#include <stdint.h>
#include "libavutil/float_dsp.h"
#include "ac3.h"
#include "ac3dsp.h"
#include "avcodec.h"
#include "dsputil.h"
#include "put_bits.h"
#include "fft.h"
Go to the source code of this file.
Data Structures | |
struct | AC3EncOptions |
Encoding Options used by AVOption. More... | |
struct | AC3Block |
Data for a single audio block. More... | |
struct | AC3EncodeContext |
AC-3 encoder private context. More... | |
Defines | |
#define | CONFIG_AC3ENC_FLOAT 0 |
#define | OFFSET(param) offsetof(AC3EncodeContext, options.param) |
#define | AC3ENC_PARAM (AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM) |
#define | AC3ENC_TYPE_AC3_FIXED 0 |
#define | AC3ENC_TYPE_AC3 1 |
#define | AC3ENC_TYPE_EAC3 2 |
#define | AC3_NAME(x) ff_ac3_fixed_ ## x |
#define | MAC_COEF(d, a, b) MAC64(d,a,b) |
#define | COEF_MIN -16777215 |
#define | COEF_MAX 16777215 |
#define | NEW_CPL_COORD_THRESHOLD 503317 |
#define | AC3ENC_OPT_NONE -1 |
#define | AC3ENC_OPT_AUTO -1 |
#define | AC3ENC_OPT_OFF 0 |
#define | AC3ENC_OPT_ON 1 |
#define | AC3ENC_OPT_NOT_INDICATED 0 |
#define | AC3ENC_OPT_MODE_ON 2 |
#define | AC3ENC_OPT_MODE_OFF 1 |
#define | AC3ENC_OPT_LARGE_ROOM 1 |
#define | AC3ENC_OPT_SMALL_ROOM 2 |
#define | AC3ENC_OPT_DOWNMIX_LTRT 1 |
#define | AC3ENC_OPT_DOWNMIX_LORO 2 |
#define | AC3ENC_OPT_ADCONV_STANDARD 0 |
#define | AC3ENC_OPT_ADCONV_HDCD 1 |
Typedefs | |
typedef int16_t | SampleType |
typedef int32_t | CoefType |
typedef int64_t | CoefSumType |
Functions | |
int | ff_ac3_encode_init (AVCodecContext *avctx) |
int | ff_ac3_encode_close (AVCodecContext *avctx) |
Finalize encoding and free any memory allocated by the encoder. | |
int | ff_ac3_validate_metadata (AC3EncodeContext *s) |
Validate metadata options as set by AVOption system. | |
void | ff_ac3_adjust_frame_size (AC3EncodeContext *s) |
Adjust the frame size to make the average bit rate match the target bit rate. | |
void | ff_ac3_compute_coupling_strategy (AC3EncodeContext *s) |
Set the initial coupling strategy parameters prior to coupling analysis. | |
void | ff_ac3_apply_rematrixing (AC3EncodeContext *s) |
Apply stereo rematrixing to coefficients based on rematrixing flags. | |
void | ff_ac3_process_exponents (AC3EncodeContext *s) |
Calculate final exponents from the supplied MDCT coefficients and exponent shift. | |
int | ff_ac3_compute_bit_allocation (AC3EncodeContext *s) |
void | ff_ac3_group_exponents (AC3EncodeContext *s) |
Group exponents. | |
void | ff_ac3_quantize_mantissas (AC3EncodeContext *s) |
Quantize mantissas using coefficients, exponents, and bit allocation pointers. | |
void | ff_ac3_output_frame (AC3EncodeContext *s, unsigned char *frame) |
Write the frame to the output bitstream. | |
void | ff_ac3_fixed_mdct_end (AC3EncodeContext *s) |
void | ff_ac3_float_mdct_end (AC3EncodeContext *s) |
Finalize MDCT and free allocated memory. | |
int | ff_ac3_fixed_mdct_init (AC3EncodeContext *s) |
int | ff_ac3_float_mdct_init (AC3EncodeContext *s) |
Initialize MDCT tables. | |
int | ff_ac3_fixed_allocate_sample_buffers (AC3EncodeContext *s) |
int | ff_ac3_float_allocate_sample_buffers (AC3EncodeContext *s) |
int | ff_ac3_fixed_encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr) |
int | ff_ac3_float_encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr) |
Variables | |
const uint64_t | ff_ac3_channel_layouts [19] |
List of supported channel layouts. |
Definition in file ac3enc.h.
#define AC3ENC_OPT_ADCONV_HDCD 1 |
#define AC3ENC_OPT_ADCONV_STANDARD 0 |
Definition at line 86 of file ac3enc.h.
Referenced by dprint_options(), and ff_ac3_validate_metadata().
#define AC3ENC_OPT_AUTO -1 |
#define AC3ENC_OPT_DOWNMIX_LORO 2 |
#define AC3ENC_OPT_DOWNMIX_LTRT 1 |
#define AC3ENC_OPT_LARGE_ROOM 1 |
#define AC3ENC_OPT_MODE_OFF 1 |
#define AC3ENC_OPT_MODE_ON 2 |
#define AC3ENC_OPT_NONE -1 |
#define AC3ENC_OPT_NOT_INDICATED 0 |
Definition at line 77 of file ac3enc.h.
