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(strcmp(type, "audio/x-mod") == 0) {
159 s->decode = gst_element_factory_make("modplug", NULL);
161 WARNING(_("Could not create 'modplug' GStreamer element"));
164 gst_bin_add(GST_BIN(s->pipeline), s->decode);
165 if(!gst_element_link_many(s->typefind, s->decode, s->convert, NULL)) {
166 WARNING(_("Could not link GStreamer elements"));
170 WARNING_S(_("Unexpected audio type in blorb"), type);
176 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
179 * glk_schannel_create:
180 * @rock: The rock value to give the new sound channel.
182 * This creates a sound channel, about as you'd expect.
184 * Remember that it is possible that the library will be unable to create a new
185 * channel, in which case glk_schannel_create() will return %NULL.
187 * When you create a channel using glk_schannel_create(), it has full volume,
188 * represented by the value 0x10000. Half volume would be 0x8000, three-quarters
189 * volume would be 0xC000, and so on. A volume of zero represents silence.
191 * You can overdrive the volume of a channel by setting a volume greater than
192 * 0x10000. However, this is not recommended; the library may be unable to
193 * increase the volume past full, or the sound may become distorted. You should
194 * always create sound resources with the maximum volume you will need, and then
195 * reduce the volume when appropriate using the channel-volume calls.
198 * Mathematically, these volume changes should be taken as linear
199 * multiplication of a waveform represented as linear samples. As I
200 * understand it, linear PCM encodes the sound pressure, and therefore a
201 * volume of 0x8000 should represent a 6 dB drop.
204 * Returns: A new sound channel, or %NULL.
207 glk_schannel_create(glui32 rock)
209 return glk_schannel_create_ext(rock, 0x10000);
213 * glk_schannel_create_ext:
214 * @rock: The rock value to give the new sound channel.
215 * @volume: Integer representing the volume; 0x10000 is 100%.
217 * The glk_schannel_create_ext() call lets you create a channel with the volume
218 * already set at a given level.
220 * Not all libraries support glk_schannel_create_ext(). You should test the
221 * %gestalt_Sound2 selector before you rely on it; see <link
222 * linkend="chimara-Testing-for-Sound-Capabilities">Testing for Sound
223 * Capabilities</link>.
225 * Returns: A new sound channel, or %NULL.
228 glk_schannel_create_ext(glui32 rock, glui32 volume)
230 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
231 ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key);
233 schanid_t s = g_new0(struct glk_schannel_struct, 1);
234 s->magic = MAGIC_SCHANNEL;
236 if(glk_data->register_obj)
237 s->disprock = (*glk_data->register_obj)(s, gidisp_Class_Schannel);
239 /* Add it to the global sound channel list */
240 glk_data->schannel_list = g_list_prepend(glk_data->schannel_list, s);
241 s->schannel_list = glk_data->schannel_list;
243 /* Add a pointer to the ChimaraGlk widget, for convenience */
244 s->glk = glk_data->self;
246 /* Create a GStreamer pipeline for the sound channel */
247 gchar *pipeline_name = g_strdup_printf("pipeline-%p", s);
248 s->pipeline = gst_pipeline_new(pipeline_name);
249 g_free(pipeline_name);
251 /* Watch for messages from the pipeline */
252 GstBus *bus = gst_pipeline_get_bus(GST_PIPELINE(s->pipeline));
253 gst_bus_add_signal_watch(bus);
254 g_signal_connect(bus, "message", G_CALLBACK(on_pipeline_message), s);
255 gst_object_unref(bus);
257 /* Create GStreamer elements to put in the pipeline */
258 s->typefind = gst_element_factory_make("typefind", NULL);
259 s->convert = gst_element_factory_make("audioconvert", NULL);
260 s->filter = gst_element_factory_make("volume", NULL);
261 s->sink = gst_element_factory_make("autoaudiosink", NULL);
262 if(!s->typefind || !s->convert || !s->filter || !s->sink) {
263 WARNING(_("Could not create one or more GStreamer elements"));
267 /* Set the initial volume */
268 glk_schannel_set_volume(s, volume);
270 /* Put the elements in the pipeline and link as many together as we can
271 without knowing the type of the audio stream */
272 gst_bin_add_many(GST_BIN(s->pipeline), s->typefind, s->convert, s->filter, s->sink, NULL);
274 /* Link elements: ??? -> Converter -> Volume filter -> Sink */
275 if(!gst_element_link_many(s->convert, s->filter, s->sink, NULL)) {
276 WARNING(_("Could not link GStreamer elements"));
279 g_signal_connect(s->typefind, "have-type", G_CALLBACK(on_type_found), s);
284 glk_schannel_destroy(s);
288 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
292 * glk_schannel_destroy:
293 * @chan: The sound channel to destroy.
