hvirtual/quicktime/ffmpeg/libavcodec/svq1.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include "common.h"
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
#include "bswap.h"
#include <assert.h>
#include "svq1_cb.h"
#include "svq1_vlc.h"

Include dependency graph for svq1.c:

Go to the source code of this file.

Data Structures

struct  SVQ1Context
struct  svq1_pmv_s

Defines

#define SVQ1_BLOCK_SKIP   0
#define SVQ1_BLOCK_INTER   1
#define SVQ1_BLOCK_INTER_4V   2
#define SVQ1_BLOCK_INTRA   3
#define SVQ1_PROCESS_VECTOR()
#define SVQ1_ADD_CODEBOOK()
#define SVQ1_DO_CODEBOOK_INTRA()
#define SVQ1_DO_CODEBOOK_NONINTRA()
#define SVQ1_CALC_CODEBOOK_ENTRIES(cbook)
#define QUALITY_THRESHOLD   100
#define THRESHOLD_MULTIPLIER   0.6

Typedefs

typedef struct svq1_pmv_s svq1_pmv_t

Functions

static int svq1_decode_block_intra (GetBitContext *bitbuf, uint8_t *pixels, int pitch)
static int svq1_decode_block_non_intra (GetBitContext *bitbuf, uint8_t *pixels, int pitch)
static int svq1_decode_motion_vector (GetBitContext *bitbuf, svq1_pmv_t *mv, svq1_pmv_t **pmv)
static void svq1_skip_block (uint8_t *current, uint8_t *previous, int pitch, int x, int y)
static int svq1_motion_inter_block (MpegEncContext *s, GetBitContext *bitbuf, uint8_t *current, uint8_t *previous, int pitch, svq1_pmv_t *motion, int x, int y)
static int svq1_motion_inter_4v_block (MpegEncContext *s, GetBitContext *bitbuf, uint8_t *current, uint8_t *previous, int pitch, svq1_pmv_t *motion, int x, int y)
static int svq1_decode_delta_block (MpegEncContext *s, GetBitContext *bitbuf, uint8_t *current, uint8_t *previous, int pitch, svq1_pmv_t *motion, int x, int y)
static uint16_t svq1_packet_checksum (uint8_t *data, int length, int value)
static void svq1_parse_string (GetBitContext *bitbuf, uint8_t *out)
static int svq1_decode_frame_header (GetBitContext *bitbuf, MpegEncContext *s)
static int svq1_decode_frame (AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
static int svq1_decode_init (AVCodecContext *avctx)
static int svq1_decode_end (AVCodecContext *avctx)
static void svq1_write_header (SVQ1Context *s, int frame_type)
static int encode_block (SVQ1Context *s, uint8_t *src, uint8_t *ref, uint8_t *decoded, int stride, int level, int threshold, int lambda, int intra)

Variables

const uint8_t mvtab [33][2]
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 uint16_t checksum_table [256]
static const uint8_t string_table [256]
struct {
   int   width
   int   height
} svq1_frame_size_table [8]
AVCodec 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 svq1.c.

Define Documentation

#define QUALITY_THRESHOLD   100

Definition at line 928 of file svq1.c.

 
#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 191 of file svq1.c.

#define SVQ1_BLOCK_INTER   1

Definition at line 61 of file svq1.c.

Referenced by svq1_decode_delta_block().

#define SVQ1_BLOCK_INTER_4V   2

Definition at line 62 of file svq1.c.

Referenced by svq1_decode_delta_block().

#define SVQ1_BLOCK_INTRA   3

Definition at line 63 of file svq1.c.

Referenced by svq1_decode_delta_block().

#define SVQ1_BLOCK_SKIP   0

Definition at line 60 of file svq1.c.

Referenced by svq1_decode_delta_block().

#define SVQ1_CALC_CODEBOOK_ENTRIES ( cbook   ) 

Value:

codebook = (const uint32_t *) cbook[level];\
      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 + (mean >> 31)) << 16) | (mean & 0xFFFF);

Definition at line 240 of file svq1.c.

Referenced by svq1_decode_block_intra(), and svq1_decode_block_non_intra().

 
#define SVQ1_DO_CODEBOOK_INTRA (  ) 

Value:

for (y=0; y < height; y++) {\
        for (x=0; x < (width / 4); x++, codebook++) {\
        n1 = n4;\
        n2 = n4;\
        SVQ1_ADD_CODEBOOK()\
        /* store result */\
        dst[x] = (n1 << 8) | n2;\
        }\
        dst += (pitch / 4);\
      }

Definition at line 214 of file svq1.c.

Referenced by svq1_decode_block_intra().

 
#define SVQ1_DO_CODEBOOK_NONINTRA (  ) 

Value:

for (y=0; y < height; y++) {\
        for (x=0; x < (width / 4); x++, codebook++) {\
        n3 = dst[x];\
        /* add mean value to vector */\
        n1 = ((n3 & 0xFF00FF00) >> 8) + n4;\
        n2 =  (n3 & 0x00FF00FF)   + n4;\
        SVQ1_ADD_CODEBOOK()\
        /* store result */\
        dst[x] = (n1 << 8) | n2;\
        }\
        dst += (pitch / 4);\
      }

Definition at line 226 of file svq1.c.

