FFmpeg  2.1.1
Data Structures | Macros | Enumerations | Functions | Variables
exr.c File Reference

OpenEXR decoder. More...

#include <zlib.h>
#include "get_bits.h"
#include "avcodec.h"
#include "bytestream.h"
#include "mathops.h"
#include "thread.h"
#include "libavutil/imgutils.h"
#include "libavutil/avassert.h"

Go to the source code of this file.

Data Structures

struct  EXRChannel
 
struct  EXRThreadData
 
struct  EXRContext
 
struct  HufDec
 

Macros

#define USHORT_RANGE   (1 << 16)
 
#define BITMAP_SIZE   (1 << 13)
 
#define HUF_ENCBITS   16
 
#define HUF_DECBITS   14
 
#define HUF_ENCSIZE   ((1 << HUF_ENCBITS) + 1)
 
#define HUF_DECSIZE   (1 << HUF_DECBITS)
 
#define HUF_DECMASK   (HUF_DECSIZE - 1)
 
#define SHORT_ZEROCODE_RUN   59
 
#define LONG_ZEROCODE_RUN   63
 
#define SHORTEST_LONG_RUN   (2 + LONG_ZEROCODE_RUN - SHORT_ZEROCODE_RUN)
 
#define LONGEST_LONG_RUN   (255 + SHORTEST_LONG_RUN)
 
#define get_char(c, lc, gb)
 
#define get_code(po, rlc, c, lc, gb, out, oe)
 
#define NBITS   16
 
#define A_OFFSET   (1 << (NBITS - 1))
 
#define MOD_MASK   ((1 << NBITS) - 1)
 

Enumerations

enum  ExrCompr {
  EXR_RAW = 0, EXR_RLE = 1, EXR_ZIP1 = 2, EXR_ZIP16 = 3,
  EXR_PIZ = 4, EXR_PXR24 = 5, EXR_B44 = 6, EXR_B44A = 7
}
 
enum  ExrPixelType { EXR_UINT, EXR_HALF, EXR_FLOAT }
 

Functions

static uint16_t exr_flt2uint (uint32_t v)
 Converts from 32-bit float as uint32_t to uint16_t. More...
 
static uint16_t exr_halflt2uint (uint16_t v)
 Converts from 16-bit float as uint16_t to uint16_t. More...
 
static unsigned int get_header_variable_length (const uint8_t **buf, const uint8_t *buf_end)
 Gets the size of the header variable. More...
 
static int check_header_variable (AVCodecContext *avctx, const uint8_t **buf, const uint8_t *buf_end, const char *value_name, const char *value_type, unsigned int minimum_length, unsigned int *variable_buffer_data_size)
 Checks if the variable name corresponds with it's data type. More...
 
static void predictor (uint8_t *src, int size)
 
static void reorder_pixels (uint8_t *src, uint8_t *dst, int size)
 
static int zip_uncompress (const uint8_t *src, int compressed_size, int uncompressed_size, EXRThreadData *td)
 
static int rle_uncompress (const uint8_t *src, int compressed_size, int uncompressed_size, EXRThreadData *td)
 
static uint16_t reverse_lut (const uint8_t *bitmap, uint16_t *lut)
 
static void apply_lut (const uint16_t *lut, uint16_t *dst, int dsize)
 
static void huf_canonical_code_table (uint64_t *hcode)
 
static int huf_unpack_enc_table (GetByteContext *gb, int32_t im, int32_t iM, uint64_t *hcode)
 
static int huf_build_dec_table (const uint64_t *hcode, int im, int iM, HufDec *hdecod)
 
static int huf_decode (const uint64_t *hcode, const HufDec *hdecod, GetByteContext *gb, int nbits, int rlc, int no, uint16_t *out)
 
static int huf_uncompress (GetByteContext *gb, uint16_t *dst, int dst_size)
 
static void wdec14 (uint16_t l, uint16_t h, uint16_t *a, uint16_t *b)
 
static void wdec16 (uint16_t l, uint16_t h, uint16_t *a, uint16_t *b)
 
static void wav_decode (uint16_t *in, int nx, int ox, int ny, int oy, uint16_t mx)
 
static int piz_uncompress (EXRContext *s, const uint8_t *src, int ssize, int dsize, EXRThreadData *td)
 
static int pxr24_uncompress (EXRContext *s, const uint8_t *src, int compressed_size, int uncompressed_size, EXRThreadData *td)
 
static int decode_block (AVCodecContext *avctx, void *tdata, int jobnr, int threadnr)
 
static int decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
 
static av_cold int decode_end (AVCodecContext *avctx)
 

Variables

AVCodec ff_exr_decoder
 

Detailed Description

OpenEXR decoder.

