static void play_audio_file(AudioGraph *ag, GenesisAudioFile *audio_file, bool is_asset) {
// TODO atomically modify the pipeline instead of stopping and starting
stop_pipeline(ag);
if (ag->preview_audio_file && !ag->preview_audio_file_is_asset) {
genesis_audio_file_destroy(ag->preview_audio_file);
ag->preview_audio_file = nullptr;
} else if (ag->preview_audio_file && ag->preview_audio_file_is_asset) {
ag->preview_audio_file = nullptr;
}
assert(!ag->preview_audio_file);
ag->preview_audio_file = audio_file;
ag->preview_audio_file_is_asset = is_asset;
ag->audio_file_frame_count = 0;
ag->audio_file_frame_index = 0;
if (ag->preview_audio_file) {
ag->audio_file_frame_count = genesis_audio_file_frame_count(audio_file);
const struct SoundIoChannelLayout *channel_layout =
genesis_audio_file_channel_layout(ag->preview_audio_file);
for (int ch = 0; ch < channel_layout->channel_count; ch += 1) {
struct PlayChannelContext *channel_context = &ag->audio_file_channel_context[ch];
channel_context->offset = 0;
channel_context->iter = genesis_audio_file_iterator(ag->preview_audio_file, ch, 0);
}
}
audio_graph_start_pipeline(ag);
}
void audio_graph_stop_playback(AudioGraph *ag) {
stop_pipeline(ag);
ag->is_playing = false;
ag->play_head_pos = 0.0;
ag->start_play_head_pos = 0.0;
ag->events.trigger(EventAudioGraphPlayHeadChanged);
ag->events.trigger(EventAudioGraphPlayingChanged);
}
void audio_graph_change_sample_rate(AudioGraph *ag, int new_sample_rate) {
ag->play_head_pos = audio_graph_play_head_pos(ag);
stop_pipeline(ag);
GenesisNodeDescriptor *playback_node_descr = genesis_node_descriptor(ag->master_node);
genesis_node_destroy(ag->master_node);
ag->master_node = nullptr;
genesis_node_descriptor_destroy(playback_node_descr);
playback_node_descr = nullptr;
genesis_pipeline_set_sample_rate(ag->pipeline, new_sample_rate);
init_playback_node(ag);
audio_graph_start_pipeline(ag);
}
static void
test_pipeline (const char *pipeline)
{
GstElement *bin, *sink;
GstPad *pad, *sinkpad;
GstBus *bus;
GError *error = NULL;
GMainLoop *loop;
GstPadLinkReturn linkret;
bin = gst_parse_launch (pipeline, &error);
fail_unless (bin != NULL, "Error parsing pipeline: %s",
error ? error->message : "(invalid error)");
pad = gst_bin_find_unlinked_pad (GST_BIN (bin), GST_PAD_SRC);
fail_unless (pad != NULL, "Could not locate free src pad");
/* connect the fake sink */
sink = gst_element_factory_make ("fakesink", "fake_sink");
fail_unless (sink != NULL, "Could create fakesink");
fail_unless (gst_bin_add (GST_BIN (bin), sink), "Could not insert fakesink");
sinkpad = gst_element_get_static_pad (sink, "sink");
fail_unless (sinkpad != NULL, "Could not get fakesink src pad");
linkret = gst_pad_link (pad, sinkpad);
fail_unless (GST_PAD_LINK_SUCCESSFUL (linkret),
"Could not link to fake sink");
gst_object_unref (sinkpad);
/* run until we receive EOS */
loop = g_main_loop_new (NULL, FALSE);
bus = gst_element_get_bus (bin);
gst_bus_add_watch (bus, (GstBusFunc) eos_watch, loop);
gst_object_unref (bus);
start_pipeline (bin, pad);
g_main_loop_run (loop);
stop_pipeline (bin, pad);
/* clean up */
g_main_loop_unref (loop);
gst_object_unref (pad);
gst_object_unref (bin);
}
void audio_graph_recover_sound_backend_disconnect(AudioGraph *ag) {
if (!ag->master_node)
return;
ag->play_head_pos = audio_graph_play_head_pos(ag);
GenesisNodeDescriptor *playback_node_descr = genesis_node_descriptor(ag->master_node);
stop_pipeline(ag);
genesis_node_destroy(ag->master_node);
ag->master_node = nullptr;
genesis_node_descriptor_destroy(playback_node_descr);
playback_node_descr = nullptr;
init_playback_node(ag);
audio_graph_start_pipeline(ag);
}
static void
test_pipeline (const char *pipeline)
{
GstElement *bin, *sink;
GstPad *pad, *sinkpad;
GstBus *bus;
GError *error = NULL;
GMainLoop *loop;
GstPadLinkReturn linkret;
guint bus_watch = 0;
bin = gst_parse_launch (pipeline, &error);
fail_unless (bin != NULL, "Error parsing pipeline: %s",
error ? error->message : "(invalid error)");
pad = gst_bin_find_unlinked_pad (GST_BIN (bin), GST_PAD_SRC);
fail_unless (pad != NULL, "Could not locate free src pad");
/* connect the fake sink */
sink = gst_element_factory_make ("fakesink", "fake_sink");
fail_unless (sink != NULL, "Could create fakesink");
fail_unless (gst_bin_add (GST_BIN (bin), sink), "Could not insert fakesink");
sinkpad = gst_element_get_static_pad (sink, "sink");
fail_unless (sinkpad != NULL, "Could not get fakesink src pad");
linkret = gst_pad_link (pad, sinkpad);
fail_unless (GST_PAD_LINK_SUCCESSFUL (linkret),
"Could not link to fake sink");
gst_object_unref (sinkpad);
/* run until we receive EOS */
loop = g_main_loop_new (NULL, FALSE);
bus = gst_element_get_bus (bin);
bus_watch = gst_bus_add_watch (bus, (GstBusFunc) eos_watch, loop);
gst_object_unref (bus);
start_pipeline (bin, pad);
g_main_loop_run (loop);
/* we're EOS now; make sure oggmux out caps have stream headers on them */
{
GstStructure *s;
GstCaps *muxcaps;
muxcaps = gst_pad_get_negotiated_caps (sinkpad);
fail_unless (muxcaps != NULL);
s = gst_caps_get_structure (muxcaps, 0);
fail_unless (gst_structure_has_name (s, "application/ogg"));
fail_unless (gst_structure_has_field (s, "streamheader"));
fail_unless (gst_structure_has_field_typed (s, "streamheader",
GST_TYPE_ARRAY));
gst_caps_unref (muxcaps);
}
stop_pipeline (bin, pad);
/* clean up */
g_main_loop_unref (loop);
g_source_remove (bus_watch);
gst_object_unref (pad);
gst_object_unref (bin);
}
void audio_graph_recover_stream(AudioGraph *ag, double new_latency) {
ag->play_head_pos = audio_graph_play_head_pos(ag);
stop_pipeline(ag);
genesis_pipeline_set_latency(ag->pipeline, new_latency);
audio_graph_start_pipeline(ag);
}
void restart_pipeline(int effect_num){
stop_pipeline();
start_pipeline(effect_num);
}
