44# Use of this source code is governed by a BSD-style license that can be
55# found in the LICENSE file.
66
7- """Creates a GYP include file for building FFmpeg from source.
7+ """Creates a GN include file for building FFmpeg from source.
88
99The way this works is a bit silly but it's easier than reverse engineering
10- FFmpeg's configure scripts and Makefiles. It scans through build directories for
11- object files then does a reverse lookup against the FFmpeg source tree to find
12- the corresponding C or assembly file.
10+ FFmpeg's configure scripts and Makefiles and manually maintaining chromium
11+ build files. It scans through build directories for object files then does a
12+ reverse lookup against the FFmpeg source tree to find the corresponding C or
13+ assembly file.
1314
14- Running build_ffmpeg.sh on each supported platform for all architecture is
15+ Running build_ffmpeg.py on each supported platform for all architectures is
1516required prior to running this script. See build_ffmpeg.py for details as well
1617as the documentation at:
1718
18- https://docs.google.com/document/d/14bqZ9NISsyEO3948wehhJ7wc9deTIz-yHUhF1MQp7Po/edit?pli=1#heading=h.x346hhrqw4lx
19+ https://docs.google.com/document/d/14bqZ9NISsyEO3948wehhJ7wc9deTIz-yHUhF1MQp7Po/edit
1920
2021Once you've built all platforms and architectures you may run this script.
21-
22- While this seems insane, reverse engineering and maintaining a gyp file by hand
23- is significantly more painful.
2422"""
2523
2624__author__ = '[email protected] (Andrew Scherkus)' 4442# Use of this source code is governed by a BSD-style license that can be
4543# found in the LICENSE file.
4644
47- # NOTE: this file is autogenerated by ffmpeg/chromium/scripts/generate_gyp .py
45+ # NOTE: this file is autogenerated by ffmpeg/chromium/scripts/generate_gn .py
4846
4947""" % (datetime .datetime .now ().year )
5048
51- GYP_HEADER = """
52- {
53- 'variables': {
54- """
55-
56- GYP_FOOTER = """ },
57- }
58- """
59-
60-
61- GYP_CONDITIONAL_BEGIN = """ 'conditions': [
62- """
63- GYP_CONDITIONAL_END = """ ], # conditions
64- """
65- GYP_CONDITIONAL_STANZA_BEGIN = """ ['%s', {
66- """
67- GYP_CONDITIONAL_STANZA_ITEM = """ '%s',
68- """
69- GYP_CONDITIONAL_STANZA_OUTPUT_ITEM = """ '<(shared_generated_dir)/%s',
70- """
71- GYP_CONDITIONAL_STANZA_END = """ }], # %s
72- """
73-
74- GYP_CONDITIONAL_C_SOURCE_STANZA_BEGIN = """ 'c_sources': [
75- """
76- GYP_CONDITIONAL_ASM_SOURCE_STANZA_BEGIN = """ 'asm_sources': [
77- """
78- GYP_CONDITIONAL_ITEM_STANZA_END = """ ],
79- """
80-
8149GN_HEADER = """import("//build/config/arm.gni")
8250import("ffmpeg_options.gni")
8351
10371GN_SOURCE_END = """]
10472"""
10573
106- # Controls GYP conditional stanza generation.
74+ # Controls conditional stanza generation.
10775Attr = enum ('ARCHITECTURE' , 'TARGET' , 'PLATFORM' )
10876SUPPORT_MATRIX = {
10977 Attr .ARCHITECTURE :
11482
11583
11684def NormalizeFilename (name ):
117- """ Removes leading path separators in an attempt to normalize paths."""
85+ """Removes leading path separators in an attempt to normalize paths."""
11886 return string .lstrip (name , os .sep )
11987
12088
@@ -200,7 +168,7 @@ def GetSourceFiles(source_dir):
200168 """
201169
202170 def IsSourceDir (d ):
203- return d not in [ '.git' , '.svn' ]
171+ return d != '.git'
204172
205173 source_files = []
206174 for root , dirs , files in os .walk (source_dir ):
@@ -345,80 +313,8 @@ def IsEmpty(self):
345313 """
346314 return (len (self .sources ) == 0 or len (self .conditions ) == 0 )
347315
348- def GenerateGypStanza (self ):
349- """Generates a gyp conditional stanza representing this source set.
350-
351- TODO(scherkus): Having all this special case condition optimizing logic in
352- here feels a bit dirty, but hey it works. Perhaps refactor if it starts
353- getting out of hand.
354-
355- Returns:
356- A string of gyp code.
