#include "avcodec.h"#include "internal.h"#include "aac_ac3_parser.h"#include "ac3.h"#include "ac3_parser.h"#include "ac3dec.h"#include "ac3dec_data.h"#include "eac3_data.h"Go to the source code of this file.
Defines | |
| #define | EAC3_SR_CODE_REDUCED 3 |
| #define | COEFF_0 10273905LL |
| lrint(M_SQRT2*cos(2*M_PI/12)*(1<<23)) | |
| #define | COEFF_1 11863283LL |
| lrint(M_SQRT2*cos(0*M_PI/12)*(1<<23)) = lrint(M_SQRT2*(1<<23)) | |
| #define | COEFF_2 3070444LL |
| lrint(M_SQRT2*cos(5*M_PI/12)*(1<<23)) | |
Enumerations | |
| enum | EAC3GaqMode { EAC3_GAQ_NO = 0, EAC3_GAQ_12, EAC3_GAQ_14, EAC3_GAQ_124 } |
| gain adaptive quantization mode More... | |
Functions | |
| void | ff_eac3_apply_spectral_extension (AC3DecodeContext *s) |
| Apply spectral extension to each channel by copying lower frequency coefficients to higher frequency bins and applying side information to approximate the original high frequency signal. | |
| static void | idct6 (int pre_mant[6]) |
| Calculate 6-point IDCT of the pre-mantissas. | |
| void | ff_eac3_decode_transform_coeffs_aht_ch (AC3DecodeContext *s, int ch) |
| Decode mantissas in a single channel for the entire frame. | |
| int | ff_eac3_parse_header (AC3DecodeContext *s) |
| Parse the E-AC-3 frame header. | |
| #define COEFF_0 10273905LL |
| #define COEFF_1 11863283LL |
| #define COEFF_2 3070444LL |
| #define EAC3_SR_CODE_REDUCED 3 |
| enum EAC3GaqMode |
| void ff_eac3_apply_spectral_extension | ( | AC3DecodeContext * | s | ) |
Apply spectral extension to each channel by copying lower frequency coefficients to higher frequency bins and applying side information to approximate the original high frequency signal.
Definition at line 66 of file eac3dec.c.
Referenced by decode_audio_block().
| void ff_eac3_decode_transform_coeffs_aht_ch | ( | AC3DecodeContext * | s, | |
| int | ch | |||
| ) |
Decode mantissas in a single channel for the entire frame.
This is used when AHT mode is enabled.
Definition at line 198 of file eac3dec.c.
Referenced by decode_transform_coeffs_ch().
| int ff_eac3_parse_header | ( | AC3DecodeContext * | s | ) |
Parse the E-AC-3 frame header.
This parses both the bit stream info and audio frame header.
Definition at line 291 of file eac3dec.c.
Referenced by parse_frame_header().
| static void idct6 | ( | int | pre_mant[6] | ) | [static] |
Calculate 6-point IDCT of the pre-mantissas.
All calculations are 24-bit fixed-point.
Definition at line 168 of file eac3dec.c.
Referenced by ff_eac3_decode_transform_coeffs_aht_ch(), and ff_h264_idct8_add_altivec().
1.5.8