Home | History | Annotate | Download | only in make 
      1 ##
      2 ##  Copyright (c) 2012 The WebM project authors. All Rights Reserved.
      3 ##
      4 ##  Use of this source code is governed by a BSD-style license
      5 ##  that can be found in the LICENSE file in the root of the source
      6 ##  tree. An additional intellectual property rights grant can be found
      7 ##  in the file PATENTS.  All contributing project authors may
      8 ##  be found in the AUTHORS file in the root of the source tree.
      9 ##
     10 
     11 #
     12 # This file is to be used for compiling libvpx for Android using the NDK.
     13 # In an Android project place a libvpx checkout in the jni directory.
     14 # Run the configure script from the jni directory.  Base libvpx
     15 # encoder/decoder configuration will look similar to:
     16 # ./libvpx/configure --target=armv7-android-gcc --disable-examples \
     17 #                    --sdk-path=/opt/android-ndk-r6b/
     18 #
     19 # When targeting Android, realtime-only is enabled by default.  This can
     20 # be overridden by adding the command line flag:
     21 #  --disable-realtime-only
     22 #
     23 # This will create .mk files that contain variables that contain the
     24 # source files to compile.
     25 #
     26 # Place an Android.mk file in the jni directory that references the
     27 # Android.mk file in the libvpx directory:
     28 # LOCAL_PATH := $(call my-dir)
     29 # include $(CLEAR_VARS)
     30 # include jni/libvpx/build/make/Android.mk
     31 #
     32 # There are currently two TARGET_ARCH_ABI targets for ARM.
     33 # armeabi and armeabi-v7a.  armeabi-v7a is selected by creating an
     34 # Application.mk in the jni directory that contains:
     35 # APP_ABI := armeabi-v7a
     36 #
     37 # By default libvpx will detect at runtime the existance of NEON extension.
     38 # For this we import the 'cpufeatures' module from the NDK sources.
     39 # libvpx can also be configured without this runtime detection method.
     40 # Configuring with --disable-runtime-cpu-detect will assume presence of NEON.
     41 # Configuring with --disable-runtime-cpu-detect --disable-neon \
     42 #     --disable-neon-asm
     43 # will remove any NEON dependency.
     44 
     45 # To change to building armeabi, run ./libvpx/configure again, but with
     46 # --target=arm5te-android-gcc and modify the Application.mk file to
     47 # set APP_ABI := armeabi
     48 #
     49 # Running ndk-build will build libvpx and include it in your project.
     50 #
     51 
     52 CONFIG_DIR := $(LOCAL_PATH)/
     53 LIBVPX_PATH := $(LOCAL_PATH)/libvpx
     54 ASM_CNV_PATH_LOCAL := $(TARGET_ARCH_ABI)/ads2gas
     55 ASM_CNV_PATH := $(LOCAL_PATH)/$(ASM_CNV_PATH_LOCAL)
     56 
     57 # Use the makefiles generated by upstream configure to determine which files to
     58 # build. Also set any architecture-specific flags.
     59 ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
     60   include $(CONFIG_DIR)libs-armv7-android-gcc.mk
     61   LOCAL_ARM_MODE := arm
     62 else ifeq  ($(TARGET_ARCH_ABI),armeabi)
     63   include $(CONFIG_DIR)libs-armv5te-android-gcc.mk
     64   LOCAL_ARM_MODE := arm
     65 else ifeq  ($(TARGET_ARCH_ABI),arm64-v8a)
     66   include $(CONFIG_DIR)libs-armv8-android-gcc.mk
     67   LOCAL_ARM_MODE := arm
     68 else ifeq ($(TARGET_ARCH_ABI),x86)
     69   include $(CONFIG_DIR)libs-x86-android-gcc.mk
     70 else ifeq ($(TARGET_ARCH_ABI),mips)
     71   include $(CONFIG_DIR)libs-mips-android-gcc.mk
     72 else
     73   $(error Not a supported TARGET_ARCH_ABI: $(TARGET_ARCH_ABI))
     74 endif
     75 
     76 # Rule that is normally in Makefile created by libvpx
     77 # configure.  Used to filter out source files based on configuration.
     78 enabled=$(filter-out $($(1)-no),$($(1)-yes))
     79 
     80 # Override the relative path that is defined by the libvpx
     81 # configure process
     82 SRC_PATH_BARE := $(LIBVPX_PATH)
     83 
     84 # Include the list of files to be built
     85 include $(LIBVPX_PATH)/libs.mk
     86 
     87 # Optimise the code. May want to revisit this setting in the future.
