RepoMirrors/mpv
1
0
Fork 0
mirror of https://github.com/mpv-player/mpv synced 2024-12-25 08:12:17 +00:00
Code Issues Releases Wiki Activity
8e41f314f1
mpv/libmpv/client.h
wm4 f30c5d09f4 client API: turn mpv_suspend() and mpv_resume() into stubs 
As threatened by the API changes document.

This commit also removes or stubs equivalent calls in IPC and Lua
scripting.

The stubs are left to maintain ABI compatibility. The semantics of the
API functions have been close enough to doing nothing that this probably
won't even break existing API users. Probably.
2016-11-22 15:54:44 +01:00

1668 lines
68 KiB
C
Raw Blame History

/* 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.
*/
/*
* Note: the client API is licensed under ISC (see above) to ease
* interoperability with other licenses. But keep in mind that the
* mpv core is still mostly GPLv2+. It's up to lawyers to decide
* whether applications using this API are affected by the GPL.
* One argument against this is that proprietary applications
* using mplayer in slave mode is apparently tolerated, and this
* API is basically equivalent to slave mode.
*/
#ifndef MPV_CLIENT_API_H_
#define MPV_CLIENT_API_H_
#include <stddef.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* Mechanisms provided by this API
* -------------------------------
*
* This API provides general control over mpv playback. It does not give you
* direct access to individual components of the player, only the whole thing.
* It's somewhat equivalent to MPlayer's slave mode. You can send commands,
* retrieve or set playback status or settings with properties, and receive
* events.
*
* The API can be used in two ways:
* 1) Internally in mpv, to provide additional features to the command line
* player. Lua scripting uses this. (Currently there is no plugin API to
* get a client API handle in external user code. It has to be a fixed
* part of the player at compilation time.)
* 2) Using mpv as a library with mpv_create(). This basically allows embedding
* mpv in other applications.
*
* Documentation
* -------------
*
* The libmpv C API is documented directly in this header. Note that most
* actual interaction with this player is done through
* options/commands/properties, which can be accessed through this API.
* Essentially everything is done with them, including loading a file,
* retrieving playback progress, and so on.
*
* These are documented elsewhere:
* * http://mpv.io/manual/master/#options
* * http://mpv.io/manual/master/#list-of-input-commands
* * http://mpv.io/manual/master/#properties
*
* You can also look at the examples here:
* * https://github.com/mpv-player/mpv-examples/tree/master/libmpv
*
* Event loop
* ----------
*
* In general, the API user should run an event loop in order to receive events.
* This event loop should call mpv_wait_event(), which will return once a new
* mpv client API is available. It is also possible to integrate client API
* usage in other event loops (e.g. GUI toolkits) with the
* mpv_set_wakeup_callback() function, and then polling for events by calling
* mpv_wait_event() with a 0 timeout.
*
* Note that the event loop is detached from the actual player. Not calling
* mpv_wait_event() will not stop playback. It will eventually congest the
* event queue of your API handle, though.
*
* Synchronous vs. asynchronous calls
* ----------------------------------
*
* The API allows both synchronous and asynchronous calls. Synchronous calls
* have to wait until the playback core is ready, which currently can take
* an unbounded time (e.g. if network is slow or unresponsive). Asynchronous
* calls just queue operations as requests, and return the result of the
* operation as events.
*
* Asynchronous calls
* ------------------
*
* The client API includes asynchronous functions. These allow you to send
* requests instantly, and get replies as events at a later point. The
* requests are made with functions carrying the _async suffix, and replies
* are returned by mpv_wait_event() (interleaved with the normal event stream).
*
* A 64 bit userdata value is used to allow the user to associate requests
* with replies. The value is passed as reply_userdata parameter to the request
* function. The reply to the request will have the reply
* mpv_event->reply_userdata field set to the same value as the
* reply_userdata parameter of the corresponding request.
*
* This userdata value is arbitrary and is never interpreted by the API. Note
* that the userdata value 0 is also allowed, but then the client must be
* careful not accidentally interpret the mpv_event->reply_userdata if an
* event is not a reply. (For non-replies, this field is set to 0.)
*
* Currently, asynchronous calls are always strictly ordered (even with
* synchronous calls) for each client, although that may change in the future.
*
* Multithreading
* --------------
*
* The client API is generally fully thread-safe, unless otherwise noted.
* Currently, there is no real advantage in using more than 1 thread to access
* the client API, since everything is serialized through a single lock in the
* playback core.
*
* Basic environment requirements
* ------------------------------
*
* This documents basic requirements on the C environment. This is especially
* important if mpv is used as library with mpv_create().
*
* - The LC_NUMERIC locale category must be set to "C". If your program calls
* setlocale(), be sure not to use LC_ALL, or if you do, reset LC_NUMERIC
* to its sane default: setlocale(LC_NUMERIC, "C").
* - If a X11 based VO is used, mpv will set the xlib error handler. This error
* handler is process-wide, and there's no proper way to share it with other
* xlib users within the same process. This might confuse GUI toolkits.
* - mpv uses some other libraries that are not library-safe, such as Fribidi
* (used through libass), ALSA, FFmpeg, and possibly more.
* - The FPU precision must be set at least to double precision.
* - On Windows, mpv will call timeBeginPeriod(1).
* - On memory exhaustion, mpv will kill the process.
*
* Encoding of filenames
* ---------------------
*
* mpv uses UTF-8 everywhere.
*
* On some platforms (like Linux), filenames actually do not have to be UTF-8;
* for this reason libmpv supports non-UTF-8 strings. libmpv uses what the
* kernel uses and does not recode filenames. At least on Linux, passing a
* string to libmpv is like passing a string to the fopen() function.
*
* On Windows, filenames are always UTF-8, libmpv converts between UTF-8 and
* UTF-16 when using win32 API functions. libmpv never uses or accepts
* filenames in the local 8 bit encoding. It does not use fopen() either;
* it uses _wfopen().
*
* On OS X, filenames and other strings taken/returned by libmpv can have
* inconsistent unicode normalization. This can sometimes lead to problems.
* You have to hope for the best.
*
* Also see the remarks for MPV_FORMAT_STRING.
*
* Embedding the video window
* --------------------------
*
* Currently you have to get the raw window handle, and set it as "wid" option.
* This works on X11, win32, and OSX only. In addition, it works with a few VOs
* only, and VOs which do not support this will just create a freestanding
* window.
*
* Both on X11 and win32, the player will fill the window referenced by the
* "wid" option fully and letterbox the video (i.e. add black bars if the
* aspect ratio of the window and the video mismatch).
*
* Setting the "input-vo-keyboard" may be required to get keyboard input
* through the embedded window, if this is desired.
*
* For OpenGL integration (e.g. rendering video to a texture), a separate API
* is available. Look at opengl_cb.h. This API does not include keyboard or
* mouse input directly.
*
* Also see client API examples and the mpv manpage.
*
* Compatibility
* -------------
*
* mpv development doesn't stand still, and changes to mpv internals as well as
* to its interface can cause compatibility issues to client API users.
*
* The API is versioned (see MPV_CLIENT_API_VERSION), and changes to it are
* documented in DOCS/client-api-changes.rst. The C API itself will probably
* remain compatible for a long time, but the functionality exposed by it
* could change more rapidly. For example, it's possible that options are
* renamed, or change the set of allowed values.
*
* Defensive programming should be used to potentially deal with the fact that
* options, commands, and properties could disappear, change their value range,
* or change the underlying datatypes. It might be a good idea to prefer
* MPV_FORMAT_STRING over other types to decouple your code from potential
* mpv changes.