Referenced by dprint_options(), and ff_ac3_validate_metadata().
#define AC3ENC_OPT_OFF 0 |
#define AC3ENC_OPT_ON 1 |
#define AC3ENC_OPT_SMALL_ROOM 2 |
#define AC3ENC_PARAM (AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM) |
#define COEF_MAX 16777215 |
#define COEF_MIN -16777215 |
#define MAC_COEF | ( | d, | |||
a, | |||||
b | ) | MAC64(d,a,b) |
#define NEW_CPL_COORD_THRESHOLD 503317 |
#define OFFSET | ( | param | ) | offsetof(AC3EncodeContext, options.param) |
typedef int64_t CoefSumType |
typedef int16_t SampleType |
void ff_ac3_adjust_frame_size | ( | AC3EncodeContext * | s | ) |
Adjust the frame size to make the average bit rate match the target bit rate.
This is only needed for 11025, 22050, and 44100 sample rates or any E-AC-3.
s | AC-3 encoder private context |
Definition at line 182 of file ac3enc.c.
Referenced by encode_frame().
void ff_ac3_apply_rematrixing | ( | AC3EncodeContext * | s | ) |
Apply stereo rematrixing to coefficients based on rematrixing flags.
s | AC-3 encoder private context |
Definition at line 271 of file ac3enc.c.
Referenced by encode_frame().
int ff_ac3_compute_bit_allocation | ( | AC3EncodeContext * | s | ) |
void ff_ac3_compute_coupling_strategy | ( | AC3EncodeContext * | s | ) |
Set the initial coupling strategy parameters prior to coupling analysis.
s | AC-3 encoder private context |
Definition at line 200 of file ac3enc.c.
Referenced by encode_frame().
int ff_ac3_encode_close | ( | AVCodecContext * | avctx | ) |
Finalize encoding and free any memory allocated by the encoder.
avctx | Codec context |
Definition at line 2016 of file ac3enc.c.
Referenced by ff_ac3_encode_init().
int ff_ac3_encode_init | ( | AVCodecContext * | avctx | ) |
int ff_ac3_fixed_allocate_sample_buffers | ( | AC3EncodeContext * | s | ) |
Referenced by ff_ac3_encode_init().
int ff_ac3_fixed_encode_frame | ( | AVCodecContext * | avctx, | |
AVPacket * | avpkt, | |||
const AVFrame * | frame, | |||
int * | got_packet_ptr | |||
) |
void ff_ac3_fixed_mdct_end | ( | AC3EncodeContext * | s | ) |
Referenced by ff_ac3_encode_init().
int ff_ac3_fixed_mdct_init | ( | AC3EncodeContext * | s | ) |
Referenced by ff_ac3_encode_init().
int ff_ac3_float_allocate_sample_buffers | ( | AC3EncodeContext * | s | ) |
Referenced by ff_ac3_encode_init().
int ff_ac3_float_encode_frame | ( | AVCodecContext * | avctx, | |
AVPacket * | avpkt, | |||
const AVFrame * | frame, | |||
int * | got_packet_ptr | |||
) |
void ff_ac3_float_mdct_end | ( | AC3EncodeContext * | s | ) |
Finalize MDCT and free allocated memory.
s | AC-3 encoder private context |
Definition at line 55 of file ac3enc_float.c.
Referenced by ff_ac3_encode_init().
int ff_ac3_float_mdct_init | ( | AC3EncodeContext * | s | ) |
Initialize MDCT tables.
s | AC-3 encoder private context |
Definition at line 68 of file ac3enc_float.c.
Referenced by ff_ac3_encode_init().
void ff_ac3_group_exponents | ( | AC3EncodeContext * | s | ) |
Group exponents.
3 delta-encoded exponents are in each 7-bit group. The number of groups varies depending on exponent strategy and bandwidth.
s | AC-3 encoder private context |
Definition at line 578 of file ac3enc.c.
Referenced by encode_frame().
void ff_ac3_output_frame | ( | AC3EncodeContext * | s, | |
unsigned char * | frame | |||
) |
Write the frame to the output bitstream.
s | AC-3 encoder private context | |
frame | output data buffer |
Definition at line 1660 of file ac3enc.c.
Referenced by encode_frame().
void ff_ac3_process_exponents | ( | AC3EncodeContext * | s | ) |
Calculate final exponents from the supplied MDCT coefficients and exponent shift.
Extract exponents from MDCT coefficients, calculate exponent strategies, and encode final exponents.
s | AC-3 encoder private context |
Definition at line 636 of file ac3enc.c.
Referenced by encode_frame().
void ff_ac3_quantize_mantissas | ( | AC3EncodeContext * | s | ) |
Quantize mantissas using coefficients, exponents, and bit allocation pointers.
s | AC-3 encoder private context |
Definition at line 1299 of file ac3enc.c.
Referenced by encode_frame().
int ff_ac3_validate_metadata | ( | AC3EncodeContext * | s | ) |
Validate metadata options as set by AVOption system.
These values can optionally be changed per-frame.
s | AC-3 encoder private context |
Definition at line 1832 of file ac3enc.c.
Referenced by encode_frame(), and validate_options().
const uint64_t ff_ac3_channel_layouts[19] |