482569eab93ab14484c5684a92d7ba14798f613f Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/4b504e8aa290312cc35bf6a97a9da18ee8aa12e8 4b504e8aa290312cc35bf6a97a9da18ee8aa12e8

2009-12-10T10:47:43-08:00

Add more documentation to the FLAC decoder. Although still not as fast as the reference decoder, current speed hangups are in LPC subframe calculation and residual reading. The reference decoder handlers the former with loop unrolling and the latter with assembly language. Since both approaches conflict with my focus on making something easily understandable, I'll just have to live with its current speed. b4166315e341e2a8af94aa51c880ce78ca42af49 Brian Langenberger bjl@usa.net 8c768d7e756e4d79f87a9b79c46fe3d1ebae9c39 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/482569eab93ab14484c5684a92d7ba14798f613f 482569eab93ab14484c5684a92d7ba14798f613f

2009-12-09T12:22:28-08:00

Typedef various int return types into a "status" type for clarity. 9376de2ad5a2e787f48e0c79cd18b394dd02c64e Brian Langenberger bjl@usa.net 931df401bd5282824e44207525d464168392d1a4 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/8c768d7e756e4d79f87a9b79c46fe3d1ebae9c39 8c768d7e756e4d79f87a9b79c46fe3d1ebae9c39

2009-12-09T08:37:55-08:00

Fix 8-bit FLAC decoding. a33f753edaa40d6741a8a102ea0609d827663511 Brian Langenberger bjl@usa.net 0c02d7dda52d4b427bc705d230ee8a010d73dca0 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/931df401bd5282824e44207525d464168392d1a4 931df401bd5282824e44207525d464168392d1a4

2009-12-09T07:46:46-08:00

Add working CRC-8/CRC-16 checks. 173d5bb1fb9f237476d769bd3facbbc607d5dc2b Brian Langenberger bjl@usa.net 5075348bf401cb0605f7695d22e060957a489c66 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/0c02d7dda52d4b427bc705d230ee8a010d73dca0 0c02d7dda52d4b427bc705d230ee8a010d73dca0

2009-12-08T16:45:01-08:00

Fix realloc bug. aae92c65ddbc126781a9f9bebcfdab64cd8b1a49 Brian Langenberger bjl@usa.net b8301c590e5cce1bc651baa33a4879cfd3364df3 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/5075348bf401cb0605f7695d22e060957a489c66 5075348bf401cb0605f7695d22e060957a489c66

2009-12-08T14:06:58-08:00

Clean out some dead code and import the state machine generator. a79965a3e73ccb47f6d5a4161d5e1a31282ec5c7 Brian Langenberger bjl@usa.net bb15d139ec54e147f49df40a75b5481a0c73a53a Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/b8301c590e5cce1bc651baa33a4879cfd3364df3 b8301c590e5cce1bc651baa33a4879cfd3364df3

2009-12-08T11:13:03-08:00

Add close() method to FlacDecoder. In testing, while decoding is still significantly slower than flac(1), using it in conjuction with a slower encoder such as lame(1) yields a slight speed boost - probably because of a reduction in context switching since the data path goes from: flac -> python -> lame to: python -> lame a3f2dc4e2f68009ea129e3739cc76278074e9f59 Brian Langenberger bjl@usa.net e7830b7ca8f1dede96922394e2843a3f89a60dac Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/bb15d139ec54e147f49df40a75b5481a0c73a53a bb15d139ec54e147f49df40a75b5481a0c73a53a

2009-12-08T10:07:14-08:00

Convert i_array handling functions to static inline for a minor speed boost. 5352e28a5307b06dd4f98fdfab1c369f54fb2265 Brian Langenberger bjl@usa.net 83ab59059a2e14781e14c623a2d99f00342d171a Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/e7830b7ca8f1dede96922394e2843a3f89a60dac e7830b7ca8f1dede96922394e2843a3f89a60dac

2009-12-08T09:00:16-08:00

Lots of minor performance tweaks. Still about half as fast as piping from flac(1) because we're only reading one frame per call to read(). Once this is fixed, hopefully we'll be close enough to the reference decoder. db6321603fcd93c289626f5153cf203ceb3a6996 Brian Langenberger bjl@usa.net bae9ce2afdc715e00e2df572cfffad051d487906 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/83ab59059a2e14781e14c623a2d99f00342d171a 83ab59059a2e14781e14c623a2d99f00342d171a

2009-12-08T08:22:30-08:00

Handle wasted bits-per-sample properly. 5fc28664fc3bee0f81c9dad7c438bd5392c36135 Brian Langenberger bjl@usa.net ee27973f6a15901d436e7801a7c14c1d58076e66 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/bae9ce2afdc715e00e2df572cfffad051d487906 bae9ce2afdc715e00e2df572cfffad051d487906