295 * Destroys the channel. If the channel is playing a sound, the sound stops
296 * immediately (with no notification event).
299 glk_schannel_destroy(schanid_t chan)
301 VALID_SCHANNEL(chan, return);
303 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
304 ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key);
306 if(!gst_element_set_state(chan->pipeline, GST_STATE_NULL))
307 WARNING_S(_("Could not set GstElement state to"), "NULL");
309 glk_data->schannel_list = g_list_delete_link(glk_data->schannel_list, chan->schannel_list);
311 if(glk_data->unregister_obj)
313 (*glk_data->unregister_obj)(chan, gidisp_Class_Schannel, chan->disprock);
314 chan->disprock.ptr = NULL;
317 /* This also frees all the objects inside the pipeline */
319 gst_object_unref(chan->pipeline);
321 chan->magic = MAGIC_FREE;
323 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
327 * glk_schannel_iterate:
328 * @chan: A sound channel, or %NULL.
329 * @rockptr: Return location for the next sound channel's rock, or %NULL.
331 * This function can be used to iterate through the list of all open channels.
332 * See <link linkend="chimara-Iterating-Through-Opaque-Objects">Iterating
333 * Through Opaque Objects</link>.
335 * As that section describes, the order in which channels are returned is
338 * Returns: the next sound channel, or %NULL if there are no more.
341 glk_schannel_iterate(schanid_t chan, glui32 *rockptr)
343 VALID_SCHANNEL_OR_NULL(chan, return NULL);
345 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
346 ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key);
350 retnode = glk_data->schannel_list;
352 retnode = chan->schannel_list->next;
353 schanid_t retval = retnode? (schanid_t)retnode->data : NULL;
355 /* Store the sound channel's rock in rockptr */
356 if(retval && rockptr)
357 *rockptr = glk_schannel_get_rock(retval);
362 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
366 * glk_schannel_get_rock:
367 * @chan: A sound channel.
369 * Retrieves the channel's rock value. See <link
370 * linkend="chimara-Rocks">Rocks</link>.
372 * Returns: A rock value.
375 glk_schannel_get_rock(schanid_t chan)
377 VALID_SCHANNEL(chan, return 0);
383 * @chan: Channel to play the sound in.
384 * @snd: Resource number of the sound to play.
386 * Begins playing the given sound on the channel. If the channel was already
387 * playing a sound (even the same one), the old sound is stopped (with no
388 * notification event.
390 * This returns 1 if the sound actually started playing, and 0 if there was any
393 * The most obvious problem is if there is no sound resource with the given
394 * identifier. But other problems can occur. For example, the MOD-playing
395 * facility in a library might be unable to handle two MODs at the same time,
396 * in which case playing a MOD resource would fail if one was already playing.
399 * Returns: 1 on success, 0 on failure.
402 glk_schannel_play(schanid_t chan, glui32 snd)
404 return glk_schannel_play_ext(chan, snd, 1, 0);
408 * glk_schannel_play_ext:
409 * @chan: Channel to play the sound in.
410 * @snd: Resource number of the sound to play.
411 * @repeats: Number of times to repeat the sound.
412 * @notify: If nonzero, requests a notification when the sound is finished.
414 * This works the same as glk_schannel_play(), but lets you specify additional
415 * options. <code>glk_schannel_play(chan, snd)</code> is exactly equivalent to
416 * <code>glk_schannel_play_ext(chan, snd, 1, 0)</code>.
418 * The @repeats value is the number of times the sound should be repeated. A
419 * repeat value of -1 (or rather 0xFFFFFFFF) means that the sound should repeat
420 * forever. A repeat value of 0 means that the sound will not be played at all;
421 * nothing happens. (Although a previous sound on the channel will be stopped,
422 * and the function will return 1.)
424 * The @notify value should be nonzero in order to request a sound notification
425 * event. If you do this, when the sound is completed, you will get an event
426 * with type %evtype_SoundNotify. The @window will be %NULL, @val1 will be the
427 * sound's resource id, and @val2 will be the nonzero value you passed as
430 * If you request sound notification, and the repeat value is greater than one,
431 * you will get the event only after the last repetition. If the repeat value is
432 * 0 or -1, you will never get a notification event at all. Similarly, if the
433 * sound is stopped or interrupted, or if the channel is destroyed while the
434 * sound is playing, there will be no notification event.
