335 lines
18 KiB
Nim
335 lines
18 KiB
Nim
#******************************************************************************
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#
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# $Id: smpeg.pas,v 1.7 2004/08/14 22:54:30 savage Exp $
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#
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#
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#
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# Borland Delphi SMPEG - SDL MPEG Player Library
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# Conversion of the SMPEG - SDL MPEG Player Library
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#
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# Portions created by Sam Lantinga <slouken@devolution.com> are
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# Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
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# 5635-34 Springhouse Dr.
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# Pleasanton, CA 94588 (USA)
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#
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# All Rights Reserved.
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#
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# The original files are : smpeg.h
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#
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# The initial developer of this Pascal code was :
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# Matthias Thoma <ma.thoma@gmx.de>
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#
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# Portions created by Matthias Thoma are
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# Copyright (C) 2000 - 2001 Matthias Thoma.
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#
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#
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# Contributor(s)
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# --------------
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# Tom Jones <tigertomjones@gmx.de> His Project inspired this conversion
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# Matthias Thoma <ma.thoma@gmx.de>
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#
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# Obtained through:
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# Joint Endeavour of Delphi Innovators ( Project JEDI )
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#
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# You may retrieve the latest version of this file at the Project
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# JEDI home page, located at http://delphi-jedi.org
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#
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# The contents of this file are used with permission, subject to
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# the Mozilla Public License Version 1.1 (the "License"); you may
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# not use this file except in compliance with the License. You may
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# obtain a copy of the License at
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# http://www.mozilla.org/MPL/MPL-1.1.html
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#
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# Software distributed under the License is distributed on an
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# "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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# implied. See the License for the specific language governing
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# rights and limitations under the License.
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#
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# Description
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# -----------
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#
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#
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#
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#
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#
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#
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#
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# Requires
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# --------
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# The SDL Runtime libraris on Win32 : SDL.dll on Linux : libSDL-1.2.so.0
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# They are available from...
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# http://www.libsdl.org .
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#
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# Programming Notes
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# -----------------
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#
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#
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#
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#
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# Revision History
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# ----------------
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# May 08 2001 - MT : Initial conversion
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#
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# October 12 2001 - DA : Various changes as suggested by David Acklam
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#
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# April 03 2003 - DL : Added jedi-sdl.inc include file to support more
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# Pascal compilers. Initial support is now included
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# for GnuPascal, VirtualPascal, TMT and obviously
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# continue support for Delphi Kylix and FreePascal.
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#
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# April 08 2003 - MK : Aka Mr Kroket - Added Better FPC support
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# Fixed all invalid calls to DLL.
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# Changed constant names to:
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# const
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# STATUS_SMPEG_ERROR = -1;
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# STATUS_SMPEG_STOPPED = 0;
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# STATUS_SMPEG_PLAYING = 1;
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# because SMPEG_ERROR is a function (_SMPEG_error
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# isn't correct), and cannot be two elements with the
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# same name
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#
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# April 24 2003 - DL : under instruction from Alexey Barkovoy, I have added
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# better TMT Pascal support and under instruction
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# from Prof. Abimbola Olowofoyeku (The African Chief),
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# I have added better Gnu Pascal support
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#
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# April 30 2003 - DL : under instruction from David Mears AKA
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# Jason Siletto, I have added FPC Linux support.
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# This was compiled with fpc 1.1, so remember to set
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# include file path. ie. -Fi/usr/share/fpcsrc/rtl/*
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#
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#
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# $Log: smpeg.pas,v $
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# Revision 1.7 2004/08/14 22:54:30 savage
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# Updated so that Library name defines are correctly defined for MacOS X.
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#
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# Revision 1.6 2004/05/10 14:10:04 savage
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# Initial MacOS X support. Fixed defines for MACOS ( Classic ) and DARWIN ( MacOS X ).
