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implementing MediaSession using MPRIS

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NotificationManager will now ignore MediaStyle notifications
This commit is contained in:
Julian Winkler
2024-07-15 16:39:45 +02:00
parent eddd827e27
commit b54bed4784
9 changed files with 272 additions and 14 deletions
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117
src/api-impl-jni/media/android_media_session_MediaSession.c Normal file
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#include "../util.h"
#include "../defines.h"
#include "mpris-dbus.h"
#include "../generated_headers/android_media_session_MediaSession.h"
#include "../generated_headers/android_os_SystemClock.h"
#define MPRIS_BUS_NAME_PREFIX "org.mpris.MediaPlayer2."
#define MPRIS_OBJECT_NAME "/org/mpris/MediaPlayer2"
MediaPlayer2Player *mpris_player = NULL;
static jobject callback = NULL;
static jlong last_position = 0; // playback_position - SystemClock.elapsedRealtime in ms
static void on_bus_acquired(GDBusConnection *connection, const char *name, gpointer user_data)
{
g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON (mpris_player),
connection, MPRIS_OBJECT_NAME, NULL);
}
static gboolean on_media_player_handle_action(MediaPlayer2Player *mpris_player, GDBusMethodInvocation *invocation, char *method)
{
if (callback) {
JNIEnv *env = get_jni_env();
(*env)->CallVoidMethod(env, callback, _METHOD(_CLASS(callback), method, "()V"));
}
g_dbus_method_invocation_return_value(invocation, g_variant_new("()"));
return TRUE;
}
static gboolean on_media_player_handle_play_pause(MediaPlayer2Player *mpris_player, GDBusMethodInvocation *invocation, gpointer user_data)
{
gboolean is_playing = !strcmp("Playing", media_player2_player_get_playback_status(mpris_player));
return on_media_player_handle_action(mpris_player, invocation, is_playing ? "onPause" : "onPlay");
}
static gboolean on_media_player_handle_seek(MediaPlayer2Player *mpris_player, GDBusMethodInvocation *invocation, gint64 offset_us, gpointer user_data)
{
if (callback) {
JNIEnv *env = get_jni_env();
last_position += offset_us / 1000;
(*env)->CallVoidMethod(env, callback, _METHOD(_CLASS(callback), "onSeekTo", "(J)V"), last_position + Java_android_os_SystemClock_elapsedRealtime(env, NULL));
}
media_player2_player_complete_seek(mpris_player, invocation);
return TRUE;
}
static gboolean on_media_player_handle_set_position(MediaPlayer2Player *mpris_player, GDBusMethodInvocation *invocation, GVariant *trackid, gint64 pos_us, gpointer user_data)
{
if (callback) {
JNIEnv *env = get_jni_env();
(*env)->CallVoidMethod(env, callback, _METHOD(_CLASS(callback), "onSeekTo", "(J)V"), pos_us / 1000);
}
media_player2_player_complete_set_position(mpris_player, invocation);
return TRUE;
}
#define ACTION_PAUSE (1 << 1)
#define ACTION_PLAY (1 << 2)
#define ACTION_SKIP_TO_PREVIOUS (1 << 4)
#define ACTION_SKIP_TO_NEXT (1 << 5)
#define ACTION_SEEK_TO (1 << 8)
JNIEXPORT void JNICALL Java_android_media_session_MediaSession_nativeSetState(JNIEnv *env, jobject this, jint state,
jlong actions, jlong position, jlong update_time, jstring title_str, jstring artist_str, jstring art_url_str)
{
const char *playback_states[] = {"None", "Stopped", "Paused", "Playing"};
if (!mpris_player) {
mpris_player = media_player2_player_skeleton_new();
g_object_connect(mpris_player,
"signal::handle-play", on_media_player_handle_action, "onPlay",
"signal::handle-pause", on_media_player_handle_action, "onPause",
"signal::handle-next", on_media_player_handle_action, "onSkipToNext",
"signal::handle-previous", on_media_player_handle_action, "onSkipToPrevious",
"signal::handle-play-pause", on_media_player_handle_play_pause, NULL,
"signal::handle-seek", on_media_player_handle_seek, NULL,
"signal::handle-set-position", on_media_player_handle_set_position, NULL,
NULL);
g_bus_own_name(G_BUS_TYPE_SESSION, MPRIS_BUS_NAME_PREFIX "ATL", G_BUS_NAME_OWNER_FLAGS_NONE,
on_bus_acquired, NULL, NULL, mpris_player, NULL);
}
media_player2_player_set_playback_status(mpris_player, playback_states[state < 4 ? state : 0]);
media_player2_player_set_position(mpris_player, position * 1000);
last_position = position - update_time;
media_player2_player_set_can_control(mpris_player, !!(actions));
media_player2_player_set_can_play(mpris_player, !!(actions & ACTION_PLAY));
media_player2_player_set_can_pause(mpris_player, !!(actions & ACTION_PAUSE));
media_player2_player_set_can_seek(mpris_player, !!(actions & ACTION_SEEK_TO));
media_player2_player_set_can_go_next(mpris_player, !!(actions & ACTION_SKIP_TO_NEXT));
media_player2_player_set_can_go_previous(mpris_player, !!(actions & ACTION_SKIP_TO_PREVIOUS));
GVariantDict dict;
g_variant_dict_init(&dict, NULL);
g_variant_dict_insert(&dict, "mpris:trackid", "s", MPRIS_OBJECT_NAME "/Track/0");
if (art_url_str) {
const char *art_url = (*env)->GetStringUTFChars(env, art_url_str, NULL);
g_variant_dict_insert(&dict, "mpris:artUrl", "s", art_url);
(*env)->ReleaseStringUTFChars(env, art_url_str, art_url);
}
if (title_str) {
const char *title = (*env)->GetStringUTFChars(env, title_str, NULL);
g_variant_dict_insert(&dict, "xesam:title", "s", title);
(*env)->ReleaseStringUTFChars(env, title_str, title);
}
if (artist_str) {
const char *artist = (*env)->GetStringUTFChars(env, artist_str, NULL);
g_variant_dict_insert(&dict, "xesam:artist", "s", artist);
(*env)->ReleaseStringUTFChars(env, artist_str, artist);
}
media_player2_player_set_metadata(mpris_player, g_variant_dict_end(&dict));
}
JNIEXPORT void JNICALL Java_android_media_session_MediaSession_nativeSetCallback(JNIEnv *env, jobject this, jobject new_callback)
{
callback = _REF(new_callback);
}

25
src/api-impl-jni/media/org.mpris.MediaPlayer2.xml Normal file
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<node>
<interface name="org.mpris.MediaPlayer2.Player">
<method name="Play"/>
<method name="Pause"/>
<method name="PlayPause"/>
<method name="Next"/>
<method name="Previous"/>
<method name="Seek">
<arg name="Offset" direction="in" type="x"/>
</method>
<method name="SetPosition">
<arg name="TrackId" direction="in" type="o"/>
<arg name="Position" direction="in" type="x"/>
</method>
<property name="CanControl" type="b" access="read"/>
<property name="CanPlay" type="b" access="read"/>
<property name="CanPause" type="b" access="read"/>
<property name="CanSeek" type="b" access="read"/>
<property name="CanGoNext" type="b" access="read"/>
<property name="CanGoPrevious" type="b" access="read"/>
<property name="Metadata" type="a{sv}" access="read"/>
<property name="PlaybackStatus" type="s" access="read"/>
<property name="Position" type="x" access="read"/>
</interface>
</node>