Author
Jimmy Christensen

For more information on the OpenEXR format, visit: http://openexr.com/

exr_flt2uint() and exr_halflt2uint() is credited to Reimar Döffinger

Definition in file exr.c.

Macro Definition Documentation

#define USHORT_RANGE   (1 << 16)

Definition at line 284 of file exr.c.

Referenced by reverse_lut().

#define BITMAP_SIZE   (1 << 13)

Definition at line 285 of file exr.c.

Referenced by piz_uncompress().

#define HUF_ENCBITS   16

Definition at line 311 of file exr.c.

#define HUF_DECBITS   14

Definition at line 312 of file exr.c.

Referenced by huf_build_dec_table(), and huf_decode().

#define HUF_ENCSIZE   ((1 << HUF_ENCBITS) + 1)

Definition at line 314 of file exr.c.

Referenced by huf_canonical_code_table(), and huf_uncompress().

#define HUF_DECSIZE   (1 << HUF_DECBITS)

Definition at line 315 of file exr.c.

Referenced by huf_uncompress().

#define HUF_DECMASK   (HUF_DECSIZE - 1)

Definition at line 316 of file exr.c.

Referenced by huf_decode().

#define SHORT_ZEROCODE_RUN   59

Definition at line 347 of file exr.c.

Referenced by huf_unpack_enc_table().

#define LONG_ZEROCODE_RUN   63

Definition at line 348 of file exr.c.

Referenced by huf_unpack_enc_table().

#define SHORTEST_LONG_RUN   (2 + LONG_ZEROCODE_RUN - SHORT_ZEROCODE_RUN)

Definition at line 349 of file exr.c.

Referenced by huf_unpack_enc_table().

#define LONGEST_LONG_RUN   (255 + SHORTEST_LONG_RUN)

Definition at line 350 of file exr.c.

#define get_char (   c,
  lc,
  gb 
)
Value:
{ \
c = (c << 8) | bytestream2_get_byte(gb); \
lc += 8; \
}
static double c[64]

Definition at line 428 of file exr.c.

Referenced by huf_decode().

#define get_code (   po,
  rlc,
  c,
  lc,
  gb,
  out,
  oe 
)
Value:
{ \
if (po == rlc) { \
if (lc < 8) \
get_char(c, lc, gb); \
lc -= 8; \
\
cs = c >> lc; \
if (out + cs > oe) \
\
s = out[-1]; \
\
while (cs-- > 0) \
*out++ = s; \
} else if (out < oe) { \
*out++ = po; \
} else { \
} \
}
const char * s
Definition: avisynth_c.h:668
if((e=av_dict_get(options,"", NULL, AV_DICT_IGNORE_SUFFIX)))
Definition: avfilter.c:965
#define get_char(c, lc, gb)
Definition: exr.c:428
return
static double c[64]
#define AVERROR_INVALIDDATA
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=av_sample_fmt_is_planar(in_fmt);out_planar=av_sample_fmt_is_planar(out_fmt);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);ff_audio_convert_init_arm(ac);ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out

Definition at line 433 of file exr.c.

Referenced by huf_decode().

#define NBITS   16

Definition at line 588 of file exr.c.

#define A_OFFSET   (1 << (NBITS - 1))

Definition at line 589 of file exr.c.

Referenced by wdec16().

#define MOD_MASK   ((1 << NBITS) - 1)

Definition at line 590 of file exr.c.

Referenced by wdec16().

Enumeration Type Documentation

enum ExrCompr
Enumerator
EXR_RAW 
EXR_RLE 
EXR_ZIP1 
EXR_ZIP16 
EXR_PIZ 
EXR_PXR24 
EXR_B44 
EXR_B44A 

Definition at line 43 of file exr.c.

Enumerator
EXR_UINT 
EXR_HALF 
EXR_FLOAT 

Definition at line 54 of file exr.c.

Function Documentation

static uint16_t exr_flt2uint ( uint32_t  v)
inlinestatic

Converts from 32-bit float as uint32_t to uint16_t.

Parameters
v32-bit float
Returns
normalized 16-bit unsigned int

Definition at line 108 of file exr.c.

Referenced by decode_block().

static uint16_t exr_halflt2uint ( uint16_t  v)
inlinestatic

Converts from 16-bit float as uint16_t to uint16_t.

Parameters
v16-bit float
Returns
normalized 16-bit unsigned int

Definition at line 127 of file exr.c.

Referenced by decode_block().

static unsigned int get_header_variable_length ( const uint8_t **  buf,
const uint8_t buf_end 
)
static

Gets the size of the header variable.

Parameters
**bufthe current pointer location in the header where the variable data starts
*buf_endpointer location of the end of the buffer
Returns
size of variable data

Definition at line 146 of file exr.c.

