src/third_party/pulseaudio_includes/pulseaudio.12.2/pulse/ext-stream-restore.h

#ifndef foopulseextstreamrestorehfoo
#define foopulseextstreamrestorehfoo

/***
  This file is part of PulseAudio.

  Copyright 2008 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
  General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/

#include <pulse/cdecl.h>
#include <pulse/context.h>
#include <pulse/version.h>
#include <pulse/volume.h>
#include <pulse/channelmap.h>

/** \file
 *
 * Routines for controlling module-stream-restore
 */

PA_C_DECL_BEGIN

/** Stores information about one entry in the stream database that is
 * maintained by module-stream-restore. \since 0.9.12 */
typedef struct pa_ext_stream_restore_info {
    const char *name;            /**< Identifier string of the stream. A string like "sink-input-by-role:" or similar followed by some arbitrary property value. */
    pa_channel_map channel_map;  /**< The channel map for the volume field, if applicable */
    pa_cvolume volume;           /**< The volume of the stream when it was seen last, if applicable and saved */
    const char *device;          /**< The sink/source of the stream when it was last seen, if applicable and saved */
    int mute;                    /**< The boolean mute state of the stream when it was last seen, if applicable and saved */
} pa_ext_stream_restore_info;

/** Callback prototype for pa_ext_stream_restore_test(). \since 0.9.12 */
typedef void (*pa_ext_stream_restore_test_cb_t)(
        pa_context *c,
        uint32_t version,
        void *userdata);

/** Test if this extension module is available in the server. \since 0.9.12 */
pa_operation *pa_ext_stream_restore_test(
        pa_context *c,
        pa_ext_stream_restore_test_cb_t cb,
        void *userdata);

/** Callback prototype for pa_ext_stream_restore_read(). \since 0.9.12 */
typedef void (*pa_ext_stream_restore_read_cb_t)(
        pa_context *c,
        const pa_ext_stream_restore_info *info,
        int eol,
        void *userdata);

/** Read all entries from the stream database. \since 0.9.12 */
pa_operation *pa_ext_stream_restore_read(
        pa_context *c,
        pa_ext_stream_restore_read_cb_t cb,
        void *userdata);

/** Store entries in the stream database. \since 0.9.12 */
pa_operation *pa_ext_stream_restore_write(
        pa_context *c,
        pa_update_mode_t mode,
        const pa_ext_stream_restore_info data[],
        unsigned n,
        int apply_immediately,
        pa_context_success_cb_t cb,
        void *userdata);

/** Delete entries from the stream database. \since 0.9.12 */
pa_operation *pa_ext_stream_restore_delete(
        pa_context *c,
        const char *const s[],
        pa_context_success_cb_t cb,
        void *userdata);

/** Subscribe to changes in the stream database. \since 0.9.12 */
pa_operation *pa_ext_stream_restore_subscribe(
        pa_context *c,
        int enable,
        pa_context_success_cb_t cb,
        void *userdata);

/** Callback prototype for pa_ext_stream_restore_set_subscribe_cb(). \since 0.9.12 */
typedef void (*pa_ext_stream_restore_subscribe_cb_t)(
        pa_context *c,
        void *userdata);

/** Set the subscription callback that is called when
 * pa_ext_stream_restore_subscribe() was called. \since 0.9.12 */
void pa_ext_stream_restore_set_subscribe_cb(
        pa_context *c,
        pa_ext_stream_restore_subscribe_cb_t cb,
        void *userdata);

PA_C_DECL_END

#endif