libavcodec/proresdec2.c File Reference

Known FOURCCs: 'apch' (HQ), 'apcn' (SD), 'apcs' (LT), 'acpo' (Proxy), 'ap4h' (4444). More...

#include "avcodec.h"
#include "get_bits.h"
#include "simple_idct.h"
#include "proresdec.h"

Go to the source code of this file.

Defines

#define LONG_BITSTREAM_READER
#define DECODE_CODEWORD(val, codebook)
#define TOSIGNED(x)   (((x) >> 1) ^ (-((x) & 1)))
#define FIRST_DC_CB   0xB8

Functions

static void permute (uint8_t *dst, const uint8_t *src, const uint8_t permutation[64])
static av_cold int decode_init (AVCodecContext *avctx)
static int decode_frame_header (ProresContext *ctx, const uint8_t *buf, const int data_size, AVCodecContext *avctx)
static int decode_picture_header (AVCodecContext *avctx, const uint8_t *buf, const int buf_size)
static av_always_inline void decode_dc_coeffs (GetBitContext *gb, DCTELEM *out, int blocks_per_slice)
static av_always_inline void decode_ac_coeffs (AVCodecContext *avctx, GetBitContext *gb, DCTELEM *out, int blocks_per_slice)
static void decode_slice_luma (AVCodecContext *avctx, SliceContext *slice, uint8_t *dst, int dst_stride, const uint8_t *buf, unsigned buf_size, const int16_t *qmat)
static void decode_slice_chroma (AVCodecContext *avctx, SliceContext *slice, uint8_t *dst, int dst_stride, const uint8_t *buf, unsigned buf_size, const int16_t *qmat, int log2_blocks_per_mb)
static int decode_slice_thread (AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
static int decode_picture (AVCodecContext *avctx)
static int decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
static av_cold int decode_close (AVCodecContext *avctx)

Variables

static const uint8_t progressive_scan [64]
static const uint8_t interlaced_scan [64]
static const uint8_t dc_codebook [7] = { 0x04, 0x28, 0x28, 0x4D, 0x4D, 0x70, 0x70}
static const uint8_t run_to_cb [16] = { 0x06, 0x06, 0x05, 0x05, 0x04, 0x29, 0x29, 0x29, 0x29, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x4C }
static const uint8_t lev_to_cb [10] = { 0x04, 0x0A, 0x05, 0x06, 0x04, 0x28, 0x28, 0x28, 0x28, 0x4C }
AVCodec ff_prores_decoder

Detailed Description

Known FOURCCs: 'apch' (HQ), 'apcn' (SD), 'apcs' (LT), 'acpo' (Proxy), 'ap4h' (4444).

Definition in file proresdec2.c.

Define Documentation

#define DECODE_CODEWORD ( val,
codebook   ) 

Value:

do {                                                                \
        unsigned int rice_order, exp_order, switch_bits;                \
        unsigned int q, buf, bits;                                      \
                                                                        \
        UPDATE_CACHE(re, gb);                                           \
        buf = GET_CACHE(re, gb);                                        \
                                                                        \
        /* number of bits to switch between rice and exp golomb */      \
        switch_bits =  codebook & 3;                                    \
        rice_order  =  codebook >> 5;                                   \
        exp_order   = (codebook >> 2) & 7;                              \
                                                                        \
        q = 31 - av_log2(buf);                                          \
                                                                        \
        if (q > switch_bits) { /* exp golomb */                         \
            bits = exp_order - switch_bits + (q<<1);                    \
            val = SHOW_UBITS(re, gb, bits) - (1 << exp_order) +         \
                ((switch_bits + 1) << rice_order);                      \
            SKIP_BITS(re, gb, bits);                                    \
        } else if (rice_order) {                                        \
            SKIP_BITS(re, gb, q+1);                                     \
            val = (q << rice_order) + SHOW_UBITS(re, gb, rice_order);   \
            SKIP_BITS(re, gb, rice_order);                              \
        } else {                                                        \
            val = q;                                                    \
            SKIP_BITS(re, gb, q+1);                                     \
        }                                                               \
    } while (0)

Definition at line 252 of file proresdec2.c.

Referenced by decode_ac_coeffs(), and decode_dc_coeffs().

#define FIRST_DC_CB   0xB8

Definition at line 284 of file proresdec2.c.

Referenced by decode_dc_coeffs(), and encode_dc_coeffs().

#define LONG_BITSTREAM_READER

Definition at line 29 of file proresdec2.c.

#define TOSIGNED ( x   )     (((x) >> 1) ^ (-((x) & 1)))

Definition at line 282 of file proresdec2.c.

Referenced by decode_dc_coeffs().

Function Documentation

static av_always_inline void decode_ac_coeffs ( AVCodecContext *  avctx,
GetBitContext *  gb,
DCTELEM *  out,
int  blocks_per_slice 
) [static]

Definition at line 318 of file proresdec2.c.

