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svq1dec.c File Reference
#include "libavutil/crc.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "get_bits.h"
#include "h263data.h"
#include "hpeldsp.h"
#include "internal.h"
#include "mathops.h"
#include "svq1.h"

Go to the source code of this file.

Data Structures

struct  svq1_pmv_s
 
struct  SVQ1Context
 

Macros

#define SVQ1_BLOCK_TYPE_VLC_BITS   3
 
#define SVQ1_PROCESS_VECTOR()
 
#define SVQ1_ADD_CODEBOOK()
 
#define SVQ1_CALC_CODEBOOK_ENTRIES(cbook)
 

Functions

static int svq1_decode_block_intra (GetBitContext *bitbuf, uint8_t *pixels, ptrdiff_t pitch)
 
static int svq1_decode_block_non_intra (GetBitContext *bitbuf, uint8_t *pixels, ptrdiff_t pitch)
 
static int svq1_decode_motion_vector (GetBitContext *bitbuf, svq1_pmv *mv, svq1_pmv **pmv)
 
static void svq1_skip_block (uint8_t *current, uint8_t *previous, ptrdiff_t pitch, int x, int y)
 
static int svq1_motion_inter_block (HpelDSPContext *hdsp, GetBitContext *bitbuf, uint8_t *current, uint8_t *previous, ptrdiff_t pitch, svq1_pmv *motion, int x, int y, int width, int height)
 
static int svq1_motion_inter_4v_block (HpelDSPContext *hdsp, GetBitContext *bitbuf, uint8_t *current, uint8_t *previous, ptrdiff_t pitch, svq1_pmv *motion, int x, int y, int width, int height)
 
static int svq1_decode_delta_block (AVCodecContext *avctx, HpelDSPContext *hdsp, GetBitContext *bitbuf, uint8_t *current, uint8_t *previous, ptrdiff_t pitch, svq1_pmv *motion, int x, int y, int width, int height)
 
static void svq1_parse_string (GetBitContext *bitbuf, uint8_t out[257])
 
static int svq1_decode_frame_header (AVCodecContext *avctx, AVFrame *frame)
 
static int svq1_decode_frame (AVCodecContext *avctx, AVFrame *cur, int *got_frame, AVPacket *avpkt)
 
static av_cold void svq1_static_init (void)
 
static av_cold int svq1_decode_init (AVCodecContext *avctx)
 
static av_cold int svq1_decode_end (AVCodecContext *avctx)
 
static void svq1_flush (AVCodecContext *avctx)
 

Variables

static VLC svq1_block_type
 
static VLC svq1_motion_component
 
static VLC svq1_intra_multistage [6]
 
static VLC svq1_inter_multistage [6]
 
static VLC svq1_intra_mean
 
static VLC svq1_inter_mean
 
static const uint8_t string_table [256]
 
const FFCodec ff_svq1_decoder
 

Detailed Description

Sorenson Vector Quantizer #1 (SVQ1) video codec. For more information of the SVQ1 algorithm, visit: http://www.pcisys.net/~melanson/codecs/

Definition in file svq1dec.c.

Macro Definition Documentation

◆ SVQ1_BLOCK_TYPE_VLC_BITS

#define SVQ1_BLOCK_TYPE_VLC_BITS   3

Definition at line 47 of file svq1dec.c.

◆ SVQ1_PROCESS_VECTOR

#define SVQ1_PROCESS_VECTOR ( )
Value:
for (; level > 0; i++) { \
/* process next depth */ \
if (i == m) { \
m = n; \
if (--level == 0) \
break; \
} \
/* divide block if next bit set */ \
if (!get_bits1(bitbuf)) \
break; \
/* add child nodes */ \
list[n++] = list[i]; \
list[n++] = list[i] + (((level & 1) ? pitch : 1) << ((level >> 1) + 1));\
}

Definition at line 113 of file svq1dec.c.

