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mpv/player/client.c
wm4 5e2779b2da client API: copy instead of move old value on async path 
In theory, it's better to keep the old value, because that's more
consistent with the logic of using change timestamps. With the current
code, the old value will probably never be used (instead it will fetch a
new value on every change), so this shouldn't make a difference in
practice.
2019-10-25 15:14:05 +02:00

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/* Copyright (C) 2017 the mpv developers
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <math.h>
#include <assert.h>
#include "common/common.h"
#include "common/global.h"
#include "common/msg.h"
#include "common/msg_control.h"
#include "common/global.h"
#include "input/input.h"
#include "input/cmd.h"
#include "misc/ctype.h"
#include "misc/dispatch.h"
#include "misc/node.h"
#include "misc/rendezvous.h"
#include "misc/thread_tools.h"
#include "options/m_config.h"
#include "options/m_option.h"
#include "options/m_property.h"
#include "options/path.h"
#include "options/parse_configfile.h"
#include "osdep/atomic.h"
#include "osdep/threads.h"
#include "osdep/timer.h"
#include "osdep/io.h"
#include "stream/stream.h"
#include "command.h"
#include "core.h"
#include "client.h"
/*
* Locking hierarchy:
*
* MPContext > mp_client_api.lock > mpv_handle.lock > * > mpv_handle.wakeup_lock
*
* MPContext strictly speaking has no locks, and instead is implicitly managed
* by MPContext.dispatch, which basically stops the playback thread at defined
* points in order to let clients access it in a synchronized manner. Since
* MPContext code accesses the client API, it's on top of the lock hierarchy.
*
*/
struct mp_client_api {
struct MPContext *mpctx;
pthread_mutex_t lock;
atomic_bool uses_vo_libmpv;
// -- protected by lock
struct mpv_handle **clients;
int num_clients;
bool shutting_down; // do not allow new clients
bool have_terminator; // a client took over the role of destroying the core
bool terminate_core_thread; // make libmpv core thread exit
struct mp_custom_protocol *custom_protocols;
int num_custom_protocols;
struct mpv_render_context *render_context;
struct mpv_opengl_cb_context *gl_cb_ctx;
};
struct observe_property {
struct mpv_handle *owner;
char *name;
int id; // ==mp_get_property_id(name)
uint64_t event_mask; // ==mp_get_property_event_mask(name)
int64_t reply_id;
mpv_format format;
const struct m_option *type;
bool changed; // property change should be signaled to user
bool dead; // property unobserved while retrieving value
bool value_valid;
union m_option_value value;
// Only if async. update is used.
uint64_t async_change_ts; // logical timestamp incremented on each change
uint64_t async_value_ts; // logical timestamp for async_value contents
bool async_updating; // if true, updating async_value_ts to change_ts
bool async_value_valid;
union m_option_value async_value;
};
struct mpv_handle {
// -- immmutable
char name[MAX_CLIENT_NAME];
struct mp_log *log;
struct MPContext *mpctx;
struct mp_client_api *clients;
// -- not thread-safe
struct mpv_event *cur_event;
struct mpv_event_property cur_property_event;
pthread_mutex_t lock;
pthread_mutex_t wakeup_lock;
pthread_cond_t wakeup;
// -- protected by wakeup_lock
bool need_wakeup;
void (*wakeup_cb)(void *d);
void *wakeup_cb_ctx;
int wakeup_pipe[2];
// -- protected by lock
uint64_t event_mask;
bool queued_wakeup;
int suspend_count;
mpv_event *events; // ringbuffer of max_events entries
int max_events; // allocated number of entries in events
int first_event; // events[first_event] is the first readable event
int num_events; // number of readable events
int reserved_events; // number of entries reserved for replies
size_t async_counter; // pending other async events
bool choked; // recovering from queue overflow
struct observe_property **properties;
int num_properties;
int lowest_changed; // attempt at making change processing incremental
uint64_t property_event_masks; // or-ed together event masks of all properties
bool fuzzy_initialized; // see scripting.c wait_loaded()
bool is_weak; // can not keep core alive on its own
struct mp_log_buffer *messages;
};
static bool gen_log_message_event(struct mpv_handle *ctx);
static bool gen_property_change_event(struct mpv_handle *ctx, bool *unlocked);
static void notify_property_events(struct mpv_handle *ctx, uint64_t event_mask);
void mp_clients_init(struct MPContext *mpctx)
{
mpctx->clients = talloc_ptrtype(NULL, mpctx->clients);
*mpctx->clients = (struct mp_client_api) {
.mpctx = mpctx,
};
mpctx->global->client_api = mpctx->clients;
pthread_mutex_init(&mpctx->clients->lock, NULL);
}
void mp_clients_destroy(struct MPContext *mpctx)
{
if (!mpctx->clients)
return;
assert(mpctx->clients->num_clients == 0);
TA_FREEP(&mpctx->clients->gl_cb_ctx);
// The API user is supposed to call mpv_render_context_free(). It's simply
// not allowed not to do this.
if (mpctx->clients->render_context) {
MP_FATAL(mpctx, "Broken API use: mpv_render_context_free() not called.\n");
abort();
}
pthread_mutex_destroy(&mpctx->clients->lock);
talloc_free(mpctx->clients);
mpctx->clients = NULL;
}
// Test for "fuzzy" initialization of all clients. That is, all clients have
// at least called mpv_wait_event() at least once since creation (or exited).
bool mp_clients_all_initialized(struct MPContext *mpctx)
{
bool all_ok = true;
pthread_mutex_lock(&mpctx->clients->lock);
for (int n = 0; n < mpctx->clients->num_clients; n++) {
struct mpv_handle *ctx = mpctx->clients->clients[n];
pthread_mutex_lock(&ctx->lock);
all_ok &= ctx->fuzzy_initialized;
pthread_mutex_unlock(&ctx->lock);
}
pthread_mutex_unlock(&mpctx->clients->lock);
return all_ok;
}
static struct mpv_handle *find_client(struct mp_client_api *clients,
const char *name)
{
for (int n = 0; n < clients->num_clients; n++) {
if (strcmp(clients->clients[n]->name, name) == 0)
return clients->clients[n];
}
return NULL;
}
bool mp_client_exists(struct MPContext *mpctx, const char *client_name)
{
pthread_mutex_lock(&mpctx->clients->lock);
bool r = find_client(mpctx->clients, client_name);
pthread_mutex_unlock(&mpctx->clients->lock);
return r;
}
struct mpv_handle *mp_new_client(struct mp_client_api *clients, const char *name)
{
pthread_mutex_lock(&clients->lock);
char nname[MAX_CLIENT_NAME];
for (int n = 1; n < 1000; n++) {
if (!name)
name = "client";
snprintf(nname, sizeof(nname) - 3, "%s", name); // - space for number
for (int i = 0; nname[i]; i++)
nname[i] = mp_isalnum(nname[i]) ? nname[i] : '_';
if (n > 1)
mp_snprintf_cat(nname, sizeof(nname), "%d", n);
if (!find_client(clients, nname))
break;
nname[0] = '\0';
}
if (!nname[0] || clients->shutting_down) {
pthread_mutex_unlock(&clients->lock);
return NULL;
}
int num_events = 1000;
struct mpv_handle *client = talloc_ptrtype(NULL, client);
*client = (struct mpv_handle){
.log = mp_log_new(client, clients->mpctx->log, nname),
.mpctx = clients->mpctx,
.clients = clients,
.cur_event = talloc_zero(client, struct mpv_event),
.events = talloc_array(client, mpv_event, num_events),
.max_events = num_events,
.event_mask = (1ULL << INTERNAL_EVENT_BASE) - 1, // exclude internal events
.wakeup_pipe = {-1, -1},
};
pthread_mutex_init(&client->lock, NULL);
pthread_mutex_init(&client->wakeup_lock, NULL);
pthread_cond_init(&client->wakeup, NULL);
snprintf(client->name, sizeof(client->name), "%s", nname);
MP_TARRAY_APPEND(clients, clients->clients, clients->num_clients, client);
if (clients->num_clients == 1 && !clients->mpctx->is_cli)
client->fuzzy_initialized = true;
pthread_mutex_unlock(&clients->lock);
mpv_request_event(client, MPV_EVENT_TICK, 0);
return client;
}
void mp_client_set_weak(struct mpv_handle *ctx)
{
pthread_mutex_lock(&ctx->lock);
ctx->is_weak = true;
pthread_mutex_unlock(&ctx->lock);
}
const char *mpv_client_name(mpv_handle *ctx)
{
return ctx->name;
}
struct mp_log *mp_client_get_log(struct mpv_handle *ctx)
{
return ctx->log;
}
struct mpv_global *mp_client_get_global(struct mpv_handle *ctx)
{
return ctx->mpctx->global;
}
struct MPContext *mp_client_get_core(struct mpv_handle *ctx)
{
return ctx->mpctx;
}
struct MPContext *mp_client_api_get_core(struct mp_client_api *api)
{
return api->mpctx;
}
static void wakeup_client(struct mpv_handle *ctx)
{
pthread_mutex_lock(&ctx->wakeup_lock);
if (!ctx->need_wakeup) {
ctx->need_wakeup = true;
pthread_cond_broadcast(&ctx->wakeup);
if (ctx->wakeup_cb)
ctx->wakeup_cb(ctx->wakeup_cb_ctx);
if (ctx->wakeup_pipe[0] != -1)
(void)write(ctx->wakeup_pipe[1], &(char){0}, 1);
}
pthread_mutex_unlock(&ctx->wakeup_lock);
}
// Note: the caller has to deal with sporadic wakeups.
