This was removed erroneously in
046f081b46. This define still is
necessary for getting MAP_ANONYMOUS defined on linux/glibc,
despite the define reshuffling done in that commit.
Without MAP_ANONYMOUS defined, the mprotect calls for setting the
generated mmx2 scaler code pages executable are left out, causing
crashes if that codepath is chosen.
This patch fixes scaling from 192x144 to 320x240 with
-sws_flags fast_bilinear, which crashes on linux at the
moment.
Signed-off-by: Martin Storsjö <martin@martin.st>
libswscale/utils.c:941:13: warning: passing argument 5 of ‘initMMX2HScaler’ from incompatible pointer type
libswscale/utils.c:524:12: note: expected ‘int32_t *’ but argument is of type ‘int16_t *’
libswscale/utils.c:942:13: warning: passing argument 5 of ‘initMMX2HScaler’ from incompatible pointer type
libswscale/utils.c:524:12: note: expected ‘int32_t *’ but argument is of type ‘int16_t *’
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Altivec does unaligned reads from this buffer in
hscale_altivec_real(), and can thus read up to 16 bytes beyond
the end of the buffer. Therefore, add an extra 16 bytes of
padding at the end of the conversion buffer.
This fixes fate-lavfi-pixfmts_scale on AltiVec-enabled builds
under valgrind.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
* qatar/master:
http: Remove the custom function for disabling chunked posts
rtsp: Disable chunked http post through AVOptions
movdec: Set frame_size for AMR
h264_weight: remove duplication functions.
swscale: align vertical filtersize by 2 on x86.
libavfilter: reindent.
matroskadec: empty blocks are in fact valid.
avfilter: don't abort() on zero-size allocations.
h264: improve calculation of codec delay.
movenc: Set a correct packet size for AMR-NB mode 15, "no data"
avformat: Add functions for doing global network initialization
avformat: Add the https protocol
avformat: Add the tls protocol, using OpenSSL or gnutls
avformat: Initialize gnutls in ff_tls_init()
w32threads: Wrap the mutex functions in inline functions returning int
configure: Allow linking to the gnutls library
avformat: Add ff_tls_init()/deinit() that initialize OpenSSL
configure: Allow linking to openssl
avcodec: Allow locking and unlocking an avformat specific mutex
avformat: Split out functions from network.h to a new file, network.c
Conflicts:
Changelog
configure
doc/APIchanges
libavcodec/internal.h
libavcodec/version.h
libavfilter/formats.c
libavformat/matroskadec.c
libavformat/mov.c
libavformat/version.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* qatar/master: (35 commits)
flvdec: Do not call parse_keyframes_index with a NULL stream
libspeexdec: include system headers before local headers
libspeexdec: return meaningful error codes
libspeexdec: cosmetics: reindent
libspeexdec: decode one frame at a time.
swscale: fix signed shift overflows in ff_yuv2rgb_c_init_tables()
Move timefilter code from lavf to lavd.
mov: add support for hdvd and pgapmetadata atoms
mov: rename function _stik, some indentation cosmetics
mov: rename function _int8 to remove ambiguity, some indentation cosmetics
mov: parse the gnre atom
mp3on4: check for allocation failures in decode_init_mp3on4()
mp3on4: create a separate flush function for MP3onMP4.
mp3on4: ensure that the frame channel count does not exceed the codec channel count.
mp3on4: set channel layout
mp3on4: fix the output channel order
mp3on4: allocate temp buffer with av_malloc() instead of on the stack.
mp3on4: copy MPADSPContext from first context to all contexts.
fmtconvert: port float_to_int16_interleave() 2-channel x86 inline asm to yasm
fmtconvert: port int32_to_float_fmul_scalar() x86 inline asm to yasm
...
