3 #include <glib/gi18n-lib.h>
4 #include <libchimara/glk.h>
5 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
7 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
10 #include "chimara-glk-private.h"
16 #define VOLUME_TIMER_RESOLUTION 1.0 /* In milliseconds */
18 #ifdef GSTREAMER_0_10_SOUND
19 #define OGG_MIMETYPE "application/ogg"
21 #ifdef GSTREAMER_1_0_SOUND
22 #define OGG_MIMETYPE "audio/ogg"
25 extern GPrivate glk_data_key;
27 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
28 /* Stop any currently playing sound on this channel, and remove any
29 format-specific GStreamer elements from the channel. */
31 clean_up_after_playing_sound(schanid_t chan)
33 if(!gst_element_set_state(chan->pipeline, GST_STATE_NULL))
34 WARNING_S(_("Could not set GstElement state to"), "NULL");
37 gst_bin_remove(GST_BIN(chan->pipeline), chan->source);
42 gst_bin_remove(GST_BIN(chan->pipeline), chan->demux);
47 gst_bin_remove(GST_BIN(chan->pipeline), chan->decode);
52 /* This signal is thrown whenever the GStreamer pipeline generates a message.
53 Most messages are harmless. */
55 on_pipeline_message(GstBus *bus, GstMessage *message, schanid_t s)
57 /* g_printerr("Got %s message\n", GST_MESSAGE_TYPE_NAME(message)); */
62 switch(GST_MESSAGE_TYPE(message)) {
63 case GST_MESSAGE_ERROR:
65 gst_message_parse_error(message, &err, &debug_message);
66 IO_WARNING(_("GStreamer error"), err->message, debug_message);
68 g_free(debug_message);
69 clean_up_after_playing_sound(s);
72 case GST_MESSAGE_WARNING:
74 gst_message_parse_warning(message, &err, &debug_message);
75 IO_WARNING(_("GStreamer warning"), err->message, debug_message);
77 g_free(debug_message);
80 case GST_MESSAGE_INFO:
82 gst_message_parse_info(message, &err, &debug_message);
83 g_message("GStreamer info \"%s\": %s", err->message, debug_message);
85 g_free(debug_message);
88 case GST_MESSAGE_EOS: /* End of stream */
89 /* Decrease repeats if not set to forever */
90 if(s->repeats != (glui32)-1)
93 if(!gst_element_seek_simple(s->pipeline, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT, 0)) {
94 WARNING(_("Could not execute GStreamer seek"));
95 clean_up_after_playing_sound(s);
98 clean_up_after_playing_sound(s);
99 /* Sound ended normally, send a notification if requested */
101 event_throw(s->glk, evtype_SoundNotify, NULL, s->resource, s->notify);
105 /* unhandled message */
110 /* This signal is thrown when the OGG demuxer element has decided what kind of
111 outputs it will output. We connect the decoder element dynamically. */
113 on_ogg_demuxer_pad_added(GstElement *demux, GstPad *pad, schanid_t s)
117 /* We can now link this pad with the vorbis-decoder sink pad */
118 sinkpad = gst_element_get_static_pad(s->decode, "sink");
119 if(gst_pad_link(pad, sinkpad) != GST_PAD_LINK_OK)
120 WARNING(_("Could not link OGG demuxer with Vorbis decoder"));
121 gst_object_unref(sinkpad);
124 /* This signal is thrown when the typefinder element has found the type of its
125 input. Now that we know what kind of input stream we have, we can connect the
126 proper demuxer/decoder elements. */
128 on_type_found(GstElement *typefind, guint probability, GstCaps *caps, schanid_t s)
130 gchar *type = gst_caps_to_string(caps);
131 if(strcmp(type, OGG_MIMETYPE) == 0) {
132 s->demux = gst_element_factory_make("oggdemux", NULL);
133 s->decode = gst_element_factory_make("vorbisdec", NULL);
134 if(!s->demux || !s->decode) {
135 WARNING(_("Could not create one or more GStreamer elements"));
138 gst_bin_add_many(GST_BIN(s->pipeline), s->demux, s->decode, NULL);
139 if(!gst_element_link(s->typefind, s->demux) || !gst_element_link(s->decode, s->convert)) {
140 WARNING(_("Could not link GStreamer elements"));
143 /* We link the demuxer and decoder together dynamically, since the
144 demuxer doesn't know what source pads it will have until it starts
145 demuxing the stream */
146 g_signal_connect(s->demux, "pad-added", G_CALLBACK(on_ogg_demuxer_pad_added), s);
147 } else if(strcmp(type, "audio/x-aiff") == 0) {
