feat: basic-tutorial-6 finish
parent
905ac7fb1e
commit
9768fa1cb4
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@ -8,7 +8,8 @@ include_directories(/usr/lib/aarch64-linux-gnu/glib-2.0/include)
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# add_executable(${PROJECT_NAME} basic-tutorial-1.c)
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# add_executable(${PROJECT_NAME} basic-tutorial-2.c)
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add_executable(${PROJECT_NAME} basic-tutorial-3.c)
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# add_executable(${PROJECT_NAME} basic-tutorial-3.c)
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add_executable(${PROJECT_NAME} basic-tutorial-6.c)
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target_link_libraries(${PROJECT_NAME}
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gstreamer-1.0
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@ -0,0 +1,217 @@
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#include <gst/gst.h>
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static gboolean print_field (GQuark field,const GValue *value, gpointer pfx)
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{
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gchar *str = gst_value_serialize (value);
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g_print("%s %15s: %s\n",(gchar *)pfx, g_quark_to_string(field),str);
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g_free(str);
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return TRUE;
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}
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static void print_caps (const GstCaps *caps, const gchar *pfx)
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{
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guint i;
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g_return_if_fail (caps != NULL);
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if(gst_caps_is_any(caps))
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{
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g_print("%sANY\n",pfx);
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return;
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}
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if(gst_caps_is_empty(caps))
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{
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g_print("%sEMPTY\n",pfx);
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return;
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}
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for( i = 0; i < gst_caps_get_size(caps);i++)
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{
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GstStructure *structure = gst_caps_get_structure(caps,i);
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g_print("%s%s\n",pfx,gst_structure_get_name(structure));
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gst_structure_foreach(structure,print_field,(gpointer)pfx);
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}
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}
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static void print_pad_templates_information (GstElementFactory *factory)
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{
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const GList *pads;
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GstStaticPadTemplate *padtemplate;
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g_print("Pad Templates for %s:\n",gst_element_factory_get_longname(factory));
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if(!gst_element_factory_get_num_pad_templates(factory))
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{
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g_print(" none\n");
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return;
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}
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pads = gst_element_factory_get_static_pad_templates(factory);
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while(pads)
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{
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padtemplate = pads->data;
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pads = g_list_next(pads);
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if(padtemplate->direction == GST_PAD_SRC)
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{
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g_print("SRC template: '%s'\n",padtemplate->name_template);
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}
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else if(padtemplate->direction == GST_PAD_SINK)
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{
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g_print("SINK template: '%s'\n",padtemplate->name_template);
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}
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else
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{
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g_print("UNKNOWN!! template: '%s'\n",padtemplate->name_template);
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}
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if(padtemplate->presence == GST_PAD_ALWAYS)
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{
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g_print(" Availability: Always\n");
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}
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else if(padtemplate->presence == GST_PAD_SOMETIMES)
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{
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g_print(" Availability: Sometimes\n");
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}
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else if(padtemplate->presence == GST_PAD_REQUEST)
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{
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g_print(" Availability: On request\n");
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}
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else
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{
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g_print(" Availability: UNKNOWN!!!\n");
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}
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if(padtemplate->static_caps.string)
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{
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GstCaps *caps;
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g_print(" Capabilities: \n");
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caps = gst_static_caps_get(&padtemplate->static_caps);
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print_caps(caps, " ");
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gst_caps_unref(caps);
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}
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g_print("\n");
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}
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}
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static void print_pad_capabilities(GstElement *element, gchar *pad_name)
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{
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GstPad *pad = NULL;
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GstCaps *caps = NULL;
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pad = gst_element_get_static_pad(element, pad_name);
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if(!pad)
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{
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g_printerr("Could not retrieve pad '%s'\n",pad_name);
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return;
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}
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caps = gst_pad_get_current_caps(pad);
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if(!caps)
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{
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caps = gst_pad_query_caps(pad,NULL);
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g_print("Caps for the %s pad:\n",pad_name);
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print_caps(caps," ");
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gst_caps_unref(caps);
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gst_object_unref(pad);
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}
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}
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int main(int argc, char *argv[])
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{
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GstElement *pipeline, *source, *sink;
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GstElementFactory *source_factory,*sink_factory;
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GstBus *bus;
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GstMessage *msg;
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GstStateChangeReturn ret;
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gboolean terminate = FALSE;
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gst_init(&argc,&argv);
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source_factory = gst_element_factory_find("audiotestsrc");
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sink_factory = gst_element_factory_find("autoaudiosink");
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if(!source_factory || !sink_factory)
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{
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g_printerr("Not all element fatories could be created.\n");
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return -1;
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}
