Commit graph

259 commits

Author SHA1 Message Date
Tim-Philipp Müller
bb786dfb5c typefinding: assume EBML files without doctype are matroska
https://bugzilla.gnome.org/show_bug.cgi?id=638019
2010-12-29 22:36:41 +00:00
David Schleef
525776df79 typefind: Add check for yuv4mpeg 2010-12-14 00:40:58 -08:00
Stefan Kost
7728f3d3a7 typefinders: name "aac" typefinder "audio/aac"
This is in sync how we call the others.
2010-12-13 10:42:02 +02:00
Mark Nauwelaerts
ea7349e4c7 typefinding: improve iso media typefinding
... by also considering compatible brands rather than only aiming at major brand
(of which there are a seemingly ever expanding great many).
2010-12-08 12:55:24 +01:00
René Stadler
1e75501c10 typefind: ignore AC-3 BSIDs 9, 10 and >16
These are reserved for future extensions which will not be backwards
compatible to E-AC-3.
2010-12-07 21:28:20 +02:00
René Stadler
725968c612 typefind: accept consecutive AC-3 frames of different sizes
This is perfectly valid and occurs in particular when there are
(in)dependent substreams present.
2010-12-07 21:28:20 +02:00
René Stadler
0e39c62878 typefind: remove useless masking in (E-)AC-3 typefinders 2010-12-07 21:28:20 +02:00
René Stadler
cc65ba987a typefind: stop scanning after suggesting E-AC-3 caps 2010-12-07 21:28:20 +02:00
René Stadler
886ea051e7 typefind: fix E-AC-3 frame size parsing
Frame size is given in words; it is already multiplied by two where
needed, so the left shift is superfluous. This extra multiplication
caused the code to inspect the third packet instead of the second,
which would fail for files where the second packet has a size
different from the first.
2010-12-07 21:28:20 +02:00
Tim-Philipp Müller
df6bd68b80 typefinding: fix ADTS caps stream-format detail
Field should be "stream-format", not "stream-type".
2010-10-14 16:46:44 +01:00
Andrzej K. Haczewski
6c5cee1d02 typefinding: extend AAC typefinder to detect LOAS streams
Extend AAC typefinder to recognize LOAS stream as specified by
ISO/IEC 14496-3:2009.

https://bugzilla.gnome.org/show_bug.cgi?id=623918
2010-10-14 16:46:41 +01:00
Arun Raghavan
0cf81938a1 pbutils: add AAC profile detection to codec utils
This moves AAC profile detection to pbutils, and uses this in
typefindfunctions. This will also be used in qtdemux.

https://bugzilla.gnome.org/show_bug.cgi?id=617314

API: gst_codec_utils_aac_get_profile()
API: codec_utils_aac_caps_set_level_and_profile()
2010-09-30 13:09:29 +01:00
Arun Raghavan
c77f88cac6 pbutils: add codec-specific utility functions for AAC
This allows us to add generic codec-specific functionality, like
extracting profile/level data from headers, without having to duplicate
code across demuxers and typefindfunctions.

As a starting point, this moves over AAC level extraction code from
typefindfunctions, so it can be reused in qtdemux, etc.

https://bugzilla.gnome.org/show_bug.cgi?id=617314

API: gst_codec_utils_aac_get_sample_rate_from_index()
API: gst_codec_utils_aac_get_level()
2010-09-30 13:09:28 +01:00
Sebastian Dröge
ff45b44e19 typefindfunctions: Add mp3 to the apetag extensions 2010-09-20 11:14:55 +02:00
Thiago Santos
d123ab7bb1 typefind: Detect avc1 ftyp as video/quicktime
Detects avc1 ftyp as video/quicktime (iso variant)
2010-08-01 06:53:28 -03:00
Arun Raghavan
ae03de8ff8 typefindfunctions: export 3gp profile in caps
This reads the 3gp profile from the major/compatible brands and puts
this as a 'profile' field in caps. This can be used by demuxers to
decide whether they can handle this stream or not. Also needed for
DLNA.

https://bugzilla.gnome.org/show_bug.cgi?id=620291
2010-07-24 10:50:45 +01:00
Parthasarathi Susarla
aad661ec77 typefinding: detect enhanced AC-3
https://bugzilla.gnome.org/show_bug.cgi?id=623846
2010-07-24 09:48:41 +01:00
Tim-Philipp Müller
bd0adb11fd typefinding: make mpeg-ts typefinder scan more data
We only look for packets with payload, but it appears there may be packets without,
which makes it harder to find the N packets with payload in a row that we need in
order to typefind this successfully, so scan some more data than necessary in the
optimistic scenario. Alternatively we could change IS_MPEGTS_HEADER().

