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* Drop some pointless void* return value casts from av_malloc() invocations.Diego Biurrun2012-01-02
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* swscale: prevent invalid writes in packed_16bpc_bswapJanne Grunau2011-12-26
| | | | | Writes past the end of the destination buffer were occuring when its stride was smaller than the stride of the source. Fixes Bug #183.
* sws: readd PAL8 to isPacked()Anton Khirnov2011-12-22
| | | | Fixes PAL8 to YUV conversion.
* swscale: fix formatting and indentation of unscaled conversion routines.Nathan Adil Maxson2011-12-18
| | | | Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
* swscale: fix overflows in vertical scaling at top/bottom edges.Ronald S. Bultje2011-12-18
| | | | | | | | | | | | | | | | | | | | | | This fixes integer multiplication overflows in RGB48 output (vertical) scaling as detected by IOC. What happens is that for certain types of filters (lanczos, spline, bicubic), the intermediate sum of coefficients in the middle of a filter can be larger than the fixed-point equivalent of 1.0, even if the final sum is 1.0. This is fine and we support that. However, at frame edges, initFilter() will merge the coefficients for the off-screen pixels into the top or bottom pixel, such as to emulate edge extension. This means that suddenly, a single coefficient can be larger than the fixed-point equivalent of 1.0, which the vertical scaling routines do not support. Therefore, remove the merging of coefficients for edges for the vertical scaling filter, and instead add edge detection to the scaler itself so that it copies the pointers (not data) for the edges (i.e. it uses line[0] for line[-1] as well), so that a single coefficient is never larger than the fixed-point equivalent of 1.0.
* swscale: fix overflow in gray16 vertical scaling.Ronald S. Bultje2011-12-17
| | | | | | | | | | This fixes the same overflow as in the RGB48/16-bit YUV scaling; some filters can overflow both negatively and positively (e.g. spline/lanczos), so we bias a signed integer so it's "half signed" and "half unsigned", and can cover overflows in both directions while maintaining full 31-bit depth. Signed-off-by: Mans Rullgard <mans@mansr.com>
* swscale: fix integer overflows in RGB pixel writing.Mans Rullgard2011-12-17
| | | | | | | | We're shifting individual components (8-bit, unsigned) left by 24, so making them unsigned should give the same results without the overflow. Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
* swscale: add endian conversion for RGB555 and RGB444 pixel formatsJanne Grunau2011-12-17
| | | | Add a macro to shorten the if condition.
* swscale: fix overflows in output of RGB48 pixels.Ronald S. Bultje2011-12-17
| | | | | | | | | | | | | | For certain types of filters where the intermediate sum of coefficients can go above the fixed-point equivalent of 1.0 in the middle of a filter, the sum of a 31-bit calculation can overflow in both directions and can thus not be represented in a 32-bit signed or unsigned integer. To work around this, we subtract 0x40000000 from a signed integer base, so that we're halfway signed/unsigned, which makes it fit even if it overflows. After the filter finishes, we add the scaled bias back after a shift. We use the same trick for 16-bit bpc YUV output routines. Signed-off-by: Mans Rullgard <mans@mansr.com>
* swscale: add rgb565 endianess conversionJanne Grunau2011-12-17
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* swscale: fix overflows in RGB rounding constants.Ronald S. Bultje2011-12-17
| | | | Signed-off-by: Mans Rullgard <mans@mansr.com>
* swscale: add unscaled packed 16 bit per component endianess conversionJanne Grunau2011-12-16
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* swscale_mmx: drop no longer required parameters from VSCALEX macrosDiego Biurrun2011-12-14
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* swscale: Mark yuv2planeX_8_mmx as MMX2; it contains MMX2 instructions.Diego Biurrun2011-12-14
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* build: move inclusion of subdir.mak to main subdir loopMans Rullgard2011-12-13
| | | | Signed-off-by: Mans Rullgard <mans@mansr.com>
* doxygen: misc consistency, spelling and wording fixesDiego Biurrun2011-12-12
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* Remove extraneous semicolonsMans Rullgard2011-12-11
| | | | | | These semicolons cause invalid empty top-level declarations. Signed-off-by: Mans Rullgard <mans@mansr.com>
* swscale: #include "libavutil/mathematics.h"Reinhard Tartler2011-12-01
| | | | | | | | this file uses the M_PI macro since 4e74187db2f5db52f88729efc662df9d6bc763e1, so include the correct header directly. Signed-off-by: Reinhard Tartler <siretart@tauware.de>
* swscale: fix signed overflow in yuv2mono_X_c_templateMans Rullgard2011-11-26
| | | | | | | | As old bits are shifted out of the accumulator, they cause signed overflows when they reach the end. Making the variable unsigned fixes this. Signed-off-by: Mans Rullgard <mans@mansr.com>
* swscale: Readd #define _SVID_SOURCEMartin Storsjö2011-11-25
| | | | | | | | | | | | | | | | | This was removed erroneously in 046f081b46c8479820409cf8f530b988221bd15b. 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>
* swscale: fix failing fate tests.Ronald S. Bultje2011-11-24
| | | | isGray() is left as a FIXME for later.
