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
|
# SPDX-FileCopyrightText: 2006 Matthias Kretz <kretz@kde.org>
# SPDX-FileCopyrightText: 2008 Alexander Neundorf <neundorf@kde.org>
# SPDX-FileCopyrightText: 2011 Michael Jansen <kde@michael-jansen.biz>
# SPDX-FileCopyrightText: 2021 Stefan Brüns <stefan.bruens@rwth-aachen.de>
#
# SPDX-License-Identifier: BSD-3-Clause
#[=======================================================================[.rst:
FindFFmpeg
----------
Try to find FFmpeg components.
The following components are available::
AVCODEC AVFILTER AVDEVICE AVFORMAT
AVUTIL SWRESAMPLE SWSCALE POSTPROCESS
If no components are specified in the find_module call, the following ones
will be chosen as default::
AVFORMAT AVUTIL AVCODEC
Imported Targets
^^^^^^^^^^^^^^^^
This module provides the following imported targets, if found:
``FFmpeg::FFmpeg``
For each <component> that was found
``FFmpeg::<component>``
For each <component> that was found
Result Variables
^^^^^^^^^^^^^^^^
This will define the following variables:
``FFMPEG_FOUND``
System has the all required components.
``FFMPEG_INCLUDE_DIRS``
Include directory necessary for using the required components headers.
``FFMPEG_LIBRARIES``
Link these to use the required ffmpeg components.
``FFMPEG_DEFINITIONS``
Compiler switches required for using the required ffmpeg components.
Additionally for each of the components, the following variables will be defined
``<component>_FOUND``
True if (the requestion version of) <component> is available
``<component>_INCLUDE_DIRS``
Include directory necessary for using the <component> headers
``<component>_LIBRARIES``
Link these to use <component>
``<component>_DEFINITIONS``
Compiler switches required for using <component>
``<component>_VERSION``
The components version
As the versions of the various FFmpeg components differ for a given release,
and CMake supports only one common version for all components, use the
following to specify required versions for multiple components:
.. code-block:: cmake
find_package(FFmpeg 57.48 COMPONENTS AVCODEC)
find_package(FFmpeg 57.40 COMPONENTS AVFORMAT)
find_package(FFmpeg 55.27 COMPONENTS AVUTIL)
Since 6.18.0.
#]=======================================================================]
include(FindPackageHandleStandardArgs)
if (NOT FFmpeg_FIND_COMPONENTS)
# The default components were taken from a survey over other FindFFMPEG.cmake files
set(FFmpeg_FIND_COMPONENTS AVCODEC AVFORMAT AVUTIL)
endif ()
list(LENGTH FFmpeg_FIND_COMPONENTS _numComponents)
if ((${_numComponents} GREATER 1) AND DEFINED ${FFmpeg_FIND_VERSION})
message(WARNING "Using a required version in combination with multiple COMPONENTS is not supported")
set(_FFmpeg_REQUIRED_VERSION 0)
elseif (DEFINED FFmpeg_FIND_VERSION)
set(_FFmpeg_REQUIRED_VERSION ${FFmpeg_FIND_VERSION})
else ()
set(_FFmpeg_REQUIRED_VERSION 0)
endif ()
set(_FFmpeg_ALL_COMPONENTS AVCODEC AVFILTER AVDEVICE AVFORMAT AVUTIL POSTPROCESS SWRESAMPLE SWSCALE)
### Macro: set_component_found
#
# Marks the given component as found if both *_LIBRARIES AND *_INCLUDE_DIRS is present.
macro(set_component_found _component )
if (${_component}_LIBRARIES AND ${_component}_INCLUDE_DIRS)
set(${_component}_FOUND TRUE)
set(FFmpeg_${_component}_FOUND TRUE)
endif ()
endmacro()
macro(create_target _component )
if(${_component}_FOUND AND NOT TARGET FFmpeg::${_component})
add_library(FFmpeg::${_component} UNKNOWN IMPORTED)
set_target_properties(FFmpeg::${_component} PROPERTIES
IMPORTED_LOCATION "${${_component}_LIBRARIES}"
INTERFACE_COMPILE_OPTIONS "${${_component}_DEFINITIONS}"
INTERFACE_INCLUDE_DIRECTORIES "${${_component}_INCLUDE_DIRS}"
)
endif()
endmacro()
### Macro: find_component
#
# Checks for the given component by invoking pkgconfig and then looking up the libraries and
# include directories.
macro(find_component _component _pkgconfig _library _header)
if (NOT WIN32)
# use pkg-config to get the directories and then use these values
# in the FIND_PATH() and FIND_LIBRARY() calls
find_package(PkgConfig)
if (PKG_CONFIG_FOUND)
pkg_check_modules(PC_${_component} QUIET ${_pkgconfig})
endif ()
endif (NOT WIN32)
find_path(${_component}_INCLUDE_DIRS ${_header}
HINTS
${PC_LIB${_component}_INCLUDEDIR}
${PC_LIB${_component}_INCLUDE_DIRS}
PATH_SUFFIXES
ffmpeg
)
find_library(${_component}_LIBRARIES NAMES ${_library}
HINTS
${PC_LIB${_component}_LIBDIR}
${PC_LIB${_component}_LIBRARY_DIRS}
)
set(${_component}_DEFINITIONS ${PC_${_component}_CFLAGS_OTHER} CACHE STRING "The ${_component} CFLAGS.")