◆ SVQ1_ADD_CODEBOOK

#define SVQ1_ADD_CODEBOOK ( )
Value:
/* add codebook entries to vector */ \
for (j = 0; j < stages; j++) { \
n3 = codebook[entries[j]] ^ 0x80808080; \
n1 += (n3 & 0xFF00FF00) >> 8; \
n2 += n3 & 0x00FF00FF; \
} \
\
/* clip to [0..255] */ \
if (n1 & 0xFF00FF00) { \
n3 = (n1 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
n1 += 0x7F007F00; \
n1 |= (~n1 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
n1 &= n3 & 0x00FF00FF; \
} \
\
if (n2 & 0xFF00FF00) { \
n3 = (n2 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
n2 += 0x7F007F00; \
n2 |= (~n2 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
n2 &= n3 & 0x00FF00FF; \
}

Definition at line 129 of file svq1dec.c.

◆ SVQ1_CALC_CODEBOOK_ENTRIES

#define SVQ1_CALC_CODEBOOK_ENTRIES (   cbook)
Value:
codebook = (const uint32_t *)cbook[level]; \
if (stages > 0) \
bit_cache = get_bits(bitbuf, 4 * stages); \
/* calculate codebook entries for this vector */ \
for (j = 0; j < stages; j++) { \
entries[j] = (((bit_cache >> (4 * (stages - j - 1))) & 0xF) + \
16 * j) << (level + 1); \
} \
mean -= stages * 128; \
n4 = (mean << 16) + mean;

Definition at line 152 of file svq1dec.c.

Function Documentation

◆ svq1_decode_block_intra()

static int svq1_decode_block_intra ( GetBitContext *  bitbuf,
uint8_t *  pixels,
ptrdiff_t  pitch 
)
static

Definition at line 164 of file svq1dec.c.

Referenced by svq1_decode_delta_block(), and svq1_decode_frame().

◆ svq1_decode_block_non_intra()

static int svq1_decode_block_non_intra ( GetBitContext *  bitbuf,
uint8_t *  pixels,
ptrdiff_t  pitch 
)
static

Definition at line 231 of file svq1dec.c.

Referenced by svq1_decode_delta_block().

◆ svq1_decode_motion_vector()

static int svq1_decode_motion_vector ( GetBitContext *  bitbuf,
svq1_pmv *  mv,
svq1_pmv **  pmv 
)
static

Definition at line 291 of file svq1dec.c.

Referenced by svq1_motion_inter_4v_block(), and svq1_motion_inter_block().

◆ svq1_skip_block()

static void svq1_skip_block ( uint8_t *  current,
uint8_t *  previous,
ptrdiff_t  pitch,
int  x,
int  y 
)
static

Definition at line 317 of file svq1dec.c.

Referenced by svq1_decode_delta_block().

◆ svq1_motion_inter_block()

static int svq1_motion_inter_block ( HpelDSPContext *  hdsp,
GetBitContext *  bitbuf,
uint8_t *  current,
uint8_t *  previous,
ptrdiff_t  pitch,
svq1_pmv *  motion,
int  x,
int  y,
int  width,
int  height 
)
static

Definition at line 334 of file svq1dec.c.

Referenced by svq1_decode_delta_block().

◆ svq1_motion_inter_4v_block()

static int svq1_motion_inter_4v_block ( HpelDSPContext *  hdsp,
GetBitContext *  bitbuf,
uint8_t *  current,
uint8_t *  previous,
ptrdiff_t  pitch,
svq1_pmv *  motion,
int  x,
int  y,
int  width,
int  height 
)
static

Definition at line 377 of file svq1dec.c.

Referenced by svq1_decode_delta_block().

◆ svq1_decode_delta_block()

static int svq1_decode_delta_block ( AVCodecContext *  avctx,
HpelDSPContext *  hdsp,
GetBitContext *  bitbuf,
uint8_t *  current,
uint8_t *  previous,
ptrdiff_t  pitch,
svq1_pmv *  motion,
int  x,
int  y,
int  width,
int  height 
)
static

Definition at line 454 of file svq1dec.c.

Referenced by svq1_decode_frame().

◆ svq1_parse_string()

static void svq1_parse_string ( GetBitContext *  bitbuf,
uint8_t  out[257] 
)
static

Definition at line 512 of file svq1dec.c.

Referenced by svq1_decode_frame_header().

