h264_ps.c File Reference

H.264 / AVC / MPEG-4 part10 parameter set decoding. More...

#include <inttypes.h>
#include "libavutil/imgutils.h"
#include "internal.h"
#include "mathops.h"
#include "avcodec.h"
#include "h264data.h"
#include "h264_ps.h"
#include "golomb.h"

Go to the source code of this file.

Macros
#define	MAX_LOG2_MAX_FRAME_NUM   (12 + 4)
#define	MIN_LOG2_MAX_FRAME_NUM   4
#define	EXTENDED_SAR   255

Functions
static void	remove_pps (H264ParamSets *s, int id)
static void	remove_sps (H264ParamSets *s, int id)
static int	decode_hrd_parameters (GetBitContext *gb, AVCodecContext *avctx, SPS *sps)
static int	decode_vui_parameters (GetBitContext *gb, AVCodecContext *avctx, SPS *sps)
static void	decode_scaling_list (GetBitContext *gb, uint8_t *factors, int size, const uint8_t *jvt_list, const uint8_t *fallback_list)
static int	decode_scaling_matrices (GetBitContext *gb, const SPS *sps, const PPS *pps, int is_sps, uint8_t(*scaling_matrix4)[16], uint8_t(*scaling_matrix8)[64])
void	ff_h264_ps_uninit (H264ParamSets *ps)
	Uninit H264 param sets structure. More...
int	ff_h264_decode_seq_parameter_set (GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
	Decode SPS. More...
static void	init_dequant8_coeff_table (PPS *pps, const SPS *sps)
static void	init_dequant4_coeff_table (PPS *pps, const SPS *sps)
static void	init_dequant_tables (PPS *pps, const SPS *sps)
static void	build_qp_table (PPS *pps, int t, int index, const int depth)
static int	more_rbsp_data_in_pps (const SPS *sps, void *logctx)
int	ff_h264_decode_picture_parameter_set (GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
	Decode PPS. More...

Variables
static const uint8_t	default_scaling4 [2][16]
static const uint8_t	default_scaling8 [2][64]
static const int	level_max_dpb_mbs [][2]

Detailed Description

H.264 / AVC / MPEG-4 part10 parameter set decoding.

Author

Michael Niedermayer micha.nosp@m.elni.nosp@m.@gmx..nosp@m.at

Definition in file h264_ps.c.

Macro Definition Documentation

#define MAX_LOG2_MAX_FRAME_NUM   (12 + 4)

Definition at line 38 of file h264_ps.c.

Referenced by ff_h264_decode_seq_parameter_set().

#define MIN_LOG2_MAX_FRAME_NUM   4

Definition at line 39 of file h264_ps.c.

Referenced by ff_h264_decode_seq_parameter_set().

#define EXTENDED_SAR   255

Definition at line 41 of file h264_ps.c.

Referenced by decode_vui_parameters().

Function Documentation

static void remove_pps ( H264ParamSets *  s, int  id  )

static

Definition at line 89 of file h264_ps.c.

Referenced by ff_h264_decode_picture_parameter_set(), and remove_sps().

static void remove_sps ( H264ParamSets *  s, int  id  )

static

Definition at line 94 of file h264_ps.c.

Referenced by ff_h264_decode_seq_parameter_set().

static int decode_hrd_parameters ( GetBitContext *  gb, AVCodecContext *  avctx, SPS *  sps  )

inlinestatic

Definition at line 108 of file h264_ps.c.

Referenced by decode_vui_parameters().

static int decode_vui_parameters ( GetBitContext *  gb, AVCodecContext *  avctx, SPS *  sps  )

inlinestatic

Definition at line 134 of file h264_ps.c.

Referenced by ff_h264_decode_seq_parameter_set().

static void decode_scaling_list ( GetBitContext *  gb, uint8_t *  factors, int  size, const uint8_t *  jvt_list, const uint8_t *  fallback_list  )

static

Definition at line 250 of file h264_ps.c.

Referenced by decode_scaling_matrices().

static int decode_scaling_matrices ( GetBitContext *  gb, const SPS *  sps, const PPS *  pps, int  is_sps, uint8_t(*)  scaling_matrix4[16], uint8_t(*)  scaling_matrix8[64]  )

static

Definition at line 271 of file h264_ps.c.

