speedhq.c File Reference

NewTek SpeedHQ decoder. More...

#include "libavutil/attributes.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "libavutil/thread.h"
#include "mathops.h"
#include "mpeg12.h"
#include "mpeg12data.h"
#include "mpeg12vlc.h"

Go to the source code of this file.

Data Structures
struct	SHQContext

Macros
#define	BITSTREAM_READER_LE
#define	MAX_INDEX   (64 - 1)
#define	ALPHA_VLC_BITS   5

Functions
static int	decode_dc_le (GetBitContext *gb, int component)
static int	decode_alpha_block (const SHQContext *s, GetBitContext *gb, uint8_t last_alpha[16], uint8_t *dest, int linesize)
static int	decode_dct_block (const SHQContext *s, GetBitContext *gb, int last_dc[4], int component, uint8_t *dest, int linesize)
static int	decode_speedhq_field (const SHQContext *s, const uint8_t *buf, int buf_size, AVFrame *frame, int field_number, int start, int end, int line_stride)
static void	compute_quant_matrix (int *output, int qscale)
static int	speedhq_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold void	compute_alpha_vlcs (void)
static uint32_t	reverse (uint32_t num, int bits)
static void	reverse_code (const uint16_t *code, const uint8_t *bits, uint16_t *reversed_code, int num_entries)
static av_cold void	speedhq_static_init (void)
static av_cold int	speedhq_decode_init (AVCodecContext *avctx)

Variables
static uint16_t	speedhq_vlc [123][2]
static const uint8_t	speedhq_level [121]
static const uint8_t	speedhq_run [121]
static RLTable	ff_rl_speedhq
static const uint8_t	unscaled_quant_matrix [64]
static uint8_t	ff_speedhq_static_rl_table_store [2][2 *MAX_RUN+MAX_LEVEL+3]
static VLC	ff_dc_lum_vlc_le
static VLC	ff_dc_chroma_vlc_le
static VLC	ff_dc_alpha_run_vlc_le
static VLC	ff_dc_alpha_level_vlc_le
AVCodec	ff_speedhq_decoder

Detailed Description

NewTek SpeedHQ decoder.

Definition in file speedhq.c.

Macro Definition Documentation

BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 27 of file speedhq.c.

MAX_INDEX

#define MAX_INDEX   (64 - 1)

Definition at line 40 of file speedhq.c.

Referenced by decode_dct_block().

ALPHA_VLC_BITS

#define ALPHA_VLC_BITS   5

Definition at line 46 of file speedhq.c.

Referenced by compute_alpha_vlcs(), and decode_alpha_block().

Function Documentation

decode_dc_le()

static int decode_dc_le ( GetBitContext *  gb, int  component  )

inlinestatic

Definition at line 162 of file speedhq.c.

Referenced by decode_dct_block().

decode_alpha_block()

static int decode_alpha_block ( const SHQContext *  s, GetBitContext *  gb, uint8_t  last_alpha[16], uint8_t *  dest, int  linesize  )

inlinestatic

Definition at line 183 of file speedhq.c.

Referenced by decode_speedhq_field().

decode_dct_block()

static int decode_dct_block ( const SHQContext *  s, GetBitContext *  gb, int  last_dc[4], int  component, uint8_t *  dest, int  linesize  )

inlinestatic

Definition at line 223 of file speedhq.c.

Referenced by decode_speedhq_field().

decode_speedhq_field()

static int decode_speedhq_field ( const SHQContext *  s, const uint8_t *  buf, int  buf_size, AVFrame *  frame, int  field_number, int  start, int  end, int  line_stride  )

static

Definition at line 280 of file speedhq.c.

Referenced by speedhq_decode_frame().

compute_quant_matrix()

static void compute_quant_matrix ( int *  output, int  qscale  )

static

Definition at line 409 of file speedhq.c.

Referenced by speedhq_decode_frame().

speedhq_decode_frame()

static int speedhq_decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 415 of file speedhq.c.

compute_alpha_vlcs()

static av_cold void compute_alpha_vlcs ( void  )

static

Definition at line 478 of file speedhq.c.

Referenced by speedhq_static_init().

reverse()

static uint32_t reverse ( uint32_t  num, int  bits  )

static

Definition at line 565 of file speedhq.c.

Referenced by ff_vector_fmul_window_altivec(), ff_vector_fmul_window_vsx(), filter_color2(), hybrid2_re(), reverse_code(), and speedhq_static_init().

reverse_code()

static void reverse_code ( const uint16_t *  code, const uint8_t *  bits, uint16_t *  reversed_code, int  num_entries  )

static

Definition at line 570 of file speedhq.c.

