diff options
Diffstat (limited to 'converter/other/jpeg2000/libjasper/jpc/jpc_bs.c')
| -rw-r--r-- | converter/other/jpeg2000/libjasper/jpc/jpc_bs.c | 528 |
1 files changed, 264 insertions, 264 deletions
diff --git a/converter/other/jpeg2000/libjasper/jpc/jpc_bs.c b/converter/other/jpeg2000/libjasper/jpc/jpc_bs.c index c66fcd99..3f693fff 100644 --- a/converter/other/jpeg2000/libjasper/jpc/jpc_bs.c +++ b/converter/other/jpeg2000/libjasper/jpc/jpc_bs.c @@ -6,14 +6,14 @@ */ /* __START_OF_JASPER_LICENSE__ - * + * * JasPer Software License - * + * * IMAGE POWER JPEG-2000 PUBLIC LICENSE * ************************************ - * + * * GRANT: - * + * * Permission is hereby granted, free of charge, to any person (the "User") * obtaining a copy of this software and associated documentation, to deal * in the JasPer Software without restriction, including without limitation @@ -21,22 +21,22 @@ * and/or sell copies of the JasPer Software (in source and binary forms), * and to permit persons to whom the JasPer Software is furnished to do so, * provided further that the License Conditions below are met. - * + * * License Conditions * ****************** - * + * * A. Redistributions of source code must retain the above copyright notice, * and this list of conditions, and the following disclaimer. - * + * * B. Redistributions in binary form must reproduce the above copyright * notice, and this list of conditions, and the following disclaimer in * the documentation and/or other materials provided with the distribution. - * + * * C. Neither the name of Image Power, Inc. nor any other contributor * (including, but not limited to, the University of British Columbia and * Michael David Adams) may be used to endorse or promote products derived * from this software without specific prior written permission. - * + * * D. User agrees that it shall not commence any action against Image Power, * Inc., the University of British Columbia, Michael David Adams, or any * other contributors (collectively "Licensors") for infringement of any @@ -56,17 +56,17 @@ * trade dress, or service mark rights); and (v) divisions, continuations, * renewals, reissues and extensions of the foregoing (as and to the extent * applicable) now existing, hereafter filed, issued or acquired. - * + * * E. If User commences an infringement action against any Licensor(s) then * such Licensor(s) shall have the right to terminate User's license and * all sublicenses that have been granted hereunder by User to other parties. - * + * * F. This software is for use only in hardware or software products that * are compliant with ISO/IEC 15444-1 (i.e., JPEG-2000 Part 1). No license * or right to this Software is granted for products that do not comply * with ISO/IEC 15444-1. The JPEG-2000 Part 1 standard can be purchased * from the ISO. - * + * * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. * NO USE OF THE JASPER SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER * THIS DISCLAIMER. THE JASPER SOFTWARE IS PROVIDED BY THE LICENSORS AND @@ -106,7 +106,7 @@ * TECHNOLOGY OR PRODUCTS FOR HIGH RISK ACTIVITIES AND WILL ENSURE THAT ITS * CUSTOMERS AND END-USERS OF ITS PRODUCTS ARE PROVIDED WITH A COPY OF THE * NOTICE SPECIFIED IN THIS SECTION. - * + * * __END_OF_JASPER_LICENSE__ */ @@ -137,66 +137,66 @@ /* Allocate a new bit stream. */ static jpc_bitstream_t *jpc_bitstream_alloc() { - jpc_bitstream_t *bitstream; - - /* Allocate memory for the new bit stream object. */ - if (!(bitstream = jas_malloc(sizeof(jpc_bitstream_t)))) { - return 0; - } - /* Initialize all of the data members. */ - bitstream->stream_ = 0; - bitstream->cnt_ = 0; - bitstream->flags_ = 0; - bitstream->openmode_ = 0; - - return bitstream; + jpc_bitstream_t *bitstream; + + /* Allocate memory for the new bit stream object. */ + if (!