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authorCharles Kerr <charles.kerr@canonical.com>2014-07-03 15:44:26 -0500
committerCharles Kerr <charles.kerr@canonical.com>2014-07-03 15:44:26 -0500
commit39ef739509b1f46d0e3a4144be5fbe543e2e885d (patch)
tree32ffb3128e3bbd793bb69abfd78c437e2c49f5e1 /src
parent2a28f458808556af4cda58a36997ab465cb360fb (diff)
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use the libgstreamer API instead of libcanberra to play audio sounds.
Diffstat (limited to 'src')
-rw-r--r--src/snap.cpp210
1 files changed, 85 insertions, 125 deletions
diff --git a/src/snap.cpp b/src/snap.cpp
index eab7001..cea09d7 100644
--- a/src/snap.cpp
+++ b/src/snap.cpp
@@ -23,7 +23,7 @@
#include <core/signal.h>
-#include <canberra.h>
+#include <gst/gst.h>
#include <libnotify/notify.h>
#include <glib/gi18n.h>
@@ -53,154 +53,136 @@ class Sound
public:
Sound(const std::shared_ptr<Clock>& clock,
- const std::string& filename,
+ const std::string& uri,
unsigned int volume,
unsigned int duration_minutes,
bool loop):
m_clock(clock),
- m_filename(filename),
+ m_uri(uri),
m_volume(volume),
m_loop(loop),
- m_canberra_id(get_next_canberra_id()),
- m_loop_end_time(clock->localtime().add_full(0, 0, 0, 0, duration_minutes, 0.0))
+ m_loop_end_time(clock->localtime().add_full(0, 0, 0, 0, (int)duration_minutes, 0.0))
{
+ // init GST once
+ static bool gst_initialized = false;
+ if (!gst_initialized)
+ {
+ gst_initialized = true;
+
+ GError* error = nullptr;
+ gst_init_check (nullptr, nullptr, &error);
+ if (error)
+ {
+ g_critical("Unable to play alarm sound: %s", error->message);
+ g_error_free(error);
+ }
+ }
+
if (m_loop)
{
g_debug("Looping '%s' until cutoff time %s",
- m_filename.c_str(),
+ m_uri.c_str(),
m_loop_end_time.format("%F %T").c_str());
}
else
{
- g_debug("Playing '%s' once", m_filename.c_str());
+ g_debug("Playing '%s' once", m_uri.c_str());
}
- const auto rv = ca_context_create(&m_context);
- if (rv == CA_SUCCESS)
- {
- play();
- }
- else
- {
- g_warning("Failed to create canberra context: %s", ca_strerror(rv));
- m_context = nullptr;
- }
+ m_play = gst_element_factory_make("playbin", "play");
+
+ auto bus = gst_pipeline_get_bus(GST_PIPELINE(m_play));
+ m_watch_source = gst_bus_add_watch(bus, bus_callback, this);
+ gst_object_unref(bus);
+
+ play();
}
~Sound()
{
stop();
- g_clear_pointer(&m_context, ca_context_destroy);
+ g_source_remove(m_watch_source);
+
+ if (m_play != nullptr)
+ {
+ gst_element_set_state (m_play, GST_STATE_NULL);
+ g_clear_pointer (&m_play, gst_object_unref);
+ }
}
private:
void stop()
{
- if (m_context != nullptr)
+ if (m_play != nullptr)
{
- const auto rv = ca_context_cancel(m_context, m_canberra_id);
- if (rv != CA_SUCCESS)
- g_warning("Failed to cancel alarm sound: %s", ca_strerror(rv));
- }
-
- if (m_loop_tag != 0)
- {
- g_source_remove(m_loop_tag);
- m_loop_tag = 0;
+ gst_element_set_state (m_play, GST_STATE_PAUSED);
}
}
void play()
{
- auto context = m_context;
- g_return_if_fail(context != nullptr);
-
- const auto filename = m_filename.c_str();
- const float gain = get_gain_level(m_volume);
-
- ca_proplist* props = nullptr;
- ca_proplist_create(&props);
- ca_proplist_sets(props, CA_PROP_MEDIA_FILENAME, filename);
- ca_proplist_setf(props, CA_PROP_CANBERRA_VOLUME, "%f", gain);
- const auto rv = ca_context_play_full(context, m_canberra_id, props,
- on_done_playing, this);
- if (rv != CA_SUCCESS)
- g_warning("Unable to play '%s': %s", filename, ca_strerror(rv));
-
- g_clear_pointer(&props, ca_proplist_destroy);
+ g_return_if_fail(m_play != nullptr);
+
+ g_object_set(G_OBJECT (m_play), "uri", m_uri.c_str(),
+ "volume", get_volume(),
+ nullptr);
+ gst_element_set_state (m_play, GST_STATE_PLAYING);
}
- static float get_gain_level(unsigned int volume)
+ gdouble get_volume() const
{
- const unsigned int clamped_volume = CLAMP(volume, 1, 100);
-
- /* This range isn't set in stone --
- arrived at from manual tests on Nextus 4 */
- constexpr float gain_low = -10;
- constexpr float gain_high = 10;
-
- constexpr float gain_range = gain_high - gain_low;
- return gain_low + (gain_range * (clamped_volume / 100.0f));
+ // input int range is [1..100]; gst playbin's range is [0...1.0]
+ return CLAMP(m_volume, 1, 100) / 100.0;
