IDCTDSPContext Struct Reference

#include <idctdsp.h>

Data Fields
void(*	put_pixels_clamped )(const int16_t *block, uint8_t *pixels, int line_size)
void(*	put_signed_pixels_clamped )(const int16_t *block, uint8_t *pixels, int line_size)
void(*	add_pixels_clamped )(const int16_t *block, uint8_t *pixels, int line_size)
void(*	idct )(int16_t *block)
void(*	idct_put )(uint8_t *dest, int line_size, int16_t *block)
	block -> idct -> clip to unsigned 8 bit -> dest.
void(*	idct_add )(uint8_t *dest, int line_size, int16_t *block)
	block -> idct -> add dest -> clip to unsigned 8 bit -> dest.
uint8_t	idct_permutation [64]
	IDCT input permutation.
int	idct_permutation_type

Detailed Description

Definition at line 42 of file idctdsp.h.

Field Documentation

void(* IDCTDSPContext::put_pixels_clamped)(const int16_t *block, uint8_t *pixels, int line_size)

Definition at line 44 of file idctdsp.h.

Referenced by ff_idctdsp_init(), ff_idctdsp_init_alpha(), ff_idctdsp_init_arm(), ff_idctdsp_init_neon(), ff_idctdsp_init_x86(), and vc1_decode_i_blocks().

void(* IDCTDSPContext::put_signed_pixels_clamped)(const int16_t *block, uint8_t *pixels, int line_size)

Definition at line 47 of file idctdsp.h.

Referenced by aic_decode_slice(), ff_idctdsp_init(), ff_idctdsp_init_neon(), ff_idctdsp_init_x86(), vc1_decode_b_mb(), vc1_decode_b_mb_intfi(), vc1_decode_b_mb_intfr(), vc1_decode_i_blocks(), vc1_decode_p_mb(), vc1_decode_p_mb_intfi(), vc1_decode_p_mb_intfr(), and vc1_put_signed_blocks_clamped().

void(* IDCTDSPContext::add_pixels_clamped)(const int16_t *block, uint8_t *pixels, int line_size)

Definition at line 50 of file idctdsp.h.

Referenced by ff_idctdsp_init(), ff_idctdsp_init_alpha(), ff_idctdsp_init_arm(), ff_idctdsp_init_armv6(), ff_idctdsp_init_neon(), ff_idctdsp_init_x86(), and vc1_decode_p_block().

void(* IDCTDSPContext::idct)(int16_t *block)

Definition at line 54 of file idctdsp.h.

Referenced by aic_decode_slice(), dnxhd_calc_bits_thread(), ff_idctdsp_init(), ff_idctdsp_init_alpha(), ff_idctdsp_init_arm(), ff_idctdsp_init_armv5te(), ff_idctdsp_init_armv6(), ff_idctdsp_init_neon(), ff_idctdsp_init_ppc(), ff_idctdsp_init_x86(), ff_wmv2_common_init(), ff_xvmc_decode_mb(), filter(), and jpg_decode_data().

void(* IDCTDSPContext::idct_put)(uint8_t *dest, int line_size, int16_t *block)

block -> idct -> clip to unsigned 8 bit -> dest.

(-1392, 0, 0, ...) -> idct -> (-174, -174, ...) -> put -> (0, 0, ...)

Parameters

line_size

size in bytes of a horizontal line of dest

Definition at line 61 of file idctdsp.h.

Referenced by decode(), dnxhd_decode_macroblock(), dvvideo_decode_init(), ff_idctdsp_init(), ff_idctdsp_init_alpha(), ff_idctdsp_init_arm(), ff_idctdsp_init_armv5te(), ff_idctdsp_init_armv6(), ff_idctdsp_init_neon(), ff_idctdsp_init_ppc(), ff_idctdsp_init_x86(), ff_wmv2_common_init(), idct_put(), mjpeg_decode_scan(), mjpeg_decode_scan_progressive_ac(), MPV_decode_mb_internal(), and put_dct().

void(* IDCTDSPContext::idct_add)(uint8_t *dest, int line_size, int16_t *block)

block -> idct -> add dest -> clip to unsigned 8 bit -> dest.

Parameters

line_size

size in bytes of a horizontal line of dest

Definition at line 68 of file idctdsp.h.

Referenced by add_dct(), add_dequant_dct(), ff_idctdsp_init(), ff_idctdsp_init_alpha(), ff_idctdsp_init_arm(), ff_idctdsp_init_armv5te(), ff_idctdsp_init_armv6(), ff_idctdsp_init_neon(), ff_idctdsp_init_ppc(), ff_idctdsp_init_x86(), ff_wmv2_common_init(), and rd8x8_c().

uint8_t IDCTDSPContext::idct_permutation[64]

IDCT input permutation.

Several optimized IDCTs need a permutated input (relative to the normal order of the reference IDCT). This permutation must be performed before the idct_put/add. Note, normally this can be merged with the zigzag/alternate scan
An example to avoid confusion:

• (->decode coeffs -> zigzag reorder -> dequant -> reference IDCT -> ...)
• (x -> reference DCT -> reference IDCT -> x)
• (x -> reference DCT -> simple_mmx_perm = idct_permutation -> simple_idct_mmx -> x)
• (-> decode coeffs -> zigzag reorder -> simple_mmx_perm -> dequant -> simple_idct_mmx -> ...)

Definition at line 85 of file idctdsp.h.

Referenced by aic_decode_init(), dct_quantize_refine(), dct_quantize_trellis_c(), decide_ac_pred(), decode_init(), decode_vol_header(), decode_vop_header(), dnxhd_init_qmat(), dnxhd_init_vlc(), dvvideo_decode_init(), encode_picture(), ff_cavs_init(), ff_convert_matrix(), ff_dct_common_init(), ff_dct_quantize_c(), ff_h263_pred_acdc(), ff_idctdsp_init(), ff_mjpeg_decode_init(), ff_mpeg4_pred_ac(), ff_MPV_encode_init(), ff_msmpeg4_common_init(), ff_rtjpeg_decode_init(), ff_rtjpeg_init(), ff_wmv2_common_init(), fill_quantization_matrices(), filter(), jpg_init(), ljpeg_encode_init(), load_matrix(), mimic_decode_init(), mpeg1_decode_sequence(), mpeg_decode_init(), mpeg_decode_picture_coding_extension(), MPV_decode_mb_internal(), restore_ac_coeffs(), tqi_decode_init(), vaapi_mpeg2_start_frame(), vaapi_mpeg4_start_frame(), and vcr2_init_sequence().

int IDCTDSPContext::idct_permutation_type

Definition at line 86 of file idctdsp.h.

Referenced by ff_dct_quantize_c(), ff_idctdsp_init(), ff_idctdsp_init_arm(), ff_idctdsp_init_armv5te(), ff_idctdsp_init_armv6(), ff_idctdsp_init_neon(), ff_idctdsp_init_ppc(), ff_idctdsp_init_x86(), and ff_wmv2_common_init().

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The documentation for this struct was generated from the following file:

• libavcodec/idctdsp.h