diff --git a/LICENSE b/LICENSE new file mode 100644 --- /dev/null +++ b/LICENSE @@ -0,0 +1,347 @@ +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + + + + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 675 Mass Ave, Cambridge, MA 02139, USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. 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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING +OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED +TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY +YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER +PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE +POSSIBILITY OF SUCH DAMAGES. + + END OF TERMS AND CONDITIONS + + Appendix: How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) 19yy + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) 19yy name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. + diff --git a/Setup.hs b/Setup.hs new file mode 100644 --- /dev/null +++ b/Setup.hs @@ -0,0 +1,2 @@ +import Distribution.Simple +main=defaultMain diff --git a/Theora.cabal b/Theora.cabal new file mode 100644 --- /dev/null +++ b/Theora.cabal @@ -0,0 +1,13 @@ +Name: Theora +Version: 1.0 +Description: Video Compression Library (see http://theora.org) +License: GPL +License-file: LICENSE +Author: Pierre-Etienne Meunier +Maintainer: pierreetienne.meunier@gmail.com +Build-Type: Simple +Cabal-Version: >=1.2 +Library + Build-Depends: base + Exposed-modules: Theora.Encoding + extra-libraries: ogg theora diff --git a/Theora/Encoding.hsc b/Theora/Encoding.hsc new file mode 100644 --- /dev/null +++ b/Theora/Encoding.hsc @@ -0,0 +1,403 @@ +{-#LANGUAGE ForeignFunctionInterface #-} +{-#OPTIONS -fglasgow-exts -logg -ltheora #-} + +-- | This module calls the libtheora C library to generate video ogg files from YCbCr images. +-- As explained on , the basic steps +-- for creating a video are the following : +-- +-- * create in an 'Info' record +-- +-- * call 'encodeAlloc' on it +-- +-- * call 'flushHeader' until it returns 'Nothing' +-- +-- * For each uncompressed frame, submit it with 'encodeIn', then retrieve potential packets +-- with 'encodeOut' + +module Theora.Encoding (-- * Theora structures and function + Info(..),Comment (..), + PixelFmt(Pf420,Pf422,Pf444),ColorSpace(..), + encodeAlloc, + flushHeader, + ImgPlane, + YCbCrBuffer(..),newYCbCr, + encodeIn, encodeOut, + -- * Ogg-related functions + OggPacket,newOggStreamState, + OggPage,streamPacketIn, streamPageOut, streamFlush) where + + + +import Foreign.Storable +import Foreign +import Foreign.ForeignPtr +import Foreign.C.Types +import Foreign.C.String +import Data.Int + +#include +#include + +{-| Theora supports 4 different pixel formats, listed in + . YCbCr chroma frames (Cb and Cr) may be resized for + compression (see ). The resulting pixel formats + are as follows : + +-} + +data PixelFmt= + Pf420 -- ^Chroma decimation by 2 in both directions + | PfRsvd + | Pf422 -- ^Chroma decimation by 2 in the /x/ direction + | Pf444 -- ^No chroma decimation + +instance Enum PixelFmt where + fromEnum Pf420= #const TH_PF_420 + fromEnum PfRsvd= #const TH_PF_RSVD + fromEnum Pf422= #const TH_PF_422 + fromEnum Pf444= #const TH_PF_444 + + toEnum (#const TH_PF_420)=Pf420 + toEnum (#const TH_PF_RSVD)=PfRsvd + toEnum (#const TH_PF_422)=Pf422 + toEnum (#const TH_PF_444)=Pf444 + +data ColorSpace= + Unspecified + |ItuRec470M -- ^A color space designed for NTSC content + |ItuRec470BG -- ^A color space designed for PAL/SECAM content +instance Enum ColorSpace where + fromEnum Unspecified = #const TH_CS_UNSPECIFIED + fromEnum ItuRec470M = #const TH_CS_ITU_REC_470M + fromEnum ItuRec470BG = #const TH_CS_ITU_REC_470BG + + toEnum (#const TH_CS_UNSPECIFIED)=Unspecified + toEnum (#const TH_CS_ITU_REC_470M)=ItuRec470M + toEnum (#const TH_CS_ITU_REC_470BG)=ItuRec470BG + +data Info=Info {frameWidth::Int32, + frameHeight::Int32, + picWidth::Int32, + picHeight::Int32, + picX::Int32, + picY::Int32, + colorSpace::ColorSpace, + pixelFmt::PixelFmt, + targetBitRate::CInt, + quality::CInt, + keyframeGranuleShift::CInt} +efault= #const TH_EFAULT +instance Storable Info where + sizeOf _ = #size th_info + alignment _=1 + peek ptr = do + fw<-(#peek th_info, frame_width) ptr + fh<-(#peek th_info, frame_height) ptr + pw<-(#peek th_info, pic_width) ptr + ph<-(#peek th_info, pic_width) ptr + px<-(#peek th_info, pic_x) ptr + py<-(#peek th_info, pic_y) ptr + cspace<-(#peek th_info, colorspace) ptr + pfmt<-(#peek th_info, pixel_fmt) ptr + brate<-(#peek th_info, target_bitrate) ptr + qual<-(#peek th_info, quality) ptr + kframe<-(#peek th_info, keyframe_granule_shift) ptr + return Info {frameWidth=fw, + frameHeight=fh, + picWidth=pw, + picHeight=ph, + picX=px, + picY=py, + colorSpace=toEnum cspace, + pixelFmt=toEnum pfmt, + targetBitRate=brate, + quality=qual, + keyframeGranuleShift=kframe} + + poke ptr (Info fw fh pw ph px py cspace pfmt brate qual kframe)=do + (#poke th_info, frame_width) ptr fw + (#poke th_info, frame_height) ptr fh + (#poke th_info, pic_width) ptr pw + (#poke th_info, pic_height) ptr ph + (#poke th_info, pic_x) ptr px + (#poke th_info, pic_y) ptr py + (#poke th_info, colorspace) ptr $ fromEnum cspace + (#poke th_info, pixel_fmt) ptr $ fromEnum pfmt + (#poke th_info, target_bitrate) ptr brate + (#poke th_info, quality) ptr qual + (#poke th_info, keyframe_granule_shift) ptr kframe + +data OggPacket=Packet {packet::Ptr CChar, + bytes::CLong, + bos::CLong, + eos::CLong, + granulePos::Int64, + packetNo::Int64} + +instance Storable OggPacket where + sizeOf _= #size ogg_packet + alignment _=1 + peek ptr=do + packet<-(#peek ogg_packet, packet) ptr + bytes<-(#peek ogg_packet, bytes) ptr + bos<-(#peek ogg_packet, b_o_s) ptr + eos<-(#peek ogg_packet, e_o_s) ptr + granulePos<-(#peek ogg_packet, granulepos) ptr + packetNo<-(#peek ogg_packet, packetno) ptr + return $ Packet {packet=packet, + bytes=bytes, + bos=bos, + eos=eos, + granulePos=granulePos, + packetNo=packetNo} + poke ptr (Packet pack bytes bos eos gpos pno)=do + (#poke ogg_packet, packet) ptr pack + (#poke ogg_packet, bytes) ptr bytes + (#poke ogg_packet, b_o_s) ptr bos + (#poke ogg_packet, e_o_s) ptr eos + (#poke ogg_packet, granulepos) ptr gpos + (#poke ogg_packet, packetno) ptr pno +{- +instance Show OggPacket where + show (Packet p b bos eos gran no)= + unsafePerformIO (peekCStringLen (p,fromIntegral b)) +-} + +data ThEncCtx +type EncCtx=ForeignPtr ThEncCtx +foreign import ccall "theora/theora.h th_encode_alloc" th_encode_alloc::(Ptr Info)->IO (Ptr ThEncCtx) +foreign import ccall "theora/theora.h th_info_init" th_info_init::(Ptr Info)->IO () +foreign import ccall "theora/theora.h &th_encode_free" th_encode_free::FunPtr ((Ptr ThEncCtx)->IO()) + +-- | Makes an encoder ('EncCtx') instance out of an 'Info' record +encodeAlloc::Info->IO (Maybe EncCtx) +encodeAlloc inf=do + ptr<-alloca (\i->do + th_info_init i + poke i inf + th_encode_alloc i) + if ptr==nullPtr then return Nothing else + newForeignPtr th_encode_free ptr >>= (return.Just) + + +data Comment=Comment { + user::[String], -- ^Your comments + vendor::String -- ^Name of the encoder, i.e. your application + } +instance Storable Comment where + sizeOf _ = #size th_comment + alignment _=1 + peek ptr=do + length<- (#peek th_comment, comments) ptr + c_userComments<-peekArray length =<< (#peek th_comment, comments) ptr + userComments<-mapM (peekCString) c_userComments + vendor<-(#peek th_comment, vendor) ptr >>= peekCString + return $Comment {user=userComments, + vendor=vendor} + poke ptr comment= do + -- user_comments + userComments<-mallocArray (length $ user comment) + cstrings<-mapM (\str->newCString str) $user comment + pokeArray userComments cstrings + (#poke th_comment, user_comments) ptr userComments + -- comments_length + commentLengths<-mallocArray (length $ user comment) + pokeArray commentLengths (map length $ user comment) + (#poke th_comment, comment_lengths) ptr commentLengths + -- length + (#poke th_comment, comments) ptr (length $ user comment) + -- vendor + (#poke th_comment, vendor) ptr =<< (newCString $ vendor comment) + +data HeaderPacket=HeaderPacket +foreign import ccall "theora/theora.h th_comment_init" th_comment_init::Ptr Comment->IO() +foreign import ccall "theora/theora.h th_encode_flushheader" th_encode_flushheader:: + (Ptr ThEncCtx)->(Ptr Comment)->(Ptr OggPacket)->IO CInt + +-- | Returns the last header packets. This function should be called before +-- encoding actual video. +flushHeader::EncCtx->Comment->IO [OggPacket] +flushHeader enc comment= + withForeignPtr enc (\encctx-> + alloca (\ogg-> + alloca (\pComment-> + do + th_comment_init pComment + poke pComment comment + ret<-th_encode_flushheader encctx pComment ogg + if ret==0 || ret==efault then return [] else + do + tl<-flushHeader enc comment + peek ogg >>= return.(:tl)))) + + +data ImgPlane=ImgPlane {width::CInt, + height::CInt, + stride::CInt, + img::ForeignPtr CUChar} + +instance Storable ImgPlane where + sizeOf _= #size th_img_plane + alignment _=1 + peek ptr=do + width<-(#peek th_img_plane, width) ptr + height<-(#peek th_img_plane, height) ptr + stride<-(#peek th_img_plane, stride) ptr + img<-((#peek th_img_plane, data) ptr) >>= newForeignPtr finalizerFree + return $ ImgPlane {width=width, + height=height, + stride=stride, + img=img} + poke ptr (ImgPlane w h s i)=do + (#poke th_img_plane, width) ptr w + (#poke th_img_plane, height) ptr h + (#poke th_img_plane, stride) ptr s + withForeignPtr i (\img->(#poke th_img_plane, data) ptr img) + +foreign import ccall "theora/theora.h th_encode_ycbcr_in" th_encode_ycbcr_in:: + (Ptr ThEncCtx)->(Ptr YCbCrBuffer)->IO CInt + +-- | 'YCbCrBuffer' is the type of raw YCbCr frames +data YCbCrBuffer=YCbCr { + y ::ImgPlane, -- ^ the Y plane + cb::ImgPlane, -- ^ the Cb plane + cr::ImgPlane -- ^ the Cr plane + } + +instance Storable YCbCrBuffer where + sizeOf _= #size th_ycbcr_buffer + alignment _= sizeOf (undefined :: Ptr ImgPlane) + peek imgPtr=do + let ptr=castPtr imgPtr + y<-peek ptr + cb<-peek (ptr`plusPtr`(sizeOf (undefined :: ImgPlane))) + cr<-peek (ptr`plusPtr`(2*(sizeOf (undefined :: ImgPlane)))) + return $ YCbCr {y=y, + cb=cb, + cr=cr} + poke imgPtr (YCbCr y cb cr)=do + let ptr=castPtr imgPtr + poke ptr y + poke (ptr`plusPtr`(sizeOf (undefined::ImgPlane))) cb + poke (ptr`plusPtr`(2*(sizeOf (undefined::ImgPlane)))) cr + + +-- |Allocate a new YCbCrBuffer object +newYCbCr::Int->Int->PixelFmt->IO YCbCrBuffer +newYCbCr wH hH Pf420=do + yImg<-newForeignPtr finalizerFree =<< (mallocBytes $ wH*hH) + cbImg<-newForeignPtr finalizerFree =<< (mallocBytes $ (wH*hH)`quot`4) + crImg<-newForeignPtr finalizerFree =<< (mallocBytes $ (wH*hH)`quot`4) + let w=(fromIntegral wH)`quot`2 + h=(fromIntegral hH)`quot`2 + y=ImgPlane {width=fromIntegral wH, + height=fromIntegral hH, + stride=w, + img=yImg} + cb=ImgPlane{width=w, + height=h, + stride=w, + img=cbImg} + cr=ImgPlane{width=w, + height=h, + stride=w, + img=crImg} + return $ YCbCr {y=y,cb=cb,cr=cr} + +-- |Submits a frame for encoding +encodeIn::EncCtx->YCbCrBuffer->IO() +encodeIn enc buf= + withForeignPtr enc (\enc->alloca (\pbuf->do + poke pbuf buf + ret<-th_encode_ycbcr_in enc pbuf + return ())) + +foreign import ccall "theora/theora.h th_encode_packetout" th_encode_packetout:: + Ptr ThEncCtx->CInt->Ptr OggPacket->IO CInt + +-- |Retrieve all the ready encoded packets +encodeOut::EncCtx->Bool->IO [OggPacket] +encodeOut e last= + withForeignPtr e (\enc-> + alloca (\packet->do + res<-th_encode_packetout enc (if last then 1 else 0) packet + if res==0 || res==efault then return [] else do + tl<-encodeOut e last + peek packet >>= (return.(:tl)))) + + +data OggPage=OggPage{header::Ptr CChar, + headerLen::CLong, + body::Ptr CChar, + bodyLen::CLong} + +instance Storable OggPage where + sizeOf _= #size ogg_page + alignment _=1 + peek ptr=do + header<-(#peek ogg_page, header) ptr + headerLen<-(#peek ogg_page, header_len) ptr + body<-(#peek ogg_page, body) ptr + bodyLen<-(#peek ogg_page, body_len) ptr + return $ OggPage{header=header, headerLen=headerLen, body=body, bodyLen=bodyLen} + poke ptr x=do + (#poke ogg_page, header) ptr (header x) + (#poke ogg_page, header_len) ptr (headerLen x) + (#poke ogg_page, body) ptr $ body x + (#poke ogg_page, body_len) ptr $ bodyLen x + + +instance Show OggPage where + show (OggPage hdr hdrl body bodyl)= + unsafePerformIO (do + head<-peekCStringLen (hdr,fromIntegral hdrl) + body<-peekCStringLen (body,fromIntegral bodyl) + return $ head++body) +data COggStreamState +type OggStreamState=ForeignPtr COggStreamState +instance Storable COggStreamState where + sizeOf _= #size ogg_stream_state + alignment _=1 + +foreign import ccall "theora/theora.h ogg_stream_init" ogg_stream_init:: + (Ptr COggStreamState)->CInt->IO CInt +foreign import ccall "theora/theora.h ogg_stream_packetin" ogg_stream_packetin:: + (Ptr COggStreamState)->(Ptr OggPacket)->IO CInt +foreign import ccall "theora/theora.h ogg_stream_pageout" ogg_stream_pageout:: + (Ptr COggStreamState)->(Ptr OggPage)->IO CInt +foreign import ccall "theora/theora.h ogg_stream_flush" ogg_stream_flush:: + (Ptr COggStreamState)->(Ptr OggPage)->IO CInt + +-- |Initializes an Ogg container stream +newOggStreamState::Int->IO OggStreamState +newOggStreamState initial=do + state<-malloc + success<-ogg_stream_init state $ fromIntegral initial + newForeignPtr finalizerFree state + +-- |Submits an encoded packet into the streams +streamPacketIn::OggStreamState->OggPacket->IO () +streamPacketIn state packet= + withForeignPtr state (\s-> + alloca(\pack->do + poke pack packet + ogg_stream_packetin s pack + return ())) +-- |Get an outputable Ogg page +streamPageOut::OggStreamState->IO (Maybe OggPage) +streamPageOut state= + withForeignPtr state (\s-> + alloca(\page->do + result<-ogg_stream_pageout s page + if result==0 then return Nothing else + peek page >>= return.Just)) + +-- | Retrieve the last pages of the stream +streamFlush::OggStreamState->IO (Maybe OggPage) +streamFlush state= + withForeignPtr state (\s-> + alloca (\page->do + res<-ogg_stream_flush s page + if res==0 then return Nothing else + peek page >>= (return.Just) )) +