Conflicts:
libavcodec/arm/h264dsp_init_arm.c
libavcodec/h264.c
libavcodec/h264.h
libavcodec/h264_cabac.c
libavcodec/h264_cavlc.c
libavcodec/h264_ps.c
libavcodec/h264dsp_template.c
libavcodec/h264idct_template.c
libavcodec/h264pred.c
libavcodec/h264pred_template.c
libavcodec/x86/h264dsp_mmx.c
libavdevice/Makefile
libavdevice/jack_audio.c
libavformat/Makefile
libavformat/flvdec.c
libavformat/flvenc.c
libavutil/pixfmt.h
libswscale/utils.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* qatar/master:
swscale: fix byte overreads in SSE-optimized hscale().
matroskadec: fix typo.
matroskadec: bail on parsing of incorrect seek index segments
Merged-by: Michael Niedermayer <michaelni@gmx.at>
SSE-optimized hScale() scales up to 4 pixels at once, so we need to
allocate up to 3 padding pixels to prevent overreads. This fixes
valgrind errors in various swscale-tests on fate.
* qatar/master:
swscale: add dithering to yuv2yuvX_altivec_real
rv34: free+allocate buffer instead of reallocating it to preserve alignment
h264: add missing brackets.
swscale: use 15-bit intermediates for 9/10-bit scaling.
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* qatar/master:
lsws: remove optimization debug logs in sws_init_context()
lsws: use array for storing the supported in/out information
Conflicts:
libswscale/utils.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
The logged information is possibly false, and it tends to be outdated
after each change since the logging code needs to be manually updated.
Simplify and prevent confusing wrong debug messages.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Also remove the unnecessary isSupportedIn/Out macros.
Make the code more compact/readable, and simplify the access to
lsws-specific pixel format information.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
* qatar/master:
rv30: return AVERROR(EINVAL) instead of EINVAL
build: add -L flags before existing LDFLAGS
simple_idct: whitespace cosmetics
simple_idct: make repeated code a macro
dsputil: remove huge #if 0 block
simple_idct: change 10-bit add/put stride from pixels to bytes
dsputil: allow 9/10-bit functions for non-h264 codecs
dnxhd: rename some data tables
dnxhdenc: remove inline from function only called through pointer
dnxhdenc: whitespace cosmetics
swscale: mark YUV422P10(LE,BE) as supported for output
configure: add -xc99 to LDFLAGS for Sun CC
Remove unused and non-compiling vestigial g729 decoder
Remove unused code under G729_BITEXACT #ifdef.
mpegvideo: fix invalid picture unreferencing.
dsputil: Remove extra blank line at end.
dsputil: Replace a LONG_MAX check with HAVE_FAST_64BIT.
simple_idct: add 10-bit version
Conflicts:
Makefile
libavcodec/g729data.h
libavcodec/g729dec.c
libavcodec/rv30.c
tests/ref/lavfi/pixdesc
tests/ref/lavfi/pixfmts_copy
tests/ref/lavfi/pixfmts_null
tests/ref/lavfi/pixfmts_scale
tests/ref/lavfi/pixfmts_vflip
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* qatar/master:
configure: Automatically add more flags required on symbian
mem.h: switch doxygen parameter order to match function prototype
doxygen: replace @sa tag by the more readable but equivalent @see
doxygen: use Doxygen markup for authors and web links where appropriate
doxygen: do not include license boilerplate in Doxygen documentation
ac3enc: Mark AVClasses const
ffserver: Replace two loops with one loop.
ffmpeg: Fix the check for experimental codecs
swscale: extend mmx padding.
swscale: clip unscaled colorspace conversion path.
doxygen: misc consistency cosmetics
doc: remove file name from @file directive in Doxygen usage example
doxygen: consistently place brief description
doxygen: place empty line between brief description and detailed description
avformat_open_input(): Add braces to shut up gcc warning.
Conflicts:
libavcodec/8svx.c
libavcodec/tiff.c
libavcodec/tiff.h
libavcodec/vaapi_h264.c
libavcodec/vorbis.c
libavcodec/vorbisdec.c
libavcodec/vp6.c
libswscale/swscale_unscaled.c
libswscale/utils.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* qatar/master:
APIchanges: fill in missing hashes and dates.
