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audio: Redesigned audio conversion code for SDL3.

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- SDL_AudioCVT is gone, even internally.
- libsamplerate is gone (I suspect our resampler is finally Good Enough).
- Cleanups and improvements to audio conversion interfaces.
- SDL_AudioStream can change its input/output format/rate/channels on the fly!
This commit is contained in:
Ryan C. Gordon
2023-04-01 22:29:30 -04:00
parent 44bec9c01c
commit e5a6c24c82
20 changed files with 1434 additions and 2369 deletions
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cmake/sdlchecks.cmake
-47
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@@ -240,53 +240,6 @@ macro(CheckSNDIO)
endif()
endmacro()
# Requires:
# - SDL_LIBSAMPLERATE
# Optional:
# - SDL_LIBSAMPLERATE_SHARED opt
# - HAVE_SDL_LOADSO opt
macro(CheckLibSampleRate)
if(SDL_LIBSAMPLERATE)
find_package(SampleRate QUIET)
if(SampleRate_FOUND AND TARGET SampleRate::samplerate)
set(HAVE_LIBSAMPLERATE TRUE)
if(SDL_LIBSAMPLERATE_SHARED)
target_include_directories(sdl-build-options INTERFACE $<TARGET_PROPERTY:SampleRate::samplerate,INTERFACE_INCLUDE_DIRECTORIES>)
if(NOT HAVE_SDL_LOADSO)
message_warn("You must have SDL_LoadObject() support for dynamic libsamplerate loading")
else()
get_property(_samplerate_type TARGET SampleRate::samplerate PROPERTY TYPE)
if(_samplerate_type STREQUAL "SHARED_LIBRARY")
set(HAVE_LIBSAMPLERATE_SHARED TRUE)
if(WIN32)
set(SDL_LIBSAMPLERATE_DYNAMIC "\"$<TARGET_FILE_NAME:SampleRate::samplerate>\"")
else()
set(SDL_LIBSAMPLERATE_DYNAMIC "\"$<TARGET_SONAME_FILE_NAME:SampleRate::samplerate>\"")
endif()
endif()
endif()
else()
target_link_libraries(sdl-build-options INTERFACE SampleRate::samplerate)
endif()
else()
check_include_file(samplerate.h HAVE_LIBSAMPLERATE_H)
if(HAVE_LIBSAMPLERATE_H)
set(HAVE_LIBSAMPLERATE TRUE)
if(SDL_LIBSAMPLERATE_SHARED AND NOT HAVE_SDL_LOADSO)
message_warn("You must have SDL_LoadObject() support for dynamic libsamplerate loading")
endif()
FindLibraryAndSONAME("samplerate")
if(SDL_LIBSAMPLERATE_SHARED AND SAMPLERATE_LIB AND HAVE_SDL_LOADSO)
set(SDL_LIBSAMPLERATE_DYNAMIC "\"${SAMPLERATE_LIB_SONAME}\"")
set(HAVE_LIBSAMPLERATE_SHARED TRUE)
else()
list(APPEND SDL_EXTRA_LIBS samplerate)
endif()
endif()
endif()
endif()
endmacro()
# Requires:
# - n/a
# Optional: