static void error(const char *err)
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
static atomic_int cpu_flags
void ff_ttaenc_filter_process_ssse3(int32_t *qm, int32_t *dx, int32_t *dl, int32_t *error, int32_t *in, int32_t shift, int32_t round)
av_cold void ff_ttaencdsp_init_x86(TTAEncDSPContext *c)
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
static av_always_inline av_const double round(double x)
void ff_ttaenc_filter_process_sse4(int32_t *qm, int32_t *dx, int32_t *dl, int32_t *error, int32_t *in, int32_t shift, int32_t round)
#define EXTERNAL_SSE4(flags)
static int shift(int a, int b)
#define EXTERNAL_SSSE3(flags)