(bitstream = jas_malloc(sizeof(jpc_bitstream_t)))) { + return 0; + } + /* Initialize all of the data members. */ + bitstream->stream_ = 0; + bitstream->cnt_ = 0; + bitstream->flags_ = 0; + bitstream->openmode_ = 0; + + return bitstream; } /* Open a bit stream from a stream. */ jpc_bitstream_t *jpc_bitstream_sopen(jas_stream_t *stream, const char *mode) { - jpc_bitstream_t *bitstream; + jpc_bitstream_t *bitstream; - if (!(bitstream = jpc_bitstream_alloc())) { - return 0; - } + if (!(bitstream = jpc_bitstream_alloc())) { + return 0; + } - /* By default, do not close the underlying (character) stream, upon - the close of the bit stream. */ - bitstream->flags_ = JPC_BITSTREAM_NOCLOSE; + /* By default, do not close the underlying (character) stream, upon + the close of the bit stream. */ + bitstream->flags_ = JPC_BITSTREAM_NOCLOSE; - bitstream->stream_ = stream; - bitstream->openmode_ = (mode[0] == 'w') ? JPC_BITSTREAM_WRITE : - JPC_BITSTREAM_READ; + bitstream->stream_ = stream; + bitstream->openmode_ = (mode[0] == 'w') ? JPC_BITSTREAM_WRITE : + JPC_BITSTREAM_READ; - /* Mark the data buffer as empty. */ - bitstream->cnt_ = (bitstream->openmode_ == JPC_BITSTREAM_READ) ? 0 : 8; - bitstream->buf_ = 0; + /* Mark the data buffer as empty. */ + bitstream->cnt_ = (bitstream->openmode_ == JPC_BITSTREAM_READ) ? 0 : 8; + bitstream->buf_ = 0; - return bitstream; + return bitstream; } /* Close a bit stream. */ int jpc_bitstream_close(jpc_bitstream_t *bitstream) { - int ret = 0; - - /* Align to the next byte boundary while considering the effects of - bit stuffing. */ - if (jpc_bitstream_align(bitstream)) { - ret = -1; - } - - /* If necessary, close the underlying (character) stream. */ - if (!(bitstream->flags_ & JPC_BITSTREAM_NOCLOSE) && bitstream->stream_) { - if (jas_stream_close(bitstream->stream_)) { - ret = -1; - } - bitstream->stream_ = 0; - } - - jas_free(bitstream); - return ret; + int ret = 0; + + /* Align to the next byte boundary while considering the effects of + bit stuffing. */ + if (jpc_bitstream_align(bitstream)) { + ret = -1; + } + + /* If necessary, close the underlying (character) stream. */ + if (!(bitstream->flags_ & JPC_BITSTREAM_NOCLOSE) && bitstream->stream_) { + if (jas_stream_close(bitstream->stream_)) { + ret = -1; + } + bitstream->stream_ = 0; + } + + jas_free(bitstream); + return ret; } /******************************************************************************\ @@ -206,64 +206,64 @@ int jpc_bitstream_close(jpc_bitstream_t *bitstream) /* Get a bit from a bit stream. */ int jpc_bitstream_getbit_func(jpc_bitstream_t *bitstream) { - int ret; - JAS_DBGLOG(1000, ("jpc_bitstream_getbit_func(%p)\n", bitstream)); - ret = jpc_bitstream_getbit_macro(bitstream); - JAS_DBGLOG(1000, ("jpc_bitstream_getbit_func -> %d\n", ret)); - return ret; + int ret; + JAS_DBGLOG(1000, ("jpc_bitstream_getbit_func(%p)\n", bitstream)); + ret = jpc_bitstream_getbit_macro(bitstream); + JAS_DBGLOG(1000, ("jpc_bitstream_getbit_func -> %d\n", ret)); + return ret; } /* Put a bit to a bit stream. */ int jpc_bitstream_putbit_func(jpc_bitstream_t *bitstream, int b) { - int ret; - JAS_DBGLOG(1000, ("jpc_bitstream_putbit_func(%p, %d)\n", bitstream, b)); - ret = jpc_bitstream_putbit_macro(bitstream, b); - JAS_DBGLOG(1000, ("jpc_bitstream_putbit_func() -> %d\n", ret)); - return ret; + int ret; + JAS_DBGLOG(1000, ("jpc_bitstream_putbit_func(%p, %d)\n", bitstream, b)); + ret = jpc_bitstream_putbit_macro(bitstream, b); + JAS_DBGLOG(1000, ("jpc_bitstream_putbit_func() -> %d\n", ret)); + return ret; } /* Get one or more bits from a bit stream. */ long jpc_bitstream_getbits(jpc_bitstream_t *bitstream, int n) { - long