rjpeg.c File Reference

#include <stdint.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <retro_assert.h>
#include <retro_inline.h>
#include <boolean.h>
#include <formats/image.h>
#include <formats/rjpeg.h>
#include <features/features_cpu.h>

Include dependency graph for rjpeg.c:

Classes
struct	rjpeg__resample
struct	rjpeg
struct	rjpeg__context
struct	rjpeg__huffman
struct	rjpeg__jpeg

Macros
#define	rjpeg_lrot(x, y)   (((x) << (y)) | ((x) >> (32 - (y))))
#define	RJPEG_SIMD_ALIGN(type, name)   type name
#define	RJPEG__AT_EOF(s)   ((s)->img_buffer >= (s)->img_buffer_end)
#define	RJPEG__GET16BE(s)   ((rjpeg__get8((s)) << 8) + rjpeg__get8((s)))
#define	RJPEG__BYTECAST(x)   ((uint8_t) ((x) & 255)) /* truncate int to byte without warnings */
#define	FAST_BITS   9 /* larger handles more cases; smaller stomps less cache */
#define	rjpeg__f2f(x)   ((int) (((x) * 4096 + 0.5)))
#define	rjpeg__fsh(x)   ((x) << 12)
#define	RJPEG__MARKER_NONE   0xff
#define	RJPEG__RESTART(x)   ((x) >= 0xd0 && (x) <= 0xd7)
#define	JPEG_MARKER   0xFF
#define	JPEG_MARKER_SOI   0xD8
#define	JPEG_MARKER_SOS   0xDA
#define	JPEG_MARKER_EOI   0xD9
#define	JPEG_MARKER_APP1   0xE1
#define	JPEG_MARKER_APP2   0xE2
#define	rjpeg__SOF(x)   ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2)
#define	rjpeg__SOF_progressive(x)   ((x) == 0xc2)
#define	rjpeg__div4(x)   ((uint8_t) ((x) >> 2))
#define	rjpeg__div16(x)   ((uint8_t) ((x) >> 4))
#define	RJPEG__IDCT_1D(s0, s1, s2, s3, s4, s5, s6, s7)
#define	float2fixed(x)   (((int) ((x) * 4096.0f + 0.5f)) << 8)

Typedefs
typedef uint8_t *(*	rjpeg_resample_row_func) (uint8_t *out, uint8_t *in0, uint8_t *in1, int w, int hs)

Enumerations
enum	{   RJPEG_DEFAULT = 0, RJPEG_GREY, RJPEG_GREY_ALPHA, RJPEG_RGB,   RJPEG_RGB_ALPHA }
enum	{ RJPEG_SCAN_LOAD = 0, RJPEG_SCAN_TYPE, RJPEG_SCAN_HEADER }