Fixes #623663.
2010-07-18 11:37:11 +01:00
Philip Jägenstedt
72ca12e4c1 typefind: only associate .webm with WebM
.weba (audio) and .webv (video) were speculation on my part before
the public launch. As of yet no decision has been made on the
file extension for audio-only WebM, and I'm pretty sure there will
never be one for video-only.

Fixes bug #623837.
2010-07-16 17:40:45 +02:00
Arun Raghavan
026e5d3e67 typefinding: Mark ISO 14496-14 files as video/quicktime
These are currently being marked as audio/x-m4a which is incorrect.

https://bugzilla.gnome.org/show_bug.cgi?id=620720
2010-06-24 14:25:38 +01:00
Edward Hervey
7b2584ed68 typefindfunctions: Fix unitialized variables
yay macosx compilers :(
2010-06-14 14:13:32 +02:00
Tim-Philipp Müller
b5a7e96291 typefinding: look for dts frames at non-zero offsets too
Scan a bit into the data when checking for dts frames instead
of expecting the frame sync to be right at the start of the
data. This is needed for some dts-disguised-as-pcm-in-wav files.

See #413942.
2010-06-11 15:59:54 +01:00
Tim-Philipp Müller
9235c91bec typefinding: add typefinder for dts audio 2010-06-11 15:59:53 +01:00
Tim-Philipp Müller
261a1447fa typefinding: fix log function printf format issue 2010-06-06 16:46:55 +01:00
Tim-Philipp Müller
d4269515fa typefinding: stop jpeg typefinding once we found a SOF marker 2010-06-05 18:25:51 +01:00
Tim-Philipp Müller
95b4de4ed7 typefinding: improve jpeg typefinder
Make jpeg typefinder check more than just the first two bytes
plus Exif or JFIF marker. This allows us to report MAXIMUM
probability in cases where there's no Exif or JFIF marker,
making typefinding stop early. Also extract width and height,
because we can.
2010-06-05 18:06:42 +01:00
Tim-Philipp Müller
14d14a9143 typefinding: fix AC-3 typefinding so that it actually checks for a second frame
Fix typo that made the AC-3 typefinder not actually check for a
second frame, but rather compare the sync point found to itself,
which resulted in the AC-3 typefinder reporting an overly optimistic
MAXIMUM or VERY_LIKELY probability when it found a possible frame
sync.
2010-06-05 17:24:31 +01:00
Sebastian Dröge
760ae91ec3 typefindfunctions: Add IVF typefinder 2010-05-22 08:55:51 +02:00
Philip Jägenstedt
3762cfd3d7 typefind: Detect WebM as video/webm
Refactor matroska_type_find into ebml_check_header and a new
matroska_type_find and webm_type_find.
2010-05-19 19:24:35 +02:00
Tim-Philipp Müller
555a3a5d14 typefinding: add channels and rate to ADTS caps if we can 2010-04-12 15:04:31 +01:00
Arun Raghavan
43a04483d9 typefinding: add AAC level to ADTS caps
This adds code to calculate the level for a given AAC stream and export
it in the stream caps. For AAC LC streams, the level is calculated
according to the definition under the AAC Profile. For other streams,
the definition under the Main Profile is used.

HE-AAC support is still to be done, and is dependent on detecting the
presence of SBR and PS in the stream.

Level is added as a field of type string because that's the way it's
done in H.264 caps as well. There are only a few possible levels, so
not using a numerical type is not too painful in this case, and
consistency is nice.

Fixes #613589.
2010-04-12 15:04:31 +01:00
Arun Raghavan
34dcb8458e typefinding: add AAC profile to ADTS caps
This looks at the AAC profile for ADTS streams and adds the profile as a
string in the corresponding caps.

Profile is the actual profile, base-profile denotes the minimum codec
requirements to decode this stream. In this case they're always the
same, but they may differ e.g. in case of certain HE-AAC streams that
can be partially decoded by LC decoders (with loss of quality of course)
if no suitable HE-AAC decoder is available.