static int wait_wakeup(struct mpv_handle *ctx, int64_t end)
{
int r = 0;
pthread_mutex_unlock(&ctx->lock);
pthread_mutex_lock(&ctx->wakeup_lock);
if (!ctx->need_wakeup) {
struct timespec ts = mp_time_us_to_timespec(end);
r = pthread_cond_timedwait(&ctx->wakeup, &ctx->wakeup_lock, &ts);
}
if (r == 0)
ctx->need_wakeup = false;
pthread_mutex_unlock(&ctx->wakeup_lock);
pthread_mutex_lock(&ctx->lock);
return r;
}
void mpv_set_wakeup_callback(mpv_handle *ctx, void (*cb)(void *d), void *d)
{
pthread_mutex_lock(&ctx->wakeup_lock);
ctx->wakeup_cb = cb;
ctx->wakeup_cb_ctx = d;
if (ctx->wakeup_cb)
ctx->wakeup_cb(ctx->wakeup_cb_ctx);
pthread_mutex_unlock(&ctx->wakeup_lock);
}
void mpv_suspend(mpv_handle *ctx)
{
MP_ERR(ctx, "mpv_suspend() is deprecated and does nothing.\n");
}
void mpv_resume(mpv_handle *ctx)
{
}
static void lock_core(mpv_handle *ctx)
{
mp_dispatch_lock(ctx->mpctx->dispatch);
}
static void unlock_core(mpv_handle *ctx)
{
mp_dispatch_unlock(ctx->mpctx->dispatch);
}
void mpv_wait_async_requests(mpv_handle *ctx)
{
pthread_mutex_lock(&ctx->lock);
while (ctx->reserved_events || ctx->async_counter)
wait_wakeup(ctx, INT64_MAX);
pthread_mutex_unlock(&ctx->lock);
}
// Send abort signal to all matching work items.
// If type==0, destroy all of the matching ctx.
// If ctx==0, destroy all.
static void abort_async(struct MPContext *mpctx, mpv_handle *ctx,
int type, uint64_t id)
{
pthread_mutex_lock(&mpctx->abort_lock);
// Destroy all => ensure any newly appearing work is aborted immediately.
if (ctx == NULL)
mpctx->abort_all = true;
for (int n = 0; n < mpctx->num_abort_list; n++) {
struct mp_abort_entry *abort = mpctx->abort_list[n];
if (!ctx || (abort->client == ctx && (!type ||
(abort->client_work_type == type && abort->client_work_id == id))))
{
mp_abort_trigger_locked(mpctx, abort);
}
}
pthread_mutex_unlock(&mpctx->abort_lock);
}
static void get_thread(void *ptr)
{
*(pthread_t *)ptr = pthread_self();
}
static void mp_destroy_client(mpv_handle *ctx, bool terminate)
{
if (!ctx)
return;
struct MPContext *mpctx = ctx->mpctx;
struct mp_client_api *clients = ctx->clients;
MP_VERBOSE(ctx, "Exiting...\n");
if (terminate)
mpv_command(ctx, (const char*[]){"quit", NULL});
abort_async(mpctx, ctx, 0, 0);
// reserved_events equals the number of asynchronous requests that weren't
// yet replied. In order to avoid that trying to reply to a removed client
// causes a crash, block until all asynchronous requests were served.
mpv_wait_async_requests(ctx);
osd_set_external(mpctx->osd, ctx, 0, 0, NULL);
mp_input_remove_sections_by_owner(mpctx->input, ctx->name);
pthread_mutex_lock(&clients->lock);
for (int n = 0; n < clients->num_clients; n++) {
if (clients->clients[n] == ctx) {
MP_TARRAY_REMOVE_AT(clients->clients, clients->num_clients, n);
while (ctx->num_events) {
talloc_free(ctx->events[ctx->first_event].data);
ctx->first_event = (ctx->first_event + 1) % ctx->max_events;
ctx->num_events--;
}
mp_msg_log_buffer_destroy(ctx->messages);
pthread_cond_destroy(&ctx->wakeup);
pthread_mutex_destroy(&ctx->wakeup_lock);
pthread_mutex_destroy(&ctx->lock);
if (ctx->wakeup_pipe[0] != -1) {
close(ctx->wakeup_pipe[0]);
close(ctx->wakeup_pipe[1]);
}
talloc_free(ctx);
ctx = NULL;
break;
}
}
assert(!ctx);
if (mpctx->is_cli) {
terminate = false;
} else {
// If the last strong mpv_handle got destroyed, destroy the core.
bool has_strong_ref = false;
for (int n = 0; n < clients->num_clients; n++)
has_strong_ref |= !clients->clients[n]->is_weak;
if (!has_strong_ref)
terminate = true;
// Reserve the right to destroy mpctx for us.
if (clients->have_terminator)
terminate = false;
clients->have_terminator |= terminate;
}
// mp_shutdown_clients() sleeps to avoid wasting CPU.
// mp_hook_test_completion() also relies on this a bit.
mp_wakeup_core(mpctx);
pthread_mutex_unlock(&clients->lock);
// Note that even if num_clients==0, having set have_terminator keeps mpctx
// and the core thread alive.
if (terminate) {
// Make sure the core stops playing files etc. Being able to lock the
// dispatch queue requires that the core thread is still active.
mp_dispatch_lock(mpctx->dispatch);
mpctx->stop_play = PT_QUIT;
mp_dispatch_unlock(mpctx->dispatch);
pthread_t playthread;
mp_dispatch_run(mpctx->dispatch, get_thread, &playthread);
// Ask the core thread to stop.
pthread_mutex_lock(&clients->lock);
clients->terminate_core_thread = true;
pthread_mutex_unlock(&clients->lock);
mp_wakeup_core(mpctx);
// Blocking wait for all clients and core thread to terminate.
pthread_join(playthread, NULL);
mp_destroy(mpctx);
}
}
void mpv_destroy(mpv_handle *ctx)
{
mp_destroy_client(ctx, false);
}
void mpv_detach_destroy(mpv_handle *ctx)
{
mpv_destroy(ctx);
}
void mpv_terminate_destroy(mpv_handle *ctx)
{
mp_destroy_client(ctx, true);
}
// Can be called on the core thread only. Idempotent.
