RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
26,891 Commits 36 Branches 398 Tags 232 MiB
Commit Graph

180 Commits

Author SHA1 Message Date
Justin Ruggles 68e6b0990d cosmetics: reindent after last commit 
Originally committed as revision 26041 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 22:47:11 +00:00
Justin Ruggles 795063db3b Copy bap from previous block when exponent strategy is EXP_REUSE. 
We can do this because exponents are the only bit allocation parameters which
change from block-to-block currently.
Approx. 57% faster in function bit_alloc().
Approx. 25% faster overall encoding.

Originally committed as revision 26040 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 22:47:07 +00:00
Justin Ruggles 126a29b871 Count grouped mantissas for each block all at once at the end of bit 
allocation for each block.
24% faster in function bit_alloc(). Approx. 10% faster overall encoding.

Originally committed as revision 26039 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 22:47:04 +00:00
Justin Ruggles e7536ac567 Count bits for fixed parameters at start of encoding rather than in every 
frame.

Originally committed as revision 26038 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 22:47:00 +00:00
Justin Ruggles e86ea34dad Use a LUT for number of exponent groups. This avoids recalculating it for 
every block and channel for every frame.

Originally committed as revision 26037 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 21:09:22 +00:00
Justin Ruggles 834550ea0d Speed up group minimum and group output calculations for EXP_D25 and EXP_D45 
in encode_exponents_blk_ch() by removing the inner loops. This is about 30-40%
faster for the modified sections.

Originally committed as revision 26036 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 21:09:16 +00:00
Justin Ruggles cdedf7e625 Convert a for() loop into a while() loop for the downward part of the exponent 
delta limiting.

Originally committed as revision 26035 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 21:09:08 +00:00
Justin Ruggles 27af78cf0e Redesign encode_exponents_blk_ch() so that duplicate exponent sets are no 
longer required. This gets rid of the temp buffer as well as encoded_exp in
AC3EncodeContext. It also allows for skipping the exponent grouping for
EXP_D15. 56% faster in encode_exponents_blk_ch().

Originally committed as revision 26034 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 21:09:02 +00:00
Justin Ruggles 8846ee54ad Use optimized function DSPContext.sad[0]() instead of calc_exp_diff(). 
90% faster compute_exp_strategy().

Originally committed as revision 26033 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 15:06:28 +00:00
Justin Ruggles 7786c384f6 cosmetics: pretty-printing after last commit 
Originally committed as revision 26031 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 03:44:35 +00:00
Justin Ruggles 89bedc4d2e Add a goto for init failure instead of duplicate calls to ac3_encode_close(). 
Originally committed as revision 26030 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 03:44:32 +00:00
Justin Ruggles c41ac4f82e Use pre-allocated temp buffers in mdct512(). 
5% faster in function.

Originally committed as revision 26029 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 03:44:29 +00:00
Justin Ruggles e29065f7bf Write results of post-rotation complex multiply directly to output. 
2% faster in function mdct512().

Originally committed as revision 26028 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 03:13:45 +00:00
Justin Ruggles 9d8533368f Use memcpy() instead of a for loop in mdct512(). 
8% faster in function.

Originally committed as revision 26027 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 03:13:41 +00:00
Justin Ruggles b6f6204db9 Allocate all large per-channel arrays using av_malloc(). 
Decreases memory usage for less than 6 channels.

Originally committed as revision 26026 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 02:33:02 +00:00
Justin Ruggles aa645b9888 Make windowed_samples 16-byte aligned. 
This will allow future SIMD optimization of the window function.

Originally committed as revision 26025 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 02:32:59 +00:00
Justin Ruggles e8d21fba3f Allocate planar_samples using av_mallocz(). 
Lowers memory usage when encoding less than 6 channels.

Originally committed as revision 26024 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-16 02:32:55 +00:00
Justin Ruggles 171bc51c9b Allocate bap and bap1 buffers using av_malloc(). 
This reduces the memory footprint when using less than 6 channels.
Modify bit allocation to swap the 2 buffers instead of using memcpy() and use
per-block pointers for bap. This is slightly faster (0.3%) in function
cbr_bit_allocation().

Originally committed as revision 26023 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-15 21:12:28 +00:00
Justin Ruggles 1c3e117e0b Remove last_samples[] and copy directly from planar_samples[]. 
Avoids memcpy that was used to store last samples for next frame.
Approx. 3% faster in function deinterleave_input_samples() and reduces memory
usage by 3kB.

