How to build ffmpeg with hardware accelerated codecs for Android x86

Android 7.1

Android 6.0

Android 5.1

Android 4.4

Android 4.3

Android 4.0

Android 3.2

Android 2.3

Android 2.2

Android 2.1

Android 1.6

Android 1.5

Once the code base was checked out, use lunch command to build the system for once.

Enter the folder of checked out folder.

Source the build environement setup.

. build/envsetup.sh

Select the build target and type of build

lunch $TARGET_PRODUCT-$TARGET_BUILD_VARIANT

The $TARGET_PRODUCT could be one of android_x86 android_x86_64 .

The $TARGET_BUILD_VARIANT could be one of eng user userdebug .

So if we want to make a debug version of Android x86-64, we type

lunch android_x86_64-userdebug

Now type

m -jX iso_img

to make the system image.

When there is the error about org.android.analytics, open the file

./build/core/tasks/check_boot_jars/package_whitelist.txt

 and append a line

org\.android_x86\.analytics

to it.

If everything goes okay, the Android system image would be build.

 Now we start to build a better ffmpeg with hardware acceleration API, vaapi, cuvid etc. The system already offer the possibilty but didn't supply the correct configuration as the default.

Copy the file

external/ffmpeg/libavformat/Android.mk

to

external/ffmpeg/libavfilter

If you want to build the command line of ffmpeg, create a new Android.mk file under external/tools folder, fill it with content

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

LOCAL_CFLAGS += \
-DANDROID \
-DTARGET_CONFIG=\"config-x86_64-x86_64.h\" \

LOCAL_SRC_FILES := \
../ffmpeg.c \
../ffmpeg_filter.c \
../ffmpeg_opt.c \
../ffmpeg_cuvid.c \
../ffmpeg_vaapi.c \
../cmdutils.c \

LOCAL_C_INCLUDES += \
$(LOCAL_PATH)/android/include \
$(LOCAL_PATH)/.. \

LOCAL_SHARED_LIBRARIES := libavutil libavcodec libswscale libswresample libswscale libavformat libavfilter

LOCAL_MODULE_TAGS := optional
LOCAL_MODULE := ffmpeg

include $(BUILD_EXECUTABLE)

Then that's it, you would have the ffmpeg command line under /system/bin/ffmpeg !

Do not touch the script gen-android-configs and configure with ffmpeg.

Now let's add more dependency to the system, such as libva-utils for the Intel platform to detect the video codec capability of the system.

Under the folder external, clone the repository at branch 1.8.3

git clone -b 1.8.3 https://github.com/intel/libva-utils.git

Enter the libva-utils folder, change a bit the source code. The system's libva under driver is 1.1.0, it's not very compatible with the libva-utils, which is a new program.

diff --git a/vainfo/vainfo.c b/vainfo/vainfo.c
index 4405073..5d9f055 100644
--- a/vainfo/vainfo.c
+++ b/vainfo/vainfo.c
@@ -97,7 +97,8 @@ int main(int argc, const char* argv[])
const char *name = strrchr(argv[0], '/');
VAProfile profile, *profile_list = NULL;
int num_profiles, max_num_profiles, i;
-  VAEntrypoint entrypoint, entrypoints[10];
+  VAEntrypoint entrypoints[10];
+  int entrypoint_index;
int num_entrypoint;
int ret_val = 0;

@@ -118,8 +119,8 @@ int main(int argc, const char* argv[])
va_status = vaInitialize(va_dpy, &major_version, &minor_version);
CHECK_VASTATUS(va_status, "vaInitialize", 3);

-  printf("%s: VA-API version: %d.%d (libva %s)\n",
-         name, major_version, minor_version, LIBVA_VERSION_S);
+  printf("%s: VA-API version: %d.%d\n",
+         name, major_version, minor_version);

driver = vaQueryVendorString(va_dpy);
printf("%s: Driver version: %s\n", name, driver ? driver : "<unknown>");
@@ -149,8 +150,8 @@ int main(int argc, const char* argv[])
CHECK_VASTATUS(va_status, "vaQueryConfigEntrypoints", 4);

profile_str = profile_string(profile);
-      for (entrypoint = 0; entrypoint < num_entrypoint; entrypoint++)
-          printf("      %-32s: %s\n", profile_str, entrypoint_string(entrypoints[entrypoint]));
+      for (entrypoint_index = 0; entrypoint_index < num_entrypoint; entrypoint_index++)
+          printf("      %-32s: %s\n", profile_str, entrypoint_string(entrypoints[entrypoint_index]));

Just make the vainfo.c is able to be compiled with system libva.

Back to the folder android-x86, type

mmm external/libva-utils

to just build the specific module. That's it, now the /system/bin/vainfo would be there !

References

• http://www.android-x86.org/getsourcecode
• https://github.com/CyanogenMod/android_external_ffmpeg
• https://github.com/intel/libva
• https://github.com/intel/libva-utils

转载于:https://www.cnblogs.com/Jedimaster/p/10578983.html