FFmpeg  4.0
Macros | Functions | Variables
cbs_mpeg2.c File Reference
#include "libavutil/avassert.h"
#include "cbs.h"
#include "cbs_internal.h"
#include "cbs_mpeg2.h"
#include "internal.h"
#include "cbs_mpeg2_syntax_template.c"

Go to the source code of this file.

Macros

#define HEADER(name)
 
#define CHECK(call)
 
#define FUNC_NAME(rw, codec, name)   cbs_ ## codec ## _ ## rw ## _ ## name
 
#define FUNC_MPEG2(rw, name)   FUNC_NAME(rw, mpeg2, name)
 
#define FUNC(name)   FUNC_MPEG2(READWRITE, name)
 
#define READ
 
#define READWRITE   read
 
#define RWContext   GetBitContext
 
#define xui(width, name, var)
 
#define ui(width, name)   xui(width, name, current->name)
 
#define marker_bit()
 
#define nextbits(width, compare, var)
 
#define WRITE
 
#define READWRITE   write
 
#define RWContext   PutBitContext
 
#define xui(width, name, var)
 
#define ui(width, name)   xui(width, name, current->name)
 
#define marker_bit()
 
#define nextbits(width, compare, var)   (var)
 
#define START(start_code, type, read_func, free_func)
 
#define START(start_code, type, func)
 

Functions

static void cbs_mpeg2_free_user_data (void *unit, uint8_t *content)
 
static void cbs_mpeg2_free_slice (void *unit, uint8_t *content)
 
static int cbs_mpeg2_split_fragment (CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, int header)
 
static int cbs_mpeg2_read_unit (CodedBitstreamContext *ctx, CodedBitstreamUnit *unit)
 
static int cbs_mpeg2_write_header (CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc)
 
static int cbs_mpeg2_write_slice (CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc)
 
static int cbs_mpeg2_write_unit (CodedBitstreamContext *ctx, CodedBitstreamUnit *unit)
 
static int cbs_mpeg2_assemble_fragment (CodedBitstreamContext *ctx, CodedBitstreamFragment *frag)
 
static void cbs_mpeg2_close (CodedBitstreamContext *ctx)
 

Variables

const CodedBitstreamType ff_cbs_type_mpeg2
 

Macro Definition Documentation

◆ HEADER

#define HEADER (   name)
Value:
do { \
ff_cbs_trace_header(ctx, name); \
} while (0)
name
const char * name
Definition: avisynth_c.h:775
ctx
AVFormatContext * ctx
Definition: movenc.c:48

Definition at line 27 of file cbs_mpeg2.c.

◆ CHECK

#define CHECK (   call)
Value:
do { \
err = (call); \
if (err < 0) \
return err; \
} while (0)

Definition at line 31 of file cbs_mpeg2.c.

◆ FUNC_NAME

#define FUNC_NAME (   rw,
  codec,
  name 
)    cbs_ ## codec ## _ ## rw ## _ ## name

Definition at line 37 of file cbs_mpeg2.c.

◆ FUNC_MPEG2

#define FUNC_MPEG2 (   rw,
  name 
)    FUNC_NAME(rw, mpeg2, name)

Definition at line 38 of file cbs_mpeg2.c.

◆ FUNC

#define FUNC (   name)    FUNC_MPEG2(READWRITE, name)

Definition at line 39 of file cbs_mpeg2.c.

◆ READ

#define READ

Definition at line 42 of file cbs_mpeg2.c.

◆ READWRITE [1/2]

#define READWRITE   read

Definition at line 77 of file cbs_mpeg2.c.

◆ RWContext [1/2]

#define RWContext   GetBitContext

Definition at line 78 of file cbs_mpeg2.c.

◆ xui [1/2]

#define xui (   width,
  name,
  var 
)
Value:
do { \
uint32_t value = 0; \
CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
&value, 0, (1 << width) - 1)); \
var = value; \
} while (0)
name
const char * name
Definition: avisynth_c.h:775
width
uint16_t width
Definition: gdv.c:47
ctx
AVFormatContext * ctx
Definition: movenc.c:48
value
double value
Definition: eval.c:98
ff_cbs_read_unsigned
int ff_cbs_read_unsigned(CodedBitstreamContext *ctx, GetBitContext *gbc, int width, const char *name, uint32_t *write_to, uint32_t range_min, uint32_t range_max)
Definition: cbs.c:378

Definition at line 80 of file cbs_mpeg2.c.

