sample: introduce pa_proplist_setp()

[pulseaudio] / src / pulse / proplist.h

#ifndef foopulseproplisthfoo
#define foopulseproplisthfoo

/***
  This file is part of PulseAudio.

  Copyright 2007 Lennart Poettering

  PulseAudio is free software; you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as
  published by the Free Software Foundation; either version 2.1 of the
  License, or (at your option) any later version.

  PulseAudio is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with PulseAudio; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  USA.
***/

#include <sys/types.h>

#include <pulse/cdecl.h>
#include <pulse/gccmacro.h>
#include <pulse/version.h>

PA_C_DECL_BEGIN

/** For streams: localized media name, formatted as UTF-8. e.g. "Guns'N'Roses: Civil War".*/
#define PA_PROP_MEDIA_NAME                     "media.name"

/** For streams: localized media title if applicable, formatted as UTF-8. e.g. "Civil War" */
#define PA_PROP_MEDIA_TITLE                    "media.title"

/** For streams: localized media artist if applicable, formatted as UTF-8. e.g. "Guns'N'Roses" */
#define PA_PROP_MEDIA_ARTIST                   "media.artist"

/** For streams: media language if applicable, in standard POSIX format. e.g. "de_DE" */
#define PA_PROP_MEDIA_LANGUAGE                 "media.language"

/** For streams: source filename if applicable, in URI format or local path. e.g. "/home/lennart/music/foobar.ogg" */
#define PA_PROP_MEDIA_FILENAME                 "media.filename"

/** \cond fulldocs */
/** For streams: icon for the media. A binary blob containing PNG image data */
#define PA_PROP_MEDIA_ICON                     "media.icon"
/** \endcond */

/** For streams: an XDG icon name for the media. e.g. "audio-x-mp3" */
#define PA_PROP_MEDIA_ICON_NAME                "media.icon_name"

/** For streams: logic role of this media. One of the strings "video", "music", "game", "event", "phone", "animation", "production", "a11y" */
#define PA_PROP_MEDIA_ROLE                     "media.role"

/** For event sound streams: XDG event sound name. e.g. "message-new-email" (Event sound streams are those with media.role set to "event") */
#define PA_PROP_EVENT_ID                       "event.id"

/** For event sound streams: localized human readable one-line description of the event, formatted as UTF-8. e.g. "Email from lennart@example.com received." */
#define PA_PROP_EVENT_DESCRIPTION              "event.description"

/** For event sound streams: absolute horizontal mouse position on the screen if the event sound was triggered by a mouse click, integer formatted as text string. e.g. "865" */
#define PA_PROP_EVENT_MOUSE_X                  "event.mouse.x"

/** For event sound streams: absolute vertical mouse position on the screen if the event sound was triggered by a mouse click, integer formatted as text string. e.g. "432" */
#define PA_PROP_EVENT_MOUSE_Y                  "event.mouse.y"

/** For event sound streams: relative horizontal mouse position on the screen if the event sound was triggered by a mouse click, float formatted as text string, ranging from 0.0 (left side of the screen) to 1.0 (right side of the screen). e.g. "0.65" */
#define PA_PROP_EVENT_MOUSE_HPOS               "event.mouse.hpos"

/** For event sound streams: relative vertical mouse position on the screen if the event sound was triggered by a mouse click, float formatted as text string, ranging from 0.0 (top of the screen) to 1.0 (bottom of the screen). e.g. "0.43" */
#define PA_PROP_EVENT_MOUSE_VPOS               "event.mouse.vpos"

/** For event sound streams: mouse button that triggered the event if applicable, integer formatted as string with 0=left, 1=middle, 2=right. e.g. "0" */
#define PA_PROP_EVENT_MOUSE_BUTTON             "event.mouse.button"

/** For streams that belong to a window on the screen: localized window title. e.g. "Totem Music Player" */
#define PA_PROP_WINDOW_NAME                    "window.name"

/** For streams that belong to a window on the screen: a textual id for identifying a window logically. e.g. "org.gnome.Totem.MainWindow" */
#define PA_PROP_WINDOW_ID                      "window.id"

/** \cond fulldocs */
/** For streams that belong to a window on the screen: window icon. A binary blob containing PNG image data */
#define PA_PROP_WINDOW_ICON                    "window.icon"
/** \endcond */

