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 "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 FIRST_DC_CB   0xB8

#define FRAME_ID   MKBETAG('i', 'c', 'p', 'f')

#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, uint8_t 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)

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

static const uint8_t progressive_scan [64]

static const uint8_t interlaced_scan [64]

static uint8_t dc_codebook [4]

static uint8_t ac_codebook [7]

static uint8_t run_to_cb_index [16]

Lookup tables for adaptive switching between codebooks according with previous run/level value.

static uint8_t lev_to_cb_index [10] = { 0, 6, 3, 5, 0, 1, 1, 1, 1, 2 }

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 FIRST_DC_CB 0xB8

Definition at line 354 of file proresdec_lgpl.c.

#define FRAME_ID MKBETAG('i', 'c', 'p', 'f')

Definition at line 631 of file proresdec_lgpl.c.

Referenced by decode_frame().

#define LONG_BITSTREAM_READER

Definition at line 31 of file proresdec_lgpl.c.

#define LSB2SIGN ( x ) (-((x) & 1))

Definition at line 351 of file proresdec_lgpl.c.

#define MOVE_DATA_PTR ( nbytes ) buf += (nbytes); buf_size -= (nbytes)

Definition at line 632 of file proresdec_lgpl.c.

Referenced by decode_frame().

#define TOSIGNED ( x ) (((x) >> 1) ^ LSB2SIGN(x))

Definition at line 352 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 415 of file proresdec_lgpl.c.

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

Definition at line 683 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 367 of file proresdec_lgpl.c.

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

Definition at line 634 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 125 of file proresdec_lgpl.c.

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

Definition at line 101 of file proresdec_lgpl.c.

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

Definition at line 600 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 231 of file proresdec_lgpl.c.

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

Definition at line 502 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
	)			`[static]`

Decode a slice plane (luma or chroma).

Definition at line 460 of file proresdec_lgpl.c.

Referenced by decode_slice().

static int decode_vlc_codeword	(	GetBitContext *	gb,
		uint8_t	codebook
	)			`[inline, static]`

Read an unsigned rice/exp golomb codeword.

Definition at line 313 of file proresdec_lgpl.c.

Referenced by decode_ac_coeffs(), and decode_dc_coeffs().

Variable Documentation

uint8_t ac_codebook[7] [static]

Initial value:

 {
    0x04, 
    0x28, 
    0x4C, 
    0x05, 
    0x29, 
    0x06, 
    0x0A, 
}

Definition at line 392 of file proresdec_lgpl.c.

Referenced by decode_ac_coeffs().

uint8_t dc_codebook[4] [static]

Initial value:

 {
    0x04, 
    0x28, 
    0x4D, 
    0x70  
}

Definition at line 356 of file proresdec_lgpl.c.

AVCodec ff_prores_lgpl_decoder

Initial value:

 {
    .name           = "prores_lgpl",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = 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 696 of file proresdec_lgpl.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 89 of file proresdec_lgpl.c.

uint8_t lev_to_cb_index[10] = { 0, 6, 3, 5, 0, 1, 1, 1, 1, 2 } [static]

Definition at line 409 of file proresdec_lgpl.c.

Referenced by decode_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 78 of file proresdec_lgpl.c.

uint8_t run_to_cb_index[16] [static]

Initial value:

    { 5, 5, 3, 3, 0, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 2 }

Lookup tables for adaptive switching between codebooks according with previous run/level value.

Definition at line 406 of file proresdec_lgpl.c.

Referenced by decode_ac_coeffs().


Data Structures
struct	ProresThreadData
struct	ProresContext
Defines
#define	LONG_BITSTREAM_READER
#define	LSB2SIGN(x) (-((x) & 1))
#define	TOSIGNED(x) (((x) >> 1) ^ LSB2SIGN(x))
#define	FIRST_DC_CB 0xB8
#define	FRAME_ID MKBETAG('i', 'c', 'p', 'f')
#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, uint8_t 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)
	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
static const uint8_t	progressive_scan [64]
static const uint8_t	interlaced_scan [64]
static uint8_t	dc_codebook [4]
static uint8_t	ac_codebook [7]
static uint8_t	run_to_cb_index [16]
	Lookup tables for adaptive switching between codebooks according with previous run/level value.
static uint8_t	lev_to_cb_index [10] = { 0, 6, 3, 5, 0, 1, 1, 1, 1, 2 }
AVCodec	ff_prores_lgpl_decoder