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
52CONFIG_DIR := $(LOCAL_PATH)/
53LIBVPX_PATH := $(LOCAL_PATH)/libvpx
54ASM_CNV_PATH_LOCAL := $(TARGET_ARCH_ABI)/ads2gas
55ASM_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.
59ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
60  include $(CONFIG_DIR)libs-armv7-android-gcc.mk
61  LOCAL_ARM_MODE := arm
62else ifeq  ($(TARGET_ARCH_ABI),armeabi)
63  include $(CONFIG_DIR)libs-armv5te-android-gcc.mk
64  LOCAL_ARM_MODE := arm
65else ifeq  ($(TARGET_ARCH_ABI),arm64-v8a)
66  include $(CONFIG_DIR)libs-armv8-android-gcc.mk
67  LOCAL_ARM_MODE := arm
68else ifeq ($(TARGET_ARCH_ABI),x86)
69  include $(CONFIG_DIR)libs-x86-android-gcc.mk
70else ifeq ($(TARGET_ARCH_ABI),mips)
71  include $(CONFIG_DIR)libs-mips-android-gcc.mk
72else
73  $(error Not a supported TARGET_ARCH_ABI: $(TARGET_ARCH_ABI))
74endif
75
76# Rule that is normally in Makefile created by libvpx
77# configure.  Used to filter out source files based on configuration.
78enabled=$(filter-out $($(1)-no),$($(1)-yes))
79
80# Override the relative path that is defined by the libvpx
81# configure process
82SRC_PATH_BARE := $(LIBVPX_PATH)
83
84# Include the list of files to be built
85include $(LIBVPX_PATH)/libs.mk
86
87# Optimise the code. May want to revisit this setting in the future.
88LOCAL_CFLAGS := -O3
89
90# For x86, include the source code in the search path so it will find files
91# like x86inc.asm and x86_abi_support.asm
92LOCAL_ASMFLAGS := -I$(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 $(call asm_offsets_template,<asmfile>, <srcfile>
100# Rationale : Create offsets at compile time using for structures that are
101#             defined in c, but used in assembly functions.
102# -----------------------------------------------------------------------------
103define asm_offsets_template
104
105_SRC:=$(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) $$< | tr -d '\#' | $(CONFIG_DIR)$(ASM_CONVERSION) > $$@
125endef
126
127# Use ads2gas script to convert from RVCT format to GAS format.  This
128#  puts the processed file under $(ASM_CNV_PATH).  Local clean rule
129#  to handle removing these
130ifeq ($(CONFIG_VP8_ENCODER), yes)
131  ASM_CNV_OFFSETS_DEPEND += $(ASM_CNV_PATH)/vp8_asm_enc_offsets.asm
132endif
133ifeq ($(HAVE_NEON_ASM), yes)
134  ASM_CNV_OFFSETS_DEPEND += $(ASM_CNV_PATH)/vpx_scale_asm_offsets.asm
135endif
136
137.PRECIOUS: %.asm.s
138$(ASM_CNV_PATH)/libvpx/%.asm.s: $(LIBVPX_PATH)/%.asm $(ASM_CNV_OFFSETS_DEPEND)
139	@mkdir -p $(dir $@)
140	@$(CONFIG_DIR)$(ASM_CONVERSION) <$< > $@
141
142# For building *_rtcd.h, which have rules in libs.mk
143TGT_ISA:=$(word 1, $(subst -, ,$(TOOLCHAIN)))
144target := libs
145
146LOCAL_SRC_FILES += vpx_config.c
147
148# Remove duplicate entries
149CODEC_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.
155CODEC_SRCS_C = $(filter %.c, $(CODEC_SRCS_UNIQUE))
156LOCAL_NEON_SRCS_C = $(filter %_neon.c, $(CODEC_SRCS_C))
157LOCAL_CODEC_SRCS_C = $(filter-out vpx_config.c %_neon.c, $(CODEC_SRCS_C))
158
159LOCAL_SRC_FILES += $(foreach file, $(LOCAL_CODEC_SRCS_C), libvpx/$(file))
160ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
161  LOCAL_SRC_FILES += $(foreach file, $(LOCAL_NEON_SRCS_C), libvpx/$(file).neon)
162else # 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))
164endif
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
172CODEC_SRCS_ASM_X86 = $(filter %.asm, $(CODEC_SRCS_UNIQUE))
173LOCAL_SRC_FILES += $(foreach file, $(CODEC_SRCS_ASM_X86), libvpx/$(file))
174
175# arm:
176CODEC_SRCS_ASM_ARM_ALL = $(filter %.asm.s, $(CODEC_SRCS_UNIQUE))
177CODEC_SRCS_ASM_ARM = $(foreach v, \
178                     $(CODEC_SRCS_ASM_ARM_ALL), \
179                     $(if $(findstring neon,$(v)),,$(v)))
180CODEC_SRCS_ASM_ADS2GAS = $(patsubst %.s, \
181                         $(ASM_CNV_PATH_LOCAL)/libvpx/%.s, \
182                         $(CODEC_SRCS_ASM_ARM))
183LOCAL_SRC_FILES += $(CODEC_SRCS_ASM_ADS2GAS)
184
185ifeq ($(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                     $(CODEC_SRCS_ASM_NEON_ADS2GAS))
195endif
196
197LOCAL_CFLAGS += \
198    -DHAVE_CONFIG_H=vpx_config.h \
199    -I$(LIBVPX_PATH) \
200    -I$(ASM_CNV_PATH)
201
202LOCAL_MODULE := libvpx
203
204LOCAL_LDLIBS := -llog
205
206ifeq ($(CONFIG_RUNTIME_CPU_DETECT),yes)
207  LOCAL_STATIC_LIBRARIES := cpufeatures
208endif
209
210# Add a dependency to force generation of the RTCD files.
211ifeq ($(CONFIG_VP8), yes)
212$(foreach file, $(LOCAL_SRC_FILES), $(LOCAL_PATH)/$(file)): vp8_rtcd.h
213endif
214ifeq ($(CONFIG_VP9), yes)
215$(foreach file, $(LOCAL_SRC_FILES), $(LOCAL_PATH)/$(file)): vp9_rtcd.h
216endif
217$(foreach file, $(LOCAL_SRC_FILES), $(LOCAL_PATH)/$(file)): vpx_scale_rtcd.h
218
219ifeq ($(TARGET_ARCH_ABI),x86)
220$(foreach file, $(LOCAL_SRC_FILES), $(LOCAL_PATH)/$(file)): vpx_config.asm
221endif
222
223.PHONY: clean
224clean:
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
231include $(BUILD_SHARED_LIBRARY)
232
233ifeq ($(HAVE_NEON), yes)
234  $(eval $(call asm_offsets_template,\
235    $(ASM_CNV_PATH)/vpx_scale_asm_offsets.asm, \
236    $(LIBVPX_PATH)/vpx_scale/vpx_scale_asm_offsets.c))
237endif
238
239ifeq ($(CONFIG_VP8_ENCODER), yes)
240  $(eval $(call asm_offsets_template,\
241    $(ASM_CNV_PATH)/vp8_asm_enc_offsets.asm, \
242    $(LIBVPX_PATH)/vp8/encoder/vp8_asm_enc_offsets.c))
243endif
244
245ifeq ($(CONFIG_RUNTIME_CPU_DETECT),yes)
246$(call import-module,cpufeatures)
247endif
248