33 unsigned high_bit_depth)
35 if (!avctx->
lowres && !high_bit_depth) {
void ff_add_pixels_clamped_armv6(const int16_t *block, uint8_t *pixels, ptrdiff_t line_size)
void ff_simple_idct_add_armv6(uint8_t *dest, ptrdiff_t line_size, int16_t *data)
Macro definitions for various function/variable attributes.
The exact code depends on how similar the blocks are and how related they are to the block
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
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
int flags
AV_CODEC_FLAG_*.
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
void ff_simple_idct_put_armv6(uint8_t *dest, ptrdiff_t line_size, int16_t *data)
#define FF_IDCT_SIMPLEARMV6
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
void(* idct_add)(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
block -> idct -> add dest -> clip to unsigned 8 bit -> dest.
void ff_simple_idct_armv6(int16_t *data)
void(* idct_put)(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
block -> idct -> clip to unsigned 8 bit -> dest.
Libavcodec external API header.
av_cold void ff_idctdsp_init_armv6(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
main external API structure.
void(* idct)(int16_t *block)
enum idct_permutation_type perm_type
void(* add_pixels_clamped)(const int16_t *block, uint8_t *av_restrict pixels, ptrdiff_t line_size)