/** For streams that belong to a window on the screen: an XDG icon name for the window. e.g. "totem" */
#define PA_PROP_WINDOW_ICON_NAME               "window.icon_name"

/** For streams that belong to an X11 window on the screen: the X11 display string. e.g. ":0.0" */
#define PA_PROP_WINDOW_X11_DISPLAY             "window.x11.display"

/** For streams that belong to an X11 window on the screen: the X11 screen the window is on, an integer formatted as string. e.g. "0" */
#define PA_PROP_WINDOW_X11_SCREEN              "window.x11.screen"

/** For streams that belong to an X11 window on the screen: the X11 monitor the window is on, an integer formatted as string. e.g. "0" */
#define PA_PROP_WINDOW_X11_MONITOR             "window.x11.monitor"

/** For streams that belong to an X11 window on the screen: the window XID, an integer formatted as string. e.g. "25632" */
#define PA_PROP_WINDOW_X11_XID                 "window.x11.xid"

/** For clients/streams: localized human readable application name. e.g. "Totem Music Player" */
#define PA_PROP_APPLICATION_NAME               "application.name"

/** For clients/streams: a textual id for identifying an application logically. e.g. "org.gnome.Totem" */
#define PA_PROP_APPLICATION_ID                 "application.id"

/** For clients/streams: a version string e.g. "0.6.88" */
#define PA_PROP_APPLICATION_VERSION            "application.version"

/** \cond fulldocs */
/** For clients/streams: application icon. A binary blob containing PNG image data */
#define PA_PROP_APPLICATION_ICON               "application.icon"
/** \endcond */

/** For clients/streams: an XDG icon name for the application. e.g. "totem" */
#define PA_PROP_APPLICATION_ICON_NAME          "application.icon_name"

/** For clients/streams: application language if applicable, in standard POSIX format. e.g. "de_DE" */
#define PA_PROP_APPLICATION_LANGUAGE           "application.language"

/** For clients/streams on UNIX: application process PID, an integer formatted as string. e.g. "4711" */
#define PA_PROP_APPLICATION_PROCESS_ID         "application.process.id"

/** For clients/streams: application process name. e.g. "totem" */
#define PA_PROP_APPLICATION_PROCESS_BINARY     "application.process.binary"

/** For clients/streams: application user name. e.g. "lennart" */
#define PA_PROP_APPLICATION_PROCESS_USER       "application.process.user"

/** For clients/streams: host name the application runs on. e.g. "omega" */
#define PA_PROP_APPLICATION_PROCESS_HOST       "application.process.host"

/** For clients/streams: the D-Bus host id the application runs on. e.g. "543679e7b01393ed3e3e650047d78f6e" */
#define PA_PROP_APPLICATION_PROCESS_MACHINE_ID "application.process.machine_id"

/** For clients/streams: an id for the login session the application runs in. On Unix the value of $XDG_SESSION_COOKIE. e.g. "543679e7b01393ed3e3e650047d78f6e-1235159798.76193-190367717" */
#define PA_PROP_APPLICATION_PROCESS_SESSION_ID "application.process.session_id"

/** For devices: device string in the underlying audio layer's format. e.g. "surround51:0" */
#define PA_PROP_DEVICE_STRING                  "device.string"

/** For devices: API this device is access with. e.g. "alsa" */
#define PA_PROP_DEVICE_API                     "device.api"

/** For devices: localized human readable device one-line description, e.g. "Foobar Industries USB Headset 2000+ Ultra" */
#define PA_PROP_DEVICE_DESCRIPTION             "device.description"

/** For devices: bus path to the device in the OS' format. e.g. "/sys/bus/pci/devices/0000:00:1f.2" */
#define PA_PROP_DEVICE_BUS_PATH                "device.bus_path"

/** For devices: serial number if applicable. e.g. "4711-0815-1234" */
#define PA_PROP_DEVICE_SERIAL                  "device.serial"

/** For devices: vendor ID if applicable. e.g. 1274 */
#define PA_PROP_DEVICE_VENDOR_ID               "device.vendor.id"

/** For devices: vendor name if applicable. e.g. "Foocorp Heavy Industries" */
#define PA_PROP_DEVICE_VENDOR_NAME             "device.vendor.name"

/** For devices: product ID if applicable. e.g. 4565 */
#define PA_PROP_DEVICE_PRODUCT_ID              "device.product.id"