*/
/**
* The version is incremented on each API change. The 16 lower bits form the
* minor version number, and the 16 higher bits the major version number. If
* the API becomes incompatible to previous versions, the major version
* number is incremented. This affects only C part, and not properties and
* options.
*
* Every API bump is described in DOCS/client-api-changes.rst
*
* You can use MPV_MAKE_VERSION() and compare the result with integer
* relational operators (<, >, <=, >=).
*/
#define MPV_MAKE_VERSION(major, minor) (((major) << 16) | (minor) | 0UL)
#define MPV_CLIENT_API_VERSION MPV_MAKE_VERSION(1, 24)
/**
* Return the MPV_CLIENT_API_VERSION the mpv source has been compiled with.
*/
unsigned long mpv_client_api_version(void);
/**
* Client context used by the client API. Every client has its own private
* handle.
*/
typedef struct mpv_handle mpv_handle;
/**
* List of error codes than can be returned by API functions. 0 and positive
* return values always mean success, negative values are always errors.
*/
typedef enum mpv_error {
/**
* No error happened (used to signal successful operation).
* Keep in mind that many API functions returning error codes can also
* return positive values, which also indicate success. API users can
* hardcode the fact that ">= 0" means success.
*/
MPV_ERROR_SUCCESS = 0,
/**
* The event ringbuffer is full. This means the client is choked, and can't
* receive any events. This can happen when too many asynchronous requests
* have been made, but not answered. Probably never happens in practice,
* unless the mpv core is frozen for some reason, and the client keeps
* making asynchronous requests. (Bugs in the client API implementation
* could also trigger this, e.g. if events become "lost".)
*/
MPV_ERROR_EVENT_QUEUE_FULL = -1,
/**
* Memory allocation failed.
*/
MPV_ERROR_NOMEM = -2,
/**
* The mpv core wasn't configured and initialized yet. See the notes in
* mpv_create().
*/
MPV_ERROR_UNINITIALIZED = -3,
/**
* Generic catch-all error if a parameter is set to an invalid or
* unsupported value. This is used if there is no better error code.
*/
MPV_ERROR_INVALID_PARAMETER = -4,
/**
* Trying to set an option that doesn't exist.
*/
MPV_ERROR_OPTION_NOT_FOUND = -5,
/**
* Trying to set an option using an unsupported MPV_FORMAT.
*/
MPV_ERROR_OPTION_FORMAT = -6,
/**
* Setting the option failed. Typically this happens if the provided option
* value could not be parsed.
*/
MPV_ERROR_OPTION_ERROR = -7,
/**
* The accessed property doesn't exist.
*/
MPV_ERROR_PROPERTY_NOT_FOUND = -8,
/**
* Trying to set or get a property using an unsupported MPV_FORMAT.
*/
MPV_ERROR_PROPERTY_FORMAT = -9,
/**
* The property exists, but is not available. This usually happens when the
* associated subsystem is not active, e.g. querying audio parameters while
* audio is disabled.
*/
MPV_ERROR_PROPERTY_UNAVAILABLE = -10,
/**
* Error setting or getting a property.
*/
MPV_ERROR_PROPERTY_ERROR = -11,
/**
* General error when running a command with mpv_command and similar.
*/
MPV_ERROR_COMMAND = -12,
/**
* Generic error on loading (usually used with mpv_event_end_file.error).
*/
MPV_ERROR_LOADING_FAILED = -13,
/**
* Initializing the audio output failed.
*/
MPV_ERROR_AO_INIT_FAILED = -14,
/**
* Initializing the video output failed.
*/
MPV_ERROR_VO_INIT_FAILED = -15,
/**
* There was no audio or video data to play. This also happens if the
* file was recognized, but did not contain any audio or video streams,
* or no streams were selected.
*/
MPV_ERROR_NOTHING_TO_PLAY = -16,
/**
* When trying to load the file, the file format could not be determined,
* or the file was too broken to open it.
*/
MPV_ERROR_UNKNOWN_FORMAT = -17,
/**
* Generic error for signaling that certain system requirements are not
* fulfilled.
*/
MPV_ERROR_UNSUPPORTED = -18,
/**
* The API function which was called is a stub only.
*/
MPV_ERROR_NOT_IMPLEMENTED = -19,
/**
* Unspecified error.
*/
MPV_ERROR_GENERIC = -20
} mpv_error;
/**
* Return a string describing the error. For unknown errors, the string
* "unknown error" is returned.
*
* @param error error number, see enum mpv_error
* @return A static string describing the error. The string is completely
* static, i.e. doesn't need to be deallocated, and is valid forever.
*/
const char *mpv_error_string(int error);
/**
* General function to deallocate memory returned by some of the API functions.
* Call this only if it's explicitly documented as allowed. Calling this on
* mpv memory not owned by the caller will lead to undefined behavior.
*
* @param data A valid pointer returned by the API, or NULL.
*/
void mpv_free(void *data);
/**
* Return the name of this client handle. Every client has its own unique
* name, which is mostly used for user interface purposes.
*
* @return The client name. The string is read-only and is valid until the
* mpv_handle is destroyed.
*/
const char *mpv_client_name(mpv_handle *ctx);
/**
* Create a new mpv instance and an associated client API handle to control
* the mpv instance. This instance is in a pre-initialized state,
* and needs to be initialized to be actually used with most other API
* functions.
*
* Some API functions will return MPV_ERROR_UNINITIALIZED in the uninitialized
* state. You can call mpv_set_property() (or mpv_set_property_string() and
* other variants, and before mpv 0.21.0 mpv_set_option() etc.) to set initial
* options. After this, call mpv_initialize() to start the player, and then use
* e.g. mpv_command() to start playback of a file.
*
* The point of separating handle creation and actual initialization is that
* you can configure things which can't be changed during runtime.
*
* Unlike the command line player, this will have initial settings suitable
* for embedding in applications. The following settings are different:
* - stdin/stdout/stderr and the terminal will never be accessed. This is
* equivalent to setting the --no-terminal option.
* (Technically, this also suppresses C signal handling.)
* - No config files will be loaded. This is roughly equivalent to using
* --no-config. Since libmpv 1.15, you can actually re-enable this option,
* which will make libmpv load config files during mpv_initialize(). If you
* do this, you are strongly encouraged to set the "config-dir" option too.
* (Otherwise it will load the mpv command line player's config.)
* - Idle mode is enabled, which means the playback core will enter idle mode
* if there are no more files to play on the internal playlist, instead of
* exiting. This is equivalent to the --idle option.
* - Disable parts of input handling.
* - Most of the different settings can be viewed with the command line player
* by running "mpv --show-profile=libmpv".
*
* All this assumes that API users want a mpv instance that is strictly
* isolated from the command line player's configuration, user settings, and
* so on. You can re-enable disabled features by setting the appropriate
* options.
*
* The mpv command line parser is not available through this API, but you can
* set individual options with mpv_set_property(). Files for playback must be
* loaded with mpv_command() or others.
*
* Note that you should avoid doing concurrent accesses on the uninitialized
* client handle. (Whether concurrent access is definitely allowed or not has
* yet to be decided.)
*
* @return a new mpv client API handle. Returns NULL on error. Currently, this
* can happen in the following situations:
* - out of memory
* - LC_NUMERIC is not set to "C" (see general remarks)
*/
mpv_handle *mpv_create(void);
/**
* Initialize an uninitialized mpv instance. If the mpv instance is already
* running, an error is retuned.
*
* This function needs to be called to make full use of the client API if the
* client API handle was created with mpv_create().
