February 2008 - NUT-devel - lists.mplayerhq.hu

[nut] [propchange]: r581 - svn:log
by diego 05 Feb '08

05 Feb '08

Author: diego Revision: 581 Property Name: svn:log Action: modified Property diff: --- old property value +++ new property value @@ -1 +1 @@ -Dependancy info. +dependency info

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[nut]: r581 - docs/nut.txt
by michael 05 Feb '08

05 Feb '08

Author: michael Date: Mon Feb 4 23:40:57 2008 New Revision: 581 Log: Dependancy info. Modified: docs/nut.txt Modified: docs/nut.txt ============================================================================== --- docs/nut.txt (original) +++ docs/nut.txt Mon Feb 4 23:40:57 2008 @@ -886,6 +886,17 @@ info packet types This stream is a superior alternative (higher resolution or otherwise) of the given stream. It should be preferred if the decoder is capable of decoding it. + "Depends" + v (stream id) + This stream depends on the specified stream. That is if its + unavailable then this stream cannot be decoded. This is used to store + dependancies for scalability for example. + "Uses" + v (stream id) + This stream can use the specified stream. But its existence is not + mandatory for decoding this stream. Although if its unavailable + quality might suffer. Examples are font attachments or higher quality + samples from music instruments. "UsesFont" "Times New Roman", "Arial", ... FIXME should we use the filename instead? is there some other unique way to identify fonts?

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redundant documents in the repository
by Diego Biurrun 05 Feb '08

05 Feb '08

In the repository we have docs/oggless-xiph-codecs.txt src/trunk/docs/draft-xiph-oggless-00.xml The former was written by Michael, the latter by Alex. What's it going to be? Diego

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[nut]: r584 - in docs: draft-xiph-oggless-00.xml oggless-xiph-codecs.txt
by diego 05 Feb '08

05 Feb '08

Author: diego Date: Tue Feb 5 11:00:57 2008 New Revision: 584 Log: Remove outdated drafts about storing Xiph codecs in containers other than Ogg. The information has found a more permanent home at http://wiki.xiph.org/Oggless Removed: docs/draft-xiph-oggless-00.xml docs/oggless-xiph-codecs.txt

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[nut]: r583 - docs/nut.txt
by michael 04 Feb '08

04 Feb '08

Author: michael Date: Tue Feb 5 00:06:29 2008 New Revision: 583 Log: More generic statement. Modified: docs/nut.txt Modified: docs/nut.txt ============================================================================== --- docs/nut.txt (original) +++ docs/nut.txt Tue Feb 5 00:06:29 2008 @@ -947,7 +947,7 @@ redundant and enhanchement streams. So f independant video streams encoding the same content at 2 different bitrates. Then only one is mandatory, which that is, is at the discretion of the muxer. Enhancement streams like font attachments are also non mandatory. -The muxer SHOULD repeat non mandatory stream headers like mandatory ones if +The muxer SHOULD repeat non mandatory headers like mandatory ones if the overhead is not excessive.

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[nut]: r582 - docs/nut.txt
by michael 04 Feb '08

04 Feb '08

Author: michael Date: Tue Feb 5 00:05:01 2008 New Revision: 582 Log: Make nut capable to handle attachments. Alternative suggestions are welcome Modified: docs/nut.txt Modified: docs/nut.txt ============================================================================== --- docs/nut.txt (original) +++ docs/nut.txt Tue Feb 5 00:05:01 2008 @@ -923,8 +923,8 @@ stream_header (id=1) ... stream_header (id=n) -Headers may be repeated, but if they are, then they MUST all be repeated -together and repeated headers MUST be identical. +Headers may be repeated, but if they are, then all mandatory headers MUST be +repeated and repeated headers MUST be identical. Each set of repeated headers not at the beginning or end of the file SHOULD be stored at the earliest possible position after 2^x where x is an integer. @@ -934,12 +934,22 @@ So the headers may be repeated at 4102 i Note: This allows an implementation reading the file to locate backup headers in O(log filesize) time as opposed to O(filesize). -Headers MUST be placed at least at the start of the file and immediately before +All headers MUST be placed at least at the start of the file. +Mandatory headers MUST additionally be placed immediately before the index or at the end of the file if there is no index. -Headers MUST be repeated at least twice (so they exist three times in a file). +Mandatory headers MUST be repeated at least twice (so they exist three times +in a file). There MUST be a syncpoint immediately before the first frame after any headers. +The main header is mandatory, so are all stream headers except thouse for +redundant and enhanchement streams. So for example if the file contains 2 +independant video streams encoding the same content at 2 different bitrates. +Then only one is mandatory, which that is, is at the discretion of the muxer. +Enhancement streams like font attachments are also non mandatory. +The muxer SHOULD repeat non mandatory stream headers like mandatory ones if +the overhead is not excessive. + Index: ------

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[nut]: r580 - src/trunk/nututils/nutparse.c
by ods15 04 Feb '08

