On 11/25/22, Paul B Mahol <one...@gmail.com> wrote: > On 10/11/22, Martijn van Beurden <mva...@gmail.com> wrote: >> Recently libFLAC gained the ability (first released in FLAC 1.4.0) >> to create FLAC files containing 32-bit int PCM samples. To >> keep complexity reasonable, the choice was made to limit residuals >> to 32-bit integers, which the encoder must make sure of. In case >> the encoder cannot find any predictor of which the residuals fit >> this limit, it must default to using a verbatim subframe. Tests have >> shown that this does not happen often (<0.1% of subframes on a >> music corpus of various styles). See also discussion here: >> https://github.com/ietf-wg-cellar/flac-specification/pull/148 >> >> These two patches implement decoding and encoding following this >> format. >> >> Changes since v1: >> fix copy-paste error in encoder, several invocations of >> lpc_encode_choose_datapath used wrong parameters, making FATE fail as >> compression was less than it should be >> >> Changes since v2: >> Rebased decoder part as it didn't apply anymore >> >> Changes since v3: >> Moved put_golomb part to flacenc.c (as it is now quite specific to FLAC) >> and renamed put_sbits64 to put_sbits63 (and changed assert accordingly) >> >> Changes since v4: >> Fix check of decoded_buffer_33bps malloc. Fix reading of wasted bits >> for 33bps subframe. Add fate test >> >> Changes since v5: >> Slimmed down 32 bps fate flac test from 2 to 1 input file. Replaced >> -strict -2 with -strict experimental in fate and encoder warning. >> >> Changes since v6: >> Deduplicated function bodies with preprocessor macros in both >> encoder and decoder, declared variables in loop body where possible >> and changed ff_ctz to ff_ctzll where necessary >> >> Martijn van Beurden (3): >> libavcodec/flacdec: Implement decoding of 32 bit-per-sample PCM >> libavcodec/flacenc: Implement encoding of 32 bit-per-sample PCM >> fate/flac: Add test of 32 bps encoding/decoding >> >> libavcodec/flac.c | 4 +- >> libavcodec/flacdec.c | 218 ++++++++++++++++-- >> libavcodec/flacenc.c | 480 +++++++++++++++++++++++++++++++--------- >> libavcodec/get_bits.h | 12 + >> libavcodec/mathops.h | 9 + >> libavcodec/put_bits.h | 7 + >> libavcodec/put_golomb.h | 14 -- >> tests/fate/flac.mak | 4 + >> 8 files changed, 602 insertions(+), 146 deletions(-) >> >> -- >> 2.30.2 >> > > > > If this is OK, will apply soon.
Last time to say no to this patchset. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
