hevc.c File Reference

#include "libavcodec/avcodec.h"
#include "libavcodec/get_bits.h"
#include "libavcodec/golomb.h"
#include "libavcodec/hevc.h"
#include "libavutil/intreadwrite.h"
#include "avc.h"
#include "avio.h"
#include "hevc.h"

Go to the source code of this file.

Data Structures
struct	HVCCNALUnitArray
struct	HEVCDecoderConfigurationRecord
struct	HVCCProfileTierLevel

Macros
#define	MAX_SPATIAL_SEGMENTATION   4096

Functions
static void	hvcc_update_ptl (HEVCDecoderConfigurationRecord *hvcc, HVCCProfileTierLevel *ptl)
static void	hvcc_parse_ptl (GetBitContext *gb, HEVCDecoderConfigurationRecord *hvcc, unsigned int max_sub_layers_minus1)
static void	skip_sub_layer_hrd_parameters (GetBitContext *gb, unsigned int cpb_cnt_minus1, uint8_t sub_pic_hrd_params_present_flag)
static int	skip_hrd_parameters (GetBitContext *gb, uint8_t cprms_present_flag, unsigned int max_sub_layers_minus1)
static void	skip_timing_info (GetBitContext *gb)
static void	hvcc_parse_vui (GetBitContext *gb, HEVCDecoderConfigurationRecord *hvcc, unsigned int max_sub_layers_minus1)
static void	skip_sub_layer_ordering_info (GetBitContext *gb)
static int	hvcc_parse_vps (GetBitContext *gb, HEVCDecoderConfigurationRecord *hvcc)
static void	skip_scaling_list_data (GetBitContext *gb)
static int	parse_rps (GetBitContext *gb, unsigned int rps_idx, unsigned int num_rps, unsigned int num_delta_pocs[HEVC_MAX_SHORT_TERM_REF_PIC_SETS])
static int	hvcc_parse_sps (GetBitContext *gb, HEVCDecoderConfigurationRecord *hvcc)
static int	hvcc_parse_pps (GetBitContext *gb, HEVCDecoderConfigurationRecord *hvcc)
static void	nal_unit_parse_header (GetBitContext *gb, uint8_t *nal_type)
static int	hvcc_array_add_nal_unit (uint8_t *nal_buf, uint32_t nal_size, uint8_t nal_type, int ps_array_completeness, HEVCDecoderConfigurationRecord *hvcc)
static int	hvcc_add_nal_unit (uint8_t *nal_buf, uint32_t nal_size, int ps_array_completeness, HEVCDecoderConfigurationRecord *hvcc)
static void	hvcc_init (HEVCDecoderConfigurationRecord *hvcc)
static void	hvcc_close (HEVCDecoderConfigurationRecord *hvcc)
static int	hvcc_write (AVIOContext *pb, HEVCDecoderConfigurationRecord *hvcc)
int	ff_hevc_annexb2mp4 (AVIOContext *pb, const uint8_t *buf_in, int size, int filter_ps, int *ps_count)
	Writes Annex B formatted HEVC NAL units to the provided AVIOContext. More...
int	ff_hevc_annexb2mp4_buf (const uint8_t *buf_in, uint8_t **buf_out, int *size, int filter_ps, int *ps_count)
	Writes Annex B formatted HEVC NAL units to a data buffer. More...
int	ff_isom_write_hvcc (AVIOContext *pb, const uint8_t *data, int size, int ps_array_completeness)
	Writes HEVC extradata (parameter sets, declarative SEI NAL units) to the provided AVIOContext. More...

Macro Definition Documentation

MAX_SPATIAL_SEGMENTATION

#define MAX_SPATIAL_SEGMENTATION   4096

Definition at line 30 of file hevc.c.

Function Documentation

hvcc_update_ptl()

static void hvcc_update_ptl ( HEVCDecoderConfigurationRecord *  hvcc, HVCCProfileTierLevel *  ptl  )

static

Definition at line 71 of file hevc.c.