148 s->decode = gst_element_factory_make("aiffparse", NULL);
150 WARNING(_("Could not create 'aiffparse' GStreamer element"));
153 gst_bin_add(GST_BIN(s->pipeline), s->decode);
154 if(!gst_element_link_many(s->typefind, s->decode, s->convert, NULL)) {
155 WARNING(_("Could not link GStreamer elements"));
158 } else if(g_str_has_prefix(type, "audio/x-mod")) {
159 /* "audio/x-mod, type=(string)s3m" has been observed */
160 s->decode = gst_element_factory_make("modplug", NULL);
162 WARNING(_("Could not create 'modplug' GStreamer element"));
165 gst_bin_add(GST_BIN(s->pipeline), s->decode);
166 if(!gst_element_link_many(s->typefind, s->decode, s->convert, NULL)) {
167 WARNING(_("Could not link GStreamer elements"));
171 WARNING_S(_("Unexpected audio type in blorb"), type);
174 /* This is necessary in case this handler occurs in the middle of a state
176 gst_element_sync_state_with_parent(s->decode);
178 gst_element_sync_state_with_parent(s->demux);
184 /* Load a sound resource into a GInputStream, by whatever method */
185 static GInputStream *
186 load_resource_into_giostream(glui32 snd)
188 ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key);
189 GInputStream *retval;
191 if(glk_data->resource_map == NULL) {
192 if(glk_data->resource_load_callback == NULL) {
193 WARNING(_("No resource map has been loaded yet."));
196 char *filename = glk_data->resource_load_callback(CHIMARA_RESOURCE_SOUND, snd, glk_data->resource_load_callback_data);
197 if(filename == NULL) {
198 WARNING(_("Error loading resource from alternative location."));
203 GFile *file = g_file_new_for_path(filename);
204 retval = G_INPUT_STREAM(g_file_read(file, NULL, &err));
206 IO_WARNING(_("Error loading resource from file"), filename, err->message);
208 g_object_unref(file);
210 giblorb_result_t resource;
211 giblorb_err_t result = giblorb_load_resource(glk_data->resource_map, giblorb_method_Memory, &resource, giblorb_ID_Snd, snd);
212 if(result != giblorb_err_None) {
213 WARNING_S( _("Error loading resource"), giblorb_get_error_message(result) );
216 retval = g_memory_input_stream_new_from_data(resource.data.ptr, resource.length, NULL);
220 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
223 * glk_schannel_create:
224 * @rock: The rock value to give the new sound channel.
226 * This creates a sound channel, about as you'd expect.
228 * Remember that it is possible that the library will be unable to create a new
229 * channel, in which case glk_schannel_create() will return %NULL.
231 * When you create a channel using glk_schannel_create(), it has full volume,
232 * represented by the value 0x10000. Half volume would be 0x8000, three-quarters
233 * volume would be 0xC000, and so on. A volume of zero represents silence.
235 * You can overdrive the volume of a channel by setting a volume greater than
236 * 0x10000. However, this is not recommended; the library may be unable to
237 * increase the volume past full, or the sound may become distorted. You should
238 * always create sound resources with the maximum volume you will need, and then
239 * reduce the volume when appropriate using the channel-volume calls.
242 * Mathematically, these volume changes should be taken as linear
243 * multiplication of a waveform represented as linear samples. As I
244 * understand it, linear PCM encodes the sound pressure, and therefore a
245 * volume of 0x8000 should represent a 6 dB drop.
248 * Returns: A new sound channel, or %NULL.
251 glk_schannel_create(glui32 rock)
253 return glk_schannel_create_ext(rock, 0x10000);
257 * glk_schannel_create_ext:
258 * @rock: The rock value to give the new sound channel.
259 * @volume: Integer representing the volume; 0x10000 is 100%.
261 * The glk_schannel_create_ext() call lets you create a channel with the volume
262 * already set at a given level.
264 * Not all libraries support glk_schannel_create_ext(). You should test the
265 * %gestalt_Sound2 selector before you rely on it; see <link
266 * linkend="chimara-Testing-for-Sound-Capabilities">Testing for Sound
267 * Capabilities</link>.