436 * Not all libraries support sound notification. You should test the
437 * %gestalt_Sound2 selector before you rely on it; see <link
438 * linkend="chimara-Testing-for-Sound-Capabilities">Testing for Sound
439 * Capabilities</link>.
441 * Note that you can play a sound on a channel whose volume is zero. This has
442 * no audible result, unless you later change the volume; but it produces
443 * notifications as usual. You can also play a sound on a paused channel; the
444 * sound is paused immediately, and does not progress.
446 * Returns: 1 on success, 0 on failure.
449 glk_schannel_play_ext(schanid_t chan, glui32 snd, glui32 repeats, glui32 notify)
451 VALID_SCHANNEL(chan, return 0);
452 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
453 ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key);
454 GInputStream *stream;
456 /* Stop the previous sound */
457 clean_up_after_playing_sound(chan);
459 /* Don't play if repeats = 0 */
465 /* Load the sound into a GInputStream, by whatever method */
466 if(!glk_data->resource_map) {
467 if(!glk_data->resource_load_callback) {
468 WARNING(_("No resource map has been loaded yet."));
471 gchar *filename = glk_data->resource_load_callback(CHIMARA_RESOURCE_SOUND, snd, glk_data->resource_load_callback_data);
473 WARNING(_("Error loading resource from alternative location."));
478 GFile *file = g_file_new_for_path(filename);
479 stream = G_INPUT_STREAM(g_file_read(file, NULL, &err));
481 IO_WARNING(_("Error loading resource from file"), filename, err->message);
483 g_object_unref(file);
487 g_object_unref(file);
489 giblorb_result_t resource;
490 giblorb_err_t result = giblorb_load_resource(glk_data->resource_map, giblorb_method_Memory, &resource, giblorb_ID_Snd, snd);
491 if(result != giblorb_err_None) {
492 WARNING_S( _("Error loading resource"), giblorb_get_error_message(result) );
495 stream = g_memory_input_stream_new_from_data(resource.data.ptr, resource.length, NULL);
498 chan->source = gst_element_factory_make("giostreamsrc", NULL);
499 g_object_set(chan->source, "stream", stream, NULL);
500 g_object_unref(stream); /* Now owned by GStreamer element */
501 gst_bin_add(GST_BIN(chan->pipeline), chan->source);
502 if(!gst_element_link(chan->source, chan->typefind)) {
503 WARNING(_("Could not link GStreamer elements"));
504 clean_up_after_playing_sound(chan);
508 chan->repeats = repeats;
509 chan->resource = snd;
510 chan->notify = notify;
512 /* Play the sound; unless the channel is paused, then pause it instead */
513 if(!gst_element_set_state(chan->pipeline, chan->paused? GST_STATE_PAUSED : GST_STATE_PLAYING)) {
514 WARNING_S(_("Could not set GstElement state to"), chan->paused? "PAUSED" : "PLAYING");
515 clean_up_after_playing_sound(chan);
521 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
525 * glk_schannel_play_multi:
526 * @chanarray: Array of #schanid_t structures.
527 * @chancount: Length of @chanarray.
528 * @sndarray: Array of sound resource numbers.
529 * @soundcount: Length of @sndarray, must be equal to @chanarray.
530 * @notify: If nonzero, request a notification when each sound finishes.
532 * This works the same as glk_schannel_play_ext(), except that you can specify
533 * more than one sound. The channel references and sound resource numbers are
534 * given as two arrays, which must be the same length. The @notify argument
535 * applies to all the sounds; the repeats value for all the sounds is 1.
537 * All the sounds will begin at exactly the same time.
539 * This returns the number of sounds that began playing correctly. (This will be
540 * a number from 0 to @soundcount.)
543 * If the @notify argument is nonzero, you will get a separate sound
544 * notification event as each sound finishes. They will all have the same
548 * Note that you have to supply @chancount and @soundcount as separate
549 * arguments, even though they are required to be the same. This is an awkward
550 * consequence of the way array arguments are dispatched in Glulx.
553 * Returns: The number of sounds that started playing correctly.
