hvirtual/quicktime/ffmpeg/libavcodec/sonic.c File Reference

#include "avcodec.h"
#include "bitstream.h"
#include "golomb.h"

Include dependency graph for sonic.c:

Go to the source code of this file.

Data Structures

struct  SonicContext

Defines

#define MAX_CHANNELS   2
#define MID_SIDE   0
#define LEFT_SIDE   1
#define RIGHT_SIDE   2
#define LATTICE_SHIFT   10
#define SAMPLE_SHIFT   4
#define LATTICE_FACTOR   (1 << LATTICE_SHIFT)
#define SAMPLE_FACTOR   (1 << SAMPLE_SHIFT)
#define BASE_QUANT   0.6
#define RATE_VARIATION   3.0

Functions

static int divide (int a, int b)
static int shift (int a, int b)
static int shift_down (int a, int b)
static int intlist_write (PutBitContext *pb, int *buf, int entries, int base_2_part)
static int intlist_read (GetBitContext *gb, int *buf, int entries, int base_2_part)
static void predictor_init_state (int *k, int *state, int order)
static int predictor_calc_error (int *k, int *state, int order, int error)
static void modified_levinson_durbin (int *window, int window_entries, int *out, int out_entries, int channels, int *tap_quant)
static int sonic_decode_init (AVCodecContext *avctx)
static int sonic_decode_close (AVCodecContext *avctx)
static int sonic_decode_frame (AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)

Variables

static int samplerate_table []

Detailed Description

Simple free lossless/lossy audio codec Based on Paul Francis Harrison's Bonk (http://www.logarithmic.net/pfh/bonk) Written and designed by Alex Beregszaszi

TODO:

Definition in file sonic.c.

Define Documentation

#define BASE_QUANT   0.6

Definition at line 72 of file sonic.c.

#define LATTICE_FACTOR   (1 << LATTICE_SHIFT)

Definition at line 69 of file sonic.c.

Referenced by modified_levinson_durbin().

#define LATTICE_SHIFT   10

Definition at line 67 of file sonic.c.

Referenced by modified_levinson_durbin(), predictor_calc_error(), and predictor_init_state().

#define LEFT_SIDE   1

Definition at line 41 of file sonic.c.

Referenced by decode_frame(), decode_subframe(), flac_decode_frame(), and sonic_decode_frame().

#define MAX_CHANNELS   2

Definition at line 38 of file sonic.c.

#define MID_SIDE   0

Definition at line 40 of file sonic.c.

Referenced by decode_subframe(), flac_decode_frame(), and sonic_decode_frame().

#define RATE_VARIATION   3.0

Definition at line 73 of file sonic.c.

#define RIGHT_SIDE   2

Definition at line 42 of file sonic.c.

Referenced by decode_subframe(), flac_decode_frame(), and sonic_decode_frame().

#define SAMPLE_FACTOR   (1 << SAMPLE_SHIFT)

Definition at line 70 of file sonic.c.

Referenced by predictor_calc_error(), and sonic_decode_frame().

#define SAMPLE_SHIFT   4

Definition at line 68 of file sonic.c.

Referenced by sonic_decode_frame().

Function Documentation

static int divide ( int  a,
int  b 
) [inline, static]

Definition at line 75 of file sonic.c.

static int intlist_read ( GetBitContext *  gb,
int *  buf,
int  entries,
int  base_2_part 
) [inline, static]

Definition at line 104 of file sonic.c.

References get_se_golomb().

Referenced by sonic_decode_frame().

Here is the call graph for this function:

static int intlist_write ( PutBitContext *  pb,
int *  buf,
int  entries,
int  base_2_part 
) [inline, static]

Definition at line 94 of file sonic.c.

References set_se_golomb().

Here is the call graph for this function:

static void modified_levinson_durbin ( int *  window,
int  window_entries,
int *  out,
int  out_entries,
int  channels,
int *  tap_quant 
) [static]

Definition at line 413 of file sonic.c.

References av_free(), av_mallocz(), LATTICE_FACTOR, LATTICE_SHIFT, memcpy, and shift_down().

Here is the call graph for this function:

static int predictor_calc_error ( int *  k,
int *  state,
int  order,
int  error 
) [static]

Definition at line 379 of file sonic.c.

References LATTICE_SHIFT, SAMPLE_FACTOR, and shift_down().

Referenced by sonic_decode_frame().

Here is the call graph for this function:

static void predictor_init_state ( int *  k,
int *  state,
int  order 
) [static]

Definition at line 362 of file sonic.c.

References LATTICE_SHIFT, and shift_down().

Referenced by sonic_decode_frame().

Here is the call graph for this function:

static int shift ( int  a,
int  b 
) [inline, static]

Definition at line 83 of file sonic.c.

Referenced by alloc_tables(), check_input_motion(), decode_init(), dequantize_sample(), direct_search(), do_video_out(), dpcm_decode_frame(), encode_frame(), encode_q_branch(), epzs_motion_search2(), epzs_motion_search4(), epzs_motion_search_internal(), exponents_from_scale_factors(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_pre_estimate_p_frame_motion(), fill_pad_region(), get_amv(), h263_decode_motion(), img_resample(), kodak_dc120_load_raw(), l1_unscale(), l2_unscale_group(), lin_interpolate(), mpeg_decode_motion(), msmpeg4v2_decode_motion(), sab_diamond_search(), scale_colors(), sonic_decode_frame(), and xa_decode().

static int shift_down ( int  a,
int  b 
) [inline, static]

Definition at line 88 of file sonic.c.

Referenced by modified_levinson_durbin(), EditPanel::next_label(), predictor_calc_error(), predictor_init_state(), and EditPanel::prev_label().

static int sonic_decode_close ( AVCodecContext *  avctx  )  [static]

Definition at line 829 of file sonic.c.

References av_free(), SonicContext::channels, SonicContext::coded_samples, SonicContext::int_samples, SonicContext::predictor_k, SonicContext::predictor_state, AVCodecContext::priv_data, and SonicContext::tap_quant.

Here is the call graph for this function:

static int sonic_decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  data_size,
uint8_t *  buf,
int  buf_size 
) [static]

Definition at line 847 of file sonic.c.

References align_get_bits(), SonicContext::block_align, SonicContext::channels, SonicContext::coded_samples, SonicContext::decorrelation, SonicContext::downsampling, SonicContext::frame_size, get_bits_count(), get_ue_golomb(), init_get_bits(), SonicContext::int_samples, intlist_read(), LEFT_SIDE, SonicContext::lossless, MID_SIDE, SonicContext::num_taps, predictor_calc_error(), predictor_init_state(), SonicContext::predictor_k, SonicContext::predictor_state, AVCodecContext::priv_data, RIGHT_SIDE, SAMPLE_FACTOR, SAMPLE_SHIFT, shift(), and SonicContext::tap_quant.

Here is the call graph for this function:

static int sonic_decode_init ( AVCodecContext *  avctx  )  [static]

Definition at line 749 of file sonic.c.

References av_log(), AV_LOG_ERROR, AV_LOG_INFO, av_mallocz(), SonicContext::block_align, AVCodecContext::channels, SonicContext::channels, SonicContext::coded_samples, SonicContext::decorrelation, SonicContext::downsampling, AVCodecContext::extradata, AVCodecContext::extradata_size, SonicContext::frame_size, get_bits(), get_bits1(), init_get_bits(), SonicContext::int_samples, SonicContext::lossless, MAX_CHANNELS, SonicContext::num_taps, SonicContext::predictor_k, SonicContext::predictor_state, AVCodecContext::priv_data, AVCodecContext::sample_rate, SonicContext::samplerate, skip_bits(), and SonicContext::tap_quant.

Here is the call graph for this function:

Variable Documentation

int samplerate_table[] [static]

Initial value:

    { 44100, 22050, 11025, 96000, 48000, 32000, 24000, 16000, 8000 }

Definition at line 480 of file sonic.c.

Referenced by quicktime_esds_samplerate().

Generated on Mon Apr 28 14:06:16 2008 for Cinelerra by  doxygen 1.5.5