XiphWiki - User contributions [en]

OggPCM Draft1

2005-08-20T13:37:26Z

1234:

== What is it ==

'''OggPCM''' is a pulse-code modulation (PCM) audio codec for Ogg. Similar to Microsoft's .wav or Apple's .aiff formats, it's a simple way to store and transfer uncompressed audio within an Ogg container.

== Why is it ==

You're probobally thinking, this is pretty redundant, eh? Well, yes, it is. We have FLAC and, of course, there's .wav and .aiff files when you don't want to go through the hassle of losslessly compressing it.

The intention for this format is as an interchange format, especially for use with [[OggStream]]. It is also useful for storing time-synced decoded audio/video for development, vs RIFF/WAV (.wav) and YUV4MPEG (.yuv) in seperate files as we did with [[Theora]].

It is also less complex than either .wav (RIFF) or .aiff (AIFF), both of these formats being designed for generic multimedia (audio, video, etc). Full compatability with these formats includes support for non-PCM data.

Using raw PCM data, on the other hand, doesn't give us that all-important header which carries information about the number of channels, sample width, and sample frequency. So what we need is a header followed by raw PCM data - nothing more complicated.

== Format ==

Packets are processed as per the value of their first byte. Packets of unknown ID should be silently ignored, providing a convient way to add future expandability which does not break the data format.

An example of how this can be useful is the proposed ReplayGain extension to .wav format: http://replaygain.hydrogenaudio.org/file_format_wav.html

Note that no such extension is planned, nor is the need for a future format forseen, but history has shown that even the most basic formats eventually become obsolete.

Packet 0, BOS, 12 bytes
8 0x00 Header Packet ID
24 "PCM" Codec identifier
8 0x01 Version Major (breaks backwards compatability to increment)
8 0x00 Version Minor (backwards compatable, ie, via extended header)
8 [variable] Number of Channels
8 [variable] Bits per Sample
24 [variable] Samples per Second
2 [variable] Data Type: 0=signed int, 1=unsigned int, 2=float, 3=extended
6 [null] Padding to byte/int - may be used for "extended" data type

Data Packet
8 0xFF Data Packet ID
24 "PCM" Codec identifier, pads data to 32-bits
.. [data] variable length pcm data
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Help:Contents

2005-08-20T13:35:51Z

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Speex

2005-08-20T12:27:59Z

1234:

== About ==

The Speex project maintains a patent-clear audio codec designed for compressing speech data.

== External links ==

[http://www.speex.org Speex homepage]
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Tremor

2005-08-20T12:27:22Z

1234:

Tremor is a fixed-point version of the Ogg Vorbis decoder for those platforms that can't do floating point math.

== Platforms ==

== Texas Instruments TMS320C55x DSP Family ==

Download the generic lowmem source using [http://subversion.tigris.org/ Subversion].
This is probably the version you want to start working with for a DSP.

svn co http://svn.xiph.org/branches/lowmem-branch/Tremor/

There is also a [http://svn.xiph.org/branches/lowmem-no-byte/Tremor/ no-byte branch] for platforms whose smallest data unit is larger than 8 bits.

Required / Suggested Changes to the code as downloaded:

* Roland Wintersteller's various fixes
See the [http://lists.xiph.org/pipermail/tremor/2004-October/001114.html mailing list entry]
* Johannes Sandvall's performance improvements
See the [http://lists.xiph.org/pipermail/tremor/2004-March/000957.html mailing list entry] or just [http://www.sandvall.nu/patch download]
* alloca removal
The TI compiler does not support this.
* misc compiler warning fixes
* hooks to TI DSPLIB functions cfft3216_NOSCALE and cbrev32
These are part of the TI DSPLIB which can be [http://www-s.ti.com/sc/psheets/sprc100/sprc100.zip downloaded] from the TI website.
* [http://lists.xiph.org/pipermail/tremor/attachments/20041029/30a4905c/misc.h 64-bit math functions]
* converting all ints assumed to be 32 bits to ogg_int32_t

== Links ==

* [http://lists.xiph.org/pipermail/tremor/ Tremor Mailing List] - lots of info here, but have to wade through a lot!
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Metadata

2005-08-20T12:26:56Z

1234:

==Motivation==

All the Xiph.org codecs have some internal mechanism for including metadata about the current stream.
Generally, this is one of the codec headers, and in the words of the [http://www.xiph.org/ogg/vorbis/doc/v-comment.html vorbis spec],
"It is meant for short, text comments...much like someone jotting a quick note on the bottom of a CDR."

This works well enough for most things, and can be overloaded/abused (depending on your point of view)
for most other things. But there are three major requirements that point to the design of an external
metadata format; one that can be interleaved with the other streams in a container.

* ''Machinability'' There are a number of items of metadata that a player will want to parse and take action on. While there are usually 'convention' schemes for doing this with the embedded comment headers, this is much easier if there is a separate metadata stream designed for such use, instead of having to do best-effort parsing of natural language comments. For example, a video file with multiple audio tracks can specify the language of each one; a player than can parse these reliably can match them against a language preference list configured by the user to automatically select and begin playback of the best option.

* ''Kitchen Sink'' There are a minority of people who care passionately about having every detail about a track available. In the sense of conserving such information, and providing an equivalent to liner notes for online distribution, this is a goal worth supporting. However, the simple unstructured key-value pairs offered by the inline metadata are unwieldy for this level of detail. How do you tell the 2nd unit Assistant Director from the USA unit Assistant Director? How do you indicate which artist played tenor sax in the solo?

* ''Addressability'' The internal comment metadata headers are by necessity attached to a single content stream. This is useful for some appication, but a limitation in others. In a multiplexed stream, which set of comments refers to the collection as a whole? (By convention, in Ogg, it's the first logical bitstream occuring, but we can do better.) A separate metadata stream type must address this issue of collective metadata while still allowing description of individual streams. It should also allow temporal addressability, so that changes can be described. Because the in-stream comment metadata are part of the codec headers, it cannot change over the course of the stream, and allowing additional comment packets elsewhere in the stream presents seeking challenges. In the Ogg container this can be resolved by inserting a chain boundary, but this is a poor option for very-low-bitrate streams and unreliable transports such as RTP.

==Proposed Solutions==

RDF + dublin core

XML-encoding (generic rdf or CMML?)
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VorbisRTP

2005-08-20T12:26:09Z

1234:

== Vorbis over RTP ==

This page documents current consensus on the RTP payload format for Vorbis audio. This encapsulation is useful for interactive and multicast streaming.

=== Drafts ===

[http://svn.xiph.org/tags/vorbis/libvorbis-1.1.0/doc/draft-kerr-avt-vorbis-rtp-03.txt draft-kerr-avt-vorbis-rtp-03] (now expired) was the last spec attempt and serves as the baseline for current work.

Version 04 of the draft is being written using the XML markup defined in [http://xml.resource.org/public/rfc/html/rfc2629.html RFC2629]. Text and HTML versions of the current draft state are available here:

* [http://www.j-ogg.de/rfc/vorbis-rtp.txt draft-kerr-avt-vorbis-rtp-04.txt]
* [http://www.j-ogg.de/rfc/vorbis-rtp.html draft-kerr-avt-vorbis-rtp-04.html]

=== Issues ===

Basically, we pack Vorbis packets into RTP packets; that's been part of the draft for some time. The hard part is achieving reliable header transmission, since RTP is usually used in combination with a no-guaranteed-delivery networking mechanism. Equally important, in multicast the headers can't be prepended on connection the way icecast does with HTTP streams.

The current suggestion (due to Jack) is that we dispense with the chaining feature of Ogg streams, and only allow a single set of vorbis headers per RTP stream. Since RTP is most often used to stream live or at least individual events, this is not a serious limitation. Even in the "simulated live" case encoded files often have the same set of codebooks, and those that do not can be re-encoded on the fly.

The only real drawback is the loss of a metadata update mechanism. This can be resolved either by using a completely separate metadata stream (which we've always wanted to do anyway) or by altering the spec to allow comment header packets to occur outside the headers. In the later case a recording application would need to insert chaining boundaries and duplicate headers at each metadata change. The former offers the client more control over the metadata stream bandwidth.

=== Design ===

* Vorbis packets get packed into RTP packets
* Header parameters are fixed per stream, so they can be passed in the SDP
* inline in the SDP?
* HTTP reference or other protocol?
* some kind of hash so clients can cache codebooks/parameters
* inline in the RTP stream should also be allowed
* Granulepos becomes timestamp (still in samples)

=== Implementation ===

Tor-Einar Jarnbjo has an [http://www.j-ogg.de/rtp/index.html example implementation] that extends the ideas in the 03 draft a bit.
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HyperFish

2005-08-20T12:25:36Z

1234:

== '''Overview''' ==
This is an experimental subgroup aimed at solving specific project barriers in a timely fashion.

A lot of energy has gone into Xiph, and while producing extremely useful software, it's history is also littered with frustrated, burned out hackers. I'd like to see us evolve a new way of working, and I believe this begins by a subgroup forming a vision, goals, and a strategy towards getting these goals met.

* Hyperfish members will:
** work openly and *transparently*, even if we're the only person working on a project
** report *regularly* to the group how we are progressing (ie, if we're on schedule)
** meet monthly (on IRC) to discuss our progress, timeline, and collectivly brainstorm
 
* Each HyperFish project will have:
** clearly documented purpose and list of needs
** milestones with specific dates for completion
** frequency of progress reports expected, depending on the size of the project and how critical it is
 

If this process proves useful, it will hopefully be adopted by Xiph as standard procedure.

== '''Roadmap''' ==

=== Major Milestone I ===

All Xiph codecs accessable with a single library.

==== [[OggStream]] ====

It's basically what OggFile was suppost to be; a universal Ogg stream handler through "codec plugins" so that media players, stream software, encoders, etc don't have to add support for each codec seperatly. This is a basic foundation for most other projects, since if they are codecs they will reach our audience faster through it and if they're applications they'll be able to use all current and future Ogg codecs with only one API to support.

It needs developer time both for coding and for settling on an easy to implement API that's flexible enough to handle any kind of future codec (including meta/effects codecs).

The first milestone is a rough API blueprint for which future discussion can take place through. This will be documented on [[OggStream|project page]] and ready for discussion by Wed. Nov. 24th.

Future milestone will be discussed and detirmined at the next (first) meeting.

==== libogg2 documentation ====

Currently (afair) only Monty and myself (Arc) know libogg2's API well enough to port existing codec libraries (vorbis, speex, flac) to use it. Documenting libogg2 will allow additional people to get involved in the "fun".

This requires the person writting the docs to get the appropriate information from the source code and by talking to either Monty or Arc (most probobally, some combination of the two).

Milestones:
# function and structure documentation. Work on this has stopped until another volunteer has stepped forward.
#* Date extended Dec. 4th, appx. 10% finished but work has been delayed.
#* From Duelist: I've been I've had pretty bad computer problems... circumstances have changed, I doubt I'll be able to make much progress on the docs anytime soon
# the encode/decode process, or how to actually use it.
# finishing it with figures and zero-copy explaination.

==== writ codec plugin ====

Writ is an extremely simple "codec" and, really, simply needs to be handled by the application. However, a codec plugin is still required to detect and get basic information from the header for OggStream. This is a good place to start because it's simple.

It requires liboggstream to be finished and approximatly 10 hours of Arc's time.

==== libvorbis porting/plugin ====

libvorbis needs to be ported to libogg2 and have a codec plugin written for it.

This requires liboggstream to be finished and libogg2 to be documented (unless Arc or Monty writes it). It will take approximatly 12 hours to port to libogg2 (everything but VorbisFile, which disappears now) and 36 hours to write and debug the codec plugin. Some of this time will be spent working on general OggStream audio issues.

First milestone is libogg2 porting
Second milestone is decode support
Third milestone in encode support

No dates on these milestones can be set until OggStream's timeline is established.

==== libtheora plugin ====

libtheora has already been ported to libogg2 (by Arc), but still needs a codec plugin written for it.

This requires liboggstream to be finished. It will take approximatly 52 hours to write and debug the codec plugin, much of this time will be spent writting raw video format conversion functions.

First milestone is YUV 4:2:0 decode support
Second milestone is YUV 4:2:0 encode support
Third milestone is YUV 4:2:2, 4:4:4, RGB24, and Greyscale conversion

No dates on these milestones can be set until OggStream's timeline is established.

--------------------
I have written conversions for (4:2:0)YUYV, YVYU, YV12, (4:2:2) YUY2, (4:4:4) AYUV, RGB24 and RGB32 already in my directshow project, these could be easily appropriated for this task.

Also most of these generic stream mechanisms already exist in my project (though it is a bit biased towards directshow) and it is based off my own demux library (libOOOgg) and not libogg/libogg2 though it could be used for inspiration/appropriation. It's also written in C++, so this may be unpalatable to some.

Eg. http://svn.xiph.org/trunk/oggdsf/src/lib/core/directshow/dsfOggDemux/OggStreamFactory.cpp

Zen.

==== libspeex plugin ====

libspeex uses it's own bitpacker, so it cannot take advantage of libogg2's zerocopy advantages. Therefore, the codec plugin will use libspeex as it currently exists and "copy" (from memory to bitpacker) the packets into libogg2, or vice versa for decode, as speexenc/speexdec do.

This requires liboggstream to be finished, libogg2 to be documented, and approximatly 48 hours to write and debug the codec plugin (likely half this estimate if the libvorbis plugin author tackles this immediatly afterward).

First milestone is decode support
Second milestone is encode support

==== libflac plugin ====

liboggflac needs to be ported to libogg2 as well as the codec plugin written for it.

This requires liboggstream to be finished, libogg2 to be documented, and the new OggFLAC encapsulation format be standardized so there's not a wasteful repetition of work. It will take approximatly 16 hours to port and 48 hours to write the codec plugin. Again, this would be less if the libvorbis/libspeex author tackled this job as they would already be familiar with how to write audio plugins.

First milestone is decode support
Second milestone is encode support

==== [[MNGOverlay]] plugin ====

It's been suggested that MNG be used not just as video but also for graphical subtitles. This ''may'' mean that this codec acts as a meta/effects codec, inputting video output from another codec and outputting it with the overlay merged properly.

This task needs to be discussed further.

=== Major Milestone II ===

All Free Software media applications which use libogg1 and/or libvorbisfile converted to use the single library solution.

=== Major Milestone III ===

Software that doesn't exist, but should/could be written, which is made easy by single library solution.

== '''Meetings''' ==

We're going to have our next meeting Wednesday, Dec. 15th, 23:59 GMT (7pm EST) on irc.freenode.net channel #HyperFish. See the [[HyperFish0412|Agenda]] for more.

Did the meeting happen? Thx.

Past Meetings:
* [[HyperFish0411|Nov. 2004]] - informal discussion and social networking

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XiphWiki:General disclaimer

2005-08-20T12:25:04Z

1234:

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For pain:
Adults—50 to 150 milligrams (mg) (usually 100 mg) every three or four hours as needed.
Children—1.1 to 1.76 mg per kilogram (kg) (0.44 to 0.8 mg per pound) of body weight, up to a maximum of 100 mg, every three or four hours as needed. Young children will probably take the syrup, rather than tablets. Small doses may need to be measured by a special dropper instead of a teaspoon.
For injection dosage form:
For pain:
Adults—50 to 150 milligrams (mg) (usually 100 mg), injected into a muscle or under the skin every three or four hours as needed. The medicine may also be injected continuously into a vein at a rate of 15 to 35 mg an hour.
Children—1.1 to 1.76 mg per kg (0.44 to 0.8 mg per pound) of body weight, up to a maximum of 100 mg, injected into a muscle or under the skin every three or four hours as needed.
For methadone
For oral solution dosage form:
For pain:
Adults—5 to 20 mg every four to eight hours.
Children—Dose must be determined by your doctor.
For narcotic addiction:
Adults 18 years of age or older—
For detoxification: At first, 15 to 40 mg once a day. Your doctor will gradually decrease the dose you take every day until you do not need the medicine any more.
For maintenance: Dose must be determined by the needs of the individual patient, up to a maximum of 120 mg a day.
Children up to 18 years of age—Special conditions must be met before methadone can be used for narcotic addiction in patients younger than 18 years of age. Use and dose must be determined by your doctor.
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</div>

OggWrit

2005-08-20T12:24:17Z

1234:

== Introduction ==

Ogg Writ is a text phrase codec. While it's primary purpose is to embed subtitles or captions in a [[Theora]] stream, it's design makes it useful for many other purposes. It could provide lyrics to song encoded in [[Vorbis]], a transcript to a political debate or oral history recording encoded in [[Speex]], or even incorporate a live chat session as part of a continuous video stream.

One of the unique aspects of Writ is its discontinuous nature, that is, unlike other Ogg codecs the granules for which seperate packets effect may overlap. See the Granules and Muxing section below for how this works.

== SVN ==

Current Ogg Writ development is on Xiph CVS as package "writ". It's being developed to use libogg2, so you'll need both to work on it. The reference encoder and decoder are available as part of the py-ogg2 package which is available on Xiph SVN at http://svn.xiph.org/trunk/py-ogg2/

== Application Support ==

Writ is still highly speculative and incomplete. It is not supported by any applications at this time.

== Format ==
Writ has been designed so that encoders/decoders can support a bare minimum and be fully compatable with future minor versions. Each minor version adds a new feature, some building on others, adding a new header packet and likely a new field to each body packet.
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Decoders should ignore header packets beyond what they were written to support and also ignore extra fields in data packets beyond their current version. This allows new features to be added without requiring that all software, or even most software, to support them.

Header Packet 0 (BOS, 16 bytes):
8 0x00 (Packet ID, Header 0)
32 "writ" (LSB 0x74697277) (Codec Identification)
8 version (unsigned int, 0 = Alpha)
8 minor version (unsigned int)
32 granulerate_numerator (unsigned int)
32 granulerate_denominator (unsigned int)

Data Packet (each):
8 0xFF (Packet ID, Data Packet)
64 granule_start (signed integer)
32 granule_duration (unsigned integer)
8 text_length (unsigned integer)
** text_string (variable-length UTF-8 string)

'''Minor version 1''' adds multiple language support

Header Packet 1 (Language Definition, 8+ bytes) :
8 0x01 (Packet ID, SubHeader 1)
32 "writ" (LSB 0x74697277) (Codec Identification)
8 num_languages (unsigned int)
[repeated 1+num_languages times] :
8 language_length (unsigned int)
** language_string (0+language_length rfc3066)
8 language_desc_length (unsigned int)
** language_desc_string (0+language_desc_length UTF-8)

Data Packet (each):
8 0xFF (Packet ID, Data Packet)
64 granule_start (signed integer)
32 granule_duration (unsigned integer)
[repeated num_languages times] :
8 text_length (unsigned integer)
** text_string (variable-length UTF-8 string)

'''Minor version 2''' adds text window support

Header Packet 2 (Window Definition, 10+ bytes) :
8 0x02 (Packet ID, SubHeader 2)
32 "writ" (LSB 0x74697277) (Codec Identification)
16 location_scale_x (unsigned int)
16 location_scale_y (unsigned int)
8 num_windows (unsigned int)
[if (window_num > 0) repeated window_num times] :
** location_x (variable length, see below)
** location_y (variable length, see below)
** location_width (variable length, see below)
** location_height (variable length, see below)
2 alignment_x (horizontal alignment, see below)
2 alignment_y (vertical alignment, see below)

Data Packet (each):
8 0xFF (Packet ID, Data Packet)
64 granule_start (signed integer)
32 granule_duration (unsigned integer)
[repeated num_languages times] :
8 text_length (unsigned integer)
** text_string (variable-length UTF-8 string)
[if (window_num > 1)] :
8 window_id (unsigned integer)

=== Example Stream ===
Header Packet 0
version 0
minor version 2
granulenum 1
granuledom 1
\x00writ\x00\x02\x01\x00\x00\x00\x01\x00\x00\x00

Header Packet 1
num_languages 2
Language 0:
language en
language_desc English
Language 1:
language es
language_desc Spanish
\x01writ\x01\x02en\x07English\x02es\x07Spanish

Header Packet 2
location_scale_x 4000 (12 bits)
location_scale_y 270 ( 9 bits)
num_windows 2
Window 0:
location_x 1
location_y 2
location_width 3
location_height 1
alignment_x 3 (Full)
alignment_y 3 (Full)
Window 1:
location_x 5
location_y 6
location_width 7
location_height 1
alignment_x 3 (Full)
alignment_y 3 (Full)
\x02writ\xa0\x0f\x0e\x01\x02\x01\x20\x60\x00\x02\x7c\x01\x18\x38\x80\x00\x0f

Phrase Packet:
granule_start 5
granule_duration 10
Language 0: "Hello World!"
Language 1: "Hola, Mundo!"
window_id 0
\xff\x05\x00\x00\x00\x00\x00\x00\x00\x0a\x00\x00\x00\x0cHello World!\x0cHola, Mundo!\x00

Phrase Packet:
granule_start 12
granule_duration 15
Language 0: "It's a beautiful day to be born."
Language 1: "Es un día hermoso para que se llevará."
window_id 1
\xff\x0c\x00\x00\x00\x00\x00\x00\x00\x0f\x00\x00\x00\x20It's a beautiful day to be born.\x26Es un d\xeda hermoso para que se llevar\xe1.\x01

=== Granules and Muxing ===

Granulepos in Writ (as well as future discontinuous codecs) will be by start time, not end time, that the data in a given page is tagged for. This greatly simplifies this specification.