556 glk_schannel_play_multi(schanid_t *chanarray, glui32 chancount, glui32 *sndarray, glui32 soundcount, glui32 notify)
558 g_return_val_if_fail(chancount == soundcount, 0);
559 g_return_val_if_fail(chanarray != NULL || chancount == 0, 0);
560 g_return_val_if_fail(sndarray != NULL || soundcount == 0, 0);
563 for(count = 0; count < chancount; count++)
564 VALID_SCHANNEL(chanarray[count], return 0);
566 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
567 ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key);
568 GInputStream *stream;
570 if(!glk_data->resource_map && !glk_data->resource_load_callback) {
571 WARNING(_("No resource map has been loaded yet."));
575 /* We keep an array of sounds to skip if any of them have errors */
576 gboolean *skiparray = g_new0(gboolean, chancount);
578 /* Set up all the channels one by one */
579 for(count = 0; count < chancount; count++) {
580 /* Stop the previous sound */
581 clean_up_after_playing_sound(chanarray[count]);
583 /* Load the sound into a GInputStream, by whatever method */
584 if(!glk_data->resource_map) {
585 gchar *filename = glk_data->resource_load_callback(CHIMARA_RESOURCE_SOUND, sndarray[count], glk_data->resource_load_callback_data);
587 WARNING(_("Error loading resource from alternative location."));
588 skiparray[count] = TRUE;
593 GFile *file = g_file_new_for_path(filename);
594 stream = G_INPUT_STREAM(g_file_read(file, NULL, &err));
596 IO_WARNING(_("Error loading resource from file"), filename, err->message);
598 g_object_unref(file);
599 skiparray[count] = TRUE;
603 g_object_unref(file);
605 giblorb_result_t resource;
606 giblorb_err_t result = giblorb_load_resource(glk_data->resource_map, giblorb_method_Memory, &resource, giblorb_ID_Snd, sndarray[count]);
607 if(result != giblorb_err_None) {
608 WARNING_S( _("Error loading resource"), giblorb_get_error_message(result) );
609 skiparray[count] = TRUE;
612 stream = g_memory_input_stream_new_from_data(resource.data.ptr, resource.length, NULL);
615 chanarray[count]->source = gst_element_factory_make("giostreamsrc", NULL);
616 g_object_set(chanarray[count]->source, "stream", stream, NULL);
617 g_object_unref(stream); /* Now owned by GStreamer element */
618 gst_bin_add(GST_BIN(chanarray[count]->pipeline), chanarray[count]->source);
619 if(!gst_element_link(chanarray[count]->source, chanarray[count]->typefind)) {
620 WARNING(_("Could not link GStreamer elements"));
621 clean_up_after_playing_sound(chanarray[count]);
624 chanarray[count]->repeats = 1;
625 chanarray[count]->resource = sndarray[count];
626 chanarray[count]->notify = notify;
629 /* Start all the sounds as close to each other as possible. */
630 /* FIXME: Is there a way to start them exactly at the same time? */
631 glui32 successes = 0;
632 for(count = 0; count < chancount; count++) {
635 /* Play the sound; unless the channel is paused, then pause it instead */
636 if(!gst_element_set_state(chanarray[count]->pipeline, chanarray[count]->paused? GST_STATE_PAUSED : GST_STATE_PLAYING)) {
637 WARNING_S(_("Could not set GstElement state to"), chanarray[count]->paused? "PAUSED" : "PLAYING");
638 skiparray[count] = TRUE;
639 clean_up_after_playing_sound(chanarray[count]);
648 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
653 * @chan: Channel to silence.
655 * Stops any sound playing in the channel. No notification event is generated,
656 * even if you requested one. If no sound is playing, this has no effect.
659 glk_schannel_stop(schanid_t chan)
661 VALID_SCHANNEL(chan, return);
662 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
663 clean_up_after_playing_sound(chan);
668 * glk_schannel_pause:
669 * @chan: Channel to pause.
671 * Pause any sound playing in the channel. This does not generate any
672 * notification events. If the channel is already paused, this does nothing.
674 * New sounds started in a paused channel are paused immediately.
676 * A volume change in progress is <emphasis>not</emphasis> paused, and may
677 * proceed to completion, generating a notification if appropriate.