// Also happens to take care of shutting down any async work.
void mp_shutdown_clients(struct MPContext *mpctx)
{
struct mp_client_api *clients = mpctx->clients;
// Forcefully abort async work after 2 seconds of waiting.
double abort_time = mp_time_sec() + 2;
pthread_mutex_lock(&clients->lock);
// Prevent that new clients can appear.
clients->shutting_down = true;
// Wait until we can terminate.
while (clients->num_clients || mpctx->outstanding_async ||
!(mpctx->is_cli || clients->terminate_core_thread))
{
pthread_mutex_unlock(&clients->lock);
double left = abort_time - mp_time_sec();
if (left >= 0) {
mp_set_timeout(mpctx, left);
} else {
// Forcefully abort any ongoing async work. This is quite rude and
// probably not what everyone wants, so it happens only after a
// timeout.
abort_async(mpctx, NULL, 0, 0);
}
mp_client_broadcast_event(mpctx, MPV_EVENT_SHUTDOWN, NULL);
mp_wait_events(mpctx);
pthread_mutex_lock(&clients->lock);
}
pthread_mutex_unlock(&clients->lock);
}
bool mp_is_shutting_down(struct MPContext *mpctx)
{
struct mp_client_api *clients = mpctx->clients;
pthread_mutex_lock(&clients->lock);
bool res = clients->shutting_down;
pthread_mutex_unlock(&clients->lock);
return res;
}
static void *core_thread(void *p)
{
struct MPContext *mpctx = p;
mpthread_set_name("mpv core");
while (!mpctx->initialized && mpctx->stop_play != PT_QUIT)
mp_idle(mpctx);
if (mpctx->initialized)
mp_play_files(mpctx);
// This actually waits until all clients are gone before actually
// destroying mpctx. Actual destruction is done by whatever destroys
// the last mpv_handle.
mp_shutdown_clients(mpctx);
return NULL;
}
mpv_handle *mpv_create(void)
{
struct MPContext *mpctx = mp_create();
if (!mpctx)
return NULL;
m_config_set_profile(mpctx->mconfig, "libmpv", 0);
mpv_handle *ctx = mp_new_client(mpctx->clients, "main");
if (!ctx) {
mp_destroy(mpctx);
return NULL;
}
pthread_t thread;
if (pthread_create(&thread, NULL, core_thread, mpctx) != 0) {
ctx->clients->have_terminator = true; // avoid blocking
mpv_terminate_destroy(ctx);
mp_destroy(mpctx);
return NULL;
}
return ctx;
}
mpv_handle *mpv_create_client(mpv_handle *ctx, const char *name)
{
if (!ctx)
return mpv_create();
mpv_handle *new = mp_new_client(ctx->mpctx->clients, name);
if (new)
mpv_wait_event(new, 0); // set fuzzy_initialized
return new;
}
mpv_handle *mpv_create_weak_client(mpv_handle *ctx, const char *name)
{
mpv_handle *new = mpv_create_client(ctx, name);
if (new)
mp_client_set_weak(new);
return new;
}
int mpv_initialize(mpv_handle *ctx)
{
lock_core(ctx);
int res = mp_initialize(ctx->mpctx, NULL) ? MPV_ERROR_INVALID_PARAMETER : 0;
mp_wakeup_core(ctx->mpctx);
unlock_core(ctx);
return res;
}
// set ev->data to a new copy of the original data
// (done only for message types that are broadcast)
static void dup_event_data(struct mpv_event *ev)
{
switch (ev->event_id) {
case MPV_EVENT_CLIENT_MESSAGE: {
struct mpv_event_client_message *src = ev->data;
struct mpv_event_client_message *msg =
talloc_zero(NULL, struct mpv_event_client_message);
for (int n = 0; n < src->num_args; n++) {
MP_TARRAY_APPEND(msg, msg->args, msg->num_args,
talloc_strdup(msg, src->args[n]));
}
ev->data = msg;
break;
}
case MPV_EVENT_END_FILE:
ev->data = talloc_memdup(NULL, ev->data, sizeof(mpv_event_end_file));
break;
default:
// Doesn't use events with memory allocation.
if (ev->data)
abort();
}
}
// Reserve an entry in the ring buffer. This can be used to guarantee that the
// reply can be made, even if the buffer becomes congested _after_ sending
// the request.
// Returns an error code if the buffer is full.
static int reserve_reply(struct mpv_handle *ctx)
{
int res = MPV_ERROR_EVENT_QUEUE_FULL;
pthread_mutex_lock(&ctx->lock);
if (ctx->reserved_events + ctx->num_events < ctx->max_events && !ctx->choked)
{
ctx->reserved_events++;
res = 0;
}
pthread_mutex_unlock(&ctx->lock);
return res;
}
static int append_event(struct mpv_handle *ctx, struct mpv_event event, bool copy)
{
if (ctx->num_events + ctx->reserved_events >= ctx->max_events)
return -1;
if (copy)
dup_event_data(&event);
ctx->events[(ctx->first_event + ctx->num_events) % ctx->max_events] = event;
ctx->num_events++;
wakeup_client(ctx);
if (event.event_id == MPV_EVENT_SHUTDOWN)
ctx->event_mask &= ctx->event_mask & ~(1ULL << MPV_EVENT_SHUTDOWN);
return 0;
}
static int send_event(struct mpv_handle *ctx, struct mpv_event *event, bool copy)
{
pthread_mutex_lock(&ctx->lock);
uint64_t mask = 1ULL << event->event_id;
if (ctx->property_event_masks & mask)
notify_property_events(ctx, mask);
int r;
if (!(ctx->event_mask & mask)) {
r = 0;
} else if (ctx->choked) {
r = -1;
} else {
r = append_event(ctx, *event, copy);
if (r < 0) {
MP_ERR(ctx, "Too many events queued.\n");
ctx->choked = true;
}
}
pthread_mutex_unlock(&ctx->lock);
return r;
}
// Send a reply; the reply must have been previously reserved with
// reserve_reply (otherwise, use send_event()).
static void send_reply(struct mpv_handle *ctx, uint64_t userdata,
struct mpv_event *event)
{
event->reply_userdata = userdata;
pthread_mutex_lock(&ctx->lock);
// If this fails, reserve_reply() probably wasn't called.
assert(ctx->reserved_events > 0);
ctx->reserved_events--;
if (append_event(ctx, *event, false) < 0)
abort(); // not reached
pthread_mutex_unlock(&ctx->lock);
}
void mp_client_broadcast_event(struct MPContext *mpctx, int event, void *data)
{
struct mp_client_api *clients = mpctx->clients;
pthread_mutex_lock(&clients->lock);
for (int n = 0; n < clients->num_clients; n++) {
struct mpv_event event_data = {
.event_id = event,
.data = data,
};
send_event(clients->clients[n], &event_data, true);
}
pthread_mutex_unlock(&clients->lock);
}
// If client_name == NULL, then broadcast and free the event.
int mp_client_send_event(struct MPContext *mpctx, const char *client_name,
uint64_t reply_userdata, int event, void *data)
{
if (!client_name) {
mp_client_broadcast_event(mpctx, event, data);
talloc_free(data);
return 0;
}
struct mp_client_api *clients = mpctx->clients;
int r = 0;
struct mpv_event event_data = {
.event_id = event,
.data = data,
.reply_userdata = reply_userdata,
};
pthread_mutex_lock(&clients->lock);
struct mpv_handle *ctx = find_client(clients, client_name);
if (ctx) {
r = send_event(ctx, &event_data, false);
} else {
r = -1;
talloc_free(data);
}
pthread_mutex_unlock(&clients->lock);
return r;
}
int mp_client_send_event_dup(struct MPContext *mpctx, const char *client_name,
int event, void *data)
{
if (!client_name) {
mp_client_broadcast_event(mpctx, event, data);
return 0;
}
struct mpv_event event_data = {
.event_id = event,
.data = data,
};
dup_event_data(&event_data);
return mp_client_send_event(mpctx, client_name, 0, event, event_data.data);
}
int mpv_request_event(mpv_handle *ctx, mpv_event_id event, int enable)
{
if (!mpv_event_name(event) || enable < 0 || enable > 1)
return MPV_ERROR_INVALID_PARAMETER;
if (event == MPV_EVENT_SHUTDOWN && !enable)
return MPV_ERROR_INVALID_PARAMETER;
assert(event < (int)INTERNAL_EVENT_BASE); // excluded above; they have no name
pthread_mutex_lock(&ctx->lock);
uint64_t bit = 1ULL << event;
ctx->event_mask = enable ? ctx->event_mask | bit : ctx->event_mask & ~bit;
pthread_mutex_unlock(&ctx->lock);
return 0;
}
mpv_event *mpv_wait_event(mpv_handle *ctx, double timeout)
{
mpv_event *event = ctx->cur_event;
pthread_mutex_lock(&ctx->lock);
if (!ctx->fuzzy_initialized)
mp_wakeup_core(ctx->clients->mpctx);
ctx->fuzzy_initialized = true;
if (timeout < 0)
timeout = 1e20;
int64_t deadline = mp_add_timeout(mp_time_us(), timeout);
*event = (mpv_event){0};
talloc_free_children(event);
while (1) {
if (ctx->queued_wakeup)
deadline = 0;
// Recover from overflow.
if (ctx->choked && !ctx->num_events) {
ctx->choked = false;
event->event_id = MPV_EVENT_QUEUE_OVERFLOW;
break;
}
// This will almost surely lead to a deadlock. (Polling is still ok.)