/** For devices: product name if applicable. e.g. "SuperSpeakers 2000 Pro" */
#define PA_PROP_DEVICE_PRODUCT_NAME            "device.product.name"

/** For devices: device class. One of "sound", "modem", "monitor", "filter" */
#define PA_PROP_DEVICE_CLASS                   "device.class"

/** For devices: form factor if applicable. One of "internal", "speaker", "handset", "tv", "webcam", "microphone", "headset", "headphone", "hands-free", "car", "hifi", "computer", "portable" */
#define PA_PROP_DEVICE_FORM_FACTOR             "device.form_factor"

/** For devices: bus of the device if applicable. One of "isa", "pci", "usb", "firewire", "bluetooth" */
#define PA_PROP_DEVICE_BUS                     "device.bus"

/** \cond fulldocs */
/** For devices: icon for the device. A binary blob containing PNG image data */
#define PA_PROP_DEVICE_ICON                    "device.icon"
/** \endcond */

/** For devices: an XDG icon name for the device. e.g. "sound-card-speakers-usb" */
#define PA_PROP_DEVICE_ICON_NAME               "device.icon_name"

/** For devices: access mode of the device if applicable. One of "mmap", "mmap_rewrite", "serial" */
#define PA_PROP_DEVICE_ACCESS_MODE             "device.access_mode"

/** For filter devices: master device id if applicable. */
#define PA_PROP_DEVICE_MASTER_DEVICE           "device.master_device"

/** For devices: buffer size in bytes, integer formatted as string.. */
#define PA_PROP_DEVICE_BUFFERING_BUFFER_SIZE   "device.buffering.buffer_size"

/** For devices: fragment size in bytes, integer formatted as string. */
#define PA_PROP_DEVICE_BUFFERING_FRAGMENT_SIZE "device.buffering.fragment_size"

/** For devices: profile identifier for the profile this devices is in. e.g. "analog-stereo", "analog-surround-40", "iec958-stereo", ...*/
#define PA_PROP_DEVICE_PROFILE_NAME            "device.profile.name"

/** For devices: human readable one-line description of the profile this device is in. e.g. "Analog Stereo", ... */
#define PA_PROP_DEVICE_PROFILE_DESCRIPTION     "device.profile.description"

/** For modules: the author's name, formatted as UTF-8 string. e.g. "Lennart Poettering" */
#define PA_PROP_MODULE_AUTHOR                  "module.author"

/** For modules: a human readable one-line description of the module's purpose formatted as UTF-8. e.g. "Frobnicate sounds with a flux compensator" */
#define PA_PROP_MODULE_DESCRIPTION             "module.description"

/** For modules: a human readable usage description of the module's arguments formatted as UTF-8. */
#define PA_PROP_MODULE_USAGE                   "module.usage"

/** For modules: a version string for the module. e.g. "0.9.15" */
#define PA_PROP_MODULE_VERSION                 "module.version"

/** A property list object. Basically a dictionary with ASCII strings
 * as keys and arbitrary data as values. \since 0.9.11 */
typedef struct pa_proplist pa_proplist;

/** Allocate a property list. \since 0.9.11 */
pa_proplist* pa_proplist_new(void);

/** Free the property list. \since 0.9.11 */
void pa_proplist_free(pa_proplist* p);

/** Append a new string entry to the property list, possibly
 * overwriting an already existing entry with the same key. An
 * internal copy of the data passed is made. Will accept only valid
 * UTF-8. \since 0.9.11 */
int pa_proplist_sets(pa_proplist *p, const char *key, const char *value);

/** Append a new string entry to the property list, possibly
 * overwriting an already existing entry with the same key. An
 * internal copy of the data passed is made. Will accept only valid
 * UTF-8. The string passed in must contain a '='. Left hand side of
 * the '=' is used as key name, the right hand side as string
 * data. \since 0.9.16 */
int pa_proplist_setp(pa_proplist *p, const char *pair);

/** Append a new string entry to the property list, possibly
 * overwriting an already existing entry with the same key. An
 * internal copy of the data passed is made. Will accept only valid
 * UTF-8. The data can be passed as printf()-style format string with
 * arguments. \since 0.9.11 */
int pa_proplist_setf(pa_proplist *p, const char *key, const char *format, ...) PA_GCC_PRINTF_ATTR(3,4);

