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initialize directory structure and readme file for the whole project
git-svn-id: https://10.10.10.66:8443/svn/MediaProcessPlatform/trunk/mpp@1 6e48237b-75ef-9749-8fc9-41990f28c85a
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ChenHengming
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readme.txt
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195
readme.txt
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Media Process Platform (MPP) module directory description:
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MPP : Media Process Platform
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MPI : Media Process Interface
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HAL : Hardware Abstract Layer
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OSAL : Operation System Abstract Layer
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Rules:
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1. header file arrange rule
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a. inc directory in each module folder is for external module usage.
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b. module internal header file should be put along with the implement file.
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c. header file should not contain any relative path or absolute path, all include path should be keep in Makefile.
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2. compiling system rule
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a. for cross platform compiling use cmake as the compiling management system.
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b. use cmake out-of-source build, final binary and library will be install to out/ directory.
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---- top
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|----- build CMake out-of-source build directory
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|----- inc header file for external usage, including platform header and mpi header
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|----- mpi Media Process Interface: the api function implement in public (vpu_api layer)
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|----- mpp Media Process Platform : mpi function private implement and mpp infrastructure (vpu_api private layer)
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| |
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| |----- dec general decoder loop module
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| |
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| |----- enc general encoder loop module
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|----- test mpi/mpp unit test files and mpi demo files
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|----- out final release binary output directory
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| |----- bin executable binary file output directory
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| |----- inc header file output directory
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| |
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| |----- lib library file output directory
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|----- hal Hardware Abstract Layer (HAL): modules used in mpi
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| |
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| |----- inc header files provided by hal for external usage
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| |
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| |----- iep iep user library
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| |
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| |----- pp post-processor user library
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| |
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| |----- rga rga user library
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| |
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| |----- deinter deinterlace function module including pp/iep/rga
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| |
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| |----- rkdec rockchip hardware decoder register generation library
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| | |
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| | |----- h264d generate register file from H.264 structure created by codec parser
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| | |
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| | |----- h265d generate register file from H.265 structure created by codec parser
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| | |
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| | |----- vp9d generate register file from vp9 structure created by codec parser
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| |
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| |----- vpu vpu register generation library
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| |
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| |----- h264d generate register file from H.264 structure created by codec parser
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| |----- h265d generate register file from H.265 structure created by codec parser
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|----- osal Operation System Abstract Layer: abstract layer for different operation system
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| |
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| |----- mem mpi memory subsystem for hardware
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| |
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| |----- android google's android
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| |
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| |----- linux mainline linux kernel
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| |
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| |----- window microsoft's window
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|----- codec all video codec parser, convert stream to protocol structure
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|----- inc header files provided by codec module for external usage
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|----- dec
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| |----- h264
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| |----- h265
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| |----- vp9
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| |
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| |----- jpeg
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|----- enc
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|----- h264
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|----- h265
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|----- jpeg
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Here is the mpp implement overall framework:
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+-------------------------+ +--------+
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| | | |
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| MPI / MPP | | |
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| buffer queue manage | | |
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+-------------------------+ | |
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| |
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+-------------------------+ | |
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| codec | | OSAL |
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| decoder / encoder | | |
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| | | |
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+-------------------------+ | |
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| |
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+-----------+ +-----------+ | |
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| | | | | |
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| parser | | HAL | | |
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| recoder | | reg_gen | | |
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+-----------+ +-----------+ +--------+
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Take H.264 deocder for example. Video stream will first queued by MPI/MPP layer, MPP will send the stream to codec layer,
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codec layer parses the stream header and generates a protocol standard output. This output will be send to HAL to generate
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register file set and communicate with hardware. Hardware will complete the task and resend information back. MPP notify
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codec by hardware result, codec output decoded frame by display order.
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MPI MPP decoder parser HAL
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+ + + + +
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| | | | |
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| open context | | | |
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+----------------> | | | |
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| | | | |
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| init | | | |
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+----------------> | | | |
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| | | | |
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| | init | | |
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| +----------------> | | |
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| | | | |
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| | | init | |
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| | +----------------> | |
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| | | | |
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| | | | open |
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| | +-----------------------------------> |
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| | | | |
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| decode | | | |
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+----------------> | | | |
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| | | | |
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| | send_stream | | |
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| +----------------> | | |
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| | | | |
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| | | parse_stream | |
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| | +----------------> | |
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| | | | |
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| | | | reg generation |
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| | +-----------------------------------> |
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| | | | |
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| | | | send_regs |
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| | +-----------------------------------> |
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| | | | |
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| | | | wait_regs |
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| | +-----------------------------------> |
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| | | | |
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| | | notify_hw_end | |
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| | +----------------> | |
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| | | | |
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| | get_picture | | |
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| +----------------> | | |
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| | | | |
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| | | get_picture | |
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| | +----------------> | |
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| | | | |
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| flush | | | |
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+----------------> | | | |
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| | | | |
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| | flush | | |
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| +----------------> | | |
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| | | | |
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| | | reset | |
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| | +----------------> | |
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| close | | | |
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+----------------> | | | |
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| | close | | |
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| +----------------> | | |
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| | | | |
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| | | close | |
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| | +----------------> | |
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| | | | close |
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| | +-----------------------------------> |
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+ + + + +
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