Adding Gstreamer to AOSP

General Discussion
1

Hi, i am new to gstreamer and android but i am trying something similar to you and facing same issue like you.
I also tried gstreamer prebuilt binaries to AOSP under external/gstreamer* directory in the source tree, this is my Android.bp file under external/gstreamer directory:

cc_prebuilt_library_static {
    name: "libglib",
    strip: {
        none: true,
    },
    vendor: true,
    compile_multilib: "both",
    target: {
        android_x86_64: {
            srcs: ["x86_64/lib/libglib-2.0.a"],
            export_include_dirs: [
                "x86_64/include/glib-2.0",
                "x86_64/lib/glib-2.0/include",
            ],
        },
        android_x86: {
            srcs: ["x86/lib/libglib-2.0.a"],
            export_include_dirs: [
                "x86/include/glib-2.0",
                "x86/lib/glib-2.0/include",
            ],
        }
    },
}

cc_prebuilt_library_static {
    name: "libgstapp",
    strip: {
        none: true,
    },
    vendor: true,
    compile_multilib: "both",
    target: {
        android_x86_64: {
            srcs: ["x86_64/lib/libgstapp-1.0.a"],
            export_include_dirs: [
            	"x86_64/include",
                
            ],
        },
        android_x86: {
            srcs: ["x86/lib/libgstapp-1.0.a"],
            export_include_dirs: [
                "x86/include",
            ],
        }
    },
}

cc_prebuilt_library_static {
    name: "libgstbase",
    strip: {
        none: true,
    },
    vendor: true,
    compile_multilib: "both",
    target: {
        android_x86_64: {
            srcs: ["x86_64/lib/libgstbase-1.0.a"],
            export_include_dirs: [
                "x86_64/include",
                
            ],
        },
        android_x86: {
            srcs: ["x86/lib/libgstbase-1.0.a"],
            export_include_dirs: [
                "x86/include",
                
            ],
        }
    },
}

cc_prebuilt_library_static {
    name: "libgobject",
    strip: {
        none: true,
    },
    vendor: true,
    compile_multilib: "both",
    target: {
        android_x86_64: {
            srcs: ["x86_64/lib/libgobject-2.0.a"],
            export_include_dirs: [
            	
                "x86_64/include",
            ],
        },
        android_x86: {
            srcs: ["x86/lib/libgobject-2.0.a"],
            export_include_dirs: [
                "x86/include",
                
            ],
        }
    },
}

cc_prebuilt_library_static {
    name: "libffi",
    strip: {
        none: true,
    },
    vendor: true,
    compile_multilib: "both",
    target: {
        android_x86_64: {
            srcs: ["x86_64/lib/libffi.a"],
            export_include_dirs: [
            
                "x86_64/include",
            ],
        },
        android_x86: {
            srcs: ["x86/lib/libffi.a"],
            export_include_dirs: [
                "x86/include",
                
            ],
        }
    },
}

cc_prebuilt_library_static {
    name: "libintl",
    strip: {
        none: true,
    },
    vendor: true,
    compile_multilib: "both",
    target: {
        android_x86_64: {
            srcs: ["x86_64/lib/libintl.a"],
            export_include_dirs: [
                "x86_64/include",
            ],
        },
        android_x86: {
            srcs: ["x86/lib/libintl.a"],
            export_include_dirs: [
                "x86/include",
            ],
        }
    },
}

cc_prebuilt_library_static {
    name: "libgstreamer",
    strip: {
        none: true,
    },
    vendor: true,
    compile_multilib: "both",
    target: {
        android_x86_64: {
            srcs: ["x86_64/lib/libgstreamer-1.0.a"],
            export_include_dirs: [
            	"x86_64/include/glib-2.0",
                "x86_64/include/gstreamer-1.0",
            ],
        },
        android_x86: {
            srcs: ["x86/lib/libgstreamer-1.0.a"],
            export_include_dirs: [
                "x86/include/gstreamer-1.0",
                "x86/include/glib-2.0",
            ],
        }
    },
    static_libs: [
        "libglib",
        "libintl",
        "libgmodule",
        "libiconv",
        "libpcre2",
        "libgstapp",
        "libgobject",
        "libgstbase",
        "libgstplugin",
    ],
}


cc_prebuilt_library_static {
    name: "libgmodule",
    strip: {
        none: true,
    },
    vendor: true,
    compile_multilib: "both",
    target: {
        android_x86_64: {
            srcs: ["x86_64/lib/libgmodule-2.0.a"],
            export_include_dirs: [
                "x86_64/include/glib-2.0",
            