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#
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# Revision 1.5 2004/04/13 09:32:08 savage
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# Changed Shared object names back to just the .so extension to avoid conflicts on various Linux/Unix distros. Therefore developers will need to create Symbolic links to the actual Share Objects if necessary.
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#
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# Revision 1.4 2004/04/02 10:40:55 savage
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# Changed Linux Shared Object name so they reflect the Symbolic Links that are created when installing the RPMs from the SDL site.
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#
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# Revision 1.3 2004/03/31 22:20:02 savage
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# Windows unit not used in this file, so it was removed to keep the code tidy.
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#
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# Revision 1.2 2004/03/30 20:23:28 savage
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# Tidied up use of UNIX compiler directive.
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#
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# Revision 1.1 2004/02/14 23:35:42 savage
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# version 1 of sdl_image, sdl_mixer and smpeg.
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#
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#
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#
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#******************************************************************************
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import
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sdl
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when defined(windows):
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const
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SmpegLibName = "smpeg.dll"
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elif defined(macosx):
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const
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SmpegLibName = "libsmpeg.dylib"
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else:
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const
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SmpegLibName = "libsmpeg.so"
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const
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FILTER_INFO_MB_ERROR* = 1
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FILTER_INFO_PIXEL_ERROR* = 2 # Filter info from SMPEG
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type
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TFilterInfo*{.final.} = object
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yuv_mb_square_error*: PUint16
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yuv_pixel_square_error*: PUint16
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PFilterInfo* = ptr TFilterInfo # MPEG filter definition
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PFilter* = ptr TFilter # Callback functions for the filter
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TFilterCallback* = proc (dest, source: POverlay, region: PRect,
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filter_info: PFilterInfo, data: Pointer): Pointer{.
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cdecl.}
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TFilterDestroy* = proc (Filter: PFilter): Pointer{.cdecl.} # The filter definition itself
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TFilter*{.final.} = object # The null filter (default). It simply copies the source rectangle to the video overlay.
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flags*: Uint32
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data*: Pointer
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callback*: TFilterCallback
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destroy*: TFilterDestroy
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proc filter_null*(): PFilter{.cdecl, importc: "SMPEGfilter_null",
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dynlib: SmpegLibName.}
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# The bilinear filter. A basic low-pass filter that will produce a smoother image.
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proc filter_bilinear*(): PFilter{.cdecl,
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importc: "SMPEGfilter_bilinear", dynlib: SmpegLibName.}
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# The deblocking filter. It filters block borders and non-intra coded blocks to reduce blockiness
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proc filter_deblocking*(): PFilter{.cdecl,
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importc: "SMPEGfilter_deblocking", dynlib: SmpegLibName.}
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#------------------------------------------------------------------------------
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# SMPEG.h
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#------------------------------------------------------------------------------
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const
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MAJOR_VERSION* = 0
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MINOR_VERSION* = 4
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PATCHLEVEL* = 2
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type
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TVersion*{.final.} = object
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major*: byte
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minor*: byte
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patch*: byte
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Pversion* = ptr Tversion # This is the actual SMPEG object
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TSMPEG*{.final.} = object
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PSMPEG* = ptr TSMPEG # Used to get information about the SMPEG object
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TInfo*{.final.} = object
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has_audio*: int32
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has_video*: int32
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width*: int32
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height*: int32
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current_frame*: int32
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current_fps*: float64
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audio_string*: array[0..79, char]
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audio_current_frame*: int32
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current_offset*: UInt32
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total_size*: UInt32
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current_time*: float64
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total_time*: float64
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PInfo* = ptr TInfo # Possible MPEG status codes
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const
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STATUS_ERROR* = - 1
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STATUS_STOPPED* = 0
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STATUS_PLAYING* = 1
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type
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Tstatus* = int32
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Pstatus* = ptr int32 # Matches the declaration of SDL_UpdateRect()
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TDisplayCallback* = proc (dst: PSurface, x, y: int, w, h: int): Pointer{.
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cdecl.} # Create a new SMPEG object from an MPEG file.
