proresdec_lgpl.c File Reference

This is a decoder for Apple ProRes 422 SD/HQ/LT/Proxy and ProRes 4444. More...

#include <stdint.h>
#include "libavutil/intmath.h"
#include "avcodec.h"
#include "idctdsp.h"
#include "internal.h"
#include "proresdata.h"
#include "proresdsp.h"
#include "get_bits.h"

Go to the source code of this file.

Data Structures
struct	ProresThreadData
struct	ProresContext

Macros
#define	LONG_BITSTREAM_READER
#define	LSB2SIGN(x)   (-((x) & 1))
#define	TOSIGNED(x)   (((x) >> 1) ^ LSB2SIGN(x))
#define	MAX_PADDING   16
#define	MOVE_DATA_PTR(nbytes)   buf += (nbytes); buf_size -= (nbytes)

Functions
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 (ProresContext *ctx, const uint8_t *buf, const int data_size, AVCodecContext *avctx)
static int	decode_vlc_codeword (GetBitContext *gb, unsigned codebook)
	Read an unsigned rice/exp golomb codeword. More...
static void	decode_dc_coeffs (GetBitContext *gb, int16_t *out, int nblocks)
	Decode DC coefficients for all blocks in a slice. More...
static int	decode_ac_coeffs (GetBitContext *gb, int16_t *out, int blocks_per_slice, int plane_size_factor, const uint8_t *scan)
	Decode AC coefficients for all blocks in a slice. More...
static int	decode_slice_plane (ProresContext *ctx, ProresThreadData *td, const uint8_t *buf, int data_size, uint16_t *out_ptr, int linesize, int mbs_per_slice, int blocks_per_mb, int plane_size_factor, const int16_t *qmat, int is_chroma)
	Decode a slice plane (luma or chroma). More...
static void	unpack_alpha (GetBitContext *gb, uint16_t *dst, int num_coeffs, const int num_bits)
static void	decode_alpha_plane (ProresContext *ctx, ProresThreadData *td, const uint8_t *buf, int data_size, uint16_t *out_ptr, int linesize, int mbs_per_slice)
	Decode alpha slice plane. More...
static int	decode_slice (AVCodecContext *avctx, void *tdata)
static int	decode_picture (ProresContext *ctx, int pic_num, AVCodecContext *avctx)
static int	decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	decode_close (AVCodecContext *avctx)

Variables
AVCodec	ff_prores_lgpl_decoder

Detailed Description

This is a decoder for Apple ProRes 422 SD/HQ/LT/Proxy and ProRes 4444.

It is used for storing and editing high definition video data in Apple's Final Cut Pro.

See also

http://wiki.multimedia.cx/index.php?title=Apple_ProRes

Definition in file proresdec_lgpl.c.

Macro Definition Documentation

LONG_BITSTREAM_READER

#define LONG_BITSTREAM_READER

Definition at line 31 of file proresdec_lgpl.c.

LSB2SIGN

#define LSB2SIGN

(

x

)

(-((x) & 1))

Definition at line 340 of file proresdec_lgpl.c.

TOSIGNED

#define TOSIGNED

(

x

)

(((x) >> 1) ^ LSB2SIGN(x))

Definition at line 341 of file proresdec_lgpl.c.

Referenced by decode_dc_coeffs().

MAX_PADDING

#define MAX_PADDING   16

Definition at line 370 of file proresdec_lgpl.c.

Referenced by decode_ac_coeffs().

MOVE_DATA_PTR

#define MOVE_DATA_PTR

(

nbytes

)

buf += (nbytes); buf_size -= (nbytes)

Definition at line 715 of file proresdec_lgpl.c.

Referenced by decode_frame().

Function Documentation

decode_init()

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 81 of file proresdec_lgpl.c.

decode_frame_header()

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

static

Definition at line 99 of file proresdec_lgpl.c.

Referenced by decode_frame().

decode_picture_header()

static int decode_picture_header ( ProresContext *  ctx, const uint8_t *  buf, const int  data_size, AVCodecContext *  avctx  )

static

Definition at line 218 of file proresdec_lgpl.c.

Referenced by decode_frame().

decode_vlc_codeword()

static int decode_vlc_codeword ( GetBitContext *  gb, unsigned  codebook  )

inlinestatic

Read an unsigned rice/exp golomb codeword.

Definition at line 302 of file proresdec_lgpl.c.

Referenced by decode_ac_coeffs(), and decode_dc_coeffs().

decode_dc_coeffs()

static void decode_dc_coeffs ( GetBitContext *  gb, int16_t *  out, int  nblocks  )

inlinestatic

Decode DC coefficients for all blocks in a slice.

Definition at line 346 of file proresdec_lgpl.c.

Referenced by decode_slice_plane().

decode_ac_coeffs()

static int decode_ac_coeffs ( GetBitContext *  gb, int16_t *  out, int  blocks_per_slice, int  plane_size_factor, const uint8_t *  scan  )

inlinestatic

Decode AC coefficients for all blocks in a slice.

Definition at line 375 of file proresdec_lgpl.c.

Referenced by decode_slice_plane().

decode_slice_plane()

static int decode_slice_plane ( ProresContext *  ctx, ProresThreadData *  td, const uint8_t *  buf, int  data_size, uint16_t *  out_ptr, int  linesize, int  mbs_per_slice, int  blocks_per_mb, int  plane_size_factor, const int16_t *  qmat, int  is_chroma  )

static

Decode a slice plane (luma or chroma).

Definition at line 426 of file proresdec_lgpl.c.

Referenced by decode_slice().

unpack_alpha()

static void unpack_alpha ( GetBitContext *  gb, uint16_t *  dst, int  num_coeffs, const int  num_bits  )

static

Definition at line 486 of file proresdec_lgpl.c.

Referenced by decode_alpha_plane().

decode_alpha_plane()

static void decode_alpha_plane ( ProresContext *  ctx, ProresThreadData *  td, const uint8_t *  buf, int  data_size, uint16_t *  out_ptr, int  linesize, int  mbs_per_slice  )

static

Decode alpha slice plane.

Definition at line 532 of file proresdec_lgpl.c.

Referenced by decode_slice().

decode_slice()

static int decode_slice ( AVCodecContext *  avctx, void *  tdata  )

static

Definition at line 559 of file proresdec_lgpl.c.

Referenced by decode_picture().

decode_picture()

static int decode_picture ( ProresContext *  ctx, int  pic_num, AVCodecContext *  avctx  )

static

Definition at line 684 of file proresdec_lgpl.c.

Referenced by decode_frame().

decode_frame()

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

static

Definition at line 717 of file proresdec_lgpl.c.

decode_close()

static av_cold int decode_close ( AVCodecContext *  avctx )

static

Definition at line 765 of file proresdec_lgpl.c.

Variable Documentation

ff_prores_lgpl_decoder

AVCodec ff_prores_lgpl_decoder

Initial value:

= {
    .name           = "prores_lgpl",
    .long_name      = NULL_IF_CONFIG_SMALL("Apple ProRes (iCodec Pro)"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_PRORES,
    .priv_data_size = sizeof(ProresContext),
    .init           = decode_init,
    .close          = decode_close,
    .decode         = decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS,
}

Definition at line 775 of file proresdec_lgpl.c.