Referenced by ff_h264_decode_picture_parameter_set(), and ff_h264_decode_seq_parameter_set().

void ff_h264_ps_uninit

(

H264ParamSets *

ps

)

Uninit H264 param sets structure.

Definition at line 307 of file h264_ps.c.

Referenced by h264_close(), and h264_decode_end().

int ff_h264_decode_seq_parameter_set	(	GetBitContext *	gb,
		AVCodecContext *	avctx,
		H264ParamSets *	ps,
		int	ignore_truncation
	)

Decode SPS.

Definition at line 324 of file h264_ps.c.

Referenced by decode_extradata_ps(), decode_nal_units(), and parse_nal_units().

static void init_dequant8_coeff_table ( PPS *  pps, const SPS *  sps  )

static

Definition at line 618 of file h264_ps.c.

Referenced by init_dequant_tables().

static void init_dequant4_coeff_table ( PPS *  pps, const SPS *  sps  )

static

Definition at line 645 of file h264_ps.c.

Referenced by init_dequant_tables().

static void init_dequant_tables ( PPS *  pps, const SPS *  sps  )

static

Definition at line 671 of file h264_ps.c.

Referenced by ff_h264_decode_picture_parameter_set().

static void build_qp_table ( PPS *  pps, int  t, int  index, const int  depth  )

static

Definition at line 690 of file h264_ps.c.

Referenced by ff_h264_decode_picture_parameter_set().

static int more_rbsp_data_in_pps ( const SPS *  sps, void *  logctx  )

static

Definition at line 699 of file h264_ps.c.

Referenced by ff_h264_decode_picture_parameter_set().

int ff_h264_decode_picture_parameter_set	(	GetBitContext *	gb,
		AVCodecContext *	avctx,
		H264ParamSets *	ps,
		int	bit_length
	)

Decode PPS.

Definition at line 713 of file h264_ps.c.

Referenced by decode_extradata_ps(), decode_nal_units(), and parse_nal_units().

Variable Documentation

const uint8_t default_scaling4[2][16]

static

Initial value:

= {
    {  6, 13, 20, 28, 13, 20, 28, 32,
      20, 28, 32, 37, 28, 32, 37, 42 },
    { 10, 14, 20, 24, 14, 20, 24, 27,
      20, 24, 27, 30, 24, 27, 30, 34 }
}

Definition at line 43 of file h264_ps.c.

Referenced by decode_scaling_matrices().

const uint8_t default_scaling8[2][64]

static

Initial value:

= {
    {  6, 10, 13, 16, 18, 23, 25, 27,
      10, 11, 16, 18, 23, 25, 27, 29,
      13, 16, 18, 23, 25, 27, 29, 31,
      16, 18, 23, 25, 27, 29, 31, 33,
      18, 23, 25, 27, 29, 31, 33, 36,
      23, 25, 27, 29, 31, 33, 36, 38,
      25, 27, 29, 31, 33, 36, 38, 40,
      27, 29, 31, 33, 36, 38, 40, 42 },
    {  9, 13, 15, 17, 19, 21, 22, 24,
      13, 13, 17, 19, 21, 22, 24, 25,
      15, 17, 19, 21, 22, 24, 25, 27,
      17, 19, 21, 22, 24, 25, 27, 28,
      19, 21, 22, 24, 25, 27, 28, 30,
      21, 22, 24, 25, 27, 28, 30, 32,
      22, 24, 25, 27, 28, 30, 32, 33,
      24, 25, 27, 28, 30, 32, 33, 35 }
}

Definition at line 50 of file h264_ps.c.

Referenced by decode_scaling_matrices().

const int level_max_dpb_mbs[][2]

static

Initial value:

= {
    { 10, 396       },
    { 11, 900       },
    { 12, 2376      },
    { 13, 2376      },
    { 20, 2376      },
    { 21, 4752      },
    { 22, 8100      },
    { 30, 8100      },
    { 31, 18000     },
    { 32, 20480     },
    { 40, 32768     },
    { 41, 32768     },
    { 42, 34816     },
    { 50, 110400    },
    { 51, 184320    },
    { 52, 184320    },
}

Definition at line 70 of file h264_ps.c.

Referenced by ff_h264_decode_seq_parameter_set().