Referenced by slice_header(), and user_data().

◆ ui [1/2]

#define ui (   width,
  name 
)    xui(width, name, current->name)

Definition at line 85 of file cbs_mpeg2.c.

Referenced by butterworth_bp_filter(), chebyshev1_bp_filter(), chebyshev2_bp_filter(), extension_data(), group_of_pictures_header(), picture_coding_extension(), picture_display_extension(), picture_header(), quant_matrix_extension(), sequence_display_extension(), sequence_extension(), sequence_header(), slice_header(), and user_data().

◆ marker_bit [1/2]

#define marker_bit ( )
Value:
do { \
av_unused uint32_t one; \
CHECK(ff_cbs_read_unsigned(ctx, rw, 1, "marker_bit", &one, 1, 1)); \
} while (0)
ctx
AVFormatContext * ctx
Definition: movenc.c:48
ff_cbs_read_unsigned
int ff_cbs_read_unsigned(CodedBitstreamContext *ctx, GetBitContext *gbc, int width, const char *name, uint32_t *write_to, uint32_t range_min, uint32_t range_max)
Definition: cbs.c:378

Definition at line 88 of file cbs_mpeg2.c.

Referenced by picture_display_extension(), sequence_display_extension(), sequence_extension(), and sequence_header().

◆ nextbits [1/2]

#define nextbits (   width,
  compare,
  var 
)
Value:
(get_bits_left(rw) >= width && \
(var = show_bits(rw, width)) == (compare))
compare
static float compare(const AVFrame *haystack, const AVFrame *obj, int offx, int offy)
Definition: vf_find_rect.c:105
get_bits_left
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:596
width
uint16_t width
Definition: gdv.c:47
show_bits
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:304

Definition at line 92 of file cbs_mpeg2.c.

Referenced by slice_header().

◆ WRITE

#define WRITE

Definition at line 76 of file cbs_mpeg2.c.

◆ READWRITE [2/2]

#define READWRITE   write

Definition at line 77 of file cbs_mpeg2.c.

◆ RWContext [2/2]

#define RWContext   PutBitContext

Definition at line 78 of file cbs_mpeg2.c.

◆ xui [2/2]

#define xui (   width,
  name,
  var 
)
Value:
do { \
CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
var, 0, (1 << width) - 1)); \
} while (0)
name
const char * name
Definition: avisynth_c.h:775
ff_cbs_write_unsigned
int ff_cbs_write_unsigned(CodedBitstreamContext *ctx, PutBitContext *pbc, int width, const char *name, uint32_t value, uint32_t range_min, uint32_t range_max)
Definition: cbs.c:419
width
uint16_t width
Definition: gdv.c:47
ctx
AVFormatContext * ctx
Definition: movenc.c:48

Definition at line 80 of file cbs_mpeg2.c.

◆ ui [2/2]

#define ui (   width,
  name 
)    xui(width, name, current->name)

Definition at line 85 of file cbs_mpeg2.c.

◆ marker_bit [2/2]

#define marker_bit ( )
Value:
do { \
CHECK(ff_cbs_write_unsigned(ctx, rw, 1, "marker_bit", 1, 1, 1)); \
} while (0)
ff_cbs_write_unsigned
int ff_cbs_write_unsigned(CodedBitstreamContext *ctx, PutBitContext *pbc, int width, const char *name, uint32_t value, uint32_t range_min, uint32_t range_max)
Definition: cbs.c:419
ctx
AVFormatContext * ctx
Definition: movenc.c:48

Definition at line 88 of file cbs_mpeg2.c.

◆ nextbits [2/2]

#define nextbits (   width,
  compare,
  var 
)    (var)

Definition at line 92 of file cbs_mpeg2.c.

◆ START [1/2]

#define START (   start_code,
  type,
  read_func,
  free_func 
)
Value:
case start_code: \
{ \
type *header; \
err = ff_cbs_alloc_unit_content(ctx, unit, \
sizeof(*header), free_func); \
if (err < 0) \
return err; \
header = unit->content; \
err = cbs_mpeg2_read_ ## read_func(ctx, &gbc, header); \
if (err < 0) \
return err; \
} \
break;
ff_cbs_alloc_unit_content
int ff_cbs_alloc_unit_content(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, size_t size, void(*free)(void *opaque, uint8_t *data))
Definition: cbs.c:454
header
static const uint8_t header[24]
Definition: sdr2.c:67
ctx
AVFormatContext * ctx
Definition: movenc.c:48
start_code
static const uint8_t start_code[]
Definition: videotoolboxenc.c:168

Referenced by cbs_mpeg2_read_unit(), and cbs_mpeg2_write_header().

