FFmpeg
Data Structures | Macros | Functions | Variables
svq1dec.c File Reference

Sorenson Vector Quantizer #1 (SVQ1) video codec. More...

#include "libavutil/crc.h"
#include "avcodec.h"
#include "get_bits.h"
#include "h263.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
 
struct  SVQ1Context
 

Macros

#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, void *data, int *got_frame, AVPacket *avpkt)
 
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]
 
AVCodec 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

#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));\
}
if(ret)
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
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
uint8_t level
Definition: svq3.c:205
int i
Definition: input.c:407

Definition at line 107 of file svq1dec.c.

Referenced by svq1_decode_block_intra(), and svq1_decode_block_non_intra().

#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; \
}
static const unsigned codebook[256][2]
Definition: cfhdenc.c:41
if(ret)
for(j=16;j >0;--j)

Definition at line 123 of file svq1dec.c.

Referenced by svq1_decode_block_intra(), and svq1_decode_block_non_intra().

#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;
static const unsigned codebook[256][2]
Definition: cfhdenc.c:41
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
if(ret)
uint8_t level
Definition: svq3.c:205
for(j=16;j >0;--j)

Definition at line 146 of file svq1dec.c.

Referenced by svq1_decode_block_intra(), and svq1_decode_block_non_intra().

Function Documentation

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

Definition at line 158 of file svq1dec.c.

Referenced by svq1_decode_delta_block(), and svq1_decode_frame().

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

Definition at line 225 of file svq1dec.c.

Referenced by svq1_decode_delta_block().

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

Definition at line 285 of file svq1dec.c.

Referenced by svq1_motion_inter_4v_block(), and svq1_motion_inter_block().

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

Definition at line 311 of file svq1dec.c.

Referenced by svq1_decode_delta_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 328 of file svq1dec.c.

Referenced by svq1_decode_delta_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 371 of file svq1dec.c.

Referenced by 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 448 of file svq1dec.c.

Referenced by svq1_decode_frame().

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

Definition at line 505 of file svq1dec.c.

Referenced by svq1_decode_frame_header().

static int svq1_decode_frame_header ( AVCodecContext avctx,
AVFrame frame 
)
static

Definition at line 520 of file svq1dec.c.

Referenced by svq1_decode_frame().

static int svq1_decode_frame ( AVCodecContext avctx,
void data,
int got_frame,
AVPacket avpkt 
)
static

Definition at line 613 of file svq1dec.c.

static av_cold int svq1_decode_init ( AVCodecContext avctx)
static

Definition at line 765 of file svq1dec.c.

static av_cold int svq1_decode_end ( AVCodecContext avctx)
static

Definition at line 820 of file svq1dec.c.

static void svq1_flush ( AVCodecContext avctx)
static

Definition at line 831 of file svq1dec.c.

Variable Documentation

VLC svq1_block_type
static

Definition at line 45 of file svq1dec.c.

VLC svq1_motion_component
static

Definition at line 46 of file svq1dec.c.

VLC svq1_intra_multistage[6]
static

Definition at line 47 of file svq1dec.c.

VLC svq1_inter_multistage[6]
static

Definition at line 48 of file svq1dec.c.

VLC svq1_intra_mean
static

Definition at line 49 of file svq1dec.c.

VLC svq1_inter_mean
static

Definition at line 50 of file svq1dec.c.

const uint8_t string_table[256]
static

Definition at line 72 of file svq1dec.c.

Referenced by svq1_parse_string().

AVCodec ff_svq1_decoder
Initial value:
= {
.name = "svq1",
.long_name = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),
.priv_data_size = sizeof(SVQ1Context),
.close = svq1_decode_end,
.capabilities = AV_CODEC_CAP_DR1,
}
static void flush(AVCodecContext *avctx)
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
static av_cold int svq1_decode_end(AVCodecContext *avctx)
Definition: svq1dec.c:820
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
static void svq1_flush(AVCodecContext *avctx)
Definition: svq1dec.c:831
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:300
static int svq1_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: svq1dec.c:613
static av_cold int svq1_decode_init(AVCodecContext *avctx)
Definition: svq1dec.c:765
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50

Definition at line 838 of file svq1dec.c.