*
* Only the following options require to be set _before_ mpv_initialize():
* - options which are only read at initialization time:
* - config
* - config-dir
* - input-conf
* - load-scripts
* - script
* - player-operation-mode
* - input-app-events (OSX)
* - all encoding mode options
*
* @return error code
*/
int mpv_initialize(mpv_handle *ctx);
/**
* Disconnect and destroy the mpv_handle. ctx will be deallocated with this
* API call. This leaves the player running. If you want to be sure that the
* player is terminated, send a "quit" command, and wait until the
* MPV_EVENT_SHUTDOWN event is received, or use mpv_terminate_destroy().
*/
void mpv_detach_destroy(mpv_handle *ctx);
/**
* Similar to mpv_detach_destroy(), but brings the player and all clients down
* as well, and waits until all of them are destroyed. This function blocks. The
* advantage over mpv_detach_destroy() is that while mpv_detach_destroy() merely
* detaches the client handle from the player, this function quits the player,
* waits until all other clients are destroyed (i.e. all mpv_handles are
* detached), and also waits for the final termination of the player.
*
* Since mpv_detach_destroy() is called somewhere on the way, it's not safe to
* call other functions concurrently on the same context.
*
* If this is called on a mpv_handle that was not created with mpv_create(),
* this function will merely send a quit command and then call
* mpv_detach_destroy(), without waiting for the actual shutdown.
*/
void mpv_terminate_destroy(mpv_handle *ctx);
/**
* Create a new client handle connected to the same player core as ctx. This
* context has its own event queue, its own mpv_request_event() state, its own
* mpv_request_log_messages() state, its own set of observed properties, and
* its own state for asynchronous operations. Otherwise, everything is shared.
*
* This handle should be destroyed with mpv_detach_destroy() if no longer
* needed. The core will live as long as there is at least 1 handle referencing
* it. Any handle can make the core quit, which will result in every handle
* receiving MPV_EVENT_SHUTDOWN.
*
* This function can not be called before the main handle was initialized with
* mpv_initialize(). The new handle is always initialized, unless ctx=NULL was
* passed.
*
* @param ctx Used to get the reference to the mpv core; handle-specific
* settings and parameters are not used.
* If NULL, this function behaves like mpv_create() (ignores name).
* @param name The client name. This will be returned by mpv_client_name(). If
* the name is already in use, or contains non-alphanumeric
* characters (other than '_'), the name is modified to fit.
* If NULL, an arbitrary name is automatically chosen.
* @return a new handle, or NULL on error
*/
mpv_handle *mpv_create_client(mpv_handle *ctx, const char *name);
/**
* Load a config file. This loads and parses the file, and sets every entry in
* the config file's default section as if mpv_set_option_string() is called.
*
* The filename should be an absolute path. If it isn't, the actual path used
* is unspecified. (Note: an absolute path starts with '/' on UNIX.) If the
* file wasn't found, MPV_ERROR_INVALID_PARAMETER is returned.
*
* If a fatal error happens when parsing a config file, MPV_ERROR_OPTION_ERROR
* is returned. Errors when setting options as well as other types or errors
* are ignored (even if options do not exist). You can still try to capture
* the resulting error messages with mpv_request_log_messages(). Note that it's
* possible that some options were successfully set even if any of these errors
* happen.
*
* @param filename absolute path to the config file on the local filesystem
* @return error code
*/
int mpv_load_config_file(mpv_handle *ctx, const char *filename);
/**
* This does nothing since mpv 0.23.0 (API version 1.24). Below is the
* description of the old behavior.
*
* Stop the playback thread. This means the core will stop doing anything, and
* only run and answer to client API requests. This is sometimes useful; for
* example, no new frame will be queued to the video output, so doing requests
* which have to wait on the video output can run instantly.
*
* Suspension is reentrant and recursive for convenience. Any thread can call
* the suspend function multiple times, and the playback thread will remain
* suspended until the last thread resumes it. Note that during suspension, all
* clients still have concurrent access to the core, which is serialized through
* a single mutex.
*
* Call mpv_resume() to resume the playback thread. You must call mpv_resume()
* for each mpv_suspend() call. Calling mpv_resume() more often than
* mpv_suspend() is not allowed.
*
* Calling this on an uninitialized player (see mpv_create()) will deadlock.
*
* @deprecated This function, as well as mpv_resume(), are deprecated, and
* will stop doing anything soon. Their semantics were never
* well-defined, and their usefulness is extremely limited. The
* calls will remain stubs in order to keep ABI compatibility.
*/
void mpv_suspend(mpv_handle *ctx);
/**
* See mpv_suspend().
*/
void mpv_resume(mpv_handle *ctx);
/**
* Return the internal time in microseconds. This has an arbitrary start offset,
* but will never wrap or go backwards.
*
* Note that this is always the real time, and doesn't necessarily have to do
* with playback time. For example, playback could go faster or slower due to
* playback speed, or due to playback being paused. Use the "time-pos" property
* instead to get the playback status.
*
* Unlike other libmpv APIs, this can be called at absolutely any time (even
* within wakeup callbacks), as long as the context is valid.
*/
int64_t mpv_get_time_us(mpv_handle *ctx);
/**
* Data format for options and properties. The API functions to get/set
* properties and options support multiple formats, and this enum describes
* them.
*/
typedef enum mpv_format {
/**
* Invalid. Sometimes used for empty values.
*/
MPV_FORMAT_NONE = 0,
/**
* The basic type is char*. It returns the raw property string, like
* using ${=property} in input.conf (see input.rst).
*
* NULL isn't an allowed value.
*
* Warning: although the encoding is usually UTF-8, this is not always the
* case. File tags often store strings in some legacy codepage,
* and even filenames don't necessarily have to be in UTF-8 (at
* least on Linux). If you pass the strings to code that requires
* valid UTF-8, you have to sanitize it in some way.
* On Windows, filenames are always UTF-8, and libmpv converts
* between UTF-8 and UTF-16 when using win32 API functions. See
* the "Encoding of filenames" section for details.
*
* Example for reading:
*
* char *result = NULL;
* if (mpv_get_property(ctx, "property", MPV_FORMAT_STRING, &result) < 0)
* goto error;
* printf("%s\n", result);
* mpv_free(result);
*
* Or just use mpv_get_property_string().
*
* Example for writing:
*
* char *value = "the new value";
* // yep, you pass the address to the variable
* // (needed for symmetry with other types and mpv_get_property)
* mpv_set_property(ctx, "property", MPV_FORMAT_STRING, &value);
*
* Or just use mpv_set_property_string().
*
*/
MPV_FORMAT_STRING = 1,
/**
* The basic type is char*. It returns the OSD property string, like
* using ${property} in input.conf (see input.rst). In many cases, this
* is the same as the raw string, but in other cases it's formatted for
* display on OSD. It's intended to be human readable. Do not attempt to
* parse these strings.
*
* Only valid when doing read access. The rest works like MPV_FORMAT_STRING.
*/
MPV_FORMAT_OSD_STRING = 2,
/**
* The basic type is int. The only allowed values are 0 ("no")
* and 1 ("yes").
*
* Example for reading:
*
* int result;
* if (mpv_get_property(ctx, "property", MPV_FORMAT_FLAG, &result) < 0)
* goto error;
* printf("%s\n", result ? "true" : "false");
*
* Example for writing:
*
* int flag = 1;
* mpv_set_property(ctx, "property", MPV_FORMAT_FLAG, &flag);
*/
MPV_FORMAT_FLAG = 3,
/**
* The basic type is int64_t.
*/
MPV_FORMAT_INT64 = 4,
/**
* The basic type is double.
*/
MPV_FORMAT_DOUBLE = 5,
/**
* The type is mpv_node.
*
* For reading, you usually would pass a pointer to a stack-allocated
* mpv_node value to mpv, and when you're done you call
* mpv_free_node_contents(&node).
* You're expected not to write to the data - if you have to, copy it
* first (which you have to do manually).
