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🎥 Command line media player
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C
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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. */
/* * Note: the client API is licensed under ISC (see above) to enable * other wrappers outside of mpv. But keep in mind that the * mpv core is by default still GPLv2+ - unless built with * --enable-lgpl, which makes it LGPLv2+. */
#ifndef MPV_CLIENT_API_H_#define MPV_CLIENT_API_H_
#include <stddef.h>#include <stdint.h>
#ifdef __cplusplusextern "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.) * * Asynchronous calls may be reordered in arbitrarily with other synchronous * and asynchronous calls. If you want a guaranteed order, you need to wait * until asynchronous calls report completion before doing the next call. * * See also the section "Asynchronous command details" in the manpage. * * 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. * - In certain cases, mpv may start sub processes (such as with the ytdl * wrapper script). * - Using UNIX IPC (off by default) will override the SIGPIPE signal handler, * and set it to SIG_IGN. * - mpv will reseed the legacy C random number generator by calling srand() at * some random point once. * * 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 * -------------------------- * * Using the render API (in render_cb.h) is recommended. This API requires * you to create and maintain an OpenGL context, to which you can render * video using a specific API call. This API does not include keyboard or mouse * input directly. * * There is an older way to embed the native mpv window into your own. You have * to get the raw window handle, and set it as "wid" option. This works on X11, * win32, and OSX only. It's much easier to use than the render API, but * also has various problems. * * Also see client API examples and the mpv manpage. There is an extensive * discussion here: * https://github.com/mpv-player/mpv-examples/tree/master/libmpv#methods-of-embedding-the-video-window * * 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. * * Also see: DOCS/compatibility.rst * * Future changes * -------------- * * This are the planned changes that will most likely be done on the next major * bump of the library: * * - remove all symbols and include files that are marked as deprecated * - reassign enum numerical values to remove gaps * - remove the mpv_opengl_init_params.extra_exts field * - change the type of mpv_event_end_file.reason * - disabling all events by default */
/** * 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, 107)
/** * The API user is allowed to "#define MPV_ENABLE_DEPRECATED 0" before * including any libmpv headers. Then deprecated symbols will be excluded * from the headers. (Of course, deprecated properties and commands and * other functionality will still work.) */#ifndef MPV_ENABLE_DEPRECATED#define MPV_ENABLE_DEPRECATED 1#endif
/** * 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 * --config=no. 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.) * For example: * mpv_set_option_string(mpv, "config-dir", "/my/path"); // set config root * mpv_set_option_string(mpv, "config", "yes"); // enable config loading * (call mpv_initialize() _after_ this) * - 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 returned. * * 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 are required 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. * * If the last mpv_handle is detached, the core player is destroyed. In * addition, if there are only weak mpv_handles (such as created by * mpv_create_weak_client() or internal scripts), these mpv_handles will * be sent MPV_EVENT_SHUTDOWN. This function may block until these clients * have responded to the shutdown event, and the core is finally destroyed. */void mpv_destroy(mpv_handle *ctx);
#if MPV_ENABLE_DEPRECATED/** * @deprecated use mpv_destroy(), which has exactly the same semantics (the * deprecation is a mere rename) * * Since mpv client API version 1.29: * If the last mpv_handle is detached, the core player is destroyed. In * addition, if there are only weak mpv_handles (such as created by * mpv_create_weak_client() or internal scripts), these mpv_handles will * be sent MPV_EVENT_SHUTDOWN. This function may block until these clients * have responded to the shutdown event, and the core is finally destroyed. * * Before mpv client API version 1.29: * This left 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);#endif
/** * Similar to mpv_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_destroy() is that while mpv_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_destroy() is called somewhere on the way, it's not safe to * call other functions concurrently on the same context. * * Since mpv client API version 1.29: * The first call on any mpv_handle will block until the core is destroyed. * This means it will wait until other mpv_handle have been destroyed. If you * want asynchronous destruction, just run the "quit" command, and then react * to the MPV_EVENT_SHUTDOWN event. * If another mpv_handle already called mpv_terminate_destroy(), this call will * not actually block. It will destroy the mpv_handle, and exit immediately, * while other mpv_handles might still be uninitializing. * * Before mpv client API version 1.29: * 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_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_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);
/** * This is the same as mpv_create_client(), but the created mpv_handle is * treated as a weak reference. If all mpv_handles referencing a core are * weak references, the core is automatically destroyed. (This still goes * through normal uninit of course. Effectively, if the last non-weak mpv_handle * is destroyed, then the weak mpv_handles receive MPV_EVENT_SHUTDOWN and are * asked to terminate as well.) * * Note if you want to use this like refcounting: you have to be aware that * mpv_terminate_destroy() _and_ mpv_destroy() for the last non-weak * mpv_handle will block until all weak mpv_handles are destroyed. */mpv_handle *mpv_create_weak_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);
