From 8c0acdf21a6dc43dfb8e78e5e8996df1d354efd8 Mon Sep 17 00:00:00 2001 From: 12345qiupeng Date: Mon, 13 Feb 2023 15:37:13 +0000 Subject: [PATCH] fix: basic-tutorial-7.c works! --- .vscode/launch.json | 7 ++++ CMakeLists.txt | 3 +- basic-tutorial-7.c | 85 +++++++++++++++++++++++++++++++++++++++++++++ build/Makefile | 36 +++++++++---------- 4 files changed, 112 insertions(+), 19 deletions(-) create mode 100644 .vscode/launch.json create mode 100644 basic-tutorial-7.c diff --git a/.vscode/launch.json b/.vscode/launch.json new file mode 100644 index 0000000..f980ab9 --- /dev/null +++ b/.vscode/launch.json @@ -0,0 +1,7 @@ +{ + // 使用 IntelliSense 了解相关属性。 + // 悬停以查看现有属性的描述。 + // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387 + "version": "0.2.0", + "configurations": [] +} \ No newline at end of file diff --git a/CMakeLists.txt b/CMakeLists.txt index f867afb..aea9ad7 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -9,7 +9,8 @@ include_directories(/usr/lib/aarch64-linux-gnu/glib-2.0/include) # add_executable(${PROJECT_NAME} basic-tutorial-1.c) # add_executable(${PROJECT_NAME} basic-tutorial-2.c) # add_executable(${PROJECT_NAME} basic-tutorial-3.c) -add_executable(${PROJECT_NAME} basic-tutorial-6.c) +# add_executable(${PROJECT_NAME} basic-tutorial-6.c) +add_executable(${PROJECT_NAME} basic-tutorial-7.c) target_link_libraries(${PROJECT_NAME} gstreamer-1.0 diff --git a/basic-tutorial-7.c b/basic-tutorial-7.c new file mode 100644 index 0000000..2c9d3d2 --- /dev/null +++ b/basic-tutorial-7.c @@ -0,0 +1,85 @@ +#include + +int main(int argc,char *argv[]) +{ + GstElement *pipeline,*audio_source,*tee,*audio_queue,*audio_convert,*audio_resample,*audio_sink; + GstElement *video_queue,*visual,*video_convert,*video_sink; + GstBus *bus; + GstMessage *msg; + GstPad *tee_audio_pad, *tee_video_pad; + GstPad *queue_audio_pad,*queue_video_pad; + + GstPadTemplate *tee_audio_pad_template,*tee_video_pad_template; + + gst_init(&argc,&argv); + + audio_source = gst_element_factory_make("audiotestsrc","audio_source"); + tee = gst_element_factory_make("tee","tee"); + audio_queue = gst_element_factory_make("queue","audio_queue"); + audio_convert = gst_element_factory_make("audioconvert","audio_convert"); + audio_resample = gst_element_factory_make("audioresample","Audio_resample"); + audio_sink = gst_element_factory_make("autoaudiosink","audio_sink"); + video_queue = gst_element_factory_make("queue","vide_queue"); + visual = gst_element_factory_make("wavescope","visual"); + video_convert = gst_element_factory_make("videoconvert","csp"); + video_sink = gst_element_factory_make("autovideosink","video_sink"); + + pipeline = gst_pipeline_new("test-pipeline"); + + if( !pipeline ||!audio_source || !tee|| !audio_queue || !audio_convert || !audio_resample || !audio_sink || + !video_queue || !visual || !video_convert || !video_sink) + { + g_printerr("Not all elements could be created.\n"); + return -1; + } + + g_object_set(audio_source,"freq",215.0f,NULL); + g_object_set(visual,"shader",0,"style",1,NULL); + + gst_bin_add_many(GST_BIN(pipeline),audio_source,tee,audio_queue,audio_convert,audio_resample, + audio_sink,video_queue,visual,video_convert,video_sink,NULL); + if(gst_element_link_many(audio_source,tee,NULL)!= TRUE || + gst_element_link_many(audio_queue,audio_convert,audio_resample,audio_sink,NULL) != TRUE || + gst_element_link_many(video_queue,visual,video_convert,video_sink,NULL) != TRUE ) + { + g_printerr("Elements could not be linked.\n"); + g_object_unref(pipeline); + return -1; + } + + // tee_audio_pad_template = gst_element_class_get_pad_template(GST_ELEMENT_GET_CLASS(tee),"src%d"); + tee_audio_pad = gst_element_get_request_pad(tee,"src_%u"); + g_print("Obtained request pad %s for audio branch.\n",gst_pad_get_name(tee_audio_pad)); + // tee_video_pad_template = gst_element_class_get_pad_template(GST_ELEMENT_CLASS(tee),"src%d"); + queue_audio_pad = gst_element_get_static_pad(audio_queue,"sink"); + tee_video_pad = gst_element_get_request_pad(tee,"src_%u"); + g_print("Obtained request pad %s for video branch",gst_pad_get_name(tee_video_pad)); + queue_video_pad = gst_element_get_static_pad(video_queue,"sink"); + if(gst_pad_link(tee_audio_pad,queue_audio_pad) != GST_PAD_LINK_OK || + gst_pad_link(tee_video_pad,queue_video_pad) != GST_PAD_LINK_OK) + { + g_printerr("Tee could not be linked!\n"); + return -1; + } + + gst_object_unref(queue_audio_pad); + gst_object_unref(queue_video_pad); + + gst_element_set_state(pipeline,GST_STATE_PLAYING); + + bus = gst_element_get_bus(pipeline); + msg = gst_bus_timed_pop_filtered(bus, GST_CLOCK_TIME_NONE,GST_MESSAGE_ERROR | GST_MESSAGE_EOS); + + gst_element_release_request_pad(tee,tee_audio_pad); + gst_element_release_request_pad(tee,tee_video_pad); + gst_object_unref(tee_audio_pad); + gst_object_unref(tee_video_pad); + + if(msg != NULL) + gst_message_unref(msg); + gst_object_unref(bus); + gst_element_set_state(pipeline,GST_STATE_NULL); + + gst_object_unref(pipeline); + return 0; +} \ No newline at end of file diff --git a/build/Makefile b/build/Makefile index c15d8ba..58a4311 100644 --- a/build/Makefile +++ b/build/Makefile @@ -123,32 +123,32 @@ BasicTutorial/fast: $(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/build .PHONY : BasicTutorial/fast -basic-tutorial-6.o: basic-tutorial-6.c.o +basic-tutorial-7.o: basic-tutorial-7.c.o -.PHONY : basic-tutorial-6.o +.PHONY : basic-tutorial-7.o # target to build an object file -basic-tutorial-6.c.o: - $(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-6.c.o -.PHONY : basic-tutorial-6.c.o +basic-tutorial-7.c.o: + $(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-7.c.o +.PHONY : basic-tutorial-7.c.o -basic-tutorial-6.i: basic-tutorial-6.c.i +basic-tutorial-7.i: basic-tutorial-7.c.i -.PHONY : basic-tutorial-6.i +.PHONY : basic-tutorial-7.i # target to preprocess a source file -basic-tutorial-6.c.i: - $(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-6.c.i -.PHONY : basic-tutorial-6.c.i +basic-tutorial-7.c.i: + $(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-7.c.i +.PHONY : basic-tutorial-7.c.i -basic-tutorial-6.s: basic-tutorial-6.c.s +basic-tutorial-7.s: basic-tutorial-7.c.s -.PHONY : basic-tutorial-6.s +.PHONY : basic-tutorial-7.s # target to generate assembly for a file -basic-tutorial-6.c.s: - $(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-6.c.s -.PHONY : basic-tutorial-6.c.s +basic-tutorial-7.c.s: + $(MAKE) -f CMakeFiles/BasicTutorial.dir/build.make CMakeFiles/BasicTutorial.dir/basic-tutorial-7.c.s +.PHONY : basic-tutorial-7.c.s # Help Target help: @@ -159,9 +159,9 @@ help: @echo "... rebuild_cache" @echo "... edit_cache" @echo "... BasicTutorial" - @echo "... basic-tutorial-6.o" - @echo "... basic-tutorial-6.i" - @echo "... basic-tutorial-6.s" + @echo "... basic-tutorial-7.o" + @echo "... basic-tutorial-7.i" + @echo "... basic-tutorial-7.s" .PHONY : help