The CL adds another way of writing editable video
tracks where the samples will be interleaved with the
primary track samples in the "mdat" box.
PiperOrigin-RevId: 665313751
The parameter class will allow addition of more
parameters (link shouldInterleaveSamples), which are specific to
editable video file format.
PiperOrigin-RevId: 662923844
The TrackToken is primarily for public API.
Using Track object internally will remove unnecessary
type casting at various places.
PiperOrigin-RevId: 662564224
There are two ways to write editable tracks samples.
1. In the embedded edit data MP4.
2. Interleaved with primary tracks samples.
Initial plan was to support only option 1 but then the
decision is to support both ways. To identify between these two
an additional key will be required.
Option 2 is yet to be implemented in Mp4Muxer.
PiperOrigin-RevId: 658791214
Creating a moov box is same as creating any other box so
there is no particular need to have a separate class for this.
In a follow up CL the method will be moved into Boxes.java along with
other box creation methods.
Made nit changes in the final fields ordering to match with
constructor parameter ordering.
PiperOrigin-RevId: 653602558
Boxes.moov() simply wraps the subboxes and this logic can be
put into main method which has all the logic of creating moov box.
This is to eventually move Mp4MoovStucture.moov() into
Boxes.java where all other box creation methods are already present.
PiperOrigin-RevId: 653319292
All other AndroidX libraries have already increased their min SDK to
21.
This change renames private symbols to remove `V21` suffixes and
similar, but doesn't change public or protected symbols with similar
names, to avoid needless breakages/churn on users of the library.
Some of the dead code removal is more complex, so I've split it out
into follow-up changes to make it easier to review.
PiperOrigin-RevId: 651776556
Add support for MPEG4 codec to enable muxing video encoded with the mp4v-es codec. Use esdsBox method to generate esds box required for Mp4v box.
PiperOrigin-RevId: 651000744
Some external media files have CodecSpecificData greater than 128 bytes. Currently, that size
isn't fitting in one byte. Hence, added support to store large CodecSpecificDataSize, as per
ISO standard, by extending to more than one byte as required.
PiperOrigin-RevId: 650972472
Since the muxer supported only AAC audio codec, the esdsBox was unconditionally created within the audioSampleEntry. This CL refactors the box creation logic by moving it to the codecSpecificBox method. This is to make adding support for new audio codecs easier.
PiperOrigin-RevId: 650130935
Add the following NAL unit parsing utility functions that will be needed for the MV-HEVC support as proposed in Apple's HEVC stereo video interoperability profile:
- NAL unit header parsing to get the layer information needed for MV-HEVC support.
- VPS parsing, including vps_extension() needed for MV-HEVC support.
- SPS parsing modifications to support MV-HEVC.
PiperOrigin-RevId: 647329211
This is done by reserving some space for moov box at the start of the file and writing it there if it fits. If it doesn't fit, then it is written at the end of the file.
PiperOrigin-RevId: 643944698
Muxer never uses latest output position but always writes to
a specific location, so restoring its position does not add any
value.
PiperOrigin-RevId: 642996941
Add composition time offset parameter to TRUN box to
support muxing of videos containing B-frames by FragmentedMp4Muxer.
Update TRUN box version from 0 to 1 in order to manage signed
composition time offset.
PiperOrigin-RevId: 636426397
Add ctts box implementation to handle muxing B-frame videos.
Add method convertPresentationTimestampsToCompositionOffset to
provide sample offsets. Return empty ctts box in case of video
does not contain B-frame. Add ctts box to MoovStructure to handle
muxing the video containing B-frames.
PiperOrigin-RevId: 633537106
The keys and ilst boxes in the MP4 muxer were allocated
with a fixed size of 200 bytes. This was not enough to
store the keys and values of large metadata entries, which
could cause the muxer to throw an exception. This CL allocates
the correct size for the keys and ilst boxes based on the size of the metadata entries.
PiperOrigin-RevId: 630331680