if (ctx->suspend_count && timeout > 0) {
MP_ERR(ctx, "attempting to wait while core is suspended");
break;
}
if (ctx->num_events) {
*event = ctx->events[ctx->first_event];
ctx->first_event = (ctx->first_event + 1) % ctx->max_events;
ctx->num_events--;
talloc_steal(event, event->data);
break;
}
bool unlocked = false;
// If there's a changed property, generate change event (never queued).
if (gen_property_change_event(ctx, &unlocked))
break;
// Pop item from message queue, and return as event.
if (gen_log_message_event(ctx))
break;
if (unlocked)
continue;
int r = wait_wakeup(ctx, deadline);
if (r == ETIMEDOUT)
break;
}
ctx->queued_wakeup = false;
pthread_mutex_unlock(&ctx->lock);
return event;
}
void mpv_wakeup(mpv_handle *ctx)
{
pthread_mutex_lock(&ctx->lock);
ctx->queued_wakeup = true;
wakeup_client(ctx);
pthread_mutex_unlock(&ctx->lock);
}
// map client API types to internal types
static const struct m_option type_conv[] = {
[MPV_FORMAT_STRING] = { .type = CONF_TYPE_STRING },
[MPV_FORMAT_FLAG] = { .type = CONF_TYPE_FLAG },
[MPV_FORMAT_INT64] = { .type = CONF_TYPE_INT64 },
[MPV_FORMAT_DOUBLE] = { .type = CONF_TYPE_DOUBLE },
[MPV_FORMAT_NODE] = { .type = CONF_TYPE_NODE },
};
static const struct m_option *get_mp_type(mpv_format format)
{
if ((unsigned)format >= MP_ARRAY_SIZE(type_conv))
return NULL;
if (!type_conv[format].type)
return NULL;
return &type_conv[format];
}
// for read requests - MPV_FORMAT_OSD_STRING special handling
static const struct m_option *get_mp_type_get(mpv_format format)
{
if (format == MPV_FORMAT_OSD_STRING)
format = MPV_FORMAT_STRING; // it's string data, just other semantics
return get_mp_type(format);
}
// move src->dst, and do implicit conversion if possible (conversions to or
// from strings are handled otherwise)
static bool conv_node_to_format(void *dst, mpv_format dst_fmt, mpv_node *src)
{
if (dst_fmt == src->format) {
const struct m_option *type = get_mp_type(dst_fmt);
memcpy(dst, &src->u, type->type->size);
return true;
}
if (dst_fmt == MPV_FORMAT_DOUBLE && src->format == MPV_FORMAT_INT64) {
*(double *)dst = src->u.int64;
return true;
}
if (dst_fmt == MPV_FORMAT_INT64 && src->format == MPV_FORMAT_DOUBLE) {
if (src->u.double_ >= INT64_MIN && src->u.double_ <= INT64_MAX) {
*(int64_t *)dst = src->u.double_;
return true;
}
}
return false;
}
void mpv_free_node_contents(mpv_node *node)
{
static const struct m_option type = { .type = CONF_TYPE_NODE };
m_option_free(&type, node);
}
int mpv_set_option(mpv_handle *ctx, const char *name, mpv_format format,
void *data)
{
int flags = ctx->mpctx->initialized ? M_SETOPT_RUNTIME : 0;
const struct m_option *type = get_mp_type(format);
if (!type)
return MPV_ERROR_OPTION_FORMAT;
struct mpv_node tmp;
if (format != MPV_FORMAT_NODE) {
tmp.format = format;
memcpy(&tmp.u, data, type->type->size);
data = &tmp;
}
lock_core(ctx);
int err = m_config_set_option_node(ctx->mpctx->mconfig, bstr0(name),
data, flags);
unlock_core(ctx);
switch (err) {
case M_OPT_MISSING_PARAM:
case M_OPT_INVALID:
return MPV_ERROR_OPTION_ERROR;
case M_OPT_OUT_OF_RANGE:
return MPV_ERROR_OPTION_FORMAT;
case M_OPT_UNKNOWN:
return MPV_ERROR_OPTION_NOT_FOUND;
default:
if (err >= 0)
return 0;
return MPV_ERROR_OPTION_ERROR;
}
}
int mpv_set_option_string(mpv_handle *ctx, const char *name, const char *data)
{
return mpv_set_option(ctx, name, MPV_FORMAT_STRING, &data);
}
// Run a command in the playback thread.
static void run_locked(mpv_handle *ctx, void (*fn)(void *fn_data), void *fn_data)
{
mp_dispatch_lock(ctx->mpctx->dispatch);
fn(fn_data);
mp_dispatch_unlock(ctx->mpctx->dispatch);
}
// Run a command asynchronously. It's the responsibility of the caller to
// actually send the reply. This helper merely saves a small part of the
// required boilerplate to do so.
// fn: callback to execute the request
// fn_data: opaque caller-defined argument for fn. This will be automatically
// freed with talloc_free(fn_data).
static int run_async(mpv_handle *ctx, void (*fn)(void *fn_data), void *fn_data)
{
int err = reserve_reply(ctx);
if (err < 0) {
talloc_free(fn_data);
return err;
}
mp_dispatch_enqueue(ctx->mpctx->dispatch, fn, fn_data);
return 0;
}
struct cmd_request {
struct MPContext *mpctx;
struct mp_cmd *cmd;
int status;
struct mpv_node *res;
struct mp_waiter completion;
};
static void cmd_complete(struct mp_cmd_ctx *cmd)
{
struct cmd_request *req = cmd->on_completion_priv;
req->status = cmd->success ? 0 : MPV_ERROR_COMMAND;
if (req->res) {
*req->res = cmd->result;
cmd->result = (mpv_node){0};
}
// Unblock the waiting thread (especially for async commands).
mp_waiter_wakeup(&req->completion, 0);
}
static int run_client_command(mpv_handle *ctx, struct mp_cmd *cmd, mpv_node *res)
{
if (!cmd)
return MPV_ERROR_INVALID_PARAMETER;
if (!ctx->mpctx->initialized) {
talloc_free(cmd);
return MPV_ERROR_UNINITIALIZED;
}
cmd->sender = ctx->name;
struct cmd_request req = {
.mpctx = ctx->mpctx,
.cmd = cmd,
.res = res,
.completion = MP_WAITER_INITIALIZER,
};
bool async = cmd->flags & MP_ASYNC_CMD;
lock_core(ctx);
if (async) {
run_command(ctx->mpctx, cmd, NULL, NULL, NULL);
} else {
struct mp_abort_entry *abort = NULL;
if (cmd->def->can_abort) {
abort = talloc_zero(NULL, struct mp_abort_entry);
abort->client = ctx;
}
run_command(ctx->mpctx, cmd, abort, cmd_complete, &req);
}
unlock_core(ctx);
if (!async)
mp_waiter_wait(&req.completion);
return req.status;
}
int mpv_command(mpv_handle *ctx, const char **args)
{
return run_client_command(ctx, mp_input_parse_cmd_strv(ctx->log, args), NULL);
}
int mpv_command_node(mpv_handle *ctx, mpv_node *args, mpv_node *result)
{
struct mpv_node rn = {.format = MPV_FORMAT_NONE};
int r = run_client_command(ctx, mp_input_parse_cmd_node(ctx->log, args), &rn);
if (result && r >= 0)
*result = rn;
return r;
}
int mpv_command_ret(mpv_handle *ctx, const char **args, mpv_node *result)
{
struct mpv_node rn = {.format = MPV_FORMAT_NONE};
int r = run_client_command(ctx, mp_input_parse_cmd_strv(ctx->log, args), &rn);
if (result && r >= 0)
*result = rn;
return r;
}
int mpv_command_string(mpv_handle *ctx, const char *args)
{
return run_client_command(ctx,
mp_input_parse_cmd(ctx->mpctx->input, bstr0((char*)args), ctx->name), NULL);
}
struct async_cmd_request {
struct MPContext *mpctx;
struct mp_cmd *cmd;
struct mpv_handle *reply_ctx;
uint64_t userdata;
};
static void async_cmd_complete(struct mp_cmd_ctx *cmd)
{
struct async_cmd_request *req = cmd->on_completion_priv;
struct mpv_event_command *data = talloc_zero(NULL, struct mpv_event_command);
data->result = cmd->result;
cmd->result = (mpv_node){0};
talloc_steal(data, node_get_alloc(&data->result));
struct mpv_event reply = {
.event_id = MPV_EVENT_COMMAND_REPLY,
.data = data,
.error = cmd->success ? 0 : MPV_ERROR_COMMAND,
};
send_reply(req->reply_ctx, req->userdata, &reply);
talloc_free(req);
}
static void async_cmd_fn(void *data)
{
struct async_cmd_request *req = data;
struct mp_cmd *cmd = req->cmd;
ta_xset_parent(cmd, NULL);
req->cmd = NULL;
struct mp_abort_entry *abort = NULL;
if (cmd->def->can_abort) {
abort = talloc_zero(NULL, struct mp_abort_entry);
abort->client = req->reply_ctx;
abort->client_work_type = MPV_EVENT_COMMAND_REPLY;
abort->client_work_id = req->userdata;
}
// This will synchronously or asynchronously call cmd_complete (depending
// on the command).