v; - int u; - - /* We can reliably get at most 31 bits since ISO/IEC 9899 only - guarantees that a long can represent values up to 2^31-1. */ - assert(n >= 0 && n < 32); - - /* Get the number of bits requested from the specified bit stream. */ - v = 0; - while (--n >= 0) { - if ((u = jpc_bitstream_getbit(bitstream)) < 0) { - return -1; - } - v = (v << 1) | u; - } - return v; + long v; + int u; + + /* We can reliably get at most 31 bits since ISO/IEC 9899 only + guarantees that a long can represent values up to 2^31-1. */ + assert(n >= 0 && n < 32); + + /* Get the number of bits requested from the specified bit stream. */ + v = 0; + while (--n >= 0) { + if ((u = jpc_bitstream_getbit(bitstream)) < 0) { + return -1; + } + v = (v << 1) | u; + } + return v; } /* Put one or more bits to a bit stream. */ int jpc_bitstream_putbits(jpc_bitstream_t *bitstream, int n, long v) { - int m; - - /* We can reliably put at most 31 bits since ISO/IEC 9899 only - guarantees that a long can represent values up to 2^31-1. */ - assert(n >= 0 && n < 32); - /* Ensure that only the bits to be output are nonzero. */ - assert(!(v & (~JAS_ONES(n)))); - - /* Put the desired number of bits to the specified bit stream. */ - m = n - 1; - while (--n >= 0) { - if (jpc_bitstream_putbit(bitstream, (v >> m) & 1) == EOF) { - return EOF; - } - v <<= 1; - } - return 0; + int m; + + /* We can reliably put at most 31 bits since ISO/IEC 9899 only + guarantees that a long can represent values up to 2^31-1. */ + assert(n >= 0 && n < 32); + /* Ensure that only the bits to be output are nonzero. */ + assert(!(v & (~JAS_ONES(n)))); + + /* Put the desired number of bits to the specified bit stream. */ + m = n - 1; + while (--n >= 0) { + if (jpc_bitstream_putbit(bitstream, (v >> m) & 1) == EOF) { + return EOF; + } + v <<= 1; + } + return 0; } /******************************************************************************\ @@ -273,30 +273,30 @@ int jpc_bitstream_putbits(jpc_bitstream_t *bitstream, int n, long v) /* Fill the buffer for a bit stream. */ int jpc_bitstream_fillbuf(jpc_bitstream_t *bitstream) { - int c; - /* Note: The count has already been decremented by the caller. */ - assert(bitstream->openmode_ & JPC_BITSTREAM_READ); - assert(bitstream->cnt_ <= 0); - - if (bitstream->flags_ & JPC_BITSTREAM_ERR) { - bitstream->cnt_ = 0; - return -1; - } - - if (bitstream->flags_ & JPC_BITSTREAM_EOF) { - bitstream->buf_ = 0x7f; - bitstream->cnt_ = 7; - return 1; - } - - bitstream->buf_ = (bitstream->buf_ << 8) & 0xffff; - if ((c = jas_stream_getc((bitstream)->stream_)) == EOF) { - bitstream->flags_ |= JPC_BITSTREAM_EOF; - return 1; - } - bitstream->cnt_ = (bitstream->buf_ == 0xff00) ? 6 : 7; - bitstream->buf_ |= c & ((1 << (bitstream->cnt_ + 1)) - 1); - return (bitstream->buf_ >> bitstream->cnt_) & 1; + int c; + /* Note: The count has already been decremented by the caller. */ + assert(bitstream->openmode_ & JPC_BITSTREAM_READ); + assert(bitstream->cnt_ <= 0); + + if (bitstream->flags_ & JPC_BITSTREAM_ERR) { + bitstream->cnt_ = 0; + return -1; + } + + if (bitstream->flags_ & JPC_BITSTREAM_EOF) { + bitstream->buf_ = 0x7f; + bitstream->cnt_ = 7; + return 1; + } + + bitstream->buf_ = (bitstream->buf_ << 8) & 0xffff; + if ((c = jas_stream_getc((bitstream)->stream_)) == EOF) { + bitstream->flags_ |= JPC_BITSTREAM_EOF; + return 1; + } + bitstream->cnt_ = (bitstream->buf_ == 0xff00) ? 