1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
|
##
## Copyright (c) 2016, Alliance for Open Media. All rights reserved
##
## This source code is subject to the terms of the BSD 2 Clause License and
## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
## was not distributed with this source code in the LICENSE file, you can
## obtain it at www.aomedia.org/license/software. If the Alliance for Open
## Media Patent License 1.0 was not distributed with this source code in the
## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
##
LIBYUV_SRCS += third_party/libyuv/include/libyuv/basic_types.h \
third_party/libyuv/include/libyuv/convert.h \
third_party/libyuv/include/libyuv/convert_argb.h \
third_party/libyuv/include/libyuv/convert_from.h \
third_party/libyuv/include/libyuv/cpu_id.h \
third_party/libyuv/include/libyuv/planar_functions.h \
third_party/libyuv/include/libyuv/rotate.h \
third_party/libyuv/include/libyuv/row.h \
third_party/libyuv/include/libyuv/scale.h \
third_party/libyuv/include/libyuv/scale_row.h \
third_party/libyuv/source/cpu_id.cc \
third_party/libyuv/source/planar_functions.cc \
third_party/libyuv/source/row_any.cc \
third_party/libyuv/source/row_common.cc \
third_party/libyuv/source/row_gcc.cc \
third_party/libyuv/source/row_mips.cc \
third_party/libyuv/source/row_neon.cc \
third_party/libyuv/source/row_neon64.cc \
third_party/libyuv/source/row_win.cc \
third_party/libyuv/source/scale.cc \
third_party/libyuv/source/scale_any.cc \
third_party/libyuv/source/scale_common.cc \
third_party/libyuv/source/scale_gcc.cc \
third_party/libyuv/source/scale_mips.cc \
third_party/libyuv/source/scale_neon.cc \
third_party/libyuv/source/scale_neon64.cc \
third_party/libyuv/source/scale_win.cc \
LIBWEBM_COMMON_SRCS += third_party/libwebm/common/hdr_util.cc \
third_party/libwebm/common/hdr_util.h \
third_party/libwebm/common/webmids.h
LIBWEBM_MUXER_SRCS += third_party/libwebm/mkvmuxer/mkvmuxer.cc \
third_party/libwebm/mkvmuxer/mkvmuxerutil.cc \
third_party/libwebm/mkvmuxer/mkvwriter.cc \
third_party/libwebm/mkvmuxer/mkvmuxer.h \
third_party/libwebm/mkvmuxer/mkvmuxertypes.h \
third_party/libwebm/mkvmuxer/mkvmuxerutil.h \
third_party/libwebm/mkvparser/mkvparser.h \
third_party/libwebm/mkvmuxer/mkvwriter.h
LIBWEBM_PARSER_SRCS = third_party/libwebm/mkvparser/mkvparser.cc \
third_party/libwebm/mkvparser/mkvreader.cc \
third_party/libwebm/mkvparser/mkvparser.h \
third_party/libwebm/mkvparser/mkvreader.h
# Add compile flags and include path for libwebm sources.
ifeq ($(CONFIG_WEBM_IO),yes)
