FFmpeg

Commit Graph

Author	SHA1	Message	Date
Michael Niedermayer	11512d70fa	avcodec/get_bits: add BITS_LEFT() for finding the bits left with an opened reader Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	11 years ago
Timothy Gu	ea6178fff8	get_bits: remove unused assignment Signed-off-by: Timothy Gu <timothygu99@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	11 years ago
Michael Niedermayer	e6f9fc4adc	avcodec/bitstream: try to make vlc init code inherently thread safe also remove spinlock, it doesnt work on AIX Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	11 years ago
Matthew Lindner	b372f67342	avcodec: better level/index printing	11 years ago
Michael Niedermayer	6df33c4926	avcodec: include GET_RL_VLC() in trace output Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	11 years ago
Reimar Döffinger	8cbf0827e1	Various small spelling fixes. Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>	11 years ago
Michael Niedermayer	44e8e82d34	avcodec/get_bits: add skip_1stop_8data_bits Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	11 years ago
Michael Niedermayer	54197c7aae	skip_bits: dont call UPDATE_CACHE UPDATE_CACHE isnt needed and can cause segfaults Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	11 years ago
Michael Niedermayer	121fc05b4d	avcodec/get_bits: place volatile at the right spot Should fix Ticket2825 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Michael Niedermayer	43411f416f	avcodec/get_bits: init_state is used for thread sync, make it volatile Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Michael Niedermayer	6af8326354	avcodec/ff_init_vlc_sparse: use a spinlock for thread sync Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Paul B Mahol	48f2750de8	get_bits: add get_bits_le() Signed-off-by: Paul B Mahol <onemda@gmail.com>	12 years ago
Michael Niedermayer	ff130d7363	get_xbits: assert validity of the number of bits similar is already done in the other get_bits() functions Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Ronald S. Bultje	9918f57dcf	get_bits: Return pointer to buffer that is the result of the alignment This allows more transparent mixing of get_bits and whole-byte access without having to touch get_bits internals. Signed-off-by: Martin Storsjö <martin@martin.st>	12 years ago
Ronald S. Bultje	fd6a021d8e	get_bits: return pointer to buffer that is the result of the alignment. This allows more transparent mixing of get_bits and whole-byte access without having to touch get_bits internals. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Diego Biurrun	4af5310d29	get_bits/put_bits: K&R formatting cosmetics Signed-off-by: Diego Biurrun <diego@biurrun.de>	12 years ago
Luca Barbato	4603ec85ed	get_bits: change the failure condition in init_get_bits Too much code relies in having init_get_bits fed with a valid buffer and set its dimension to 0. Check for NULL buffer instead.	12 years ago
Michael Niedermayer	7980cca05c	init_get_bits: fix off by 1 error Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Michael Niedermayer	153fad14e5	init_get_bits8: zero pointers & struct on error Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Michael Niedermayer	ac73d3a12a	init_get_bits8: check byte_size against being positive Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Luca Barbato	e28ac6e5e2	lavc: introduce the convenience function init_get_bits8 Accept the buffer size in bytes and check for overflow before passing the value in bits to init_get_bits.	12 years ago
Luca Barbato	d9cf5f5169	lavc: check for overflow in init_get_bits Fix an undefined behaviour and make the function return a proper error in case of overflow. CC: libav-stable@libav.org	12 years ago
Michael Niedermayer	7efee140d7	get_bits: rename get_bits_longlong to get_bits64 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Michael Niedermayer	41540b36a1	bitstream: add get_bits64() to support reading more than 32 bits at once Also remove a duplicate function in the MPEG-TS demuxer. Signed-off-by: Michael Niedermayer <michaelni@gmx.at> Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>	12 years ago
Michael Niedermayer	094a82c7de	get_bits: get_bits_long() support n=0 as the docs allow it also the 0 case is indeed used in some code pathes Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Michael Niedermayer	f51c4bfe3f	bitstream: add get_bits_longlong() to support more than 32bits Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Michael Niedermayer	5f1c3c785c	get_bits_long: fix variable type This fixes a theoretical signed overflow Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Diego Biurrun	e00215040a	get_bits: const correctness for get_bits_trace()/get_xbits_trace() arguments	12 years ago