◆ START [2/2]

#define START (   start_code,
  type,
  func 
)
Value:
case start_code: \
err = cbs_mpeg2_write_ ## func(ctx, pbc, unit->content); \
break;
ctx
AVFormatContext * ctx
Definition: movenc.c:48
func
int(* func)(AVBPrint *dst, const char *in, const char *arg)
Definition: jacosubdec.c:67
start_code
static const uint8_t start_code[]
Definition: videotoolboxenc.c:168

Function Documentation

◆ cbs_mpeg2_free_user_data()

static void cbs_mpeg2_free_user_data ( void *  unit,
uint8_t *  content 
)
static

Definition at line 105 of file cbs_mpeg2.c.

Referenced by cbs_mpeg2_read_unit().

◆ cbs_mpeg2_free_slice()

static void cbs_mpeg2_free_slice ( void *  unit,
uint8_t *  content 
)
static

Definition at line 112 of file cbs_mpeg2.c.

Referenced by cbs_mpeg2_read_unit().

◆ cbs_mpeg2_split_fragment()

static int cbs_mpeg2_split_fragment ( CodedBitstreamContext *  ctx,
CodedBitstreamFragment *  frag,
int  header 
)
static

Definition at line 120 of file cbs_mpeg2.c.

◆ cbs_mpeg2_read_unit()

static int cbs_mpeg2_read_unit ( CodedBitstreamContext *  ctx,
CodedBitstreamUnit *  unit 
)
static

Definition at line 172 of file cbs_mpeg2.c.

◆ cbs_mpeg2_write_header()

static int cbs_mpeg2_write_header ( CodedBitstreamContext *  ctx,
CodedBitstreamUnit *  unit,
PutBitContext *  pbc 
)
static

Definition at line 246 of file cbs_mpeg2.c.

Referenced by cbs_mpeg2_write_unit().

◆ cbs_mpeg2_write_slice()

static int cbs_mpeg2_write_slice ( CodedBitstreamContext *  ctx,
CodedBitstreamUnit *  unit,
PutBitContext *  pbc 
)
static

Definition at line 272 of file cbs_mpeg2.c.

Referenced by cbs_mpeg2_write_unit().

◆ cbs_mpeg2_write_unit()

static int cbs_mpeg2_write_unit ( CodedBitstreamContext *  ctx,
CodedBitstreamUnit *  unit 
)
static

Definition at line 306 of file cbs_mpeg2.c.

◆ cbs_mpeg2_assemble_fragment()

static int cbs_mpeg2_assemble_fragment ( CodedBitstreamContext *  ctx,
CodedBitstreamFragment *  frag 
)
static

Definition at line 361 of file cbs_mpeg2.c.

◆ cbs_mpeg2_close()

static void cbs_mpeg2_close ( CodedBitstreamContext *  ctx)
static

Definition at line 398 of file cbs_mpeg2.c.

Variable Documentation

◆ ff_cbs_type_mpeg2

const CodedBitstreamType ff_cbs_type_mpeg2
Initial value:
= {
.codec_id = AV_CODEC_ID_MPEG2VIDEO,
.priv_data_size = sizeof(CodedBitstreamMPEG2Context),
.split_fragment = &cbs_mpeg2_split_fragment,
.read_unit = &cbs_mpeg2_read_unit,
.write_unit = &cbs_mpeg2_write_unit,
.assemble_fragment = &cbs_mpeg2_assemble_fragment,
.close = &cbs_mpeg2_close,
}
cbs_mpeg2_write_unit
static int cbs_mpeg2_write_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit)
Definition: cbs_mpeg2.c:306
cbs_mpeg2_read_unit
static int cbs_mpeg2_read_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit)
Definition: cbs_mpeg2.c:172
cbs_mpeg2_assemble_fragment
static int cbs_mpeg2_assemble_fragment(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag)
Definition: cbs_mpeg2.c:361
cbs_mpeg2_split_fragment
static int cbs_mpeg2_split_fragment(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, int header)
Definition: cbs_mpeg2.c:120
AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:220
cbs_mpeg2_close
static void cbs_mpeg2_close(CodedBitstreamContext *ctx)
Definition: cbs_mpeg2.c:398

Definition at line 405 of file cbs_mpeg2.c.

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