269 * Returns: A new sound channel, or %NULL.
272 glk_schannel_create_ext(glui32 rock, glui32 volume)
274 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
275 ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key);
277 schanid_t s = g_new0(struct glk_schannel_struct, 1);
278 s->magic = MAGIC_SCHANNEL;
280 if(glk_data->register_obj)
281 s->disprock = (*glk_data->register_obj)(s, gidisp_Class_Schannel);
283 /* Add it to the global sound channel list */
284 glk_data->schannel_list = g_list_prepend(glk_data->schannel_list, s);
285 s->schannel_list = glk_data->schannel_list;
287 /* Add a pointer to the ChimaraGlk widget, for convenience */
288 s->glk = glk_data->self;
290 /* Create a GStreamer pipeline for the sound channel */
291 gchar *pipeline_name = g_strdup_printf("pipeline-%p", s);
292 s->pipeline = gst_pipeline_new(pipeline_name);
293 g_free(pipeline_name);
295 /* Watch for messages from the pipeline */
296 GstBus *bus = gst_pipeline_get_bus(GST_PIPELINE(s->pipeline));
297 gst_bus_add_signal_watch(bus);
298 g_signal_connect(bus, "message", G_CALLBACK(on_pipeline_message), s);
299 gst_object_unref(bus);
301 /* Create GStreamer elements to put in the pipeline */
302 s->typefind = gst_element_factory_make("typefind", NULL);
303 s->convert = gst_element_factory_make("audioconvert", NULL);
304 s->filter = gst_element_factory_make("volume", NULL);
305 s->sink = gst_element_factory_make("autoaudiosink", NULL);
306 if(!s->typefind || !s->convert || !s->filter || !s->sink) {
307 WARNING(_("Could not create one or more GStreamer elements"));
311 /* Set the initial volume */
312 glk_schannel_set_volume(s, volume);
314 /* Put the elements in the pipeline and link as many together as we can
315 without knowing the type of the audio stream */
316 gst_bin_add_many(GST_BIN(s->pipeline), s->typefind, s->convert, s->filter, s->sink, NULL);
318 /* Link elements: ??? -> Converter -> Volume filter -> Sink */
319 if(!gst_element_link_many(s->convert, s->filter, s->sink, NULL)) {
320 WARNING(_("Could not link GStreamer elements"));
323 g_signal_connect(s->typefind, "have-type", G_CALLBACK(on_type_found), s);
328 glk_schannel_destroy(s);
332 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
336 * glk_schannel_destroy:
337 * @chan: The sound channel to destroy.
339 * Destroys the channel. If the channel is playing a sound, the sound stops
340 * immediately (with no notification event).
343 glk_schannel_destroy(schanid_t chan)
345 VALID_SCHANNEL(chan, return);
347 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
348 ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key);
350 if(!gst_element_set_state(chan->pipeline, GST_STATE_NULL))
351 WARNING_S(_("Could not set GstElement state to"), "NULL");
353 glk_data->schannel_list = g_list_delete_link(glk_data->schannel_list, chan->schannel_list);
355 if(glk_data->unregister_obj)
357 (*glk_data->unregister_obj)(chan, gidisp_Class_Schannel, chan->disprock);
358 chan->disprock.ptr = NULL;
361 /* This also frees all the objects inside the pipeline */
363 gst_object_unref(chan->pipeline);
365 chan->magic = MAGIC_FREE;
367 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
371 * glk_schannel_iterate:
372 * @chan: A sound channel, or %NULL.
373 * @rockptr: Return location for the next sound channel's rock, or %NULL.
375 * This function can be used to iterate through the list of all open channels.
376 * See <link linkend="chimara-Iterating-Through-Opaque-Objects">Iterating
377 * Through Opaque Objects</link>.
379 * As that section describes, the order in which channels are returned is
382 * Returns: the next sound channel, or %NULL if there are no more.
385 glk_schannel_iterate(schanid_t chan, glui32 *rockptr)
387 VALID_SCHANNEL_OR_NULL(chan, return NULL);
389 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
390 ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key);
394 retnode = glk_data->schannel_list;
396 retnode = chan->schannel_list->next;
397 schanid_t retval = retnode? (schanid_t)retnode->data : NULL;
399 /* Store the sound channel's rock in rockptr */
400 if(retval && rockptr)
401 *rockptr = glk_schannel_get_rock(retval);
406 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
410 * glk_schannel_get_rock:
411 * @chan: A sound channel.