2009-12-08T08:09:48-08:00

Add support for VERBATIM subframes. 8aac1043459b0d6d64580f731a3a41dd410248de Brian Langenberger bjl@usa.net cb85acbb8e970bb097455d8b1205d2d50460b643 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/ee27973f6a15901d436e7801a7c14c1d58076e66 ee27973f6a15901d436e7801a7c14c1d58076e66

2009-12-08T07:54:53-08:00

Add proper frame number handling and fixed mid-size channel assignment. 737bdeeba46f6221ea2e407c308f7dd71634a6c1 Brian Langenberger bjl@usa.net 3d30c605784c1d28e50b9ac4516f825c458260e8 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/cb85acbb8e970bb097455d8b1205d2d50460b643 cb85acbb8e970bb097455d8b1205d2d50460b643

2009-12-08T07:03:55-08:00

Add left-difference, difference-right and mid-side channel assignments. 7216a2d2a14e34de96b4fbeb0e6b6f9059dd093b Brian Langenberger bjl@usa.net 3f7b00783cc4fcd4923db013fc987016f3e4a07b Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/3d30c605784c1d28e50b9ac4516f825c458260e8 3d30c605784c1d28e50b9ac4516f825c458260e8

2009-12-08T06:21:06-08:00

Rename i_array functions to something more sensible. c00709ba1b43376fcae3b265744123e137fdc300 Brian Langenberger bjl@usa.net 02572b0c3fed9f4ace39702a2f546e1110650a8c Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/3f7b00783cc4fcd4923db013fc987016f3e4a07b 3f7b00783cc4fcd4923db013fc987016f3e4a07b

2009-12-07T11:39:55-08:00

Add subframe string generation. 8b0f484c687c5f03a422d6ad2ca70be19681dc44 Brian Langenberger bjl@usa.net 24d20f2d762f14343015d9030aaf221b2875bd05 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/02572b0c3fed9f4ace39702a2f546e1110650a8c 02572b0c3fed9f4ace39702a2f546e1110650a8c

2009-12-07T10:16:27-08:00

Add LPC subframe calculation. 93c7f96ceebaca981999e7db0a075d6b9090ffa0 Brian Langenberger bjl@usa.net 86091da7ac0a5301e62bb0cdf363d152995cd2a8 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/24d20f2d762f14343015d9030aaf221b2875bd05 24d20f2d762f14343015d9030aaf221b2875bd05

2009-12-07T09:25:21-08:00

Add FIXED subframe sample calculation. 109244c2f1a30cfe0f8da8a003784964bd932ecf Brian Langenberger bjl@usa.net 92944418c3b38b5afe733f375d9c9946d0714784 Brian Langenberger brian@laptop.(none) http://github.com/tuffy/python-audio-tools/commit/86091da7ac0a5301e62bb0cdf363d152995cd2a8 86091da7ac0a5301e62bb0cdf363d152995cd2a8

2009-12-06T17:06:40-08:00

Add support for handling difference channel bits correctly. 97ff3a2bed6b1c34164dd139c499386432a72b6b Brian Langenberger brian@laptop.(none) 9ae4ab605e09e8658ede14fb6eee3a57aea870cc Brian Langenberger brian@laptop.(none) http://github.com/tuffy/python-audio-tools/commit/92944418c3b38b5afe733f375d9c9946d0714784 92944418c3b38b5afe733f375d9c9946d0714784

2009-12-06T13:23:24-08:00

Add LPC subframe reader. 70200d1b889cf286a077714d3b9cc3b055b09aa6 Brian Langenberger brian@laptop.(none) 93a719794a06119178b471f3d182b0cd4dbfe370 Brian Langenberger brian@laptop.(none) http://github.com/tuffy/python-audio-tools/commit/9ae4ab605e09e8658ede14fb6eee3a57aea870cc 9ae4ab605e09e8658ede14fb6eee3a57aea870cc

2009-12-06T12:59:41-08:00

Add byte alignment and CRC-16 reading. ecfb2e22f4c57f70ae41b231182152099fea9794 Brian Langenberger brian@laptop.(none) 57c99bdb253afd4030773f8ad90bfbf25a4a28fe Brian Langenberger brian@laptop.(none) http://github.com/tuffy/python-audio-tools/commit/93a719794a06119178b471f3d182b0cd4dbfe370 93a719794a06119178b471f3d182b0cd4dbfe370

2009-12-06T12:13:43-08:00

Add residual reading function. 9ff2c26819ad2b327309d5dbc577359979b87389 Brian Langenberger brian@laptop.(none) 6c1cd66cbea401afda8e890529657fbc92b9cb4c Brian Langenberger brian@laptop.(none) http://github.com/tuffy/python-audio-tools/commit/57c99bdb253afd4030773f8ad90bfbf25a4a28fe 57c99bdb253afd4030773f8ad90bfbf25a4a28fe

2009-12-05T15:37:17-08:00

Numerous additions to the FLAC decoder. f30442dca4fc0152315d4d61a55d754ac3ffeb1b Brian Langenberger brian@laptop.(none) 3368e5af5a27945315de16343ed1efecb956e4a6 Brian Langenberger brian@laptop.(none) http://github.com/tuffy/python-audio-tools/commit/6c1cd66cbea401afda8e890529657fbc92b9cb4c 6c1cd66cbea401afda8e890529657fbc92b9cb4c

2009-12-05T08:55:02-08:00

Preliminary frame header reading in place. 1dc4c07775cf49da785171c68ad2bfbc26443491 Brian Langenberger brian@laptop.(none) 89d2573795ec2a425c651525ba3d40ab8ad7e09c Brian Langenberger brian@laptop.(none) http://github.com/tuffy/python-audio-tools/commit/3368e5af5a27945315de16343ed1efecb956e4a6 3368e5af5a27945315de16343ed1efecb956e4a6

2009-12-05T06:49:21-08:00

Split FLAC-specific decoding into seperate files. da47b91b0344531c2d56533262dc35f64d2045b2 Brian Langenberger brian@laptop.(none) beb530336cddfc13ac299517e0433be023253c61 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/89d2573795ec2a425c651525ba3d40ab8ad7e09c 89d2573795ec2a425c651525ba3d40ab8ad7e09c

2009-12-04T17:18:20-08:00

Add bitstream header file. d9121f908e969ba50cfca199c91d0f34ec344fb9 Brian Langenberger bjl@usa.net 845154ca5e8c43d724c12f471d0108608b5b4969 edcd114e69835a04be42ae877a8f7c3ce8717274 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/beb530336cddfc13ac299517e0433be023253c61 beb530336cddfc13ac299517e0433be023253c61

2009-12-04T16:10:23-08:00

Merge branch 'master' of chuckleb-hugo.dyndns.org:audiotools Conflicts: src/bitstream.c e0849462979ed98cd11c88c4094bbd332920112d Brian Langenberger bjl@usa.net 0729abb1c6fed095016708489a04d9374bbe66c5 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/edcd114e69835a04be42ae877a8f7c3ce8717274 edcd114e69835a04be42ae877a8f7c3ce8717274

2009-12-04T10:20:07-08:00

Add proper STREAMINFO reading to C-based FLAC decoder. c2e34b644d9c605239ffda791eee825d0d4ade3c Brian Langenberger bjl@usa.net 54b0e71e60d13a9878eb32beae52989461e340f3 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/0729abb1c6fed095016708489a04d9374bbe66c5 0729abb1c6fed095016708489a04d9374bbe66c5

2009-12-04T09:29:23-08:00

Integrate bitstream reader into decoder. This is state-machine based and should hopefully be faster than performing the bit shifting on a per-bit basis. acf2b4195123d6f9f6001da4b9b95f73c18771a8 Brian Langenberger bjl@usa.net b299ac9a0b65835d84cab2e8a0d7e7868b7b081c Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/54b0e71e60d13a9878eb32beae52989461e340f3 54b0e71e60d13a9878eb32beae52989461e340f3

2009-12-03T11:41:48-08:00

Very preliminary support for audio format decoders implemented in C. The purpose if this is twofold. Primarily, this reimplementation is an instructional exercise meant to demonstrate format decoding in a simple, easy-to-understand fashion. Secondarily, these built-in decoders can cut down on the use of external binaries. Although implementing audio decoders in Python works well for the former, it's far too slow for the latter - in spite of any attempts at optimiziation. I've tried to use other high-level languages for this task as a sort of sister project, but none of them are fast enough. If successful, I'll move on to format encoders later on. dd3c933b17e0fbaac637a38c8fac2647a33d9c8a Brian Langenberger bjl@usa.net 9617af4535fa0034d7d4aaf16916b4b1544a3684 Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/845154ca5e8c43d724c12f471d0108608b5b4969 845154ca5e8c43d724c12f471d0108608b5b4969

2009-11-08T09:58:30-08:00

Add miscellanous methods to new BitstreamReader object. 694a11eda7fb4088a771535740eabcb2871a4a74 Brian Langenberger bjl@usa.net