680 glk_schannel_pause(schanid_t chan)
682 VALID_SCHANNEL(chan, return);
685 return; /* Silently do nothing */
687 /* Mark the channel as paused even if there is no sound playing yet */
690 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
692 if(gst_element_get_state(chan->pipeline, &state, NULL, GST_CLOCK_TIME_NONE) != GST_STATE_CHANGE_SUCCESS) {
693 WARNING(_("Could not get GstElement state"));
696 if(state != GST_STATE_PLAYING)
697 return; /* Silently do nothing if no sound is playing */
699 if(!gst_element_set_state(chan->pipeline, GST_STATE_PAUSED)) {
700 WARNING_S(_("Could not set GstElement state to"), "PAUSED");
703 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
707 * glk_schannel_unpause:
708 * @chan: Channel to unpause.
710 * Unpause the channel. Any paused sounds begin playing where they left off. If
711 * the channel is not already paused, this does nothing.
714 * This means, for example, that you can pause a channel that is currently
715 * not playing any sounds. If you then add a sound to the channel, it will
716 * not start playing; it will be paused at its beginning. If you later
717 * unpaise the channel, the sound will commence.
721 glk_schannel_unpause(schanid_t chan)
723 VALID_SCHANNEL(chan, return);
726 return; /* Silently do nothing */
728 /* Mark the channel as not paused in any case */
729 chan->paused = FALSE;
731 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
733 if(gst_element_get_state(chan->pipeline, &state, NULL, GST_CLOCK_TIME_NONE) != GST_STATE_CHANGE_SUCCESS) {
734 WARNING(_("Could not get GstElement state"));
737 if(state != GST_STATE_PAUSED)
738 return; /* Silently do nothing */
740 if(!gst_element_set_state(chan->pipeline, GST_STATE_PLAYING)) {
741 WARNING_S(_("Could not set GstElement state to"), "PLAYING");
744 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
748 * glk_schannel_set_volume:
749 * @chan: Channel to set the volume of.
750 * @vol: Integer representing the volume; 0x10000 is 100%.
752 * Sets the volume in the channel, from 0 (silence) to 0x10000 (full volume).
753 * Again, you can overdrive the volume by setting a value greater than 0x10000,
754 * but this is not recommended.
756 * The glk_schannel_set_volume() function does not include duration and notify
757 * values. Both are assumed to be zero: immediate change, no notification.
759 * You can call this function between sounds, or while a sound is playing.
760 * However, a zero-duration change while a sound is playing may produce
763 * At most one volume change can be occurring on a sound channel at any time.
764 * If you call this function while a previous volume change is in progress, the
765 * previous change is interrupted.
767 * Not all libraries support this function. You should test the
768 * %gestalt_SoundVolume selector before you rely on it; see <link
769 * linkend="chimara-Testing-for-Sound-Capabilities">Testing for Sound
770 * Capabilities</link>.
772 * <note><title>Chimara</title>
773 * <para>Chimara supports volumes from 0 to 1000%, that is, values of
774 * @vol up to 0xA0000.</para>
778 glk_schannel_set_volume(schanid_t chan, glui32 vol)
780 glk_schannel_set_volume_ext(chan, vol, 0, 0);
784 volume_glk_to_gstreamer(glui32 volume_glk)
786 return CLAMP(((double)volume_glk / 0x10000), 0.0, 10.0);
789 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
791 volume_change_timeout(schanid_t chan)
794 g_get_current_time(&now);
796 if(now.tv_sec >= chan->target_time_sec && now.tv_usec >= chan->target_time_usec) {
797 /* We're done - make sure the volume is at the requested level */
798 g_object_set(chan->filter, "volume", chan->target_volume, NULL);
800 if(chan->volume_notify)
801 event_throw(chan->glk, evtype_VolumeNotify, NULL, 0, chan->volume_notify);
803 chan->volume_timer_id = 0;
807 /* Calculate the appropriate step every time - a busy system may delay or
808 * drop timer ticks */
809 double time_left_msec = (chan->target_time_sec - now.tv_sec) * 1000.0
810 + (chan->target_time_usec - now.tv_usec) / 1000.0;
811 double steps_left = time_left_msec / VOLUME_TIMER_RESOLUTION;
812 double current_volume;
813 g_object_get(chan->filter, "volume", ¤t_volume, NULL);
814 double volume_step = (chan->target_volume - current_volume) / steps_left;
816 g_object_set(chan->filter, "volume", current_volume + volume_step, NULL);
820 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
823 * glk_schannel_set_volume_ext:
824 * @chan: Channel to set the volume of.
825 * @vol: Integer representing the volume; 0x10000 is 100%.
