feat: basic-torial-8 finish
parent
8c0acdf21a
commit
c1a4909fd9
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@ -1,5 +1,6 @@
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{
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"files.associations": {
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"gst.h": "c"
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"gst.h": "c",
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"audio.h": "c"
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}
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}
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@ -10,10 +10,12 @@ include_directories(/usr/lib/aarch64-linux-gnu/glib-2.0/include)
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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(${PROJECT_NAME} basic-tutorial-6.c)
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add_executable(${PROJECT_NAME} basic-tutorial-7.c)
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# add_executable(${PROJECT_NAME} basic-tutorial-7.c)
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add_executable(${PROJECT_NAME} basic-tutorial-8.c)
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target_link_libraries(${PROJECT_NAME}
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gstreamer-1.0
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gobject-2.0
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glib-2.0
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gstaudio-1.0
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)
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@ -0,0 +1,215 @@
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#include <gst/gst.h>
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#include <gst/audio/audio.h>
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#include <string.h>
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#define CHUNK_SIZE 1024
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#define SAMPLE_RATE 44100
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typedef struct _CustomData
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{
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GstElement *pipeline,*app_source,*tee,*audio_queue,*audio_convert1,*audio_resample,*audio_sink;
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GstElement *video_queue,*audio_convert2,*visual,*video_convert,*video_sink;
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GstElement *app_queue,*app_sink;
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guint64 num_samples;
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gfloat a,b,c,d;
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guint sourceid;
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GMainLoop *main_loop;
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}CustomData;
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static gboolean push_data(CustomData *data)
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{
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GstBuffer *buffer;
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GstFlowReturn ret;
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int i;
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GstMapInfo map;
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gint16 *raw;
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gint num_samples = CHUNK_SIZE / 2;
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gfloat freq;
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buffer = gst_buffer_new_and_alloc (CHUNK_SIZE);
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GST_BUFFER_TIMESTAMP(buffer) = gst_util_uint64_scale(data->num_samples,GST_SECOND,SAMPLE_RATE);
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GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale(num_samples,GST_SECOND,SAMPLE_RATE);
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gst_buffer_map(buffer, &map,GST_MAP_WRITE);
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raw = (gint16 *)map.data;
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data->c +=data->d;
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data->d -=data->c /1000;
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freq = 1100 + 1000 * data->d;
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for(i = 0;i<num_samples;i++)
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{
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data->a +=data->b;
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data->b -=data->a / freq;
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raw[i] = (gint16)(500 * data->a );
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}
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gst_buffer_unmap(buffer, &map);
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data->num_samples += num_samples;
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g_signal_emit_by_name(data->app_source,"push-buffer",buffer,&ret);
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gst_buffer_unref(buffer);
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if(ret != GST_FLOW_OK)
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{
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return FALSE;
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}
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return TRUE;
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}
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static void start_feed(GstElement *source, guint size, CustomData *data)
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{
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if(data->sourceid == 0)
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{
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g_print("Start feeding\n");
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data->sourceid = g_idle_add((GSourceFunc) push_data,data);
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}
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}
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static void stop_feed(GstElement *source,CustomData *data)
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{
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if(data->sourceid != 0)
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{
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g_print("Stop feeding\n");
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g_source_remove(data->sourceid);
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data->sourceid = 0;
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}
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}
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static GstFlowReturn new_sample(GstElement *sink,CustomData *data)
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{
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GstSample *sample;
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g_signal_emit_by_name(sink,"pull-sample",&sample);
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if(sample)
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{
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g_print("*");
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gst_sample_unref(sample);
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return GST_FLOW_OK;
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}
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return GST_FLOW_ERROR;
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}
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static void error_cb(GstBus *bus,GstMessage *msg,CustomData *data)
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{
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GError *err;
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gchar *debug_info;
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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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g_main_loop_quit(data->main_loop);
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}
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int main(int argc, char *argv[])
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{
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CustomData data;
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GstPad *tee_audio_pad,*tee_video_pad,*tee_app_pad;
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GstPad *queue_audio_pad,*queue_video_pad,*queue_app_pad;
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GstAudioInfo info;
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GstCaps *audio_caps;
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GstBus *bus;
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memset(&data,0,sizeof(data));
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data.b = 1;
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data.d = 1;
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gst_init(&argc,&argv);
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data.app_source = gst_element_factory_make("appsrc","audio_source");
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data.tee = gst_element_factory_make("tee","tee");
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data.audio_queue = gst_element_factory_make("queue","audio_queue");
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data.audio_convert1 = gst_element_factory_make("audioconvert","audio_convert1");
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data.audio_resample = gst_element_factory_make("audioresample","audio_resample");
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data.audio_sink = gst_element_factory_make("autoaudiosink","audio_sink");
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data.video_queue = gst_element_factory_make("queue","video_queue");
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data.audio_convert2 = gst_element_factory_make("audioconvert","audio_convert2");
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data.visual = gst_element_factory_make("wavescope","visual");
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data.video_convert = gst_element_factory_make("videoconvert","video_convert");
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data.video_sink = gst_element_factory_make("autovideosink","video_sink");