Michael Niedermayer	6560fa390e	get_bits: check the number of bits parameter through av_assert2() Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Ronald S. Bultje	b44b41633f	get_bits: add HAVE_BITS_REMAINING macro.	13 years ago
Martin Storsjö	e96b4a53df	vlc/rl: Add ff_ prefix to the nonstatic symbols Signed-off-by: Martin Storsjö <martin@martin.st>	13 years ago
Diego Biurrun	aaf47bcde7	Drop ALT_ prefix from BITSTREAM_READER_LE name. The prefix is a historic remnant that probably meant "alternative". Now that the A32 bitstream reader has been dropped it makes no sense anymore.	13 years ago
Michael Niedermayer	1a2484fc4e	get_bits: drop the a32 reader. that way qatar maintains the code for me and i dont need to resolve conflicts. If someone wants the a32 reader back, only thing you need to do is maintain it, i would be happy to have it back, iam just not volunteering to maintain it due to lack of time. Based on: `a1e98f198e` by Mans Rullgard. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Mans Rullgard	86a10281c7	get_bits: remove LAST_SKIP_CACHE macro This macro is empty since the removal of the A32 bitstream reader. Signed-off-by: Mans Rullgard <mans@mansr.com>	13 years ago
Mans Rullgard	5d8122db5c	get_bits: remove strange/obsolete comments Signed-off-by: Mans Rullgard <mans@mansr.com>	13 years ago
Mans Rullgard	e42bb0ee01	get_bits: whitespace (mostly) cosmetics Signed-off-by: Mans Rullgard <mans@mansr.com>	13 years ago
Mans Rullgard	adb28c49bd	get_bits: remove unnecessary #includes Signed-off-by: Mans Rullgard <mans@mansr.com>	13 years ago
Ronald S. Bultje	8cfbbd928c	get_bits: introduce safe bitreading to prevent overreads. When turned on, H264/CAVLC gets ~15% (CVPCMNL1_SVA_C.264) slower for ultra-high-bitrate files, or ~2.5% (CVFI1_SVA_C.264) for lower-bitrate files. Other codecs are affected to a lesser extent because they are less optimized; e.g., VC-1 slows down by less than 1% (all on x86). The patch generated 3 extra instructions (cmp, cmovae and mov) per call to get_bits(). The performance penalty on ARM is within the error margin for most files, up to 4% in extreme cases such as CVPCMNL1_SVA_C.264. Based on work (for GCI) by Aneesh Dogra <lionaneesh@gmail.com>, and inspired by patch in Chromium by Chris Evans <cevans@chromium.org>.	13 years ago
Mans Rullgard	a1e98f198e	get_bits: remove A32 variant The A32 bitstream reader variant is only used on ARMv5 and for Prores due to the larger bit cache this decoder requires. In benchmarks on ARMv5 (Marvell Sheeva) with gcc 4.6, the only statistically significant difference between ALT and A32 is a 4% advantage for ALT in FLAC decoding. There is thus no (longer) any reason to keep the A32 reader from this point of view. This patch adds an option to the ALT reader increasing the bit cache to 32 bits as required by the Prores decoder. Benchmarking shows no significant change in speed on Intel i7. Again, the A32 reader fails to justify its existence. Signed-off-by: Mans Rullgard <mans@mansr.com>	13 years ago
Mans Rullgard	b8909cb364	get_bits: remove useless pointer casts These pointers are already of the correct type. Signed-off-by: Mans Rullgard <mans@mansr.com>	13 years ago
Diego Biurrun	58c42af722	doxygen: misc consistency, spelling and wording fixes	13 years ago
Elvis Presley	3dd47ae537	Revert "get_bits: remove x86 inline asm in A32 bitstream reader" This reverts commit `23ce6e7212`.	13 years ago
Mans Rullgard	23ce6e7212	get_bits: remove x86 inline asm in A32 bitstream reader x86 does not use this variant so having inline asm there is pointless. Signed-off-by: Mans Rullgard <mans@mansr.com>	14 years ago
Diego Biurrun	be73d76b34	cosmetics: fix some then/than typos	14 years ago
Mans Rullgard	e01e05ee66	get_bits: add av_unused tag to cache variable This silences numerous compiler warnings from skip_bits(), where the cache variable is not used. Signed-off-by: Mans Rullgard <mans@mansr.com>	14 years ago
Michael Niedermayer	105a3c7a6b	bitstream_reader: Try to fix "get_bits.h:305:45: warning: variable ‘re_cache’ set but not used [-Wunused-but-set-variable]" Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	14 years ago
Michael Niedermayer	3acc44b739	bitstream reader: remove unneeded variable initilization. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	14 years ago
Alex Converse	47bc52f821	get_bits: make cache unsigned to eliminate undefined signed overflow.	14 years ago
Mans Rullgard	2912e87a6c	Replace FFmpeg with Libav in licence headers Signed-off-by: Mans Rullgard <mans@mansr.com>	14 years ago
Mans Rullgard	a4bff12cdd	get_bits: move tracing macros to end of file Signed-off-by: Mans Rullgard <mans@mansr.com> (cherry picked from commit `611a6f59ce`)	14 years ago

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86 Commits (2a85826e5753aac8964254bd5688a03e49a7f551)