Fixes #612312.
2010-04-12 15:04:23 +01:00
Benjamin Otte
3bd4aa26ff Add -Wwrite-strings to configure
Fixes for the code included
2010-03-16 17:41:51 +01:00
David Hoyt
cfa8de336c typefind: use g_ascii_strncasecmp() instead of strncasecmp()
g_ascii_strncasecmp() is more portable and likely more robust as
well (with random binary data as input).

Fixes #612845.
2010-03-15 18:45:13 +00:00
Kaj-Michael Lang
0230f7ed9e typefind: Handle stm module format
Fixes #609314.
2010-02-15 12:50:45 +00:00
Sebastian Dröge
1ae783dafc typefindfunctions: Add typefinder for ISO MP4 files
Fixes bug #607848.
2010-01-24 20:46:58 +01:00
Tim-Philipp Müller
eef885cf86 typefinding: optimise AC-3 typefinder a bit
Make AC-3 typefinder use the DataScanCtx stuff so we don't have to
do gst_type_find_peek() in the inner loop all the time. Also return
when we've suggested AC3 caps, instead of continuing with the loop.
2010-01-23 15:28:02 +00:00
Tim-Philipp Müller
ca7ba91e5b Revert "typefind: Reduce number of calls to gst_type_find_peek."
This reverts commit c661bfaa99.

This breaks AC-3 typefinding for all cases where the first frame
is at an offset > 0.
2010-01-23 15:27:49 +00:00
Stefan Kost
8ebb6be803 typefind: include stdio.h for sscanf 2010-01-22 16:15:54 +02:00
Tim-Philipp Müller
2a84cf0941 typefinding: add PNM typefinder
Add PNM typefinder, so we can remove the one that's in the PNM plugin
in -bad (which btw uses different/wrong media types that don't match
the ones used by gdkpixbufdec) and people don't make fun of us for
loading image decoders when typefinding and playing back audio files.
2010-01-22 02:09:58 +00:00
David Schleef
e432c8ebc2 typefind: rewrite h.264 detection
Make detection simpler: check for NALs, check that they make
sense, and report how certain we are that it's a raw H.264 stream.
Fixes: #583376.
2010-01-19 13:37:12 -08:00
Wim Taymans
8d30d92740 typefind: mp4 video is not parsed 2010-01-13 17:36:05 +01:00
Thiago Santos
148d951fbc typefind: Add aac stream-format to caps
Also add the aac stream-format field on the caps when
detecting it.
2010-01-13 12:49:20 -03:00
Edward Hervey
c661bfaa99 typefind: Reduce number of calls to gst_type_find_peek.
Shaves off a couple percents off typefinding
2009-11-09 19:18:07 +01:00
Tim-Philipp Müller
37f8957181 typefind: fix typo in previous mxf typefinder change 2009-10-21 20:36:23 +01:00
Edward Hervey
d48d47e683 typefind: speed up mxf_type_find over 300 times for worst case scenarios
* memcmp is expensive and was being abused, reduce calling it by checking
  the first byte.
* iterating one byte at at time over 64 kbites introduces a certain overhead,
  therefore we now do it in chunks of 1024 bytes

And I do mean over 300 times. The average instruction call per mxf_type_find
was previously 785685 and it's now down to 2458 :)
2009-10-21 21:04:45 +02:00
David Schleef
1871a6025d typefind: detect 'ftypqt ' as video/quicktime 2009-10-06 12:19:12 -07:00
Tim-Philipp Müller
f051514f69 typefinding: disable typefinder for headerless flac
Disable headerless flac typefinder as long as it happily typefinds anything
including /dev/urandom as flac and as long as it's not particularly useful
given that such streams don't really exist in the wild.

Also fix up some comments so that gtk-doc doesn't complain about them.
2009-09-07 17:13:12 +01:00
Wim Taymans
f1b209f409 typefind: fix midi typefinding
We already have a audio/midi typefinder so don't override it with the midi in
RIFF typefinder or else we fail to detect plain midi files.
2009-09-04 15:48:06 +02:00
Sebastian Dröge
a69ffb5886 typefindfunctions: Add typefinder for Midi inside RIFF
This is a standard Midi file format that should be supported by
all Midi decoders and also has the mimetype audio/mid according to
the Midi specification homepage.

Fixes bug #594094.
2009-09-04 07:36:10 +02:00