20 #include "libavutil/attributes.h"
21 #include "libavutil/common.h"
35 for (i = 0; i < 64; i++) {
36 int j = src_scantable[i];
41 for (i = 0; i < 64; i++) {
61 for (i = 0; i < 64; i++)
62 idct_permutation[i] = i;
65 for (i = 0; i < 64; i++)
66 idct_permutation[i] = (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2);
69 for (i = 0; i < 64; i++)
70 idct_permutation[i] = ((i & 7) << 3) | (i >> 3);
73 for (i = 0; i < 64; i++)
74 idct_permutation[i] = (i & 0x24) | ((i & 3) << 3) | ((i >> 3) & 3);
78 "Internal error, IDCT permutation not set\n");
88 for (i = 0; i < 8; i++) {
89 pixels[0] = av_clip_uint8(block[0]);
90 pixels[1] = av_clip_uint8(block[1]);
91 pixels[2] = av_clip_uint8(block[2]);
92 pixels[3] = av_clip_uint8(block[3]);
93 pixels[4] = av_clip_uint8(block[4]);
94 pixels[5] = av_clip_uint8(block[5]);
95 pixels[6] = av_clip_uint8(block[6]);
96 pixels[7] = av_clip_uint8(block[7]);
109 for (i = 0; i < 8; i++) {
110 for (j = 0; j < 8; j++) {
113 else if (*block > 127)
116 *pixels = (
uint8_t) (*block + 128);
120 pixels += (line_size - 8);
130 for (i = 0; i < 8; i++) {
131 pixels[0] = av_clip_uint8(pixels[0] + block[0]);
132 pixels[1] = av_clip_uint8(pixels[1] + block[1]);
133 pixels[2] = av_clip_uint8(pixels[2] + block[2]);
134 pixels[3] = av_clip_uint8(pixels[3] + block[3]);
135 pixels[4] = av_clip_uint8(pixels[4] + block[4]);
136 pixels[5] = av_clip_uint8(pixels[5] + block[5]);
137 pixels[6] = av_clip_uint8(pixels[6] + block[6]);
138 pixels[7] = av_clip_uint8(pixels[7] + block[7]);
void ff_idctdsp_init_x86(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
int ff_init_scantable_permutation_x86(uint8_t *idct_permutation, enum idct_permutation_type perm_type)
void ff_simple_idct_add_10(uint8_t *dest, int line_size, int16_t *block)
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
void(* add_pixels_clamped)(const int16_t *block, uint8_t *pixels, int line_size)
void(* idct_add)(uint8_t *dest, int line_size, int16_t *block)
block -> idct -> add dest -> clip to unsigned 8 bit -> dest.
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
av_cold void ff_idctdsp_init_ppc(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
static void add_pixels_clamped_c(const int16_t *block, uint8_t *restrict pixels, int line_size)
void ff_faanidct(int16_t block[64])
static void put_pixels_clamped_c(const int16_t *block, uint8_t *restrict pixels, int line_size)
static void jref_idct_add(uint8_t *dest, int line_size, int16_t *block)
const uint8_t * scantable
void ff_simple_idct_put_10(uint8_t *dest, int line_size, int16_t *block)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void ff_faanidct_put(uint8_t *dest, int line_size, int16_t block[64])
Libavcodec external API header.
void(* idct_put)(uint8_t *dest, int line_size, int16_t *block)
block -> idct -> clip to unsigned 8 bit -> dest.
av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, enum idct_permutation_type perm_type)
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
uint8_t idct_permutation[64]
IDCT input permutation.
void ff_simple_idct_10(int16_t *block)
void ff_j_rev_dct(int16_t *data)
main external API structure.
av_cold void ff_idctdsp_init_arm(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
static void put_signed_pixels_clamped_c(const int16_t *block, uint8_t *restrict pixels, int line_size)
void(* put_pixels_clamped)(const int16_t *block, uint8_t *pixels, int line_size)
void ff_simple_idct_add_8(uint8_t *dest, int line_size, int16_t *block)
void ff_simple_idct_put_8(uint8_t *dest, int line_size, int16_t *block)
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
static void jref_idct_put(uint8_t *dest, int line_size, int16_t *block)
void ff_faanidct_add(uint8_t *dest, int line_size, int16_t block[64])
void(* put_signed_pixels_clamped)(const int16_t *block, uint8_t *pixels, int line_size)
void(* idct)(int16_t *block)
void ff_simple_idct_8(int16_t *block)
enum idct_permutation_type perm_type