run_command(req->mpctx, cmd, abort, async_cmd_complete, req);
}
static int run_async_cmd(mpv_handle *ctx, uint64_t ud, struct mp_cmd *cmd)
{
if (!cmd)
return MPV_ERROR_INVALID_PARAMETER;
if (!ctx->mpctx->initialized) {
talloc_free(cmd);
return MPV_ERROR_UNINITIALIZED;
}
cmd->sender = ctx->name;
struct async_cmd_request *req = talloc_ptrtype(NULL, req);
*req = (struct async_cmd_request){
.mpctx = ctx->mpctx,
.cmd = talloc_steal(req, cmd),
.reply_ctx = ctx,
.userdata = ud,
};
return run_async(ctx, async_cmd_fn, req);
}
int mpv_command_async(mpv_handle *ctx, uint64_t ud, const char **args)
{
return run_async_cmd(ctx, ud, mp_input_parse_cmd_strv(ctx->log, args));
}
int mpv_command_node_async(mpv_handle *ctx, uint64_t ud, mpv_node *args)
{
return run_async_cmd(ctx, ud, mp_input_parse_cmd_node(ctx->log, args));
}
void mpv_abort_async_command(mpv_handle *ctx, uint64_t reply_userdata)
{
abort_async(ctx->mpctx, ctx, MPV_EVENT_COMMAND_REPLY, reply_userdata);
}
static int translate_property_error(int errc)
{
switch (errc) {
case M_PROPERTY_OK: return 0;
case M_PROPERTY_ERROR: return MPV_ERROR_PROPERTY_ERROR;
case M_PROPERTY_UNAVAILABLE: return MPV_ERROR_PROPERTY_UNAVAILABLE;
case M_PROPERTY_NOT_IMPLEMENTED: return MPV_ERROR_PROPERTY_ERROR;
case M_PROPERTY_UNKNOWN: return MPV_ERROR_PROPERTY_NOT_FOUND;
case M_PROPERTY_INVALID_FORMAT: return MPV_ERROR_PROPERTY_FORMAT;
// shouldn't happen
default: return MPV_ERROR_PROPERTY_ERROR;
}
}
struct setproperty_request {
struct MPContext *mpctx;
const char *name;
int format;
void *data;
int status;
struct mpv_handle *reply_ctx;
uint64_t userdata;
};
static void setproperty_fn(void *arg)
{
struct setproperty_request *req = arg;
const struct m_option *type = get_mp_type(req->format);
struct mpv_node *node;
struct mpv_node tmp;
if (req->format == MPV_FORMAT_NODE) {
node = req->data;
} else {
tmp.format = req->format;
memcpy(&tmp.u, req->data, type->type->size);
node = &tmp;
}
int err = mp_property_do(req->name, M_PROPERTY_SET_NODE, node, req->mpctx);
req->status = translate_property_error(err);
if (req->reply_ctx) {
struct mpv_event reply = {
.event_id = MPV_EVENT_SET_PROPERTY_REPLY,
.error = req->status,
};
send_reply(req->reply_ctx, req->userdata, &reply);
talloc_free(req);
}
}
int mpv_set_property(mpv_handle *ctx, const char *name, mpv_format format,
void *data)
{
if (!ctx->mpctx->initialized) {
int r = mpv_set_option(ctx, name, format, data);
if (r == MPV_ERROR_OPTION_NOT_FOUND &&
mp_get_property_id(ctx->mpctx, name) >= 0)
return MPV_ERROR_PROPERTY_UNAVAILABLE;
switch (r) {
case MPV_ERROR_SUCCESS: return MPV_ERROR_SUCCESS;
case MPV_ERROR_OPTION_FORMAT: return MPV_ERROR_PROPERTY_FORMAT;
case MPV_ERROR_OPTION_NOT_FOUND: return MPV_ERROR_PROPERTY_NOT_FOUND;
default: return MPV_ERROR_PROPERTY_ERROR;
}
}
if (!get_mp_type(format))
return MPV_ERROR_PROPERTY_FORMAT;
struct setproperty_request req = {
.mpctx = ctx->mpctx,
.name = name,
.format = format,
.data = data,
};
run_locked(ctx, setproperty_fn, &req);
return req.status;
}
int mpv_set_property_string(mpv_handle *ctx, const char *name, const char *data)
{
return mpv_set_property(ctx, name, MPV_FORMAT_STRING, &data);
}
static void free_prop_set_req(void *ptr)
{
struct setproperty_request *req = ptr;
const struct m_option *type = get_mp_type(req->format);
m_option_free(type, req->data);
}
int mpv_set_property_async(mpv_handle *ctx, uint64_t ud, const char *name,
mpv_format format, void *data)
{
const struct m_option *type = get_mp_type(format);
if (!ctx->mpctx->initialized)
return MPV_ERROR_UNINITIALIZED;
if (!type)
return MPV_ERROR_PROPERTY_FORMAT;
struct setproperty_request *req = talloc_ptrtype(NULL, req);
*req = (struct setproperty_request){
.mpctx = ctx->mpctx,
.name = talloc_strdup(req, name),
.format = format,
.data = talloc_zero_size(req, type->type->size),
.reply_ctx = ctx,
.userdata = ud,
};
m_option_copy(type, req->data, data);
talloc_set_destructor(req, free_prop_set_req);
return run_async(ctx, setproperty_fn, req);
}
struct getproperty_request {
struct MPContext *mpctx;
const char *name;
mpv_format format;
void *data;
int status;
struct mpv_handle *reply_ctx;
uint64_t userdata;
};
static void free_prop_data(void *ptr)
{
struct mpv_event_property *prop = ptr;
const struct m_option *type = get_mp_type_get(prop->format);
m_option_free(type, prop->data);
}
static void getproperty_fn(void *arg)
{
struct getproperty_request *req = arg;
const struct m_option *type = get_mp_type_get(req->format);
union m_option_value xdata = {0};
void *data = req->data ? req->data : &xdata;
int err = -1;
switch (req->format) {
case MPV_FORMAT_OSD_STRING:
err = mp_property_do(req->name, M_PROPERTY_PRINT, data, req->mpctx);
break;
case MPV_FORMAT_STRING: {
char *s = NULL;
err = mp_property_do(req->name, M_PROPERTY_GET_STRING, &s, req->mpctx);
if (err == M_PROPERTY_OK)
*(char **)data = s;
break;
}
case MPV_FORMAT_NODE:
case MPV_FORMAT_FLAG:
case MPV_FORMAT_INT64:
case MPV_FORMAT_DOUBLE: {
struct mpv_node node = {{0}};
err = mp_property_do(req->name, M_PROPERTY_GET_NODE, &node, req->mpctx);
if (err == M_PROPERTY_NOT_IMPLEMENTED) {
// Go through explicit string conversion. Same reasoning as on the
// GET code path.