#if MPV_ENABLE_DEPRECATED
/** * 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);
#endif
/** * 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. * * Safe to be called from mpv render API threads. */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 were 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. * * Does not use OSD and string expansion by default (unlike mpv_command_string() * and input.conf). * * @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. * * Does not use OSD and string expansion by default. * * The args argument can have one of the following formats: * * MPV_FORMAT_NODE_ARRAY: * Positional arguments. 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). The order * of arguments is as documented in each command description. * * MPV_FORMAT_NODE_MAP: * Named arguments. This requires at least an entry with the key "name" * to be present, which must be a string, and contains the command name. * The special entry "_flags" is optional, and if present, must be an * array of strings, each being a command prefix to apply. All other * entries are interpreted as arguments. They must use the argument names * as documented in each command description. Some commands do not * support named arguments at all, and must use MPV_FORMAT_NODE_ARRAY. * * @param[in] args mpv_node with format set to one of the values documented * above (see there for details) * @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). * Not many commands actually use this at all. * @return error code (the result parameter is not set on error) */int mpv_command_node(mpv_handle *ctx, mpv_node *args, mpv_node *result);
/** * This is essentially identical to mpv_command() but it also returns a result. * * Does not use OSD and string expansion by default. * * @param[in] args NULL-terminated list of strings. Usually, the first item * is the command, and the following items are arguments. * @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). * Not many commands actually use this at all. * @return error code (the result parameter is not set on error) */int mpv_command_ret(mpv_handle *ctx, const char **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. * * This also has OSD and string expansion enabled by default. */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. For commands that * return data, the data is put into mpv_event_command.result. * * Safe to be called from mpv render API threads. * * @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. * * Safe to be called from mpv render API threads. * * @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);
/** * Signal to all async requests with the matching ID to abort. This affects * the following API calls: * * mpv_command_async * mpv_command_node_async * * All of these functions take a reply_userdata parameter. This API function * tells all requests with the matching reply_userdata value to try to return * as soon as possible. If there are multiple requests with matching ID, it * aborts all of them. * * This API function is mostly asynchronous itself. It will not wait until the * command is aborted. Instead, the command will terminate as usual, but with * some work not done. How this is signaled depends on the specific command (for * example, the "subprocess" command will indicate it by "killed_by_us" set to * true in the result). How long it takes also depends on the situation. The * aborting process is completely asynchronous. * * Not all commands may support this functionality. In this case, this function * will have no effect. The same is true if the request using the passed * reply_userdata has already terminated, has not been started yet, or was * never in use at all. * * You have to be careful of race conditions: the time during which the abort * request will be effective is _after_ e.g. mpv_command_async() has returned, * and before the command has signaled completion with MPV_EVENT_COMMAND_REPLY. * * @param reply_userdata ID of the request to be aborted (see above) */void mpv_abort_async_command(mpv_handle *ctx, uint64_t reply_userdata);
/** * 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(). * * Safe to be called from mpv render API threads. * * @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. * * Safe to be called from mpv render API threads. * * @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. * * You always get an initial change notification. This is meant to initialize * the user's state to the current value of the property. * * 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 changed. 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. * * Only the mpv_handle on which this was called will receive the property * change events, or can unobserve them. * * Safe to be called from mpv render API threads. * * @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. * * Safe to be called from mpv render API threads. * * @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 * the client should react to this and quit with mpv_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() or mpv_command_node_async() request. * See also mpv_event and mpv_event_command. */ 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,#if MPV_ENABLE_DEPRECATED /** * 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,#endif /** * 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,#if MPV_ENABLE_DEPRECATED /** * 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. * * @deprecated Use mpv_observe_property() with relevant properties instead * (such as "playback-time"). */ 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,#endif /** * 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,#if MPV_ENABLE_DEPRECATED /** * 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,#endif /** * 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,#if MPV_ENABLE_DEPRECATED /** * 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,#endif /** * 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, /** * Triggered if a hook handler was registered with mpv_hook_add(), and the * hook is invoked. If you receive this, you must handle it, and continue * the hook with mpv_hook_continue(). * See also mpv_event and mpv_event_hook. */ MPV_EVENT_HOOK = 25, // 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). */ 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;
