Implement alternative resource loading for sound

[projects/chimara/chimara.git] / libchimara / schannel.c

diff --git a/libchimara/schannel.c b/libchimara/schannel.c
index 036c76094b4b1939373d7f6ca4e382ba90cef6a3..93146b1ed843db80046aa8a8f30e9235e7df66a5 100644 (file)
--- a/libchimara/schannel.c
+++ b/libchimara/schannel.c
@@ -70,9 +70,18 @@ on_pipeline_message(GstBus *bus, GstMessage *message, schanid_t s)
                g_free(debug_message);
        }
                break;
-       case GST_MESSAGE_EOS:
-               /* end-of-stream */
-               clean_up_after_playing_sound(s);
+       case GST_MESSAGE_EOS: /* End of stream */
+               /* Decrease repeats if not set to forever */
+               if(s->repeats != (glui32)-1)
+                       s->repeats--;
+               if(s->repeats > 0) {
+                       if(!gst_element_seek_simple(s->pipeline, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT, 0)) {
+                               WARNING(_("Could not execute GStreamer seek"));
+                               clean_up_after_playing_sound(s);
+                       }
+               } else {
+                       clean_up_after_playing_sound(s);
+               }
                break;
        default:
                /* unhandled message */
@@ -371,28 +380,54 @@ glui32
 glk_schannel_play_ext(schanid_t chan, glui32 snd, glui32 repeats, glui32 notify)
 {
        VALID_SCHANNEL(chan, return 0);
-#ifdef GSTREAMER_SOUND 
+       g_printerr("Play sound %d with repeats %d and notify %d\n", snd, repeats, notify);
+#ifdef GSTREAMER_SOUND
        ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
+       GInputStream *stream;
 
        /* Stop the previous sound */
        clean_up_after_playing_sound(chan);
-       
+
+       /* Don't play if repeats = 0 */
+       if(repeats == 0) {
+               chan->repeats = 0;
+               return 1;
+       }
+
+       /* Load the sound into a GInputStream, by whatever method */
        if(!glk_data->resource_map) {
                if(!glk_data->resource_load_callback) {
                        WARNING(_("No resource map has been loaded yet."));
                        return 0;
                }
-               WARNING(_("Loading sound resources from alternative location not yet supported."));
-               return 0;
-       }
-       
-       giblorb_result_t resource;
-       giblorb_err_t result = giblorb_load_resource(glk_data->resource_map, giblorb_method_Memory, &resource, giblorb_ID_Snd, snd);
-       if(result != giblorb_err_None) {
-               WARNING_S( _("Error loading resource"), giblorb_get_error_message(result) );
-               return 0;
+               gchar *filename = glk_data->resource_load_callback(CHIMARA_RESOURCE_SOUND, snd, glk_data->resource_load_callback_data);
+               if(!filename) {
+                       WARNING(_("Error loading resource from alternative location."));
+                       return 0;
+               }
+
+               GError *err = NULL;
+               GFile *file = g_file_new_for_path(filename);
+               stream = G_INPUT_STREAM(g_file_read(file, NULL, &err));
+               if(!stream) {
+                       IO_WARNING(_("Error loading resource from file"), filename, err->message);
+                       g_free(filename);
+                       g_object_unref(file);
+                       return 0;
+               }
+               g_free(filename);
+               g_object_unref(file);
+       } else {
+               giblorb_result_t resource;
+               giblorb_err_t result = giblorb_load_resource(glk_data->resource_map, giblorb_method_Memory, &resource, giblorb_ID_Snd, snd);
+               if(result != giblorb_err_None) {
+                       WARNING_S( _("Error loading resource"), giblorb_get_error_message(result) );
+                       return 0;
+               }
+               stream = g_memory_input_stream_new_from_data(resource.data.ptr, resource.length, NULL);
        }
-       GInputStream *stream = g_memory_input_stream_new_from_data(resource.data.ptr, resource.length, NULL);
+
+       chan->repeats = repeats;
        g_object_set(chan->source, "stream", stream, NULL);
        
        if(!gst_element_set_state(chan->pipeline, GST_STATE_PLAYING)) {
@@ -473,10 +508,41 @@ glk_schannel_set_volume(schanid_t chan, glui32 vol)
  * @flag is zero, the library may release memory or other resources associated
  * with the sound. Calling this function is always optional, and it has no
  * effect on what the library actually plays.
- *
- * <warning><para>This function is not implemented yet.</para></warning>
  */
 void 
 glk_sound_load_hint(glui32 snd, glui32 flag)
 {
+#ifdef GSTREAMER_SOUND
+       ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
+       giblorb_result_t resource;
+       giblorb_err_t result;
+
+       /* Sound load hints only work for Blorb resource maps */
+       if(!glk_data->resource_map)
+               return;
+
+       if(flag) {
+               /* The sound load hint simply loads the resource from the resource map;
+                loading a chunk more than once does nothing */
+               result = giblorb_load_resource(glk_data->resource_map, giblorb_method_Memory, &resource, giblorb_ID_Snd, snd);
+               if(result != giblorb_err_None) {
+                       WARNING_S( _("Error loading resource"), giblorb_get_error_message(result) );
+                       return;
+               }
+       } else {
+               /* Get the Blorb chunk number by loading the resource with
+                method_DontLoad, then unload that chunk - has no effect if the chunk
+                isn't loaded */
+               result = giblorb_load_resource(glk_data->resource_map, giblorb_method_DontLoad, &resource, giblorb_ID_Snd, snd);
+               if(result != giblorb_err_None) {
+                       WARNING_S( _("Error loading resource"), giblorb_get_error_message(result) );
+                       return;
+               }
+               result = giblorb_unload_chunk(glk_data->resource_map, resource.chunknum);
+               if(result != giblorb_err_None) {
+                       WARNING_S( _("Error unloading chunk"), giblorb_get_error_message(result) );
+                       return;
+               }
+       }
+#endif /* GSTREAMER_SOUND */
 }