FFmpeg
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#include <stdint.h>
#include "libavutil/audio_fifo.h"
#include "libavutil/float_dsp.h"
#include "libavutil/frame.h"
#include "libswresample/swresample.h"
#include "avcodec.h"
#include "get_bits.h"
Go to the source code of this file.
Data Structures | |
struct | RawBitsContext |
struct | OpusRangeCoder |
struct | OpusPacket |
struct | OpusStreamContext |
struct | ChannelMap |
struct | OpusContext |
Macros | |
#define | MAX_FRAME_SIZE 1275 |
#define | MAX_FRAMES 48 |
#define | MAX_PACKET_DUR 5760 |
#define | CELT_SHORT_BLOCKSIZE 120 |
#define | CELT_OVERLAP CELT_SHORT_BLOCKSIZE |
#define | CELT_MAX_LOG_BLOCKS 3 |
#define | CELT_MAX_FRAME_SIZE (CELT_SHORT_BLOCKSIZE * (1 << CELT_MAX_LOG_BLOCKS)) |
#define | CELT_MAX_BANDS 21 |
#define | CELT_VECTORS 11 |
#define | CELT_ALLOC_STEPS 6 |
#define | CELT_FINE_OFFSET 21 |
#define | CELT_MAX_FINE_BITS 8 |
#define | CELT_NORM_SCALE 16384 |
#define | CELT_QTHETA_OFFSET 4 |
#define | CELT_QTHETA_OFFSET_TWOPHASE 16 |
#define | CELT_DEEMPH_COEFF 0.85000610f |
#define | CELT_POSTFILTER_MINPERIOD 15 |
#define | CELT_ENERGY_SILENCE (-28.0f) |
#define | SILK_HISTORY 322 |
#define | SILK_MAX_LPC 16 |
#define | ROUND_MULL(a, b, s) (((MUL64(a, b) >> ((s) - 1)) + 1) >> 1) |
#define | ROUND_MUL16(a, b) ((MUL16(a, b) + 16384) >> 15) |
#define | opus_ilog(i) (av_log2(i) + !!(i)) |
#define | OPUS_TS_HEADER 0x7FE0 |
#define | OPUS_TS_MASK 0xFFE0 |
Functions | |
static av_always_inline void | opus_rc_normalize (OpusRangeCoder *rc) |
static av_always_inline void | opus_rc_update (OpusRangeCoder *rc, unsigned int scale, unsigned int low, unsigned int high, unsigned int total) |
static av_always_inline unsigned int | opus_rc_getsymbol (OpusRangeCoder *rc, const uint16_t *cdf) |
static av_always_inline unsigned int | opus_rc_p2model (OpusRangeCoder *rc, unsigned int bits) |
static av_always_inline unsigned int | opus_rc_tell (const OpusRangeCoder *rc) |
CELT: estimate bits of entropy that have thus far been consumed for the current CELT frame, to integer and fractional (1/8th bit) precision. More... | |
static av_always_inline unsigned int | opus_rc_tell_frac (const OpusRangeCoder *rc) |
static av_always_inline unsigned int | opus_getrawbits (OpusRangeCoder *rc, unsigned int count) |
CELT: read 1-25 raw bits at the end of the frame, backwards byte-wise. More... | |
static av_always_inline unsigned int | opus_rc_unimodel (OpusRangeCoder *rc, unsigned int size) |
CELT: read a uniform distribution. More... | |
static av_always_inline int | opus_rc_laplace (OpusRangeCoder *rc, unsigned int symbol, int decay) |
static av_always_inline unsigned int | opus_rc_stepmodel (OpusRangeCoder *rc, int k0) |
static av_always_inline unsigned int | opus_rc_trimodel (OpusRangeCoder *rc, int qn) |
int | ff_opus_parse_packet (OpusPacket *pkt, const uint8_t *buf, int buf_size, int self_delimited) |
Parse Opus packet info from raw packet data. More... | |
int | ff_opus_parse_extradata (AVCodecContext *avctx, OpusContext *s) |
int | ff_silk_init (AVCodecContext *avctx, SilkContext **ps, int output_channels) |
void | ff_silk_free (SilkContext **ps) |
void | ff_silk_flush (SilkContext *s) |
int | ff_silk_decode_superframe (SilkContext *s, OpusRangeCoder *rc, float *output[2], enum OpusBandwidth bandwidth, int coded_channels, int duration_ms) |
Decode the LP layer of one Opus frame (which may correspond to several SILK frames). More... | |
int | ff_celt_init (AVCodecContext *avctx, CeltContext **s, int output_channels) |
void | ff_celt_free (CeltContext **s) |
void | ff_celt_flush (CeltContext *s) |
int | ff_celt_decode_frame (CeltContext *s, OpusRangeCoder *rc, float **output, int coded_channels, int frame_size, int startband, int endband) |
Variables | |
static const uint8_t | opus_default_extradata [30] |
const float | ff_celt_window2 [120] |
#define MAX_PACKET_DUR 5760 |
Definition at line 39 of file opus.h.
Referenced by ff_opus_parse_packet().
#define CELT_SHORT_BLOCKSIZE 120 |
Definition at line 41 of file opus.h.
Referenced by ff_celt_decode_frame().
#define CELT_OVERLAP CELT_SHORT_BLOCKSIZE |
Definition at line 42 of file opus.h.
Referenced by celt_postfilter(), celt_postfilter_apply_transition(), and ff_celt_decode_frame().
#define CELT_MAX_LOG_BLOCKS 3 |
Definition at line 43 of file opus.h.
Referenced by ff_celt_decode_frame().
#define CELT_MAX_FRAME_SIZE (CELT_SHORT_BLOCKSIZE * (1 << CELT_MAX_LOG_BLOCKS)) |
Definition at line 44 of file opus.h.
Referenced by ff_imdct15_init().
#define CELT_MAX_BANDS 21 |
Definition at line 45 of file opus.h.
Referenced by celt_decode_allocation(), celt_decode_band(), celt_decode_coarse_energy(), ff_celt_decode_frame(), and ff_celt_flush().
#define CELT_VECTORS 11 |
Definition at line 46 of file opus.h.
Referenced by celt_decode_allocation().
#define CELT_ALLOC_STEPS 6 |
Definition at line 47 of file opus.h.
Referenced by celt_decode_allocation().
#define CELT_FINE_OFFSET 21 |
Definition at line 48 of file opus.h.
Referenced by celt_decode_allocation().
#define CELT_MAX_FINE_BITS 8 |
Definition at line 49 of file opus.h.
Referenced by celt_decode_allocation(), and celt_decode_final_energy().
#define CELT_QTHETA_OFFSET 4 |
Definition at line 51 of file opus.h.
Referenced by celt_decode_band().
#define CELT_QTHETA_OFFSET_TWOPHASE 16 |
Definition at line 52 of file opus.h.
Referenced by celt_decode_band().
#define CELT_DEEMPH_COEFF 0.85000610f |
Definition at line 53 of file opus.h.
Referenced by ff_celt_decode_frame().
#define CELT_POSTFILTER_MINPERIOD 15 |
Definition at line 54 of file opus.h.
Referenced by parse_postfilter().
#define CELT_ENERGY_SILENCE (-28.0f) |
Definition at line 55 of file opus.h.
Referenced by ff_celt_decode_frame(), and ff_celt_flush().
#define SILK_HISTORY 322 |
Definition at line 57 of file opus.h.
Referenced by ff_silk_decode_superframe(), silk_decode_frame(), and silk_unmix_ms().
Definition at line 60 of file opus.h.
Referenced by silk_is_lpc_stable(), silk_lsf2lpc(), and silk_lsp2poly().
Definition at line 61 of file opus.h.
Referenced by celt_cos(), celt_decode_band(), and celt_log2tan().
#define opus_ilog | ( | i | ) | (av_log2(i) + !!(i)) |
Definition at line 62 of file opus.h.
Referenced by celt_log2tan(), opus_rc_unimodel(), silk_decode_lpc(), and silk_is_lpc_stable().
#define OPUS_TS_HEADER 0x7FE0 |
Definition at line 64 of file opus.h.
Referenced by opus_find_frame_end().
#define OPUS_TS_MASK 0xFFE0 |
Definition at line 65 of file opus.h.
Referenced by opus_find_frame_end().
enum OpusMode |
enum OpusBandwidth |
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Definition at line 186 of file opus.h.
Referenced by opus_rc_init(), opus_rc_p2model(), and opus_rc_update().
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Definition at line 195 of file opus.h.
Referenced by opus_rc_getsymbol(), opus_rc_laplace(), opus_rc_stepmodel(), opus_rc_trimodel(), and opus_rc_unimodel().
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Definition at line 205 of file opus.h.
Referenced by celt_decode_allocation(), celt_decode_coarse_energy(), parse_postfilter(), silk_count_children(), silk_decode_excitation(), silk_decode_frame(), and silk_decode_lpc().
