true(&playback_json, root, "returnValue");
if (command == 0) {
void *running = playback_field(&playback_json, root, "isRunning");
if (ok && running && playback_json.type(running) == 1) {
bool active = playback_json.boolean(running);
piccap_connected = playback_true(&playback_json, root, "connected");
if (active) {
if (capture_source == SOURCE_PICCAP_STARTING)
capture_source = SOURCE_PICCAP;
if (piccap_connected)
piccap_disconnected_since = 0;
else if (!piccap_disconnected_since)
piccap_disconnected_since = milliseconds();
} else if (capture_source != SOURCE_PICCAP_STARTING ||
milliseconds() - piccap_action_at >= 2000) {
if (capture_source != SOURCE_PICCAP_STOPPING)
handover_cooldown = milliseconds() + 10000;
piccap_owned = false;
capture_source = SOURCE_HISTOGRAM;
piccap_connected = false;
piccap_disconnected_since = 0;
if (handover_cooldown < milliseconds() + 3000)
handover_cooldown = milliseconds() + 3000;
if (!retries.paused)
retries.due = milliseconds();
}
} else if (!piccap_installed()) {
piccap_owned = false;
capture_source = SOURCE_HISTOGRAM;
piccap_connected = false;
}
} else if (command == 3 && capture_source == SOURCE_PICCAP_STARTING) {
void *port = playback_field(&playback_json, root, "port"),
*socket = playback_field(&playback_json, root, "unix-socket");
bool same =
ok &&
playback_is(&playback_json, root, "address", target_piccap_host(&piccap_target)) &&
port && playback_json.type(port) == 3 &&
strtoul(playback_json.string(port), NULL, 10) == piccap_target.piccap_port && socket &&
playback_json.type(socket) == 1 && !playback_json.boolean(socket);
if (ok) {
if (!piccap_request(same ? 1 : 4)) {
capture_source = SOURCE_PICCAP_STOPPING;
snprintf(piccap_error, sizeof(piccap_error), "PicCap endpoint request failed");
}
} else {
capture_source = SOURCE_PICCAP_STOPPING;
snprintf(piccap_error, sizeof(piccap_error), "Cannot read PicCap settings");
}
} else if (command == 4) {
if (!ok) {
capture_source = SOURCE_PICCAP_STOPPING;
snprintf(piccap_error, sizeof(piccap_error), "PicCap rejected receiver settings");
}
/* setSettings restarts PicCap itself; status confirms ownership. */
} else if (command == 1 && !ok) {
capture_source = SOURCE_PICCAP_STOPPING;
handover_cooldown = milliseconds() + 10000;
}
if (command >= 3 && capture_source == SOURCE_PICCAP_STOPPING)
handover_cooldown = milliseconds() + 10000;
if (root)
playback_json.put(root);
next_piccap_probe = milliseconds() + 500;
if (command == 2)
piccap_request(0);
return true;
}
static bool piccap_request(int command) {
if (piccap_busy)
return false;
const char *uri = command == 3 ? "luna://org.webosbrew.piccap.service/getSettings"
: command == 4 ? "luna://org.webosbrew.piccap.service/setSettings"
: command == 1 ? "luna://org.webosbrew.piccap.service/start"
: command == 2 ? "luna://org.webosbrew.piccap.service/stop"
: "luna://org.webosbrew.piccap.service/status";
LSError e;
error_init(&e);
char data[160];
snprintf(data, sizeof(data), "{\"address\":\"%s\",\"port\":%u,\"unix-socket\":false}",
target_piccap_host(&piccap_target), piccap_target.piccap_port);
piccap_busy = call_once(service_handle, uri, command == 4 ? data : "{}", piccap_reply,
(void *)(intptr_t)command, &piccap_token, &e);
piccap_deadline = milliseconds() + 3000;
error_free(&e);
if (command)
piccap_action_at = milliseconds();
return piccap_busy;
}
/* Return true while PicCap owns capture or a stop confirmation is pending. */
static bool handover_tick(void) {
uint64_t now = milliseconds();
if (media_busy && now >= media_deadline) {
LSError e;
error_init(&e);
cancel_call(service_handle, media_token, &e);
error_free(&e);
media_busy = false;
media_token = 0;
protection = PLAYBACK_UNKNOWN;
clear_samples = 0;
clear_since = 0;
if (!unknown_since)
unknown_since = now;
}
if (piccap_busy && now >= piccap_deadline) {
snprintf(piccap_error, sizeof(piccap_error), "PicCap request timed out");
LSError e;
error_init(&e);
cancel_call(service_handle, piccap_token, &e);
error_free(&e);
piccap_busy = false;
piccap_token = 0;
capture_source = SOURCE_PICCAP_STOPPING;
next_piccap_probe = 0;
}
if (handover_enabled && piccap_installed() && !retries.paused && playback_json.lib &&
!media_busy && now >= next_media_probe) {
LSError e;
error_init(&e);
media_busy = call_once(service_handle, "luna://com.webos.media/getActivePipelines", "{}",
media_reply, NULL, &media_token, &e);
media_deadline = now + 3000;
error_free(&e);
next_media_probe = now + 1000;
}
if (protection == PLAYBACK_CLEAR && now - protection_at >= 3000) {
protection = PLAYBACK_UNKNOWN;
clear_samples = 0;
clear_since = 0;
if (!unknown_since)
unknown_since = now;
}
bool session = !CALIBRATION_ACTIVE && handover_enabled && target_piccap_compatible(&target) &&
piccap_installed() && !retries.paused && !retries.blocked;
bool clear = session && protection == PLAYBACK_CLEAR && now - protection_at < 3000;
bool stable = clear && clear_samples >= 3 && now - clear_since >= CLEAR_STABLE_MS &&
now >= handover_cooldown;
if (capture_source == SOURCE_HISTOGRAM && stable) {
piccap_target = target;
piccap_error[0] = 0;
piccap_disconnected_since = now;
release_capture(false);
retries.due = 0;
piccap_owned = true;
capture_source = SOURCE_PICCAP_STARTING;
if (!piccap_request(3)) {
capture_source = SOURCE_PICCAP_STOPPING;
handover_cooldown = now + PICCAP_FAILURE_COOLDOWN_MS;
}
}
bool grace = protection == PLAYBACK_UNKNOWN && unknown_since &&
now - unknown_since < UNKNOWN_GRACE_MS && capture_source == SOURCE_PICCAP;
bool lost = piccap_owned && capture_source == SOURCE_PICCAP && piccap_disconnected_since &&
now - piccap_disconnected_since >= PICCAP_LOSS_MS;
if (lost) {
snprintf(piccap_error, sizeof(piccap_error),
"PicCap receiver disconnected; histogram fallback");
piccap_fallbacks++;
handover_cooldown = now + PICCAP_FAILURE_COOLDOWN_MS;
}
if (piccap_owned &&
(!session || (!clear && !grace) || lost || strcmp(piccap_target.host, target.host) ||
piccap_target.piccap_port != target.piccap_port) &&
capture_source != SOURCE_PICCAP_STOPPING) {
capture_source = SOURCE_PICCAP_STOPPING;
next_piccap_probe = 0;
}
if (piccap_owned && !piccap_busy && now >= next_piccap_probe) {
if (capture_source == SOURCE_PICCAP_STOPPING)
piccap_request(2);
else
piccap_request(0);
next_piccap_probe = now + 1000;
}
return piccap_owned;
}
#endif
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