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93 Commits

Author SHA1 Message Date
Paul B Mahol
29b9fca4b3 avcodec: add multi vlc reader 
Heavily based and inspired by Christophe's cache branches.

Co-Authored-by: Christophe Gisquet
 2023-09-07 00:23:30 +02:00
Anton Khirnov
0b33310cd0 lavc/bitstream: avoid UB in bits_{read,peek}_signed(0) 
bits_*_signed(0) will currently invoke an undefined shift by
8 * sizeof(int).

Add bits_*_signed_nz() that only works for n>0, analogous to
bits_read_nz(). Add an explicit check for n=0 in bits_*_signed().

Found-by: James Almer
 2023-01-18 09:41:32 +01:00
Anton Khirnov
9177970bca lavc/bitstream: templatize for BE/LE 
Allows using both BE and LE bitstream readers in the same file.
 2023-01-06 10:49:42 +01:00
Alexandra Hájková
8fe551eca0 lavc: add standalone cached bitstream reader 
The cached bitstream reader was originally written by Alexandra Hájková
for Libav, with significant input from Kostya Shishkov and Luca Barbato.
It was then committed to FFmpeg in ca079b0954, by merging it with the
implementation of the current bitstream reader.

This merge makes the code of get_bits.h significantly harder to read,
since it now contains two different bitstream readers interleaved with
 #ifdefs. Additionally, the code was committed without proper authorship
attribution.

This commit re-adds the cached bitstream reader as a standalone header,
as it was originally developed. It will be made useful in following
commits.

Integration by Anton Khirnov.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
 2023-01-06 10:48:56 +01:00
Stefano Sabatini
9106a698e7 Rename bitstream.h to get_bits.h. 
Originally committed as revision 18494 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-13 16:20:26 +00:00
Stefano Sabatini
b275500706 Split bitstream.h, put the bitstream writer stuff in the new file 
put_bits.h.

Originally committed as revision 18461 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-12 08:35:26 +00:00
Stefano Sabatini
4af615b81e Document the 'size' parameter of set_put_bits_buffer_size(). 
Originally committed as revision 18448 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-11 21:04:26 +00:00
Stefano Sabatini
930cab5944 Document ff_put_string(). 
Originally committed as revision 18447 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-11 21:01:30 +00:00
Stefano Sabatini
54b02ccda2 Rename the 'put_zero' parameter of ff_put_string() to 
'terminate_string'.

Originally committed as revision 18442 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-11 15:54:21 +00:00
Stefano Sabatini
980f54513e Add documentation for skip_put_bytes(). 
Originally committed as revision 18441 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-11 14:49:46 +00:00
Stefano Sabatini
093364da30 Doxygenate ff_copy_bits(). 
Originally committed as revision 18440 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-11 14:47:35 +00:00
Stefano Sabatini
86755e82f7 Factorize declaration for the two variants of put_bits(). 
Originally committed as revision 18439 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-11 14:19:09 +00:00
Stefano Sabatini
0a73e94fd6 Clarify documentation for put_bits_count(). 
Originally committed as revision 18432 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-11 13:04:33 +00:00
Stefano Sabatini
facf521daa Document align_put_bits(). 
Originally committed as revision 18427 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-10 22:29:56 +00:00
Stefano Sabatini
fc660a0143 Doxygenate flush_put_bits() documentation. 
Originally committed as revision 18426 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-10 22:27:29 +00:00
Stefano Sabatini
e46ddebd14 Doxygenate put_bits_count() documentation. 
Originally committed as revision 18425 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-10 22:14:45 +00:00
Stefano Sabatini
f7a2aab7d8 Doxygenate init_put_bits(). 
Originally committed as revision 18423 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-10 17:30:42 +00:00
Stefano Sabatini
f9f74ab97b Add a notice telling that the behavior of skip_put_bits() is undefined 
if n is 0.

Originally committed as revision 18285 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-03-31 19:57:53 +00:00
Justin Ruggles
017c0811a1 Add a get_sbits_long() function. 
Originally committed as revision 17740 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-03-03 02:00:47 +00:00
Reimar Döffinger
edd532db64 Simplify show_bits_long and copy the GetBitsContext around only once instead of twice. 
Originally committed as revision 17736 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-03-02 19:42:31 +00:00
Michael Niedermayer
71a48ff23c Add size_in_bits to PutBitContext 
Originally committed as revision 17006 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-02-05 18:25:01 +00:00
Diego Biurrun
bad5537e2c Use full internal pathname in doxygen @file directives. 
Otherwise doxygen complains about ambiguous filenames when files exist
under the same name in different subdirectories.

Originally committed as revision 16912 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-02-01 02:00:19 +00:00
Reimar Döffinger
724cc2dfaa Use AV_WL32/AV_WB32 in bitstream.h 
Originally committed as revision 16778 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-01-25 18:12:13 +00:00
Aurelien Jacobs
b250f9c66d Change semantic of CONFIG_*, HAVE_* and ARCH_*. 
They are now always defined to either 0 or 1.

