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+##
+## Copyright (c) 2017, 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.
+##
+if (NOT AOM_DOCS_CMAKE_)
+set(AOM_DOCS_CMAKE_ 1)
+
+cmake_minimum_required(VERSION 3.5)
+
+set(AOM_DOXYFILE "${AOM_CONFIG_DIR}/doxyfile")
+set(AOM_DOXYGEN_CONFIG_TEMPLATE "libs.doxy_template")
+set(AOM_DOXYGEN_OUTPUT_DIR "${AOM_CONFIG_DIR}/dox")
+set(AOM_DOXYGEN_SECTIONS "av1")
+
+set(AOM_DOXYGEN_SOURCES
+ "${AOM_ROOT}/aom/aom.h"
+ "${AOM_ROOT}/aom/aom_codec.h"
+ "${AOM_ROOT}/aom/aom_frame_buffer.h"
+ "${AOM_ROOT}/aom/aom_image.h"
+ "${AOM_ROOT}/aom/aom_integer.h"
+ "${AOM_ROOT}/keywords.dox"
+ "${AOM_ROOT}/mainpage.dox"
+ "${AOM_ROOT}/usage.dox")
+
+if (CONFIG_AV1_DECODER)
+ set(AOM_DOXYGEN_EXAMPLE_SOURCES
+ ${AOM_DOXYGEN_EXAMPLE_SOURCES}
+ "${AOM_ROOT}/aomdec.c"
+ "${AOM_ROOT}/examples/decode_to_md5.c"
+ "${AOM_ROOT}/examples/decode_with_drops.c"
+ "${AOM_ROOT}/examples/simple_decoder.c")
+
+ set(AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS
+ ${AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS}
+ "Full featured decoder."
+ "Frame by frame MD5 checksum."
+ "Drops frames while decoding."
+ "Simplified decoder loop.")
+
+ set(AOM_DOXYGEN_SECTIONS ${AOM_DOXYGEN_SECTIONS} "av1_decoder decoder")
+
+ set(AOM_DOXYGEN_SOURCES
+ ${AOM_DOXYGEN_SOURCES}
+ "${AOM_ROOT}/aom/aom_decoder.h"
+ "${AOM_ROOT}/aom/aomdx.h"
+ "${AOM_ROOT}/usage_dx.dox")
+
+ if (CONFIG_ANALYZER)
+ set(AOM_DOXYGEN_EXAMPLE_SOURCES
+ ${AOM_DOXYGEN_EXAMPLE_SOURCES}
+ "${AOM_ROOT}examples/analyzer.cc")
+
+ set(AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS
+ ${AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS}
+ "Bitstream analyzer.")
+ endif ()
+
+ if (CONFIG_INSPECTION)
+ set(AOM_DOXYGEN_EXAMPLE_SOURCES
+ ${AOM_DOXYGEN_EXAMPLE_SOURCES}
+ "${AOM_ROOT}/examples/inspect.c")
+
+ set(AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS
+ ${AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS}
+ "Bitstream inspector.")
+ endif ()
+endif ()
+
+if (CONFIG_AV1_ENCODER)
+ set(AOM_DOXYGEN_EXAMPLE_SOURCES
+ ${AOM_DOXYGEN_EXAMPLE_SOURCES}
+ "${AOM_ROOT}/aomenc.c"
+ "${AOM_ROOT}/examples/lossless_encoder.c"
+ "${AOM_ROOT}/examples/set_maps.c"
+ "${AOM_ROOT}/examples/simple_encoder.c"
+ "${AOM_ROOT}/examples/twopass_encoder.c")
+
+ set(AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS
+ ${AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS}
+ "Full featured encoder."
+ "Simplified lossless encoder."
+ "Set active and ROI maps."
+ "Simplified encoder loop."
+ "Two-pass encoder loop.")
+
+ set(AOM_DOXYGEN_SECTIONS ${AOM_DOXYGEN_SECTIONS} "av1_encoder encoder")
+
+ set(AOM_DOXYGEN_SOURCES
+ ${AOM_DOXYGEN_SOURCES}
+ "${AOM_ROOT}/aom/aomcx.h"
+ "${AOM_ROOT}/aom/aom_encoder.h"
+ "${AOM_ROOT}/usage_cx.dox")
+endif ()
+
+if (CONFIG_AV1_DECODER AND CONFIG_AV1_ENCODER)
+ set(AOM_DOXYGEN_EXAMPLE_SOURCES
+ ${AOM_DOXYGEN_EXAMPLE_SOURCES}
+ "${AOM_ROOT}/examples/aom_cx_set_ref.c")
+
+ set(AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS
+ ${AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS}
+ "Set encoder reference frame.")
+endif ()
+
+# Iterates over list named by $list_name and appends each item to $AOM_DOXYFILE
+# as values assigned to $var_name with no line breaks between list items.
+# Appends a new line after the entire config variable is expanded.
+function (write_cmake_list_to_doxygen_config_var var_name list_name)
+ unset(output_string)
+ foreach (list_item ${${list_name}})
+ set(output_string "${output_string} ${list_item} ")
+ endforeach ()
+ string(STRIP "${output_string}" output_string)
+ file(APPEND "${AOM_DOXYFILE}" "${var_name} += ${output_string}\n")
+endfunction ()
+
+function (get_name file_path name_var)
+ get_filename_component(file_basename ${file_path} NAME)
+ get_filename_component(${name_var} ${file_basename} NAME_WE)
+ set(${name_var} ${${name_var}} PARENT_SCOPE)
+endfunction ()
+
+function (setup_documentation_targets)
+ # Sanity check: the lengths of these lists must match.
