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Diffstat (limited to 'DOCS/OUTDATED-tech/realcodecs/video-codecs.txt')
| -rw-r--r-- | DOCS/OUTDATED-tech/realcodecs/video-codecs.txt | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/DOCS/OUTDATED-tech/realcodecs/video-codecs.txt b/DOCS/OUTDATED-tech/realcodecs/video-codecs.txt deleted file mode 100644 index af2152061a..0000000000 --- a/DOCS/OUTDATED-tech/realcodecs/video-codecs.txt +++ /dev/null @@ -1,185 +0,0 @@ -The work has been based on the RV30 codec, but since RV20 has the same -interface, it might work for it as well. - - - - -error codes (the software uses redmond originated error codes) - -1. internal code (1-10) -2. result - -0 00000000 success -1 80004005 E_FAIL -2 8007000E E_OUTOFMEMORY -3,9 80004001 E_NOTIMPL -4,5 80070005 E_ACCESSDENIED -6 80004003 E_POINTER -7,10 80070057 E_INVALIDREG -8 80040FC1 (or 1FC?: CO_E_OBJISREG) - never occurred here - - - - - -I think the only relevant file is the decoder drv[23].so.6.0 -The rv[23]0 ones are just for streaming. We do this ourselves. - - -The codec consists of several functions. The relevant ones are: - -RV20toYUV420Init() -RV20toYUV420Transform() -RV20toYUV420CustomMessage() -RV20toYUV420Free() - - -The others are irrelevant (seems to me). HiveMessage doesn't manipulate -anything and is only called in the beginning. - -result=RV20toYUV420Init(struct init_data *, struct rvyuvMain **); - -struct init_data { - short constant=0xb; - short width, height; - short 0, 0, 0; - ulong format1; - long 1; - ulong format2; -}; - -format1 and format2 are stored in the .rm file's stream headers. -(format1>>16)&3 seems to be a sub-codec id/selector, at least for rv30 -it's the only difference between low and high bitrate files. - -result=RV20toYUV420Transform(char *input_stream, char *output_data, - struct transin *, struct transout *, struct rvyuvMain *); - -struct transin { - ulong length_of_input_data; - ulong null; - ulong num_sub_packets_in_block_minus_one; - ulong *sub_packets_list; - ulong another_null; - ulong timestamp_from_stream; -}; - -struct transout { - ulong flag1; // ((var_94&2!=0)&&(result==0))?1:0 - ulong flag2; // 4 LBS from var_94 - ulong zero; - ulong width, height; -}; - -The length of output_stream is 1.5*width*height (I420 planar yuv 4:2:0). -input_stream is the exact data from the data block for one frame. - -sub_packets_list is a list of num_sub_packets pairs of long values, in form: -1, 0, -1, offset_2nd, -1, offset_3rd, -1, offset_4th, -... - -where offset_* are the offsets or sub-packets relative to input_stream. - - -result=RV20toYUV420CustomMessage(ulong *msg, struct rvyuvMain *); - -Messages used by RV30: - -A message is a triplet (cmd,val,ext) of ulong. - -NOTE: -rv30 only requires the (0x24,2|3,{w,h,w,h}) message. others can be left out! -rv20 only requires the (0x11,2,0) message in rp8, before each transform call. - -(3,2,0) -returns always(?) an error, since a global variable inside the codec -(which points to a function similar to custommessage), is always NULL - -(0x11,0|1|2,0) -val=0|1: sets intern2 to val, when intern1 is non-zero - return 3 when intern1 is zero and val is 1 - else returns 0 -val=2: return intern2 -what does intern[1,2] mean? - -(0x12,...) -used by rv20, function unknown, can be ignored - -(0x1e,2|3,1) -calls a subroutine and returns the result, purpose has to be detemined - -(0x24,subcodec,{...}) -copies 4 dwords to rvyuvMain+07c: { width, height, 0, 0 } -subcodec must be 2 (low-bitrate) or 3 (high-bitrate) for rv30. -the codec type (low vs high) can be determined from 1+((format1>>16)&3) -for rv20, this call should be ignored! (makes codec crashing) - -(0x1c,a,b) - called inside transform -to be analyzed - -(105,...) -used by rv20, function unknown, can be ignored - - -structure of rvyuvMain: ------------------------ - -DWORDS (the entries are not always constant) -there are two w/h pairs at 05C. the first is the size of the -unscaled video stream, the second possibly image size - -000 1 6 3 1 -010 1 0 AEBFC0D1(magic) 0 -020 0 ptr->? 0 0 -030 0 0 ->rvyuvMain+0x050 ? -040 width height 0x17 0x479 -050 ->rvyuvMain 0x17 0x17 width -060 height width height 0 -070 0 1 0 0 -080 0 0xb w h -090 w h 0 0 -0A0 1 0xb0(w?) 0x58 0x58 -0B0 ptr->? 0 0 1 -0C0 0x32 1 0 0 -0D0 0 0 0 0 -0E0 0 0 0 0 -0F0 0 0 0 0 -100 0 0 0 0 -110 p p p p p are pointers to several function, for -120 p p p p example to the actual public functions -130 p p p p (except init, the others are some kind of -140 p p p p interfaces) -150 p 0 0 0 -160 0 0x2000 1 0 -170 0 0 0 0 -180 1 1 0 0 -190 0 0 0 0 -1A0 0 0 0 0 -1B0 1 0 ptr->? ptr->? -1C0 1 0 0 0 -1D0 0 0 0 0 -1E0 0 0 0 0 -... - - - - -Order of calls: ---------------- - -Init -(0x11,0,0) -(0x24,2,{...}) - -[ -(3,2,0)->80004001 -(0x11,1,0) -(0x1e,3,1) -Transform (internally calls (0x1c,x,y)) -(11,2,0) -] - -Free |