*
* For writing, you construct your own mpv_node, and pass a pointer to the
* API. The API will never write to your data (and copy it if needed), so
* you're free to use any form of allocation or memory management you like.
*
* Warning: when reading, always check the mpv_node.format member. For
* example, properties might change their type in future versions
* of mpv, or sometimes even during runtime.
*
* Example for reading:
*
* mpv_node result;
* if (mpv_get_property(ctx, "property", MPV_FORMAT_NODE, &result) < 0)
* goto error;
* printf("format=%d\n", (int)result.format);
* mpv_free_node_contents(&result).
*
* Example for writing:
*
* mpv_node value;
* value.format = MPV_FORMAT_STRING;
* value.u.string = "hello";
* mpv_set_property(ctx, "property", MPV_FORMAT_NODE, &value);
*/
MPV_FORMAT_NODE = 6,
/**
* Used with mpv_node only. Can usually not be used directly.
*/
MPV_FORMAT_NODE_ARRAY = 7,
/**
* See MPV_FORMAT_NODE_ARRAY.
*/
MPV_FORMAT_NODE_MAP = 8,
/**
* A raw, untyped byte array. Only used only with mpv_node, and only in
* some very special situations. (Currently, only for the screenshot-raw
* command.)
*/
MPV_FORMAT_BYTE_ARRAY = 9
} mpv_format;
/**
* Generic data storage.
*
* If mpv writes this struct (e.g. via mpv_get_property()), you must not change
* the data. In some cases (mpv_get_property()), you have to free it with
* mpv_free_node_contents(). If you fill this struct yourself, you're also
* responsible for freeing it, and you must not call mpv_free_node_contents().
*/
typedef struct mpv_node {
union {
char *string; /** valid if format==MPV_FORMAT_STRING */
int flag; /** valid if format==MPV_FORMAT_FLAG */
int64_t int64; /** valid if format==MPV_FORMAT_INT64 */
double double_; /** valid if format==MPV_FORMAT_DOUBLE */
/**
* valid if format==MPV_FORMAT_NODE_ARRAY
* or if format==MPV_FORMAT_NODE_MAP
*/
struct mpv_node_list *list;
/**
* valid if format==MPV_FORMAT_BYTE_ARRAY
*/
struct mpv_byte_array *ba;
} u;
/**
* Type of the data stored in this struct. This value rules what members in
* the given union can be accessed. The following formats are currently
* defined to be allowed in mpv_node:
*
* MPV_FORMAT_STRING (u.string)
* MPV_FORMAT_FLAG (u.flag)
* MPV_FORMAT_INT64 (u.int64)
* MPV_FORMAT_DOUBLE (u.double_)
* MPV_FORMAT_NODE_ARRAY (u.list)
* MPV_FORMAT_NODE_MAP (u.list)
* MPV_FORMAT_BYTE_ARRAY (u.ba)
* MPV_FORMAT_NONE (no member)
*
* If you encounter a value you don't know, you must not make any
* assumptions about the contents of union u.
*/
mpv_format format;
} mpv_node;
/**
* (see mpv_node)
*/
typedef struct mpv_node_list {
/**
* Number of entries. Negative values are not allowed.
*/
int num;
/**
* MPV_FORMAT_NODE_ARRAY:
* values[N] refers to value of the Nth item
*
* MPV_FORMAT_NODE_MAP:
* values[N] refers to value of the Nth key/value pair
*
* If num > 0, values[0] to values[num-1] (inclusive) are valid.
* Otherwise, this can be NULL.
*/
mpv_node *values;
/**
* MPV_FORMAT_NODE_ARRAY:
* unused (typically NULL), access is not allowed
*
* MPV_FORMAT_NODE_MAP:
* keys[N] refers to key of the Nth key/value pair. If num > 0, keys[0] to
* keys[num-1] (inclusive) are valid. Otherwise, this can be NULL.
* The keys are in random order. The only guarantee is that keys[N] belongs
* to the value values[N]. NULL keys are not allowed.
*/
char **keys;
} mpv_node_list;
/**
* (see mpv_node)
*/
typedef struct mpv_byte_array {
/**
* Pointer to the data. In what format the data is stored is up to whatever
* uses MPV_FORMAT_BYTE_ARRAY.
*/
void *data;
/**
* Size of the data pointed to by ptr.
*/
size_t size;
} mpv_byte_array;
/**
* Frees any data referenced by the node. It doesn't free the node itself.
* Call this only if the mpv client API set the node. If you constructed the
* node yourself (manually), you have to free it yourself.
*
* If node->format is MPV_FORMAT_NONE, this call does nothing. Likewise, if
* the client API sets a node with this format, this function doesn't need to
* be called. (This is just a clarification that there's no danger of anything
* strange happening in these cases.)
*/
void mpv_free_node_contents(mpv_node *node);
/**
* Set an option. Note that you can't normally set options during runtime. It
* works in uninitialized state (see mpv_create()), and in some cases in at
* runtime.
*
* Using a format other than MPV_FORMAT_NODE is equivalent to constructing a
* mpv_node with the given format and data, and passing the mpv_node to this
* function.
*
* Note: this is semi-deprecated. For most purposes, this is not needed anymore.
* Starting with mpv version 0.21.0 (version 1.23) most options can be set
* with mpv_set_property() (and related functions), and even before
* mpv_initialize(). In some obscure corner cases, using this function
* to set options might still be required (see below, and also section
* "Inconsistencies between options and properties" on the manpage). Once
* these are resolved, the option setting functions might be fully
* deprecated.
*
* The following options still need to be set either _before_
* mpv_initialize() with mpv_set_property() (or related functions), or
* with mpv_set_option() (or related functions) at any time:
* - options shadowed by deprecated properties:
* - demuxer (property deprecated in 0.21.0)
* - idle (property deprecated in 0.21.0)
* - fps (property deprecated in 0.21.0)
* - cache (property deprecated in 0.21.0)
* - length (property deprecated in 0.10.0)
* - audio-samplerate (property deprecated in 0.10.0)
* - audio-channels (property deprecated in 0.10.0)
* - audio-format (property deprecated in 0.10.0)
* - deprecated options shadowed by properties:
* - chapter (option deprecated in 0.21.0)
* - playlist-pos (option deprecated in 0.21.0)
* The deprecated properties will be removed in mpv 0.23.0.
*
* @param name Option name. This is the same as on the mpv command line, but
* without the leading "--".
* @param format see enum mpv_format.
* @param[in] data Option value (according to the format).
* @return error code
*/
int mpv_set_option(mpv_handle *ctx, const char *name, mpv_format format,
void *data);
/**
* Convenience function to set an option to a string value. This is like
* calling mpv_set_option() with MPV_FORMAT_STRING.
*
* @return error code
*/
int mpv_set_option_string(mpv_handle *ctx, const char *name, const char *data);
/**
* Send a command to the player. Commands are the same as those used in
* input.conf, except that this function takes parameters in a pre-split
* form.
*
* The commands and their parameters are documented in input.rst.
*
* @param[in] args NULL-terminated list of strings. Usually, the first item
* is the command, and the following items are arguments.
* @return error code
*/
int mpv_command(mpv_handle *ctx, const char **args);
/**
* Same as mpv_command(), but allows passing structured data in any format.
* In particular, calling mpv_command() is exactly like calling
* mpv_command_node() with the format set to MPV_FORMAT_NODE_ARRAY, and
* every arg passed in order as MPV_FORMAT_STRING.
*
* @param[in] args mpv_node with format set to MPV_FORMAT_NODE_ARRAY; each entry
* is an argument using an arbitrary format (the format must be
* compatible to the used command). Usually, the first item is
* the command name (as MPV_FORMAT_STRING).