6 : 7; + bitstream->buf_ |= c & ((1 << (bitstream->cnt_ + 1)) - 1); + return (bitstream->buf_ >> bitstream->cnt_) & 1; } @@ -308,167 +308,167 @@ int jpc_bitstream_fillbuf(jpc_bitstream_t *bitstream) the effects of bit stuffing)? */ int jpc_bitstream_needalign(jpc_bitstream_t *bitstream) { - if (bitstream->openmode_ & JPC_BITSTREAM_READ) { - /* The bit stream is open for reading. */ - /* If there are any bits buffered for reading, or the - previous byte forced a stuffed bit, alignment is - required. */ - if ((bitstream->cnt_ < 8 && bitstream->cnt_ > 0) || - ((bitstream->buf_ >> 8) & 0xff) == 0xff) { - return 1; - } - } else if (bitstream->openmode_ & JPC_BITSTREAM_WRITE) { - /* The bit stream is open for writing. */ - /* If there are any bits buffered for writing, or the - previous byte forced a stuffed bit, alignment is - required. */ - if ((bitstream->cnt_ < 8 && bitstream->cnt_ >= 0) || - ((bitstream->buf_ >> 8) & 0xff) == 0xff) { - return 1; - } - } else { - /* This should not happen. Famous last words, eh? :-) */ - assert(0); - return -1; - } - return 0; + if (bitstream->openmode_ & JPC_BITSTREAM_READ) { + /* The bit stream is open for reading. */ + /* If there are any bits buffered for reading, or the + previous byte forced a stuffed bit, alignment is + required. */ + if ((bitstream->cnt_ < 8 && bitstream->cnt_ > 0) || + ((bitstream->buf_ >> 8) & 0xff) == 0xff) { + return 1; + } + } else if (bitstream->openmode_ & JPC_BITSTREAM_WRITE) { + /* The bit stream is open for writing. */ + /* If there are any bits buffered for writing, or the + previous byte forced a stuffed bit, alignment is + required. */ + if ((bitstream->cnt_ < 8 && bitstream->cnt_ >= 0) || + ((bitstream->buf_ >> 8) & 0xff) == 0xff) { + return 1; + } + } else { + /* This should not happen. Famous last words, eh? :-) */ + assert(0); + return -1; + } + return 0; } /* How many additional bytes would be output if we align the bit stream? */ int jpc_bitstream_pending(jpc_bitstream_t *bitstream) { - if (bitstream->openmode_ & JPC_BITSTREAM_WRITE) { - /* The bit stream is being used for writing. */ + if (bitstream->openmode_ & JPC_BITSTREAM_WRITE) { + /* The bit stream is being used for writing. */ #if 1 - /* XXX - Is this really correct? Check someday... */ - if (bitstream->cnt_ < 8) { - return 1; - } + /* XXX - Is this really correct? Check someday... */ + if (bitstream->cnt_ < 8) { + return 1; + } #else - if (bitstream->cnt_ < 8) { - if (((bitstream->buf_ >> 8) & 0xff) == 0xff) { - return 2; - } - return 1; - } + if (bitstream->cnt_ < 8) { + if (((bitstream->buf_ >> 8) & 0xff) == 0xff) { + return 2; + } + return 1; + } #endif - return 0; - } else { - /* This operation should not be invoked on a bit stream that - is being used for reading. */ - return -1; - } + return 0; + } else { + /* This operation should not be invoked on a bit stream that + is being used for reading. */ + return -1; + } } /* Align the bit stream to a byte boundary. */ int jpc_bitstream_align(jpc_bitstream_t *bitstream) { - int ret; - if (bitstream->openmode_ & JPC_BITSTREAM_READ) { - ret = jpc_bitstream_inalign(bitstream, 0, 0); - } else if (bitstream->openmode_ & JPC_BITSTREAM_WRITE) { - ret = jpc_bitstream_outalign(bitstream, 0); - } - return ret; + int ret; + if (bitstream->openmode_ & JPC_BITSTREAM_READ) { + ret = jpc_bitstream_inalign(bitstream, 0, 0); + } else if (bitstream->openmode_ & JPC_BITSTREAM_WRITE) { + ret = jpc_bitstream_outalign(bitstream, 0); + } + return ret; } /* Align a bit stream in the input case. */ int jpc_bitstream_inalign(jpc_bitstream_t *bitstream, int fillmask, int filldata) { - int n; - int v; - int u; - int numfill; - int m; - - numfill = 7; - m = 0; - v = 0; - if (bitstream->cnt_ > 0) { - n = bitstream->cnt_; - } else if (!bitstream->cnt_) { - n = ((bitstream->buf_ & 0xff) == 0xff) ? 