char *s = NULL;
err = mp_property_do(req->name, M_PROPERTY_GET_STRING, &s,
req->mpctx);
if (err != M_PROPERTY_OK)
break;
node.format = MPV_FORMAT_STRING;
node.u.string = s;
} else if (err <= 0)
break;
if (req->format == MPV_FORMAT_NODE) {
*(struct mpv_node *)data = node;
} else {
if (!conv_node_to_format(data, req->format, &node)) {
err = M_PROPERTY_INVALID_FORMAT;
mpv_free_node_contents(&node);
}
}
break;
}
default:
abort();
}
req->status = translate_property_error(err);
if (req->reply_ctx) {
struct mpv_event_property *prop = talloc_ptrtype(NULL, prop);
*prop = (struct mpv_event_property){
.name = talloc_steal(prop, (char *)req->name),
.format = req->format,
.data = talloc_size(prop, type->type->size),
};
// move data
memcpy(prop->data, &xdata, type->type->size);
talloc_set_destructor(prop, free_prop_data);
struct mpv_event reply = {
.event_id = MPV_EVENT_GET_PROPERTY_REPLY,
.data = prop,
.error = req->status,
};
send_reply(req->reply_ctx, req->userdata, &reply);
talloc_free(req);
}
}
int mpv_get_property(mpv_handle *ctx, const char *name, mpv_format format,
void *data)
{
if (!ctx->mpctx->initialized)
return MPV_ERROR_UNINITIALIZED;
if (!data)
return MPV_ERROR_INVALID_PARAMETER;
if (!get_mp_type_get(format))
return MPV_ERROR_PROPERTY_FORMAT;
struct getproperty_request req = {
.mpctx = ctx->mpctx,
.name = name,
.format = format,
.data = data,
};
run_locked(ctx, getproperty_fn, &req);
return req.status;
}
char *mpv_get_property_string(mpv_handle *ctx, const char *name)
{
char *str = NULL;
mpv_get_property(ctx, name, MPV_FORMAT_STRING, &str);
return str;
}
char *mpv_get_property_osd_string(mpv_handle *ctx, const char *name)
{
char *str = NULL;
mpv_get_property(ctx, name, MPV_FORMAT_OSD_STRING, &str);
return str;
}
int mpv_get_property_async(mpv_handle *ctx, uint64_t ud, const char *name,
mpv_format format)
{
if (!ctx->mpctx->initialized)
return MPV_ERROR_UNINITIALIZED;
if (!get_mp_type_get(format))
return MPV_ERROR_PROPERTY_FORMAT;
struct getproperty_request *req = talloc_ptrtype(NULL, req);
*req = (struct getproperty_request){
.mpctx = ctx->mpctx,
.name = talloc_strdup(req, name),
.format = format,
.reply_ctx = ctx,
.userdata = ud,
};
return run_async(ctx, getproperty_fn, req);
}
static void property_free(void *p)
{
struct observe_property *prop = p;
assert(!prop->async_updating);
if (prop->type) {
m_option_free(prop->type, &prop->value);
m_option_free(prop->type, &prop->async_value);
}
}
int mpv_observe_property(mpv_handle *ctx, uint64_t userdata,
const char *name, mpv_format format)
{
const struct m_option *type = get_mp_type_get(format);
if (format != MPV_FORMAT_NONE && !type)
return MPV_ERROR_PROPERTY_FORMAT;
// Explicitly disallow this, because it would require a special code path.
if (format == MPV_FORMAT_OSD_STRING)
return MPV_ERROR_PROPERTY_FORMAT;
pthread_mutex_lock(&ctx->lock);
struct observe_property *prop = talloc_ptrtype(ctx, prop);
talloc_set_destructor(prop, property_free);
*prop = (struct observe_property){
.owner = ctx,
.name = talloc_strdup(prop, name),
.id = mp_get_property_id(ctx->mpctx, name),
.event_mask = mp_get_property_event_mask(name),
.reply_id = userdata,
.format = format,
.type = type,
.changed = true,
};
MP_TARRAY_APPEND(ctx, ctx->properties, ctx->num_properties, prop);
ctx->property_event_masks |= prop->event_mask;
ctx->lowest_changed = 0;
pthread_mutex_unlock(&ctx->lock);
return 0;
}
static void mark_property_changed(struct mpv_handle *client, int index)
{
struct observe_property *prop = client->properties[index];
prop->changed = true;
prop->async_change_ts += 1;
client->lowest_changed = MPMIN(client->lowest_changed, index);
}
int mpv_unobserve_property(mpv_handle *ctx, uint64_t userdata)
{
pthread_mutex_lock(&ctx->lock);
int count = 0;
for (int n = 0; n < ctx->num_properties; n++) {
struct observe_property *prop = ctx->properties[n];
// Perform actual removal of the property lazily to avoid creating
// dangling pointers and such.
if (prop->reply_id == userdata && !prop->dead) {
mark_property_changed(ctx, n);
prop->dead = true;
count++;
}
}
pthread_mutex_unlock(&ctx->lock);
return count;
}
// Broadcast that a property has changed.
void mp_client_property_change(struct MPContext *mpctx, const char *name)
{
struct mp_client_api *clients = mpctx->clients;
int id = mp_get_property_id(mpctx, name);
pthread_mutex_lock(&clients->lock);
for (int n = 0; n < clients->num_clients; n++) {
struct mpv_handle *client = clients->clients[n];
pthread_mutex_lock(&client->lock);
for (int i = 0; i < client->num_properties; i++) {
if (client->properties[i]->id == id)
mark_property_changed(client, i);
}
if (client->lowest_changed < client->num_properties)
wakeup_client(client);
pthread_mutex_unlock(&client->lock);
}
pthread_mutex_unlock(&clients->lock);
}
// Mark properties as changed in reaction to specific events.
// Called with ctx->lock held.
static void notify_property_events(struct mpv_handle *ctx, uint64_t event_mask)
{
for (int i = 0; i < ctx->num_properties; i++) {
if (ctx->properties[i]->event_mask & event_mask)
mark_property_changed(ctx, i);
}
if (ctx->lowest_changed < ctx->num_properties)
wakeup_client(ctx);
}
static void update_prop_async(void *p)
{
struct observe_property *prop = p;
struct mpv_handle *ctx = prop->owner;
union m_option_value val = {0};
bool val_valid = false;
uint64_t value_ts;
pthread_mutex_lock(&ctx->lock);
value_ts = prop->async_change_ts;
assert(prop->async_updating);
pthread_mutex_unlock(&ctx->lock);
struct getproperty_request req = {
.mpctx = ctx->mpctx,
.name = prop->name,
.format = prop->format,
.data = &val,
};
getproperty_fn(&req);
val_valid = req.status >= 0;
pthread_mutex_lock(&ctx->lock);
assert(prop->async_updating);
// Move to prop->async_value
m_option_free(prop->type, &prop->async_value);
memcpy(&prop->async_value, &val, prop->type->type->size);
prop->async_value_valid = val_valid;
prop->async_value_ts = value_ts;
prop->async_updating = false;
// Cause it to re-check the property.
prop->changed = true;
ctx->lowest_changed = 0;
ctx->async_counter -= 1;
wakeup_client(ctx);
pthread_mutex_unlock(&ctx->lock);
}
static bool update_prop(struct mpv_handle *ctx, struct observe_property *prop)
{
if (!prop->type)
return true;
union m_option_value val = {0};
bool val_valid = false;
// With vo_libmpv, we can't lock the core for stupid reasons.
// Yes, that's FUCKING HORRIBLE. On the other hand, might be useful for
// true async. properties in the future.
if (atomic_load_explicit(&ctx->clients->uses_vo_libmpv, memory_order_relaxed)) {
if (prop->async_change_ts > prop->async_value_ts) {
if (!prop->async_updating) {
prop->async_updating = true;
ctx->async_counter += 1;
mp_dispatch_enqueue(ctx->mpctx->dispatch, update_prop_async, prop);
}
return false; // re-update later when the changed value comes in
}
m_option_copy(prop->type, &val, &prop->async_value);
val_valid = prop->async_value_valid;
} else {
pthread_mutex_unlock(&ctx->lock);
struct getproperty_request req = {
.mpctx = ctx->mpctx,
.name = prop->name,
.format = prop->format,
.data = &val,
};
run_locked(ctx, getproperty_fn, &req);
val_valid = req.status >= 0;
pthread_mutex_lock(&ctx->lock);
}
bool changed = prop->value_valid != val_valid;
if (prop->value_valid && val_valid)
changed = !equal_mpv_value(&prop->value, &val, prop->format);
if (changed) {
prop->value_valid = val_valid;
if (val_valid) {
// move val to prop->value
m_option_free(prop->type, &prop->value);
memcpy(&prop->value, &val, prop->type->type->size);
val_valid = false;
}
}
if (val_valid)
m_option_free(prop->type, &val);
return changed;
}
// Set ctx->cur_event to a generated property change event, if there is any
// outstanding property.