Add an APIChanges entry and bump minor versions for recent changes.
ffmpeg: print the low bitrate warning after the codec is openend.
doxygen: Move function documentation into the macro generating the function.
doxygen: Make sure parameter names match between .c and .h files.
h264: move fill_decode_neighbors()/fill_decode_caches() to h264_mvpred.h
H.264: Add more x86 assembly for 10-bit H.264 predict functions
lavf: fix invalid reads in avformat_find_stream_info()
cmdutils: replace opt_default with opt_default2() and remove set_context_opts
ffmpeg: use new avcodec_open2 and avformat_find_stream_info API.
ffplay: use new avcodec_open2 and avformat_find_stream_info API.
cmdutils: store all codec options in one dict instead of video/audio/sub
ffmpeg: check experimental flag after codec is opened.
ffmpeg: do not set GLOBAL_HEADER flag in the options context
Conflicts:
cmdutils.c
doc/APIchanges
ffmpeg.c
ffplay.c
libavcodec/version.h
libavformat/version.h
libswscale/swscale_unscaled.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* qatar/master: (21 commits)
swscale: Add Doxygen for hyscale_fast/hScale.
fate: enable lavfi-pixmt tests on big endian systems
PPC: swscale: disable altivec functions for unsupported formats
fate: merge identical pixdesc_be/le tests
swscale: Add Doxygen for yuv2planar*/yuv2packed* functions.
build: call texi2pod.pl with full path instead of symlink
build: include sub-makefiles using full path instead of symlinks
swscale: update big endian reference values after dff5a835.
wavpack: skip blocks with no samples
cosmetics: remove outdated comment that is no longer true
build: replace some addprefix/addsuffix with substitution refs
avutil: Remove unused arbitrary precision integer code.
configure: Drop check for availability of ten assembler operands.
aacenc: Save channel configuration for later use.
aacenc: Fix codebook trellising for zeroed bands.
swscale: change prototypes of scaled YUV output functions.
swscale: re-add support for non-native endianness.
swscale: disentangle yuv2rgbX_c_full() into small functions.
swscale: split yuv2packed[12X]_c() remainders into small functions.
swscale: split yuv2packedX_altivec in smaller functions.
...
Conflicts:
Makefile
configure
libavcodec/x86/dsputil_mmx.c
libavfilter/Makefile
libavformat/Makefile
libavutil/integer.c
libavutil/integer.h
libswscale/swscale.c
libswscale/swscale_internal.h
libswscale/x86/swscale_template.c
tests/ref/lavfi/pixdesc_le
tests/ref/lavfi/pixfmts_scale
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* qatar/master:
ac3enc: use correct alignment and length in channel coupling dsp functions.
ffmpeg: don't abuse a global for passing framerate from input to output
ffmpeg: don't abuse a global for passing channels from input to output
ffmpeg: don't abuse a global for passing samplerate from input to output
ARM: update ff_h264_idct8_add4_neon for 4:4:4 changes
swscale: use SwsContext for av_log when available
swscale: Remove HAVE_MMX from files that are only compiled with MMX enabled.
swscale: Fix compilation with --disable-mmx2.
Conflicts:
ffmpeg.c
libswscale/utils.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* qatar/master:
bitstream: Properly promote av_reverse values before shifting.
libavutil/swscale: YUV444P10/YUV444P9 support.
H.264: Fix high bit depth explicit biweight
h264: Fix 10-bit H.264 x86 chroma v loopfilter asm.
Replace DEBUG_SEEK/DEBUG_SI + av_log combinations by av_dlog.
Update copyright year for ac3enc_opts_template.c.
adts: Adjust frame size mask to follow the specification.
movenc: Add RTP muxer/hinter options
movenc: Pass the RTP AVFormatContext to the SDP generation
rtspenc: Add RTP muxer options
rtspenc: Add an AVClass for setting muxer specific options
rtpenc_chain: Pass the rtpflags options through to the chained muxer
rtpenc: Declare the rtp flags private AVOptions in rtpenc.h
sdp: Reindent after the previous commit
rtpenc: MP4A-LATM payload support
avoptions: Add an av_opt_flag_is_set function for inspecting flag fields
sdp: Allow passing an AVFormatContext to the SDP generation
mov: Fix wrong timestamp generation for fragmented movies that have time offset caused by the first edit list entry.
mpeg12: more advanced ffmpeg mpeg2 aspect guessing code.
swscale: split YUYV output out of yuv2packed[12X]_c().