Originally committed as revision 26021 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-15 17:28:52 +00:00
Justin Ruggles 7eeca961e3 Remove unneeded line. key_frame is already set to 1 in avcodec_alloc_frame(). 
Originally committed as revision 26020 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-15 17:28:49 +00:00
Justin Ruggles 2d82d9b1df cosmetics: comment clean-up and misc cosmetics 
Originally committed as revision 26019 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-15 17:28:44 +00:00
Justin Ruggles 5901cebecd Separate most of the per-block arrays into a separate per-block struct. 
Originally committed as revision 26018 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-15 17:28:41 +00:00
Justin Ruggles cb6247cb30 Split bit allocation search into a separate function. 
Originally committed as revision 26017 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-15 17:28:38 +00:00
Justin Ruggles 06f6f78578 10l: fix typo in compute_exp_strategy() 
Originally committed as revision 26013 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 22:45:35 +00:00
Justin Ruggles 266d24be4a Move large arrays to AC3EncodeContext rather than passing them around. 
Originally committed as revision 26012 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 22:45:31 +00:00
Justin Ruggles 7da4dc17d9 cosmetics: line wrap and spacing 
Originally committed as revision 26011 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 22:45:28 +00:00
Justin Ruggles a0d763fc88 Use a single value for SNR offset in the bit allocation search rather than 
the separate coarse and fine values.

Originally committed as revision 26010 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 22:45:22 +00:00
Justin Ruggles 70fcd7ea80 Change bit_alloc() to return the mantissa bit count. 
Originally committed as revision 26009 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 22:45:19 +00:00
Justin Ruggles 937cd1467c cosmetics: alignment and line wrap after last commit 
Originally committed as revision 26008 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 22:45:15 +00:00
Justin Ruggles 359c1d1926 Move bit counts to AC3EncodeContext. 
Originally committed as revision 26007 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 22:45:12 +00:00
Justin Ruggles 793bbf9544 Split out setting of bit allocation parameters to a separate function. 
Th new function only needs to be called at initialization because bit
allocation parameters currently do not change during encoding.

Originally committed as revision 26003 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:53:43 +00:00
Justin Ruggles 8999944ecb Split out counting of frame bits into a separate function. 
Originally committed as revision 26002 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:53:40 +00:00
Justin Ruggles 33a7d549e8 cosmetics: vertical alignment 
Originally committed as revision 26001 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:53:36 +00:00
Justin Ruggles d3325d555b Only calculate num_exp_groups once. 
Originally committed as revision 26000 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:53:33 +00:00
Justin Ruggles dc0bc0f84e Check for bit allocation error in ac3_encode_frame(). 
Move error log printout to ac3_encode_frame().

Originally committed as revision 25999 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:53:30 +00:00
Justin Ruggles f94bacc538 Split out grouping of exponents into a separate function. 
Originally committed as revision 25998 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:53:26 +00:00
Justin Ruggles b6a1e5236e Split out mantissa quantization into separate functions. 
Originally committed as revision 25997 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:53:23 +00:00
Justin Ruggles 5b44ede0ba cosmetics: rearrange some functions 
Originally committed as revision 25996 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:53:20 +00:00
Justin Ruggles d7da80806c Reverse the exponent & exponent strategy array arrangement to simplify the 
per-channel exponent strategy decision.  This will also make it easier to
plug-in other exponent strategy algorithms.

Originally committed as revision 25995 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:53:17 +00:00
Justin Ruggles 67d979fede Move writing of frame to the output bitstream to a separate function. 
Originally committed as revision 25994 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:53:13 +00:00
Justin Ruggles 084f5c5afe cosmetics: remove a comment and just spacing 
Originally committed as revision 25993 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:53:10 +00:00
Justin Ruggles 160d85f5b0 Split frame size adjustment into a separate function. 
Originally committed as revision 25992 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:53:06 +00:00
Justin Ruggles dfdf73eb1a Split exponent processing into separate functions. 
Originally committed as revision 25991 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:53:02 +00:00
Justin Ruggles 0a0a8500fb Split applying of MDCT into several separate functions. 
Originally committed as revision 25990 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:52:59 +00:00
Justin Ruggles 4acc790f3c Split input sample deinterleaving into a separate function. 
Originally committed as revision 25989 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:52:56 +00:00
Justin Ruggles 152cc52803 Separate functionally different calculations in ac3_encode_frame(). 
Originally committed as revision 25988 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:52:53 +00:00
Justin Ruggles 98f6ee4453 cosmetics: rename 2 variables 
Originally committed as revision 25987 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:52:49 +00:00
Justin Ruggles 12ed622699 Deinterleave whole frame at once instead of per-block. 
This reduces the amount of memcpy() by using pointers to overlap samples for
successive blocks rather than copying.

Originally committed as revision 25986 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:52:46 +00:00
Justin Ruggles e0685bc98f cosmetics: add & alter some comments 
Originally committed as revision 25985 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:52:43 +00:00
Justin Ruggles 282255bbd2 Split setting of bandwidth into a separate function. 
Originally committed as revision 25984 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-12-14 14:52:40 +00:00