     88 LOCAL_CFLAGS := -O3
     89 
     90 # For x86, include the source code in the search path so it will find files
     91 # like x86inc.asm and x86_abi_support.asm
     92 LOCAL_ASMFLAGS := -I$(LIBVPX_PATH)
     93 
     94 # -----------------------------------------------------------------------------
     95 # Template  : asm_offsets_template
     96 # Arguments : 1: assembly offsets file to be created
     97 #             2: c file to base assembly offsets on
     98 # Returns   : None
     99 # Usage     : $(eval $(call asm_offsets_template,<asmfile>, <srcfile>
    100 # Rationale : Create offsets at compile time using for structures that are
    101 #             defined in c, but used in assembly functions.
    102 # -----------------------------------------------------------------------------
    103 define asm_offsets_template
    104 
    105 _SRC:=$(2)
    106 _OBJ:=$(ASM_CNV_PATH)/$$(notdir $(2)).S
    107 
    108 _FLAGS = $$($$(my)CFLAGS) \
    109           $$(call get-src-file-target-cflags,$(2)) \
    110           $$(call host-c-includes,$$(LOCAL_C_INCLUDES) $$(CONFIG_DIR)) \
    111           $$(LOCAL_CFLAGS) \
    112           $$(NDK_APP_CFLAGS) \
    113           $$(call host-c-includes,$$($(my)C_INCLUDES)) \
    114           -DINLINE_ASM \
    115           -S \
    116 
    117 _TEXT = "Compile $$(call get-src-file-text,$(2))"
    118 _CC   = $$(TARGET_CC)
    119 
    120 $$(eval $$(call ev-build-file))
    121 
    122 $(1) : $$(_OBJ) $(2)
    123 	@mkdir -p $$(dir $$@)
    124 	@grep $(OFFSET_PATTERN) $$< | tr -d '\#' | $(CONFIG_DIR)$(ASM_CONVERSION) > $$@
    125 endef
    126 
    127 # Use ads2gas script to convert from RVCT format to GAS format.  This
    128 #  puts the processed file under $(ASM_CNV_PATH).  Local clean rule
    129 #  to handle removing these
    130 ifeq ($(CONFIG_VP8_ENCODER), yes)
    131   ASM_CNV_OFFSETS_DEPEND += $(ASM_CNV_PATH)/vp8_asm_enc_offsets.asm
    132 endif
    133 ifeq ($(HAVE_NEON_ASM), yes)
    134   ASM_CNV_OFFSETS_DEPEND += $(ASM_CNV_PATH)/vpx_scale_asm_offsets.asm
    135 endif
    136 
    137 .PRECIOUS: %.asm.s
    138 $(ASM_CNV_PATH)/libvpx/%.asm.s: $(LIBVPX_PATH)/%.asm $(ASM_CNV_OFFSETS_DEPEND)
    139 	@mkdir -p $(dir $@)
    140 	@$(CONFIG_DIR)$(ASM_CONVERSION) <$< > $@
    141 
    142 # For building *_rtcd.h, which have rules in libs.mk
    143 TGT_ISA:=$(word 1, $(subst -, ,$(TOOLCHAIN)))
    144 target := libs
    145 
    146 LOCAL_SRC_FILES += vpx_config.c
    147 
    148 # Remove duplicate entries
    149 CODEC_SRCS_UNIQUE = $(sort $(CODEC_SRCS))
    150 
    151 # Pull out C files.  vpx_config.c is in the immediate directory and
    152 # so it does not need libvpx/ prefixed like the rest of the source files.
    153 # The neon files with intrinsics need to have .neon appended so the proper
    154 # flags are applied.
    155 CODEC_SRCS_C = $(filter %.c, $(CODEC_SRCS_UNIQUE))
    156 LOCAL_NEON_SRCS_C = $(filter %_neon.c, $(CODEC_SRCS_C))
    157 LOCAL_CODEC_SRCS_C = $(filter-out vpx_config.c %_neon.c, $(CODEC_SRCS_C))
    158 
    159 LOCAL_SRC_FILES += $(foreach file, $(LOCAL_CODEC_SRCS_C), libvpx/$(file))
    160 ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
    161   LOCAL_SRC_FILES += $(foreach file, $(LOCAL_NEON_SRCS_C), libvpx/$(file).neon)
    162 else # If there are neon sources then we are building for arm64 and do not need to specify .neon
    163   LOCAL_SRC_FILES += $(foreach file, $(LOCAL_NEON_SRCS_C), libvpx/$(file))
    164 endif
    165 
    166 # Pull out assembly files, splitting NEON from the rest.  This is
    167 # done to specify that the NEON assembly files use NEON assembler flags.
