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INCLUDE(CMakePushCheckState)
INCLUDE(CheckCSourceCompiles)
FIND_PATH(G729_INCLUDE_DIR bcg729/decoder.h)
FIND_LIBRARY(G729_LIBRARY NAMES bcg729)
IF(G729_INCLUDE_DIR AND G729_LIBRARY)
SET(G729_FOUND TRUE)
# The bcg729 API was changed in 1.0.2 to add support for G.729 Annex B.
# This checks whether we are dealing with the old or new API.
CMAKE_PUSH_CHECK_STATE()
SET(CMAKE_REQUIRED_INCLUDES "${INCLUDE_DIRECTORIES}" "${G729_INCLUDE_DIR}")
SET(CMAKE_REQUIRED_LIBRARIES "${G729_LIBRARY}")
SET(CMAKE_REQUIRED_QUIET TRUE)
# Try to compile something using the old (pre-1.0.2) API.
#
# We cannot do it the other way around, as initBcg729EncoderChannel()
# did not have a prototype before 1.0.2, thus compilation would not fail
# when passing it an extra argument.
CHECK_C_SOURCE_COMPILES("
#include <bcg729/encoder.h>
int main() {
/* This function requires an argument since 1.0.2 */
initBcg729EncoderChannel();
return 0;
}
" G729_OLD_API)
CMAKE_POP_CHECK_STATE()
IF (G729_OLD_API)
SET(G729_ANNEX_B FALSE)
ELSE (G729_OLD_API)
SET(G729_ANNEX_B TRUE)
ENDIF (G729_OLD_API)
ENDIF(G729_INCLUDE_DIR AND G729_LIBRARY)
IF(G729_FOUND)
IF (NOT G729_FIND_QUIETLY)
MESSAGE(STATUS "Found bcg729 includes: ${G729_INCLUDE_DIR}/bcg729/decoder.h")
MESSAGE(STATUS "Found bcg729 library: ${G729_LIBRARY}")
IF (G729_ANNEX_B)
MESSAGE(STATUS "bcg729 supports Annex B; using the new (1.0.2) API")
ELSE (G729_ANNEX_B)
MESSAGE(STATUS "bcg729 does not support Annex B; using the old (pre-1.0.2) API")
ENDIF (G729_ANNEX_B)
ENDIF (NOT G729_FIND_QUIETLY)
ELSE(G729_FOUND)
IF (G729_FIND_REQUIRED)
MESSAGE(FATAL_ERROR "Could NOT find bcg729 development files")
ENDIF (G729_FIND_REQUIRED)
ENDIF(G729_FOUND)
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