+ list(LENGTH AOM_DOXYGEN_EXAMPLE_SOURCES num_sources)
+ list(LENGTH AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS num_descs)
+ if (NOT ${num_sources} EQUAL ${num_descs})
+ message(FATAL_ERROR "Unqeual example and description totals.")
+ endif ()
+
+ # Take the list of examples and produce example_basename.dox for each file in
+ # the list.
+ file(MAKE_DIRECTORY "${AOM_DOXYGEN_OUTPUT_DIR}")
+ foreach (example_file ${AOM_DOXYGEN_EXAMPLE_SOURCES})
+ unset(example_basename)
+ get_name("${example_file}" "example_name")
+ set(example_dox "${AOM_DOXYGEN_OUTPUT_DIR}/${example_name}.dox")
+ set(dox_string "/*!\\page example_${example_name} ${example_name}\n")
+ set(dox_string "${dox_string} \\includelineno ${example_file}\n*/\n")
+ file(WRITE "${example_dox}" ${dox_string})
+ set(AOM_DOXYGEN_SOURCES ${AOM_DOXYGEN_SOURCES} "${example_dox}")
+ endforeach ()
+
+ # Generate samples.dox, an index page that refers to the example_basename.dox
+ # files that were just created.
+ set(samples_header
+"
+/*!\\page samples Sample Code
+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:
+")
+
+ set(utils_desc
+"
+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:
+")
+
+ # Write the description for the samples section.
+ set(samples_dox "${AOM_CONFIG_DIR}/samples.dox")
+ file(WRITE "${samples_dox}" "${samples_header}\n")
+
+ # Iterate over $AOM_DOXYGEN_EXAMPLE_SOURCES and
+ # $AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS and massage example names as required by
+ # AV1's doxygen setup.
+ math(EXPR max_example_index "${num_sources} - 1")
+ foreach (NUM RANGE ${max_example_index})
+ list(GET AOM_DOXYGEN_EXAMPLE_SOURCES ${NUM} ex_name)
+ get_name("${ex_name}" "ex_name")
+
+ # AV1's doxygen lists aomdec and aomenc as utils apart from the examples.
+ # Save the indexes for another pass.
+ if ("${ex_name}" MATCHES "aomdec\|aomenc")
+ set(util_indexes "${util_indexes}" "${NUM}")
+ continue()
+ endif ()
+ list(GET AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS ${NUM} ex_desc)
+ file(APPEND "${samples_dox}" " - \\subpage example_${ex_name} ${ex_desc}\n")
+ endforeach ()
+
+ # Write the description and index for the utils.
+ file(APPEND "${samples_dox}" "${utils_desc}\n")
+ foreach (util_index ${util_indexes})
+ list(GET AOM_DOXYGEN_EXAMPLE_SOURCES ${util_index} ex_name)
+ get_name("${ex_name}" "ex_name")
+ list(GET AOM_DOXYGEN_EXAMPLE_DESCRIPTIONS ${util_index} ex_desc)
+ file(APPEND "${samples_dox}" " - \\subpage example_${ex_name} ${ex_desc}\n")
+ endforeach ()
+ file(APPEND "${samples_dox}" "*/")
+
+ # Add $samples_dox to the doxygen inputs.
+ get_filename_component(samples_dox ${samples_dox} NAME)
+ set(AOM_DOXYGEN_SOURCES ${AOM_DOXYGEN_SOURCES} ${samples_dox})
+
+ # Generate libaom's doxyfile.
+ file(COPY "${AOM_ROOT}/${AOM_DOXYGEN_CONFIG_TEMPLATE}"
+ DESTINATION "${AOM_CONFIG_DIR}")
+ file(RENAME
+ "${AOM_CONFIG_DIR}/${AOM_DOXYGEN_CONFIG_TEMPLATE}" "${AOM_DOXYFILE}")
+ file(APPEND "${AOM_DOXYFILE}"
+ "EXAMPLE_PATH += ${AOM_ROOT} ${AOM_ROOT}/examples\n")
+ file(APPEND
+ "${AOM_DOXYFILE}" "INCLUDE_PATH += ${AOM_CONFIG_DIR} ${AOM_ROOT}\n")
+ file(APPEND "${AOM_DOXYFILE}"
+ "STRIP_FROM_PATH += ${AOM_ROOT} ${AOM_CONFIG_DIR}\n")
+ write_cmake_list_to_doxygen_config_var("INPUT" "AOM_DOXYGEN_SOURCES")
+ write_cmake_list_to_doxygen_config_var("ENABLED_SECTIONS"
+ "AOM_DOXYGEN_SECTIONS")
+
+ # Add the doxygen generation rule.
+ add_custom_target(docs ALL
+ COMMAND "${DOXYGEN_EXECUTABLE}" "${AOM_DOXYFILE}"
+ DEPENDS "${AOM_DOXYFILE}" ${AOM_DOXYGEN_SOURCES}
+ ${AOM_DOXYGEN_EXAMPLE_SOURCES}
+ SOURCES "${AOM_DOXYFILE}" ${AOM_DOXYGEN_SOURCES}
+ ${AOM_DOXYGEN_EXAMPLE_SOURCES})
+endfunction ()
+
+endif () # AOM_DOCS_CMAKE_