vima.c File Reference

LucasArts VIMA audio decoder. More...

#include "libavutil/channel_layout.h"
#include "adpcm_data.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"

Go to the source code of this file.

Functions
static av_cold int	decode_init (AVCodecContext *avctx)
static int	decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *pkt)

Variables
static int	predict_table_init = 0
static uint16_t	predict_table [5786 *2]
static const uint8_t	size_table []
static const int8_t	index_table1 []
static const int8_t	index_table2 []
static const int8_t	index_table3 []
static const int8_t	index_table4 []
static const int8_t	index_table5 []
static const int8_t	index_table6 []
static const int8_t *const	step_index_tables []
AVCodec	ff_adpcm_vima_decoder

Detailed Description

LucasArts VIMA audio decoder.

Author

Paul B Mahol

Definition in file vima.c.

Function Documentation

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 87 of file vima.c.

static int decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame_ptr, AVPacket *  pkt  )

static

Definition at line 118 of file vima.c.

Variable Documentation

int predict_table_init = 0

static

Definition at line 35 of file vima.c.

Referenced by decode_init().

uint16_t predict_table[5786 *2]

static

Definition at line 36 of file vima.c.

Referenced by decode_frame(), and decode_init().

const uint8_t size_table[]

static

Initial value:

= {
    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
    5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
}

Definition at line 38 of file vima.c.

Referenced by decode_frame().

const int8_t index_table1[]

static

Initial value:

= {
    -1, 4, -1, 4
}

Definition at line 47 of file vima.c.

const int8_t index_table2[]

static

Initial value:

= {
    -1, -1, 2, 6, -1, -1, 2, 6
}

Definition at line 51 of file vima.c.

const int8_t index_table3[]

static

Initial value:

= {
    -1, -1, -1, -1, 1, 2, 4, 6, -1, -1, -1, -1, 1, 2, 4, 6
}

Definition at line 55 of file vima.c.

const int8_t index_table4[]

static

Initial value:

= {
    -1, -1, -1, -1, -1, -1, -1, -1, 1,  1,  1,  2,  2,  4,  5,  6,
    -1, -1, -1, -1, -1, -1, -1, -1, 1,  1,  1,  2,  2,  4,  5,  6
}

Definition at line 59 of file vima.c.

const int8_t index_table5[]

static

Initial value:

= {
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
     1,  1,  1,  1,  1,  2,  2,  2,  2,  4,  4,  4,  5,  5,  6,  6,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
     1,  1,  1,  1,  1,  2,  2,  2,  2,  4,  4,  4,  5,  5,  6,  6
}

Definition at line 64 of file vima.c.

const int8_t index_table6[]

static

Initial value:

= {
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  2,  2,  2,  2,  2,  2,
     2,  2,  4,  4,  4,  4,  4,  4,  5,  5,  5,  5,  6,  6,  6,  6,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  2,  2,  2,  2,  2,  2,
     2,  2,  4,  4,  4,  4,  4,  4,  5,  5,  5,  5,  6,  6,  6,  6
}

Definition at line 71 of file vima.c.

const int8_t* const step_index_tables[]

static

Initial value:

= {
    index_table1, index_table2, index_table3,
    index_table4, index_table5, index_table6
}

Definition at line 82 of file vima.c.

Referenced by decode_frame().

AVCodec ff_adpcm_vima_decoder

Initial value:

= {
    .name         = "adpcm_vima",
    .long_name    = NULL_IF_CONFIG_SMALL("LucasArts VIMA audio"),
    .type         = AVMEDIA_TYPE_AUDIO,
    .id           = AV_CODEC_ID_ADPCM_VIMA,
    .init         = decode_init,
    .decode       = decode_frame,
    .capabilities = AV_CODEC_CAP_DR1,
}

Definition at line 210 of file vima.c.