All Writ phrases will be provided at and given the granulepos of their start time, ordered by their start time within the logical bitstream.

Phrase packets with long durations should be repeated in the logical bitstream at regular intervals to ensure that a player seeking to the middle of their duration will still see them. These packet copies will be identical to their original, including the start and duration fields, the granulepos of the page they reside on will be incremented for each copy to place it forward on the logical bitstream.

No two phrases can start on the same granule. On decoding, each packet's start granule is checked against already known packets. If a match is found the new packet is ignored. This prevents phrase copies from being interpreted as new phrases.

=== Seeking Example ===

Here is a timeline (granule numbers at top, read down) of a sample stream:

<- Granules ->
0000000000111111111122222222223333333333444444444455555555556666666666
0123456789012345678901234567890123456789012345678901234567890123456789
___________ ____________ ____________ ____________ _____________
|_Vorbis____||_Vorbis_____||_Vorbis_____||_Vorbis_____||_Vorbis______|
____________________ ____________________________________
|_A____________>_____| |_D____________>______________>______|
_________ ___ __________ ___________
|_B_______| |_C_| |_E________| |_F_________|
.
(note: these have been seperated vertically for easy viewing only)
.
Packet Granule Description
V H0 0 Vorbis Header 0x01 (page by itself, BOS)
W H0 0 Writ Header 0 (page by itself, BOS)
V H1 0 Vorbis Header 0x03
V H2 0 Vorbis Header 0x05
W H1 0 Writ Header 1 (Language Defs)
W H2 0 Writ Header 2 (Window Defs)
W A 0 Writ Phrase A
W B 4 Writ Phrase B
V 12 Vorbis 0-12
W A 15 Writ Phrase A
W C 19 Writ Phrase C
W D 23 Writ Phrase D
V 26 Vorbis 13-26
W E 26 Writ Phrase E
W D 38 Writ Phrase D
V 40 Vorbis 27-40
W F 41 Writ Phrase F
W D 53 Writ Phrase D (EOS)
V 54 Vorbis 41-54
V 69 Vorbis 55-69 (EOS)

Player begins decoding at beginning of stream. It reads the BOS pages for both codecs, then receives a non-BOS page. At this point it knows that it has two bitstreams to decode and has resolved that one is Writ and the other Vorbis. It'll continue processing the headers for both.

Next it's going to find two Writ packets (phrases A and B) and toss them into libwrit. Then it'll get to the first Vorbis data page. It now has data from both bitstreams, and it knows (from the granulepos on the Vorbis page) that it has enough data to run until 12. If there were any Writ packets before 12 they would have appeared first.

At around granule 9 the listener seeks forward to 24. This will cause a rapid seek through the file to find the first page with a granulepos greater than the seek position and begin decoding at that point.

It'll find a Vorbis packet containing 13-26 (and not use 13-23) and Writ phrase E. Again, having data from both bitstreams it can begin playing. D would normally appear at granule 24 but is not known about yet. The player knows that this is only enough to decode until 26 so, knowing enough to prebuffer, continues reading the file as it plays the media.

The next packet it finds is Writ phrase D, and passing it to libwrit, is found that the current granulepos is within the duration. It is thus displayed immediatly, as it's prebuffered, without waiting for granulepos 38. It'll keep reading (because the maximum decoded Vorbis is still 26) and find a Vorbis packet with a 40 granulepos.

As it nears 38 it'll read the file again and find Writ phrase F, which takes it out to 41. Vorbis only goes until 40, so it'll have to keep reading until the next Vorbis packet.

Next it'll find Writ phrase D, which will be ignored by libwrit because phrase D is already known (matches start granule of earlier D), and the EOS on that page marks this as the last of the Writ stream.

It'll continue reading for the next Vorbis data and find the packet for granule 54, followed by the Vorbis packet for granule 69. With that it's EOS, EOF, finished.

This is of course a simplistic example, Writ and Vorbis will rarely have granules which equal the same amount of time. Each bitstream has its own granule -> time mapping which is calculated when muxing concurrent bitstreams within the file. So if there are 44100 Vorbis granules per second and only 4 Writ granules per second, pages would be ordered as W25 V297892 W31 V385932 W39 W41 V463057 etc. The logic used in the above example works after this granule-time mapping is calculated.

== Past Discussion ==

=== How does this get "encoded" and "merged"? ===
<purple_haese> The muxing rule is pages are arranged in ascending order by the timestamp that is represented by their granulepos.

=== For what reason is the 0x00 and 0xFF byte at the beginning of header and data packet respectively? ===
<xiphmont> If, after a seek, I hand your codec a header packet, what does the codec do?
<xiphmont> It does nothing. If I haven't told it to reset, the header is not data, it must ignore the header.
<xiphmont> this eliminates a huge raft of special cases in Ogg seeking.

MailingLists

2005-08-20T11:58:12Z

1234:

This is a list of all the current Xiph.org mailing lists. Go [http://lists.xiph.org/mailman/listinfo/ here] if you want to subscribe to one or more of them.

We're in need of new mailing list moderators, please contact msmith@xiph.org if you can volunteer to do this for one or more lists (it takes a couple of minutes a day, no more).

List name Description Moderator(s)

Advocacy Xiph.org codec/tool advocacy none
Announce Announcements none
commits Receives full details of all SVN commits none
Flac FLAC users list none
Flac-dev FLAC developers list none
Icecast Icecast users list none
Icecast-dev Icecast developers list none
ogg-dev Ogg format developer discussions none
Paranoia cdparanoia users list none
Paranoia-dev cdparanoia developers list none
Speex-dev The Speex speech codec none
Theora Theora video codec users list none
Theora-codecs ?? none
Theora-dev Theora video codec developers list none
Tremor Tremor (fixed-point vorbis) list none
Vorbis Vorbis audio codec users list none
Vorbis-dev Vorbis audio codec developers list none
xiph-rtp RTP implementation for Xiph codecs none

Other xiph.org mailing lists (no activity in the last six months):
Neurosetta
Paranoia-announce

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VorbisStreams

2005-08-20T00:31:11Z

1234:

These links usually point to the page with instructions on how to listen to a stream, not to the station's main homepage. We don't link directly to the stream because they tend to move around, because the stations like having people visit their websites, and this way you can compare Vorbis with the other legacy proprietary codecs many of these stations still use.