Conflicts:
doc/APIchanges
libavcodec/Makefile
libavcodec/h264dsp_template.c
libavcodec/mpeg12.c
libavformat/aacdec.c
libavformat/avidec.c
libavformat/internal.h
libavformat/movenc.c
libavformat/rtpenc.c
libavformat/rtpenc_latm.c
libavformat/sdp.c
libavformat/version.h
libavutil/avutil.h
libavutil/pixfmt.h
libswscale/swscale.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* qatar/master:
lavf: make compute_pkt_fields2() return meaningful error values
matroskadec: set timestamps for RealAudio packets.
intelh263dec: aspect ratio processing fix.
intelh263dec: fix "Strict H.263 compliance" file playback
oss,sndio: simplify by using FFMIN.
swscale: extract monowhite/black output from yuv2packed[12X]_c().
swscale: de-macro'ify RGB15/16/32 input functions.
swscale: rearrange code.
movdec: Add support for the 'wfex' atom.
ffmpeg.c: Add a necessary const qualifier
riff: Fix potential memleak.
swscale: change 48bit RGB input macros to inline functions.
swscale: change 9/10bit YUV input macros to inline functions.
swscale: extract gray16 output functions from yuv2packed[12X]().
swscale: use standard clipping functions.
swscale: merge macros that are used only once.
swscale: fix function declarations in swscale.c.
swscale: fix function declaration keywords in x86/swscale_template.c.
Conflicts:
ffmpeg.c
libavcodec/intelh263dec.c
libswscale/swscale.c
libswscale/x86/swscale_template.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Inline functions are easier to read, maintain, modify and test,
which justifies the slightly increased source size. This patch
also adds support for non-native endianness RGB15/16 and fixes
isSupportedOutput() to no longer claim that we support writing
non-native RGB565/555/444.
Reintroduce the internal symbol which was removed in:
commit e1197b9e17
Author: Stefano Sabatini <stefano.sabatini-lala@poste.it>
Date: Sun May 29 17:57:40 2011 +0200
swscale: remove sws_format_name()
Use av_get_pix_fmt_name() instead.
The symbol is used by some external libs (hi libx264!), this gives
time to them to use the recently added av_get_pix_fmt_name() rather
than an internal symbol.
* qatar/master: (27 commits)
ac3enc: fix LOCAL_ALIGNED usage in count_mantissa_bits()
ac3dsp: do not use the ff_* prefix when referencing ff_ac3_bap_bits.
ac3dsp: fix loop condition in ac3_update_bap_counts_c()
ARM: unbreak build
ac3enc: modify mantissa bit counting to keep bap counts for all values of bap instead of just 0 to 4.
ac3enc: split mantissa bit counting into a separate function.
ac3enc: store per-block/channel bap pointers by reference block in a 2D array rather than in the AC3Block struct.
get_bits: add av_unused tag to cache variable
sws: replace all long with int.
ARM: aacdec: fix constraints on inline asm
ARM: remove unnecessary volatile from inline asm
ARM: add "cc" clobbers to inline asm where needed
ARM: improve FASTDIV asm
ac3enc: use LOCAL_ALIGNED macro
APIchanges: fill in git hash for av_get_pix_fmt_name (0420bd7).
lavu: add av_get_pix_fmt_name() convenience function
cmdutils: remove OPT_FUNC2
swscale: fix crash in bilinear scaling.
vpxenc: add VP8E_SET_STATIC_THRESHOLD mapping
webm: support stereo videos in matroska/webm muxer
...