* swscale: add support for planar RGB input.Ronald S. Bultje2011-11-24
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* Clean up swscale pixfmt macros using av_pix_fmt_descriptors[].Ronald S. Bultje2011-11-24
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* swscale: Fix stack alignment for SSEJohn Stebbins2011-11-19
| | | | | | | | Although gcc guarantees 16 byte stack alignment, threads under WinXP don't appear to be guaranteed to start stack aligned. So fix the alignment. Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
* swscale: handle unaligned buffers in yuv2plane1Ronald S. Bultje2011-11-13
| | | | | | | The issue had been introduced in c435653627529e22d74214c2266f571255e404d6 Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
* swscale: add padding to conversion buffer.Sean McGovern2011-11-11
| | | | | | | | | | | | 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>
* swscale: write yuv2plane1 MMX/SSE2/SSE4/AVX functions.Ronald S. Bultje2011-11-05
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* swscale: align vertical filtersize by 2 on x86.Ronald S. Bultje2011-11-05
| | | | | | The vertical scaler handles 2 rows at a time and thus requires alignment by 2, or else it'll read invalid memory and result in corrupt output.
* swscale: add missing colons to x86 assembly yuv2planeX.Ronald S. Bultje2011-10-23
| | | | This fixes assembling using "nasm".
* swscale: update altivec yuv2planeX asm to new per-plane API.Ronald S. Bultje2011-10-22
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* swscale: make yuv2yuvX_10_sse2/avx 8/9/16-bits aware.Ronald S. Bultje2011-10-22
| | | | Also implement MMX/MMX2 versions and SSE4 versions.
* yuv2planeX10 SIMDKieran Kunhya2011-10-22
| | | | Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
* swscale: decide whether to use yuv2plane1/X on a per-plane basis.Ronald S. Bultje2011-10-22
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* swscale: reintroduce full precision in 16-bit output.Ronald S. Bultje2011-10-22
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* Split up yuv2yuvX functionsKieran Kunhya2011-10-22
| | | | Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
* Split out yuv2yuv1 luma and chroma in order to make them generic DSP functionsKieran Kunhya2011-10-22
| | | | Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
* swscale: fix signed shift overflows in ff_yuv2rgb_c_init_tables()Mans Rullgard2011-10-21
| | | | Signed-off-by: Mans Rullgard <mans@mansr.com>
* sws/pixfmt/pixdesc: add support for yuv420p9le/be.Ronald S. Bultje2011-10-21
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* swscale: prevent overflow in coefficient calculation.Ronald S. Bultje2011-10-21
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* swscale: prevent overflow during initializationRonald Bultje2011-10-18
| | | | Signed-off-by: Janne Grunau <janne-libav@jannau.net>
* AVOptions: rename FF_OPT_TYPE_* => AV_OPT_TYPE_*Anton Khirnov2011-10-12
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* sws: support yuv444p9/10 output.Anton Khirnov2011-10-12
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* swscale: use aligned move for storage into temporary buffer.Ronald S. Bultje2011-10-11
| | | | The intermediate buffer is always aligned.
* ppc: fix some pointer to integer castsMans Rullgard2011-09-25
| | | | | | | | Use uintptr_t instead of plain int. Without this change, the comparisons will come out wrong for pointers in certain ranges. Fixes random failures on ppc64. Also fixes some compiler warnings. Signed-off-by: Mans Rullgard <mans@mansr.com>
* Fix unnecessary shift with 9/10bit vertical scalingKieran Kunhya2011-09-23
| | | | Signed-off-by: Diego Biurrun <diego@biurrun.de>
* swscale: fix byte overreads in SSE-optimized hscale().Ronald S. Bultje2011-09-15
| | | | | | 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.
* sws: implement MMX/SSE2/SSSE3/SSE4 versions for horizontal scaling.Ronald S. Bultje2011-09-13
| | | | | | Speed: from 3.9x to 9.6x speed improvement over C, and some small (up to 15%) speed improvements over existing MMX code (particularly for bigger filters).
* lavf,lavc,sws: add {avcodec,avformat,sws}_get_class() functions.Anton Khirnov2011-09-03
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* swscale: split hScale() function pointer into h[cy]Scale().Ronald S. Bultje2011-08-17
| | | | | | This allows using more specific implementations for chroma/luma, e.g. we can make assumptions on filterSize being constant, thus avoiding that test at runtime.
* swscale: add dithering to yuv2yuvX_altivec_realLuca Barbato2011-08-13
| | | | | | | It just does that part in scalar form, I doubt using a vector store over 2 array would speed it up particularly. The function should be written to not use a scratch buffer.
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