Functions
static INLINE uint8_t	rjpeg__get8 (rjpeg__context *s)
static int	rjpeg__build_huffman (rjpeg__huffman *h, int *count)
static void	rjpeg__build_fast_ac (int16_t *fast_ac, rjpeg__huffman *h)
static void	rjpeg__grow_buffer_unsafe (rjpeg__jpeg *j)
static INLINE int	rjpeg__jpeg_huff_decode (rjpeg__jpeg *j, rjpeg__huffman *h)
static INLINE int	rjpeg__extend_receive (rjpeg__jpeg *j, int n)
static INLINE int	rjpeg__jpeg_get_bits (rjpeg__jpeg *j, int n)
static INLINE int	rjpeg__jpeg_get_bit (rjpeg__jpeg *j)
static int	rjpeg__jpeg_decode_block (rjpeg__jpeg *j, short data[64], rjpeg__huffman *hdc, rjpeg__huffman *hac, int16_t *fac, int b, uint8_t *dequant)
static int	rjpeg__jpeg_decode_block_prog_dc (rjpeg__jpeg *j, short data[64], rjpeg__huffman *hdc, int b)
static int	rjpeg__jpeg_decode_block_prog_ac (rjpeg__jpeg *j, short data[64], rjpeg__huffman *hac, int16_t *fac)
static INLINE uint8_t	rjpeg__clamp (int x)
static void	rjpeg__idct_block (uint8_t *out, int out_stride, short data[64])
static uint8_t	rjpeg__get_marker (rjpeg__jpeg *j)
static void	rjpeg__jpeg_reset (rjpeg__jpeg *j)
static int	rjpeg__parse_entropy_coded_data (rjpeg__jpeg *z)
static void	rjpeg__jpeg_dequantize (short *data, uint8_t *dequant)
static void	rjpeg__jpeg_finish (rjpeg__jpeg *z)
static int	rjpeg__process_marker (rjpeg__jpeg *z, int m)
static int	rjpeg__process_scan_header (rjpeg__jpeg *z)
static int	rjpeg__process_frame_header (rjpeg__jpeg *z, int scan)
static int	rjpeg__decode_jpeg_header (rjpeg__jpeg *z, int scan)
static int	rjpeg__decode_jpeg_image (rjpeg__jpeg *j)
static uint8_t *	rjpeg_resample_row_1 (uint8_t *out, uint8_t *in_near, uint8_t *in_far, int w, int hs)
static uint8_t *	rjpeg__resample_row_v_2 (uint8_t *out, uint8_t *in_near, uint8_t *in_far, int w, int hs)
static uint8_t *	rjpeg__resample_row_h_2 (uint8_t *out, uint8_t *in_near, uint8_t *in_far, int w, int hs)
static uint8_t *	rjpeg__resample_row_hv_2 (uint8_t *out, uint8_t *in_near, uint8_t *in_far, int w, int hs)
static uint8_t *	rjpeg__resample_row_generic (uint8_t *out, uint8_t *in_near, uint8_t *in_far, int w, int hs)
static void	rjpeg__YCbCr_to_RGB_row (uint8_t *out, const uint8_t *y, const uint8_t *pcb, const uint8_t *pcr, int count, int step)
static void	rjpeg__setup_jpeg (rjpeg__jpeg *j)
static void	rjpeg__cleanup_jpeg (rjpeg__jpeg *j)
static uint8_t *	rjpeg_load_jpeg_image (rjpeg__jpeg *z, unsigned *out_x, unsigned *out_y, int *comp, int req_comp)
static uint8_t *	rjpeg_load_from_memory (const uint8_t *buffer, int len, unsigned *x, unsigned *y, int *comp, int req_comp)
int	rjpeg_process_image (rjpeg_t *rjpeg, void **buf_data, size_t size, unsigned *width, unsigned *height)
bool	rjpeg_set_buf_ptr (rjpeg_t *rjpeg, void *data)
void	rjpeg_free (rjpeg_t *rjpeg)
rjpeg_t *	rjpeg_alloc (void)

Variables
static uint32_t	rjpeg__bmask [17] ={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535}
static int const	rjpeg__jbias [16] = {0,-1,-3,-7,-15,-31,-63,-127,-255,-511,-1023,-2047,-4095,-8191,-16383,-32767}
static uint8_t	rjpeg__jpeg_dezigzag [64+15]

Macro Definition Documentation

FAST_BITS

#define FAST_BITS   9 /* larger handles more cases; smaller stomps less cache */

float2fixed

#define float2fixed

(

x

)

(((int) ((x) * 4096.0f + 0.5f)) << 8)

JPEG_MARKER

#define JPEG_MARKER   0xFF

JPEG_MARKER_APP1

#define JPEG_MARKER_APP1   0xE1

JPEG_MARKER_APP2

#define JPEG_MARKER_APP2   0xE2

JPEG_MARKER_EOI

#define JPEG_MARKER_EOI   0xD9

JPEG_MARKER_SOI

#define JPEG_MARKER_SOI   0xD8

JPEG_MARKER_SOS

#define JPEG_MARKER_SOS   0xDA

RJPEG__AT_EOF

#define RJPEG__AT_EOF

(

s

)

((s)->img_buffer >= (s)->img_buffer_end)

RJPEG__BYTECAST

#define RJPEG__BYTECAST

(

x

)

((uint8_t) ((x) & 255)) /* truncate int to byte without warnings */

rjpeg__div16

#define rjpeg__div16

(

x

)

((uint8_t) ((x) >> 4))

rjpeg__div4

#define rjpeg__div4

(

x

)

((uint8_t) ((x) >> 2))

rjpeg__f2f

#define rjpeg__f2f

(

x

)

((int) (((x) * 4096 + 0.5)))

rjpeg__fsh

#define rjpeg__fsh

(

x

)

((x) << 12)