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# On return, if 'info' is not NULL, it will be filled with information
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# about the MPEG object.
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# This function returns a new SMPEG object. Use error() to find out
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# whether or not there was a problem building the MPEG stream.
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# The sdl_audio parameter indicates if SMPEG should initialize the SDL audio
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# subsystem. If not, you will have to use the playaudio() function below
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# to extract the decoded data.
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proc SMPEG_new*(theFile: cstring, info: PInfo, audio: int): PSMPEG{.cdecl,
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importc: "SMPEG_new", dynlib: SmpegLibName.}
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# The same as above for a file descriptor
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proc new_descr*(theFile: int, info: PInfo, audio: int): PSMPEG{.
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cdecl, importc: "SMPEG_new_descr", dynlib: SmpegLibName.}
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# The same as above but for a raw chunk of data. SMPEG makes a copy of the
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# data, so the application is free to delete after a successful call to this
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# function.
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proc new_data*(data: Pointer, size: int, info: PInfo, audio: int): PSMPEG{.
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cdecl, importc: "SMPEG_new_data", dynlib: SmpegLibName.}
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# Get current information about an SMPEG object
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proc getinfo*(mpeg: PSMPEG, info: PInfo){.cdecl,
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importc: "SMPEG_getinfo", dynlib: SmpegLibName.}
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#procedure getinfo(mpeg: PSMPEG; info: Pointer);
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#cdecl; external SmpegLibName;
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# Enable or disable audio playback in MPEG stream
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proc enableaudio*(mpeg: PSMPEG, enable: int){.cdecl,
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importc: "SMPEG_enableaudio", dynlib: SmpegLibName.}
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# Enable or disable video playback in MPEG stream
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proc enablevideo*(mpeg: PSMPEG, enable: int){.cdecl,
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importc: "SMPEG_enablevideo", dynlib: SmpegLibName.}
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# Delete an SMPEG object
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proc delete*(mpeg: PSMPEG){.cdecl, importc: "SMPEG_delete",
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dynlib: SmpegLibName.}
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# Get the current status of an SMPEG object
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proc status*(mpeg: PSMPEG): Tstatus{.cdecl, importc: "SMPEG_status",
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dynlib: SmpegLibName.}
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# status
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# Set the audio volume of an MPEG stream, in the range 0-100
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proc setvolume*(mpeg: PSMPEG, volume: int){.cdecl,
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importc: "SMPEG_setvolume", dynlib: SmpegLibName.}
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# Set the destination surface for MPEG video playback
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# 'surfLock' is a mutex used to synchronize access to 'dst', and can be NULL.
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# 'callback' is a function called when an area of 'dst' needs to be updated.
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# If 'callback' is NULL, the default function (SDL_UpdateRect) will be used.
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proc setdisplay*(mpeg: PSMPEG, dst: PSurface, surfLock: Pmutex,
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callback: TDisplayCallback){.cdecl,
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importc: "SMPEG_setdisplay", dynlib: SmpegLibName.}
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# Set or clear looping play on an SMPEG object
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proc loop*(mpeg: PSMPEG, repeat: int){.cdecl, importc: "SMPEG_loop",
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dynlib: SmpegLibName.}
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# Scale pixel display on an SMPEG object
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proc scaleXY*(mpeg: PSMPEG, width, height: int){.cdecl,
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importc: "SMPEG_scaleXY", dynlib: SmpegLibName.}
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proc scale*(mpeg: PSMPEG, scale: int){.cdecl, importc: "SMPEG_scale",
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dynlib: SmpegLibName.}
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proc Double*(mpeg: PSMPEG, doubleit: bool)
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# Move the video display area within the destination surface
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proc move*(mpeg: PSMPEG, x, y: int){.cdecl, importc: "SMPEG_move",
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dynlib: SmpegLibName.}
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# Set the region of the video to be shown
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proc setdisplayregion*(mpeg: PSMPEG, x, y, w, h: int){.cdecl,