CXXFLAGS += -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS
INC_PATH-yes += $(SRC_PATH_BARE)/third_party/libwebm
endif
# List of examples to build. UTILS are tools meant for distribution
# while EXAMPLES demonstrate specific portions of the API.
UTILS-$(CONFIG_AV1_DECODER) += aomdec.c
aomdec.SRCS += md5_utils.c md5_utils.h
aomdec.SRCS += aom_ports/mem_ops.h
aomdec.SRCS += aom_ports/mem_ops_aligned.h
aomdec.SRCS += aom_ports/msvc.h
aomdec.SRCS += aom_ports/aom_timer.h
aomdec.SRCS += aom/aom_integer.h
aomdec.SRCS += args.c args.h
aomdec.SRCS += ivfdec.c ivfdec.h
aomdec.SRCS += tools_common.c tools_common.h
aomdec.SRCS += y4menc.c y4menc.h
ifeq ($(CONFIG_LIBYUV),yes)
aomdec.SRCS += $(LIBYUV_SRCS)
endif
ifeq ($(CONFIG_WEBM_IO),yes)
aomdec.SRCS += $(LIBWEBM_COMMON_SRCS)
aomdec.SRCS += $(LIBWEBM_MUXER_SRCS)
aomdec.SRCS += $(LIBWEBM_PARSER_SRCS)
aomdec.SRCS += webmdec.cc webmdec.h
endif
aomdec.GUID = BA5FE66F-38DD-E034-F542-B1578C5FB950
aomdec.DESCRIPTION = Full featured decoder
UTILS-$(CONFIG_AV1_ENCODER) += aomenc.c
aomenc.SRCS += args.c args.h y4minput.c y4minput.h aomenc.h
aomenc.SRCS += ivfdec.c ivfdec.h
aomenc.SRCS += ivfenc.c ivfenc.h
aomenc.SRCS += rate_hist.c rate_hist.h
aomenc.SRCS += tools_common.c tools_common.h
aomenc.SRCS += examples/encoder_util.h examples/encoder_util.c
aomenc.SRCS += warnings.c warnings.h
aomenc.SRCS += aom_ports/mem_ops.h
aomenc.SRCS += aom_ports/mem_ops_aligned.h
aomenc.SRCS += aom_ports/msvc.h
aomenc.SRCS += aom_ports/aom_timer.h
aomenc.SRCS += aomstats.c aomstats.h
ifeq ($(CONFIG_LIBYUV),yes)
aomenc.SRCS += $(LIBYUV_SRCS)
endif
ifeq ($(CONFIG_WEBM_IO),yes)
aomenc.SRCS += $(LIBWEBM_COMMON_SRCS)
aomenc.SRCS += $(LIBWEBM_MUXER_SRCS)
aomenc.SRCS += $(LIBWEBM_PARSER_SRCS)
aomenc.SRCS += webmenc.cc webmenc.h
endif
aomenc.GUID = 548DEC74-7A15-4B2B-AFC3-AA102E7C25C1
aomenc.DESCRIPTION = Full featured encoder
ifeq ($(CONFIG_ANALYZER),yes)
EXAMPLES-$(CONFIG_AV1_DECODER) += analyzer.cc
analyzer.GUID = 83827a8c-e3c3-4b19-8832-0cfc206c4496
analyzer.SRCS += ivfdec.h ivfdec.c
analyzer.SRCS += av1/decoder/inspection.h
analyzer.SRCS += av1/decoder/inspection.c
analyzer.SRCS += video_reader.h video_reader.c
analyzer.SRCS += tools_common.h tools_common.c
analyzer.DESCRIPTION = Bitstream analyzer
endif
ifeq ($(CONFIG_INSPECTION),yes)
EXAMPLES-$(CONFIG_AV1_DECODER) += inspect.c
inspect.GUID = FA46A420-3356-441F-B0FD-60AA1345C181
inspect.SRCS += ivfdec.h ivfdec.c
inspect.SRCS += args.c args.h
inspect.SRCS += tools_common.h tools_common.c
inspect.SRCS += video_common.h
inspect.SRCS += video_reader.h video_reader.c
inspect.SRCS += aom_ports/mem_ops.h
inspect.SRCS += aom_ports/mem_ops_aligned.h
inspect.SRCS += aom_ports/msvc.h