* @param[out] result Optional, pass NULL if unused. If not NULL, and if the
* function succeeds, this is set to command-specific return
* data. You must call mpv_free_node_contents() to free it
* (again, only if the command actually succeeds).
* Currently, no command uses this, but that can change in
* the future.
* @return error code (the result parameter is not set on error)
*/
int mpv_command_node(mpv_handle *ctx, mpv_node *args, mpv_node *result);
/**
* Same as mpv_command, but use input.conf parsing for splitting arguments.
* This is slightly simpler, but also more error prone, since arguments may
* need quoting/escaping.
*/
int mpv_command_string(mpv_handle *ctx, const char *args);
/**
* Same as mpv_command, but run the command asynchronously.
*
* Commands are executed asynchronously. You will receive a
* MPV_EVENT_COMMAND_REPLY event. (This event will also have an
* error code set if running the command failed.)
*
* @param reply_userdata the value mpv_event.reply_userdata of the reply will
* be set to (see section about asynchronous calls)
* @param args NULL-terminated list of strings (see mpv_command())
* @return error code (if parsing or queuing the command fails)
*/
int mpv_command_async(mpv_handle *ctx, uint64_t reply_userdata,
const char **args);
/**
* Same as mpv_command_node(), but run it asynchronously. Basically, this
* function is to mpv_command_node() what mpv_command_async() is to
* mpv_command().
*
* See mpv_command_async() for details. Retrieving the result is not
* supported yet.
*
* @param reply_userdata the value mpv_event.reply_userdata of the reply will
* be set to (see section about asynchronous calls)
* @param args as in mpv_command_node()
* @return error code (if parsing or queuing the command fails)
*/
int mpv_command_node_async(mpv_handle *ctx, uint64_t reply_userdata,
mpv_node *args);
/**
* Set a property to a given value. Properties are essentially variables which
* can be queried or set at runtime. For example, writing to the pause property
* will actually pause or unpause playback.
*
* If the format doesn't match with the internal format of the property, access
* usually will fail with MPV_ERROR_PROPERTY_FORMAT. In some cases, the data
* is automatically converted and access succeeds. For example, MPV_FORMAT_INT64
* is always converted to MPV_FORMAT_DOUBLE, and access using MPV_FORMAT_STRING
* usually invokes a string parser. The same happens when calling this function
* with MPV_FORMAT_NODE: the underlying format may be converted to another
* type if possible.
*
* Using a format other than MPV_FORMAT_NODE is equivalent to constructing a
* mpv_node with the given format and data, and passing the mpv_node to this
* function. (Before API version 1.21, this was different.)
*
* Note: starting with mpv 0.21.0 (client API version 1.23), this can be used to
* set options in general. It even can be used before mpv_initialize()
* has been called. If called before mpv_initialize(), setting properties
* not backed by options will result in MPV_ERROR_PROPERTY_UNAVAILABLE.
* In some cases, properties and options still conflict. In these cases,
* mpv_set_property() accesses the options before mpv_initialize(), and
* the properties after mpv_initialize(). These conflicts will be removed
* in mpv 0.23.0. See mpv_set_option() for further remarks.
*
* @param name The property name. See input.rst for a list of properties.
* @param format see enum mpv_format.
* @param[in] data Option value.
* @return error code
*/
int mpv_set_property(mpv_handle *ctx, const char *name, mpv_format format,
void *data);
/**
* Convenience function to set a property to a string value.
*
* This is like calling mpv_set_property() with MPV_FORMAT_STRING.
*/
int mpv_set_property_string(mpv_handle *ctx, const char *name, const char *data);
/**
* Set a property asynchronously. You will receive the result of the operation
* as MPV_EVENT_SET_PROPERTY_REPLY event. The mpv_event.error field will contain
* the result status of the operation. Otherwise, this function is similar to
* mpv_set_property().
*
* @param reply_userdata see section about asynchronous calls
* @param name The property name.
* @param format see enum mpv_format.
* @param[in] data Option value. The value will be copied by the function. It
* will never be modified by the client API.
* @return error code if sending the request failed
*/
int mpv_set_property_async(mpv_handle *ctx, uint64_t reply_userdata,
const char *name, mpv_format format, void *data);
/**
* Read the value of the given property.
*
* If the format doesn't match with the internal format of the property, access
* usually will fail with MPV_ERROR_PROPERTY_FORMAT. In some cases, the data
* is automatically converted and access succeeds. For example, MPV_FORMAT_INT64
* is always converted to MPV_FORMAT_DOUBLE, and access using MPV_FORMAT_STRING
* usually invokes a string formatter.
*
* @param name The property name.
* @param format see enum mpv_format.
* @param[out] data Pointer to the variable holding the option value. On
* success, the variable will be set to a copy of the option
* value. For formats that require dynamic memory allocation,
* you can free the value with mpv_free() (strings) or
* mpv_free_node_contents() (MPV_FORMAT_NODE).
* @return error code
*/
int mpv_get_property(mpv_handle *ctx, const char *name, mpv_format format,
void *data);
/**
* Return the value of the property with the given name as string. This is
* equivalent to mpv_get_property() with MPV_FORMAT_STRING.
*
* See MPV_FORMAT_STRING for character encoding issues.
*
* On error, NULL is returned. Use mpv_get_property() if you want fine-grained
* error reporting.
*
* @param name The property name.
* @return Property value, or NULL if the property can't be retrieved. Free
* the string with mpv_free().
*/
char *mpv_get_property_string(mpv_handle *ctx, const char *name);
/**
* Return the property as "OSD" formatted string. This is the same as
* mpv_get_property_string, but using MPV_FORMAT_OSD_STRING.
*
* @return Property value, or NULL if the property can't be retrieved. Free
* the string with mpv_free().
*/
char *mpv_get_property_osd_string(mpv_handle *ctx, const char *name);
/**
* Get a property asynchronously. You will receive the result of the operation
* as well as the property data with the MPV_EVENT_GET_PROPERTY_REPLY event.
* You should check the mpv_event.error field on the reply event.
*
* @param reply_userdata see section about asynchronous calls
* @param name The property name.
* @param format see enum mpv_format.
* @return error code if sending the request failed
*/
int mpv_get_property_async(mpv_handle *ctx, uint64_t reply_userdata,
const char *name, mpv_format format);
/**
* Get a notification whenever the given property changes. You will receive
* updates as MPV_EVENT_PROPERTY_CHANGE. Note that this is not very precise:
* for some properties, it may not send updates even if the property changed.
* This depends on the property, and it's a valid feature request to ask for
* better update handling of a specific property. (For some properties, like
* ``clock``, which shows the wall clock, this mechanism doesn't make too
* much sense anyway.)
*
* Property changes are coalesced: the change events are returned only once the
* event queue becomes empty (e.g. mpv_wait_event() would block or return
* MPV_EVENT_NONE), and then only one event per changed property is returned.
*
* Normally, change events are sent only if the property value changes according
* to the requested format. mpv_event_property will contain the property value
* as data member.
*
* Warning: if a property is unavailable or retrieving it caused an error,
* MPV_FORMAT_NONE will be set in mpv_event_property, even if the
* format parameter was set to a different value. In this case, the
* mpv_event_property.data field is invalid.
*
* If the property is observed with the format parameter set to MPV_FORMAT_NONE,
* you get low-level notifications whether the property _may_ have changed, and
* the data member in mpv_event_property will be unset. With this mode, you
* will have to determine yourself whether the property really changd. On the
* other hand, this mechanism can be faster and uses less resources.
*
* Observing a property that doesn't exist is allowed. (Although it may still
* cause some sporadic change events.)
*
* Keep in mind that you will get change notifications even if you change a
* property yourself. Try to avoid endless feedback loops, which could happen
* if you react to the change notifications triggered by your own change.