413 * Retrieves the channel's rock value. See <link
414 * linkend="chimara-Rocks">Rocks</link>.
416 * Returns: A rock value.
419 glk_schannel_get_rock(schanid_t chan)
421 VALID_SCHANNEL(chan, return 0);
427 * @chan: Channel to play the sound in.
428 * @snd: Resource number of the sound to play.
430 * Begins playing the given sound on the channel. If the channel was already
431 * playing a sound (even the same one), the old sound is stopped (with no
432 * notification event.
434 * This returns 1 if the sound actually started playing, and 0 if there was any
437 * The most obvious problem is if there is no sound resource with the given
438 * identifier. But other problems can occur. For example, the MOD-playing
439 * facility in a library might be unable to handle two MODs at the same time,
440 * in which case playing a MOD resource would fail if one was already playing.
443 * Returns: 1 on success, 0 on failure.
446 glk_schannel_play(schanid_t chan, glui32 snd)
448 return glk_schannel_play_ext(chan, snd, 1, 0);
452 * glk_schannel_play_ext:
453 * @chan: Channel to play the sound in.
454 * @snd: Resource number of the sound to play.
455 * @repeats: Number of times to repeat the sound.
456 * @notify: If nonzero, requests a notification when the sound is finished.
458 * This works the same as glk_schannel_play(), but lets you specify additional
459 * options. <code>glk_schannel_play(chan, snd)</code> is exactly equivalent to
460 * <code>glk_schannel_play_ext(chan, snd, 1, 0)</code>.
462 * The @repeats value is the number of times the sound should be repeated. A
463 * repeat value of -1 (or rather 0xFFFFFFFF) means that the sound should repeat
464 * forever. A repeat value of 0 means that the sound will not be played at all;
465 * nothing happens. (Although a previous sound on the channel will be stopped,
466 * and the function will return 1.)
468 * The @notify value should be nonzero in order to request a sound notification
469 * event. If you do this, when the sound is completed, you will get an event
470 * with type %evtype_SoundNotify. The @window will be %NULL, @val1 will be the
471 * sound's resource id, and @val2 will be the nonzero value you passed as
474 * If you request sound notification, and the repeat value is greater than one,
475 * you will get the event only after the last repetition. If the repeat value is
476 * 0 or -1, you will never get a notification event at all. Similarly, if the
477 * sound is stopped or interrupted, or if the channel is destroyed while the
478 * sound is playing, there will be no notification event.
480 * Not all libraries support sound notification. You should test the
481 * %gestalt_Sound2 selector before you rely on it; see <link
482 * linkend="chimara-Testing-for-Sound-Capabilities">Testing for Sound
483 * Capabilities</link>.
485 * Note that you can play a sound on a channel whose volume is zero. This has
486 * no audible result, unless you later change the volume; but it produces
487 * notifications as usual. You can also play a sound on a paused channel; the
488 * sound is paused immediately, and does not progress.
490 * Returns: 1 on success, 0 on failure.
493 glk_schannel_play_ext(schanid_t chan, glui32 snd, glui32 repeats, glui32 notify)
495 VALID_SCHANNEL(chan, return 0);
496 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
497 /* Stop the previous sound */
498 clean_up_after_playing_sound(chan);
500 /* Don't play if repeats = 0 */
506 GInputStream *stream = load_resource_into_giostream(snd);
510 chan->source = gst_element_factory_make("giostreamsrc", NULL);
511 g_object_set(chan->source, "stream", stream, NULL);
512 g_object_unref(stream); /* Now owned by GStreamer element */
513 gst_bin_add(GST_BIN(chan->pipeline), chan->source);
514 if(!gst_element_link(chan->source, chan->typefind)) {
515 WARNING(_("Could not link GStreamer elements"));
516 clean_up_after_playing_sound(chan);
520 chan->repeats = repeats;
521 chan->resource = snd;
522 chan->notify = notify;
524 /* Play the sound; unless the channel is paused, then pause it instead */
525 if(!gst_element_set_state(chan->pipeline, chan->paused? GST_STATE_PAUSED : GST_STATE_PLAYING)) {
526 WARNING_S(_("Could not set GstElement state to"), chan->paused? "PAUSED" : "PLAYING");
527 clean_up_after_playing_sound(chan);
533 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
537 * glk_schannel_play_multi:
538 * @chanarray: Array of #schanid_t structures.
