From 88bd3ce92004750c2689537cf1fa9a8211ad9189 Mon Sep 17 00:00:00 2001
From: Philip Chimento <philip.chimento@gmail.com>
Date: Wed, 6 Jul 2011 22:57:15 +0200
Subject: [PATCH] Start implementing new sound API

glk_schannel_create_ext()
glk_schannel_pause()
glk_schannel_unpause()
---
 libchimara/schannel.c | 55 ++++++++++++++++++++++++++++++++++++++++---
 libchimara/schannel.h |  4 +++-
 2 files changed, 55 insertions(+), 4 deletions(-)

diff --git a/libchimara/schannel.c b/libchimara/schannel.c
index 5432436..373a9af 100644
--- a/libchimara/schannel.c
+++ b/libchimara/schannel.c
@@ -174,6 +174,24 @@ finally:
  */
 schanid_t 
 glk_schannel_create(glui32 rock)
+{
+	return glk_schannel_create_ext(rock, 0x10000);
+}
+
+/**
+ * glk_schannel_create_ext:
+ * @rock: The rock value to give the new sound channel.
+ * @volume: Integer representing the volume; 0x10000 is 100&percnt;.
+ *
+ * [DRAFT SPEC]
+ *
+ * The glk_schannel_create_ext() call lets you create a channel with the volume
+ * already set at a given level.
+ *
+ * Returns: A new sound channel, or %NULL.
+ */
+schanid_t
+glk_schannel_create_ext(glui32 rock, glui32 volume)
 {
 #ifdef GSTREAMER_SOUND
 	ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
@@ -213,6 +231,9 @@ glk_schannel_create(glui32 rock)
 		goto fail;
 	}
 
+	/* Set the initial volume */
+	glk_schannel_set_volume(s, volume);
+
 	/* Put the elements in the pipeline and link as many together as we can
 	 without knowing the type of the audio stream */
 	gst_bin_add_many(GST_BIN(s->pipeline), s->source, s->typefind, s->convert, s->filter, s->sink, NULL);
@@ -530,7 +551,21 @@ glk_schannel_pause(schanid_t chan)
 {
 	VALID_SCHANNEL(chan, return);
 
-	/* Not implemented */
+	if(chan->paused)
+		return; /* Silently do nothing */
+	GstState state;
+	if(gst_element_get_state(chan->pipeline, &state, NULL, GST_CLOCK_TIME_NONE) != GST_STATE_CHANGE_SUCCESS) {
+		WARNING(_("Could not get GstElement state"));
+		return;
+	}
+	if(state != GST_STATE_PLAYING)
+		return; /* Silently do nothing if no sound is playing */
+
+	if(!gst_element_set_state(chan->pipeline, GST_STATE_PAUSED)) {
+		WARNING_S(_("Could not set GstElement state to"), "PAUSED");
+		return;
+	}
+	chan->paused = TRUE;
 }
 
 /**
@@ -547,7 +582,22 @@ glk_schannel_unpause(schanid_t chan)
 {
 	VALID_SCHANNEL(chan, return);
 
-	/* Not implemented */
+	if(!chan->paused)
+		return; /* Silently do nothing */
+
+	GstState state;
+	if(gst_element_get_state(chan->pipeline, &state, NULL, GST_CLOCK_TIME_NONE) != GST_STATE_CHANGE_SUCCESS) {
+		WARNING(_("Could not get GstElement state"));
+		return;
+	}
+	if(state != GST_STATE_PAUSED)
+		return; /* Silently do nothing */
+
+	if(!gst_element_set_state(chan->pipeline, GST_STATE_PLAYING)) {
+		WARNING_S(_("Could not set GstElement state to"), "PLAYING");
+		return;
+	}
+	chan->paused = FALSE;
 }
 
 /**
@@ -631,7 +681,6 @@ glk_schannel_set_volume_ext(schanid_t chan, glui32 vol, glui32 duration, glui32
 	
 #ifdef GSTREAMER_SOUND
 	gdouble volume_gst = (gdouble)vol / 0x10000;
-	g_printerr("Volume set to: %f\n", volume_gst);
 	g_object_set(chan->filter, "volume", CLAMP(volume_gst, 0.0, 10.0), NULL);
 #endif
 
diff --git a/libchimara/schannel.h b/libchimara/schannel.h
index 465e7dc..dd77f1a 100644
--- a/libchimara/schannel.h
+++ b/libchimara/schannel.h
@@ -25,6 +25,8 @@ struct glk_schannel_struct
 	glui32 resource, notify;
 	/* How many times to repeat the last sound played (-1 = forever) */
 	glui32 repeats;
+	/* Whether channel is paused */
+	gboolean paused;
 	
 #ifdef GSTREAMER_SOUND
 	/* Each sound channel is represented as a GStreamer pipeline.  */
@@ -32,4 +34,4 @@ struct glk_schannel_struct
 #endif
 };
 
-#endif
\ No newline at end of file
+#endif
-- 
2.30.2