*
* @param reply_userdata This will be used for the mpv_event.reply_userdata
* field for the received MPV_EVENT_PROPERTY_CHANGE
* events. (Also see section about asynchronous calls,
* although this function is somewhat different from
* actual asynchronous calls.)
* If you have no use for this, pass 0.
* Also see mpv_unobserve_property().
* @param name The property name.
* @param format see enum mpv_format. Can be MPV_FORMAT_NONE to omit values
* from the change events.
* @return error code (usually fails only on OOM or unsupported format)
*/
int mpv_observe_property(mpv_handle *mpv, uint64_t reply_userdata,
const char *name, mpv_format format);
/**
* Undo mpv_observe_property(). This will remove all observed properties for
* which the given number was passed as reply_userdata to mpv_observe_property.
*
* @param registered_reply_userdata ID that was passed to mpv_observe_property
* @return negative value is an error code, >=0 is number of removed properties
* on success (includes the case when 0 were removed)
*/
int mpv_unobserve_property(mpv_handle *mpv, uint64_t registered_reply_userdata);
typedef enum mpv_event_id {
/**
* Nothing happened. Happens on timeouts or sporadic wakeups.
*/
MPV_EVENT_NONE = 0,
/**
* Happens when the player quits. The player enters a state where it tries
* to disconnect all clients. Most requests to the player will fail, and
* mpv_wait_event() will always return instantly (returning new shutdown
* events if no other events are queued). The client should react to this
* and quit with mpv_detach_destroy() as soon as possible.
*/
MPV_EVENT_SHUTDOWN = 1,
/**
* See mpv_request_log_messages().
*/
MPV_EVENT_LOG_MESSAGE = 2,
/**
* Reply to a mpv_get_property_async() request.
* See also mpv_event and mpv_event_property.
*/
MPV_EVENT_GET_PROPERTY_REPLY = 3,
/**
* Reply to a mpv_set_property_async() request.
* (Unlike MPV_EVENT_GET_PROPERTY, mpv_event_property is not used.)
*/
MPV_EVENT_SET_PROPERTY_REPLY = 4,
/**
* Reply to a mpv_command_async() request.
*/
MPV_EVENT_COMMAND_REPLY = 5,
/**
* Notification before playback start of a file (before the file is loaded).
*/
MPV_EVENT_START_FILE = 6,
/**
* Notification after playback end (after the file was unloaded).
* See also mpv_event and mpv_event_end_file.
*/
MPV_EVENT_END_FILE = 7,
/**
* Notification when the file has been loaded (headers were read etc.), and
* decoding starts.
*/
MPV_EVENT_FILE_LOADED = 8,
/**
* The list of video/audio/subtitle tracks was changed. (E.g. a new track
* was found. This doesn't necessarily indicate a track switch; for this,
* MPV_EVENT_TRACK_SWITCHED is used.)
*
* @deprecated This is equivalent to using mpv_observe_property() on the
* "track-list" property. The event is redundant, and might
* be removed in the far future.
*/
MPV_EVENT_TRACKS_CHANGED = 9,
/**
* A video/audio/subtitle track was switched on or off.
*
* @deprecated This is equivalent to using mpv_observe_property() on the
* "vid", "aid", and "sid" properties. The event is redundant,
* and might be removed in the far future.
*/
MPV_EVENT_TRACK_SWITCHED = 10,
/**
* Idle mode was entered. In this mode, no file is played, and the playback
* core waits for new commands. (The command line player normally quits
* instead of entering idle mode, unless --idle was specified. If mpv
* was started with mpv_create(), idle mode is enabled by default.)
*/
MPV_EVENT_IDLE = 11,
/**
* Playback was paused. This indicates the user pause state.
*
* The user pause state is the state the user requested (changed with the
* "pause" property). There is an internal pause state too, which is entered
* if e.g. the network is too slow (the "core-idle" property generally
* indicates whether the core is playing or waiting).
*
* This event is sent whenever any pause states change, not only the user
* state. You might get multiple events in a row while these states change
* independently. But the event ID sent always indicates the user pause
* state.
*
* If you don't want to deal with this, use mpv_observe_property() on the
* "pause" property and ignore MPV_EVENT_PAUSE/UNPAUSE. Likewise, the
* "core-idle" property tells you whether video is actually playing or not.
*
* @deprecated The event is redundant with mpv_observe_property() as
* mentioned above, and might be removed in the far future.
*/
MPV_EVENT_PAUSE = 12,
/**
* Playback was unpaused. See MPV_EVENT_PAUSE for not so obvious details.
*
* @deprecated The event is redundant with mpv_observe_property() as
* explained in the MPV_EVENT_PAUSE comments, and might be
* removed in the far future.
*/
MPV_EVENT_UNPAUSE = 13,
/**
* Sent every time after a video frame is displayed. Note that currently,
* this will be sent in lower frequency if there is no video, or playback
* is paused - but that will be removed in the future, and it will be
* restricted to video frames only.
*/
MPV_EVENT_TICK = 14,
/**
* @deprecated This was used internally with the internal "script_dispatch"
* command to dispatch keyboard and mouse input for the OSC.
* It was never useful in general and has been completely
* replaced with "script-binding".
* This event never happens anymore, and is included in this
* header only for compatibility.
*/
MPV_EVENT_SCRIPT_INPUT_DISPATCH = 15,
/**
* Triggered by the script-message input command. The command uses the
* first argument of the command as client name (see mpv_client_name()) to
* dispatch the message, and passes along all arguments starting from the
* second argument as strings.
* See also mpv_event and mpv_event_client_message.
*/
MPV_EVENT_CLIENT_MESSAGE = 16,
/**
* Happens after video changed in some way. This can happen on resolution
* changes, pixel format changes, or video filter changes. The event is
* sent after the video filters and the VO are reconfigured. Applications
* embedding a mpv window should listen to this event in order to resize
* the window if needed.
* Note that this event can happen sporadically, and you should check
* yourself whether the video parameters really changed before doing
* something expensive.
*/
MPV_EVENT_VIDEO_RECONFIG = 17,
/**
* Similar to MPV_EVENT_VIDEO_RECONFIG. This is relatively uninteresting,
* because there is no such thing as audio output embedding.
*/
MPV_EVENT_AUDIO_RECONFIG = 18,
/**
* Happens when metadata (like file tags) is possibly updated. (It's left
* unspecified whether this happens on file start or only when it changes
* within a file.)
*
* @deprecated This is equivalent to using mpv_observe_property() on the
* "metadata" property. The event is redundant, and might
* be removed in the far future.
*/
MPV_EVENT_METADATA_UPDATE = 19,
/**
* Happens when a seek was initiated. Playback stops. Usually it will
* resume with MPV_EVENT_PLAYBACK_RESTART as soon as the seek is finished.
*/
MPV_EVENT_SEEK = 20,
/**
* There was a discontinuity of some sort (like a seek), and playback
* was reinitialized. Usually happens after seeking, or ordered chapter
* segment switches. The main purpose is allowing the client to detect
* when a seek request is finished.
*/
MPV_EVENT_PLAYBACK_RESTART = 21,
/**
* Event sent due to mpv_observe_property().
* See also mpv_event and mpv_event_property.
*/
MPV_EVENT_PROPERTY_CHANGE = 22,
/**
* Happens when the current chapter changes.
*
* @deprecated This is equivalent to using mpv_observe_property() on the
* "chapter" property. The event is redundant, and might
* be removed in the far future.
*/
MPV_EVENT_CHAPTER_CHANGE = 23,
/**
* Happens if the internal per-mpv_handle ringbuffer overflows, and at
* least 1 event had to be dropped. This can happen if the client doesn't
* read the event queue quickly enough with mpv_wait_event(), or if the
* client makes a very large number of asynchronous calls at once.