Originally committed as revision 16590 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-01-13 23:44:16 +00:00
Måns Rullgård
23ae2b68b0 Replace UNALIGNED_STORES_ARE_BAD with !HAVE_FAST_UNALIGNED 
Originally committed as revision 16364 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-12-27 23:12:00 +00:00
Måns Rullgård
a2fc0f6a6d ARM: replace "armv4l" with "arm" 
Originally committed as revision 16179 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-12-17 00:54:54 +00:00
Diego Pettenò
be449fca79 Convert asm keyword into __asm__. 
Neither the asm() nor the __asm__() keyword is part of the C99
standard, but while GCC accepts the former in C89 syntax, it is not
accepted in C99 unless GNU extensions are turned on (with -fasm). The
latter form is accepted in any syntax as an extension (without
requiring further command-line options).

Sun Studio C99 compiler also does not accept asm() while accepting
__asm__(), albeit reporting warnings that it's not valid C99 syntax.

Originally committed as revision 15627 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-10-16 13:34:09 +00:00
Stefano Sabatini
987903826b Globally rename the header inclusion guard names. 
Consistently apply this rule: the guard name is obtained from the
filename by stripping the leading "lib", converting '/' and '.'  to
'_' and uppercasing the resulting name. Guard names in the root
directory have to be prefixed by "FFMPEG_".

Originally committed as revision 15120 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-08-31 07:39:47 +00:00
Stefano Sabatini
7a7c4a7bf7 Fix typo. 
Originally committed as revision 15034 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-08-29 18:43:20 +00:00
Bartlomiej Wolowiec
8580314463 Little-endian bitstream writer 
Originally committed as revision 14965 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-08-25 08:53:14 +00:00
Måns Rullgård
29c8b6263a Remove dead code in bitstream.h 
Originally committed as revision 14238 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-07-15 18:43:26 +00:00
Ramiro Polla
6647ab80e3 bitstream: move put_sbits() from flacenc.c to bitstream.h and use it 
throughout libavcodec.

Originally committed as revision 14204 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-07-13 14:27:48 +00:00
Måns Rullgård
71c465a151 Bitstream: use AV_RB16() in LIBMPEG2_BITSTREAM_READER 
This makes LIBMPEG2_BITSTREAM_READER_HACK redundant, so remove it.

Originally committed as revision 14197 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-07-13 00:07:43 +00:00
Michael Niedermayer
d05b24ff89 Little helper macro to make the use of INIT_VLC_USE_NEW_STATIC easier. 
Originally committed as revision 13562 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-05-30 20:00:19 +00:00
Michael Niedermayer
ccc54864fe Make init_vlc* support proper static tables instead of this broken beyond 
imagination alloc_static() trash.

Originally committed as revision 13561 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-05-30 19:48:02 +00:00
Diego Biurrun
245976da2a Use full path for #includes from another directory. 
Originally committed as revision 13098 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-05-09 11:56:36 +00:00
Michael Niedermayer
1701cbfafc const 
Originally committed as revision 11846 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-02-04 00:49:14 +00:00
Kostya Shishkov
b44665c4e6 Make decode210() common function. 
Originally committed as revision 11382 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-03 09:16:56 +00:00
Diego Biurrun
5b21bdabe4 Add FFMPEG_ prefix to all multiple inclusion guards. 
Originally committed as revision 10765 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-10-17 09:37:46 +00:00
Aurelien Jacobs
28296f9c9e move get_unary() to its own file 
Originally committed as revision 10240 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-08-26 22:33:48 +00:00
Roman Shaposhnik
67c1b32f3d * getting rid of code duplication 
Originally committed as revision 9997 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-08-08 23:58:23 +00:00
Alex Beregszaszi
971e878dca copy get_unary from vc1 
Originally committed as revision 9994 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-08-08 20:38:30 +00:00
Michael Niedermayer
1ae7a85116 indent 
Originally committed as revision 9894 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-08-04 12:21:00 +00:00
Diego Biurrun
df3a80b50a cosmetics: misc typo fixes 
Originally committed as revision 9815 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-07-28 12:46:26 +00:00
Aurelien Jacobs
98f7b56bb6 move ff_copy_bits to bitstream.c 
Originally committed as revision 9503 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-07-06 14:13:25 +00:00
Måns Rullgård
99545457bf include all prerequisites in header files 
Originally committed as revision 9344 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-06-16 22:59:13 +00:00
Diego Biurrun
755bfeabcc misc spelling fixes 
Originally committed as revision 9289 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-06-12 09:29:25 +00:00
Loren Merritt
b613bacca9 add init_vlc_sparse(). faster than init_vlc() if there are lots of holes in the tables. 
Originally committed as revision 9117 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-05-24 17:38:56 +00:00
Marc Hoffman
73a47fb297 Blackfin is a strictly aligned processor. 
Patch by Marc Hoffman  mmh _at_ pleasantst.com
Subject: [Ffmpeg-devel] PATCH Blackfin UNALIGNED_STORES_ARE_BAD in bitstream.h
Date: Tue, 17 Apr 2007 06:12:02 -0400

Originally committed as revision 8777 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-04-21 23:05:30 +00:00
Diego Biurrun
e42dba481f typos/grammar 
Originally committed as revision 8641 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-04-07 14:09:20 +00:00