'''Note:''' an [http://web.archive.org/web/20040205045624/wiki.xiph.org/VorbisStreams old version] of this page from before [[WhatHappened|the server crash]] is available through the web archive. We'll slowly be verifying those links are still valid and moving them over.

== Automatically updated directories ==

* [http://dir.xiph.org/ Icecast directory], the official xiph.org directory.

* [http://www.oddsock.org/icecast2yp/ Oddsock directory].

== Live streams ==

* [http://interactive.acbradio.org/ ACB Radio Interactive] Music DJed by blind and partially sighted people from around the globe.

* [http://syntag.net/brasill/ Brazillbient Lounge] easy listening for punk rockers.

* [http://www.cbc.ca/listen/ogg.html CBC Radio One & Two] public radio, Toronto, Canada.

* [http://radio-canada.ca/util/endirect/ogg_vorbis.html Radio-Canada 1 & 2] public radio, Montréal, Québec, Canada (in French).

* [http://www.rozhlas.cz/audio/vysilani/ Český Rozlas] 3 public-radio channels, Czech Republic.

* [http://www.cur1350.co.uk/listen/ CUR 1350-AM] Churchill College student radio, Cambridge, UK.

* [http://www.freirad.at/livestream.html FREIRAD] community radio, Innsbruck, Austria (in German).

* [http://frequence3.org/ frequence3] Frequence3, webradio Francophone, pop+dance, FR.

* [http://www.1287am.com/listen Junction11] University of Reading student radio, Reading, UK.

* [http://www.kcsm.org/fm_listen.html KCSM-FM] jazz music, San Mateo, CA, USA.

* [http://www.kglp.org/stream/ KGLP-FM] public radio, Gallup, NM, USA.

* [http://www.kpfa.org/listen/ KPFA-FM] Pacifica Network public radio, Berkeley, CA, USA.

* [http://www.krcl.org/listenlive.htm KRCL-FM] community radio, Salt Lake City, UT, USA.

* [http://www.kpsu.org/webcast.htm KPSU] Portland State University student radio, Portland, OR, USA.

* [http://www.kqlz.org/index.php KQLZ-FM] rock & roll, Los Angeles, CA, USA.

* [http://home.link-m.de/lora/ LORA München] talk radio, Munich, Germany.

* [http://www.m945.de/ M94.5] student radio, Munich, Germany

* [http://www.nrk.no/lyd/ NRK] Norwegian Broadcasting Corporation, all channels live.

* [http://fm4.baycom.de/ ORF FM-4] pop/rock music, Vienna, Austria.

* [http://www.radio1190.org/castpage2.html Radio 1190] music, University of Colorado at Boulder.

* [http://www.radioakropolis.cz/main.php Radio Akropolis] Prague, Czech Republic.

* [http://live.radiofg.com/ Radio FG] techno music, Paris, France.

* [http://www.radiofrance.fr/services/aide/difflive.php Radio France] 8 channels from Paris.

* [http://no-tcp.no-ip.org:8000 Radio ianux] homegrown music from Bordeaux, France.

* [http://icecast.version6.net:8888/mania.ogg Radio Mania] rock music, Tallinn, Estonia

* [http://www.radiosix.com/listen.html Radio Six International] eclectic music mix, Glasgow, Scotland.

* [http://www.sluchaj.com/ Radio Słuchaj] Poland.

* [http://surge.soton.ac.uk/listen/ Surge] Southampton University student radio, Southampton, UK.

* [http://streaps.org/ STREAPS] Audio Stream Merger

* [http://emisora.univalle.edu.co/nueva.htm Univalle Estereo], Cali, Columbia.

* [http://urn1350.net/live/listen.php URN 1350-AM] student radio, Nottingham, UK.

* [http://www.vancouverfreeradio.com/tunez/ Vancouver Free Radio] independent music, Vancouver, BC, CA.

* [http://www.virginradio.co.uk/thestation/listen/ogg.html Virgin Radio] Virgin Radio, UK.

* [http://www.wcbn.org/ WCBN-FM] University of Michigan student radio, Ann Arbor, MI, USA.

* [http://www.wclv.com/skin/feature.php?sectionId=184 WCLV-FM] classical music, Cleveland, OH, USA.

* [http://wcpe.org/internet.shtml WCPE-FM] classical music, Wake Forest, NC, USA.

* [http://www.wfmu.org/ssaudionet.shtml WFMU-FM] freeform radio, Jersey City, NJ, USA.

* [http://www.wgdr.org/listen_wgdr.html WGDR-FM] community radio, Plainfield, VT, USA.

* [http://www.wickedkarma.com/new2004/listen.php Wicked Karma Live] 4 channels, Sim City.

* [http://wsia.fm WSIA-FM] CUNY student radio, Staten Island, New York, NY, USA.

* [http://www.wxdu.org/listen/index.html WXDU-FM] Duke University student radio, Durham, NC, USA.

* [http://www.tlis.sk/ IRS TLIS] College Radio, Bratislava, Slovakia.

* [http://tilos.hu/ogg/tilos_high.m3u Tilos Radio] public non-mainstream radio in Budapest, Hungary.

* [http://rennet.org/canalb/ CanalB] french radio in Bretagne, France.

* [http://icecast.ghruaim.net:8000/ Electric Radio] cheerful club music.

* [http://oc.ormgas.com/stream.pls?stream=56 ormgas.com] streaming OC Remixes

== Archived streams ==

* [http://www.archive.org/audio/collection.php?collection=democracy_now Democracy Now] is a news program broadcast daily in the USA.

* [http://www2.lugradio.org/index.php LugRadio] is a fortnightly talk show about GNU/Linux and free software.

* [http://www.cbc.ca/quirks/archives.htm Quirks & Quarks] is a science program broadcast weekly in Canada.

* [http://www.ebm-radio.de EBM-Radio] German Radiostation. EBM, Futurepop, Industriel in mp3pro and vorbis

* [http://www.newsfromneptune.com/ News from Neptune] a weekly radio show that covers the news of the week and its coverage by the media.

== Discontinued streams ==

These streams are no longer working; they are mentioned for historical interest.

* [http://support.bbc.co.uk/ogg/ BBC test stream] offline since 2003-01-03.

* [http://radioqualia.va.com.au/freeradiolinux/ Free radio Linux] speech synthesizer reading the Linux source code, offline since mid-2004.

* [http://www.liberationradio.net/ San Francisco Liberation Radio] busted by the feds, offline since 2003-10-15.

== Stream statistics ==

These are links to stream-usage statistics.

* [http://theclassicalstation.org/stats.shtml WCPE statistics] for five codec types

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Main Page

2005-08-20T00:30:37Z

1234:

= Projects/Formats =

In an effort to bring open-source ideals to the world of multimedia The Xiph.org Foundation ([[XiphOrg]]) develops a multitude of amazing products.