inspect.DESCRIPTION = Dump inspection data
endif
EXAMPLES-$(CONFIG_AV1_DECODER) += simple_decoder.c
simple_decoder.GUID = D3BBF1E9-2427-450D-BBFF-B2843C1D44CC
simple_decoder.SRCS += ivfdec.h ivfdec.c
simple_decoder.SRCS += tools_common.h tools_common.c
simple_decoder.SRCS += video_common.h
simple_decoder.SRCS += video_reader.h video_reader.c
simple_decoder.SRCS += aom_ports/mem_ops.h
simple_decoder.SRCS += aom_ports/mem_ops_aligned.h
simple_decoder.SRCS += aom_ports/msvc.h
simple_decoder.DESCRIPTION = Simplified decoder loop
EXAMPLES-$(CONFIG_AV1_DECODER) += decode_to_md5.c
decode_to_md5.SRCS += md5_utils.h md5_utils.c
decode_to_md5.SRCS += ivfdec.h ivfdec.c
decode_to_md5.SRCS += tools_common.h tools_common.c
decode_to_md5.SRCS += video_common.h
decode_to_md5.SRCS += video_reader.h video_reader.c
decode_to_md5.SRCS += aom_ports/mem_ops.h
decode_to_md5.SRCS += aom_ports/mem_ops_aligned.h
decode_to_md5.SRCS += aom_ports/msvc.h
decode_to_md5.GUID = 59120B9B-2735-4BFE-B022-146CA340FE42
decode_to_md5.DESCRIPTION = Frame by frame MD5 checksum
EXAMPLES-$(CONFIG_AV1_ENCODER) += simple_encoder.c
simple_encoder.SRCS += ivfenc.h ivfenc.c
simple_encoder.SRCS += tools_common.h tools_common.c
simple_encoder.SRCS += video_common.h
simple_encoder.SRCS += video_writer.h video_writer.c
simple_encoder.SRCS += aom_ports/msvc.h
simple_encoder.GUID = 4607D299-8A71-4D2C-9B1D-071899B6FBFD
simple_encoder.DESCRIPTION = Simplified encoder loop
EXAMPLES-$(CONFIG_AV1_ENCODER) += lossless_encoder.c
lossless_encoder.SRCS += ivfenc.h ivfenc.c
lossless_encoder.SRCS += tools_common.h tools_common.c
lossless_encoder.SRCS += video_common.h
lossless_encoder.SRCS += video_writer.h video_writer.c
lossless_encoder.SRCS += aom_ports/msvc.h
lossless_encoder.GUID = B63C7C88-5348-46DC-A5A6-CC151EF93366
lossless_encoder.DESCRIPTION = Simplified lossless encoder
EXAMPLES-$(CONFIG_AV1_ENCODER) += twopass_encoder.c
twopass_encoder.SRCS += ivfenc.h ivfenc.c
twopass_encoder.SRCS += tools_common.h tools_common.c
twopass_encoder.SRCS += video_common.h
twopass_encoder.SRCS += video_writer.h video_writer.c
twopass_encoder.SRCS += aom_ports/msvc.h
twopass_encoder.GUID = 73494FA6-4AF9-4763-8FBB-265C92402FD8
twopass_encoder.DESCRIPTION = Two-pass encoder loop
EXAMPLES-$(CONFIG_AV1_DECODER) += decode_with_drops.c
decode_with_drops.SRCS += ivfdec.h ivfdec.c
decode_with_drops.SRCS += tools_common.h tools_common.c
decode_with_drops.SRCS += video_common.h
decode_with_drops.SRCS += video_reader.h video_reader.c
decode_with_drops.SRCS += aom_ports/mem_ops.h
decode_with_drops.SRCS += aom_ports/mem_ops_aligned.h
decode_with_drops.SRCS += aom_ports/msvc.h
decode_with_drops.GUID = CE5C53C4-8DDA-438A-86ED-0DDD3CDB8D26
