mirror of https://github.com/mpv-player/mpv
remove index flag
max_short_distance reserved_v -> reserved_count header repeation rules some of this is from rich git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@12502 b3059339-0415-0410-9bf9-f77b7e298cf2
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@ -89,6 +89,7 @@ main header:
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version v
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stream_count v
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max_distance v
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max_short_distance v
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global_time_base_nom v
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global_time_base_denom v
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short_startcode v
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@ -113,7 +114,7 @@ main header:
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data_size_mul[i]= tmp_mul;
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data_size_lsb[i]= tmp_size + j;
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timestamp_delta[i]= tmp_timestamp;
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reserved_v[i]= tmp_res;
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reserved_count[i]= tmp_res;
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}
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}
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reserved_bytes
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@ -132,7 +133,6 @@ stream_header:
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msb_timestamp_shift v
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decode_delay v
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fixed_fps u(1)
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index_flag u(1)
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reserved u(6)
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for(;;){
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codec_specific_data_type v
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@ -170,14 +170,13 @@ frame
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if(flags[frame_code]&1){
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data_size_msb v
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}
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for(i=0; i<reserved_v[frame_code]; i++)
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for(i=0; i<reserved_count[frame_code]; i++)
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reserved v
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data
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Index:
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index_startcode f(64)
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packet header
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stream_id v
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index_length v
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for(i=0; i<index_length; i++){
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index_timestamp v
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@ -267,13 +266,25 @@ max_distance
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there is only a single frame between the 2 frame_startcodes
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this can be used by the demuxer to detect damaged frame headers if the
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damage results in a too long chain
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SHOULD be set to <=16384 to ensure reasonable error recovery
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SHOULD be set to <=32768 or at least <=65536 unless there is a very good
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reason to set it higher otherwise reasonable error recovery will be
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impossible
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max_short_distance
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max distance of short startcodes or frame_startcodes, the distance may
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only be larger if there is only a single frame between the 2
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frame_startcodes/short startcodes this can be used by the demuxer to
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detect damaged frame headers if the damage results in a too long chain
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SHOULD be set to <=4096 or at least <=8192 unless there is a very good
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reason to set it higher otherwise reasonable error recovery will be
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impossible
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short_startcode
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MUST be 3 bytes long and MUST have 'N' as first byte, the second byte
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MUST not be a printable uppercase letter / must not be within 65..90,
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default is 0x4EFE79
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stream_id
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Note: streams with a lower relative class MUST have a lower relative id
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so a stream with class 0 MUST allways have a id which is lower then any
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@ -539,11 +550,18 @@ stream_header (id=n)
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headers may be repated, but if they are then they MUST all be repeated together
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and repeated headers MUST be identical
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headers MAY only repeated at the closest possible positions after 2^x where x is
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an integer and the file end, so the headers may be repeated at 4102 if thats the
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closest possition after 2^12=4096 at which the headers can be placed
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headers MUST be repeated every 10sec at least ? FIXME
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headers MUST be repeated BEFORE keyframes
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headers MUST be placed at least at the begin of the file and immedeatly before
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the index or at the file end if there is no index
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headers MUST be repeated at least twice (so they exist 3 times in a file)
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a demuxer MUST not demux a stream which contains more than one stream, or which
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is wrapped in a structure to facilitate more than one stream or otherwise
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duplicate the role of a container. any such file is to be considered invalid
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Index
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the index can be repeated but there SHOULD be at least one for each stream at
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the end
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@ -561,6 +579,13 @@ for example, the current song title & artist of the currently shown music video
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Unknown packets
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MUST be ignored by the demuxer
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demuxer (non-normative)
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in the absence of valid header at beginning, players SHOULD search for backup
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headers starting at offset 2^x for each x players SHOULD end their search from a
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particular offset when any startcode is found (including syncpoint)
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Sample code (GPL, & untested)
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typedef BufferContext{
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