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-rw-r--r--src/modules/alsa/alsa-sink.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/src/modules/alsa/alsa-sink.c b/src/modules/alsa/alsa-sink.c
index 0a1ebb1e..83fc9e1e 100644
--- a/src/modules/alsa/alsa-sink.c
+++ b/src/modules/alsa/alsa-sink.c
@@ -53,6 +53,8 @@
#include <pulsecore/rtclock.h>
#include <pulsecore/time-smoother.h>
+#include <modules/reserve-wrap.h>
+
#include "alsa-util.h"
#include "alsa-sink.h"
@@ -101,10 +103,62 @@ struct userdata {
pa_smoother *smoother;
uint64_t write_count;
uint64_t since_start;
+
+ pa_reserve_wrapper *reserve;
+ pa_hook_slot *reserve_slot;
};
static void userdata_free(struct userdata *u);
+static pa_hook_result_t reserve_cb(pa_reserve_wrapper *r, void *forced, struct userdata *u) {
+ pa_assert(r);
+ pa_assert(u);
+
+ if (pa_sink_suspend(u->sink, TRUE) < 0)
+ return PA_HOOK_CANCEL;
+
+ return PA_HOOK_OK;
+}
+
+static void reserve_done(struct userdata *u) {
+ pa_assert(u);
+
+ if (u->reserve_slot) {
+ pa_hook_slot_free(u->reserve_slot);
+ u->reserve_slot = NULL;
+ }
+
+ if (u->reserve) {
+ pa_reserve_wrapper_unref(u->reserve);
+ u->reserve = NULL;
+ }
+}
+
+static int reserve_init(struct userdata *u, const char *dname) {
+ char *rname;
+
+ pa_assert(u);
+ pa_assert(dname);
+
+ if (u->reserve)
+ return 0;
+
+ /* We are resuming, try to lock the device */
+ if (!(rname = pa_alsa_get_reserve_name(dname)))
+ return 0;
+
+ u->reserve = pa_reserve_wrapper_get(u->core, rname);
+ pa_xfree(rname);
+
+ if (!(u->reserve))
+ return -1;
+
+ pa_assert(!u->reserve_slot);
+ u->reserve_slot = pa_hook_connect(pa_reserve_wrapper_hook(u->reserve), PA_HOOK_NORMAL, (pa_hook_cb_t) reserve_cb, u);
+
+ return 0;
+}
+
static void fix_min_sleep_wakeup(struct userdata *u) {
size_t max_use, max_use_2;
@@ -601,6 +655,7 @@ static int build_pollfd(struct userdata *u) {
return 0;
}
+/* Called from IO context */
static int suspend(struct userdata *u) {
pa_assert(u);
pa_assert(u->pcm_handle);
@@ -622,6 +677,7 @@ static int suspend(struct userdata *u) {
return 0;
}
+/* Called from IO context */
static int update_sw_params(struct userdata *u) {
snd_pcm_uframes_t avail_min;
int err;
@@ -677,6 +733,7 @@ static int update_sw_params(struct userdata *u) {
return 0;
}
+/* Called from IO context */
static int unsuspend(struct userdata *u) {
pa_sample_spec ss;
int err;
@@ -749,6 +806,7 @@ fail:
return -1;
}
+/* Called from IO context */
static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
struct userdata *u = PA_SINK(o)->userdata;
@@ -804,6 +862,25 @@ static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offse
return pa_sink_process_msg(o, code, data, offset, chunk);
}
+/* Called from main context */
+static int sink_set_state_cb(pa_sink *s, pa_sink_state_t new_state) {
+ pa_sink_state_t old_state;
+ struct userdata *u;
+
+ pa_sink_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ old_state = pa_sink_get_state(u->sink);
+
+ if (PA_SINK_IS_OPENED(old_state) && new_state == PA_SINK_SUSPENDED)
+ reserve_done(u);
+ else if (old_state == PA_SINK_SUSPENDED && PA_SINK_IS_OPENED(new_state))
+ if (reserve_init(u, u->device_name) < 0)
+ return -1;
+
+ return 0;
+}
+
static int mixer_callback(snd_mixer_elem_t *elem, unsigned int mask) {
struct userdata *u = snd_mixer_elem_get_callback_private(elem);
@@ -1468,6 +1545,11 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
pa_smoother_set_time_offset(u->smoother, usec);
pa_smoother_pause(u->smoother, usec);
+ if (reserve_init(u, pa_modargs_get_value(
+ ma, "device_id",
+ pa_modargs_get_value(ma, "device", DEFAULT_DEVICE))) < 0)
+ goto fail;
+
b = use_mmap;
d = use_tsched;
@@ -1569,6 +1651,7 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
u->sink->parent.process_msg = sink_process_msg;
u->sink->update_requested_latency = sink_update_requested_latency_cb;
+ u->sink->set_state = sink_set_state_cb;
u->sink->userdata = u;
pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
@@ -1681,6 +1764,8 @@ static void userdata_free(struct userdata *u) {
if (u->smoother)
pa_smoother_free(u->smoother);
+ reserve_done(u);
+
pa_xfree(u->device_name);
pa_xfree(u);
}