Conflicts:
Changelog
cmdutils.c
cmdutils.h
doc/APIchanges
doc/muxers.texi
ffmpeg.c
ffplay.c
libavcodec/ac3enc.c
libavcodec/ac3enc_float.c
libavcodec/avcodec.h
libavcodec/get_bits.h
libavcodec/libvpxenc.c
libavcodec/version.h
libavdevice/libdc1394.c
libavformat/matroskaenc.c
libavutil/avutil.h
libswscale/rgb2rgb.c
libswscale/swscale.c
libswscale/swscale_template.c
libswscale/x86/swscale_template.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
commit 93681fbd50
Author: Ronald S. Bultje <rsbultje@gmail.com>
Date: Thu May 26 11:32:32 2011 -0400
swscale: fix compile on ppc.
commit e758573a88
Author: Ronald S. Bultje <rsbultje@gmail.com>
Date: Thu May 26 10:36:47 2011 -0400
swscale: fix compile on x86-32.
commit 0f4eb8b043
Author: Ronald S. Bultje <rsbultje@gmail.com>
Date: Thu May 26 09:17:52 2011 -0400
swscale: remove VOF/VOFW.
commit b4a224c5e4
Author: Ronald S. Bultje <rsbultje@gmail.com>
Date: Wed May 25 14:30:09 2011 -0400
swscale: split chroma buffers into separate U/V planes.
Preparatory step to implement support for sizes > VOFW.
* qatar/master: (22 commits)
configure: enable memalign_hack automatically when needed
swscale: unbreak the build on non-x86 systems.
swscale: remove if(bitexact) branch from functions.
swscale: remove if(canMMX2BeUsed) conditional.
swscale: remove swScale_{c,MMX,MMX2} duplication.
swscale: use emms_c().
Move emms_c() from libavcodec to libavutil.
tiff: set palette in the context when specified in TIFF_PAL tag
rtsp: use strtoul to parse rtptime and seq values.
pgssubdec: fix incorrect colors.
dvdsubdec: fix incorrect colors.
ape: Allow demuxing of files with metadata tags.
swscale: remove dead macro WRITEBGR24OLD.
swscale: remove AMD3DNOW "optimizations".
swscale: remove duplicate code in ppc/ subdirectory.
swscale: remove duplicated x86/ functions.
swscale: force --enable-runtime-cpudetect and remove SWS_CPU_CAPS_*.
vsrc_buffer.h: add file doxy
vsrc_buffer: tweak error message in init()
msmpeg4: reindent.
...
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* qatar/master: (33 commits)
rtpdec_qdm2: Don't try to parse data packet if no configuration is received
ac3enc: put the counting of stereo rematrixing bits in the same place to make the code easier to understand.
ac3enc: clean up count_frame_bits() and count_frame_bits_fixed()
mpegvideo: make FF_DEBUG_DCT_COEFF output coeffs via av_log() instead of just via AVFrame.
srtdec: make sure we don't write past the end of buffer
wmaenc: improve channel count and bitrate error handling in encode_init()
matroskaenc: make sure we don't produce invalid file with no codec ID
matroskadec: check that pointers were initialized before accessing them
lavf: fix function name in compute_pkt_fields2 av_dlog message
lavf: fix av_find_best_stream when providing a wanted stream.
lavf: fix av_find_best_stream when decoder_ret is given and using a related stream.
ffmpeg: factorize quality calculation
tiff: add support for SamplesPerPixel tag in tiff_decode_tag()
tiff: Prefer enum TiffCompr over int for TiffContext.compr.
mov: Support edit list atom version 1.
configure: Enable libpostproc automatically if GPL code is enabled.
Cosmetics: fix prototypes in oggdec
oggdec: fix memleak with continuous streams.
matroskaenc: add missing new line in av_log() call
dnxhdenc: add AVClass in private context.
...
swscale changes largely rewritten by me or replaced by baptsites due to lots of bugs in ronalds code.
Above code is also just in case its not obvios to a large extended duplicates that where cherry picked
from ffmpeg.
Conflicts:
configure
ffmpeg.c
libavformat/matroskaenc.c
libavutil/pixfmt.h
libswscale/ppc/swscale_template.c
libswscale/swscale.c
libswscale/swscale_template.c
libswscale/utils.c
libswscale/x86/swscale_template.c
tests/fate/h264.mak
tests/ref/lavfi/pixdesc_le
tests/ref/lavfi/pixfmts_copy_le
tests/ref/lavfi/pixfmts_null_le
tests/ref/lavfi/pixfmts_scale_le
tests/ref/lavfi/pixfmts_vflip_le
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Adding _POSIX_C_SOURCE to CPPFLAGS globally produces all sorts of problems
since it causes certain system functions to be hidden on some (BSD) systems.
