Chiebot-Mirror/FFmpeg - FFmpeg - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Mans Rullgard	79997def65	ac3enc: use generic fixed-point mdct This makes the AC3 encoder use the shared fixed-point MDCT rather than its own implementation. The checksum changes are due to different rounding in the MDCT. Signed-off-by: Mans Rullgard <mans@mansr.com>	14 years ago
Justin Ruggles	e6e9823488	Add apply_window_int16() to DSPContext with x86-optimized versions and use it in the ac3_fixed encoder.	14 years ago
Justin	323e6fead0	ac3enc: do not right-shift fixed-point coefficients in the final MDCT stage. This increases the accuracy of coefficients, leading to improved quality. Rescaling of the coefficients to full 25-bit accuracy is done rather than offsetting the exponent values. This requires coefficient scaling to be done before determining the rematrixing strategy. Also, the rematrixing strategy calculation must use 64-bit math to prevent overflow due to the higher precision coefficients.	14 years ago
Justin Ruggles	50d7140441	ac3enc: change default floor code to 7. This is to match the value in every (E-)AC-3 file from commercial sources. It has a negligible effect on audio quality. Signed-off-by: Mans Rullgard <mans@mansr.com>	14 years ago
Justin Ruggles	c3beafa0f1	ac3enc: Change EXP_DIFF_THRESHOLD to 500. This patch changes the exponent difference threshold in the exponent strategy decision function of the AC-3 encoder. I tested lowering in increments of 100. From 1000 down to 500 generally increased in quality with each step, but 400 was generally much worse. Signed-off-by: Mans Rullgard <mans@mansr.com>	14 years ago
Justin Ruggles	ec44dd5fc2	Change the default dB-per-bit code from 2 to 3. This gives slightly better quality in PEAQ tests. Code 3 gives a dBpb value of 2816 = -132dB (128 psd units = -6dB), which corresponds to 22 bits. Since the exponents have an offset applied, the 16-bit source looks like 24-bit source to the bit allocation routine. So using dBpb code=3 is a closer match to the exponent range. Regression test refs updated for acodec-ac3, lavf-rm, and seek-ac3_rm. Originally committed as revision 26144 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	295ab2af6e	Change FIX15() back to clipping to -32767..32767. This avoids a 16-bit overflow in mdct512() due to a -32768 value in costab. References updated for acodec-ac3, lavf-rm, and seek-ac3_rm tests. Thanks to Måns Rullgård for finding the bug. Originally committed as revision 26071 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Justin Ruggles	8c634b707b	Update the test references for lavf-rm and seek-ac3_rm. The references changed due to r25956. Originally committed as revision 26004 to svn://svn.ffmpeg.org/ffmpeg/trunk	14 years ago
Måns Rullgård	cc3e2472f3	Place regression test output files in subdirs per family Originally committed as revision 22155 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Måns Rullgård	eca478c317	regtest: split reference files allowing tests to run individually With this change, the output is checked immediately after each test has run. This means commands like "make regtest-mpeg2" can now be used to run a single test and get meaningful results. By default, make will abort if any test fails. To run all tests regardless, use make -k. Originally committed as revision 21254 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago