[开发工具]qtcreator调试gstreamer-meson编译

gstreamer目前有cerbora和meson两种编译方式，meson是gstreamer现在合并到一个git仓库后用的编译方式，编译参考另外一篇：使用meson编译gstreamer

step 1：进入gstreamer devenv

使用meson编译gstreamer后，gstreamer的库分布在不同的目录，如果要通过qtcreator调试，通过devenv进入dev环境：

$ ninja -C build/ devenv 
ninja: Entering directory `build/'
[0/1] Running external command devenv (wrapped by meson to set env)

这时候，环境变量都被设置好了，找到gstreamer运行需要的环境变量，在这里，配置了四个，包括GST_PLUGIN_PATH，LD_LIBRARY_PATH，GST_PLUGIN_SCANNER，GST_REGISTRY。

step 2：获取GST相关环境变量

$ env | grep GST

GST_PLUGIN_SYSTEM_PATH=

GST_PLUGIN_PATH=/home/hui/ # ... 这个很长很长，省略掉

GST_REGISTRY=/home/hui/disk4t/codes/gstreamer/gst-open-source/gstreamer-meson/build/registry.dat
GST_ENCODING_TARGET_PATH=/home/hui/disk4t/codes/gstreamer/gst-open-source/gstreamer-meson/subprojects/gst-plugins-bad/data/targets

GST_PLUGIN_SCANNER=/home/hui/disk4t/codes/gstreamer/gst-open-source/gstreamer-meson/build/subprojects/gstreamer/libs/gst/helpers/gst-plugin-scanner

GST_PRESET_PATH=/home/hui/disk4t/codes/gstreamer/gst-open-source/gstreamer-meson/subprojects/gst-plugins-ugly/ext/x264:/home/hui/disk4t/codes/gstreamer/gst-open-source/gstreamer-meson/subprojects/gst-plugins-good/gst/isomp4:/home/hui/disk4t/codes/gstreamer/gst-open-source/gstreamer-meson/subprojects/gst-plugins-good/gst/equalizer:/home/hui/disk4t/codes/gstreamer/gst-open-source/gstreamer-meson/subprojects/gst-plugins-bad/gst/freeverb

step 3：获取LD_LIBRARY_PATH环境变量

$ env | grep LD_

LD_LIBRARY_PATH=/home/hui/ # ... 这个很长很长

step 4：导入代码到qtcreator

project name自己写一个就行，Location选择代码路径然后open，选择next->finish就可以了

/home/hui/disk4t/codes/gstreamer/gst-open-source/gstreamer-meson/subprojects

进入qtcreator主界面，删掉Build directory，build相关的都不需要，直接用gstreamer原始的meson build就可以

进入Run标签页

step 5：配置Run三项

Executable:

/home/hui/disk4t/codes/gstreamer/gst-open-source/gstreamer-meson/build/subprojects/gstreamer/tools/gst-launch-1.0

Command line arguments:

playbin uri=file:///home/hui/hbc9_h264.avi

Working directory:

/home/hui/disk4t/codes/gstreamer/gst-open-source/gstreamer-meson/

环境变量配置为前面找到的环境变量值

GST_PLUGIN_PATH
GST_PLUGIN_SCANNER
GST_REGISTRY
LD_LIBRARY_PATH

配置好后如下

然后在需要的地方设置断点，F5就可以进入debug模式了。

step 6：进入debug模式

上个效果图