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  /external/libvorbis/doc/
a2-encapsulation-rtp.tex 4 \section{Vorbis encapsulation in RTP} \label{vorbis:over:rtp}
8 Please consult RFC 5215 \textit{``RTP Payload Format for Vorbis Encoded
9 Audio''} for description of how to embed Vorbis audio in an RTP stream.
footer.tex 17 Ogg Vorbis is the first Ogg audio CODEC. Anyone may freely use and
18 distribute the Ogg and Vorbis specification, whether in a private,
20 the Ogg project (xiph.org) reserve the right to set the Ogg Vorbis
23 Xiph.org's Vorbis software CODEC implementation is distributed under a
25 distributing independent implementations of Vorbis software under
28 Ogg, Vorbis, Xiph.org Foundation and their logos are trademarks (tm)
a1-encapsulation-ogg.tex 4 \section{Embedding Vorbis into an Ogg stream} \label{vorbis:over:ogg}
9 streams to encapsulate Vorbis compressed audio packet data into file
12 The \xref{vorbis:spec:intro} provides an overview of the construction
13 of Vorbis audio packets.
24 The Ogg/Vorbis I specification currently dictates that Ogg/Vorbis
30 A meta-headerless Ogg file encapsulates the Vorbis I packets
36 The Ogg stream must be unmultiplexed (only one stream, a Vorbis audio stream, per link)
42 Vorbis with other media types into a multi-stream Ogg file. At th
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01-introduction.tex 4 \section{Introduction and Description} \label{vorbis:spec:intro}
8 This document provides a high level description of the Vorbis codec's
10 \xref{vorbis:spec:codec}.
12 understanding of the Vorbis decode process, which is
16 Vorbis is a general purpose perceptual audio CODEC intended to allow
22 without resampling to a lower rate. Vorbis is also intended for
30 Vorbis I is a forward-adaptive monolithic transform CODEC based on the
32 addition of a hybrid wavelet filterbank in Vorbis II to offer better
39 The Vorbis CODEC design assumes a complex, psychoacoustically-aware
40 encoder and simple, low-complexity decoder. Vorbis decode i
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02-bitpacking.tex 4 \section{Bitpacking Convention} \label{vorbis:spec:bitpacking}
8 The Vorbis codec uses relatively unstructured raw packets containing
14 or, less commonly other fixed word sizes. The Vorbis bitpacking
34 bytes (16, 32 or 64 bits). Note however that the Vorbis bitpacking
35 convention is still well defined for any native byte size; Vorbis uses
59 The Vorbis bitpacking convention specifies storage and bitstream
70 The Vorbis codec has need to code arbitrary bit-width integers, from
225 remaining data to fulfill the desired read size. Vorbis uses truncated
09-helper.tex 4 \section{Helper equations} \label{vorbis:spec:helper}
8 The equations below are used in multiple places by the Vorbis codec
15 \subsubsection{ilog} \label{vorbis:spec:ilog}
48 \subsubsection{float32_unpack} \label{vorbis:spec:float32:unpack}
51 representation of a Vorbis codebook float value into the
53 purposes of this example, we will unpack a Vorbis float32 into a
66 \subsubsection{lookup1_values} \label{vorbis:spec:lookup1:values}
81 \subsubsection{low_neighbor} \label{vorbis:spec:low:neighbor}
88 \subsubsection{high_neighbor} \label{vorbis:spec:high:neighbor}
97 \subsubsection{render_point} \label{vorbis:spec:render:point
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04-codec.tex 5 \section{Codec Setup and Packet Decode} \label{vorbis:spec:codec}
10 bit-by-bit decode specification of Vorbis I. This document assumes a
11 high-level understanding of the Vorbis decode process, which is
12 provided in \xref{vorbis:spec:intro}. \xref{vorbis:spec:bitpacking} covers reading and writing bit fields from
19 A Vorbis bitstream begins with three header packets. The header
47 to declare the stream definitively as Vorbis, and provide a few externally
67 Vorbis I. \varname{[blocksize_0]} must be less than or equal to
87 \xref{vorbis:spec:comment}.
92 Vorbis codec setup is configurable to an extreme degree
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Vorbis_I_spec.tex 40 % escaping it (\_ instead of _). Since the Vorbis specs use it a lot,
98 \title{Vorbis I specification}
05-comment.tex 4 \section{comment field and header specification} \label{vorbis:spec:comment}
8 The Vorbis text comment header is the second (of three) header
9 packets that begin a Vorbis bitstream. It is meant for short text
42 to the bit packing conventions of the vorbis codec. However, since data
73 comment[1]="TITLE=the sound of Vorbis";
234 This is actually somewhat easier to describe in code; implementation of the above can be found in \filename{vorbis/lib/info.c}, \function{_vorbis_pack_comment()} and \function{_vorbis_unpack_comment()}.