/** Append a new arbitrary data entry to the property list, possibly
 * overwriting an already existing entry with the same key. An
 * internal copy of the data passed is made. \since 0.9.11 */
int pa_proplist_set(pa_proplist *p, const char *key, const void *data, size_t nbytes);

/** Return a string entry for the specified key. Will return NULL if
 * the data is not valid UTF-8. Will return a NUL-terminated string in
 * an internally allocated buffer. The caller should make a copy of
 * the data before accessing the property list again. \since 0.9.11 */
const char *pa_proplist_gets(pa_proplist *p, const char *key);

/** Return the the value for the specified key. Will return a
 * NUL-terminated string for string entries. The pointer returned will
 * point to an internally allocated buffer. The caller should make a
 * copy of the data before the property list is accessed again. \since
 * 0.9.11 */
int pa_proplist_get(pa_proplist *p, const char *key, const void **data, size_t *nbytes);

/** Update mode enum for pa_proplist_update(). \since 0.9.11 */
typedef enum pa_update_mode {
    PA_UPDATE_SET
    /**< Replace the entire property list with the new one. Don't keep
     *  any of the old data around */,

    PA_UPDATE_MERGE
    /**< Merge new property list into the existing one, not replacing
     *  any old entries if they share a common key with the new
     *  property list. */,

    PA_UPDATE_REPLACE
    /**< Merge new property list into the existing one, replacing all
     *  old entries that share a common key with the new property
     *  list. */
} pa_update_mode_t;

/** \cond fulldocs */
#define PA_UPDATE_SET PA_UPDATE_SET
#define PA_UPDATE_MERGE PA_UPDATE_MERGE
#define PA_UPDATE_REPLACE PA_UPDATE_REPLACE
/** \endcond */

/** Merge property list "other" into "p", adhering the merge mode as
 * specified in "mode". \since 0.9.11 */
void pa_proplist_update(pa_proplist *p, pa_update_mode_t mode, pa_proplist *other);

/** Removes a single entry from the property list, identified be the
 * specified key name. \since 0.9.11 */
int pa_proplist_unset(pa_proplist *p, const char *key);

/** Similar to pa_proplist_remove() but takes an array of keys to
 * remove. The array should be terminated by a NULL pointer. Return -1
 * on failure, otherwise the number of entries actually removed (which
 * might even be 0, if there where no matching entries to
 * remove). \since 0.9.11 */
int pa_proplist_unset_many(pa_proplist *p, const char * const keys[]);

/** Iterate through the property list. The user should allocate a
 * state variable of type void* and initialize it with NULL. A pointer
 * to this variable should then be passed to pa_proplist_iterate()
 * which should be called in a loop until it returns NULL which
 * signifies EOL. The property list should not be modified during
 * iteration through the list -- except for deleting the current
 * looked at entry. On each invication this function will return the
 * key string for the next entry. The keys in the property list do not
 * have any particular order. \since 0.9.11 */
const char *pa_proplist_iterate(pa_proplist *p, void **state);

/** Format the property list nicely as a human readable string. This
 * works very much like pa_proplist_to_string_sep() and uses a newline
 * as seperator and appends one final one. Call pa_xfree() on the
 * result. \since 0.9.11 */
char *pa_proplist_to_string(pa_proplist *p);

/** Format the property list nicely as a human readable string and
 * choose the seperator. Call pa_xfree() on the result. \since
 * 0.9.15 */
char *pa_proplist_to_string_sep(pa_proplist *p, const char *sep);

/** Allocate a new property list and assign key/value from a human
 * readable string. \since 0.9.15 */
pa_proplist *pa_proplist_from_string(const char *str);

  /** Returns 1 if an entry for the specified key is existant in the
 * property list. \since 0.9.11 */
int pa_proplist_contains(pa_proplist *p, const char *key);

/** Remove all entries from the property list object. \since 0.9.11 */
void pa_proplist_clear(pa_proplist *p);

/** Allocate a new property list and copy over every single entry from
 * the specific list. \since 0.9.11 */
pa_proplist* pa_proplist_copy(pa_proplist *t);

/** Return the number of entries on the property list. \since 0.9.15 */
unsigned pa_proplist_size(pa_proplist *t);

/** Returns 0 when the proplist is empty, positive otherwise \since 0.9.15 */
int pa_proplist_isempty(pa_proplist *t);

PA_C_DECL_END

#endif