AC3DSPContext.ac3_max_msb_abs_int16() finds the maximum MSB of the absolute
value of each element in an array of int16_t.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
Some MPEG4 cameras produce files with empty GOP headers.
This patch makes the decoder ignore such broken headers and proceed
with the following I-frame. Without this change, the following
start code is missed resulting in the entire I-frame being skipped.
Signed-off-by: Mans Rullgard <mans@mansr.com>
This fixes visual glitches in Bink version 'b' files, as the quantization
tables were not being permuted.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Using doubles make the double -> int cast well defined for all the values
used, with the exception of when s[i]==1.0, which is special-cased.
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 47d62c965b7bcf4715127fbf9bffab7b4c5c88b7)
Approximately 5% faster on Cortex-A8.
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit a7878c9f73c12cfa685bd8af8f3afcca85f56a8b)
Approximately 3% faster on Cortex-A8.
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 7da48fd0111adf504cfcfc5ebda7fd0681968041)
Based on original patch by Kostya Shishkov
Signed-off-by: Janne Grunau <janne-ffmpeg@jannau.net>
(cherry picked from commit e00f41d5742b3a0dc1877b030f4f6f58c19b7bbd)
Using doubles make the double -> int cast well defined for all the values
used, with the exception of when s[i]==1.0, which is special-cased.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Merge find_near_mvs and mv bitstream decoding: don't do prediction steps
until absolutely necessary.
(cherry picked from commit f3d09d44b70492022964e2ead5f439bb7c96eaa2)
s->windowed_samples will always have a range of [-32767,32767] due to the
window function, so the return value from log2_tab() will always be in the
range [0,14].
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 626264b11b5406c0c78c4056cabb63cb650e9bf2)
This avoids double semicolons after macro expansion.
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 44adbebe1744c68d66d7f811c38270fdcc89665a)
Instead of returning an error when bytes are left over, just return
the number of actually used bytes as other decoders do.
Instead add a special case so an error will be returned when none
of the data looks valid to avoid making debugging a pain.
Signed-off-by: Janne Grunau <janne-ffmpeg@jannau.net>
(cherry picked from commit 4a72765a1c94b05bd3053b1f34f8457a3b71d714)
The function return type is void, so a return statement with an
expression is forbidden (and pointless).
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit b4668274b944abae61759e796c5cc36ade510f24)
The avcodec_thread_free() compatibility wrapper calls ff_thread_free(),
which is not defined when threading is disabled. Make this call
conditional.
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 9a77a92c2b6855781d2a4cfab14c67ae4025760c)
This should fix building with win32 threads.
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit aef669cdfd984a737ad876b33ee1b160f87f5f9a)
check AVCodecContext->sample_fmt against AVCodec->sample_fmts[] to ensure
that the encoder supports the specified sample format. Error out if it doesn't.
Previously, it would continue and output garbage. Fixes issue 2587.
(cherry picked from commit 2cfa2d925808e6cc6fb7a7c133b7cb7622afd37e)
Decode times for big_buck_bunny_720p_stereo:
1 thread:
real 1m14.227s
user 1m13.104s
sys 0m1.108s
2 threads: (33% faster)
real 0m49.329s
user 1m33.735s
sys 0m1.834s
3 threads: (44% faster)
real 0m41.593s
user 1m44.884s
sys 0m1.967s
(cherry picked from commit d23845f311f04e98777612cae1b55e28923ccdc6)
As a side effect of the last commit, avcodec_open() now calls it automatically,
so there is no longer any need for clients to call it.
Instead they should set AVCodecContext.thread_count.
avcodec_thread_free() is deprecated, and will be removed from avcodec.h at the
next MAJOR libavcodec bump.
Rename the functions to ff_thread_init/free, since they are now internal.
Wrappers are provided to maintain API compatibility.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
(cherry picked from commit c0b102ca03fe92250f1ce620aec3836f529fc1d6)
s->windowed_samples will always have a range of [-32767,32767] due to the
window function, so the return value from log2_tab() will always be in the
range [0,14].
Signed-off-by: Mans Rullgard <mans@mansr.com>
Instead of returning an error when bytes are left over, just return
the number of actually used bytes as other decoders do.
Instead add a special case so an error will be returned when none
of the data looks valid to avoid making debugging a pain.
Signed-off-by: Janne Grunau <janne-ffmpeg@jannau.net>
The avcodec_thread_free() compatibility wrapper calls ff_thread_free(),
which is not defined when threading is disabled. Make this call
conditional.
Signed-off-by: Mans Rullgard <mans@mansr.com>