            ],
        },
        android_x86: {
            srcs: ["x86/lib/libgmodule-2.0.a"],
            export_include_dirs: [
                "x86/include/glib-2.0",
            
            ],
        }
    },
}

cc_prebuilt_library_static {
    name: "libgstplugin",
    strip: {
        none: true,
    },
    vendor: true,
    compile_multilib: "both",
    target: {
        android_x86_64: {
            srcs: ["x86_64/lib/gstreamer-1.0/libgstapp.a"],
            export_include_dirs: [
                "x86_64/include",
            
            ],
        },
        android_x86: {
            srcs: ["x86/lib/gstreamer-1.0/libgstapp.a"],
            export_include_dirs: [
                "x86/include",
            
            ],
        }
    },
    static_libs: [
        "libglib",
        "libintl",
        "libgmodule",
        "libiconv",
        "libpcre2",
        "libgstapp",
        "libgobject",
        "libgstbase",
    ],
}

cc_prebuilt_library_static {
    name: "libiconv",
    strip: {
        none: true,
    },
    vendor: true,
    compile_multilib: "both",
    target: {
        android_x86_64: {
            srcs: ["x86_64/lib/libiconv.a"],
            export_include_dirs: [
            	"x86_64/include",
                
            ],
        },
        android_x86: {
            srcs: ["x86/lib/libiconv.a"],
            export_include_dirs: [
                "x86/include/",
               
            ],
        }
    },
}

cc_prebuilt_library_static {
    name: "libpcre2",
    strip: {
        none: true,
    },
    vendor: true,
    compile_multilib: "both",
    target: {
        android_x86_64: {
            srcs: ["x86_64/lib/libpcre2-8.a"],
            export_include_dirs: [
          
                "x86_64/include",
            ],
        },
        android_x86: {
            srcs: ["x86/lib/libpcre2-8.a"],
            export_include_dirs: [
                "x86/include",
               
            ],
        }
    },
}

I am also not able to see plugin linked as this function always returns null in my case:
GstElement* source = gst_element_factory_make("autoaudiosrc", "source");

Please help, as i am new dont know what i am doing wrong here...

Thanks in advance!
2

And then under this directory device/generic/goldfish/audio i am linking those libraries in this Android.bp file:


//
// Copyright (C) 2011 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package {
    default_applicable_licenses: ["device_generic_goldfish_audio_license"],
}

// Added automatically by a large-scale-change
// See: http://go/android-license-faq
license {
    name: "device_generic_goldfish_audio_license",
    visibility: [":__subpackages__"],
    license_kinds: [
        "SPDX-license-identifier-Apache-2.0",
    ],
    license_text: [
        "NOTICE",
    ],
}

cc_library_shared {
    name: "android.hardware.audio.legacy@7.0-impl.ranchu",
    defaults: ["android.hardware.audio@7.0-impl_default"],
    relative_install_path: "hw",
    vendor: true,
}

cc_defaults {
    name: "android.hardware.audio@7.x-impl.ranchu_default",
    vendor: true,
    relative_install_path: "hw",
    defaults: ["hidl_defaults"],
    srcs: [
        "entry.cpp",
        "device_factory.cpp",
        "primary_device.cpp",
        "stream_common.cpp",
        "stream_in.cpp",
        "stream_out.cpp",
        "io_thread.cpp",
        "device_port_source.cpp",
        "device_port_sink.cpp",
        "talsa.cpp",
        "ring_buffer.cpp",
        "audio_ops.cpp",
        "util.cpp",
    ],
    shared_libs: [
        "android.hardware.audio@7.0",
        "android.hardware.audio@7.0-util",
        "android.hardware.audio.common@7.0",
        "android.hardware.audio.common@7.0-util",
        "libaudioutils",
        "libbase",
        "libcutils",
        "libhidlbase",
        "liblog",
        "libtinyalsav2",
        "libutils",
        "libfmq",
        "libprocessgroup",
       // "mygstreamer",
    ],
    static_libs: [
    	"libgstreamer",
   	    "libglib",
    	"libintl",
    	"libgobject",
    	"libgmodule",   // Added gmodule dependency
        "libiconv",    // Added libiconv dependency
        "libpcre2",    // Added pcre2 dependency
        "libffi",
        "libgstapp",
        "libgstbase",
        