*
* Event delivery will continue normally once this event was returned
* (this forces the client to empty the queue completely).
*/
MPV_EVENT_QUEUE_OVERFLOW = 24
// Internal note: adjust INTERNAL_EVENT_BASE when adding new events.
} mpv_event_id;
/**
* Return a string describing the event. For unknown events, NULL is returned.
*
* Note that all events actually returned by the API will also yield a non-NULL
* string with this function.
*
* @param event event ID, see see enum mpv_event_id
* @return A static string giving a short symbolic name of the event. It
* consists of lower-case alphanumeric characters and can include "-"
* characters. This string is suitable for use in e.g. scripting
* interfaces.
* The string is completely static, i.e. doesn't need to be deallocated,
* and is valid forever.
*/
const char *mpv_event_name(mpv_event_id event);
typedef struct mpv_event_property {
/**
* Name of the property.
*/
const char *name;
/**
* Format of the data field in the same struct. See enum mpv_format.
* This is always the same format as the requested format, except when
* the property could not be retrieved (unavailable, or an error happened),
* in which case the format is MPV_FORMAT_NONE.
*/
mpv_format format;
/**
* Received property value. Depends on the format. This is like the
* pointer argument passed to mpv_get_property().
*
* For example, for MPV_FORMAT_STRING you get the string with:
*
* char *value = *(char **)(event_property->data);
*
* Note that this is set to NULL if retrieving the property failed (the
* format will be MPV_FORMAT_NONE).
* See mpv_event.error for the status.
*/
void *data;
} mpv_event_property;
/**
* Numeric log levels. The lower the number, the more important the message is.
* MPV_LOG_LEVEL_NONE is never used when receiving messages. The string in
* the comment after the value is the name of the log level as used for the
* mpv_request_log_messages() function.
* Unused numeric values are unused, but reserved for future use.
*/
typedef enum mpv_log_level {
MPV_LOG_LEVEL_NONE = 0, /// "no" - disable absolutely all messages
MPV_LOG_LEVEL_FATAL = 10, /// "fatal" - critical/aborting errors
MPV_LOG_LEVEL_ERROR = 20, /// "error" - simple errors
MPV_LOG_LEVEL_WARN = 30, /// "warn" - possible problems
MPV_LOG_LEVEL_INFO = 40, /// "info" - informational message
MPV_LOG_LEVEL_V = 50, /// "v" - noisy informational message
MPV_LOG_LEVEL_DEBUG = 60, /// "debug" - very noisy technical information
MPV_LOG_LEVEL_TRACE = 70, /// "trace" - extremely noisy
} mpv_log_level;
typedef struct mpv_event_log_message {
/**
* The module prefix, identifies the sender of the message. As a special
* case, if the message buffer overflows, this will be set to the string
* "overflow" (which doesn't appear as prefix otherwise), and the text
* field will contain an informative message.
*/
const char *prefix;
/**
* The log level as string. See mpv_request_log_messages() for possible
* values. The level "no" is never used here.
*/
const char *level;
/**
* The log message. It consists of 1 line of text, and is terminated with
* a newline character. (Before API version 1.6, it could contain multiple
* or partial lines.)
*/
const char *text;
/**
* The same contents as the level field, but as a numeric ID.
* Since API version 1.6.
*/
mpv_log_level log_level;
} mpv_event_log_message;
/// Since API version 1.9.
typedef enum mpv_end_file_reason {
/**
* The end of file was reached. Sometimes this may also happen on
* incomplete or corrupted files, or if the network connection was
* interrupted when playing a remote file. It also happens if the
* playback range was restricted with --end or --frames or similar.
*/
MPV_END_FILE_REASON_EOF = 0,
/**
* Playback was stopped by an external action (e.g. playlist controls).
*/
MPV_END_FILE_REASON_STOP = 2,
/**
* Playback was stopped by the quit command or player shutdown.
*/
MPV_END_FILE_REASON_QUIT = 3,
/**
* Some kind of error happened that lead to playback abort. Does not
* necessarily happen on incomplete or broken files (in these cases, both
* MPV_END_FILE_REASON_ERROR or MPV_END_FILE_REASON_EOF are possible).
*
* mpv_event_end_file.error will be set.
*/
MPV_END_FILE_REASON_ERROR = 4,
/**
* The file was a playlist or similar. When the playlist is read, its
* entries will be appended to the playlist after the entry of the current
* file, the entry of the current file is removed, and a MPV_EVENT_END_FILE
* event is sent with reason set to MPV_END_FILE_REASON_REDIRECT. Then
* playback continues with the playlist contents.
* Since API version 1.18.
*/
MPV_END_FILE_REASON_REDIRECT = 5,
} mpv_end_file_reason;
typedef struct mpv_event_end_file {
/**
* Corresponds to the values in enum mpv_end_file_reason (the "int" type
* will be replaced with mpv_end_file_reason on the next ABI bump).
*
* Unknown values should be treated as unknown.
*/
int reason;
/**
* If reason==MPV_END_FILE_REASON_ERROR, this contains a mpv error code
* (one of MPV_ERROR_...) giving an approximate reason why playback
* failed. In other cases, this field is 0 (no error).
* Since API version 1.9.
*/
int error;
} mpv_event_end_file;
/** @deprecated see MPV_EVENT_SCRIPT_INPUT_DISPATCH for remarks
*/
typedef struct mpv_event_script_input_dispatch {
int arg0;
const char *type;
} mpv_event_script_input_dispatch;
typedef struct mpv_event_client_message {
/**
* Arbitrary arguments chosen by the sender of the message. If num_args > 0,
* you can access args[0] through args[num_args - 1] (inclusive). What
* these arguments mean is up to the sender and receiver.
* None of the valid items are NULL.
*/
int num_args;
const char **args;
} mpv_event_client_message;
typedef struct mpv_event {
/**
* One of mpv_event. Keep in mind that later ABI compatible releases might
* add new event types. These should be ignored by the API user.
*/
mpv_event_id event_id;
/**
* This is mainly used for events that are replies to (asynchronous)
* requests. It contains a status code, which is >= 0 on success, or < 0
* on error (a mpv_error value). Usually, this will be set if an
* asynchronous request fails.
* Used for:
* MPV_EVENT_GET_PROPERTY_REPLY
* MPV_EVENT_SET_PROPERTY_REPLY
* MPV_EVENT_COMMAND_REPLY
*/
int error;
/**
* If the event is in reply to a request (made with this API and this
* API handle), this is set to the reply_userdata parameter of the request
* call. Otherwise, this field is 0.
* Used for:
* MPV_EVENT_GET_PROPERTY_REPLY
* MPV_EVENT_SET_PROPERTY_REPLY
* MPV_EVENT_COMMAND_REPLY
* MPV_EVENT_PROPERTY_CHANGE
*/
uint64_t reply_userdata;
/**
* The meaning and contents of the data member depend on the event_id:
* MPV_EVENT_GET_PROPERTY_REPLY: mpv_event_property*
* MPV_EVENT_PROPERTY_CHANGE: mpv_event_property*
* MPV_EVENT_LOG_MESSAGE: mpv_event_log_message*
* MPV_EVENT_CLIENT_MESSAGE: mpv_event_client_message*
* MPV_EVENT_END_FILE: mpv_event_end_file*
* other: NULL
*
* Note: future enhancements might add new event structs for existing or new
* event types.
*/
void *data;
} mpv_event;
/**
* Enable or disable the given event.
*
* Some events are enabled by default. Some events can't be disabled.