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importc: "SMPEG_setdisplayregion", dynlib: SmpegLibName.}
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# Play an SMPEG object
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proc play*(mpeg: PSMPEG){.cdecl, importc: "SMPEG_play",
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dynlib: SmpegLibName.}
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# Pause/Resume playback of an SMPEG object
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proc pause*(mpeg: PSMPEG){.cdecl, importc: "SMPEG_pause",
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dynlib: SmpegLibName.}
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# Stop playback of an SMPEG object
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proc stop*(mpeg: PSMPEG){.cdecl, importc: "SMPEG_stop",
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dynlib: SmpegLibName.}
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# Rewind the play position of an SMPEG object to the beginning of the MPEG
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proc rewind*(mpeg: PSMPEG){.cdecl, importc: "SMPEG_rewind",
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dynlib: SmpegLibName.}
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# Seek 'bytes' bytes in the MPEG stream
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proc seek*(mpeg: PSMPEG, bytes: int){.cdecl, importc: "SMPEG_seek",
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dynlib: SmpegLibName.}
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# Skip 'seconds' seconds in the MPEG stream
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proc skip*(mpeg: PSMPEG, seconds: float32){.cdecl, importc: "SMPEG_skip",
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dynlib: SmpegLibName.}
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# Render a particular frame in the MPEG video
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# API CHANGE: This function no longer takes a target surface and position.
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# Use setdisplay() and move() to set this information.
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proc renderFrame*(mpeg: PSMPEG, framenum: int){.cdecl,
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importc: "SMPEG_renderFrame", dynlib: SmpegLibName.}
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# Render the last frame of an MPEG video
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proc renderFinal*(mpeg: PSMPEG, dst: PSurface, x, y: int){.cdecl,
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importc: "SMPEG_renderFinal", dynlib: SmpegLibName.}
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# Set video filter
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proc filter*(mpeg: PSMPEG, filter: PFilter): PFilter{.cdecl,
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importc: "SMPEG_filter", dynlib: SmpegLibName.}
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# Return NULL if there is no error in the MPEG stream, or an error message
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# if there was a fatal error in the MPEG stream for the SMPEG object.
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proc error*(mpeg: PSMPEG): cstring{.cdecl, importc: "SMPEG_error",
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dynlib: SmpegLibName.}
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# Exported callback function for audio playback.
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# The function takes a buffer and the amount of data to fill, and returns
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# the amount of data in bytes that was actually written. This will be the
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# amount requested unless the MPEG audio has finished.
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#
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proc playAudio*(mpeg: PSMPEG, stream: pointer, length: int): int{.cdecl,
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importc: "SMPEG_playAudio", dynlib: SmpegLibName.}
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# Wrapper for playAudio() that can be passed to SDL and SDL_mixer
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proc playAudioSDL*(mpeg: Pointer, stream: pointer, length: int){.cdecl,
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importc: "SMPEG_playAudioSDL", dynlib: SmpegLibName.}
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# Get the best SDL audio spec for the audio stream
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proc wantedSpec*(mpeg: PSMPEG, wanted: PAudioSpec): int{.cdecl,
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importc: "SMPEG_wantedSpec", dynlib: SmpegLibName.}
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# Inform SMPEG of the actual SDL audio spec used for sound playback
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proc actualSpec*(mpeg: PSMPEG, spec: PAudioSpec){.cdecl,
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importc: "SMPEG_actualSpec", dynlib: SmpegLibName.}
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# This macro can be used to fill a version structure with the compile-time
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# version of the SDL library.
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proc GETVERSION*(X: var Tversion)
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# implementation
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proc double(mpeg: PSMPEG, doubleit: bool) =
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if doubleit: scale(mpeg, 2)
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else: scale(mpeg, 1)
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proc GETVERSION(X: var Tversion) =
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X.major = MAJOR_VERSION
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X.minor = MINOR_VERSION
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X.patch = PATCHLEVEL
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