RJPEG__GET16BE

#define RJPEG__GET16BE

(

s

)

((rjpeg__get8((s)) << 8) + rjpeg__get8((s)))

RJPEG__IDCT_1D

#define RJPEG__IDCT_1D	(		s0,
			s1,
			s2,
			s3,
			s4,
			s5,
			s6,
			s7
	)

RJPEG__MARKER_NONE

#define RJPEG__MARKER_NONE   0xff

RJPEG__RESTART

#define RJPEG__RESTART

(

x

)

((x) >= 0xd0 && (x) <= 0xd7)

rjpeg__SOF

#define rjpeg__SOF

(

x

)

((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2)

rjpeg__SOF_progressive

#define rjpeg__SOF_progressive

(

x

)

((x) == 0xc2)

rjpeg_lrot

#define rjpeg_lrot	(		x,
			y
	)		(((x) << (y)) | ((x) >> (32 - (y))))

RJPEG_SIMD_ALIGN

#define RJPEG_SIMD_ALIGN	(		type,
			name
	)		type name

Typedef Documentation

rjpeg_resample_row_func

typedef uint8_t*(* rjpeg_resample_row_func) (uint8_t *out, uint8_t *in0, uint8_t *in1, int w, int hs)

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
RJPEG_DEFAULT
RJPEG_GREY
RJPEG_GREY_ALPHA
RJPEG_RGB
RJPEG_RGB_ALPHA

anonymous enum

anonymous enum

Enumerator
RJPEG_SCAN_LOAD
RJPEG_SCAN_TYPE
RJPEG_SCAN_HEADER

Function Documentation

rjpeg__build_fast_ac()

static void rjpeg__build_fast_ac ( int16_t *  fast_ac, rjpeg__huffman *  h  )

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rjpeg__build_huffman()

static int rjpeg__build_huffman ( rjpeg__huffman *  h, int *  count  )

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rjpeg__clamp()

static INLINE uint8_t rjpeg__clamp ( int  x )

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rjpeg__cleanup_jpeg()

static void rjpeg__cleanup_jpeg ( rjpeg__jpeg *  j )

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rjpeg__decode_jpeg_header()

static int rjpeg__decode_jpeg_header ( rjpeg__jpeg *  z, int  scan  )

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rjpeg__decode_jpeg_image()

static int rjpeg__decode_jpeg_image ( rjpeg__jpeg *  j )

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rjpeg__extend_receive()

static INLINE int rjpeg__extend_receive ( rjpeg__jpeg *  j, int  n  )

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rjpeg__get8()

static INLINE uint8_t rjpeg__get8 ( rjpeg__context *  s )

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rjpeg__get_marker()

static uint8_t rjpeg__get_marker ( rjpeg__jpeg *  j )

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rjpeg__grow_buffer_unsafe()

static void rjpeg__grow_buffer_unsafe ( rjpeg__jpeg *  j )

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rjpeg__idct_block()

static void rjpeg__idct_block ( uint8_t *  out, int  out_stride, short  data[64]  )

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rjpeg__jpeg_decode_block()

static int rjpeg__jpeg_decode_block ( rjpeg__jpeg *  j, short  data[64], rjpeg__huffman *  hdc, rjpeg__huffman *  hac, int16_t *  fac, int  b, uint8_t *  dequant  )

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rjpeg__jpeg_decode_block_prog_ac()

static int rjpeg__jpeg_decode_block_prog_ac ( rjpeg__jpeg *  j, short  data[64], rjpeg__huffman *  hac, int16_t *  fac  )

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rjpeg__jpeg_decode_block_prog_dc()

static int rjpeg__jpeg_decode_block_prog_dc ( rjpeg__jpeg *  j, short  data[64], rjpeg__huffman *  hdc, int  b  )

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rjpeg__jpeg_dequantize()

static void rjpeg__jpeg_dequantize ( short *  data, uint8_t *  dequant  )

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rjpeg__jpeg_finish()

static void rjpeg__jpeg_finish ( rjpeg__jpeg *  z )

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rjpeg__jpeg_get_bit()

static INLINE int rjpeg__jpeg_get_bit ( rjpeg__jpeg *  j )

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rjpeg__jpeg_get_bits()

static INLINE int rjpeg__jpeg_get_bits ( rjpeg__jpeg *  j, int  n  )

