mace.c File Reference

#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "libavutil/common.h"

Go to the source code of this file.

Data Structures
struct	ChannelData
struct	MACEContext

Macros
#define	QT_8S_2_16S(x)   (((x) & 0xFF00) | (((x) >> 8) & 0xFF))

Functions
static int16_t	mace_broken_clip_int16 (int n)
	MACE version of av_clip_int16(). More...
static int16_t	read_table (ChannelData *chd, uint8_t val, int tab_idx)
static void	chomp3 (ChannelData *chd, int16_t *output, uint8_t val, int tab_idx)
static void	chomp6 (ChannelData *chd, int16_t *output, uint8_t val, int tab_idx)
static av_cold int	mace_decode_init (AVCodecContext *avctx)
static int	mace_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)

Variables
static const int16_t	MACEtab1 [] = {-13, 8, 76, 222, 222, 76, 8, -13}
static const int16_t	MACEtab3 [] = {-18, 140, 140, -18}
static const int16_t	MACEtab2 [][4]
static const int16_t	MACEtab4 [][2]
struct {
const int16_t *   tab1
const int16_t *   tab2
int   stride
}	tabs []
const FFCodec	ff_mace3_decoder
const FFCodec	ff_mace6_decoder

Detailed Description

MACE decoder.

Definition in file mace.c.

Macro Definition Documentation

QT_8S_2_16S

#define QT_8S_2_16S

(

x

)

(((x) & 0xFF00) | (((x) >> 8) & 0xFF))

Definition at line 152 of file mace.c.

Function Documentation

mace_broken_clip_int16()

static int16_t mace_broken_clip_int16 ( int  n )

inlinestatic

MACE version of av_clip_int16().

We have to do this to keep binary identical output to the binary decoder.

Definition at line 166 of file mace.c.

Referenced by chomp3(), and chomp6().

read_table()

static int16_t read_table ( ChannelData *  chd, uint8_t  val, int  tab_idx  )

static

Definition at line 176 of file mace.c.

Referenced by chomp3(), and chomp6().

chomp3()

static void chomp3 ( ChannelData *  chd, int16_t *  output, uint8_t  val, int  tab_idx  )

static

Definition at line 191 of file mace.c.

Referenced by mace_decode_frame().

chomp6()

static void chomp6 ( ChannelData *  chd, int16_t *  output, uint8_t  val, int  tab_idx  )

static

Definition at line 201 of file mace.c.

Referenced by mace_decode_frame().

mace_decode_init()

static av_cold int mace_decode_init ( AVCodecContext *  avctx )

static

Definition at line 227 of file mace.c.

mace_decode_frame()

static int mace_decode_frame ( AVCodecContext *  avctx, AVFrame *  frame, int *  got_frame_ptr, AVPacket *  avpkt  )

static

Definition at line 236 of file mace.c.

Variable Documentation

MACEtab1

const int16_t MACEtab1[] = {-13, 8, 76, 222, 222, 76, 8, -13}

static

Definition at line 38 of file mace.c.

MACEtab3

const int16_t MACEtab3[] = {-18, 140, 140, -18}

static

Definition at line 40 of file mace.c.

MACEtab2

const int16_t MACEtab2[][4]

static

Definition at line 42 of file mace.c.

MACEtab4

const int16_t MACEtab4[][2]

static

Definition at line 109 of file mace.c.

tab1

const int16_t* tab1

Definition at line 145 of file mace.c.

Referenced by compute_stereo(), dequant(), dxv_decompress_cgo(), dxv_decompress_cocg(), and ff_acelp_fc_pulse_per_track().

tab2

const int16_t* tab2

Definition at line 145 of file mace.c.

Referenced by dxv_decompress_cocg(), and ff_acelp_fc_pulse_per_track().

stride

int stride

Definition at line 145 of file mace.c.

Referenced by read_table().

tabs

const { ... } tabs[]

Initial value:

= {
    {MACEtab1, &MACEtab2[0][0], 4},
    {MACEtab3, &MACEtab4[0][0], 2},
    {MACEtab1, &MACEtab2[0][0], 4}
}

Referenced by pretwiddle(), read_table(), twiddle(), and very_broken_op().

ff_mace3_decoder

const FFCodec ff_mace3_decoder

Initial value:

= {
    .p.name         = "mace3",
    CODEC_LONG_NAME("MACE (Macintosh Audio Compression/Expansion) 3:1"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_MACE3,
    .priv_data_size = sizeof(MACEContext),
    .init           = mace_decode_init,
    FF_CODEC_DECODE_CB(mace_decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
    .p.sample_fmts  = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
                                                      AV_SAMPLE_FMT_NONE },
}

Definition at line 287 of file mace.c.

ff_mace6_decoder

const FFCodec ff_mace6_decoder

Initial value:

= {
    .p.name         = "mace6",
    CODEC_LONG_NAME("MACE (Macintosh Audio Compression/Expansion) 6:1"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_MACE6,
    .priv_data_size = sizeof(MACEContext),
    .init           = mace_decode_init,
    FF_CODEC_DECODE_CB(mace_decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
    .p.sample_fmts  = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
                                                      AV_SAMPLE_FMT_NONE },
}

Definition at line 300 of file mace.c.