libyami/NEWS at master · TangXinT/libyami · GitHub

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libyami NEWS -- summary of changes.  2014-11-28
Copyright (C) 2010-2011 Splitted-Desktop Systems
Copyright (C) 2011 Collabora
Copyright (C) 2011-2014 Intel Corporation

libyami 0.1.4 release
=====================

features update
---------------
    -   Additional fixes(most are thread race condition) for v4l2 wrapper (egl/gles)
    -   Add glx support in v4l2 wrapper
    -   Basic transcoding support: encoder test accepts input data from decoder output
    -   Testscript is added, it supports one-run-for-all: with a folder including h264/vp8/jpeg/raw-ref,
        we can test them in one run. It serves as BAT (basic acceptance test) for pull request merge.
    -   Report fps in decode test, support decoding only test (skip rendering)
    -   Vp8/jpeg are supported in v4l2 decoder as well
    -   Decode test can be built/run without X11
    -   Code refinement for decoder test output and encoder classes
    -   dma_buf fixes, when video frame is exported as dma_buf, it renders well as texture
    -   with additional patch for chrome:
        V4L2VDA/V4L2VEA pass chrome video unit test
        video playback in browser draft ok
    -   for v4l2 wrapper, see: https://github.com/halleyzhao/yami-share/blob/master/Yami_V4L2_wrapper_for_Chrome.pdf

known issues
---------------
    -   this release is fully tested by validation team
    -   some jpeg file similarity <0.99 (~0.98) after decoding
            https://github.com/01org/libyami/issues/108

future release plan:
====================
    Dec: v0.2
        jpeg encoder
        vp9 decoder
        vp8 encoder (depends on driver availability)
        initial ffmpeg support

    Feb'15: v0.3
        unified input/output buffer of yami
        transcoding support with unified input/output buffer
        camera dma_buf support, camera with jpeg input
        use yami in ffmpeg for hw codec

    Future:
        h265 decoder


Libyami 0.1 release note
===========================

Libyami is core video library to accelerate decoding/encoding based on libva.
Libyami can be treated as development kit for VAAPI. It is developed by C++ language, with simple/efficient APIs, without external dependencies.
libyami targets two type of usage:
    - Hardware accelerated codec is the major gap (there is existing media framework ), for example: Chromeos/Android, maybe ffmpeg.
    - Usage is simple enough that codec is the major interest, for example: remote desktop client/server, video surveillance.
So far H.264 decode/encode, VP8 and JPEG decode are supported. VP8/JPEG encode support is under development.

There are rich tests/examples in yami for a try. The tests can run without Window system (X11/Wayland etc),
some modes of video output are supported: including raw data dump and some modes of texture (TFP, drm flink name, dma_buf).

More details see: https://github.com/01org/libyami/wiki

Known issues:
    some jpeg file similarity <0.99 (~0.98) after decoding
        https://github.com/01org/libyami/issues/108
    playback performance through gst-omx is not good:
        https://github.com/01org/libyami/issues/34
    Encodeing quality through gst-omx is not good:
        https://github.com/01org/libyami/issues/36

       legacy codec: mpeg2 decoder/encoder, vc1 decoder, mpeg4/h263 decoder/encoder