    168 # x86 assembly matches %.asm, arm matches %.asm.s
    169 
    170 # x86:
    171 
    172 CODEC_SRCS_ASM_X86 = $(filter %.asm, $(CODEC_SRCS_UNIQUE))
    173 LOCAL_SRC_FILES += $(foreach file, $(CODEC_SRCS_ASM_X86), libvpx/$(file))
    174 
    175 # arm:
    176 CODEC_SRCS_ASM_ARM_ALL = $(filter %.asm.s, $(CODEC_SRCS_UNIQUE))
    177 CODEC_SRCS_ASM_ARM = $(foreach v, \
    178                      $(CODEC_SRCS_ASM_ARM_ALL), \
    179                      $(if $(findstring neon,$(v)),,$(v)))
    180 CODEC_SRCS_ASM_ADS2GAS = $(patsubst %.s, \
    181                          $(ASM_CNV_PATH_LOCAL)/libvpx/%.s, \
    182                          $(CODEC_SRCS_ASM_ARM))
    183 LOCAL_SRC_FILES += $(CODEC_SRCS_ASM_ADS2GAS)
    184 
    185 ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
    186   CODEC_SRCS_ASM_NEON = $(foreach v, \
    187                         $(CODEC_SRCS_ASM_ARM_ALL),\
    188                         $(if $(findstring neon,$(v)),$(v),))
    189   CODEC_SRCS_ASM_NEON_ADS2GAS = $(patsubst %.s, \
    190                                 $(ASM_CNV_PATH_LOCAL)/libvpx/%.s, \
    191                                 $(CODEC_SRCS_ASM_NEON))
    192   LOCAL_SRC_FILES += $(patsubst %.s, \
    193                      %.s.neon, \
    194                      $(CODEC_SRCS_ASM_NEON_ADS2GAS))
    195 endif
    196 
    197 LOCAL_CFLAGS += \
    198     -DHAVE_CONFIG_H=vpx_config.h \
    199     -I$(LIBVPX_PATH) \
    200     -I$(ASM_CNV_PATH)
    201 
    202 LOCAL_MODULE := libvpx
    203 
    204 LOCAL_LDLIBS := -llog
    205 
    206 ifeq ($(CONFIG_RUNTIME_CPU_DETECT),yes)
    207   LOCAL_STATIC_LIBRARIES := cpufeatures
    208 endif
    209 
    210 # Add a dependency to force generation of the RTCD files.
    211 ifeq ($(CONFIG_VP8), yes)
    212 $(foreach file, $(LOCAL_SRC_FILES), $(LOCAL_PATH)/$(file)): vp8_rtcd.h
    213 endif
    214 ifeq ($(CONFIG_VP9), yes)
    215 $(foreach file, $(LOCAL_SRC_FILES), $(LOCAL_PATH)/$(file)): vp9_rtcd.h
    216 endif
    217 $(foreach file, $(LOCAL_SRC_FILES), $(LOCAL_PATH)/$(file)): vpx_scale_rtcd.h
    218 
    219 ifeq ($(TARGET_ARCH_ABI),x86)
    220 $(foreach file, $(LOCAL_SRC_FILES), $(LOCAL_PATH)/$(file)): vpx_config.asm
    221 endif
    222 
    223 .PHONY: clean
    224 clean:
    225 	@echo "Clean: ads2gas files [$(TARGET_ARCH_ABI)]"
    226 	@$(RM) $(CODEC_SRCS_ASM_ADS2GAS) $(CODEC_SRCS_ASM_NEON_ADS2GAS)
    227 	@$(RM) $(patsubst %.asm, %.*, $(ASM_CNV_OFFSETS_DEPEND))
    228 	@$(RM) -r $(ASM_CNV_PATH)
    229 	@$(RM) $(CLEAN-OBJS)
    230 
    231 include $(BUILD_SHARED_LIBRARY)
    232 
    233 ifeq ($(HAVE_NEON), yes)
    234   $(eval $(call asm_offsets_template,\
    235     $(ASM_CNV_PATH)/vpx_scale_asm_offsets.asm, \
    236     $(LIBVPX_PATH)/vpx_scale/vpx_scale_asm_offsets.c))
    237 endif
    238 
    239 ifeq ($(CONFIG_VP8_ENCODER), yes)
    240   $(eval $(call asm_offsets_template,\
    241     $(ASM_CNV_PATH)/vp8_asm_enc_offsets.asm, \
    242     $(LIBVPX_PATH)/vp8/encoder/vp8_asm_enc_offsets.c))
    243 endif
    244 
    245 ifeq ($(CONFIG_RUNTIME_CPU_DETECT),yes)
    246 $(call import-module,cpufeatures)
    247 endif
    248