== Container Formats ==

* [[Ogg]]: Media container. This is our native format and the recommeded container for Xiph codecs.
* [[OggSkeleton]]: Skeleton information on all logical content bitstreams in Ogg

* [[SpeexRTP]]: RTP payload format for voice
* [[VorbisRTP]]: RTP payload format for general audio
* [[TheoraRTP]]: RTP payload format for video

== Codecs ==

* [[Vorbis]]: Audio codec
* [[Tremor]]: Fixed-point decoder
* [[Theora]]: Video codec
* [[FLAC]]: Free Lossless Audio Codec
* [[Speex]]: Speech codec
* [[Ogg Writ]]: Text phrase codec (e.g. subtitles)
* [[Metadata]]: Arbitrary metadata stream format (vapourware so far)
* [[OggMNG]]: A mapping for encapsulating the MNG animation format in Ogg

== Software for distributing media ==

* [[Icecast]]: Streaming server
* [[Ices]]: Source client for Icecast servers
* [[IceShare]]: P2P content distribution

= Demonstrations =

Want to hear Xiph in action? These projects are using our codecs, formats, or libraries.

* [[VorbisStreams]]: Stations streaming with the Vorbis codec
* [[Games that use Vorbis]]: Games using the Vorbis codec for music or sound effects
* [[VorbisHardware]]: Hardware players using the Vorbis codec
* [http://www.tversity.com TVersity Media Server]: A UPNP/AV compliant media server that uses the Ogg Vorbis libraries to transcode audio files to the Ogg Vorbis format.

= Project management =

* [[MonthlyMeeting]]
* [[MailingLists]]
* [[Bounties]]
* [[HyperFish]]

= Wiki internal =
* [[Sandbox]]: Testbed for testing editing skills.
* [[Translations]]: What about some translation work

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Vorbis Software Players

2005-08-20T00:27:34Z

1234:

Here is a list of media players for various OSes that comes with "out-of-the-box" support for Ogg Vorbis.

= DOS =

* [http://www.geocities.com/mpxplay/ mpxplay]: supports many formats

= Linux/BSD =

* [http://www.xmms.org/ XMMS]
* [http://www.rhythmbox.org/ Rhythmbox]
* [http://developer.kde.org/~wheeler/juk.html JuK]: Open Source player for KDE with support for Ogg Vorbis, FLAC and MP3.
* [http://amarok.kde.org/ amaroK]
* [http://muine.gooeylinux.org/ Muine]: Open Source player for GNOME with support for Ogg Vorbis, FLAC and MP3.
* [http://musik.berlios.de/ wxMusik]: Open Source player with support for Ogg Vorbis, as well as MP3, WAV and AIFF. Makes use of an SQL based media libary for quick searching.
* [http://musicpd.org/ MPD]: Music Player Daemon is a sound server that supports different clients. Supports many formats, among them Ogg Vorbis and FLAC
* [http://www.alsaplayer.org/ AlsaPlayer]: ALSA audio player - "First player worldwide that did perfect reverse Ogg playback!"
* [http://sonic-rainbow.sourceforge.net/ Sonic-Rainbow]
* [http://www.tf.hut.fi/~flu/cplay/ Cplay]: Curses frontend for ogg123, mpg123 etc
* [http://xinehq.de/ Xine]: Video player with long list of supported formats
* [http://noatun.kde.org/ Noatun]: KDE audio player
* [http://www.cajun.nu/ CAJUN]: Car audio system
* [http://www.giantdisc.org/ GiantDisc]: Jukebox system that can be controlled by a Palm
* [http://rikkus.info/squelch.html s.q.u.e.l.c.h.]: Vorbis only player
* [http://www.mythtv.org/ MythTV]: PVR project
* [http://www.sosdg.org/~larne/w/BMP_Homepage Beep Media Player (a.k.a. BMP)]: XMMS fork that uses GTK+ 2.x and is compatible with both XMMS and Winamp skins
* [http://gqmpeg.sourceforge.net/ GQmpeg]: GTK frontend for mpg123/ogg123 etc
* [http://bossogg.wishy.org/ BossOgg]: Jukebox system
* [http://gmerlin.sourceforge.net/ Gmerlin]:
* [http://www.luga.de/pytone/ PyTone]: Python-based jukebox player

= MacOS X =

* [http://www.whamb.com/ Whamb]: Freeware player with support for Ogg Vorbis, MP3 and Audio CDs.

= Multi-platform =

* [http://www.videolan.org/vlc/ VLC]: Open Source player that support virtually every video and audio format.
* [http://www.mplayerhq.hu/ Mplayer]: Open Source video player that supports also many audio formats.
* [http://www.jcraft.com/jorbis/ JOrbisPlayer]: Java Player that uses the [[JOrbis]] Java decoder
* [http://www.javazoom.net/jlgui/jlgui.html jlGui]: Winamp clone for Java
* [http://www.zinf.org/ Zinf]: Open Source player with support for Ogg Vorbis, as well as MP3, WAV and Audio CDs.
* [http://snackamp.sourceforge.net/ SnackAmp]: Tcl/Tk player
* [https://player.helixcommunity.org/ HelixPlayer]: Open source player from RealNetworks
* [http://www.real.com/ RealPlayer]: Commercial player from RealNetworks
* [http://www.windowsmedia.com/ Microsoft Windows Media Player]: Freeware player from Microsoft. Runs on both Windows and Macintosh platforms.

= Other =

* [http://english.gamepark.com/ GamePark32]:
:The GP32, an arm9tdmi portable console with much hackability (gcc3 toolchain, expandable memory), has several [http://www.gp32x.com/ Vorbis players] available.
* [http://www.sharp-usa.com/products/TypeLanding/0,1056,112,00.html Sharp’s Zaurus]:
:The Zaurus, a very flexible PDA which runs Linux, can play Vorbis files with a variety of software, including a [http://www.killefiz.de/zaurus/showdetail.php?app=617 plugin] for the default media player, [http://www.killefiz.de/zaurus/showdetail.php?app=423 xmms], [http://www.killefiz.de/zaurus/showdetail.php?app=201 ogg123], [http://www.killefiz.de/zaurus/showdetail.php?app=803 mplayer], or [http://www.thekompany.com/embedded/tkcplayer/ theKompany.com’s tkcPlayer].
* [http://www.xbox.com/ Xbox]:
:The [http://www.xboxmediacenter.de/ Xbox Media Center] is an open source project that transforms a modded Xbox with Linux into a media center and streaming client.
* [http://www.playstation.com/ Playstation 2]:
: The [http://www.trend-express.com/en/medio.html Media Digital Media Player] is a streaming client solution for the Playstation 2.

= PalmOS =

* [http://www.pocket-tunes.com/ Pocket Tunes]: Commercial software: $14.95, free 15-day trial.
* [http://www.aerodromesoftware.com/ AeroPlayer]: Free for Ogg. Mp3 Support costs $20.00.
* [http://poggpl.sourceforge.net/ POggPl]: A free open source player, that is still in alpha-stage.
* [http://sourceforge.net/projects/magiclantern/ The Magic Lantern]: Another open source player in alpha-stage.