◆ svq1_decode_frame_header()

static int svq1_decode_frame_header ( AVCodecContext *  avctx,
AVFrame *  frame 
)
static

Definition at line 527 of file svq1dec.c.

Referenced by svq1_decode_frame().

◆ svq1_decode_frame()

static int svq1_decode_frame ( AVCodecContext *  avctx,
AVFrame *  cur,
int *  got_frame,
AVPacket *  avpkt 
)
static

Definition at line 620 of file svq1dec.c.

◆ svq1_static_init()

static av_cold void svq1_static_init ( void  )
static

Definition at line 767 of file svq1dec.c.

Referenced by svq1_decode_init().

◆ svq1_decode_init()

static av_cold int svq1_decode_init ( AVCodecContext *  avctx)
static

Definition at line 806 of file svq1dec.c.

◆ svq1_decode_end()

static av_cold int svq1_decode_end ( AVCodecContext *  avctx)
static

Definition at line 826 of file svq1dec.c.

◆ svq1_flush()

static void svq1_flush ( AVCodecContext *  avctx)
static

Definition at line 839 of file svq1dec.c.

Variable Documentation

◆ svq1_block_type

VLC svq1_block_type
static

Definition at line 48 of file svq1dec.c.

Referenced by svq1_decode_delta_block(), and svq1_static_init().

◆ svq1_motion_component

VLC svq1_motion_component
static

Definition at line 49 of file svq1dec.c.

Referenced by svq1_decode_motion_vector(), and svq1_static_init().

◆ svq1_intra_multistage

VLC svq1_intra_multistage[6]
static

Definition at line 50 of file svq1dec.c.

Referenced by svq1_decode_block_intra(), and svq1_static_init().

◆ svq1_inter_multistage

VLC svq1_inter_multistage[6]
static

Definition at line 51 of file svq1dec.c.

Referenced by svq1_decode_block_non_intra(), and svq1_static_init().

◆ svq1_intra_mean

VLC svq1_intra_mean
static

Definition at line 52 of file svq1dec.c.

Referenced by svq1_decode_block_intra(), and svq1_static_init().

◆ svq1_inter_mean

VLC svq1_inter_mean
static

Definition at line 53 of file svq1dec.c.

Referenced by svq1_decode_block_non_intra(), and svq1_static_init().

◆ string_table

const uint8_t string_table[256]
static

Definition at line 78 of file svq1dec.c.

Referenced by svq1_parse_string().

◆ ff_svq1_decoder

const FFCodec ff_svq1_decoder
Initial value:
= {
.p.name = "svq1",
.p.long_name = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_SVQ1,
.priv_data_size = sizeof(SVQ1Context),
.init = svq1_decode_init,
.close = svq1_decode_end,
FF_CODEC_DECODE_CB(svq1_decode_frame),
.p.capabilities = AV_CODEC_CAP_DR1,
.flush = svq1_flush,
.p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV410P,
AV_PIX_FMT_NONE },
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
}

Definition at line 846 of file svq1dec.c.

AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
level
uint8_t level
Definition: svq3.c:206
init
static int init
Definition: av_tx.c:47
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
svq1_decode_end
static av_cold int svq1_decode_end(AVCodecContext *avctx)
Definition: svq1dec.c:826
svq1_decode_frame
static int svq1_decode_frame(AVCodecContext *avctx, AVFrame *cur, int *got_frame, AVPacket *avpkt)
Definition: svq1dec.c:620
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:254
SVQ1Context
Definition: svq1dec.c:61
if
if(ret)
Definition: filter_design.txt:179
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
list
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining list
Definition: filter_design.txt:25
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
svq1_flush
static void svq1_flush(AVCodecContext *avctx)
Definition: svq1dec.c:839
AV_CODEC_ID_SVQ1
@ AV_CODEC_ID_SVQ1
Definition: codec_id.h:72
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: codec_internal.h:31
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
mean
static float mean(const float *input, int size)
Definition: vf_nnedi.c:857
svq1_decode_init
static av_cold int svq1_decode_init(AVCodecContext *avctx)
Definition: svq1dec.c:806
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
codebook
static const unsigned codebook[256][2]
Definition: cfhdenc.c:42
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