FFmpeg

Commit Graph

Author	SHA1	Message	Date
Justin Ruggles	f9f69028af	Add emms_c() after exp_diff calculations. Fixes AC-3 encoding on OpenBSD 4.8 x86_32 and hopefully other similar configurations. Originally committed as revision 26070 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	a81d7c6aa3	Pre-calculate crc_inv at codec init. 20% faster output_frame_end(). Originally committed as revision 26069 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	386268dfff	Add some simple fallbacks for normal bit allocation failure. This allows encoding with lower bitrates by decreasing exponent bits first, then decreasing bandwidth if the user did not specify a specific cutoff frequency. Originally committed as revision 26050 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	e62ef8f2db	Check user-specified cutoff frequency in validate_options(). Originally committed as revision 26049 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	78646ac206	10l: fix encoding for LFE channel Originally committed as revision 26048 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	86c9673bab	Add support for fixed-point MDCT sizes other than 512. Originally committed as revision 26046 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	234b70d346	cosmetics: reindent after last commit Originally committed as revision 26045 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	98e34e71c0	Simplify bit allocation search by using a loop for the SNR offset increment. Originally committed as revision 26044 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	cf7c961b19	Do not calculate psd and masking curve if exponents are being reused. Approx. 20% faster in function bit_alloc_masking(). Originally committed as revision 26042 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	68e6b0990d	cosmetics: reindent after last commit Originally committed as revision 26041 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
Justin Ruggles	7786c384f6	cosmetics: pretty-printing after last commit Originally committed as revision 26031 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
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	14 years ago
Justin Ruggles	2d82d9b1df	cosmetics: comment clean-up and misc cosmetics Originally committed as revision 26019 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
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	14 years ago
Justin Ruggles	cb6247cb30	Split bit allocation search into a separate function. Originally committed as revision 26017 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	06f6f78578	10l: fix typo in compute_exp_strategy() Originally committed as revision 26013 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
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	14 years ago
Justin Ruggles	7da4dc17d9	cosmetics: line wrap and spacing Originally committed as revision 26011 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
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	14 years ago
Justin Ruggles	70fcd7ea80	Change bit_alloc() to return the mantissa bit count. Originally committed as revision 26009 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	937cd1467c	cosmetics: alignment and line wrap after last commit Originally committed as revision 26008 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	359c1d1926	Move bit counts to AC3EncodeContext. Originally committed as revision 26007 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
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	14 years ago
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	14 years ago
Justin Ruggles	33a7d549e8	cosmetics: vertical alignment Originally committed as revision 26001 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	d3325d555b	Only calculate num_exp_groups once. Originally committed as revision 26000 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
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	14 years ago
Justin Ruggles	f94bacc538	Split out grouping of exponents into a separate function. Originally committed as revision 25998 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	b6a1e5236e	Split out mantissa quantization into separate functions. Originally committed as revision 25997 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	5b44ede0ba	cosmetics: rearrange some functions Originally committed as revision 25996 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
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	14 years ago
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	14 years ago
Justin Ruggles	084f5c5afe	cosmetics: remove a comment and just spacing Originally committed as revision 25993 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago

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377 Commits (f8ff76199c380146299b434fb56f51d49be90b1f)