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print_pad_templates_information(source_factory);
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print_pad_templates_information(sink_factory);
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source = gst_element_factory_create(source_factory,"source");
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sink = gst_element_factory_create(sink_factory,"sink");
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pipeline = gst_pipeline_new("test-pipeline");
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if(!pipeline || !source || !sink)
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{
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g_printerr("Not all element could be created!\n");
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return -1;
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}
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gst_bin_add_many(GST_BIN(pipeline),source,sink,NULL);
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if(gst_element_link(source,sink)!=TRUE)
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{
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g_printerr("Elements could not be linked!\n");
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g_object_unref(pipeline);
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return -1;
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}
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g_print("In NULL state:\n");
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print_pad_capabilities(sink,"sink");
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ret = gst_element_set_state(pipeline,GST_STATE_PLAYING);
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if(ret == GST_STATE_CHANGE_FAILURE)
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{
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g_printerr("Unable to set the pipeline to the playing state (check the bus for error message).\n");
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}
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bus = gst_element_get_bus(pipeline);
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do
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{
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msg = gst_bus_timed_pop_filtered(bus, GST_CLOCK_TIME_NONE, GST_MESSAGE_ERROR | GST_MESSAGE_EOS |GST_MESSAGE_STATE_CHANGED);
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if(msg != NULL)
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{
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GError *err;
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gchar *debug_info;
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switch (GST_MESSAGE_TYPE (msg))
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{
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case GST_MESSAGE_ERROR:
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gst_message_parse_error(msg, &err, &debug_info);
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g_printerr("Error received from element %s: %s\n",GST_OBJECT_NAME(msg->src),err->message);
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g_printerr("Debugging information: %s\n",debug_info ? debug_info : "none");
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g_clear_error(&err);
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g_free(debug_info);
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terminate = TRUE;
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break;
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case GST_MESSAGE_EOS:
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g_print("End-Of-Stream reached.\n");
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terminate = TRUE;
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break;
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case GST_MESSAGE_STATE_CHANGED:
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if(GST_MESSAGE_SRC(msg) == GST_OBJECT(pipeline))
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{
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GstState old_state,new_state,pending_state;
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gst_message_parse_state_changed(msg,&old_state,&new_state,&pending_state);
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g_print("\nPipeline state changed from %s to %s:\n",
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gst_element_state_get_name(old_state),gst_element_state_get_name(new_state));
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print_pad_capabilities(sink,"sink");
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}
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break;
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default:
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g_printerr("Unexpected message received.\n");
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break;
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}
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gst_message_unref(msg);
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}
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}while(!terminate);
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gst_object_unref(bus);
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gst_element_set_state(pipeline,GST_STATE_NULL);
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gst_object_unref(pipeline);
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gst_object_unref(source_factory);
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gst_object_unref(sink_factory);
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return;
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}
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@ -123,32 +123,32 @@ BasicTutorial/fast:
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$(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/build
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.PHONY : BasicTutorial/fast
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basic-tutorial-3.o: basic-tutorial-3.c.o
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basic-tutorial-6.o: basic-tutorial-6.c.o
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.PHONY : basic-tutorial-3.o
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.PHONY : basic-tutorial-6.o
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# target to build an object file
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basic-tutorial-3.c.o:
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$(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-3.c.o
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.PHONY : basic-tutorial-3.c.o
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basic-tutorial-6.c.o:
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$(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-6.c.o
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.PHONY : basic-tutorial-6.c.o
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basic-tutorial-3.i: basic-tutorial-3.c.i
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basic-tutorial-6.i: basic-tutorial-6.c.i
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.PHONY : basic-tutorial-3.i
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.PHONY : basic-tutorial-6.i
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# target to preprocess a source file
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basic-tutorial-3.c.i:
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$(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-3.c.i
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.PHONY : basic-tutorial-3.c.i
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basic-tutorial-6.c.i:
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$(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-6.c.i
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.PHONY : basic-tutorial-6.c.i
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basic-tutorial-3.s: basic-tutorial-3.c.s
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basic-tutorial-6.s: basic-tutorial-6.c.s
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.PHONY : basic-tutorial-3.s
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.PHONY : basic-tutorial-6.s
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# target to generate assembly for a file
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basic-tutorial-3.c.s:
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$(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-3.c.s
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.PHONY : basic-tutorial-3.c.s
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basic-tutorial-6.c.s:
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$(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-6.c.s
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.PHONY : basic-tutorial-6.c.s
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# Help Target
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help:
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@ -159,9 +159,9 @@ help:
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@echo "... rebuild_cache"
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@echo "... edit_cache"
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@echo "... BasicTutorial"
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@echo "... basic-tutorial-3.o"
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@echo "... basic-tutorial-3.i"
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@echo "... basic-tutorial-3.s"
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@echo "... basic-tutorial-6.o"
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@echo "... basic-tutorial-6.i"
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@echo "... basic-tutorial-6.s"
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.PHONY : help
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