h264dec.c File Reference

H.264 / AVC / MPEG-4 part10 codec. More...

#include "config_components.h"
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/emms.h"
#include "libavutil/imgutils.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/thread.h"
#include "libavutil/video_enc_params.h"
#include "codec_internal.h"
#include "internal.h"
#include "error_resilience.h"
#include "avcodec.h"
#include "h264.h"
#include "h264dec.h"
#include "h2645_parse.h"
#include "h264data.h"
#include "h264_ps.h"
#include "golomb.h"
#include "hwaccel_internal.h"
#include "hwconfig.h"
#include "mpegutils.h"
#include "profiles.h"
#include "rectangle.h"
#include "libavutil/refstruct.h"
#include "thread.h"
#include "threadframe.h"

Go to the source code of this file.

Macros
#define	UNCHECKED_BITSTREAM_READER   1
#define	OFFSET(x)
#define	VD   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
#define	VDX   VD | AV_OPT_FLAG_EXPORT

Functions
int	avpriv_h264_has_num_reorder_frames (AVCodecContext *avctx)
static void	h264_er_decode_mb (void *opaque, int ref, int mv_dir, int mv_type, int(*mv)[2][4][2], int mb_x, int mb_y, int mb_intra, int mb_skipped)
void	ff_h264_draw_horiz_band (const H264Context *h, H264SliceContext *sl, int y, int height)
void	ff_h264_free_tables (H264Context *h)
int	ff_h264_alloc_tables (H264Context *h)
	Allocate tables.
void	ff_h264_slice_context_init (H264Context *h, H264SliceContext *sl)
	Init slice context.
static int	h264_init_pic (H264Picture *pic)
static int	h264_init_context (AVCodecContext *avctx, H264Context *h)
static void	h264_free_pic (H264Context *h, H264Picture *pic)
static av_cold int	h264_decode_end (AVCodecContext *avctx)
static av_cold int	h264_decode_init (AVCodecContext *avctx)
static void	idr (H264Context *h)
	instantaneous decoder refresh.
void	ff_h264_flush_change (H264Context *h)
static av_cold void	h264_decode_flush (AVCodecContext *avctx)
static int	get_last_needed_nal (H264Context *h)
static void	debug_green_metadata (const H264SEIGreenMetaData *gm, void *logctx)
static int	decode_nal_units (H264Context *h, AVBufferRef *buf_ref, const uint8_t *buf, int buf_size)
static int	h264_export_enc_params (AVFrame *f, const H264Picture *p)
static int	output_frame (H264Context *h, AVFrame *dst, H264Picture *srcp)
static int	is_avcc_extradata (const uint8_t *buf, int buf_size)
static int	finalize_frame (H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
static int	send_next_delayed_frame (H264Context *h, AVFrame *dst_frame, int *got_frame, int buf_index)
static int	h264_decode_frame (AVCodecContext *avctx, AVFrame *pict, int *got_frame, AVPacket *avpkt)

Variables
const uint16_t	ff_h264_mb_sizes [4] = { 256, 384, 512, 768 }
static AVOnce	h264_vlc_init = AV_ONCE_INIT
static const AVOption	h264_options []
static const AVClass	h264_class
const FFCodec	ff_h264_decoder

Detailed Description

H.264 / AVC / MPEG-4 part10 codec.

Author

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

Definition in file h264dec.c.

Macro Definition Documentation

UNCHECKED_BITSTREAM_READER

#define UNCHECKED_BITSTREAM_READER   1

Definition at line 28 of file h264dec.c.

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(H264Context, x)

Definition at line 1089 of file h264dec.c.

VD

#define VD   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM

Definition at line 1090 of file h264dec.c.

VDX

#define VDX   VD | AV_OPT_FLAG_EXPORT

Definition at line 1091 of file h264dec.c.

Function Documentation

avpriv_h264_has_num_reorder_frames()

int avpriv_h264_has_num_reorder_frames

(

AVCodecContext *

avctx

)

Definition at line 62 of file h264dec.c.

Referenced by has_decode_delay_been_guessed().

h264_er_decode_mb()

static void h264_er_decode_mb ( void * opaque, int ref, int mv_dir, int mv_type, int(*) mv[2][4][2], int mb_x, int mb_y, int mb_intra, int mb_skipped )

static

Definition at line 68 of file h264dec.c.

Referenced by ff_h264_alloc_tables().

ff_h264_draw_horiz_band()

void ff_h264_draw_horiz_band	(	const H264Context *	h,
		H264SliceContext *	sl,
		int	y,
		int	height )

Definition at line 104 of file h264dec.c.

Referenced by d3d12va_h264_end_frame(), decode_finish_row(), dxva2_h264_end_frame(), vaapi_h264_end_frame(), and vdpau_h264_end_frame().

ff_h264_free_tables()

void ff_h264_free_tables

(

H264Context *

h

)

Definition at line 142 of file h264dec.c.

Referenced by h264_decode_end(), h264_decode_flush(), and h264_slice_header_init().

ff_h264_alloc_tables()

int ff_h264_alloc_tables

(

H264Context *

h

)

Allocate tables.

needs width/height

Definition at line 187 of file h264dec.c.

Referenced by h264_slice_header_init().

ff_h264_slice_context_init()

void ff_h264_slice_context_init	(	H264Context *	h,
		H264SliceContext *	sl )

Init slice context.

Definition at line 264 of file h264dec.c.