The solution is to only add the flag on systems that really require it, i.e.
glibc-based ones.
This change makes BSD systems compile out-of-the-box without the need for
adding specific flags manually. It also allows dropping a number of flags
set manually on a file-per-file basis, but were only present to work around
breakage introduced by the presence of _POSIX_C_SOURCE.
Also add _XOPEN_SOURCE to CPPFLAGS for glibc systems. We use XSI extensions
in several places already, so it is preferable to define it globally instead
of littering source files with individual #defines only needed for glibc.
Fix handling of input if not in native endianness, and add support for
9/10-bit output. This allows us to force endianness of YUV420P 9/10bit
in the H264/10bit fate tests, which should fix them on big-endian
systems.
* qatar/master: (30 commits)
AVOptions: make default_val a union, as proposed in AVOption2.
arm/h264pred: add missing argument type.
h264dsp_mmx: place bracket outside #if/#endif block.
lavf/utils: fix ff_interleave_compare_dts corner case.
fate: add 10-bit H264 tests.
h264: do not print "too many references" warning for intra-only.
Enable decoding of high bit depth h264.
Adds 8-, 9- and 10-bit versions of some of the functions used by the h264 decoder.
Add support for higher QP values in h264.
Add the notion of pixel size in h264 related functions.
Make the h264 loop filter bit depth aware.
Template dsputil_template.c with respect to pixel size, etc.
Template h264idct_template.c with respect to pixel size, etc.
Preparatory patch for high bit depth h264 decoding support.
Move some functions in dsputil.c into a new file dsputil_template.c.
Move the functions in h264idct into a new file h264idct_template.c.
Move the functions in h264pred.c into a new file h264pred_template.c.
Preparatory patch for high bit depth h264 decoding support.
Add pixel formats for 9- and 10-bit yuv420p.
Choose h264 chroma dc dequant function dynamically.
...
Conflicts:
doc/APIchanges
ffmpeg.c
ffplay.c
libavcodec/alpha/dsputil_alpha.c
libavcodec/arm/dsputil_init_arm.c
libavcodec/arm/dsputil_init_armv6.c
libavcodec/arm/dsputil_init_neon.c
libavcodec/arm/dsputil_iwmmxt.c
libavcodec/arm/h264pred_init_arm.c
libavcodec/bfin/dsputil_bfin.c
libavcodec/dsputil.c
libavcodec/h264.c
libavcodec/h264.h
libavcodec/h264_cabac.c
libavcodec/h264_cavlc.c
libavcodec/h264_loopfilter.c
libavcodec/h264_ps.c
libavcodec/h264_refs.c
libavcodec/h264dsp.c
libavcodec/h264idct.c
libavcodec/h264pred.c
libavcodec/mlib/dsputil_mlib.c
libavcodec/options.c
libavcodec/ppc/dsputil_altivec.c
libavcodec/ppc/dsputil_ppc.c
libavcodec/ppc/h264_altivec.c
libavcodec/ps2/dsputil_mmi.c
libavcodec/sh4/dsputil_align.c
libavcodec/sh4/dsputil_sh4.c
libavcodec/sparc/dsputil_vis.c
libavcodec/utils.c
libavcodec/version.h
libavcodec/x86/dsputil_mmx.c
libavformat/options.c
libavformat/utils.c
libavutil/pixfmt.h
libswscale/swscale.c
libswscale/swscale_internal.h
libswscale/swscale_template.c
tests/ref/seek/lavf_avi
Merged-by: Michael Niedermayer <michaelni@gmx.at>
In the loop:
for (i=0; i<dstH; i++) {
int chrI= i*c->chrDstH / dstH;
when i*c->chrDstH > INT_MAX this leads to an integer overflow, which
results in a negative value for chrI and in out-of-buffer reads. The
overflow is avoided by forcing int64_t arithmetic by casting i to
int64_t.
Fix crash, and trac issue #72.
Signed-off-by: Stefano Sabatini <stefano.sabatini-lala@poste.it>
