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* avcodec/vlc: Use structure instead of VLC_TYPE array as VLC elementAndreas Rheinhardt2022-06-17
| | | | | | | | | | | | | | | | | | In C, qualifiers for arrays are broken: const VLC_TYPE (*foo)[2] is a pointer to an array of two const VLC_TYPE elements and unfortunately this is not compatible with a pointer to a const array of two VLC_TYPE, because the latter does not exist as array types are never qualified (the qualifier applies to the base type instead). This is the reason why get_vlc2() doesn't accept a const VLC table despite not modifying the table at all, as there is no automatic conversion from VLC_TYPE (*)[2] to const VLC_TYPE (*)[2]. Fix this by using a structure VLCElem for the VLC table. This also has the advantage of making it clear which element is which. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
* avcodec/codec_internal: Use union for FFCodec decode/encode callbacksAndreas Rheinhardt2022-04-05
| | | | | | | | | | | This is possible, because every given FFCodec has to implement exactly one of these. Doing so decreases sizeof(FFCodec) and therefore decreases the size of the binary. Notice that in case of position-independent code the decrease is in .data.rel.ro, so that this translates to decreased memory consumption. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
* avcodec/codec_internal: Make FFCodec.decode use AVFrame*Andreas Rheinhardt2022-04-05
| | | | | | | | This increases type-safety by avoiding conversions from/through void*. It also avoids the boilerplate "AVFrame *frame = data;" line for non-subtitle decoders. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
* avcodec/codec_internal: Add FFCodec, hide internal part of AVCodecAndreas Rheinhardt2022-03-21
| | | | | | | | | | | | | | | | Up until now, codec.h contains both public and private parts of AVCodec. This exposes the internals of AVCodec to users and leads them into the temptation of actually using them and forces us to forward-declare structures and types that users can't use at all. This commit changes this by adding a new structure FFCodec to codec_internal.h that extends AVCodec, i.e. contains the public AVCodec as first member; the private fields of AVCodec are moved to this structure, leaving codec.h clean. Reviewed-by: Anton Khirnov <anton@khirnov.net> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
* avcodec/internal: Move FF_CODEC_CAP_* to a new header codec_internal.hAndreas Rheinhardt2022-03-21
| | | | | | | | | | Also move FF_CODEC_TAGS_END as well as struct AVCodecDefault. This reduces the amount of files that have to include internal.h (which comes with quite a lot of indirect inclusions), as e.g. most encoders don't need it. It is furthemore in preparation for moving the private part of AVCodec out of the public codec.h. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
* qdmc: convert to new channel layout APIAnton Khirnov2022-03-15
| | | | Signed-off-by: James Almer <jamrial@gmail.com>
* avcodec/qdmc: switch to fft from lavu/txPaul B Mahol2022-02-12
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* avcodec: Constify AVCodecsAndreas Rheinhardt2021-04-27
| | | | | | | | | | Given that the AVCodec.next pointer has now been removed, most of the AVCodecs are not modified at all any more and can therefore be made const (as this patch does); the only exceptions are the very few codecs for external libraries that have a init_static_data callback. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> Signed-off-by: James Almer <jamrial@gmail.com>
* avcodec/qdmc: Mark decoder as init-threadsafeAndreas Rheinhardt2020-12-31
| | | | | | | It already uses ff_thread_once() to initialize its static data. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
* avcodec: set AV_CODEC_CAP_CHANNEL_CONF on decoders which set their own channelsHendrik Leppkes2020-12-10
| | | | | | | | | | | | The decoders in this set either have a fixed channel count, or read it from the bitstream, and thus do not require the channel count as external information. Fixes various regressions since 81503ac58a763a36b1f57264013b1e76acb62b68, which requires a valid channel count for decoders which do not set this capability. Signed-off-by: Hendrik Leppkes <h.leppkes@gmail.com>
* avcodec/qdmc: Avoid code duplication when initializing VLCAndreas Rheinhardt2020-12-08
| | | | Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
* avcodec/qdmc: Apply offset when creating VLCAndreas Rheinhardt2020-12-08
| | | | Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
* avcodec/qdmc: Make tables used to initialize VLCs smallerAndreas Rheinhardt2020-12-08
| | | | | | | | | This is possible by switching to ff_init_vlc_from_lengths() which allows to replace tables of codes of size uint16_t or uint32_t by tables of symbols of size uint8_t; in case there already were symbols tables the savings are even bigger. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
* avcodec/qdmc: Don't check for errors for complete VLCsAndreas Rheinhardt2020-11-24
| | | | Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
* avcodec/qdmc: reduce insanely huge tablesPaul B Mahol2020-08-21
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* avcodec/qdmc: Check input space in qdmc_get_vlc()Michael Niedermayer2019-10-12
| | | | | | | | | Fixes: Timeout (125sec -> 0.4sec) Fixes: 18059/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QDMC_fuzzer-5656195825664000 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
* avcodec/qdmc: Fix integer overflows in PRNGMichael Niedermayer2019-06-26
| | | | | | | | Fixes: signed integer overflow: 214013 * 2531011 cannot be represented in type 'int' Fixes: 15254/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QDMC_fuzzer-5698137026461696 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
* avcodec/qdmc: check return code of ff_fft_init()Paul B Mahol2018-09-08
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* avcodec: do not use init_static_data on some codecsMuhammad Faiz2018-02-04
| | | | | | | | | | | | | | They don't modify AVCodec, no needs to call it at register. They will be wasteful if these codecs are unused. Instead, call static data initialization at codecs' init. Benchmark: old: 51281340 decicycles in avcodec_register_all, 1 runs, 0 skips new: 6738960 decicycles in avcodec_register_all, 1 runs, 0 skips Reviewed-by: wm4 <nfxjfg@googlemail.com> Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
* avcodec/qdmc: silence gcc 6.2.0 warningPaul B Mahol2017-02-10
| | | | Signed-off-by: Paul B Mahol <onemda@gmail.com>
* avcodec: add QDMC decoderPaul B Mahol2017-01-06
Signed-off-by: Paul B Mahol <onemda@gmail.com>
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