Referenced by hvcc_parse_ptl().

hvcc_parse_ptl()

static void hvcc_parse_ptl ( GetBitContext *  gb, HEVCDecoderConfigurationRecord *  hvcc, unsigned int  max_sub_layers_minus1  )

static

Definition at line 125 of file hevc.c.

Referenced by hvcc_parse_sps(), and hvcc_parse_vps().

skip_sub_layer_hrd_parameters()

static void skip_sub_layer_hrd_parameters ( GetBitContext *  gb, unsigned int  cpb_cnt_minus1, uint8_t  sub_pic_hrd_params_present_flag  )

static

Definition at line 174 of file hevc.c.

Referenced by skip_hrd_parameters().

skip_hrd_parameters()

static int skip_hrd_parameters ( GetBitContext *  gb, uint8_t  cprms_present_flag, unsigned int  max_sub_layers_minus1  )

static

Definition at line 193 of file hevc.c.

Referenced by hvcc_parse_vui().

skip_timing_info()

static void skip_timing_info ( GetBitContext *  gb )

static

Definition at line 268 of file hevc.c.

Referenced by hvcc_parse_vui().

hvcc_parse_vui()

static void hvcc_parse_vui ( GetBitContext *  gb, HEVCDecoderConfigurationRecord *  hvcc, unsigned int  max_sub_layers_minus1  )

static

Definition at line 277 of file hevc.c.

Referenced by hvcc_parse_sps().

skip_sub_layer_ordering_info()

static void skip_sub_layer_ordering_info ( GetBitContext *  gb )

static

Definition at line 355 of file hevc.c.

Referenced by hvcc_parse_sps().

hvcc_parse_vps()

static int hvcc_parse_vps ( GetBitContext *  gb, HEVCDecoderConfigurationRecord *  hvcc  )

static

Definition at line 362 of file hevc.c.

Referenced by hvcc_add_nal_unit().

skip_scaling_list_data()

static void skip_scaling_list_data ( GetBitContext *  gb )

static

Definition at line 399 of file hevc.c.

Referenced by hvcc_parse_sps().

parse_rps()

static int parse_rps ( GetBitContext *  gb, unsigned int  rps_idx, unsigned int  num_rps, unsigned int  num_delta_pocs[HEVC_MAX_SHORT_TERM_REF_PIC_SETS]  )

static

Definition at line 418 of file hevc.c.

Referenced by hvcc_parse_sps().

hvcc_parse_sps()

static int hvcc_parse_sps ( GetBitContext *  gb, HEVCDecoderConfigurationRecord *  hvcc  )

static

Definition at line 485 of file hevc.c.

Referenced by hvcc_add_nal_unit().

hvcc_parse_pps()

static int hvcc_parse_pps ( GetBitContext *  gb, HEVCDecoderConfigurationRecord *  hvcc  )

static

Definition at line 589 of file hevc.c.

Referenced by hvcc_add_nal_unit().

nal_unit_parse_header()

static void nal_unit_parse_header ( GetBitContext *  gb, uint8_t *  nal_type  )

static

Definition at line 646 of file hevc.c.

Referenced by hvcc_add_nal_unit().

hvcc_array_add_nal_unit()

static int hvcc_array_add_nal_unit ( uint8_t *  nal_buf, uint32_t  nal_size, uint8_t  nal_type, int  ps_array_completeness, HEVCDecoderConfigurationRecord *  hvcc  )

static

Definition at line 659 of file hevc.c.

Referenced by hvcc_add_nal_unit().

hvcc_add_nal_unit()

static int hvcc_add_nal_unit ( uint8_t *  nal_buf, uint32_t  nal_size, int  ps_array_completeness, HEVCDecoderConfigurationRecord *  hvcc  )

static

Definition at line 712 of file hevc.c.