539 * @chancount: Length of @chanarray.
540 * @sndarray: Array of sound resource numbers.
541 * @soundcount: Length of @sndarray, must be equal to @chanarray.
542 * @notify: If nonzero, request a notification when each sound finishes.
544 * This works the same as glk_schannel_play_ext(), except that you can specify
545 * more than one sound. The channel references and sound resource numbers are
546 * given as two arrays, which must be the same length. The @notify argument
547 * applies to all the sounds; the repeats value for all the sounds is 1.
549 * All the sounds will begin at exactly the same time.
551 * This returns the number of sounds that began playing correctly. (This will be
552 * a number from 0 to @soundcount.)
555 * If the @notify argument is nonzero, you will get a separate sound
556 * notification event as each sound finishes. They will all have the same
560 * Note that you have to supply @chancount and @soundcount as separate
561 * arguments, even though they are required to be the same. This is an awkward
562 * consequence of the way array arguments are dispatched in Glulx.
565 * Returns: The number of sounds that started playing correctly.
568 glk_schannel_play_multi(schanid_t *chanarray, glui32 chancount, glui32 *sndarray, glui32 soundcount, glui32 notify)
570 g_return_val_if_fail(chancount == soundcount, 0);
571 g_return_val_if_fail(chanarray != NULL || chancount == 0, 0);
572 g_return_val_if_fail(sndarray != NULL || soundcount == 0, 0);
575 for(count = 0; count < chancount; count++)
576 VALID_SCHANNEL(chanarray[count], return 0);
578 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
579 ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key);
580 if(!glk_data->resource_map && !glk_data->resource_load_callback) {
581 WARNING(_("No resource map has been loaded yet."));
585 /* We keep an array of sounds to skip if any of them have errors */
586 gboolean *skiparray = g_new0(gboolean, chancount);
588 /* Set up all the channels one by one */
589 for(count = 0; count < chancount; count++) {
590 /* Stop the previous sound */
591 clean_up_after_playing_sound(chanarray[count]);
593 GInputStream *stream = load_resource_into_giostream(sndarray[count]);
595 skiparray[count] = TRUE;
599 chanarray[count]->source = gst_element_factory_make("giostreamsrc", NULL);
600 g_object_set(chanarray[count]->source, "stream", stream, NULL);
601 g_object_unref(stream); /* Now owned by GStreamer element */
602 gst_bin_add(GST_BIN(chanarray[count]->pipeline), chanarray[count]->source);
603 if(!gst_element_link(chanarray[count]->source, chanarray[count]->typefind)) {
604 WARNING(_("Could not link GStreamer elements"));
605 clean_up_after_playing_sound(chanarray[count]);
608 chanarray[count]->repeats = 1;
609 chanarray[count]->resource = sndarray[count];
610 chanarray[count]->notify = notify;
613 /* Start all the sounds as close to each other as possible. */
614 /* FIXME: Is there a way to start them exactly at the same time? */
615 glui32 successes = 0;
616 for(count = 0; count < chancount; count++) {
619 /* Play the sound; unless the channel is paused, then pause it instead */
620 if(!gst_element_set_state(chanarray[count]->pipeline, chanarray[count]->paused? GST_STATE_PAUSED : GST_STATE_PLAYING)) {
621 WARNING_S(_("Could not set GstElement state to"), chanarray[count]->paused? "PAUSED" : "PLAYING");
622 skiparray[count] = TRUE;
623 clean_up_after_playing_sound(chanarray[count]);
632 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
637 * @chan: Channel to silence.
639 * Stops any sound playing in the channel. No notification event is generated,
640 * even if you requested one. If no sound is playing, this has no effect.
643 glk_schannel_stop(schanid_t chan)
645 VALID_SCHANNEL(chan, return);
646 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
647 clean_up_after_playing_sound(chan);
652 * glk_schannel_pause:
653 * @chan: Channel to pause.
655 * Pause any sound playing in the channel. This does not generate any
656 * notification events. If the channel is already paused, this does nothing.
658 * New sounds started in a paused channel are paused immediately.
660 * A volume change in progress is <emphasis>not</emphasis> paused, and may
661 * proceed to completion, generating a notification if appropriate.