Referenced by svq1_decode_block_non_intra().

 
#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_bits (bitbuf, 1) == 0)\
        break;\
      /* add child nodes */\
      list[n++] = list[i];\
      list[n++] = list[i] + (((level & 1) ? pitch : 1) << ((level / 2) + 1));\
    }

Definition at line 175 of file svq1.c.

Referenced by svq1_decode_block_intra(), and svq1_decode_block_non_intra().

#define THRESHOLD_MULTIPLIER   0.6

Definition at line 929 of file svq1.c.

Typedef Documentation

typedef struct svq1_pmv_s svq1_pmv_t

Function Documentation

static int encode_block ( SVQ1Context *  s,
uint8_t *  src,
uint8_t *  ref,
uint8_t *  decoded,
int  stride,
int  level,
int  threshold,
int  lambda,
int  intra 
) [static]

Definition at line 935 of file svq1.c.

References offset, put_bits(), SVQ1Context::reorder_pb, svq1_inter_codebook_sum, svq1_inter_codebooks, svq1_inter_mean_vlc, svq1_inter_multistage_vlc, svq1_intra_codebook_sum, svq1_intra_codebooks, svq1_intra_mean_vlc, and svq1_intra_multistage_vlc.

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

Definition at line 250 of file svq1.c.

References av_log(), AV_LOG_INFO, get_vlc2(), height, level, s, SVQ1_CALC_CODEBOOK_ENTRIES, SVQ1_DO_CODEBOOK_INTRA, svq1_intra_codebooks, SVQ1_PROCESS_VECTOR, VLC::table, and width.

Referenced by svq1_decode_delta_block(), and svq1_decode_frame().

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

Definition at line 305 of file svq1.c.

References av_log(), AV_LOG_INFO, get_vlc2(), height, level, s, SVQ1_CALC_CODEBOOK_ENTRIES, SVQ1_DO_CODEBOOK_NONINTRA, svq1_inter_codebooks, SVQ1_PROCESS_VECTOR, VLC::table, and width.

Referenced by svq1_decode_delta_block().

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static int svq1_decode_delta_block ( MpegEncContext *  s,
GetBitContext *  bitbuf,
uint8_t *  current,
uint8_t *  previous,
int  pitch,
svq1_pmv_t *  motion,
int  x,
int  y 
) [static]

Definition at line 529 of file svq1.c.

References av_log(), AV_LOG_INFO, MpegEncContext::avctx, get_vlc2(), SVQ1_BLOCK_INTER, SVQ1_BLOCK_INTER_4V, SVQ1_BLOCK_INTRA, SVQ1_BLOCK_SKIP, svq1_decode_block_intra(), svq1_decode_block_non_intra(), svq1_motion_inter_4v_block(), svq1_motion_inter_block(), svq1_skip_block(), VLC::table, svq1_pmv_s::x, and svq1_pmv_s::y.

Referenced by svq1_decode_frame().

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static int svq1_decode_end ( AVCodecContext *  avctx  )  [static]

Definition at line 875 of file svq1.c.

References MPV_common_end(), AVCodecContext::priv_data, and s.

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static int svq1_decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  data_size,
uint8_t *  buf,
int  buf_size 
) [static]

Definition at line 709 of file svq1.c.

References av_log(), AV_LOG_INFO, MpegEncContext::avctx, AVDISCARD_ALL, AVDISCARD_NONKEY, AVDISCARD_NONREF, B_TYPE, CODEC_FLAG_GRAY, MpegEncContext::current_picture, MpegEncContext::f_code, MpegEncContext::flags, MpegEncContext::gb, get_bits(), MpegEncContext::height, AVCodecContext::hurry_up, I_TYPE, init_get_bits(), MpegEncContext::last_picture, MpegEncContext::last_picture_ptr, MpegEncContext::linesize, MPV_frame_end(), MPV_frame_start(), MpegEncContext::next_picture, NULL, MpegEncContext::pict_type, AVCodecContext::priv_data, s, AVCodecContext::skip_frame, src, svq1_decode_block_intra(), svq1_decode_delta_block(), svq1_decode_frame_header(), MpegEncContext::uvlinesize, MpegEncContext::width, svq1_pmv_s::x, and svq1_pmv_s::y.

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static int svq1_decode_frame_header ( GetBitContext *  bitbuf,
MpegEncContext *  s 
) [static]

Definition at line 634 of file svq1.c.

References av_log(), AV_LOG_INFO, MpegEncContext::avctx, GetBitContext::buffer, MpegEncContext::f_code, get_bits(), MpegEncContext::height, I_TYPE, MpegEncContext::pict_type, GetBitContext::size_in_bits, skip_bits(), skip_bits1(), svq1_frame_size_table, svq1_packet_checksum(), svq1_parse_string(), and MpegEncContext::width.