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data.app_queue = gst_element_factory_make("queue","app_queue");
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data.app_sink = gst_element_factory_make("appsink","app_sink");
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data.pipeline = gst_pipeline_new("test-pipeline");
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if( !data.pipeline || !data.app_source || !data.tee || !data.audio_queue || !data.audio_convert1 || !data.audio_resample
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|| !data.audio_resample || !data.audio_sink || !data.video_queue || !data.audio_convert2 || !data.visual
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|| !data.video_convert || !data.video_sink || !data.app_queue || !data.app_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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g_object_set (data.visual,"shader",0,"style",0,NULL);
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gst_audio_info_set_format(&info,GST_AUDIO_FORMAT_S16, SAMPLE_RATE,1,NULL);
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audio_caps = gst_audio_info_to_caps(&info);
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g_object_set(data.app_source,"caps",audio_caps,"format",GST_FORMAT_TIME,NULL);
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g_signal_connect(data.app_source,"need-data",G_CALLBACK(start_feed),&data);
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g_signal_connect(data.app_source,"enough-data",G_CALLBACK(stop_feed),&data);
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g_object_set(data.app_sink,"emit-signals",TRUE,"caps",audio_caps,NULL);
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g_signal_connect(data.app_sink,"new-sample",G_CALLBACK(new_sample),&data);
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gst_caps_unref(audio_caps);
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gst_bin_add_many(GST_BIN(data.pipeline),data.app_source,data.tee,data.audio_queue,
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data.audio_convert1,data.audio_resample,data.audio_sink,data.video_queue,
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data.audio_convert2,data.visual,data.video_convert,data.video_sink,
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data.app_queue,data.app_sink,NULL);
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if(gst_element_link_many (data.app_source,data.tee,NULL) != TRUE ||
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gst_element_link_many (data.audio_queue,data.audio_convert1,data.audio_resample,data.audio_sink,NULL) != TRUE ||
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gst_element_link_many (data.video_queue,data.audio_convert2,data.visual,data.video_convert,data.video_sink,NULL) != TRUE ||
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gst_element_link_many (data.app_queue,data.app_sink,NULL) != TRUE)
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{
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g_printerr("ELements could not be linked.\n");
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gst_object_unref(data.pipeline);
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return -1;
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}
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tee_audio_pad = gst_element_get_request_pad(data.tee,"src_%u");
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g_print("Obtained request pad %s for audio branch.\n",gst_pad_get_name(tee_audio_pad));
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queue_audio_pad = gst_element_get_static_pad(data.audio_queue,"sink");
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tee_video_pad = gst_element_get_request_pad(data.tee,"src_%u");
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g_print("Obtained request pad %s for video branch.\n",gst_pad_get_name(tee_video_pad));
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queue_video_pad = gst_element_get_static_pad(data.video_queue,"sink");
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tee_app_pad = gst_element_get_request_pad(data.tee,"src_%u");
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g_print("Obtained request pad %s for app branch.\n",gst_pad_get_name(tee_app_pad));
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queue_app_pad = gst_element_get_static_pad(data.app_queue,"sink");
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if(gst_pad_link(tee_audio_pad,queue_audio_pad) != GST_PAD_LINK_OK ||
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gst_pad_link(tee_video_pad,queue_video_pad) != GST_PAD_LINK_OK ||
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gst_pad_link(tee_app_pad,queue_app_pad) != GST_PAD_LINK_OK)
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{
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g_printerr("Tee could not be linked\n");
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return -1;
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}
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gst_object_unref(queue_audio_pad);
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gst_object_unref(queue_video_pad);
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gst_object_unref(queue_app_pad);
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bus = gst_element_get_bus(data.pipeline);
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gst_bus_add_signal_watch(bus);
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g_signal_connect(G_OBJECT(bus),"message::error",(GCallback)error_cb,&data);
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gst_object_unref(bus);
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gst_element_set_state(data.pipeline,GST_STATE_PLAYING);
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data.main_loop = g_main_loop_new(NULL,FALSE);
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g_main_loop_run(data.main_loop);
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gst_element_release_request_pad(data.tee,tee_audio_pad);
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gst_element_release_request_pad(data.tee,tee_video_pad);
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gst_element_release_request_pad(data.tee,tee_app_pad);
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gst_object_unref(tee_audio_pad);
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gst_object_unref(tee_video_pad);
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gst_object_unref(tee_app_pad);
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gst_element_set_state(data.pipeline,GST_STATE_NULL);
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gst_object_unref(data.pipeline);
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return 0;
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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-7.o: basic-tutorial-7.c.o
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basic-tutorial-8.o: basic-tutorial-8.c.o
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.PHONY : basic-tutorial-7.o
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.PHONY : basic-tutorial-8.o
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# target to build an object file
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basic-tutorial-7.c.o:
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$(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-7.c.o
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.PHONY : basic-tutorial-7.c.o
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basic-tutorial-8.c.o:
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$(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-8.c.o
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.PHONY : basic-tutorial-8.c.o
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basic-tutorial-7.i: basic-tutorial-7.c.i
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basic-tutorial-8.i: basic-tutorial-8.c.i
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.PHONY : basic-tutorial-7.i
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.PHONY : basic-tutorial-8.i
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# target to preprocess a source file
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basic-tutorial-7.c.i:
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$(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-7.c.i
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.PHONY : basic-tutorial-7.c.i
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basic-tutorial-8.c.i:
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$(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-8.c.i
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.PHONY : basic-tutorial-8.c.i
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basic-tutorial-7.s: basic-tutorial-7.c.s
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basic-tutorial-8.s: basic-tutorial-8.c.s
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.PHONY : basic-tutorial-7.s
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.PHONY : basic-tutorial-8.s
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# target to generate assembly for a file
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basic-tutorial-7.c.s:
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$(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-7.c.s
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.PHONY : basic-tutorial-7.c.s
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basic-tutorial-8.c.s:
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$(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-8.c.s
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.PHONY : basic-tutorial-8.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-7.o"
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@echo "... basic-tutorial-7.i"
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@echo "... basic-tutorial-7.s"
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@echo "... basic-tutorial-8.o"
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@echo "... basic-tutorial-8.i"
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@echo "... basic-tutorial-8.s"
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.PHONY : help
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