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| author | michael <michael@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2004-04-13 00:49:47 +0000 |
|---|---|---|
| committer | michael <michael@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2004-04-13 00:49:47 +0000 |
| commit | 617218a4e590581bff82a1bfe78e07c2f321123a (patch) | |
| tree | 5ed1436e3a75f4552f735cc0a43d620e700f4704 /DOCS/tech/mpcf.txt | |
| parent | b9477b2d7aef24712a700cdc429b336884ea3331 (diff) | |
| download | mpv-617218a4e590581bff82a1bfe78e07c2f321123a.tar.bz2 mpv-617218a4e590581bff82a1bfe78e07c2f321123a.tar.xz | |
(de)coder -> (de)muxer
some clarifications
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@12185 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'DOCS/tech/mpcf.txt')
| -rw-r--r-- | DOCS/tech/mpcf.txt | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/DOCS/tech/mpcf.txt b/DOCS/tech/mpcf.txt index ec74cde356..35c88fa41b 100644 --- a/DOCS/tech/mpcf.txt +++ b/DOCS/tech/mpcf.txt @@ -78,8 +78,8 @@ align_byte reserved_bytes for(i=0; i<forward_ptr - length_of_non_reserved; i++) reserved u(8) - a decoder MUST ignore any reserved bytes - a encoder MUST NOT write any reserved bytes, as this would make it + a demuxer MUST ignore any reserved bytes + a muxer MUST NOT write any reserved bytes, as this would make it inpossible to add new fields at the end of packets in the future in a compatible way @@ -254,7 +254,7 @@ stream_class 32 audio 64 subtiles Note the remaining values are reserved and MUST NOT be used - a decoder MUST ignore streams with reserved classes + a demuxer MUST ignore streams with reserved classes fourcc identification for the codec @@ -330,8 +330,9 @@ flags[frame_code] delta= last_timestamp - mask/2 timestamp= ((timestamp_lsb-delta)&mask) + delta TTT must be 100 or 101 if the packet_type is not 0 - the last timestamp differences are reset to the default values - from the stream header if a packet of type not 0 in encountered + the last timestamp differences are reset to the + initial_timestamp_predictor values from the stream header if a + packet of type not 0 in encountered if D is 1 then data_size_msb is coded, otherwise its 0 KK is the keyframe_type 00-> no keyframe, @@ -368,12 +369,14 @@ data_size if(data_size_lsb == data_size_mul) data_size= last; else if(data_size_lsb == data_size_mul+1) - data_size= next last; + data_size= next_last; else if(data_size_lsb < data_size_mul) data_size= data_size_lsb + data_size_msb*data_size_mul; else reserved - last and next last are reset to the values stored in the stream header - if an frame with type > 0 is encountered + next_last is the second last unique data_size, for example: + previous data_size: 123,500,312,500,500 last=500, next_last=312 + last and next_last are reset to the initial_data_size_predictor values + stored in the stream header if an frame with type > 0 is encountered lsb_timestamp least significant bits of the timestamp in time_base precission @@ -519,7 +522,7 @@ for realtime streaming info packets will normally be transmitted when they apply for example, the current song title & artist of the currently shown music video Unknown packets -MUST be ignored by the decoder +MUST be ignored by the demuxer Sample code (GPL, & untested) |