Referenced by svq1_decode_frame().

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static int svq1_decode_init ( AVCodecContext *  avctx  )  [static]

Definition at line 831 of file svq1.c.

References MpegEncContext::avctx, AVCodecContext::codec, MpegEncContext::codec_id, AVCodecContext::flags, MpegEncContext::flags, AVCodecContext::has_b_frames, AVCodecContext::height, MpegEncContext::height, AVCodec::id, init_vlc(), MPV_common_init(), MPV_decode_defaults(), mvtab, AVCodecContext::pix_fmt, PIX_FMT_YUV410P, AVCodecContext::priv_data, s, svq1_block_type_vlc, svq1_inter_mean_vlc, svq1_inter_multistage_vlc, svq1_intra_mean_vlc, svq1_intra_multistage_vlc, AVCodecContext::width, and MpegEncContext::width.

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static int svq1_decode_motion_vector ( GetBitContext *  bitbuf,
svq1_pmv_t *  mv,
svq1_pmv_t **  pmv 
) [static]

Definition at line 348 of file svq1.c.

References get_bits1(), get_vlc2(), VLC::table, svq1_pmv_s::x, and svq1_pmv_s::y.

Referenced by svq1_motion_inter_4v_block(), and svq1_motion_inter_block().

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static int svq1_motion_inter_4v_block ( MpegEncContext *  s,
GetBitContext *  bitbuf,
uint8_t *  current,
uint8_t *  previous,
int  pitch,
svq1_pmv_t *  motion,
int  x,
int  y 
) [static]

XXX /FIXME cliping or padding?

Definition at line 439 of file svq1.c.

References av_log(), AV_LOG_INFO, MpegEncContext::avctx, MpegEncContext::dsp, MpegEncContext::height, mv, DSPContext::put_pixels_tab, src, svq1_decode_motion_vector(), and MpegEncContext::width.

Referenced by svq1_decode_delta_block().

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static int svq1_motion_inter_block ( MpegEncContext *  s,
GetBitContext *  bitbuf,
uint8_t *  current,
uint8_t *  previous,
int  pitch,
svq1_pmv_t *  motion,
int  x,
int  y 
) [static]

Definition at line 387 of file svq1.c.

References av_log(), AV_LOG_INFO, MpegEncContext::avctx, MpegEncContext::dsp, MpegEncContext::height, mv, DSPContext::put_pixels_tab, src, svq1_decode_motion_vector(), MpegEncContext::width, svq1_pmv_s::x, and svq1_pmv_s::y.

Referenced by svq1_decode_delta_block().

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static uint16_t svq1_packet_checksum ( uint8_t *  data,
int  length,
int  value 
) [static]

Definition at line 593 of file svq1.c.

References checksum_table.

Referenced by svq1_decode_frame_header().

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

Definition at line 620 of file svq1.c.

References get_bits(), and string_table.

Referenced by svq1_decode_frame_header().

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

Definition at line 372 of file svq1.c.

References memcpy, and src.

Referenced by svq1_decode_delta_block().

static void svq1_write_header ( SVQ1Context *  s,
int  frame_type 
) [static]

Definition at line 883 of file svq1.c.

References SVQ1Context::frame_height, SVQ1Context::frame_width, I_TYPE, SVQ1Context::pb, put_bits(), and svq1_frame_size_table.

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Variable Documentation

const uint16_t checksum_table[256] [static]

Definition at line 105 of file svq1.c.

Referenced by svq1_packet_checksum().

int height

Definition at line 588 of file svq1.c.

const uint8_t mvtab[33][2]

Definition at line 81 of file h263data.h.

const uint8_t string_table[256] [static]

Definition at line 140 of file svq1.c.

Referenced by svq1_parse_string().

VLC svq1_block_type [static]

Definition at line 53 of file svq1.c.

AVCodec svq1_decoder

Initial value:

 {
    "svq1",
    CODEC_TYPE_VIDEO,
    CODEC_ID_SVQ1,
    sizeof(MpegEncContext),
    svq1_decode_init,
    NULL,
    svq1_decode_end,
    svq1_decode_frame,
    CODEC_CAP_DR1,
    .flush= ff_mpeg_flush,
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV410P, -1},
}

Definition at line 1391 of file svq1.c.

Referenced by avcodec_register_all().

struct { ... } svq1_frame_size_table[8] [static]

Referenced by svq1_decode_frame_header(), and svq1_write_header().

VLC svq1_inter_mean [static]

Definition at line 58 of file svq1.c.

VLC svq1_inter_multistage[6] [static]

Definition at line 56 of file svq1.c.

VLC svq1_intra_mean [static]

Definition at line 57 of file svq1.c.

VLC svq1_intra_multistage[6] [static]

Definition at line 55 of file svq1.c.

VLC svq1_motion_component [static]

Definition at line 54 of file svq1.c.

int width

Definition at line 588 of file svq1.c.

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