Commit 52df9c61 authored by Ralph Giles's avatar Ralph Giles Committed by Erik de Castro Lopo

Flac-in-mp4 draft v0.0.1.

Draft updates in response to feedback from Timothy B. Terriberry
and Jean-Yves Avenard.
Signed-off-by: default avatarErik de Castro Lopo <erikd@mega-nerd.com>
parent 4bbd73a8
Encapsulation of FLAC in ISO Base Media File Format
Version 0.0.0 (early draft)
Version 0.0.1 (draft)
Table of Contents
1 Scope
......@@ -19,7 +19,8 @@ Table of Contents
4.4 Basic Structure (informative)
4.4.1 Initial Movie
4.5 Example of Encapsulation (informative)
5 Author's Address
5 Acknowledgements
6 Author's Address
1 Scope
......@@ -71,8 +72,6 @@ Table of Contents
for any PCM sample, a timestamp exactly matching its sampling
timestamp is present in the media timeline.
3.4 native metadata
4 Design Rules of Encapsulation
......@@ -119,8 +118,6 @@ Table of Contents
lapping is required. See section 'Random Access' for
further details.
FLAC native metadata
4.3 Definition of a FLAC sample
4.3.1 Sample entry format
......@@ -211,14 +208,25 @@ Table of Contents
unsigned int(8) MetadataBlockData[BlockLength];
}
aligned(8) class FLACSpecificBox extends Box('dfLa'){
aligned(8) class FLACSpecificBox
(unsigned int32 MetadataBlocks) extends Box('dfLa'){
unsigned int(8) Version;
unsigned int(8) MetadataBlocks;
for(i=0; i <= MetadataBlocks; i++){
FLACMetadataBlock();
}
}
+ MetadataBlocks:
The number of FLAC[3] native metadata blocks to
follow. This value must be at least 1 as a native
METADATA_BLOCK_STREAMINFO structure is required to
decode FLAC audio data.
This value is not coded as the end of the
FLACMetadataBlock list can be intuited from the
LastMetadataBlockFlag (see below).
+ Version:
The Version field shall be set to 0.
......@@ -228,14 +236,7 @@ Table of Contents
of those values, the reader shall not read the fields
after this within the FLACSpecificBox.
+ MetadataBlocks:
The number of FLAC[3] native metadata blocks to
follow. This value must be at least 1 as a native
METADATA_BLOCK_STREAMINFO structure is required to
decode FLAC audio data.
These fields are followed by a sequence of FLAC[3]
The Version field is followed by a sequence of FLAC[3]
native-metadata block structures that fill the remainder
of the box length.
......@@ -348,14 +349,6 @@ Table of Contents
track. The sample_is_non_sync_sample field for FLAC
samples shall be set to 0.
4.3.6.2 Pre-roll
FLAC bitstreams do not require pre-roll or
multi-sample synchronization. All samples
independently decode directly to a complete set of
valid samples. NeitherAudioRollRecoveryEntry nor AudioPreRollEntry
shall be used.
4.4 Basic Structure (informative)
4.4.1 Initial Movie
......@@ -422,11 +415,11 @@ Table of Contents
It is strongly recommended that the order of boxes should
follow the above structure. Boxes marked with an asterisk
(*) may be present. For most boxes listed above, the
definition is as is defined in ISO/IEC 14496-12 [1]. The
additional boxes and the additional requirements,
restrictions and recommendations to the other boxes are
described in this specification.
(*) may or may not be present depending on context. For
most boxes listed above, the definition is as is defined
in ISO/IEC 14496-12 [1]. The additional boxes and the
additional requirements, restrictions and recommendations
to the other boxes are described in this specification.
4.5 Example of Encapsulation (informative)
[File]
......@@ -658,5 +651,11 @@ Table of Contents
position = 678
size = 17001
5 Authors' Address
Monty Montgomery <monty@xiph.org>
5 Acknowledgements
This spec draws heavily from the Opus-in-ISOBMFF specification
work done by Yusuke Nakamura <muken.the.vfrmaniac |at| gmail.com>
6 Authors' Address
Monty Montgomery <cmontgomery@mozilla.com>
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment