qdmc.c File Reference

#include <math.h>
#include <stddef.h>
#include <stdio.h>
#include "libavutil/channel_layout.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "internal.h"
#include "fft.h"

Go to the source code of this file.

Data Structures
struct	QDMCTone
struct	QDMCContext

Macros
#define	BITSTREAM_READER_LE

Functions
static av_cold void	qdmc_init_static_data (void)
static void	make_noises (QDMCContext *s)
static av_cold int	qdmc_decode_init (AVCodecContext *avctx)
static av_cold int	qdmc_decode_close (AVCodecContext *avctx)
static int	qdmc_get_vlc (GetBitContext *gb, VLC *table, int flag)
static int	skip_label (QDMCContext *s, GetBitContext *gb)
static int	read_noise_data (QDMCContext *s, GetBitContext *gb)
static void	add_tone (QDMCContext *s, int group, int offset, int freq, int stereo_mode, int amplitude, int phase)
static int	read_wave_data (QDMCContext *s, GetBitContext *gb)
static void	lin_calc (QDMCContext *s, float amplitude, int node1, int node2, int index)
static void	add_noise (QDMCContext *s, int ch, int current_subframe)
static void	add_wave (QDMCContext *s, int offset, int freqs, int group, int stereo_mode, int amp, int phase)
static void	add_wave0 (QDMCContext *s, int offset, int freqs, int stereo_mode, int amp, int phase)
static void	add_waves (QDMCContext *s, int current_subframe)
static int	decode_frame (QDMCContext *s, GetBitContext *gb, int16_t *out)
static av_cold void	qdmc_flush (AVCodecContext *avctx)
static int	qdmc_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)

Variables
static float	sin_table [512]
static VLC	vtable [6]
static const unsigned	code_prefix []
static const float	amplitude_tab [64]
static const uint16_t	qdmc_nodes [112]
static const uint8_t	noise_bands_size []
static const uint8_t	noise_bands_selector []
static const uint8_t	qdmc_hufftab [][2]
static const uint8_t	huff_sizes []
static const uint8_t	huff_bits []
AVCodec	ff_qdmc_decoder

Macro Definition Documentation

BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 26 of file qdmc.c.

Function Documentation

qdmc_init_static_data()

static av_cold void qdmc_init_static_data ( void  )

static

Definition at line 163 of file qdmc.c.

Referenced by qdmc_decode_init().

make_noises()

static void make_noises ( QDMCContext *  s )

static

Definition at line 183 of file qdmc.c.

Referenced by qdmc_decode_init().

qdmc_decode_init()

static av_cold int qdmc_decode_init ( AVCodecContext *  avctx )

static

Definition at line 205 of file qdmc.c.

qdmc_decode_close()

static av_cold int qdmc_decode_close ( AVCodecContext *  avctx )

static

Definition at line 310 of file qdmc.c.

qdmc_get_vlc()

static int qdmc_get_vlc ( GetBitContext *  gb, VLC *  table, int  flag  )

static

Definition at line 319 of file qdmc.c.

Referenced by read_noise_data(), and read_wave_data().

skip_label()

static int skip_label ( QDMCContext *  s, GetBitContext *  gb  )

static

Definition at line 339 of file qdmc.c.

Referenced by decode_frame().

read_noise_data()

static int read_noise_data ( QDMCContext *  s, GetBitContext *  gb  )

static

Definition at line 355 of file qdmc.c.

Referenced by decode_frame().

add_tone()

static void add_tone ( QDMCContext *  s, int  group, int  offset, int  freq, int  stereo_mode, int  amplitude, int  phase  )

static

Definition at line 403 of file qdmc.c.

Referenced by read_wave_data().

read_wave_data()

static int read_wave_data ( QDMCContext *  s, GetBitContext *  gb  )

static

Definition at line 420 of file qdmc.c.

Referenced by decode_frame().

lin_calc()

static void lin_calc ( QDMCContext *  s, float  amplitude, int  node1, int  node2, int  index  )

static

Definition at line 482 of file qdmc.c.

Referenced by add_noise().

add_noise()

static void add_noise ( QDMCContext *  s, int  ch, int  current_subframe  )

static

Definition at line 508 of file qdmc.c.

Referenced by decode_frame().

add_wave()

static void add_wave ( QDMCContext *  s, int  offset, int  freqs, int  group, int  stereo_mode, int  amp, int  phase  )

static

Definition at line 542 of file qdmc.c.

Referenced by add_waves().

add_wave0()

static void add_wave0 ( QDMCContext *  s, int  offset, int  freqs, int  stereo_mode, int  amp, int  phase  )

static

Definition at line 574 of file qdmc.c.

Referenced by add_waves().

add_waves()

static void add_waves ( QDMCContext *  s, int  current_subframe  )

static

Definition at line 592 of file qdmc.c.

Referenced by decode_frame().

decode_frame()

static int decode_frame ( QDMCContext *  s, GetBitContext *  gb, int16_t *  out  )

static

Definition at line 616 of file qdmc.c.

Referenced by qdmc_decode_frame().

qdmc_flush()

static av_cold void qdmc_flush ( AVCodecContext *  avctx )

static

Definition at line 685 of file qdmc.c.

Referenced by qdmc_decode_frame().

qdmc_decode_frame()

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

static

Definition at line 695 of file qdmc.c.

Variable Documentation

sin_table

float sin_table[512]

static

Definition at line 73 of file qdmc.c.

Referenced by add_wave(), add_wave0(), qdmc_decode_init(), and qdmc_init_static_data().

vtable

VLC vtable[6]

static

Definition at line 74 of file qdmc.c.

Referenced by qdmc_init_static_data(), read_noise_data(), and read_wave_data().

code_prefix

const unsigned code_prefix[]

static

Initial value:

= {
    0x0, 0x1, 0x2, 0x3, 0x4, 0x6, 0x8, 0xA,
    0xC, 0x10, 0x14, 0x18, 0x1C, 0x24, 0x2C, 0x34,
    0x3C, 0x4C, 0x5C, 0x6C, 0x7C, 0x9C, 0xBC, 0xDC,
    0xFC, 0x13C, 0x17C, 0x1BC, 0x1FC, 0x27C, 0x2FC, 0x37C,
    0x3FC, 0x4FC, 0x5FC, 0x6FC, 0x7FC, 0x9FC, 0xBFC, 0xDFC,
    0xFFC, 0x13FC, 0x17FC, 0x1BFC, 0x1FFC, 0x27FC, 0x2FFC, 0x37FC,
    0x3FFC, 0x4FFC, 0x5FFC, 0x6FFC, 0x7FFC, 0x9FFC, 0xBFFC, 0xDFFC,
    0xFFFC, 0x13FFC, 0x17FFC, 0x1BFFC, 0x1FFFC, 0x27FFC, 0x2FFFC, 0x37FFC,
    0x3FFFC
}

Definition at line 76 of file qdmc.c.

Referenced by build_table(), and qdmc_get_vlc().

amplitude_tab

const float amplitude_tab[64]

static

Initial value:

= {
    1.18750000f, 1.68359380f, 2.37500000f, 3.36718750f, 4.75000000f,
    6.73437500f, 9.50000000f, 13.4687500f, 19.0000000f, 26.9375000f,
    38.0000000f, 53.8750000f, 76.0000000f, 107.750000f, 152.000000f,
    215.500000f, 304.000000f, 431.000000f, 608.000000f, 862.000000f,
    1216.00000f, 1724.00000f, 2432.00000f, 3448.00000f, 4864.00000f,
    6896.00000f, 9728.00000f, 13792.0000f, 19456.0000f, 27584.0000f,
    38912.0000f, 55168.0000f, 77824.0000f, 110336.000f, 155648.000f,
    220672.000f, 311296.000f, 441344.000f, 622592.000f, 882688.000f,
    1245184.00f, 1765376.00f, 2490368.00f, 3530752.00f, 4980736.00f,
    7061504.00f, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
}

Definition at line 88 of file qdmc.c.

Referenced by add_noise(), add_wave(), and add_wave0().

qdmc_nodes

const uint16_t qdmc_nodes[112]

static

Initial value:

= {
    0, 1, 2, 4, 6, 8, 12, 16, 24, 32, 48, 56, 64,
    80, 96, 120, 144, 176, 208, 240, 256,
    0, 2, 4, 8, 16, 24, 32, 48, 56, 64, 80, 104,
    128, 160, 208, 256, 0, 0, 0, 0, 0,
    0, 2, 4, 8, 16, 32, 48, 64, 80, 112, 160, 208,
    256, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 4, 8, 16, 32, 48, 64, 96, 144, 208, 256,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 4, 16, 32, 64, 256, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
}

Definition at line 101 of file qdmc.c.

Referenced by add_noise(), and make_noises().

noise_bands_size

const uint8_t noise_bands_size[]

static

Initial value:

= {
    19, 14, 11, 9, 4, 2, 0
}

Definition at line 114 of file qdmc.c.

Referenced by add_noise(), make_noises(), and read_noise_data().

noise_bands_selector

const uint8_t noise_bands_selector[]

static

Initial value:

= {
    4, 3, 2, 1, 0, 0, 0,
}

Definition at line 118 of file qdmc.c.

Referenced by qdmc_decode_init().

qdmc_hufftab

const uint8_t qdmc_hufftab[][2]

static

Definition at line 122 of file qdmc.c.

Referenced by qdmc_init_static_data().

huff_sizes

const uint8_t huff_sizes[]

static

Initial value:

= {
    27, 12, 28, 47, 9, 9
}

Definition at line 155 of file qdmc.c.

Referenced by qdmc_init_static_data().

huff_bits

const uint8_t huff_bits[]

static

Initial value:

= {
    12, 10, 12, 12, 8, 6
}

Definition at line 159 of file qdmc.c.

Referenced by qdmc_init_static_data().

ff_qdmc_decoder

AVCodec ff_qdmc_decoder

Initial value:

= {
    .name             = "qdmc",
    .long_name        = NULL_IF_CONFIG_SMALL("QDesign Music Codec 1"),
    .type             = AVMEDIA_TYPE_AUDIO,
    .id               = AV_CODEC_ID_QDMC,
    .priv_data_size   = sizeof(QDMCContext),
    .init             = qdmc_decode_init,
    .close            = qdmc_decode_close,
    .decode           = qdmc_decode_frame,
    .flush            = qdmc_flush,
    .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
    .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE,
}

Definition at line 728 of file qdmc.c.