libavcodec/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 "proresdata.h"
#include "proresdsp.h"
#include "get_bits.h"

Go to the source code of this file.

Data Structures
struct	ProresThreadData
struct	ProresContext
Defines
#define	LONG_BITSTREAM_READER
#define	LSB2SIGN(x)   (-((x) & 1))
#define	TOSIGNED(x)   (((x) >> 1) ^ LSB2SIGN(x))
#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.
static void	decode_dc_coeffs (GetBitContext *gb, DCTELEM *out, int nblocks)
	Decode DC coefficients for all blocks in a slice.
static void	decode_ac_coeffs (GetBitContext *gb, DCTELEM *out, int blocks_per_slice, int plane_size_factor, const uint8_t *scan)
	Decode AC coefficients for all blocks in a slice.
static void	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).
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 *data_size, 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.

---

Define Documentation

#define LONG_BITSTREAM_READER

Definition at line 31 of file proresdec_lgpl.c.

#define LSB2SIGN

(

x

)

(-((x) & 1))

Definition at line 334 of file proresdec_lgpl.c.

#define MOVE_DATA_PTR

(

nbytes

)

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

Definition at line 599 of file proresdec_lgpl.c.

Referenced by decode_frame().

#define TOSIGNED

(

x

)

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

Definition at line 335 of file proresdec_lgpl.c.

---

Function Documentation

static void decode_ac_coeffs	(	GetBitContext *	gb,
		DCTELEM *	out,
		int	blocks_per_slice,
		int	plane_size_factor,
		const uint8_t *	scan
	)			[inline, static]

Decode AC coefficients for all blocks in a slice.

Definition at line 368 of file proresdec_lgpl.c.

static av_cold int decode_close

(

AVCodecContext *

avctx

)

[static]

Definition at line 650 of file proresdec_lgpl.c.

static void decode_dc_coeffs	(	GetBitContext *	gb,
		DCTELEM *	out,
		int	nblocks
	)			[inline, static]

Decode DC coefficients for all blocks in a slice.

Definition at line 340 of file proresdec_lgpl.c.

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

Definition at line 601 of file proresdec_lgpl.c.

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

Definition at line 102 of file proresdec_lgpl.c.

static av_cold int decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 79 of file proresdec_lgpl.c.

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

Definition at line 568 of file proresdec_lgpl.c.

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

Definition at line 212 of file proresdec_lgpl.c.

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

Definition at line 470 of file proresdec_lgpl.c.

static void 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 413 of file proresdec_lgpl.c.

Referenced by decode_slice().

static int decode_vlc_codeword	(	GetBitContext *	gb,
		unsigned	codebook
	)			[inline, static]

Read an unsigned rice/exp golomb codeword.

Definition at line 296 of file proresdec_lgpl.c.

Referenced by decode_ac_coeffs(), and decode_dc_coeffs().

---

Variable Documentation

AVCodec ff_prores_lgpl_decoder

Initial value:

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

Definition at line 663 of file proresdec_lgpl.c.