FFmpeg

Commit Graph

Author	SHA1	Message	Date
Ronald S. Bultje	2ba65879b5	swscale: remove unused U/V arguments from yuv2rgb_write(). Also document the function somewhat.	13 years ago
Ronald S. Bultje	6b3995ccd1	swscale: remove obsolete comment.	13 years ago
Ronald S. Bultje	9ea3501d87	swscale: don't show full-chroma-int warning for non-RGB output. Non-RGB output always uses full chroma interpolation.	13 years ago
Ronald S. Bultje	d49352c7cc	swscale: fix overflows in vertical scaling at top/bottom edges. 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.	13 years ago
Ronald S. Bultje	72dafea0fc	swscale: fix overflow in gray16 vertical scaling. 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>	13 years ago
Mans Rullgard	77d88b872d	swscale: fix integer overflows in RGB pixel writing. 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>	13 years ago
Ronald S. Bultje	be1bafc303	swscale: fix overflows in output of RGB48 pixels. 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>	13 years ago
Ronald S. Bultje	4391805916	swscale: fix overflows in RGB rounding constants. Signed-off-by: Mans Rullgard <mans@mansr.com>	13 years ago
Mans Rullgard	373211d828	Remove extraneous semicolons These semicolons cause invalid empty top-level declarations. Signed-off-by: Mans Rullgard <mans@mansr.com>	13 years ago
Michael Niedermayer	b552e3f6d8	swscale: Fix all cast qualifier warnings: libswscale/swscale.c:2744:40: warning: to be safe all intermediate pointers in cast from ‘int16_t ’ to ‘const int16_t ’ must be ‘const’ qualified [-Wcast-qual] libswscale/swscale.c:2745:41: warning: to be safe all intermediate pointers in cast from ‘int16_t ’ to ‘const int16_t ’ must be ‘const’ qualified [-Wcast-qual] libswscale/swscale.c:2746:41: warning: to be safe all intermediate pointers in cast from ‘int16_t ’ to ‘const int16_t ’ must be ‘const’ qualified [-Wcast-qual] libswscale/swscale.c:2747:78: warning: to be safe all intermediate pointers in cast from ‘int16_t ’ to ‘const int16_t ’ must be ‘const’ qualified [-Wcast-qual] Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Mans Rullgard	7c5ce99bd9	swscale: fix signed overflow in yuv2mono_X_c_template 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>	13 years ago
Michael Niedermayer	31a1342e7a	swscale: remove duplicate code from yesterdays merge. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Ronald S. Bultje	185655c601	swscale: add support for planar RGB input.	13 years ago
Michael Niedermayer	0a3a125fd9	sws: update copyright dates Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	f44ad92c3f	sws: print a warning on unaligned input on SSE2+ Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	fbf4b390d0	sws: increase stride alignment requirement for the warning print code. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	90640cc764	sws: fix assert failure Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	76a3490672	sws: add yuv2yuvX() back and updated to the just 1 plane API Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	74fdb7a0f8	sws: factorize v*Filter use Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	b6dcd6dfcc	sws cleanup yuv2planeX_10_c_template() Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	b1a4b735f9	sws: remove nonsensical code that leaked in from libav Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	1c26f2da81	sws: drop unused code Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Ronald S. Bultje	109f62e8f8	swscale: decide whether to use yuv2plane1/X on a per-plane basis.	13 years ago
Ronald S. Bultje	f99654d470	swscale: reintroduce full precision in 16-bit output.	13 years ago
Kieran Kunhya	ff7913aef1	Split up yuv2yuvX functions Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>	13 years ago
Kieran Kunhya	34e8d147b3	Split out yuv2yuv1 luma and chroma in order to make them generic DSP functions Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>	13 years ago
Ronald S. Bultje	dc49bf1270	sws/pixfmt/pixdesc: add support for yuv420p9le/be.	13 years ago
Michael Niedermayer	cca81e7eb0	sws: gbr24p input support Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	bd141af460	swscale: Fix prototypes of *toyv12 so they can be used with planar rgb input. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Kieran Kunhya	4d4d0e8176	Fix unnecessary shift with 9/10bit vertical scaling Signed-off-by: Diego Biurrun <diego@biurrun.de>	13 years ago
Michael Niedermayer	d06c5b44cc	swscale: drop redundant code. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Clément Bœsch	7c14c24250	sws: fix a huge amount of incompatible pointer type arguments warnings.	13 years ago
Ronald S. Bultje	3f04ab4fcd	swscale: split hScale() function pointer into h[cy]Scale(). 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.	13 years ago
Michael Niedermayer	d9c9a0c767	sws: remove hScale16NX_c() Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	66bb5cd592	sws: remove hScale16N() and use ronalds reformated version of it. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	3652409f5b	sws: remove unneeded code from last merge Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Ronald S. Bultje	28c1115a91	swscale: use 15-bit intermediates for 9/10-bit scaling.	13 years ago
Ronald S. Bultje	62ee0e6a97	Revert "swscale: use 15-bit intermediates for 9/10-bit scaling." This reverts commit `ac0fb59348`. It causes valgrind errors which I'll want to investigate before resubmitting this.	13 years ago
Ronald S. Bultje	ac0fb59348	swscale: use 15-bit intermediates for 9/10-bit scaling.	13 years ago
Ronald S. Bultje	c59f9a68e2	swscale: error dithering for 16/9/10-bit to 8-bit. Based on a somewhat similar idea in FFmpeg's swscale copy.	14 years ago
Ronald S. Bultje	93a10dd561	swscale: fix overflow in 16-bit vertical scaling. We operated on 31-bits, but with e.g. lanczos scaling, values can add up to beyond 0x80000000, thus leading to output of zeroes. Drop one bit of precision fixes this.	14 years ago
Ronald S. Bultje	71a04bc19d	swscale: fix crash in 8-bpc bilinear output without alpha. We accessed the alpha array even it wasn't used and didn't exist, hence leading to a NULL pointer segfault. (cherry picked from commit `bf2cba4532`)	14 years ago
Michael Niedermayer	08b57574c6	sws: fix non native endian 9-15 bit input with 16bit out	14 years ago
Michael Niedermayer	ca78fa24b7	sws: disable scale16 when int32 is used	14 years ago
Michael Niedermayer	987e4c1787	sws: fix rgb -> 16bit	14 years ago
Michael Niedermayer	d2c910b9a4	sws: fix gray16_1	14 years ago
Michael Niedermayer	9470205414	sws:ix yuv2rgb48_1_c_template()	14 years ago
Michael Niedermayer	ae05dd8731	sws: fix 16/32 bug from merge	14 years ago
Ronald S. Bultje	948ccdadf4	swscale: for >8bit scaling, read in native bit-depth. For 9/10bit, it means we don't have to upscale to 16bit before actual scaling or pixel format conversion, and thus a performance gain.	14 years ago
Ronald S. Bultje	4e3e333a79	swscale: error dithering for 16/9/10-bit to 8-bit. Based on a somewhat similar idea in FFmpeg's swscale copy.	14 years ago

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677 Commits (da02836b9d204ca002d973ef7b1e6f60a2316cb1)