FFmpeg

Commit Graph

Author	SHA1	Message	Date
Alex Converse	712209d567	Base downsampled SBR synthesis filterbank on a single IMDCT. Based on Han-Wen Hsu, et al. "Fast Complex Quadrature Mirror Filterbanks for MPEG-4 HE-AAC" Originally committed as revision 23519 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	388c795531	10l: Fix types and now unused variables after last commit. Originally committed as revision 23517 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	932963b8e2	Rewrite the SBR decoder QMF analysis filter on top of the IMDCT instead of the RDFT. This is based on a procedure to implement the filterbank on the DCT-IV described in Hsu, H.W. et al. "A Complex Quadrature Mirror Filterbanks for MPEG-4 HE-AAC" http://sites.google.com/site/wenchiehlee1020/Papers/ComplexFB_AES_121paper144.pdf Originally committed as revision 23516 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	dd8871a63b	aacdec: Rename avccontext to avctx. Originally committed as revision 23488 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	17d5959998	10l: The SBR refactor requires the use of 2 independent output X buffers. Originally committed as revision 23014 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	2d23fecd5d	Enforce time border monotonicity. Thanks to Chromium. Originally committed as revision 23000 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	a91d82b5cc	Move the SBR patch count check to prevent overwrites. Thanks to Chromium. Originally committed as revision 22999 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	10678e5c72	Increase size of patch_borders[]. 6 patches means there can be 7 borders. Found by Chromium. Originally committed as revision 22998 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	d0dedce71d	Reindent Originally committed as revision 22996 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	ca6d3f234c	Rewrite ff_sbr_apply in a manner more friendly to PS. This includes merging ff_sbr_dequant into ff_sbr_apply. Originally committed as revision 22995 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Diego Biurrun	ba87f0801d	Remove explicit filename from Doxygen @file commands. Passing an explicit filename to this command is only necessary if the documentation in the @file block refers to a file different from the one the block resides in. Originally committed as revision 22921 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	ba659bedb8	Reindent read_sbr_extension. Originally committed as revision 22820 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	73c2704608	Print an error and skip PS when PS is found but explicitly found but signaled to be absent. Originally committed as revision 22819 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	b3e5931d18	aacsbr: DSPUtilize analysis input scaling. Originally committed as revision 22516 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	f8a93a2036	aac: Don't bias output during the IMDCT if SBR will be used. Originally committed as revision 22515 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	6ebc724060	aacsbr: Check that bs_num_env is valid before writing arrays with it as an offset. Originally committed as revision 22413 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	134b8cbb9a	aacsbr: Cleanup read_sbr_grid and copy_sbr_grid after the recent overhaul of those functions. Originally committed as revision 22412 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	f7e7888b2a	aacsbr: Factor out the common end border case from t_q setup. Originally committed as revision 22411 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	ac8d655a79	aacsbr: read bs_rel_bord directly into t_env. Originally committed as revision 22410 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	ecc1f8c3c8	aacsbr: Make the previous value of bs_num_env local to read_sbr_data(). Originally committed as revision 22409 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	46751a65e3	aacsbr: Initialize e_a[1] to -1. This triggers lAPrev (e_a[0]) on the first SBR frame to be -1. The spec is somewhat ambiguous to what this value should be but this increases the accuracy of al_sbr_e_44_1 and similar streams from 14 bits to 15 bits. Originally committed as revision 22408 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	5889172087	aacsbr: Dead code removal. Originally committed as revision 22387 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	afd96c345f	aacsbr: Remove a slightly incorrect comment. The two conditions are equivalent. Originally committed as revision 22386 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	7935078623	aacsbr: Cleanup the newly merged read_sbr_grid, eliminating several context and some duplicate local variables. Originally committed as revision 22384 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	7333f849b1	aacsbr: Move the e_a calculation from sbr_mapping() to read_sbr_grid(). Originally committed as revision 22383 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	b9c3e3b6e7	aacsbr: Merge sbr_time_freq_grid into read_sbr_grid (and into copy_sbr_grid). Originally committed as revision 22382 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	ed1d112931	aacsbr: Fail early on illegal envelope counts. Originally committed as revision 22381 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	8a9ee4b102	aacsbr: Check for illegal values of bs_pointer in sbr_read_grid(). Originally committed as revision 22380 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	bf3d904c3d	10l: Include missing return values in functions made non-void by the previous commit. Originally committed as revision 22376 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	58b1cba0c9	aacsbr: Propagate errors from read_sbr_grid to prevent crashes in malformatted streams. Originally committed as revision 22375 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Georgi Chorbadzhiyski	e0be763052	Add a missing fft.h include to the aacsbr decoder. Patch by Georgi Chorbadzhiyski gf at unixsol dot org Originally committed as revision 22374 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	ed492b61db	Add an HE-AAC v1 decoder. A large portion of this code was orignally authored by Robert Swain. The rest was written by me. Full history is available at: svn://svn.ffmpeg.org/soc/aac-sbr http://github.com/aconverse/ffmpeg-heaac/tree/sbr_pub Originally committed as revision 22316 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago

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101 Commits (6db42a2b6b22e6f1928fafcf3faa67ed78201004)