Referenced by ff_isom_write_hvcc().

hvcc_init()

static void hvcc_init ( HEVCDecoderConfigurationRecord *  hvcc )

static

Definition at line 768 of file hevc.c.

Referenced by ff_isom_write_hvcc().

hvcc_close()

static void hvcc_close ( HEVCDecoderConfigurationRecord *  hvcc )

static

Definition at line 788 of file hevc.c.

Referenced by ff_isom_write_hvcc().

hvcc_write()

static int hvcc_write ( AVIOContext *  pb, HEVCDecoderConfigurationRecord *  hvcc  )

static

Definition at line 802 of file hevc.c.

Referenced by ff_isom_write_hvcc().

ff_hevc_annexb2mp4()

int ff_hevc_annexb2mp4	(	AVIOContext *	pb,
		const uint8_t *	buf_in,
		int	size,
		int	filter_ps,
		int *	ps_count
	)

Writes Annex B formatted HEVC NAL units to the provided AVIOContext.

The NAL units are converted to an MP4-compatible format (start code prefixes are replaced by 4-byte size fields, as per ISO/IEC 14496-15).

If filter_ps is non-zero, any HEVC parameter sets found in the input will be discarded, and *ps_count will be set to the number of discarded PS NAL units.

Parameters

pb	address of the AVIOContext where the data shall be written
buf_in	address of the buffer holding the input data
size	size (in bytes) of the input buffer
filter_ps	whether to write parameter set NAL units to the output (0) or to discard them (non-zero)
ps_count	address of the variable where the number of discarded parameter set NAL units shall be written, may be NULL

Returns

the amount (in bytes) of data written in case of success, a negative value corresponding to an AVERROR code in case of failure

Definition at line 998 of file hevc.c.

Referenced by ff_hevc_annexb2mp4_buf(), and ff_mov_write_packet().

ff_hevc_annexb2mp4_buf()

int ff_hevc_annexb2mp4_buf	(	const uint8_t *	buf_in,
		uint8_t **	buf_out,
		int *	size,
		int	filter_ps,
		int *	ps_count
	)

Writes Annex B formatted HEVC NAL units to a data buffer.

The NAL units are converted to an MP4-compatible format (start code prefixes are replaced by 4-byte size fields, as per ISO/IEC 14496-15).

If filter_ps is non-zero, any HEVC parameter sets found in the input will be discarded, and *ps_count will be set to the number of discarded PS NAL units.

On output, *size holds the size (in bytes) of the output data buffer.

Parameters

buf_in	address of the buffer holding the input data
size	address of the variable holding the size (in bytes) of the input buffer (on input) and of the output buffer (on output)
buf_out	address of the variable holding the address of the output buffer
filter_ps	whether to write parameter set NAL units to the output (0) or to discard them (non-zero)
ps_count	address of the variable where the number of discarded parameter set NAL units shall be written, may be NULL

Returns

the amount (in bytes) of data written in case of success, a negative value corresponding to an AVERROR code in case of failure

Definition at line 1046 of file hevc.c.

Referenced by ff_mov_write_packet(), and mkv_write_block().

ff_isom_write_hvcc()

int ff_isom_write_hvcc	(	AVIOContext *	pb,
		const uint8_t *	data,
		int	size,
		int	ps_array_completeness
	)

Writes HEVC extradata (parameter sets, declarative SEI NAL units) to the provided AVIOContext.

If the extradata is Annex B format, it gets converted to hvcC format before writing.

Parameters

pb	address of the AVIOContext where the hvcC shall be written
data	address of the buffer holding the data needed to write the hvcC
size	size (in bytes) of the data buffer
ps_array_completeness	whether all parameter sets are in the hvcC (1) or there may be additional parameter sets in the bitstream (0)

Returns

>=0 in case of success, a negative value corresponding to an AVERROR code in case of failure

Definition at line 1062 of file hevc.c.

Referenced by mkv_write_native_codecprivate(), and mov_write_hvcc_tag().