32 #define randomize_buffers(buf, size) \ 35 for (j = 0; j < size; j+=4) \ 36 AV_WN32(buf + j, rnd()); \ 39 #define SRC_PIXELS 128 43 #define MAX_FILTER_WIDTH 40 44 #define FILTER_SIZES 5 45 static const int filter_sizes[
FILTER_SIZES] = { 4, 8, 16, 32, 40 };
47 #define HSCALE_PAIRS 2 69 const int32_t *filterPos,
int filterSize);
79 width = filter_sizes[fsi];
81 ctx->
srcBpc = hscale_pairs[hpi][0];
82 ctx->
dstBpc = hscale_pairs[hpi][1];
101 for (j = 0; j <
width; j++) {
102 filter[i * width + j] = -((1 << 14) / (width - 1));
104 filter[i * width + (
rnd() %
width)] = ((1 << 15) - 1);
112 filter[SRC_PIXELS * width +
i] =
rnd();
117 memset(dst0, 0, SRC_PIXELS *
sizeof(dst0[0]));
118 memset(dst1, 0, SRC_PIXELS *
sizeof(dst1[0]));
120 call_ref(
NULL, dst0, SRC_PIXELS, src, filter, filterPos, width);
121 call_new(
NULL, dst1, SRC_PIXELS, src, filter, filterPos, width);
122 if (memcmp(dst0, dst1, SRC_PIXELS *
sizeof(dst0[0])))
124 bench_new(
NULL, dst0, SRC_PIXELS, src, filter, filterPos, width);
void checkasm_check_sw_scale(void)
void(* hcScale)(struct SwsContext *c, int16_t *dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)
static void check_hscale(void)
Memory handling functions.
av_warn_unused_result int sws_init_context(struct SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter)
Initialize the swscaler context sws_context.
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
#define LOCAL_ALIGNED_32(t, v,...)
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce then the filter should push the output frames on the output link immediately As an exception to the previous rule if the input frame is enough to produce several output frames then the filter needs output only at least one per link The additional frames can be left buffered in the filter
int hLumFilterSize
Horizontal filter size for luma/alpha pixels.
SwsFunc ff_getSwsFunc(SwsContext *c)
Return function pointer to fastest main scaler path function depending on architecture and available ...
int hChrFilterSize
Horizontal filter size for chroma pixels.
void sws_freeContext(struct SwsContext *swsContext)
Free the swscaler context swsContext.
#define randomize_buffers(buf, size)
#define declare_func_emms(cpu_flags, ret,...)
int dstW
Width of destination luma/alpha planes.
#define AV_CPU_FLAG_MMX
standard MMX
#define check_func(func,...)
struct SwsContext * sws_alloc_context(void)
Allocate an empty SwsContext.
common internal and external API header