mace.c File Reference

MACE decoder. More...

#include "avcodec.h"
#include "internal.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().
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, void *data, 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 []
AVCodec	ff_mace3_decoder
AVCodec	ff_mace6_decoder

Detailed Description

MACE decoder.

Definition in file mace.c.

Macro Definition Documentation

#define QT_8S_2_16S

(

x

)

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

Definition at line 151 of file mace.c.

Referenced by chomp3(), and chomp6().

Function Documentation

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 165 of file mace.c.

Referenced by chomp3(), and chomp6().

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

static

Definition at line 175 of file mace.c.

Referenced by chomp3(), and chomp6().

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

static

Definition at line 190 of file mace.c.

Referenced by mace_decode_frame().

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().

static av_cold int mace_decode_init ( AVCodecContext *  avctx )

static

Definition at line 227 of file mace.c.

static int mace_decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame_ptr, AVPacket *  avpkt  )

static

Definition at line 236 of file mace.c.

Variable Documentation

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

static

Definition at line 37 of file mace.c.

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

static

Definition at line 39 of file mace.c.

const int16_t MACEtab2[][4]

static

Definition at line 41 of file mace.c.

const int16_t MACEtab4[][2]

static

Definition at line 108 of file mace.c.

const int16_t* tab1

Definition at line 144 of file mace.c.

Referenced by compute_stereo(), dequant(), and main().

const int16_t* tab2

Definition at line 144 of file mace.c.

Referenced by main().

int stride

Definition at line 144 of file mace.c.

struct { ... } tabs[]

Initial value:

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

Referenced by read_table(), and very_broken_op().

AVCodec ff_mace3_decoder

Initial value:

= {
    .name           = "mace3",
    .long_name      = NULL_IF_CONFIG_SMALL("MACE (Macintosh Audio Compression/Expansion) 3:1"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_MACE3,
    .priv_data_size = sizeof(MACEContext),
    .init           = mace_decode_init,
    .decode         = mace_decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
                                                      AV_SAMPLE_FMT_NONE },
}

Definition at line 287 of file mace.c.

AVCodec ff_mace6_decoder

Initial value:

= {
    .name           = "mace6",
    .long_name      = NULL_IF_CONFIG_SMALL("MACE (Macintosh Audio Compression/Expansion) 6:1"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_MACE6,
    .priv_data_size = sizeof(MACEContext),
    .init           = mace_decode_init,
    .decode         = mace_decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
                                                      AV_SAMPLE_FMT_NONE },
}

Definition at line 300 of file mace.c.