#if MPV_ENABLE_DEPRECATED/** @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;#endif
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_hook { /** * The hook name as passed to mpv_hook_add(). */ const char *name; /** * Internal ID that must be passed to mpv_hook_continue(). */ uint64_t id;} mpv_event_hook;
// Since API version 1.102.typedef struct mpv_event_command { /** * Result data of the command. Note that success/failure is signaled * separately via mpv_event.error. This field is only for result data * in case of success. Most commands leave it at MPV_FORMAT_NONE. Set * to MPV_FORMAT_NONE on failure. */ mpv_node result;} mpv_event_command;
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 * MPV_EVENT_HOOK */ 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* * MPV_EVENT_HOOK: mpv_event_hook* * MPV_EVENT_COMMAND_REPLY* mpv_event_command* * 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.) * * Safe to be called from mpv render API threads. * * @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. * @return error code */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. * * As long as the timeout is 0, this is safe to be called from mpv render API * threads. * * @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. * * Safe to be called from mpv render API threads. */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 (i.e. no long blocking waits). Exiting the callback through * any other means than a normal return is forbidden (no throwing exceptions, * no longjmp() calls). You must not change any local thread state (such as * the C floating point environment). * * 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. The callback is meant strictly for * notification only, and is called from arbitrary core parts of the player, * that make no considerations for reentrant API use or allowing the callee to * spend a lot of time doing other things. Keep in mind that 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);
/** * 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);
/** * A hook is like a synchronous event that blocks the player. You register * a hook handler with this function. You will get an event, which you need * to handle, and once things are ready, you can let the player continue with * mpv_hook_continue(). * * Currently, hooks can't be removed explicitly. But they will be implicitly * removed if the mpv_handle it was registered with is destroyed. This also * continues the hook if it was being handled by the destroyed mpv_handle (but * this should be avoided, as it might mess up order of hook execution). * * Hook handlers are ordered globally by priority and order of registration. * Handlers for the same hook with same priority are invoked in order of * registration (the handler registered first is run first). Handlers with * lower priority are run first (which seems backward). * * See the "Hooks" section in the manpage to see which hooks are currently * defined. * * Some hooks might be reentrant (so you get multiple MPV_EVENT_HOOK for the * same hook). If this can happen for a specific hook type, it will be * explicitly documented in the manpage. * * Only the mpv_handle on which this was called will receive the hook events, * or can "continue" them. * * @param reply_userdata This will be used for the mpv_event.reply_userdata * field for the received MPV_EVENT_HOOK events. * If you have no use for this, pass 0. * @param name The hook name. This should be one of the documented names. But * if the name is unknown, the hook event will simply be never * raised. * @param priority See remarks above. Use 0 as a neutral default. * @return error code (usually fails only on OOM) */int mpv_hook_add(mpv_handle *ctx, uint64_t reply_userdata, const char *name, int priority);
/** * Respond to a MPV_EVENT_HOOK event. You must call this after you have handled * the event. There is no way to "cancel" or "stop" the hook. * * Calling this will will typically unblock the player for whatever the hook * is responsible for (e.g. for the "on_load" hook it lets it continue * playback). * * It is explicitly undefined behavior to call this more than once for each * MPV_EVENT_HOOK, to pass an incorrect ID, or to call this on a mpv_handle * different from the one that registered the handler and received the event. * * @param id This must be the value of the mpv_event_hook.id field for the * corresponding MPV_EVENT_HOOK. * @return error code */int mpv_hook_continue(mpv_handle *ctx, uint64_t id);
#if MPV_ENABLE_DEPRECATED
/** * 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. * ... * } * } * } * * @deprecated this function will be removed in the future. If you need this * functionality, use mpv_set_wakeup_callback(), create a pipe * manually, and call write() on your pipe in the callback. * * @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);
/** * @deprecated use render.h */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. * * @deprecated use render.h */ 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. * * @deprecated use render.h */void *mpv_get_sub_api(mpv_handle *ctx, mpv_sub_api sub_api);
#endif
#ifdef __cplusplus}#endif
#endif