*
* (Informational note: currently, all events are enabled by default, except
* MPV_EVENT_TICK.)
*
* @param event See enum mpv_event_id.
* @param enable 1 to enable receiving this event, 0 to disable it.
* @return error code
*/
int mpv_request_event(mpv_handle *ctx, mpv_event_id event, int enable);
/**
* Enable or disable receiving of log messages. These are the messages the
* command line player prints to the terminal. This call sets the minimum
* required log level for a message to be received with MPV_EVENT_LOG_MESSAGE.
*
* @param min_level Minimal log level as string. Valid log levels:
* no fatal error warn info v debug trace
* The value "no" disables all messages. This is the default.
* An exception is the value "terminal-default", which uses the
* log level as set by the "--msg-level" option. This works
* even if the terminal is disabled. (Since API version 1.19.)
* Also see mpv_log_level.
*/
int mpv_request_log_messages(mpv_handle *ctx, const char *min_level);
/**
* Wait for the next event, or until the timeout expires, or if another thread
* makes a call to mpv_wakeup(). Passing 0 as timeout will never wait, and
* is suitable for polling.
*
* The internal event queue has a limited size (per client handle). If you
* don't empty the event queue quickly enough with mpv_wait_event(), it will
* overflow and silently discard further events. If this happens, making
* asynchronous requests will fail as well (with MPV_ERROR_EVENT_QUEUE_FULL).
*
* Only one thread is allowed to call this on the same mpv_handle at a time.
* The API won't complain if more than one thread calls this, but it will cause
* race conditions in the client when accessing the shared mpv_event struct.
* Note that most other API functions are not restricted by this, and no API
* function internally calls mpv_wait_event(). Additionally, concurrent calls
* to different mpv_handles are always safe.
*
* @param timeout Timeout in seconds, after which the function returns even if
* no event was received. A MPV_EVENT_NONE is returned on
* timeout. A value of 0 will disable waiting. Negative values
* will wait with an infinite timeout.
* @return A struct containing the event ID and other data. The pointer (and
* fields in the struct) stay valid until the next mpv_wait_event()
* call, or until the mpv_handle is destroyed. You must not write to
* the struct, and all memory referenced by it will be automatically
* released by the API on the next mpv_wait_event() call, or when the
* context is destroyed. The return value is never NULL.
*/
mpv_event *mpv_wait_event(mpv_handle *ctx, double timeout);
/**
* Interrupt the current mpv_wait_event() call. This will wake up the thread
* currently waiting in mpv_wait_event(). If no thread is waiting, the next
* mpv_wait_event() call will return immediately (this is to avoid lost
* wakeups).
*
* mpv_wait_event() will receive a MPV_EVENT_NONE if it's woken up due to
* this call. But note that this dummy event might be skipped if there are
* already other events queued. All what counts is that the waiting thread
* is woken up at all.
*/
void mpv_wakeup(mpv_handle *ctx);
/**
* Set a custom function that should be called when there are new events. Use
* this if blocking in mpv_wait_event() to wait for new events is not feasible.
*
* Keep in mind that the callback will be called from foreign threads. You
* must not make any assumptions of the environment, and you must return as
* soon as possible. You are not allowed to call any client API functions
* inside of the callback. In particular, you should not do any processing in
* the callback, but wake up another thread that does all the work. It's also
* possible that the callback is called from a thread while a mpv API function
* is called (i.e. it can be reentrant).
*
* In general, the client API expects you to call mpv_wait_event() to receive
* notifications, and the wakeup callback is merely a helper utility to make
* this easier in certain situations. Note that it's possible that there's
* only one wakeup callback invocation for multiple events. You should call
* mpv_wait_event() with no timeout until MPV_EVENT_NONE is reached, at which
* point the event queue is empty.
*
* If you actually want to do processing in a callback, spawn a thread that
* does nothing but call mpv_wait_event() in a loop and dispatches the result
* to a callback.
*
* Only one wakeup callback can be set.
*
* @param cb function that should be called if a wakeup is required
* @param d arbitrary userdata passed to cb
*/
void mpv_set_wakeup_callback(mpv_handle *ctx, void (*cb)(void *d), void *d);
/**
* Return a UNIX file descriptor referring to the read end of a pipe. This
* pipe can be used to wake up a poll() based processing loop. The purpose of
* this function is very similar to mpv_set_wakeup_callback(), and provides
* a primitive mechanism to handle coordinating a foreign event loop and the
* libmpv event loop. The pipe is non-blocking. It's closed when the mpv_handle
* is destroyed. This function always returns the same value (on success).
*
* This is in fact implemented using the same underlying code as for
* mpv_set_wakeup_callback() (though they don't conflict), and it is as if each
* callback invocation writes a single 0 byte to the pipe. When the pipe
* becomes readable, the code calling poll() (or select()) on the pipe should
* read all contents of the pipe and then call mpv_wait_event(c, 0) until
* no new events are returned. The pipe contents do not matter and can just
* be discarded. There is not necessarily one byte per readable event in the
* pipe. For example, the pipes are non-blocking, and mpv won't block if the
* pipe is full. Pipes are normally limited to 4096 bytes, so if there are
* more than 4096 events, the number of readable bytes can not equal the number
* of events queued. Also, it's possible that mpv does not write to the pipe
* once it's guaranteed that the client was already signaled. See the example
* below how to do it correctly.
*
* Example:
*
* int pipefd = mpv_get_wakeup_pipe(mpv);
* if (pipefd < 0)
* error();
* while (1) {
* struct pollfd pfds[1] = {
* { .fd = pipefd, .events = POLLIN },
* };
* // Wait until there are possibly new mpv events.
* poll(pfds, 1, -1);
* if (pfds[0].revents & POLLIN) {
* // Empty the pipe. Doing this before calling mpv_wait_event()
* // ensures that no wakeups are missed. It's not so important to
* // make sure the pipe is really empty (it will just cause some
* // additional wakeups in unlikely corner cases).
* char unused[256];
* read(pipefd, unused, sizeof(unused));
* while (1) {
* mpv_event *ev = mpv_wait_event(mpv, 0);
* // If MPV_EVENT_NONE is received, the event queue is empty.
* if (ev->event_id == MPV_EVENT_NONE)
* break;
* // Process the event.
* ...
* }
* }
* }
*
* @return A UNIX FD of the read end of the wakeup pipe, or -1 on error.
* On MS Windows/MinGW, this will always return -1.
*/
int mpv_get_wakeup_pipe(mpv_handle *ctx);
/**
* Block until all asynchronous requests are done. This affects functions like
* mpv_command_async(), which return immediately and return their result as
* events.
*
* This is a helper, and somewhat equivalent to calling mpv_wait_event() in a
* loop until all known asynchronous requests have sent their reply as event,
* except that the event queue is not emptied.
*
* In case you called mpv_suspend() before, this will also forcibly reset the
* suspend counter of the given handle.
*/
void mpv_wait_async_requests(mpv_handle *ctx);
typedef enum mpv_sub_api {
/**
* For using mpv's OpenGL renderer on an external OpenGL context.
* mpv_get_sub_api(MPV_SUB_API_OPENGL_CB) returns mpv_opengl_cb_context*.
* This context can be used with mpv_opengl_cb_* functions.
* Will return NULL if unavailable (if OpenGL support was not compiled in).
* See opengl_cb.h for details.
*/
MPV_SUB_API_OPENGL_CB = 1
} mpv_sub_api;
/**
* This is used for additional APIs that are not strictly part of the core API.
* See the individual mpv_sub_api member values.
*/
void *mpv_get_sub_api(mpv_handle *ctx, mpv_sub_api sub_api);
#ifdef __cplusplus
}
#endif
#endif
Reference in New Issue View Git Blame Copy Permalink