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 will remove any
42# NEON dependency.
43
44# To change to building armeabi, run ./libvpx/configure again, but with
45# --target=arm5te-android-gcc and modify the Application.mk file to
46# set APP_ABI := armeabi
47#
48# Running ndk-build will build libvpx and include it in your project.
49#
50
51CONFIG_DIR := $(LOCAL_PATH)/
52LIBVPX_PATH := $(LOCAL_PATH)/libvpx
53ASM_CNV_PATH_LOCAL := $(TARGET_ARCH_ABI)/ads2gas
54ASM_CNV_PATH := $(LOCAL_PATH)/$(ASM_CNV_PATH_LOCAL)
55
56# Makefiles created by the libvpx configure process
57# This will need to be fixed to handle x86.
58ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
59  include $(CONFIG_DIR)libs-armv7-android-gcc.mk
60else
61  include $(CONFIG_DIR)libs-armv5te-android-gcc.mk
62endif
63
64# Rule that is normally in Makefile created by libvpx
65# configure.  Used to filter out source files based on configuration.
66enabled=$(filter-out $($(1)-no),$($(1)-yes))
67
68# Override the relative path that is defined by the libvpx
69# configure process
70SRC_PATH_BARE := $(LIBVPX_PATH)
71
72# Include the list of files to be built
73include $(LIBVPX_PATH)/libs.mk
74
75# Want arm, not thumb, optimized
76LOCAL_ARM_MODE := arm
77LOCAL_CFLAGS := -O3
78
79# -----------------------------------------------------------------------------
80# Template  : asm_offsets_template
81# Arguments : 1: assembly offsets file to be created
82#             2: c file to base assembly offsets on
83# Returns   : None
84# Usage     : $(eval $(call asm_offsets_template,<asmfile>, <srcfile>
85# Rationale : Create offsets at compile time using for structures that are
86#             defined in c, but used in assembly functions.
87# -----------------------------------------------------------------------------
88define asm_offsets_template
89
90_SRC:=$(2)
91_OBJ:=$(ASM_CNV_PATH)/$$(notdir $(2)).S
92
93_FLAGS = $$($$(my)CFLAGS) \
94          $$(call get-src-file-target-cflags,$(2)) \
95          $$(call host-c-includes,$$(LOCAL_C_INCLUDES) $$(CONFIG_DIR)) \
96          $$(LOCAL_CFLAGS) \
97          $$(NDK_APP_CFLAGS) \
98          $$(call host-c-includes,$$($(my)C_INCLUDES)) \
99          -DINLINE_ASM \
100          -S \
101
102_TEXT = "Compile $$(call get-src-file-text,$(2))"
103_CC   = $$(TARGET_CC)
104
105$$(eval $$(call ev-build-file))
106
107$(1) : $$(_OBJ) $(2)
108	@mkdir -p $$(dir $$@)
109	@grep $(OFFSET_PATTERN) $$< | tr -d '\#' | $(CONFIG_DIR)$(ASM_CONVERSION) > $$@
110endef
111
112# Use ads2gas script to convert from RVCT format to GAS format.  This passes
113#  puts the processed file under $(ASM_CNV_PATH).  Local clean rule
114#  to handle removing these
115ifeq ($(CONFIG_VP8_ENCODER), yes)
116  ASM_CNV_OFFSETS_DEPEND += $(ASM_CNV_PATH)/vp8_asm_enc_offsets.asm
117endif
118ifeq ($(HAVE_NEON), yes)
119  ASM_CNV_OFFSETS_DEPEND += $(ASM_CNV_PATH)/vpx_scale_asm_offsets.asm
120endif
121
122.PRECIOUS: %.asm.s
123$(ASM_CNV_PATH)/libvpx/%.asm.s: $(LIBVPX_PATH)/%.asm $(ASM_CNV_OFFSETS_DEPEND)
124	@mkdir -p $(dir $@)
125	@$(CONFIG_DIR)$(ASM_CONVERSION) <$< > $@
126
127# For building *_rtcd.h, which have rules in libs.mk
128TGT_ISA:=$(word 1, $(subst -, ,$(TOOLCHAIN)))
129target := libs
130
131LOCAL_SRC_FILES += vpx_config.c
132
133# Remove duplicate entries
134CODEC_SRCS_UNIQUE = $(sort $(CODEC_SRCS))
135
136# Pull out C files.  vpx_config.c is in the immediate directory and
137# so it does not need libvpx/ prefixed like the rest of the source files.
138# The neon files with intrinsics need to have .neon appended so the proper
139# flags are applied.
140CODEC_SRCS_C = $(filter %.c, $(CODEC_SRCS_UNIQUE))
141LOCAL_NEON_SRCS_C = $(filter %_neon.c, $(CODEC_SRCS_C))
142LOCAL_CODEC_SRCS_C = $(filter-out vpx_config.c %_neon.c, $(CODEC_SRCS_C))
143
144LOCAL_SRC_FILES += $(foreach file, $(LOCAL_CODEC_SRCS_C), libvpx/$(file))
145LOCAL_SRC_FILES += $(foreach file, $(LOCAL_NEON_SRCS_C), libvpx/$(file).neon)
146
147# Pull out assembly files, splitting NEON from the rest.  This is
148# done to specify that the NEON assembly files use NEON assembler flags.
149CODEC_SRCS_ASM_ALL = $(filter %.asm.s, $(CODEC_SRCS_UNIQUE))
150CODEC_SRCS_ASM = $(foreach v, \
151                 $(CODEC_SRCS_ASM_ALL), \
152                 $(if $(findstring neon,$(v)),,$(v)))
153CODEC_SRCS_ASM_ADS2GAS = $(patsubst %.s, \
154                         $(ASM_CNV_PATH_LOCAL)/libvpx/%.s, \
155                         $(CODEC_SRCS_ASM))
156LOCAL_SRC_FILES += $(CODEC_SRCS_ASM_ADS2GAS)
157
158ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
159  CODEC_SRCS_ASM_NEON = $(foreach v, \
160                        $(CODEC_SRCS_ASM_ALL),\
161                        $(if $(findstring neon,$(v)),$(v),))
162  CODEC_SRCS_ASM_NEON_ADS2GAS = $(patsubst %.s, \
163                                $(ASM_CNV_PATH_LOCAL)/libvpx/%.s, \
164                                $(CODEC_SRCS_ASM_NEON))
165  LOCAL_SRC_FILES += $(patsubst %.s, \
166                     %.s.neon, \
167                     $(CODEC_SRCS_ASM_NEON_ADS2GAS))
168endif
169
170LOCAL_CFLAGS += \
171    -DHAVE_CONFIG_H=vpx_config.h \
172    -I$(LIBVPX_PATH) \
173    -I$(ASM_CNV_PATH)
174
175LOCAL_MODULE := libvpx
176
177LOCAL_LDLIBS := -llog
178
179ifeq ($(CONFIG_RUNTIME_CPU_DETECT),yes)
180  LOCAL_STATIC_LIBRARIES := cpufeatures
181endif
182
183# Add a dependency to force generation of the RTCD files.
184ifeq ($(CONFIG_VP8), yes)
185$(foreach file, $(LOCAL_SRC_FILES), $(LOCAL_PATH)/$(file)): vp8_rtcd.h
186endif
187ifeq ($(CONFIG_VP9), yes)
188$(foreach file, $(LOCAL_SRC_FILES), $(LOCAL_PATH)/$(file)): vp9_rtcd.h
189endif
190$(foreach file, $(LOCAL_SRC_FILES), $(LOCAL_PATH)/$(file)): vpx_scale_rtcd.h
191
192.PHONY: clean
193clean:
194	@echo "Clean: ads2gas files [$(TARGET_ARCH_ABI)]"
195	@$(RM) $(CODEC_SRCS_ASM_ADS2GAS) $(CODEC_SRCS_ASM_NEON_ADS2GAS)
196	@$(RM) $(patsubst %.asm, %.*, $(ASM_CNV_OFFSETS_DEPEND))
197	@$(RM) -r $(ASM_CNV_PATH)
198	@$(RM) $(CLEAN-OBJS)
199
200include $(BUILD_SHARED_LIBRARY)
201
202ifeq ($(HAVE_NEON), yes)
203  $(eval $(call asm_offsets_template,\
204    $(ASM_CNV_PATH)/vpx_scale_asm_offsets.asm, \
205    $(LIBVPX_PATH)/vpx_scale/vpx_scale_asm_offsets.c))
206endif
207
208ifeq ($(CONFIG_VP8_ENCODER), yes)
209  $(eval $(call asm_offsets_template,\
210    $(ASM_CNV_PATH)/vp8_asm_enc_offsets.asm, \
211    $(LIBVPX_PATH)/vp8/encoder/vp8_asm_enc_offsets.c))
212endif
213
214ifeq ($(CONFIG_RUNTIME_CPU_DETECT),yes)
215$(call import-module,cpufeatures)
216endif
217