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Definition at line 224 of file opus.h.
Referenced by celt_decode_allocation(), celt_decode_band(), celt_decode_coarse_energy(), celt_decode_tf_changes(), ff_celt_decode_frame(), ff_silk_decode_superframe(), opus_decode_frame(), and parse_postfilter().
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CELT: estimate bits of entropy that have thus far been consumed for the current CELT frame, to integer and fractional (1/8th bit) precision.
Definition at line 245 of file opus.h.
Referenced by celt_decode_allocation(), celt_decode_coarse_energy(), celt_decode_tf_changes(), ff_celt_decode_frame(), opus_decode_frame(), and parse_postfilter().
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Definition at line 250 of file opus.h.
Referenced by celt_decode_allocation(), celt_decode_band(), and celt_decode_bands().
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CELT: read 1-25 raw bits at the end of the frame, backwards byte-wise.
Definition at line 272 of file opus.h.
Referenced by celt_decode_band(), celt_decode_final_energy(), celt_decode_fine_energy(), ff_celt_decode_frame(), opus_rc_unimodel(), and parse_postfilter().
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CELT: read a uniform distribution.
Definition at line 293 of file opus.h.
Referenced by celt_decode_allocation(), celt_decode_band(), celt_decode_pulses(), opus_decode_frame(), and parse_postfilter().
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Definition at line 312 of file opus.h.
Referenced by celt_decode_coarse_energy().
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Definition at line 351 of file opus.h.
Referenced by celt_decode_band().
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Definition at line 366 of file opus.h.
Referenced by celt_decode_band().
int ff_opus_parse_packet | ( | OpusPacket * | pkt, |
const uint8_t * | buf, | ||
int | buf_size, | ||
int | self_delimited | ||
) |
Parse Opus packet info from raw packet data.
Definition at line 88 of file opus.c.
Referenced by opus_decode_packet(), and opus_find_frame_end().
int ff_opus_parse_extradata | ( | AVCodecContext * | avctx, |
OpusContext * | s | ||
) |
Definition at line 289 of file opus.c.
Referenced by opus_decode_init(), and opus_find_frame_end().
int ff_silk_init | ( | AVCodecContext * | avctx, |
SilkContext ** | ps, | ||
int | output_channels | ||
) |
Definition at line 1575 of file opus_silk.c.
Referenced by opus_decode_init().
void ff_silk_free | ( | SilkContext ** | ps | ) |
Definition at line 1562 of file opus_silk.c.
Referenced by opus_decode_close().
void ff_silk_flush | ( | SilkContext * | s | ) |
Definition at line 1567 of file opus_silk.c.
Referenced by ff_silk_init(), opus_decode_flush(), and opus_decode_frame().
int ff_silk_decode_superframe | ( | SilkContext * | s, |
OpusRangeCoder * | rc, | ||
float * | output[2], | ||
enum OpusBandwidth | bandwidth, | ||
int | coded_channels, | ||
int | duration_ms | ||
) |
Decode the LP layer of one Opus frame (which may correspond to several SILK frames).
Definition at line 1498 of file opus_silk.c.
Referenced by opus_decode_frame().
int ff_celt_init | ( | AVCodecContext * | avctx, |
CeltContext ** | s, | ||
int | output_channels | ||
) |
Definition at line 2188 of file opus_celt.c.
Referenced by opus_decode_init().
void ff_celt_free | ( | CeltContext ** | s | ) |
Definition at line 2173 of file opus_celt.c.
Referenced by ff_celt_init(), and opus_decode_close().
void ff_celt_flush | ( | CeltContext * | s | ) |
Definition at line 2146 of file opus_celt.c.
Referenced by ff_celt_init(), opus_decode_flush(), and opus_decode_frame().
int ff_celt_decode_frame | ( | CeltContext * | s, |
OpusRangeCoder * | rc, | ||
float ** | output, | ||
int | coded_channels, | ||
int | frame_size, | ||
int | startband, | ||
int | endband | ||
) |
Definition at line 1976 of file opus_celt.c.
Referenced by opus_decode_frame(), and opus_decode_redundancy().
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Definition at line 67 of file opus.h.
Referenced by ff_opus_parse_extradata(), and ff_parse_mpeg2_descriptor().
const float ff_celt_window2[120] |
Definition at line 466 of file opus_celt.c.
Referenced by celt_postfilter_apply_transition(), opus_decode_frame(), and opus_flush_resample().