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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1624 | giacomo | 1 | This is the S.Ha.R.K. porting of the MPEG2 decoder from the |
| 2 | MPEG Software Simulation Group. |
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| 3 | |||
| 4 | --------------------------------------------------------------------------- |
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| 5 | |||
| 6 | The original source code is available on the web at |
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| 7 | http://www.mpeg.org |
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| 8 | |||
| 9 | The demo uses the FAT16 filesystem and the graphics card. |
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| 10 | I just added these files: |
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| 11 | - gvideo.c Video initialization and output |
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| 12 | - jetctrl.c Idle time visualization |
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| 13 | - makefile S.Ha.R.K. Makefile for the demo |
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| 14 | - store.c interface between the original decoder and S.Ha.R.K. |
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| 15 | |||
| 16 | The original makefile and store.c files has also been renamed to store.ori. |
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| 17 | |||
| 18 | --------------------------------------------------------------------------- |
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| 19 | |||
| 20 | The demo simply intercets the Write_Frame function and puts the decoded |
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| 21 | frame into a buffer. The task created in gvideo is a periodic CBS task |
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| 22 | that reads a picture from the buffer and simply displays it. |
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| 23 | |||
| 24 | =========================================================================== |
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| 25 | |||
| 26 | This is the original readme file: |
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| 27 | |||
| 28 | |||
| 29 | January 9, 1995: |
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| 30 | ===== |
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| 31 | Pre-release caveats: |
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| 32 | |||
| 33 | - has only been tested with gcc. (I'm not sure we will even bother |
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| 34 | with acc, or cc in the future). |
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| 35 | |||
| 36 | - I'm fully aware of the warnings received by -Wall |
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| 37 | |||
| 38 | - Verifier still not integrated (due to complexity), although |
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| 39 | experimental vbv_delay code included in verify.c |
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| 40 | |||
| 41 | |||
| 42 | |||
| 43 | December 20, 1995 |
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| 44 | =============================================================== |
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| 45 | Frame buffer substitution edition of decoder. |
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| 46 | |||
| 47 | Restrictions: |
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| 48 | - temporal_reference in bitstream must be correct. |
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| 49 | |||
| 50 | - substitute pictures must have pixel (luminance samples) width |
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| 51 | and height equal to coded_picture_width (mb_width*16) and |
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| 52 | coded_picture_height (mb_height*16) rather than horizontal_size |
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| 53 | and vertical_size, respectively. |
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| 54 | |||
| 55 | - all input pictures must be interleaved into a frame. |
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| 56 | |||
| 57 | - frame count (index) is based on absolute display frame order with |
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| 58 | no repeated (3:2 pulldown) fields or frames. |
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| 59 | |||
| 60 | -------------------------------------------------------- |
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| 61 | Notes: |
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| 62 | |||
| 63 | - command line arguements in this edition differ from verifier |
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| 64 | style. This decoder's arguments are the same as the |
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| 65 | public distribution's (July 4, 1994) code . |
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| 66 | |||
| 67 | please note that this code, with frame buffer substitution, when it |
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| 68 | is released will use the verifier style of arguments. |
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| 69 | |||
| 70 | - Carsten's updated spatial scalability decoder routines have been |
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| 71 | incorperated. |
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| 72 |