= PocketPC =

* [http://www.conduits.com/ce/player/download.asp Conduits Pocket Player]: Commercial player, free evaluation available.
* [http://hp.vector.co.jp/authors/VA032810/ GSPlayer]: This is a free player.
* [http://www.cyanwerks.com/pocketogg/ PocketOgg]: Open Source player that uses [[Tremor]]
* [http://www.pocketmind.com/pmfp.htm PocketMusic]: Commercial player.
* [http://tcpmp.corecodec.org The Core Pocket Media Player]: (Formerly BetaPlayer) Open source media player that uses [[Tremor]]

= Symbian =

* [http://symbianoggplay.sourceforge.net/ OggPlay]

= Windows =

* [http://www.winamp.com/ WinAmp]: very popular player supporting many formats
* [http://www.foobar2000.org/ Foobar2000]: freeware player with complex options and support for Ogg Vorbis, MP3, WAV and more.
* [http://www.quinnware.com/ Quintessential Player]: Freeware player with support for Ogg Vorbis, MP3, WAV and Audio CDs. Also includes CD Ripping.
* [http://musik.berlios.de/ wxMusik]: Open Source player with support for Ogg Vorbis, as well as MP3, WAV, AIFF and WMA. Makes use of an SQL based media libary for quick searching.
* [http://coolplayer.sourceforge.net/ Coolplayer]: very small Open Source player
* [http://www.dbpoweramp.com/ dbPowerAmp]: player suite
* [http://sonique.lycos.com/ Sonique]: player similar to WinAmp
* [http://www.un4seen.com/ XMPlay]
* [http://www.ashampoo.com/ Ashampoo Media Player+]: Audio and video player
* [http://www.deliplayer.com/ DeliPlayer]:
* [http://www.musicex.com/mediajukebox/ MediaJukebox]: Audio management
* [http://www.muzikbrowzer.com/ MuzikBrowser]: Player designed for display on a TV screen
* [http://music.predixis.com/ MusicMagic Mixer]: Player with playlist management
* [http://mediaportal.sourceforge.net/ MediaPortal]: Open source home theater software
* [http://mac.sourceforge.net/ MPEG Audio Collection]: Organizer for music collection

----

''For hardware "mp3-players" that support Ogg Vorbis see [[VorbisHardware]]''

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Vorbis Encoders

2005-08-20T00:27:12Z

1234:

For Mac OS X, here's a QuickTime [[http://qtcomponents.sourceforge.net/ Export Component]].
: ''[http://sourceforge.net/forum/forum.php?thread_id=1295394&forum_id=135636 reported] orphaned, broken on sourceforge project forums.''
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OggStream

2005-08-20T00:26:43Z

1234:

== Goals ==

* Abstract:
** application (app) can be nothing more than a gui frontend to liboggstream
*** allows very simple media players, editors, and stream systems to be developed
*** minimizes duplicated effort (and thus faster deployment)
*** ensures consistant Ogg support for all media players (ie, chaining, seeking, etc)
** can also be used to just decode codecs, choosing to handle file/stream receiving

* Technical:
** apps need to know information about a stream;
*** what codecs it contains
*** what its total length is (or non-seekable)
** apps need to be able to exchange uncompressed data with the library for encoding/decoding
** for non-transcoding operations (ie, streaming), apps also need to be able to exchange raw codec packets
** when meta/effects codecs are available, apps need to be able to access "processed" and "unprocessed" data
** support multiple "protocol" plugins (ie, file, http, etc)
*** must provide buffered/cached info for app. (ie, for seek bar to show buffer status)
**** makes it easy to show holes in stream
*** allow app to provide data through "pipe" or "memory" protocol plugin
** "Auto Update" system for automatic plugin search/installation from central site
*** list licenses and restrictions
**** it should prefer Xiph, then Free, then Proprietary, and finally Commercial
**** this can either be based on their country or simply run with US IP law
*** Linux-based systems can use distro-specific installation method (Gentoo can use Portage, Redhat use RPM, etc)

== API ==

You'll find the most recent API design at http://svn.xiph.org/experimental/arc/ogg2+oggs/include/ogg2/

=== Application API ===

=== Plugin API ===

There are three kinds of plugins: input plugins, codec plugins, and output plugins. These plugins are chained together by liboggstream to connect a "circuit" from the input(s) to the output(s) which fufill the requirements of the client. If a "circuit" cannot be established liboggstream should return an appropriate error, whereas the application can utilize the plugin browser functions to find and install the missing plugins through an appropriate method.

'''Input Plugins''' have a method and output a specific format. This format is provided after the plugin is initialized. Multiple input plugins may be opened to pull data from multiple sources (ie, an audio source and video source).

'''Codec Plugins''' change the data from one format to another. In almost every case they are needed to satisfy the requirements of the application to process the input format to the output format. They can be used in series to satisfy requirements.

'''Output Plugins''' send the formatted data (encoded, transcoded, or decoded) to it's final destination. It needs an output method and is opened with a specific input format. Some output plugins may only support one format (Ogg, pcm, yuv, etc).

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YeppGavDetails

2005-08-20T00:26:13Z

1234:

=== Processing file "./Vendor: Xiphophorus libVorbis I 20010225 (1.0 beta 4)/01 - Sunday Bloody Sunday.ogg"... ===

New logical stream (#1, serial: 74e2a24d): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiphophorus libVorbis I 20010225 (1.0 beta 4)
Channels: 2
Rate: 44100
Nominal bitrate: 128.000000 kb/s
Upper bitrate not set
Lower bitrate not set
User comments section follows...
title=Sunday Bloody Sunday
artist=U2
album=War
date=1990
tracknumber=01/10
genre=Pop
Vorbis stream 1:
Total data length: 4576938 bytes
Playback length: 4m:37.226s
Average bitrate: 132.077857 kbps
Logical stream 1 ended

=== Processing file "./Vendor: Xiph.Org libVorbis I 20020717 (1.0)/01 - Inferno (Unleash The Fire).ogg"... ===

New logical stream (#1, serial: 726955b3): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiph.Org libVorbis I 20020717 (1.0)
Channels: 2
Rate: 44100
Nominal bitrate: 160.003000 kb/s
Upper bitrate not set
Lower bitrate not set
User comments section follows...
title=Inferno (Unleash The Fire)
artist=Symphony X
album=The Odyssey
date=2002
tracknumber=01/08
genre=Symphonic Rock
comment=
=
SOURCEMEDIA=CD
ENCODING=OggEnc v1.0 (libvorbis 1.0) -q 5
organization=InsideOutMusic
labelno=IOMCD 109 / IOMACD 2044 / SPV 085-65342 CD
REPLAYGAIN_TRACK_PEAK=1.07825959
REPLAYGAIN_TRACK_GAIN=-7.71 dB
REPLAYGAIN_ALBUM_PEAK=1.13985360
REPLAYGAIN_ALBUM_GAIN=-7.98 dB
Vorbis stream 1:
Total data length: 6602508 bytes
Playback length: 5m:32.706s
Average bitrate: 158.758658 kbps
Logical stream 1 ended

=== Processing file "./Vendor: Xiphophorus libVorbis I 20010813 (1.0 rc2)/01 - Devil's Haircut.ogg"... ===

