utvideodec.c File Reference

Ut Video decoder. More...

#include <inttypes.h>
#include <stdlib.h>
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "bswapdsp.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "get_bits.h"
#include "lossless_videodsp.h"
#include "thread.h"
#include "utvideo.h"
#include "utvideodsp.h"

Go to the source code of this file.

Data Structures
struct	UtvideoContext
struct	HuffEntry

Macros
#define	CACHED_BITSTREAM_READER   !ARCH_X86_32
#define	UNCHECKED_BITSTREAM_READER   1
#define	VLC_BITS   11
#define	READ_PLANE(b, end)

Functions
static int	build_huff (UtvideoContext *c, const uint8_t *src, VLC *vlc, VLC_MULTI *multi, int *fsym, unsigned nb_elems)
static int	decode_plane10 (UtvideoContext *c, int plane_no, uint16_t *dst, ptrdiff_t stride, int width, int height, const uint8_t *src, const uint8_t *huff, int use_pred)
static int	compute_cmask (int plane_no, int interlaced, enum AVPixelFormat pix_fmt)
static int	decode_plane (UtvideoContext *c, int plane_no, uint8_t *dst, ptrdiff_t stride, int width, int height, const uint8_t *src, int use_pred)
static void	restore_median_planar (UtvideoContext *c, uint8_t *src, ptrdiff_t stride, int width, int height, int slices, int rmode)
static void	restore_median_planar_il (UtvideoContext *c, uint8_t *src, ptrdiff_t stride, int width, int height, int slices, int rmode)
static void	restore_gradient_planar (UtvideoContext *c, uint8_t *src, ptrdiff_t stride, int width, int height, int slices, int rmode)
static void	restore_gradient_planar_il (UtvideoContext *c, uint8_t *src, ptrdiff_t stride, int width, int height, int slices, int rmode)
static int	decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
static av_cold int	decode_init (AVCodecContext *avctx)
static av_cold int	decode_end (AVCodecContext *avctx)

Variables
const FFCodec	ff_utvideo_decoder

Detailed Description

Ut Video decoder.

Definition in file utvideodec.c.

Macro Definition Documentation

CACHED_BITSTREAM_READER

#define CACHED_BITSTREAM_READER   !ARCH_X86_32

Definition at line 30 of file utvideodec.c.

UNCHECKED_BITSTREAM_READER

#define UNCHECKED_BITSTREAM_READER   1

Definition at line 31 of file utvideodec.c.

VLC_BITS

#define VLC_BITS   11

READ_PLANE

#define READ_PLANE	(		b,
			end )

Value:

{ \
    buf = !use_pred ? dest : c->buffer; \
    i = 0; \
    for (; CACHED_BITSTREAM_READER && i < width-end && get_bits_left(&gb) > 0;) {\
        ret = get_vlc_multi(&gb, (uint8_t *)buf + i * b, multi.table, \
                            vlc.table, VLC_BITS, 3, b); \
        if (ret > 0) \
            i += ret; \
        if (ret <= 0) \
            goto fail; \
    } \
    for (; i < width && get_bits_left(&gb) > 0; i++) \
        buf[i] = get_vlc2(&gb, vlc.table, VLC_BITS, 3); \
    if (use_pred) { \
        if (b == 2) \
            c->llviddsp.add_left_pred_int16((uint16_t *)dest, (const uint16_t *)buf, 0x3ff, width, prev); \
        else \
            c->llviddsp.add_left_pred((uint8_t *)dest, (const uint8_t *)buf, width, prev); \
    } \
    prev = dest[width-1]; \
    dest += stride; \
}

Definition at line 117 of file utvideodec.c.

Referenced by decode_plane(), and decode_plane10().

Function Documentation

build_huff()

static int build_huff ( UtvideoContext * c, const uint8_t * src, VLC * vlc, VLC_MULTI * multi, int * fsym, unsigned nb_elems )

static

Definition at line 76 of file utvideodec.c.

Referenced by decode_plane(), and decode_plane10().

decode_plane10()

static int decode_plane10 ( UtvideoContext * c, int plane_no, uint16_t * dst, ptrdiff_t stride, int width, int height, const uint8_t * src, const uint8_t * huff, int use_pred )

static

Definition at line 141 of file utvideodec.c.

Referenced by decode_frame().

compute_cmask()

static int compute_cmask ( int plane_no, int interlaced, enum AVPixelFormat pix_fmt )

static

Definition at line 228 of file utvideodec.c.

Referenced by decode_plane().

decode_plane()

static int decode_plane ( UtvideoContext * c, int plane_no, uint8_t * dst, ptrdiff_t stride, int width, int height, const uint8_t * src, int use_pred )

static

Definition at line 238 of file utvideodec.c.

Referenced by decode_frame().

restore_median_planar()

static void restore_median_planar ( UtvideoContext * c, uint8_t * src, ptrdiff_t stride, int width, int height, int slices, int rmode )

static

Definition at line 377 of file utvideodec.c.

Referenced by decode_frame().

restore_median_planar_il()

static void restore_median_planar_il ( UtvideoContext * c, uint8_t * src, ptrdiff_t stride, int width, int height, int slices, int rmode )

static

Definition at line 429 of file utvideodec.c.

Referenced by decode_frame().

restore_gradient_planar()

static void restore_gradient_planar ( UtvideoContext * c, uint8_t * src, ptrdiff_t stride, int width, int height, int slices, int rmode )

static

Definition at line 484 of file utvideodec.c.

Referenced by decode_frame().

restore_gradient_planar_il()

static void restore_gradient_planar_il ( UtvideoContext * c, uint8_t * src, ptrdiff_t stride, int width, int height, int slices, int rmode )

static

Definition at line 525 of file utvideodec.c.

Referenced by decode_frame().

decode_frame()

static int decode_frame ( AVCodecContext * avctx, AVFrame * frame, int * got_frame, AVPacket * avpkt )

static

Definition at line 580 of file utvideodec.c.

decode_init()

static av_cold int decode_init ( AVCodecContext * avctx )

static

Definition at line 901 of file utvideodec.c.

decode_end()

static av_cold int decode_end ( AVCodecContext * avctx )

static

Definition at line 1067 of file utvideodec.c.

Variable Documentation

ff_utvideo_decoder

const FFCodec ff_utvideo_decoder

Initial value:

= {
    .p.name         = "utvideo",
    CODEC_LONG_NAME("Ut Video"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_UTVIDEO,
    .priv_data_size = sizeof(UtvideoContext),
    .init           = decode_init,
    .close          = decode_end,
    FF_CODEC_DECODE_CB(decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
}

Definition at line 1077 of file utvideodec.c.