set(${_component}_VERSION ${PC_${_component}_VERSION} CACHE STRING "The ${_component} version number.")
set_component_found(${_component})
create_target(${_component})
mark_as_advanced(
${_component}_INCLUDE_DIRS
${_component}_LIBRARIES
${_component}_DEFINITIONS
${_component}_VERSION)
endmacro()
# Check for cached results. If there are skip the costly part.
if (NOT FFMPEG_LIBRARIES)
# Check for all possible component.
find_component(AVCODEC libavcodec avcodec libavcodec/avcodec.h)
find_component(AVFILTER libavfilter avfilter libavfilter/avfilter.h)
find_component(AVFORMAT libavformat avformat libavformat/avformat.h)
find_component(AVDEVICE libavdevice avdevice libavdevice/avdevice.h)
find_component(AVUTIL libavutil avutil libavutil/avutil.h)
find_component(SWRESAMPLE libswresample swresample libswresample/swresample.h)
find_component(SWSCALE libswscale swscale libswscale/swscale.h)
find_component(POSTPROCESS libpostproc postproc libpostproc/postprocess.h)
# Check if the required components were found and add their stuff to the FFMPEG_* vars.
foreach (_component ${_FFmpeg_ALL_COMPONENTS})
if (${_component}_FOUND)
set(FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${${_component}_LIBRARIES})
set(FFMPEG_DEFINITIONS ${FFMPEG_DEFINITIONS} ${${_component}_DEFINITIONS})
list(APPEND FFMPEG_INCLUDE_DIRS ${${_component}_INCLUDE_DIRS})
endif ()
endforeach ()
# Build the include path with duplicates removed.
if (FFMPEG_INCLUDE_DIRS)
list(REMOVE_DUPLICATES FFMPEG_INCLUDE_DIRS)
endif ()
# cache the vars.
set(FFMPEG_INCLUDE_DIRS ${FFMPEG_INCLUDE_DIRS} CACHE STRING "The FFmpeg include directories." FORCE)
set(FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} CACHE STRING "The FFmpeg libraries." FORCE)
set(FFMPEG_DEFINITIONS ${FFMPEG_DEFINITIONS} CACHE STRING "The FFmpeg cflags." FORCE)
mark_as_advanced(FFMPEG_INCLUDE_DIRS
FFMPEG_LIBRARIES
FFMPEG_DEFINITIONS)
else ()
# Set the noncached _FOUND vars for the components.
foreach (_component ${_FFmpeg_ALL_COMPONENTS})
set_component_found(${_component})
create_target(${_component})
endforeach ()
endif ()
# Compile the list of required vars
unset(_FFmpeg_REQUIRED_VARS)
set(_FFmpeg_FOUND_LIBRARIES "")
foreach (_component ${FFmpeg_FIND_COMPONENTS})
if (${_component}_FOUND)
if (${_component}_VERSION VERSION_LESS _FFmpeg_REQUIRED_VERSION)
message(STATUS "${_component}: ${${_component}_VERSION} < ${_FFmpeg_REQUIRED_VERSION}")
unset(${_component}_FOUND)
endif ()
list(APPEND _FFmpeg_FOUND_LIBRARIES ${${_component}_LIBRARIES})
endif ()
list(APPEND _FFmpeg_REQUIRED_VARS ${_component}_LIBRARIES ${_component}_INCLUDE_DIRS ${_component}_FOUND)
endforeach ()
list(INSERT _FFmpeg_REQUIRED_VARS 0 _FFmpeg_FOUND_LIBRARIES)
# Give a nice error message if some of the required vars are missing.
find_package_handle_standard_args(FFmpeg
REQUIRED_VARS ${_FFmpeg_REQUIRED_VARS}
HANDLE_COMPONENTS)
# Create the general target
if(FFmpeg_FOUND AND NOT TARGET FFmpeg::FFmpeg)
add_library(FFmpeg::FFmpeg INTERFACE IMPORTED)
foreach(_component ${FFmpeg_FIND_COMPONENTS})
if(${_component}_FOUND AND TARGET FFmpeg::${_component})
target_link_libraries(FFmpeg::FFmpeg INTERFACE FFmpeg::${_component})
endif()
endforeach()
endif()
|