7 : 0; - } else { - n = 0; - } - if (n > 0) { - if ((u = jpc_bitstream_getbits(bitstream, n)) < 0) { - return -1; - } - m += n; - v = (v << n) | u; - } - if ((bitstream->buf_ & 0xff) == 0xff) { - if ((u = jpc_bitstream_getbits(bitstream, 7)) < 0) { - return -1; - } - v = (v << 7) | u; - m += 7; - } - if (m > numfill) { - v >>= m - numfill; - } else { - filldata >>= numfill - m; - fillmask >>= numfill - m; - } - if (((~(v ^ filldata)) & fillmask) != fillmask) { - /* The actual fill pattern does not match the expected one. */ - return 1; - } - - return 0; + int n; + int v; + int u; + int numfill; + int m; + + numfill = 7; + m = 0; + v = 0; + if (bitstream->cnt_ > 0) { + n = bitstream->cnt_; + } else if (!bitstream->cnt_) { + n = ((bitstream->buf_ & 0xff) == 0xff) ? 7 : 0; + } else { + n = 0; + } + if (n > 0) { + if ((u = jpc_bitstream_getbits(bitstream, n)) < 0) { + return -1; + } + m += n; + v = (v << n) | u; + } + if ((bitstream->buf_ & 0xff) == 0xff) { + if ((u = jpc_bitstream_getbits(bitstream, 7)) < 0) { + return -1; + } + v = (v << 7) | u; + m += 7; + } + if (m > numfill) { + v >>= m - numfill; + } else { + filldata >>= numfill - m; + fillmask >>= numfill - m; + } + if (((~(v ^ filldata)) & fillmask) != fillmask) { + /* The actual fill pattern does not match the expected one. */ + return 1; + } + + return 0; } /* Align a bit stream in the output case. */ int jpc_bitstream_outalign(jpc_bitstream_t *bitstream, int filldata) { - int n; - int v; - - /* Ensure that this bit stream is open for writing. */ - assert(bitstream->openmode_ & JPC_BITSTREAM_WRITE); - - /* Ensure that the first bit of fill data is zero. */ - /* Note: The first bit of fill data must be zero. If this were not - the case, the fill data itself could cause further bit stuffing to - be required (which would cause numerous complications). */ - assert(!(filldata & (~0x3f))); - - if (!bitstream->cnt_) { - if ((bitstream->buf_ & 0xff) == 0xff) { - n = 7; - v = filldata; - } else { - n = 0; - v = 0; - } - } else if (bitstream->cnt_ > 0 && bitstream->cnt_ < 8) { - n = bitstream->cnt_; - v = filldata >> (7 - n); - } else { - n = 0; - v = 0; - return 0; - } - - /* Write the appropriate fill data to the bit stream. */ - if (n > 0) { - if (jpc_bitstream_putbits(bitstream, n, v)) { - return -1; - } - } - if (bitstream->cnt_ < 8) { - assert(bitstream->cnt_ >= 0 && bitstream->cnt_ < 8); - assert((bitstream->buf_ & 0xff) != 0xff); - /* Force the pending byte of output to be written to the - underlying (character) stream. */ - if (jas_stream_putc(bitstream->stream_, bitstream->buf_ & 0xff) == EOF) { - return -1; - } - bitstream->cnt_ = 8; - bitstream->buf_ = (bitstream->buf_ << 8) & 0xffff; - } - - return 0; + int n; + int v; + + /* Ensure that this bit stream is open for writing. */ + assert(bitstream->openmode_ & JPC_BITSTREAM_WRITE); + + /* Ensure that the first bit of fill data is zero. */ + /* Note: The first bit of fill data must be zero. If this were not + the case, the fill data itself could cause further bit stuffing to + be required (which would cause numerous complications). */ + assert(!(filldata & (~0x3f))); + + if (!bitstream->cnt_) { + if ((bitstream->buf_ & 0xff) == 0xff) { + n = 7; + v = filldata; + } else { + n = 0; + v = 0; + } + } else if (bitstream->cnt_ > 0 && bitstream->cnt_ < 8) { + n = bitstream->cnt_; + v = filldata >> (7 - n); + } else { + n = 0; + v = 0; + return 0; + } + + /* Write the appropriate fill data to the bit stream. */ + if (n > 0) { + if (jpc_bitstream_putbits(bitstream, n, v)) { + return -1; + } + } + if (bitstream->cnt_ < 8) { + assert(bitstream->cnt_ >= 0 && bitstream->cnt_ < 8); + assert((bitstream->buf_ & 0xff) != 0xff); + /* Force the pending byte of output to be written to the + underlying (character) stream. */ + if (jas_stream_putc(bitstream->stream_, bitstream->buf_ & 0xff) == EOF) { + return -1; + } + bitstream->cnt_ = 8; + bitstream->buf_ = (bitstream->buf_ << 8) & 0xffff; + } + + return 0; } |