Referenced by speedhq_static_init().

speedhq_static_init()

static av_cold void speedhq_static_init ( void  )

static

Definition at line 579 of file speedhq.c.

Referenced by speedhq_decode_init().

speedhq_decode_init()

static av_cold int speedhq_decode_init ( AVCodecContext *  avctx )

static

Definition at line 611 of file speedhq.c.

Variable Documentation

speedhq_vlc

uint16_t speedhq_vlc[123][2]

static

Definition at line 61 of file speedhq.c.

Referenced by speedhq_static_init().

speedhq_level

const uint8_t speedhq_level[121]

static

Initial value:

= {
     1,  2,  3,  4,  5,  6,  7,  8,
     9, 10, 11, 12, 13, 14, 15, 16,
    17, 18, 19, 20, 21, 22, 23, 24,
    25, 26, 27, 28, 29, 30, 31, 32,
    33, 34, 35, 36, 37, 38, 39, 40,
     1,  2,  3,  4,  5,  6,  7,  8,
     9, 10, 11, 12, 13, 14, 15, 16,
    17, 18, 19, 20,  1,  2,  3,  4,
     5,  6,  7,  8,  9, 10, 11,  1,
     2,  3,  4,  5,  1,  2,  3,  4,
     1,  2,  3,  1,  2,  3,  1,  2,
     1,  2,  1,  2,  1,  2,  1,  2,
     1,  2,  1,  2,  1,  2,  1,  2,
     1,  2,  1,  1,  1,  1,  1,  1,
     1,  1,  1,  1,  1,  1,  1,  1,
     1,
}

Definition at line 97 of file speedhq.c.

speedhq_run

const uint8_t speedhq_run[121]

static

Initial value:

= {
     0,  0,  0,  0,  0,  0,  0,  0,
     0,  0,  0,  0,  0,  0,  0,  0,
     0,  0,  0,  0,  0,  0,  0,  0,
     0,  0,  0,  0,  0,  0,  0,  0,
     0,  0,  0,  0,  0,  0,  0,  0,
     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,  2,  2,  2,  3,
     3,  3,  3,  3,  4,  4,  4,  4,
     5,  5,  5,  6,  6,  6,  7,  7,
     8,  8,  9,  9, 10, 10, 11, 11,
    12, 12, 13, 13, 14, 14, 15, 15,
    16, 16, 17, 18, 19, 20, 21, 22,
    23, 24, 25, 26, 27, 28, 29, 30,
    31,
}

Definition at line 116 of file speedhq.c.

ff_rl_speedhq

RLTable ff_rl_speedhq

static

Initial value:

= {
    121,
    121,
    (const uint16_t (*)[])speedhq_vlc,
    speedhq_run,
    speedhq_level,
}

Definition at line 135 of file speedhq.c.

unscaled_quant_matrix

const uint8_t unscaled_quant_matrix[64]

static

Initial value:

= {
    16, 16, 19, 22, 26, 27, 29, 34,
    16, 16, 22, 24, 27, 29, 34, 37,
    19, 22, 26, 27, 29, 34, 34, 38,
    22, 22, 26, 27, 29, 34, 37, 40,
    22, 26, 27, 29, 32, 35, 40, 48,
    26, 27, 29, 32, 35, 40, 48, 58,
    26, 27, 29, 34, 38, 46, 56, 69,
    27, 29, 35, 38, 46, 56, 69, 83
}

Definition at line 144 of file speedhq.c.

Referenced by compute_quant_matrix().

ff_speedhq_static_rl_table_store

uint8_t ff_speedhq_static_rl_table_store[2][2 *MAX_RUN+MAX_LEVEL+3]

static

Definition at line 155 of file speedhq.c.

Referenced by speedhq_static_init().

ff_dc_lum_vlc_le

VLC ff_dc_lum_vlc_le

static

Definition at line 157 of file speedhq.c.

ff_dc_chroma_vlc_le

VLC ff_dc_chroma_vlc_le

static

Definition at line 158 of file speedhq.c.

ff_dc_alpha_run_vlc_le

VLC ff_dc_alpha_run_vlc_le

static

Definition at line 159 of file speedhq.c.

ff_dc_alpha_level_vlc_le

VLC ff_dc_alpha_level_vlc_le

static

Definition at line 160 of file speedhq.c.

ff_speedhq_decoder

AVCodec ff_speedhq_decoder

Initial value:

= {
    .name           = "speedhq",
    .long_name      = NULL_IF_CONFIG_SMALL("NewTek SpeedHQ"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_SPEEDHQ,
    .priv_data_size = sizeof(SHQContext),
    .init           = speedhq_decode_init,
    .decode         = speedhq_decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
}

Definition at line 681 of file speedhq.c.