The ffmpeg core not support the usage of HW based video decoders.
Core options to configure the HW decoder to use is provided.
Proper fallback to the SW based decoder is implemented.
Currently the decoder loop in single threaded and is limited by
the color conversion that is done in software.
The frame based threading provided by ffmpeg also currently doesn't
seem to provide any benefits in configuring it.
cores/libretro-imageviewer/image_core.c:75:59: warning: adding 'int' to a string does not append to the string [-Wstring-plus-int]
static const char* IMAGE_CORE_PREFIX(valid_extensions) = 1+ /* to remove the first |, the alternative is 25 extra lines of ifdef/etc */
~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cores/libretro-imageviewer/image_core.c:75:59: note: use array indexing to silence this warning
1 warning generated.
This fixes a few subtle problems with passing CFLAGS and CXXFLAGS as
environment variables for configure.
First it will now only add these variables to config.mk when they are
actually set. If they are unset then the default optimizations in the
Makefile are set. This avoids passing more than one conflicting
optimization level to the compiler.
Next all CFLAGS are added to CXXFLAGS to avoid issues with forgetting to
set both CFLAGS and CXXFLAGS. This results in the cxx compiler getting
passed several redundant optimization levels when both the CFLAGS and
CXXFLAGS environment variabls are used. Now these uses of CFLAGS in
Makefile.common are set to DEF_FLAGS. This allows adding $(DEF_FLAGS)
to the CXXFLAGS variable without adding redundant flags from CFLAGS.
v2: Update other build files.
Supports multiple capture and output modes with deinterlacing
New dummy mode for testing the core even without a capture device
Ability to display frametimes
alternate_hack mode allows capture cards without alternate capture mode
to capture progressive or interlaced inputs at 16ms rather than 33ms
Nils Hasenbanck