decode_with_drops.DESCRIPTION = Drops frames while decoding
EXAMPLES-$(CONFIG_AV1_ENCODER) += set_maps.c
set_maps.SRCS += ivfenc.h ivfenc.c
set_maps.SRCS += tools_common.h tools_common.c
set_maps.SRCS += video_common.h
set_maps.SRCS += video_writer.h video_writer.c
set_maps.SRCS += aom_ports/msvc.h
set_maps.GUID = ECB2D24D-98B8-4015-A465-A4AF3DCC145F
set_maps.DESCRIPTION = Set active and ROI maps
ifeq ($(CONFIG_EXT_TILE),yes)
EXAMPLES-$(CONFIG_AV1_ENCODER) += lightfield_encoder.c
lightfield_encoder.SRCS += ivfenc.h ivfenc.c
lightfield_encoder.SRCS += tools_common.h tools_common.c
lightfield_encoder.SRCS += video_common.h
lightfield_encoder.SRCS += video_writer.h video_writer.c
lightfield_encoder.SRCS += aom_ports/msvc.h
lightfield_encoder.GUID = 73494FA6-4AF9-4763-8FBB-265C92402FD8
lightfield_encoder.DESCRIPTION = Lightfield encoder loop
EXAMPLES-$(CONFIG_AV1_DECODER) += lightfield_decoder.c
lightfield_decoder.SRCS += ivfdec.h ivfdec.c
lightfield_decoder.SRCS += tools_common.h tools_common.c
lightfield_decoder.SRCS += video_common.h
lightfield_decoder.SRCS += video_reader.h video_reader.c
lightfield_decoder.SRCS += aom_ports/mem_ops.h
lightfield_decoder.SRCS += aom_ports/mem_ops_aligned.h
lightfield_decoder.SRCS += aom_ports/msvc.h
lightfield_decoder.GUID = D3BBF1E9-2427-450D-BBFF-B2843C1D44CC
lightfield_decoder.DESCRIPTION = lightfield decoder loop
endif
ifeq ($(CONFIG_AV1_ENCODER),yes)
ifeq ($(CONFIG_AV1_DECODER),yes)
EXAMPLES-$(CONFIG_AV1_ENCODER) += aom_cx_set_ref.c
aom_cx_set_ref.SRCS += ivfenc.h ivfenc.c
aom_cx_set_ref.SRCS += tools_common.h tools_common.c
aom_cx_set_ref.SRCS += examples/encoder_util.h
aom_cx_set_ref.SRCS += examples/encoder_util.c
aom_cx_set_ref.SRCS += video_common.h
aom_cx_set_ref.SRCS += video_writer.h video_writer.c
aom_cx_set_ref.SRCS += aom_ports/msvc.h
aom_cx_set_ref.GUID = C5E31F7F-96F6-48BD-BD3E-10EBF6E8057A
aom_cx_set_ref.DESCRIPTION = AV1 set encoder reference frame
endif
endif
# Handle extra library flags depending on codec configuration
# We should not link to math library (libm) on RVCT
# when building for bare-metal targets
ifeq ($(CONFIG_OS_SUPPORT), yes)
CODEC_EXTRA_LIBS-$(CONFIG_AV1) += m
else
ifeq ($(CONFIG_GCC), yes)
CODEC_EXTRA_LIBS-$(CONFIG_AV1) += m
endif
endif
#
# End of specified files. The rest of the build rules should happen
# automagically from here.
#
# Examples need different flags based on whether we're building
# from an installed tree or a version controlled tree. Determine
# the proper paths.
ifeq ($(HAVE_ALT_TREE_LAYOUT),yes)
LIB_PATH-yes := $(SRC_PATH_BARE)/../lib
INC_PATH-yes := $(SRC_PATH_BARE)/../include
else
LIB_PATH-yes += $(if $(BUILD_PFX),$(BUILD_PFX),.)