New logical stream (#1, serial: 31b72473): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiphophorus libVorbis I 20010813 (1.0 rc2)
Channels: 2
Rate: 44100
Nominal bitrate: 192.000000 kb/s
Upper bitrate not set
Lower bitrate not set
User comments section follows...
title=Devil's Haircut
artist=Beck
album=Odelay
date=1996
tracknumber=01/13
genre=Rock
Vorbis stream 1:
Total data length: 4408552 bytes
Playback length: 3m:14.066s
Average bitrate: 181.733507 kbps
Logical stream 1 ended

=== Processing file "./Vendor: Xiphophorus libVorbis I 20001031 (1.0 beta 3)/01 - A Day Without Rain.ogg"... ===

New logical stream (#1, serial: 40e370bc): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiphophorus libVorbis I 20001031 (1.0 beta 3)
Channels: 2
Rate: 44100
Nominal bitrate: 160.000000 kb/s
Upper bitrate not set
Lower bitrate not set
User comments section follows...
title=A Day Without Rain
artist=Enya
album=A Day Without Rain
date=2000
tracknumber=01/12
Vorbis stream 1:
Total data length: 2890711 bytes
Playback length: 2m:38.226s
Average bitrate: 146.155439 kbps
Logical stream 1 ended

=== Processing file "./Vendor: Xiphophorus libVorbis I 20000508 (1.0 beta 1 or beta 2)/01 - In Tenebris.ogg"... ===

New logical stream (#1, serial: 000062d4): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiphophorus libVorbis I 20000508 (1.0 beta 1 or beta 2)
Channels: 2
Rate: 44100
Nominal bitrate not set
Upper bitrate not set
Lower bitrate not set
User comments section follows...
title=In Tenebris
artist=Rhapsody
album=Power Of The Dragonflame
date=2002
tracknumber=01/10
genre=Progressive Rock
Vorbis stream 1:
Total data length: 1812739 bytes
Playback length: 1m:28.533s
Average bitrate: 163.801717 kbps
Logical stream 1 ended

=== Processing file "./Vendor: Xiphophorus libVorbis I 20011231 (1.0 rc3)/01 - Encore Une Chance.ogg"... ===

New logical stream (#1, serial: 1920d57d): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiphophorus libVorbis I 20011231 (1.0 rc3)
Channels: 2
Rate: 44100
Nominal bitrate: 112.015000 kb/s
Upper bitrate not set
Lower bitrate not set
User comments section follows...
title=Encore Une Chance
artist=Noisy Fate
album=Avoir L'air
date=2001
tracknumber=01/13
genre=Rock
kde-encoder=kio_audiocd
Vorbis stream 1:
Total data length: 3128897 bytes
Playback length: 3m:38.538s
Average bitrate: 114.538736 kbps
Logical stream 1 ended

=== Processing file "./Vendor: Xiph.Org libVorbis I 20030909 (1.0.1)/01 - You Will Be a Hot Dancer.ogg"... ===

New logical stream (#1, serial: 3d4f4f3c): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiph.Org libVorbis I 20030909 (1.0.1)
Channels: 2
Rate: 44100
Nominal bitrate: 128.000000 kb/s
Upper bitrate not set
Lower bitrate not set
User comments section follows...
title=You Will Be a Hot Dancer
artist=Incubus
album=Fungus Amongus
date=1995
tracknumber=01/10
genre=Rock
Vorbis stream 1:
Total data length: 3517563 bytes
Playback length: 3m:47.026s
Average bitrate: 123.952417 kbps
Logical stream 1 ended

=== Processing file "./Vendor: Xiphophorus libVorbis I 20010615 (1.0 rc1)/01 - Remede.ogg"... ===

New logical stream (#1, serial: 7ef6d8b1): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiphophorus libVorbis I 20010615 (1.0 rc1)
Channels: 2
Rate: 44100
Nominal bitrate: 128.000000 kb/s
Upper bitrate not set
Lower bitrate not set
User comments section follows...
title=Remede
artist=Mass Hysteria
album=De Cercle En Cercle
date=2002
tracknumber=01/13
genre=Metal
Vorbis stream 1:
Total data length: 5081049 bytes
Playback length: 5m:22.000s
Average bitrate: 126.237242 kbps
Logical stream 1 ended
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Vorbis Hardware

2005-08-20T00:25:44Z

1234:

This is a list of hardware of all categories, from mobile players to chipsets, that support Ogg Vorbis.

There are currently more than 40 different companies offering a total of more than a hundred products that support decoding Ogg Vorbis. Most likely you'll find a product that meets your demands, if not, come back next week. New products are added on a weekly basis, as many companies are working to support it on their hardware.

If you know of any other hardware or projects, please add them to the list. More hardware info can be found at [http://www.xiph.org/ogg/vorbis/hardware.html vorbis hardware page].

== Consumer products ==

These players support Ogg Vorbis either out of the box or after a firmware upgrade.

* [[PortablePlayers]]: mobile players
* [[StaticPlayers]]: installed players

For hardware that is able to run third-party software (such as PDAs), please visit [[VorbisSoftwarePlayers]].

== Non-consumer products ==

This is Vorbis in Silicon, meaning chips from which actual consumer products can be built.

* [http://oggonachip.sourceforge.net/ Ogg On A Chip]
:A hardware/software implementation with a good report showing how to make FPGAs and the like to decode Vorbis streams.

* [http://www.finearch.com/english FineArch]
:FineArch, Inc. developed a hardware core and control software for decoding Vorbis. This technology can be integrated into portable players or cell phones, and since it runs at only 12MHz, it uses very little battery power. It supports files up to 64Kb/s, but could be scaled to 16MHz and 128Kb/s, at the expense of battery life. For more information, see FineArch’s [http://www.finearch.com/english/news/pr_20030715/pr_20030715.htm press release].

* [http://www.mcslogic.com/ MCS Logic]
:MCS Logic creates single chip decoders that can play Ogg Vorbis. They supply the Vorbis decoding chips for Havin and Freemax.

* [http://www.telechips.com Telechips]
:Telechips has developed the TCC72x, a single chip decoder that can play Vorbis. The TCC72x series is based on on an ARM940T core, and it is used widely in Korea for players such as Iops or MobiBlu.

* [http://www.tamulsite.co.kr Tamul Multimedia]
:Tamul Multimedia manufactures decoding chips for Samsung. They claim they have Ogg Vorbis decoding firmware, according to [http://www.dt.co.kr/print.html?gisaid=2003031002011367704002 <em>The Digital Times</em>] (Korean).

* [http://www.sigmatel.com/ SigmaTel]
:SigmaTel hasn't announced anything that we've heard, but we do like this quote:
<blockquote>"<i>I talked to Deborah Clark, product marketing engineer for audio chipmaker Sigmatel out of Austin, Tex. She is the company's expert in audio decoders. She says there is a growing base of support for Ogg Vorbis. "We can't keep paying these high licensing fees for this. Manufacturers would flock to something that's free." </i></blockquote>
:from a 2000 [http://www.forbes.com/2000/09/18/dvorak_index.html column in Forbes]

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