08-residue.tex 4 \section{Residue setup and decode} \label{vorbis:spec:residue}
15 Whatever the exact qualities, the Vorbis residue abstraction codes the
17 vectors during decode. Vorbis makes use of three different encoding
208 stages (8 in Vorbis I, as constrained by the elements of the cascade
03-codebook.tex 4 \section{Probability Model and Codebooks} \label{vorbis:spec:codebook}
8 Unlike practically every other mainstream audio codec, Vorbis has no
19 The codebook mechanism is built on top of the vorbis bitpacker. Both
22 stream according to \xref{vorbis:spec:bitpacking}.
31 true; see \xref{vorbis:spec:bitpacking} for discussion
123 3) [number] = read \link{vorbis:spec:ilog}{ilog}([codebook_entries] - [current_entry]) bits as an unsigned integer
137 vector lookup table. Vorbis I supports three lookup types:
169 1) [codebook_minimum_value] = \link{vorbis:spec:float32:unpack}{float32_unpack}( read 32 bits as an unsigned integer)
170 2) [codebook_delta_value] = \link{vorbis:spec:float32:unpack}{float32_unpack}( read 32 bits as an unsigned integer)
176 5) [codebook_lookup_values] = \link{vorbis:spec:lookup1:values}{lookup1_values}(\varname{[codebook_entries]}, \varname{[codebook_dimensions]} (…)
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06-floor0.tex 4 \section{Floor type 0 setup and decode} \label{vorbis:spec:floor0}
8 Vorbis floor type zero uses Line Spectral Pair (LSP, also alternately
48 \subsubsection{packet decode} \label{vorbis:spec:floor0-decode}
61 4) [booknumber] = read an unsigned integer of \link{vorbis:spec:ilog}{ilog}( [floor0_number_of_books] ) bits
85 can, in fact, be stored in the bitstream in \link{vorbis:spec:ilog}{ilog}( \varname{[floor0_number_of_books]} -
104 \subsubsection{curve computation} \label{vorbis:spec:floor0-synth}
07-floor1.tex 4 \section{Floor type 1 setup and decode} \label{vorbis:spec:floor1}
8 Vorbis floor type one uses a piecewise straight-line representation to
167 \paragraph{packet decode} \label{vorbis:spec:floor1-decode}
187 2) vector [floor1_Y] element [0] = read \link{vorbis:spec:ilog}{ilog}([range]-1) bits as unsigned integer
188 3) vector [floor1_Y] element [1] = read \link{vorbis:spec:ilog}{ilog}([range]-1) bits as unsigned integer
237 \paragraph{curve computation} \label{vorbis:spec:floor1-synth}
266 7) [low_neighbor_offset] = \link{vorbis:spec:low:neighbor}{low_neighbor}([floor1_X_list],[i])
267 8) [high_neighbor_offset] = \link{vorbis:spec:high:neighbor}{high_neighbor}([floor1_X_list],[i])
269 9) [predicted] = \link{vorbis:spec:render:point}{render_point}( vector [floor1_X_list] element [low_neighbor_offset],
367 8) \link{vorbis:spec:render:line}{render_line}( [lx], [ly], [hx], [hy], [floor]
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  /external/libvorbis/
libvorbis.spec 4 Summary: The Vorbis General Audio Compression Codec.
10 Source: http://downloads.xiph.org/releases/vorbis/%{name}-%{version}.tar.gz
25 Ogg Vorbis is a fully open, non-proprietary, patent-and-royalty-free,
30 Summary: Vorbis Library Development
75 %{_datadir}/aclocal/vorbis.m4
76 %dir %{_includedir}/vorbis
77 %{_includedir}/vorbis/codec.h
78 %{_includedir}/vorbis/vorbisfile.h
79 %{_includedir}/vorbis/vorbisenc.h
89 %{_libdir}/pkgconfig/vorbis.p
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  /external/chromium_org/media/filters/
audio_file_reader_unittest.cc 88 TEST_F(AudioFileReaderTest, Vorbis) {
  /external/speex/libspeex/
arch.h 59 #error Vorbis-psy model currently not implemented in fixed-point

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