osq.c File Reference

#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "internal.h"
#include "get_bits.h"
#include "unary.h"

Go to the source code of this file.

Data Structures
struct	OSQChannel
struct	OSQContext

Macros
#define	BITSTREAM_READER_LE
#define	OFFSET   5
#define	A   (-1)
#define	B   (-2)
#define	C   (-3)
#define	D   (-4)
#define	E   (-5)
#define	P2   (((unsigned)dst[A] + dst[A]) - dst[B])
#define	P3   (((unsigned)dst[A] - dst[B]) * 3 + dst[C])

Functions
static void	osq_flush (AVCodecContext *avctx)
static av_cold int	osq_close (AVCodecContext *avctx)
static av_cold int	osq_init (AVCodecContext *avctx)
static void	reset_stats (OSQChannel *cb)
static void	update_stats (OSQChannel *cb, int val)
static int	update_residue_parameter (OSQChannel *cb)
static uint32_t	get_urice (GetBitContext *gb, int k)
static int32_t	get_srice (GetBitContext *gb, int x)
static int	osq_channel_parameters (AVCodecContext *avctx, int ch)
static int	do_decode (AVCodecContext *avctx, AVFrame *frame, int decorrelate, int downsample)
static int	osq_decode_block (AVCodecContext *avctx, AVFrame *frame)
static int	osq_receive_frame (AVCodecContext *avctx, AVFrame *frame)

Variables
const FFCodec	ff_osq_decoder

Macro Definition Documentation

BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 29 of file osq.c.

OFFSET

#define OFFSET   5

Definition at line 33 of file osq.c.

A

#define A   (-1)

Definition at line 226 of file osq.c.

B

#define B   (-2)

Definition at line 227 of file osq.c.

C

#define C   (-3)

Definition at line 228 of file osq.c.

D

#define D   (-4)

Definition at line 229 of file osq.c.

E

#define E   (-5)

Definition at line 230 of file osq.c.

P2

#define P2   (((unsigned)dst[A] + dst[A]) - dst[B])

Definition at line 231 of file osq.c.

P3

#define P3   (((unsigned)dst[A] - dst[B]) * 3 + dst[C])

Definition at line 232 of file osq.c.

Function Documentation

osq_flush()

static void osq_flush ( AVCodecContext *  avctx )

static

Definition at line 65 of file osq.c.

osq_close()

static av_cold int osq_close ( AVCodecContext *  avctx )

static

Definition at line 73 of file osq.c.

osq_init()

static av_cold int osq_init ( AVCodecContext *  avctx )

static

Definition at line 86 of file osq.c.

reset_stats()

static void reset_stats ( OSQChannel *  cb )

static

Definition at line 141 of file osq.c.

Referenced by osq_channel_parameters().

update_stats()

static void update_stats ( OSQChannel *  cb, int  val  )

static

Definition at line 147 of file osq.c.

Referenced by do_decode().

update_residue_parameter()

static int update_residue_parameter ( OSQChannel *  cb )

static

Definition at line 157 of file osq.c.

Referenced by do_decode().

get_urice()

static uint32_t get_urice ( GetBitContext *  gb, int  k  )

static

Definition at line 180 of file osq.c.

Referenced by get_srice(), and osq_channel_parameters().

get_srice()

static int32_t get_srice ( GetBitContext *  gb, int  x  )

static

Definition at line 191 of file osq.c.

Referenced by do_decode().

osq_channel_parameters()

static int osq_channel_parameters ( AVCodecContext *  avctx, int  ch  )

static

Definition at line 197 of file osq.c.

Referenced by osq_decode_block().

do_decode()

static int do_decode ( AVCodecContext *  avctx, AVFrame *  frame, int  decorrelate, int  downsample  )

static

Definition at line 234 of file osq.c.

Referenced by osq_decode_block().

osq_decode_block()

static int osq_decode_block ( AVCodecContext *  avctx, AVFrame *  frame  )

static

Definition at line 356 of file osq.c.

Referenced by osq_receive_frame().

osq_receive_frame()

static int osq_receive_frame ( AVCodecContext *  avctx, AVFrame *  frame  )

static

Definition at line 416 of file osq.c.

Variable Documentation

ff_osq_decoder

const FFCodec ff_osq_decoder

Initial value:

= {
    .p.name           = "osq",
    CODEC_LONG_NAME("OSQ (Original Sound Quality)"),
    .p.type           = AVMEDIA_TYPE_AUDIO,
    .p.id             = AV_CODEC_ID_OSQ,
    .priv_data_size   = sizeof(OSQContext),
    .init             = osq_init,
    FF_CODEC_RECEIVE_FRAME_CB(osq_receive_frame),
    .close            = osq_close,
    .p.capabilities   = AV_CODEC_CAP_CHANNEL_CONF |
                        AV_CODEC_CAP_DR1,
    .caps_internal    = FF_CODEC_CAP_INIT_CLEANUP,
    .p.sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
                                                        AV_SAMPLE_FMT_S16P,
                                                        AV_SAMPLE_FMT_S32P,
                                                        AV_SAMPLE_FMT_NONE },
    .flush            = osq_flush,
}

Definition at line 480 of file osq.c.