357- """
358-
359- conjunctions = []
360- for condition in self .conditions :
361- if condition .ARCHITECTURE == '*' :
362- arch_condition = None
363- elif condition .ARCHITECTURE == 'arm-neon' :
364- arch_condition = 'target_arch == "arm" and arm_neon == 1'
365- else :
366- arch_condition = 'target_arch == "%s"' % condition .ARCHITECTURE
367-
368- if condition .TARGET == '*' :
369- target_condition = None
370- else :
371- target_condition = 'ffmpeg_branding == "%s"' % condition .TARGET
372-
373- if condition .PLATFORM == '*' :
374- platform_condition = None
375- else :
376- platform_condition = 'OS == "%s"' % condition .PLATFORM
377-
378- conjunction_parts = filter (
379- None , [platform_condition , arch_condition , target_condition ])
380- conjunctions .append (' and ' .join (conjunction_parts ))
381-
382- # If there is more that one clause, wrap various conditions in parens
383- # before joining.
384- if len (conjunctions ) > 1 :
385- conjunctions = ['(%s)' % x for x in conjunctions ]
386-
387- # Sort conjunctions to make order deterministic.
388- joined_conjunctions = ' or ' .join (sorted (conjunctions ))
389- if not joined_conjunctions :
390- joined_conjunctions = '(1)'
391-
392- stanza = []
393- stanza += GYP_CONDITIONAL_STANZA_BEGIN % (joined_conjunctions )
394-
395- self .sources = sorted (n .replace ('\\ ' , '/' ) for n in self .sources )
396-
397- # Write out all C sources.
398- c_sources = filter (IsCFile , self .sources )
399- if c_sources :
400- stanza += GYP_CONDITIONAL_C_SOURCE_STANZA_BEGIN
401- for name in c_sources :
402- stanza += GYP_CONDITIONAL_STANZA_ITEM % (name )
403- stanza += GYP_CONDITIONAL_ITEM_STANZA_END
404-
405- # Write out all assembly sources.
406- asm_sources = filter (IsAssemblyFile , self .sources )
407- if asm_sources :
408- stanza += GYP_CONDITIONAL_ASM_SOURCE_STANZA_BEGIN
409- for name in asm_sources :
410- stanza += GYP_CONDITIONAL_STANZA_ITEM % (name )
411- stanza += GYP_CONDITIONAL_ITEM_STANZA_END
412-
413- stanza += GYP_CONDITIONAL_STANZA_END % (joined_conjunctions )
414- return '' .join (stanza )
415-
416316 def GenerateGnStanza (self ):
417- """Generates a gyp conditional stanza representing this source set.
418-
419- TODO(scherkus): Having all this special case condition optimizing logic in
420- here feels a bit dirty, but hey it works. Perhaps refactor if it starts
421- getting out of hand.
317+ """Generates a gn conditional stanza representing this source set.
422318 """
423319
424320 conjunctions = []
@@ -708,19 +604,6 @@ def ParseOptions():
708604 return options , args
709605
710606
711- def WriteGyp (fd , disjoint_sets ):
712- fd .write (COPYRIGHT )
713- fd .write (GYP_HEADER )
714-
715- # Generate conditional stanza for each disjoint source set.
716- fd .write (GYP_CONDITIONAL_BEGIN )
717- for s in disjoint_sets :
718- fd .write (s .GenerateGypStanza ())
719- fd .write (GYP_CONDITIONAL_END )
720-
721- fd .write (GYP_FOOTER )
722-
723-
724607def WriteGn (fd , disjoint_sets ):
725608 fd .write (COPYRIGHT )
726609 fd .write (GN_HEADER )
@@ -730,7 +613,7 @@ def WriteGn(fd, disjoint_sets):
730613 fd .write (s .GenerateGnStanza ())
731614
732615
733- # Lists of files that are exempt from searching in GetIncludeSources .
616+ # Lists of files that are exempt from searching in GetIncludedSources .
734617IGNORED_INCLUDE_FILES = [
735618 # Chromium generated files
736619 'config.h' ,
@@ -1035,15 +918,11 @@ def main():
1035918 print 'License checks passed.'
1036919 UpdateCredits (sources_to_check , source_dir )
1037920
1038- def WriteOutputFile (outfile , func ):
1039- output_name = os .path .join (options .source_dir , outfile )
1040- print 'Output:' , output_name
1041-
1042- with open (output_name , 'w' ) as fd :
1043- func (fd , sets )
921+ gn_file_name = os .path .join (options .source_dir , 'ffmpeg_generated.gni' )
922+ print 'Writing:' , gn_file_name
923+ with open (gn_file_name , 'w' ) as fd :
924+ WriteGn (fd , sets )
1044925
1045- WriteOutputFile ('ffmpeg_generated.gni' , WriteGn )
1046- WriteOutputFile ('ffmpeg_generated.gypi' , WriteGyp )
1047926
1048927if __name__ == '__main__' :
1049928 main ()
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