826 * @duration: Length of volume change in milliseconds, or 0 for immediate.
827 * @notify: If nonzero, requests a notification when the volume change finishes.
829 * Sets the volume in the channel, from 0 (silence) to 0x10000 (full volume).
830 * Again, you can overdrive the volume by setting a value greater than 0x10000,
831 * but this is not recommended.
833 * If the @duration is zero, the change is immediate. Otherwise, the change
834 * begins immediately, and occurs smoothly over the next @duration milliseconds.
836 * The @notify value should be nonzero in order to request a volume notification
837 * event. If you do this, when the volume change is completed, you will get an
838 * event with type #evtype_VolumeNotify. The window will be %NULL, @val1 will be
839 * zero, and @val2 will be the nonzero value you passed as @notify.
841 * You can call this function between sounds, or while a sound is playing.
842 * However, a zero-duration change while a sound is playing may produce
845 * At most one volume change can be occurring on a sound channel at any time. If
846 * you call this function while a previous volume change is in progress, the
847 * previous change is interrupted. The beginning point of the new volume change
848 * should be wherever the previous volume change was interrupted (rather than
849 * the previous change's beginning or ending point).
851 * Not all libraries support these functions. You should test the appropriate
852 * gestalt selectors before you rely on them; see "Testing for Sound
856 glk_schannel_set_volume_ext(schanid_t chan, glui32 vol, glui32 duration, glui32 notify)
858 VALID_SCHANNEL(chan, return);
859 /* Silently ignore out-of-range volume values */
861 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
862 /* Interrupt a previous volume change */
863 if(chan->volume_timer_id > 0)
864 g_source_remove(chan->volume_timer_id);
866 double target_volume = volume_glk_to_gstreamer(vol);
869 g_object_set(chan->filter, "volume", target_volume, NULL);
872 event_throw(chan->glk, evtype_VolumeNotify, NULL, 0, notify);
877 GTimeVal target_time;
878 g_get_current_time(&target_time);
879 g_time_val_add(&target_time, (long)duration * 1000);
881 chan->target_volume = target_volume;
882 chan->target_time_sec = target_time.tv_sec;
883 chan->target_time_usec = target_time.tv_usec;
884 chan->volume_notify = notify;
886 /* Set up a timer for the volume */
887 chan->volume_timer_id = g_timeout_add(VOLUME_TIMER_RESOLUTION, (GSourceFunc)volume_change_timeout, chan);
888 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */
892 * glk_sound_load_hint:
893 * @snd: Resource number of a sound.
894 * @flag: Nonzero to tell the library to load the sound, zero to tell the
895 * library to unload it.
897 * This gives the library a hint about whether the given sound should be loaded
898 * or not. If the @flag is nonzero, the library may preload the sound or do
899 * other initialization, so that glk_schannel_play() will be faster. If the
900 * @flag is zero, the library may release memory or other resources associated
901 * with the sound. Calling this function is always optional, and it has no
902 * effect on what the library actually plays.
905 glk_sound_load_hint(glui32 snd, glui32 flag)
907 #if defined(GSTREAMER_0_10_SOUND) || defined(GSTREAMER_1_0_SOUND)
908 ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key);
909 giblorb_result_t resource;
910 giblorb_err_t result;
912 /* Sound load hints only work for Blorb resource maps */
913 if(!glk_data->resource_map)
917 /* The sound load hint simply loads the resource from the resource map;
918 loading a chunk more than once does nothing */
919 result = giblorb_load_resource(glk_data->resource_map, giblorb_method_Memory, &resource, giblorb_ID_Snd, snd);
920 if(result != giblorb_err_None) {
921 WARNING_S( _("Error loading resource"), giblorb_get_error_message(result) );
925 /* Get the Blorb chunk number by loading the resource with
926 method_DontLoad, then unload that chunk - has no effect if the chunk
928 result = giblorb_load_resource(glk_data->resource_map, giblorb_method_DontLoad, &resource, giblorb_ID_Snd, snd);
929 if(result != giblorb_err_None) {
930 WARNING_S( _("Error loading resource"), giblorb_get_error_message(result) );
933 result = giblorb_unload_chunk(glk_data->resource_map, resource.chunknum);
934 if(result != giblorb_err_None) {
935 WARNING_S( _("Error unloading chunk"), giblorb_get_error_message(result) );
939 #endif /* GSTREAMER_0_10_SOUND || GSTREAMER_1_0_SOUND */