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* avcodec/jpegtables: remove duplicate luma and chroma quantization tablesPeter Ross2022-10-261-27/+0
| | | | | | Duplicates of the standard JPEG quantization tables were found in the AGM, MSS34(dsp), NUV and VP31 codecs. This patch elimates those duplicates, placing a single copy in jpegquanttables.c.
* avcodec/jpegtables: Unavpriv MJPEG-tablesAndreas Rheinhardt2022-01-041-65/+1
| | | | | | | | | | | | | | | | There are seven MJPEG-tables, five small (1x12, 4x17) and two not small (2x162). These are all avpriv, despite this not being worthwhile due to the overhead of exporting a symbol: The total overhead for each symbol consists of two entries in .dynsym (24B each), one entry in the importing library's .rela.dyn (24B) and one in .got (8B) as well as 2x2B for symbol versions and 4B for symbol hashes in the exporting library; in addition to that, the name of the symbol is included in both exporting and importing libraries, using 2x210 bytes in this case. (The above numbers are for a x64 Elf/Linux/GNU system. Other platforms will give different numbers.) Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
* avcodec/jpegtables: Move ff_mjpeg_build_huffman_codes to mjpegenc_commonAndreas Rheinhardt2021-02-231-21/+0
| | | | | | | Since g2meet.c doesn't use it any more, only encoders use it and the place for their common code is mjpegenc_common.c. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
* avcodec/mjpegdec: improve decoding of DNG filesPaul B Mahol2020-10-071-13/+2
| | | | That have unused symbols coded in DHT.
* lavc/jpegtables: Handle multiple mappings to the same valueNick Renieris2019-09-021-3/+14
| | | | | | | | | | | | | | | | | | | Some JPEGs [1] have incorrect DHT entries that map 2 codes to the same value. The second (last) mapping does not ever actually appear in the code stream, therefore ignoring any mappings after the first one fixes this. Without this, an "mjpeg_decode_dc: bad vlc: 0:0" error is thrown. In all known files, the 2 codes are mapped to symbol 0 so only that case is checked. [1]: Embedded JPEGs in "X7 RAW" and "X7 CinemaDNG" samples here: https://www.dji.com/gr/zenmuse-x7/info#downloads Signed-off-by: Nick Renieris <velocityra@gmail.com>
* Merge commit '4978850ca2cb1ec6908f5bc79cc592ca454d11e8'Michael Niedermayer2015-03-311-6/+6
| | | | | | | | | | * commit '4978850ca2cb1ec6908f5bc79cc592ca454d11e8': build: Split JPEG-related tables off into a separate component Conflicts: configure Merged-by: Michael Niedermayer <michaelni@gmx.at>
* build: Split JPEG-related tables off into a separate componentDiego Biurrun2015-03-301-0/+145
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