static bool gen_property_change_event(struct mpv_handle *ctx, bool *unlocked)
{
if (!ctx->mpctx->initialized)
return false;
*ctx->cur_event = (struct mpv_event){
.event_id = MPV_EVENT_NONE,
};
bool need_gc = false;
int start = ctx->lowest_changed;
ctx->lowest_changed = ctx->num_properties;
for (int n = start; n < ctx->num_properties; n++) {
struct observe_property *prop = ctx->properties[n];
if (prop->changed && n < ctx->lowest_changed)
ctx->lowest_changed = n;
bool updated = false;
if (prop->changed && !prop->dead) {
prop->changed = false;
updated = update_prop(ctx, prop);
*unlocked = true; // not always; but good enough
}
if (prop->dead) {
need_gc = true;
} else if (updated) {
ctx->cur_property_event = (struct mpv_event_property){
.name = prop->name,
.format = prop->value_valid ? prop->format : 0,
.data = prop->value_valid ? &prop->value : NULL,
};
*ctx->cur_event = (struct mpv_event){
.event_id = MPV_EVENT_PROPERTY_CHANGE,
.reply_userdata = prop->reply_id,
.data = &ctx->cur_property_event,
};
break;
}
}
if (need_gc) {
// Remove entries which have the .dead flag set. The point of doing this
// here is to ensure that this does not conflict with update_prop(),
// and that a previously returned mpv_event struct pointing to removed
// property entries does not result in dangling pointers.
ctx->property_event_masks = 0;
ctx->lowest_changed = 0;
for (int n = ctx->num_properties - 1; n >= 0; n--) {
struct observe_property *prop = ctx->properties[n];
if (prop->dead) {
if (!prop->async_updating) {
MP_TARRAY_REMOVE_AT(ctx->properties, ctx->num_properties, n);
talloc_free(prop);
}
} else {
ctx->property_event_masks |= prop->event_mask;
}
}
}
return !!ctx->cur_event->event_id;
}
int mpv_hook_add(mpv_handle *ctx, uint64_t reply_userdata,
const char *name, int priority)
{
lock_core(ctx);
mp_hook_add(ctx->mpctx, ctx->name, name, reply_userdata, priority, false);
unlock_core(ctx);
return 0;
}
int mpv_hook_continue(mpv_handle *ctx, uint64_t id)
{
lock_core(ctx);
int r = mp_hook_continue(ctx->mpctx, ctx->name, id);
unlock_core(ctx);
return r;
}
int mpv_load_config_file(mpv_handle *ctx, const char *filename)
{
int flags = ctx->mpctx->initialized ? M_SETOPT_RUNTIME : 0;
lock_core(ctx);
int r = m_config_parse_config_file(ctx->mpctx->mconfig, filename, NULL, flags);
unlock_core(ctx);
if (r == 0)
return MPV_ERROR_INVALID_PARAMETER;
if (r < 0)
return MPV_ERROR_OPTION_ERROR;
return 0;
}
static void msg_wakeup(void *p)
{
mpv_handle *ctx = p;
wakeup_client(ctx);
}
int mpv_request_log_messages(mpv_handle *ctx, const char *min_level)
{
int level = -1;
for (int n = 0; n < MSGL_MAX + 1; n++) {
if (mp_log_levels[n] && strcmp(min_level, mp_log_levels[n]) == 0) {
level = n;
break;
}
}
if (strcmp(min_level, "terminal-default") == 0)
level = MP_LOG_BUFFER_MSGL_TERM;
if (level < 0 && strcmp(min_level, "no") != 0)
return MPV_ERROR_INVALID_PARAMETER;
pthread_mutex_lock(&ctx->lock);
mp_msg_log_buffer_destroy(ctx->messages);
ctx->messages = NULL;
if (level >= 0) {
int size = level >= MSGL_V ? 10000 : 1000;
ctx->messages = mp_msg_log_buffer_new(ctx->mpctx->global, size, level,
msg_wakeup, ctx);
}
pthread_mutex_unlock(&ctx->lock);
return 0;
}
// Set ctx->cur_event to a generated log message event, if any available.
static bool gen_log_message_event(struct mpv_handle *ctx)
{
if (ctx->messages) {
struct mp_log_buffer_entry *msg =
mp_msg_log_buffer_read(ctx->messages);
if (msg) {
struct mpv_event_log_message *cmsg =
talloc_ptrtype(ctx->cur_event, cmsg);
talloc_steal(cmsg, msg);
*cmsg = (struct mpv_event_log_message){
.prefix = msg->prefix,
.level = mp_log_levels[msg->level],
.log_level = mp_mpv_log_levels[msg->level],
.text = msg->text,
};
*ctx->cur_event = (struct mpv_event){
.event_id = MPV_EVENT_LOG_MESSAGE,
.data = cmsg,
};
return true;
}
}
return false;
}
int mpv_get_wakeup_pipe(mpv_handle *ctx)
{
pthread_mutex_lock(&ctx->wakeup_lock);
if (ctx->wakeup_pipe[0] == -1) {
if (mp_make_wakeup_pipe(ctx->wakeup_pipe) >= 0)
(void)write(ctx->wakeup_pipe[1], &(char){0}, 1);
}
int fd = ctx->wakeup_pipe[0];
pthread_mutex_unlock(&ctx->wakeup_lock);
return fd;
}
unsigned long mpv_client_api_version(void)
{
return MPV_CLIENT_API_VERSION;
}
static const char *const err_table[] = {
[-MPV_ERROR_SUCCESS] = "success",
[-MPV_ERROR_EVENT_QUEUE_FULL] = "event queue full",
[-MPV_ERROR_NOMEM] = "memory allocation failed",
[-MPV_ERROR_UNINITIALIZED] = "core not uninitialized",
[-MPV_ERROR_INVALID_PARAMETER] = "invalid parameter",
[-MPV_ERROR_OPTION_NOT_FOUND] = "option not found",
[-MPV_ERROR_OPTION_FORMAT] = "unsupported format for accessing option",
[-MPV_ERROR_OPTION_ERROR] = "error setting option",
[-MPV_ERROR_PROPERTY_NOT_FOUND] = "property not found",
[-MPV_ERROR_PROPERTY_FORMAT] = "unsupported format for accessing property",
[-MPV_ERROR_PROPERTY_UNAVAILABLE] = "property unavailable",
[-MPV_ERROR_PROPERTY_ERROR] = "error accessing property",
[-MPV_ERROR_COMMAND] = "error running command",
[-MPV_ERROR_LOADING_FAILED] = "loading failed",
[-MPV_ERROR_AO_INIT_FAILED] = "audio output initialization failed",
[-MPV_ERROR_VO_INIT_FAILED] = "video output initialization failed",
[-MPV_ERROR_NOTHING_TO_PLAY] = "no audio or video data played",
[-MPV_ERROR_UNKNOWN_FORMAT] = "unrecognized file format",
[-MPV_ERROR_UNSUPPORTED] = "not supported",
[-MPV_ERROR_NOT_IMPLEMENTED] = "operation not implemented",
[-MPV_ERROR_GENERIC] = "something happened",
};
const char *mpv_error_string(int error)
{
error = -error;
if (error < 0)
error = 0;
const char *name = NULL;
if (error < MP_ARRAY_SIZE(err_table))
name = err_table[error];
return name ? name : "unknown error";
}
static const char *const event_table[] = {
[MPV_EVENT_NONE] = "none",
[MPV_EVENT_SHUTDOWN] = "shutdown",
[MPV_EVENT_LOG_MESSAGE] = "log-message",
[MPV_EVENT_GET_PROPERTY_REPLY] = "get-property-reply",
[MPV_EVENT_SET_PROPERTY_REPLY] = "set-property-reply",
[MPV_EVENT_COMMAND_REPLY] = "command-reply",
[MPV_EVENT_START_FILE] = "start-file",
[MPV_EVENT_END_FILE] = "end-file",
[MPV_EVENT_FILE_LOADED] = "file-loaded",
[MPV_EVENT_TRACKS_CHANGED] = "tracks-changed",
[MPV_EVENT_TRACK_SWITCHED] = "track-switched",
[MPV_EVENT_IDLE] = "idle",
[MPV_EVENT_PAUSE] = "pause",
[MPV_EVENT_UNPAUSE] = "unpause",
[MPV_EVENT_TICK] = "tick",
[MPV_EVENT_SCRIPT_INPUT_DISPATCH] = "script-input-dispatch",
[MPV_EVENT_CLIENT_MESSAGE] = "client-message",
[MPV_EVENT_VIDEO_RECONFIG] = "video-reconfig",
[MPV_EVENT_AUDIO_RECONFIG] = "audio-reconfig",
[MPV_EVENT_METADATA_UPDATE] = "metadata-update",
[MPV_EVENT_SEEK] = "seek",
[MPV_EVENT_PLAYBACK_RESTART] = "playback-restart",
[MPV_EVENT_PROPERTY_CHANGE] = "property-change",
[MPV_EVENT_CHAPTER_CHANGE] = "chapter-change",
[MPV_EVENT_QUEUE_OVERFLOW] = "event-queue-overflow",
[MPV_EVENT_HOOK] = "hook",
};
const char *mpv_event_name(mpv_event_id event)
{
if ((unsigned)event >= MP_ARRAY_SIZE(event_table))
return NULL;
return event_table[event];
}
void mpv_free(void *data)
{
talloc_free(data);
}
int64_t mpv_get_time_us(mpv_handle *ctx)
{
return mp_time_us();
}
#include "video/out/libmpv.h"
static void do_kill(void *ptr)
{
struct MPContext *mpctx = ptr;
struct track *track = mpctx->vo_chain ? mpctx->vo_chain->track : NULL;
uninit_video_out(mpctx);
if (track) {
mpctx->error_playing = MPV_ERROR_VO_INIT_FAILED;
error_on_track(mpctx, track);
}
}
// Used by vo_libmpv to (a)synchronously uninitialize video.
void kill_video_async(struct mp_client_api *client_api)
{
struct MPContext *mpctx = client_api->mpctx;
mp_dispatch_enqueue(mpctx->dispatch, do_kill, mpctx);
}
// Used by vo_libmpv to set the current render context.
bool mp_set_main_render_context(struct mp_client_api *client_api,
struct mpv_render_context *ctx, bool active)
{
assert(ctx);
pthread_mutex_lock(&client_api->lock);
bool is_set = !!client_api->render_context;
bool is_same = client_api->render_context == ctx;
// Can set if it doesn't remove another existing ctx.
bool res = is_same || !is_set;
if (res)
client_api->render_context = active ? ctx : NULL;
pthread_mutex_unlock(&client_api->lock);
atomic_store(&client_api->uses_vo_libmpv, active);
return res;
}
// Used by vo_libmpv. Relies on guarantees by mp_render_context_acquire().
struct mpv_render_context *
mp_client_api_acquire_render_context(struct mp_client_api *ca)
{
struct mpv_render_context *res = NULL;
pthread_mutex_lock(&ca->lock);
if (ca->render_context && mp_render_context_acquire(ca->render_context))
res = ca->render_context;
pthread_mutex_unlock(&ca->lock);
return res;
}
// Emulation of old opengl_cb API.
#include "libmpv/opengl_cb.h"
#include "libmpv/render_gl.h"
struct mpv_opengl_cb_context {
struct mp_client_api *client_api;
mpv_opengl_cb_update_fn callback;
void *callback_ctx;
};
static mpv_opengl_cb_context *opengl_cb_get_context(mpv_handle *ctx)
{
pthread_mutex_lock(&ctx->clients->lock);
mpv_opengl_cb_context *cb = ctx->clients->gl_cb_ctx;
if (!cb) {
cb = talloc_zero(NULL, struct mpv_opengl_cb_context);
cb->client_api = ctx->clients;
cb->client_api->gl_cb_ctx = cb;
}
pthread_mutex_unlock(&ctx->clients->lock);
return cb;
}
void mpv_opengl_cb_set_update_callback(mpv_opengl_cb_context *ctx,
mpv_opengl_cb_update_fn callback,
void *callback_ctx)
{
// This was probably supposed to be thread-safe, but we don't care. It's
// compatibility code, and if you have problems, use the new API.
if (ctx->client_api->render_context) {
mpv_render_context_set_update_callback(ctx->client_api->render_context,
callback, callback_ctx);
}
// Nasty thing: could set this even while not initialized, so we need to
// preserve it.
ctx->callback = callback;
ctx->callback_ctx = callback_ctx;
}
int mpv_opengl_cb_init_gl(mpv_opengl_cb_context *ctx, const char *exts,
mpv_opengl_cb_get_proc_address_fn get_proc_address,
void *get_proc_address_ctx)
{
if (ctx->client_api->render_context)
return MPV_ERROR_INVALID_PARAMETER;
// mpv_render_context_create() only calls mp_client_get_global() on it.
mpv_handle dummy = {.mpctx = ctx->client_api->mpctx};
mpv_render_param params[] = {
{MPV_RENDER_PARAM_API_TYPE, MPV_RENDER_API_TYPE_OPENGL},
{MPV_RENDER_PARAM_OPENGL_INIT_PARAMS, &(mpv_opengl_init_params){
.get_proc_address = get_proc_address,
.get_proc_address_ctx = get_proc_address_ctx,
.extra_exts = exts,
}},
// Hack for explicit legacy hwdec loading. We really want to make it
// impossible for proper render API users to trigger this.
{(mpv_render_param_type)-1, ctx->client_api->mpctx->global},
{0}
};
int err = mpv_render_context_create(&ctx->client_api->render_context,
&dummy, params);
if (err >= 0) {
mpv_render_context_set_update_callback(ctx->client_api->render_context,
ctx->callback, ctx->callback_ctx);
}
return err;
}
int mpv_opengl_cb_draw(mpv_opengl_cb_context *ctx, int fbo, int w, int h)
{
if (!ctx->client_api->render_context)
return MPV_ERROR_INVALID_PARAMETER;
mpv_render_param params[] = {
{MPV_RENDER_PARAM_OPENGL_FBO, &(mpv_opengl_fbo){
.fbo = fbo,
.w = w,
.h = abs(h),
}},
{MPV_RENDER_PARAM_FLIP_Y, &(int){h < 0}},
{0}
};
return mpv_render_context_render(ctx->client_api->render_context, params);
}
int mpv_opengl_cb_report_flip(mpv_opengl_cb_context *ctx, int64_t time)
{
if (!ctx->client_api->render_context)
return MPV_ERROR_INVALID_PARAMETER;
mpv_render_context_report_swap(ctx->client_api->render_context);
return 0;
}
int mpv_opengl_cb_uninit_gl(mpv_opengl_cb_context *ctx)
{
if (ctx->client_api->render_context)
mpv_render_context_free(ctx->client_api->render_context);
ctx->client_api->render_context = NULL;
return 0;
}
int mpv_opengl_cb_render(mpv_opengl_cb_context *ctx, int fbo, int vp[4])
{
return mpv_opengl_cb_draw(ctx, fbo, vp[2], vp[3]);
}
void *mpv_get_sub_api(mpv_handle *ctx, mpv_sub_api sub_api)
{
if (!ctx->mpctx->initialized)
return NULL;
void *res = NULL;
switch (sub_api) {
case MPV_SUB_API_OPENGL_CB:
res = opengl_cb_get_context(ctx);
break;
default:;
}
return res;
}
// stream_cb
struct mp_custom_protocol {
char *protocol;
void *user_data;
mpv_stream_cb_open_ro_fn open_fn;
};
int mpv_stream_cb_add_ro(mpv_handle *ctx, const char *protocol, void *user_data,
mpv_stream_cb_open_ro_fn open_fn)
{
if (!open_fn)
return MPV_ERROR_INVALID_PARAMETER;
struct mp_client_api *clients = ctx->clients;
int r = 0;
pthread_mutex_lock(&clients->lock);
for (int n = 0; n < clients->num_custom_protocols; n++) {
struct mp_custom_protocol *proto = &clients->custom_protocols[n];
if (strcmp(proto->protocol, protocol) == 0) {
r = MPV_ERROR_INVALID_PARAMETER;
break;
}
}
if (stream_has_proto(protocol))
r = MPV_ERROR_INVALID_PARAMETER;
if (r >= 0) {
struct mp_custom_protocol proto = {
.protocol = talloc_strdup(clients, protocol),
.user_data = user_data,
.open_fn = open_fn,
};
MP_TARRAY_APPEND(clients, clients->custom_protocols,
clients->num_custom_protocols, proto);
}
pthread_mutex_unlock(&clients->lock);
return r;
}
bool mp_streamcb_lookup(struct mpv_global *g, const char *protocol,
void **out_user_data, mpv_stream_cb_open_ro_fn *out_fn)
{
struct mp_client_api *clients = g->client_api;
bool found = false;
pthread_mutex_lock(&clients->lock);
for (int n = 0; n < clients->num_custom_protocols; n++) {
struct mp_custom_protocol *proto = &clients->custom_protocols[n];
if (strcmp(proto->protocol, protocol) == 0) {
*out_user_data = proto->user_data;
*out_fn = proto->open_fn;
found = true;
break;
}
}
pthread_mutex_unlock(&clients->lock);
return found;
}
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