664 glk_schannel_pause(schanid_t chan)
666 VALID_SCHANNEL(chan, return);
669 return; /* Silently do nothing */
671 /* Mark the channel as paused even if there is no sound playing yet */
674 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
676 if(gst_element_get_state(chan->pipeline, &state, NULL, GST_CLOCK_TIME_NONE) != GST_STATE_CHANGE_SUCCESS) {
677 WARNING(_("Could not get GstElement state"));
680 if(state != GST_STATE_PLAYING)
681 return; /* Silently do nothing if no sound is playing */
683 if(!gst_element_set_state(chan->pipeline, GST_STATE_PAUSED)) {
684 WARNING_S(_("Could not set GstElement state to"), "PAUSED");
687 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
691 * glk_schannel_unpause:
692 * @chan: Channel to unpause.
694 * Unpause the channel. Any paused sounds begin playing where they left off. If
695 * the channel is not already paused, this does nothing.
698 * This means, for example, that you can pause a channel that is currently
699 * not playing any sounds. If you then add a sound to the channel, it will
700 * not start playing; it will be paused at its beginning. If you later
701 * unpaise the channel, the sound will commence.
705 glk_schannel_unpause(schanid_t chan)
707 VALID_SCHANNEL(chan, return);
710 return; /* Silently do nothing */
712 /* Mark the channel as not paused in any case */
713 chan->paused = FALSE;
715 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
717 if(gst_element_get_state(chan->pipeline, &state, NULL, GST_CLOCK_TIME_NONE) != GST_STATE_CHANGE_SUCCESS) {
718 WARNING(_("Could not get GstElement state"));
721 if(state != GST_STATE_PAUSED)
722 return; /* Silently do nothing */
724 if(!gst_element_set_state(chan->pipeline, GST_STATE_PLAYING)) {
725 WARNING_S(_("Could not set GstElement state to"), "PLAYING");
728 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
732 * glk_schannel_set_volume:
733 * @chan: Channel to set the volume of.
734 * @vol: Integer representing the volume; 0x10000 is 100%.
736 * Sets the volume in the channel, from 0 (silence) to 0x10000 (full volume).
737 * Again, you can overdrive the volume by setting a value greater than 0x10000,
738 * but this is not recommended.
740 * The glk_schannel_set_volume() function does not include duration and notify
741 * values. Both are assumed to be zero: immediate change, no notification.
743 * You can call this function between sounds, or while a sound is playing.
744 * However, a zero-duration change while a sound is playing may produce
747 * At most one volume change can be occurring on a sound channel at any time.
748 * If you call this function while a previous volume change is in progress, the
749 * previous change is interrupted.
751 * Not all libraries support this function. You should test the
752 * %gestalt_SoundVolume selector before you rely on it; see <link
753 * linkend="chimara-Testing-for-Sound-Capabilities">Testing for Sound
754 * Capabilities</link>.
756 * <note><title>Chimara</title>
757 * <para>Chimara supports volumes from 0 to 1000%, that is, values of
758 * @vol up to 0xA0000.</para>
762 glk_schannel_set_volume(schanid_t chan, glui32 vol)
764 glk_schannel_set_volume_ext(chan, vol, 0, 0);
767 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
769 volume_glk_to_gstreamer(glui32 volume_glk)
771 return CLAMP(((double)volume_glk / 0x10000), 0.0, 10.0);
775 volume_change_timeout(schanid_t chan)
778 g_get_current_time(&now);
780 if(now.tv_sec >= chan->target_time_sec && now.tv_usec >= chan->target_time_usec) {
781 /* We're done - make sure the volume is at the requested level */
782 g_object_set(chan->filter, "volume", chan->target_volume, NULL);
784 if(chan->volume_notify)
785 event_throw(chan->glk, evtype_VolumeNotify, NULL, 0, chan->volume_notify);
787 chan->volume_timer_id = 0;
791 /* Calculate the appropriate step every time - a busy system may delay or
792 * drop timer ticks */
793 double time_left_msec = (chan->target_time_sec - now.tv_sec) * 1000.0
794 + (chan->target_time_usec - now.tv_usec) / 1000.0;
795 double steps_left = time_left_msec / VOLUME_TIMER_RESOLUTION;
796 double current_volume;
797 g_object_get(chan->filter, "volume", ¤t_volume, NULL);
798 double volume_step = (chan->target_volume - current_volume) / steps_left;
800 g_object_set(chan->filter, "volume", current_volume + volume_step, NULL);
804 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
807 * glk_schannel_set_volume_ext:
808 * @chan: Channel to set the volume of.