INC_PATH-$(CONFIG_AV1_DECODER) += $(SRC_PATH_BARE)/av1
INC_PATH-$(CONFIG_AV1_ENCODER) += $(SRC_PATH_BARE)/av1
endif
INC_PATH-$(CONFIG_LIBYUV) += $(SRC_PATH_BARE)/third_party/libyuv/include
LIB_PATH := $(call enabled,LIB_PATH)
INC_PATH := $(call enabled,INC_PATH)
INTERNAL_CFLAGS = $(addprefix -I,$(INC_PATH))
INTERNAL_LDFLAGS += $(addprefix -L,$(LIB_PATH))
# Expand list of selected examples to build (as specified above)
UTILS = $(call enabled,UTILS)
EXAMPLES = $(addprefix examples/,$(call enabled,EXAMPLES))
ALL_EXAMPLES = $(UTILS) $(EXAMPLES)
UTIL_SRCS = $(foreach ex,$(UTILS),$($(ex:.c=).SRCS) $($(ex:.cc=).SRCS))
ALL_SRCS = $(foreach ex, $(ALL_EXAMPLES), \
$($(notdir $(ex:.c=)).SRCS) \
$($(notdir $(ex:.cc=)).SRCS))
CODEC_EXTRA_LIBS=$(sort $(call enabled,CODEC_EXTRA_LIBS))
# Expand all example sources into a variable containing all sources
# for that example (not just them main one specified in UTILS/EXAMPLES)
# and add this file to the list (for MSVS workspace generation)
EXAMPLES_C = $(filter-out %.cc, $(ALL_EXAMPLES))
$(foreach ex,$(EXAMPLES_C), \
$(eval $(notdir $(ex:.c=)).SRCS += $(ex) examples.mk))
EXAMPLES_CXX = $(filter-out %.c, $(ALL_EXAMPLES))
$(foreach ex,$(EXAMPLES_CXX), \
$(eval $(notdir $(ex:.cc=)).SRCS += $(ex) examples.mk))
# Create build/install dependencies for all examples. The common case
# is handled here. The MSVS case is handled below.
NOT_MSVS = $(if $(CONFIG_MSVS),,yes)
DIST-BINS-$(NOT_MSVS) += $(addprefix bin/,$(EXAMPLES_C:.c=$(EXE_SFX)))
DIST-BINS-$(NOT_MSVS) += $(addprefix bin/,$(EXAMPLES_CXX:.cc=$(EXE_SFX)))
INSTALL-BINS-$(NOT_MSVS) += $(addprefix bin/,$(UTILS:.c=$(EXE_SFX)))
DIST-SRCS-yes += $(ALL_SRCS)
INSTALL-SRCS-yes += $(UTIL_SRCS)
OBJS-$(NOT_MSVS) += $(call objs,$(ALL_SRCS))
BINS-$(NOT_MSVS) += $(addprefix $(BUILD_PFX), \
$(EXAMPLES_C:.c=$(EXE_SFX)))
BINS-$(NOT_MSVS) += $(addprefix $(BUILD_PFX), \
$(EXAMPLES_CXX:.cc=$(EXE_SFX)))
# Instantiate linker template for all examples.
CODEC_LIB=$(if $(CONFIG_DEBUG_LIBS),aom_g,aom)
ifneq ($(filter darwin%,$(TGT_OS)),)
SHARED_LIB_SUF=.dylib
else
ifneq ($(filter os2%,$(TGT_OS)),)
SHARED_LIB_SUF=_dll.a
else
SHARED_LIB_SUF=.so
endif
endif
CODEC_LIB_SUF=$(if $(CONFIG_SHARED),$(SHARED_LIB_SUF),.a)
$(foreach bin,$(BINS-yes),\
$(eval $(bin):$(LIB_PATH)/lib$(CODEC_LIB)$(CODEC_LIB_SUF))\
$(eval $(call linker_template,$(bin),\
$(call objs,$($(notdir $(bin:$(EXE_SFX)=)).SRCS)) \
-l$(CODEC_LIB) $(addprefix -l,$(CODEC_EXTRA_LIBS))\
)))
# The following pairs define a mapping of locations in the distribution
# tree to locations in the source/build trees.
INSTALL_MAPS += src/%.c %.c
INSTALL_MAPS += src/% $(SRC_PATH_BARE)/%
INSTALL_MAPS += bin/% %
INSTALL_MAPS += % %
# Set up additional MSVS environment
ifeq ($(CONFIG_MSVS),yes)
CODEC_LIB=$(if $(CONFIG_SHARED),aom,$(if $(CONFIG_STATIC_MSVCRT),aommt,aommd))