}
- static void on_done_playing(ca_context*, uint32_t, int rv, void* gself)
+ static gboolean bus_callback(GstBus*, GstMessage* msg, gpointer gself)
{
- // if we still need to loop, wait a second, then play it again
+ auto self = static_cast<Sound*>(gself);
- if (rv == CA_SUCCESS)
+ if ((GST_MESSAGE_TYPE(msg) == GST_MESSAGE_EOS) &&
+ (self->m_loop) &&
+ (self->m_clock->localtime() < self->m_loop_end_time))
{
- auto self = static_cast<Self*>(gself);
- if ((self->m_loop_tag == 0) &&
- (self->m_loop) &&
- (self->m_clock->localtime() < self->m_loop_end_time))
- {
- self->m_loop_tag = g_timeout_add_seconds(1, play_idle, self);
- }
+ gst_element_seek(self->m_play,
+ 1.0,
+ GST_FORMAT_TIME,
+ GST_SEEK_FLAG_FLUSH,
+ GST_SEEK_TYPE_SET,
+ 0,
+ GST_SEEK_TYPE_NONE,
+ (gint64)GST_CLOCK_TIME_NONE);
}
- }
- static gboolean play_idle(gpointer gself)
- {
- auto self = static_cast<Self*>(gself);
- self->m_loop_tag = 0;
- self->play();
- return G_SOURCE_REMOVE;
+ return G_SOURCE_CONTINUE; // keep listening
}
/***
****
***/
- static int32_t get_next_canberra_id()
- {
- static int32_t next_canberra_id = 1;
- return next_canberra_id++;
- }
-
const std::shared_ptr<Clock> m_clock;
- const std::string m_filename;
+ const std::string m_uri;
const unsigned int m_volume;
const bool m_loop;
- const int32_t m_canberra_id;
const DateTime m_loop_end_time;
- ca_context* m_context = nullptr;
- guint m_loop_tag = 0;
+ guint m_watch_source = 0;
+ GstElement* m_play = nullptr;
};
class SoundBuilder
{
public:
void set_clock(const std::shared_ptr<Clock>& c) {m_clock = c;}
- void set_filename(const std::string& s) {m_filename = s;}
+ void set_uri(const std::string& uri) {m_uri = uri;}
void set_volume(const unsigned int v) {m_volume = v;}
void set_duration_minutes(int unsigned i) {m_duration_minutes=i;}
void set_looping(bool b) {m_looping=b;}
Sound* operator()() {
return new Sound (m_clock,
- m_filename,
+ m_uri,
m_volume,
m_duration_minutes,
m_looping);
@@ -208,7 +190,7 @@ public:
private:
std::shared_ptr<Clock> m_clock;
- std::string m_filename;
+ std::string m_uri;
unsigned int m_volume = 50;
unsigned int m_duration_minutes = 30;
bool m_looping = true;
@@ -397,38 +379,8 @@ private:
*** libnotify -- snap decisions
**/
-std::string get_local_filename (const std::string& str)
-{
- std::string ret;
-
- if (!str.empty())
- {
- GFile* files[] = { g_file_new_for_path(str.c_str()),
- g_file_new_for_uri(str.c_str()) };
-
- for(auto& file : files)
- {
- if (g_file_is_native(file) && g_file_query_exists(file, nullptr))
- {
- char* tmp = g_file_get_path(file);
- if (tmp != nullptr)
- {
- ret = tmp;
- g_free(tmp);
- break;
- }
- }
- }
-
- for(auto& file : files)
- g_object_unref(file);
- }
-
- return ret;
-}
-
-std::string get_alarm_sound(const Appointment& appointment,
- const std::shared_ptr<const Settings>& settings)
+std::string get_alarm_uri(const Appointment& appointment,
+ const std::shared_ptr<const Settings>& settings)
{
const char* FALLBACK {"/usr/share/sounds/ubuntu/ringtones/Suru arpeggio.ogg"};
@@ -436,20 +388,28 @@ std::string get_alarm_sound(const Appointment& appointment,
settings->alarm_sound.get(),
FALLBACK };
- std::string alarm_sound;
+ std::string uri;
for(const auto& candidate : candidates)
{
- alarm_sound = get_local_filename(candidate);
-
- if (!alarm_sound.empty())
+ if (gst_uri_is_valid (candidate.c_str()))
+ {
+ uri = candidate;
break;
+ }
+ else if (g_file_test(candidate.c_str(), G_FILE_TEST_EXISTS))
+ {
+ gchar* tmp = gst_filename_to_uri(candidate.c_str(), nullptr);
+ if (tmp != nullptr)
+ {
+ uri = tmp;
+ g_free (tmp);
+ break;
+ }
+ }
}
- g_debug("%s: Appointment \"%s\" using alarm sound \"%s\"",
- G_STRFUNC, appointment.summary.c_str(), alarm_sound.c_str());
-
- return alarm_sound;
+ return uri;
}
} // unnamed namespace
@@ -481,7 +441,7 @@ void Snap::operator()(const Appointment& appointment,
// create a popup...
SoundBuilder sound_builder;
- sound_builder.set_filename(get_alarm_sound(appointment, m_settings));
+ sound_builder.set_uri(get_alarm_uri(appointment, m_settings));
sound_builder.set_volume(m_settings->alarm_volume.get());
sound_builder.set_clock(m_clock);
sound_builder.set_duration_minutes(m_settings->alarm_duration.get());