Referenced by check_header_variable(), and decode_frame().

static int check_header_variable ( AVCodecContext avctx,
const uint8_t **  buf,
const uint8_t buf_end,
const char *  value_name,
const char *  value_type,
unsigned int  minimum_length,
unsigned int *  variable_buffer_data_size 
)
static

Checks if the variable name corresponds with it's data type.

Parameters
*avctxthe AVCodecContext
**bufthe current pointer location in the header where the variable name starts
*buf_endpointer location of the end of the buffer
*value_namename of the varible to check
*value_typetype of the varible to check
minimum_lengthminimum length of the variable data
variable_buffer_data_sizevariable length read from the header after it's checked
Returns
negative if variable is invalid

Definition at line 169 of file exr.c.

Referenced by decode_frame().

static void predictor ( uint8_t src,
int  size 
)
static
static void reorder_pixels ( uint8_t src,
uint8_t dst,
int  size 
)
static

Definition at line 204 of file exr.c.

Referenced by rle_uncompress(), and zip_uncompress().

static int zip_uncompress ( const uint8_t src,
int  compressed_size,
int  uncompressed_size,
EXRThreadData td 
)
static

Definition at line 224 of file exr.c.

Referenced by decode_block().

static int rle_uncompress ( const uint8_t src,
int  compressed_size,
int  uncompressed_size,
EXRThreadData td 
)
static

Definition at line 239 of file exr.c.

Referenced by decode_block().

static uint16_t reverse_lut ( const uint8_t bitmap,
uint16_t *  lut 
)
static

Definition at line 287 of file exr.c.

Referenced by piz_uncompress().

static void apply_lut ( const uint16_t *  lut,
uint16_t *  dst,
int  dsize 
)
static

Definition at line 303 of file exr.c.

Referenced by piz_uncompress().

static void huf_canonical_code_table ( uint64_t *  hcode)
static

Definition at line 324 of file exr.c.

Referenced by huf_unpack_enc_table().

static int huf_unpack_enc_table ( GetByteContext gb,
int32_t  im,
int32_t  iM,
uint64_t *  hcode 
)
static

Definition at line 352 of file exr.c.

Referenced by huf_uncompress().

static int huf_build_dec_table ( const uint64_t *  hcode,
int  im,
int  iM,
HufDec hdecod 
)
static

Definition at line 391 of file exr.c.

Referenced by huf_uncompress().

static int huf_decode ( const uint64_t *  hcode,
const HufDec hdecod,
GetByteContext gb,
int  nbits,
int  rlc,
int  no,
uint16_t *  out 
)
static

Definition at line 455 of file exr.c.

Referenced by huf_uncompress().

static int huf_uncompress ( GetByteContext gb,
uint16_t *  dst,
int  dst_size 
)
static

Definition at line 523 of file exr.c.

Referenced by piz_uncompress().

static void wdec14 ( uint16_t  l,
uint16_t  h,
uint16_t *  a,
uint16_t *  b 
)
inlinestatic

Definition at line 575 of file exr.c.

Referenced by wav_decode().

static void wdec16 ( uint16_t  l,
uint16_t  h,
uint16_t *  a,
uint16_t *  b 
)
inlinestatic

Definition at line 592 of file exr.c.

Referenced by wav_decode().

static void wav_decode ( uint16_t *  in,
int  nx,
int  ox,
int  ny,
int  oy,
uint16_t  mx 
)
static

Definition at line 602 of file exr.c.

Referenced by piz_uncompress().

static int piz_uncompress ( EXRContext s,
const uint8_t src,
int  ssize,
int  dsize,
EXRThreadData td 
)
static

Definition at line 681 of file exr.c.

Referenced by decode_block().

static int pxr24_uncompress ( EXRContext s,
const uint8_t src,
int  compressed_size,
int  uncompressed_size,
EXRThreadData td 
)
static

Definition at line 739 of file exr.c.

Referenced by decode_block().

static int decode_block ( AVCodecContext avctx,
void tdata,
int  jobnr,
int  threadnr 
)
static

Definition at line 794 of file exr.c.

Referenced by decode_frame().

static int decode_frame ( AVCodecContext avctx,
void data,
int *  got_frame,
AVPacket avpkt 
)
static

Definition at line 914 of file exr.c.

static av_cold int decode_end ( AVCodecContext avctx)
static

Definition at line 1252 of file exr.c.

Variable Documentation

AVCodec ff_exr_decoder
Initial value:
= {
.name = "exr",
.long_name = NULL_IF_CONFIG_SMALL("OpenEXR image"),
.priv_data_size = sizeof(EXRContext),
}
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:742
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:151
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:538
static av_cold int decode_end(AVCodecContext *avctx)
Definition: exr.c:1252
#define CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:815
Definition: exr.c:76
#define CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:811
static int decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: crystalhd.c:868
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: exr.c:914

Definition at line 1272 of file exr.c.