# This variable uses deferred expansion intentionally, since the results of
# $(wildcard) may change during the course of the Make.
VS_PLATFORMS = $(foreach d,$(wildcard */Release/$(CODEC_LIB).lib),$(word 1,$(subst /, ,$(d))))
INSTALL_MAPS += $(foreach p,$(VS_PLATFORMS),bin/$(p)/% $(p)/Release/%)
endif
# Build Visual Studio Projects. We use a template here to instantiate
# explicit rules rather than using an implicit rule because we want to
# leverage make's VPATH searching rather than specifying the paths on
# each file in ALL_EXAMPLES. This has the unfortunate side effect that
# touching the source files trigger a rebuild of the project files
# even though there is no real dependency there (the dependency is on
# the makefiles). We may want to revisit this.
define vcproj_template
$(1): $($(1:.$(VCPROJ_SFX)=).SRCS) aom.$(VCPROJ_SFX)
$(if $(quiet),@echo " [vcproj] $$@")
$(qexec)$$(GEN_VCPROJ)\
--exe\
--target=$$(TOOLCHAIN)\
--name=$$(@:.$(VCPROJ_SFX)=)\
--ver=$$(CONFIG_VS_VERSION)\
--proj-guid=$$($$(@:.$(VCPROJ_SFX)=).GUID)\
--src-path-bare="$(SRC_PATH_BARE)" \
$$(if $$(CONFIG_STATIC_MSVCRT),--static-crt) \
--out=$$@ $$(INTERNAL_CFLAGS) $$(CFLAGS) \
$$(INTERNAL_LDFLAGS) $$(LDFLAGS) -l$$(CODEC_LIB) $$^
endef
ALL_EXAMPLES_BASENAME := $(notdir $(ALL_EXAMPLES))
PROJECTS-$(CONFIG_MSVS) += $(ALL_EXAMPLES_BASENAME:.c=.$(VCPROJ_SFX))
INSTALL-BINS-$(CONFIG_MSVS) += $(foreach p,$(VS_PLATFORMS),\
$(addprefix bin/$(p)/,$(ALL_EXAMPLES_BASENAME:.c=.exe)))
$(foreach proj,$(call enabled,PROJECTS),\
$(eval $(call vcproj_template,$(proj))))
#
# Documentation Rules
#
%.dox: %.c
@echo " [DOXY] $@"
@mkdir -p $(dir $@)
@echo "/*!\page example_$(@F:.dox=) $(@F:.dox=)" > $@
@echo " \includelineno $(<F)" >> $@
@echo "*/" >> $@
samples.dox: examples.mk
@echo " [DOXY] $@"
@echo "/*!\page samples Sample Code" > $@
@echo " This SDK includes a number of sample applications."\
"Each sample documents a feature of the SDK in both prose"\
"and the associated C code."\
"The following samples are included: ">>$@
@$(foreach ex,$(sort $(notdir $(EXAMPLES:.c=))),\
echo " - \subpage example_$(ex) $($(ex).DESCRIPTION)" >> $@;)
@echo >> $@
@echo " In addition, the SDK contains a number of utilities."\
"Since these utilities are built upon the concepts described"\
"in the sample code listed above, they are not documented in"\
"pieces like the samples are. Their source is included here"\
"for reference. The following utilities are included:" >> $@
@$(foreach ex,$(sort $(UTILS:.c=)),\
echo " - \subpage example_$(ex) $($(ex).DESCRIPTION)" >> $@;)
@echo "*/" >> $@
CLEAN-OBJS += examples.doxy samples.dox $(ALL_EXAMPLES:.c=.dox)
DOCS-yes += examples.doxy samples.dox
examples.doxy: samples.dox $(ALL_EXAMPLES:.c=.dox)
@echo "INPUT += $^" > $@
|