GCC 12 apparently believes that negative palette sizes are
possible (they are not, as this has already been checked during
init) and therefore emits a -Wstringop-overflow= for the memcpy.
Using unsigned avoids this.
(To be honest, there might be a compiler bug involved.)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This might be useful in case this decoder were changed to support
new extradata passed via side-data.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This code is only called once during init, so none of the buffers
here have been allocated already.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
183132872a made the iff demuxer
output extradata and made the decoder parse said extradata.
To make this extradata extensible, it came with its own internal
length field (containing the offset of the palette at the end
of the extradata). Furthermore, in order to support mid-stream
extradata changes, the packets returned by the demuxer also have
such a length field (containing the offset of the actual packet
data). Therefore the packet parsing the extradata accepted its
input from both AVPackets as well as from ordinary extradata.
Yet the demuxer never made use of this "feature": The packet's
length field always indicated that the packet data starts
immediately after the length field.
Later, commit cb928fc448 stopped
appending the length field to the packets' data; of course,
it also stopped searching for extradata in this data.
Instead it added code to parse the packet's header to the function
that parses extradata. This made this function consist of two disjoint
parts, one of which is only reachable if this function is called
from init (when parsing extradata) and one of which is reachable
when parsing packet headers.
Therefore this commit splits this function into two.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Otherwise the buffer might be too small. Fixes assert violations
when encoding mono audio with exactly one sample.
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
If a developer using FFmpeg libraries seeks into an earlier position and calls
avcodec_flush_buffers() afterwards as recommended, the Vorbis decoder will drop
the next frame, since buffer flushing clears the first_frame flag. As a result,
the audio samples the calling code receives may be ahead of the requested seek
position, which is unacceptable in some use cases such as playing a looping
sound effect.
This commit records the presentation timestamp of the first frame and
determines after that if the new frame is the first frame (possible after
seeking to the start) by comparing its pts to the stored pts.
This reverts commit 2c8dc7e953.
The loongarch headers have been fixed, so that this wrapper
is no longer necessary.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This reverts commit 6c9a60ada4.
The loongarch headers have been fixed, so that this workaround
is no longer necessary.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
When compiling FFmpeg with GCC-9, some very random segfaults were
observed in code which had previously called down into the SBC encoder
NEON assembly routines. This was caused by these functions clobbering
some of the vfp callee saved registers (d8 - d15 aka q4 - q7). GCC was
using these registers to save local variables, but after these
functions returned, they would contain garbage.
Fix by reallocating the registers in the two affected functions in
the following way:
ff_sbc_analyze_4_neon: q2-q5 => q8-q11, then q1-q4 => q8-q11
ff_sbc_analyze_8_neon: q2-q9 => q8-q15
The reason for using these replacements is to keep closely related
sets of registers consecutively numbered which hopefully makes the
code more easy to follow. Since this commit only reallocates
registers, it should have no performance impact.
Signed-off-by: James Cowgill <jcowgill@debian.org>
Signed-off-by: Martin Storsjö <martin@martin.st>
Also fixes a "statement with no effect [-Wunused-value]"
warning from GCC.
Reviewed-by: James Almer <jamrial@gmail.com>
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
It is not needed on x64, because the AV_COPY* and AV_ZERO*
macros never use MMX on x64.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Reviewed-by: Peter Ross <pross@xvid.org>
Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
It is only an auxiliary value used for parsing the VP7 frame header.
Reviewed-by: Peter Ross <pross@xvid.org>
Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Forgotten in d6f8476be4.
Reviewed-by: Peter Ross <pross@xvid.org>
Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Provide optimized implementation for vsse_intra16 for arm64.
Performance tests are shown below.
- vsse_4_c: 155.2
- vsse_4_neon: 36.2
Benchmarks and tests are run with checkasm tool on AWS Graviton 3.
Signed-off-by: Hubert Mazur <hum@semihalf.com>
Signed-off-by: Martin Storsjö <martin@martin.st>
Provide optimized implementation for vsad_intra16 function for arm64.
Performance comparison tests are shown below.
- vsad_4_c: 177.5
- vsad_4_neon: 23.5
Benchmarks and tests are run with checkasm tool on AWS Gravtion 3.
Signed-off-by: Hubert Mazur <hum@semihalf.com>
Signed-off-by: Martin Storsjö <martin@martin.st>
Provide optimized implementation of vsse16 for arm64.
Performance comparison tests are shown below.
- vsse_0_c: 257.7
- vsse_0_neon: 59.2
Benchmarks and tests are run with checkasm tool on AWS Graviton 3.
Signed-off-by: Hubert Mazur <hum@semihalf.com>
Signed-off-by: Martin Storsjö <martin@martin.st>
Provide optimized implementation of vsad16 function for arm64.
Performance comparison tests are shown below.
- vsad_0_c: 285.2
- vsad_0_neon: 39.5
Benchmarks and tests are run with checkasm tool on AWS Graviton 3.
Co-authored-by: Martin Storsjö <martin@martin.st>
Signed-off-by: Hubert Mazur <hum@semihalf.com>
Signed-off-by: Martin Storsjö <martin@martin.st>
Add "slice" intra refresh type to h264_qsv and hevc_qsv. This type means
horizontal refresh by slices without overlapping. Also update the doc.
Signed-off-by: Wenbin Chen <wenbin.chen@intel.com>
The latest commit of Loongson MMI macro replaces were incorrect.
It makes a mass of green tints on HEVC videos when playing. I've
compared it with the older MMI implementation, and found out that
several lines have been replaced by wrong macros.
Signed-off-by: Qi Tiezheng <qitiezheng@360.cn>
Reviewed-by: Shiyou Yin <yinshiyou-hf@loongson.cn>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
AV_PIX_FMT_VUYX is used in FFmpeg and MFX_FOURCC_AYUV is used in the SDK
Reviewed-by: Philip Langdale <philipl@overt.org>
Signed-off-by: Haihao Xiang <haihao.xiang@intel.com>
Currently AVBR is disabled and VBR is the default method if maxrate is
not specified on Linux, but AVBR is the default one if maxrate is not
specified on Windows. In order to make user experience better accross
Linux and Windows, use VBR by default on Windows if maxrate is not
specified. User need to set both avbr_accuracy and avbr_convergence to
non-zero explicitly and not to specify maxrate if AVBR is expected.
In addition, AVBR works for H264 and HEVC only in the SDK.
$ ffmpeg.exe -v verbose -f lavfi -i yuvtestsrc -vf "format=nv12" -c:v
vp9_qsv -f null -
The FFV1 decoder only uses the last frame's data to conceal
errors. The encoder does not have this problem and therefore
only uses the current frame and none of the ThreadFrames.
So only allocate them for the decoder.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
By using a symbol table one can already bake in applying
a LUT on the return value of get_vlc2(). So change the
symbol table for the vec2 and vec4 tables to avoid
using the symbol_to_vec2/4 LUTs.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
It allows to replace tables of big codes (uint16_t and uint32_t)
by tables of smaller symbols (mostly uint8_t).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
These codes are already ordered from left-to-right in the tree,
so one can just use ff_init_vlc_static_from_lengths().
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Paul B Mahol
Andreas Rheinhardt
Jyrki Vesterinen
James Cowgill
Michael Niedermayer
Hubert Mazur
Wenbin Chen
Qi Tiezheng
Haihao Xiang