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rjpeg__jpeg_huff_decode()

static INLINE int rjpeg__jpeg_huff_decode ( rjpeg__jpeg *  j, rjpeg__huffman *  h  )

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rjpeg__jpeg_reset()

static void rjpeg__jpeg_reset ( rjpeg__jpeg *  j )

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rjpeg__parse_entropy_coded_data()

static int rjpeg__parse_entropy_coded_data ( rjpeg__jpeg *  z )

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rjpeg__process_frame_header()

static int rjpeg__process_frame_header ( rjpeg__jpeg *  z, int  scan  )

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rjpeg__process_marker()

static int rjpeg__process_marker ( rjpeg__jpeg *  z, int  m  )

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rjpeg__process_scan_header()

static int rjpeg__process_scan_header ( rjpeg__jpeg *  z )

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rjpeg__resample_row_generic()

static uint8_t* rjpeg__resample_row_generic ( uint8_t *  out, uint8_t *  in_near, uint8_t *  in_far, int  w, int  hs  )

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rjpeg__resample_row_h_2()

static uint8_t* rjpeg__resample_row_h_2 ( uint8_t *  out, uint8_t *  in_near, uint8_t *  in_far, int  w, int  hs  )

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rjpeg__resample_row_hv_2()

static uint8_t* rjpeg__resample_row_hv_2 ( uint8_t *  out, uint8_t *  in_near, uint8_t *  in_far, int  w, int  hs  )

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rjpeg__resample_row_v_2()

static uint8_t* rjpeg__resample_row_v_2 ( uint8_t *  out, uint8_t *  in_near, uint8_t *  in_far, int  w, int  hs  )

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rjpeg__setup_jpeg()

static void rjpeg__setup_jpeg ( rjpeg__jpeg *  j )

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rjpeg__YCbCr_to_RGB_row()

static void rjpeg__YCbCr_to_RGB_row ( uint8_t *  out, const uint8_t *  y, const uint8_t *  pcb, const uint8_t *  pcr, int  count, int  step  )

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rjpeg_alloc()

rjpeg_t* rjpeg_alloc

(

void

)

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rjpeg_free()

void rjpeg_free

(

rjpeg_t *

rjpeg

)

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rjpeg_load_from_memory()

static uint8_t* rjpeg_load_from_memory ( const uint8_t *  buffer, int  len, unsigned *  x, unsigned *  y, int *  comp, int  req_comp  )

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rjpeg_load_jpeg_image()

static uint8_t* rjpeg_load_jpeg_image ( rjpeg__jpeg *  z, unsigned *  out_x, unsigned *  out_y, int *  comp, int  req_comp  )

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rjpeg_process_image()

int rjpeg_process_image	(	rjpeg_t *	rjpeg,
		void **	buf_data,
		size_t	size,
		unsigned *	width,
		unsigned *	height
	)

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rjpeg_resample_row_1()

static uint8_t* rjpeg_resample_row_1 ( uint8_t *  out, uint8_t *  in_near, uint8_t *  in_far, int  w, int  hs  )

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rjpeg_set_buf_ptr()

bool rjpeg_set_buf_ptr	(	rjpeg_t *	rjpeg,
		void *	data
	)

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Variable Documentation

rjpeg__bmask

uint32_t rjpeg__bmask[17] ={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535}

static

rjpeg__jbias

int const rjpeg__jbias[16] = {0,-1,-3,-7,-15,-31,-63,-127,-255,-511,-1023,-2047,-4095,-8191,-16383,-32767}

static

rjpeg__jpeg_dezigzag

uint8_t rjpeg__jpeg_dezigzag[64+15]

static

Initial value:

=
{
 0, 1, 8, 16, 9, 2, 3, 10,
 17, 24, 32, 25, 18, 11, 4, 5,
 12, 19, 26, 33, 40, 48, 41, 34,
 27, 20, 13, 6, 7, 14, 21, 28,
 35, 42, 49, 56, 57, 50, 43, 36,
 29, 22, 15, 23, 30, 37, 44, 51,
 58, 59, 52, 45, 38, 31, 39, 46,
 53, 60, 61, 54, 47, 55, 62, 63,
 
 63, 63, 63, 63, 63, 63, 63, 63,
 63, 63, 63, 63, 63, 63, 63
}