Referenced by h264_slice_header_init().

h264_init_pic()

static int h264_init_pic ( H264Picture * pic )

static

Definition at line 276 of file h264dec.c.

Referenced by h264_init_context().

h264_init_context()

static int h264_init_context ( AVCodecContext * avctx, H264Context * h )

static

Definition at line 289 of file h264dec.c.

Referenced by h264_decode_init().

h264_free_pic()

static void h264_free_pic ( H264Context * h, H264Picture * pic )

static

Definition at line 344 of file h264dec.c.

Referenced by h264_decode_end().

h264_decode_end()

static av_cold int h264_decode_end ( AVCodecContext * avctx )

static

Definition at line 351 of file h264dec.c.

h264_decode_init()

static av_cold int h264_decode_init ( AVCodecContext * avctx )

static

Definition at line 384 of file h264dec.c.

idr()

static void idr ( H264Context * h )

static

instantaneous decoder refresh.

Definition at line 438 of file h264dec.c.

Referenced by decode_nal_units(), ff_h264_flush_change(), ff_isom_write_lvcc(), and h264_probe().

ff_h264_flush_change()

void ff_h264_flush_change

(

H264Context *

h

)

Definition at line 451 of file h264dec.c.

Referenced by h264_decode_flush(), h264_decode_init(), and h264_init_ps().

h264_decode_flush()

static av_cold void h264_decode_flush ( AVCodecContext * avctx )

static

Definition at line 476 of file h264dec.c.

get_last_needed_nal()

static int get_last_needed_nal ( H264Context * h )

static

Definition at line 501 of file h264dec.c.

Referenced by decode_nal_units().

debug_green_metadata()

static void debug_green_metadata ( const H264SEIGreenMetaData * gm, void * logctx )

static

Definition at line 555 of file h264dec.c.

Referenced by decode_nal_units().

decode_nal_units()

static int decode_nal_units ( H264Context * h, AVBufferRef * buf_ref, const uint8_t * buf, int buf_size )

static

< number of NALs that need decoding before the next frame thread starts

Definition at line 583 of file h264dec.c.

Referenced by h264_decode_frame().

h264_export_enc_params()

static int h264_export_enc_params ( AVFrame * f, const H264Picture * p )

static

Definition at line 826 of file h264dec.c.

Referenced by output_frame().

output_frame()

static int output_frame ( H264Context * h, AVFrame * dst, H264Picture * srcp )

static

Definition at line 860 of file h264dec.c.

Referenced by deint_vaapi_filter_frame(), drawbox_vaapi_filter_frame(), ff_vaapi_vpp_init_params(), ff_vaapi_vpp_render_picture(), ff_vaapi_vpp_render_pictures(), filter_frame(), filter_frame(), filter_frame(), finalize_frame(), load_encode_and_write(), misc_vaapi_filter_frame(), ocio_apply(), pad_vaapi_filter_frame(), procamp_vaapi_filter_frame(), sbc_synthesize_audio(), sbc_synthesize_eight(), sbc_synthesize_four(), scale_d3d12_filter_frame(), scale_vaapi_filter_frame(), tonemap_vaapi_filter_frame(), tonemap_vaapi_update_sidedata(), transpose_vaapi_filter_frame(), and vaapi_vpp_colour_properties().

is_avcc_extradata()

static int is_avcc_extradata ( const uint8_t * buf, int buf_size )

static

Definition at line 899 of file h264dec.c.

Referenced by h264_decode_frame().

finalize_frame()

static int finalize_frame ( H264Context * h, AVFrame * dst, H264Picture * out, int * got_frame )

static

Definition at line 923 of file h264dec.c.

Referenced by h264_decode_frame(), and send_next_delayed_frame().

send_next_delayed_frame()

static int send_next_delayed_frame ( H264Context * h, AVFrame * dst_frame, int * got_frame, int buf_index )

static

Definition at line 978 of file h264dec.c.

Referenced by h264_decode_frame().

h264_decode_frame()

static int h264_decode_frame ( AVCodecContext * avctx, AVFrame * pict, int * got_frame, AVPacket * avpkt )

static

Definition at line 1019 of file h264dec.c.

Variable Documentation

ff_h264_mb_sizes

const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 }

Definition at line 60 of file h264dec.c.

Referenced by ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), and hl_decode_mb().

h264_vlc_init

AVOnce h264_vlc_init = AV_ONCE_INIT

static

Definition at line 382 of file h264dec.c.

Referenced by h264_decode_init().

h264_options

const AVOption h264_options[]

static

Initial value:

= {
    { "is_avc", "is avc", OFFSET(is_avc), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, VDX },
    { "nal_length_size", "nal_length_size", OFFSET(nal_length_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 4, VDX },
    { "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VD },
    { "x264_build", "Assume this x264 version if no x264 version found in any SEI", OFFSET(x264_build), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VD },
    { "skip_gray", "Do not return gray gap frames", OFFSET(skip_gray), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, VD },
    { "noref_gray", "Avoid using gray gap frames as references", OFFSET(noref_gray), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, VD },
    { NULL },
}

Definition at line 1092 of file h264dec.c.

h264_class

const AVClass h264_class

static

Initial value:

= {
    .class_name = "H264 Decoder",
    .item_name  = av_default_item_name,
    .option     = h264_options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 1102 of file h264dec.c.

ff_h264_decoder

const FFCodec ff_h264_decoder

Definition at line 1109 of file h264dec.c.

Referenced by imm5_init().