809 * @vol: Integer representing the volume; 0x10000 is 100%.
810 * @duration: Length of volume change in milliseconds, or 0 for immediate.
811 * @notify: If nonzero, requests a notification when the volume change finishes.
813 * Sets the volume in the channel, from 0 (silence) to 0x10000 (full volume).
814 * Again, you can overdrive the volume by setting a value greater than 0x10000,
815 * but this is not recommended.
817 * If the @duration is zero, the change is immediate. Otherwise, the change
818 * begins immediately, and occurs smoothly over the next @duration milliseconds.
820 * The @notify value should be nonzero in order to request a volume notification
821 * event. If you do this, when the volume change is completed, you will get an
822 * event with type #evtype_VolumeNotify. The window will be %NULL, @val1 will be
823 * zero, and @val2 will be the nonzero value you passed as @notify.
825 * You can call this function between sounds, or while a sound is playing.
826 * However, a zero-duration change while a sound is playing may produce
829 * At most one volume change can be occurring on a sound channel at any time. If
830 * you call this function while a previous volume change is in progress, the
831 * previous change is interrupted. The beginning point of the new volume change
832 * should be wherever the previous volume change was interrupted (rather than
833 * the previous change's beginning or ending point).
835 * Not all libraries support these functions. You should test the appropriate
836 * gestalt selectors before you rely on them; see "Testing for Sound
840 glk_schannel_set_volume_ext(schanid_t chan, glui32 vol, glui32 duration, glui32 notify)
842 VALID_SCHANNEL(chan, return);
843 /* Silently ignore out-of-range volume values */
845 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
846 /* Interrupt a previous volume change */
847 if(chan->volume_timer_id > 0)
848 g_source_remove(chan->volume_timer_id);
850 double target_volume = volume_glk_to_gstreamer(vol);
853 g_object_set(chan->filter, "volume", target_volume, NULL);
856 event_throw(chan->glk, evtype_VolumeNotify, NULL, 0, notify);
861 GTimeVal target_time;
862 g_get_current_time(&target_time);
863 g_time_val_add(&target_time, (long)duration * 1000);
865 chan->target_volume = target_volume;
866 chan->target_time_sec = target_time.tv_sec;
867 chan->target_time_usec = target_time.tv_usec;
868 chan->volume_notify = notify;
870 /* Set up a timer for the volume */
871 chan->volume_timer_id = g_timeout_add(VOLUME_TIMER_RESOLUTION, (GSourceFunc)volume_change_timeout, chan);
872 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
876 * glk_sound_load_hint:
877 * @snd: Resource number of a sound.
878 * @flag: Nonzero to tell the library to load the sound, zero to tell the
879 * library to unload it.
881 * This gives the library a hint about whether the given sound should be loaded
882 * or not. If the @flag is nonzero, the library may preload the sound or do
883 * other initialization, so that glk_schannel_play() will be faster. If the
884 * @flag is zero, the library may release memory or other resources associated
885 * with the sound. Calling this function is always optional, and it has no
886 * effect on what the library actually plays.
889 glk_sound_load_hint(glui32 snd, glui32 flag)
891 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
892 ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key);
893 giblorb_result_t resource;
894 giblorb_err_t result;
896 /* Sound load hints only work for Blorb resource maps */
897 if(!glk_data->resource_map)
901 /* The sound load hint simply loads the resource from the resource map;
902 loading a chunk more than once does nothing */
903 result = giblorb_load_resource(glk_data->resource_map, giblorb_method_Memory, &resource, giblorb_ID_Snd, snd);
904 if(result != giblorb_err_None) {
905 WARNING_S( _("Error loading resource"), giblorb_get_error_message(result) );
909 /* Get the Blorb chunk number by loading the resource with
910 method_DontLoad, then unload that chunk - has no effect if the chunk
912 result = giblorb_load_resource(glk_data->resource_map, giblorb_method_DontLoad, &resource, giblorb_ID_Snd, snd);
913 if(result != giblorb_err_None) {
914 WARNING_S( _("Error loading resource"), giblorb_get_error_message(result) );
917 result = giblorb_unload_chunk(glk_data->resource_map, resource.chunknum);
918 if(result != giblorb_err_None) {
919 WARNING_S( _("Error unloading chunk"), giblorb_get_error_message(result) );
923 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */