Adds a multiframe postprocessing module to enhance the quality of
certain frames that are coded at lower quality than preceding frames.
The module can be invoked from the commandline by use of the --mfqe
option, and will be most beneficial for enhancing the quality of
frames decoded using scalable patterns.

Uses the vp8_variance_var16x16 and vp8_variance_sad16x16 function
pointers to compute SAD and Variance of blocks.

Change-Id: Id73d2a6e3572d07f9f8e36bbce00a4fc5ffd8961

Make bilinearfilter_arm.c compiled only when HAVE_ARMV6, as its definitions
are v6 only. This is normally not a problem for static builds as the file
is elided at link time, but this was not being done properly for the
--enable-shared --enable-pic build.

Change-Id: Ic800a7cde751f74f22555c5b247f99f9df5e550d

Merged multi-resolution motion estimation with regular motion
estimation function in order to remove duplicated part. This
caused slight changes in multi-resulotion encoder quality &
performance.

Change-Id: Ib4ecc7acfebfe5eea959b5b91febae6db7b95fd1

increase size of ss_err by one to make
sure there is room for 64 elements.

Change-Id: I355cb8c499aa7da3b9675f2326a8d25a74bb88d2

The total_stats, this_frame_stats, and total_left_stats structures
were previously create by a heap allocation, despite being of fixed
size. These structures were allocated and deallocated during
{de,}allocate_compressor_data, which is reinvoked whenever the frame
size changes. Unfortunately, this clobbers the total_stats and
total_left_stats data.

Historically, these were variable size at one time, due to the first
pass motion map, which necessitated their being created by a unique
heap allocation. However, this bug with the total_stats being
clobbered has probably been present since that initial implementation.

These structures are instead moved to be stored within the struct
twopass_rc directly, rather than being heap allocated separately.

Change-Id: I7f9e519e25c58b92969071f0e99fa80307e0682b

When mb_skip_coeff is set, the idct is not necessary.  Prior
to this patch, the code would call idcts based on leftover
eob information.  This patch will now skip the idct for
SPLIT_MV and clear out the eobs for B_PRED, forcing the idct
to be skipped.

Change-Id: If5b0d2ed3ebd07789d30ec5160df927485fcaa17

These functions are now used by the encoder.
This is WIP with the goal of creating a common idct/add for
the encoder and decoder.  A boost of 1.8% was seen for
the HD rt test clip used.

[Tero] Added needed changes to ARM side.

Change-Id: Ibbb8000be09034203d7adffc457d3c3f8b06a5bf

While doing motion search on a macroblock, we usually call
vp8_find_near_mvs once per reference frame. Actually, for
different reference frames, the only difference in calculating
these near_mvs is they may have different sign_bias, which
causes a sign change in resulting near_mvs. In this change, we
only do find_near_mvs for the first reference frame. For other
reference frames, only need to adjust the near_mvs according to
that reference frame's sign_bias value.

Change-Id: I661394b49c6ad79fed7d0f2eb2be239b9c56f149

Allow targeting darwin11 / 10.7

Update arm paths for iPhoneOS 5.0

Change-Id: I057156349311ec66a163c4c1cea60dc5aeaaa492

Add the notion of deferred validation of parameters. We don't want to
validate the cq_level at initialization time, because it won't have
been set via set_param() yet.

Change-Id: Ia1308395e8c10e0b1dc4e9af3a09b2bd6744cc30

Sometimes same level is tested 2-3 times; store and reuse the
calculated error value.

Change-Id: Ia1c04a2568232edf9a5a62c4e2d8e8a50d85e00e

...regardless of the speed settings.

Change-Id: I4b91ac7a7208efd690dfc69e175f8eb769b6ce03

add check to set active_worst_quality to 127 if it
is set above 127

Change-Id: I7db353d5c1b1c8516a116542b6ed21c0110bb512

The conversion script was incorrectly matching
CONFIG_POSTPROC[_VISUALIZER] and generating an
incorrect vpx_config.asm

Match both PROC and ENDP on word boundaries

Change-Id: Ic2788c3b522d4ee0afc5223b72e1b09fb52645be

Aligned the image buffer and stride to 32 bytes. This enables
calling of optimized scaler function in libyuv, and improves
the performance.

Tested libyuv scaler(x86 optimization) on Linux and Windows,
including: Linux 32/64bit, visual studio 32/64bit, Cygwin, and
MinGW32.

Also, fixed a wrong pointer in vpx_codec_encode().

Change-Id: Ibe97d7a0a745f82c43852fa4ed719be5a4db6abc

Mach-O prefixes function calls with _

Change-Id: I778c2ab91266887731a6a0316b42af7641826da4

Change-Id: I4168eb6ea22ae541471738a7a3453e7d52059275

The previous definition of uintptr_t was incorrect on x64 with MSVC.
Also, the ARMV6 version of int_fast16_t was defined as unsigned for
some reason. Since the fast types are currently unused, just remove
them.

Change-Id: Idd73f77a989c77feedcb4a6802ae6bd37324ed40

Removed unnecessary transposes.

Change-Id: I029fbaf8afafee34d54a4f3333c22023c15003c3

Do the test filtering in the existing backup frame buffer instead of
the original. Copy the original data into extra buffer before doing
the  filtering. This way there is no need to restore the original
unfiltered  frame at the end of level picking process.

This came up in some discussions with Johann. Thanks!

Change-Id: I495f4301d983854673276c34ec0ddf9a9d622122

Added code to allocate aligned image buffer in vpx_img_alloc(). The
alignment of the buffer and stride is determined by the parameter
align.

Change-Id: Idc866978484be3558551c56df39130ab7f74ddd4

The example encoder down-samples the input video frames a number of
times with a down-sampling factor, and then encodes and outputs
bitstreams with different resolutions.

Support arbitrary down-sampling factor, and down-sampling factor
can be different for each encoding level.

For example, the encoder can be tested as follows.
1. Configure with multi-resolution encoding enabled:
../libvpx/configure --target=x86-linux-gcc --disable-codecs
--enable-vp8 --enable-runtime_cpu_detect --enable-debug
--disable-install-docs --enable-error-concealment
--enable-multi-res-encoding
2. Run make
3. Encode:
If input video is 1280x720, run:
./vp8_multi_resolution_encoder 1280 720 input.yuv 1.ivf 2.ivf 3.ivf 1
(output: 1.ivf(1280x720); 2.ivf(640x360); 3.ivf(320x180).
The last parameter is set to 1/0 to show/not show PSNR.)
4. Decode:
./simple_decoder 1.ivf 1.yuv
./simple_decoder 2.ivf 2.yuv
./simple_decoder 3.ivf 3.yuv
5. View video:
mplayer 1.yuv -demuxer rawvideo -rawvideo w=1280:h=720 -loop 0 -fps 30
mplayer 2.yuv -demuxer rawvideo -rawvideo w=640:h=360 -loop 0 -fps 30
mplayer 3.yuv -demuxer rawvideo -rawvideo w=320:h=180 -loop 0 -fps 30

The encoding parameters can be modified in vp8_multi_resolution_encoder.c,
for example, target bitrate, frame rate...

Modified API. John helped a lot with that. Thanks!

Change-Id: I03be9a51167eddf94399f92d269599fb3f3d54f5