04 Feb '08

Author: ods15 Date: Mon Feb 4 11:56:48 2008 New Revision: 580 Log: make nutparse a little more useful in finding the syncpoint a backptr is pointing to. Modified: src/trunk/nututils/nutparse.c Modified: src/trunk/nututils/nutparse.c ============================================================================== --- src/trunk/nututils/nutparse.c (original) +++ src/trunk/nututils/nutparse.c Mon Feb 4 11:56:48 2008 @@ -462,7 +462,7 @@ static void parse_stream_header(void) } } -static void parse_syncpoint(void) +static void parse_syncpoint(uint64_t pos) { uint64_t value, pts; int tbid, i; @@ -476,7 +476,7 @@ static void parse_syncpoint(void) for (i = 0; i < stream_count; ++i) streams[i].last_pts = convert_ts(pts, tbid, streams[i].time_base_id); value = read_var(); - printf(" back_ptr_div16: %"PRIu64" (%"PRIu64")\n", value, value * 16 + 15); + printf(" back_ptr_div16: %"PRIu64" (%"PRIu64") -> 0x%"PRIx64"\n", value, value * 16 + 15, pos - (value * 16 + 15)); } static void parse_index(void) @@ -623,6 +623,8 @@ static void parse_packet(void) uint64_t forward_ptr; uint32_t checksum, actual_checksum; uint64_t end_pos; + uint64_t packet_start = file_position - 1; + int i; /* TODO: check max_distance */ startcode = read_fixed(7) | ((uint64_t)'N' << 56); @@ -646,7 +648,9 @@ static void parse_packet(void) printf("unknown_packet"); break; } - printf(" at 0x%"PRIx64"\n", file_position - 8); + printf(" at 0x%"PRIx64" [0x%"PRIx64, packet_start, packet_start - 1); + for (i = 2; i < 16; i++) printf(" 0x%"PRIx64, packet_start - i); + printf("]\n"); printf(" startcode: 0x%016"PRIx64"\n", startcode); forward_ptr = read_var_restricted(); printf(" forward_ptr: %"PRIu64"\n", forward_ptr); @@ -667,7 +671,7 @@ static void parse_packet(void) parse_stream_header(); break; case SYNCPOINT_STARTCODE: - parse_syncpoint(); + parse_syncpoint(packet_start); break; case INDEX_STARTCODE: end_pos -= 8; /* special handling for index_ptr behind reserved_bytes */

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[nut]: r579 - in src/trunk: Makefile nututils/demux_nut.c
by ods15 04 Feb '08

04 Feb '08

Author: ods15 Date: Mon Feb 4 11:55:34 2008 New Revision: 579 Log: remove demux_nut.c Removed: src/trunk/nututils/demux_nut.c Modified: src/trunk/Makefile Modified: src/trunk/Makefile ============================================================================== --- src/trunk/Makefile (original) +++ src/trunk/Makefile Mon Feb 4 11:55:34 2008 @@ -19,7 +19,7 @@ $(LIBNUT_OBJS): libnut/priv.h libnut/lib nututils: $(NUTUTILS_PROGS) -nututils/nutmerge: nututils/demux_avi.c nututils/demux_ogg.c nututils/framer_mp3.c nututils/framer_mpeg4.c nututils/framer_vorbis.c nututils/nutmerge.h libnut/libnut.a # nututils/demux_nut.c +nututils/nutmerge: nututils/demux_avi.c nututils/demux_ogg.c nututils/framer_mp3.c nututils/framer_mpeg4.c nututils/framer_vorbis.c nututils/nutmerge.h libnut/libnut.a $(NUTUTILS_PROGS): CFLAGS += -Ilibnut

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multiple docs directories
by Diego Biurrun 04 Feb '08

04 Feb '08

In the repository we have multiple docs directories: ./docs: draft-niedermayer-nut-00.xml nut.txt oggless-xiph-codecs.txt ./src/trunk/docs: draft-xiph-oggless-00.xml nut-english.txt The latter one seems to be bogus and probably a remnant from before the repositories were merged. I suggest moving the two documents into the top-level docs/ directory and removing the docs directory below src/. Diego

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[nut]: r578 - homepage/index.html
by diego 04 Feb '08

04 Feb '08

Author: diego Date: Mon Feb 4 11:43:58 2008 New Revision: 578 Log: Remove silly link pointing back to the index page. Modified: homepage/index.html Modified: homepage/index.html ============================================================================== --- homepage/index.html (original) +++ homepage/index.html Mon Feb 4 11:43:58 2008 @@ -16,7 +16,6 @@ <center> - [<a href="index.html">Main Page and News</a>] [<a href="http://svn.mplayerhq.hu/nut/docs/nut.txt?view=co">Specification</a>] [<a href="http://lists.mplayerhq.hu/mailman/listinfo/nut-devel">Mailing List</a>] </center> @@ -49,7 +48,6 @@ and dynamic index generation during play </p> <center> - [<a href="index.html">Main Page and News</a>] [<a href="http://svn.mplayerhq.hu/nut/docs/nut.txt?view=co">Specification</a>] [<a href="http://lists.mplayerhq.hu/mailman/listinfo/nut-devel">Mailing List</a>] </center>

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