    	],
    header_libs: [
        "android.hardware.audio.common.util@all-versions",
        "libaudio_system_headers",
    ],
    cflags: [
        "-include common/all-versions/VersionMacro.h",
    ],
}


cc_library_shared {
    name: "android.hardware.audio@7.0-impl.ranchu",
    defaults: ["android.hardware.audio@7.x-impl.ranchu_default"],
    vintf_fragments: ["android.hardware.audio@7.0-impl.ranchu.xml"],
    shared_libs: [
        "android.hardware.audio.common@7.0-enums",
    ],
    cflags: [
        "-DLOG_TAG=\"android.hardware.audio@7.0-impl.ranchu\"",
        "-DMAJOR_VERSION=7",
        "-DMINOR_VERSION=0",
        "-include common/all-versions/VersionMacro.h",
    ],
    // a.h.audio@X.0-impl.ranchu (see above) loads a.h.audio.legacy@X.0-impl
    // which loads:
    //  - audio.r_submix.default which provides the r_submix device (b/161485545)
    //  - audio.a2dp.default which provides the a2dp device (b/228804498)
    //  - audio.bluetooth.default which provides the bluetooth device (b/228804498)
    // This should be retired once we don't need to load the
    // deprecated libhardware modules listed above.
    //
    // audio.a2dp.default is not part of the required list as it's already in the
    // generic system image
    required: [
        "android.hardware.audio.legacy@7.0-impl.ranchu",
        "audio.r_submix.default",
        "audio.bluetooth.default",
    ],
}

cc_library_shared {
    name: "android.hardware.audio.legacy@7.1-impl.ranchu",
    defaults: ["android.hardware.audio@7.1-impl_default"],
    relative_install_path: "hw",
    vendor: true,
}

cc_library_shared {
    name: "android.hardware.audio@7.1-impl.ranchu",
    defaults: ["android.hardware.audio@7.x-impl.ranchu_default"],
    vintf_fragments: ["android.hardware.audio@7.1-impl.ranchu.xml"],
    shared_libs: [
        "android.hardware.audio@7.1",
        "android.hardware.audio.common@7.1-enums",
       // "mygstreamer",
    ],
    static_libs: [
    	"libgstreamer",
    	"libglib",
    	"libintl",
    	"libgobject",
    	"libgmodule",   // Added gmodule dependency
        "libiconv",    // Added libiconv dependency
        "libpcre2",    // Added pcre2 dependency
        "libffi",
        "libgstapp",
        "libgstbase",
        "libgstplugin"
    	],
    cflags: [
        "-DLOG_TAG=\"android.hardware.audio@7.1-impl.ranchu\"",
        "-DMAJOR_VERSION=7",
        "-DMINOR_VERSION=1",
        "-DCOMMON_TYPES_MINOR_VERSION=0",
        "-DCORE_TYPES_MINOR_VERSION=0",
    ],
    // a.h.audio@X.0-impl.ranchu (see above) loads a.h.audio.legacy@X.0-impl
    // which loads:
    //  - audio.r_submix.default which provides the r_submix device (b/161485545)
    //  - audio.a2dp.default which provides the a2dp device (b/228804498)
    //  - audio.bluetooth.default which provides the bluetooth device (b/228804498)
    // This should be retired once we don't need to load the
    // deprecated libhardware modules listed above.
    //
    // audio.a2dp.default is not part of the required list as it's already in the
    // generic system image
    required: [
        "android.hardware.audio.legacy@7.1-impl.ranchu",
        "audio.r_submix.default",
        "audio.bluetooth.default",
    ],
}