Referenced by decode_slice_chroma(), decode_slice_luma(), and decode_slice_plane().

static av_cold int decode_close ( AVCodecContext *  avctx  )  [static]

Definition at line 572 of file proresdec2.c.

static av_always_inline void decode_dc_coeffs ( GetBitContext *  gb,
DCTELEM *  out,
int  blocks_per_slice 
) [static]

Definition at line 288 of file proresdec2.c.

Referenced by decode_slice_chroma(), decode_slice_luma(), and decode_slice_plane().

static int decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  data_size,
AVPacket *  avpkt 
) [static]

Definition at line 514 of file proresdec2.c.

static int decode_frame_header ( ProresContext *  ctx,
const uint8_t *  buf,
const int  data_size,
AVCodecContext *  avctx 
) [static]

Definition at line 88 of file proresdec2.c.

Referenced by decode_frame(), and vp8_decode_frame().

static av_cold int decode_init ( AVCodecContext *  avctx  )  [static]

Definition at line 65 of file proresdec2.c.

static int decode_picture ( AVCodecContext *  avctx  )  [static]

Definition at line 500 of file proresdec2.c.

Referenced by decode_frame().

static int decode_picture_header ( AVCodecContext *  avctx,
const uint8_t *  buf,
const int  buf_size 
) [static]

Definition at line 151 of file proresdec2.c.

Referenced by decode_frame().

static void decode_slice_chroma ( AVCodecContext *  avctx,
SliceContext *  slice,
uint8_t *  dst,
int  dst_stride,
const uint8_t *  buf,
unsigned  buf_size,
const int16_t *  qmat,
int  log2_blocks_per_mb 
) [static]

Definition at line 390 of file proresdec2.c.

Referenced by decode_slice_thread().

static void decode_slice_luma ( AVCodecContext *  avctx,
SliceContext *  slice,
uint8_t *  dst,
int  dst_stride,
const uint8_t *  buf,
unsigned  buf_size,
const int16_t *  qmat 
) [static]

Definition at line 360 of file proresdec2.c.

Referenced by decode_slice_thread().

static int decode_slice_thread ( AVCodecContext *  avctx,
void *  arg,
int  jobnr,
int  threadnr 
) [static]

Definition at line 420 of file proresdec2.c.

Referenced by decode_picture().

static void permute ( uint8_t *  dst,
const uint8_t *  src,
const uint8_t  permutation[64] 
) [static]

Definition at line 36 of file proresdec2.c.

Variable Documentation

const uint8_t dc_codebook[7] = { 0x04, 0x28, 0x28, 0x4D, 0x4D, 0x70, 0x70} [static]

Definition at line 286 of file proresdec2.c.

Referenced by decode_dc_coeffs(), and encode_dc_coeffs().

AVCodec ff_prores_decoder

Initial value:

 {
    .name           = "prores",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = CODEC_ID_PRORES,
    .priv_data_size = sizeof(ProresContext),
    .init           = decode_init,
    .close          = decode_close,
    .decode         = decode_frame,
    .long_name      = NULL_IF_CONFIG_SMALL("ProRes"),
    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS,
}

Definition at line 584 of file proresdec2.c.

const uint8_t interlaced_scan[64] [static]

Initial value:

 {
     0,  8,  1,  9, 16, 24, 17, 25,
     2, 10,  3, 11, 18, 26, 19, 27,
    32, 40, 33, 34, 41, 48, 56, 49,
    42, 35, 43, 50, 57, 58, 51, 59,
     4, 12,  5,  6, 13, 20, 28, 21,
    14,  7, 15, 22, 29, 36, 44, 37,
    30, 23, 31, 38, 45, 52, 60, 53,
    46, 39, 47, 54, 61, 62, 55, 63,
}

Definition at line 54 of file proresdec2.c.

Referenced by decode_frame_header(), and decode_init().

const uint8_t lev_to_cb[10] = { 0x04, 0x0A, 0x05, 0x06, 0x04, 0x28, 0x28, 0x28, 0x28, 0x4C } [static]

Definition at line 316 of file proresdec2.c.

Referenced by decode_ac_coeffs(), and encode_ac_coeffs().

const uint8_t progressive_scan[64] [static]

Initial value:

 {
     0,  1,  8,  9,  2,  3, 10, 11,
    16, 17, 24, 25, 18, 19, 26, 27,
     4,  5, 12, 20, 13,  6,  7, 14,
    21, 28, 29, 22, 15, 23, 30, 31,
    32, 33, 40, 48, 41, 34, 35, 42,
    49, 56, 57, 50, 43, 36, 37, 44,
    51, 58, 59, 52, 45, 38, 39, 46,
    53, 60, 61, 54, 47, 55, 62, 63
}

Definition at line 43 of file proresdec2.c.

Referenced by decode_frame_header(), decode_init(), and encode_ac_coeffs().

const uint8_t run_to_cb[16] = { 0x06, 0x06, 0x05, 0x05, 0x04, 0x29, 0x29, 0x29, 0x29, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x4C } [static]

Definition at line 315 of file proresdec2.c.

Referenced by decode_ac_coeffs(), and encode_ac_coeffs().

Generated on Fri Oct 26 02:46:09 2012 for FFmpeg by  doxygen 1.5.8