cbs_jpeg.c File Reference

#include "libavutil/mem.h"
#include "cbs.h"
#include "cbs_internal.h"
#include "cbs_jpeg.h"
#include "cbs_jpeg_syntax_template.c"

Go to the source code of this file.

Macros
#define	HEADER(name)
#define	CHECK(call)
#define	SUBSCRIPTS(subs, ...)
#define	u(width, name, range_min, range_max)
#define	us(width, name, sub, range_min, range_max)
#define	READ
#define	READWRITE   read
#define	RWContext   GetBitContext
#define	FUNC(name)
#define	xu(width, name, range_min, range_max, subs, ...)
#define	WRITE
#define	READWRITE   write
#define	RWContext   PutBitContext
#define	FUNC(name)
#define	xu(width, name, range_min, range_max, subs, ...)
#define	SEGMENT(marker, func)
#define	SEGMENT(marker, func)

Functions
static int	cbs_jpeg_split_fragment (CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, int header)
static int	cbs_jpeg_read_unit (CodedBitstreamContext *ctx, CodedBitstreamUnit *unit)
static int	cbs_jpeg_write_scan (CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc)
static int	cbs_jpeg_write_segment (CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc)
static int	cbs_jpeg_write_unit (CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc)
static int	cbs_jpeg_assemble_fragment (CodedBitstreamContext *ctx, CodedBitstreamFragment *frag)

Variables
static CodedBitstreamUnitTypeDescriptor	cbs_jpeg_unit_types []
const CodedBitstreamType	ff_cbs_type_jpeg

Macro Definition Documentation

HEADER

#define HEADER

(

name

)

Value:

        do { \
        ff_cbs_trace_header(ctx, name); \
    } while (0)

Definition at line 25 of file cbs_jpeg.c.

CHECK

#define CHECK

(

call

)

Value:

        do { \
        err = (call); \
        if (err < 0) \
            return err; \
    } while (0)

Definition at line 29 of file cbs_jpeg.c.

SUBSCRIPTS

#define SUBSCRIPTS	(		subs,
			... )

Value:

(subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)

Definition at line 35 of file cbs_jpeg.c.

u

#define u	(		width,
			name,
			range_min,
			range_max )

Value:

    xu(width, name, range_min, range_max, 0, )

Definition at line 37 of file cbs_jpeg.c.

us

#define us	(		width,
			name,
			sub,
			range_min,
			range_max )

Value:

    xu(width, name, range_min, range_max, 1, sub)

Definition at line 39 of file cbs_jpeg.c.

READ

#define READ

Definition at line 43 of file cbs_jpeg.c.

READWRITE [1/2]

#define READWRITE   read

Definition at line 44 of file cbs_jpeg.c.

RWContext [1/2]

#define RWContext   GetBitContext

Definition at line 45 of file cbs_jpeg.c.

FUNC [1/2]

#define FUNC

(

name

)

Value:

cbs_jpeg_read_ ## name

Definition at line 46 of file cbs_jpeg.c.

xu [1/2]

#define xu	(		width,
			name,
			range_min,
			range_max,
			subs,
			... )

Value:

        do { \
        uint32_t value; \
        CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
                                   SUBSCRIPTS(subs, __VA_ARGS__), \
                                   &value, range_min, range_max)); \
        current->name = value; \
    } while (0)

Definition at line 48 of file cbs_jpeg.c.

WRITE

#define WRITE

Definition at line 64 of file cbs_jpeg.c.

READWRITE [2/2]

#define READWRITE   write

Definition at line 44 of file cbs_jpeg.c.

RWContext [2/2]

#define RWContext   PutBitContext

Definition at line 45 of file cbs_jpeg.c.

FUNC [2/2]

#define FUNC

(

name

)

Value:

cbs_jpeg_write_ ## name

Definition at line 46 of file cbs_jpeg.c.

xu [2/2]

#define xu	(		width,
			name,
			range_min,
			range_max,
			subs,
			... )

Value:

        do { \
        uint32_t value = current->name; \
        CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
                                    SUBSCRIPTS(subs, __VA_ARGS__), \
                                    value, range_min, range_max)); \
    } while (0)

Definition at line 48 of file cbs_jpeg.c.

SEGMENT [1/2]

#define SEGMENT	(		marker,
			func )

Value:

        case JPEG_MARKER_ ## marker: \
            { \
                err = cbs_jpeg_read_ ## func(ctx, &gbc, unit->content); \
                if (err < 0) \
                    return err; \
            } \
            break

Referenced by cbs_jpeg_read_unit(), and cbs_jpeg_write_segment().

SEGMENT [2/2]

#define SEGMENT	(		marker,
			func )

Value:

            case JPEG_MARKER_ ## marker: \
                err = cbs_jpeg_write_ ## func(ctx, pbc, unit->content); \
                break;

Function Documentation

cbs_jpeg_split_fragment()

static int cbs_jpeg_split_fragment ( CodedBitstreamContext * ctx, CodedBitstreamFragment * frag, int header )

static

Definition at line 86 of file cbs_jpeg.c.

cbs_jpeg_read_unit()

static int cbs_jpeg_read_unit ( CodedBitstreamContext * ctx, CodedBitstreamUnit * unit )

static

Definition at line 221 of file cbs_jpeg.c.

cbs_jpeg_write_scan()

static int cbs_jpeg_write_scan ( CodedBitstreamContext * ctx, CodedBitstreamUnit * unit, PutBitContext * pbc )

static

Definition at line 287 of file cbs_jpeg.c.

Referenced by cbs_jpeg_write_unit().

cbs_jpeg_write_segment()

static int cbs_jpeg_write_segment ( CodedBitstreamContext * ctx, CodedBitstreamUnit * unit, PutBitContext * pbc )

static

Definition at line 313 of file cbs_jpeg.c.

Referenced by cbs_jpeg_write_unit().

cbs_jpeg_write_unit()

static int cbs_jpeg_write_unit ( CodedBitstreamContext * ctx, CodedBitstreamUnit * unit, PutBitContext * pbc )

static

Definition at line 342 of file cbs_jpeg.c.

cbs_jpeg_assemble_fragment()

static int cbs_jpeg_assemble_fragment ( CodedBitstreamContext * ctx, CodedBitstreamFragment * frag )

static

Definition at line 352 of file cbs_jpeg.c.

Variable Documentation

cbs_jpeg_unit_types

CodedBitstreamUnitTypeDescriptor cbs_jpeg_unit_types[]

static

Initial value:

= {
    CBS_UNIT_RANGE_POD(JPEG_MARKER_SOF0, JPEG_MARKER_SOF3, JPEGRawFrameHeader),
 
    CBS_UNIT_RANGE_INTERNAL_REF(JPEG_MARKER_APPN, JPEG_MARKER_APPN + 15,
                                JPEGRawApplicationData, Ap),
 
    CBS_UNIT_TYPE_INTERNAL_REF(JPEG_MARKER_SOS, JPEGRawScan, data),
 
    CBS_UNIT_TYPE_POD(JPEG_MARKER_DQT, JPEGRawQuantisationTableSpecification),
    CBS_UNIT_TYPE_POD(JPEG_MARKER_DHT, JPEGRawHuffmanTableSpecification),
 
    CBS_UNIT_TYPE_INTERNAL_REF(JPEG_MARKER_COM, JPEGRawComment, Cm),
 
    CBS_UNIT_TYPE_END_OF_LIST
}

Definition at line 420 of file cbs_jpeg.c.

ff_cbs_type_jpeg

const CodedBitstreamType ff_cbs_type_jpeg

Initial value:

= {
    .codec_id          = AV_CODEC_ID_MJPEG,
 
    .unit_types        = cbs_jpeg_unit_types,
 
    .split_fragment    = &cbs_jpeg_split_fragment,
    .read_unit         = &cbs_jpeg_read_unit,
    .write_unit        = &cbs_jpeg_write_unit,
    .assemble_fragment = &cbs_jpeg_assemble_fragment,
}

Definition at line 436 of file cbs_jpeg.c.