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Commit Graph

18 Commits

Author SHA1 Message Date
Michael Niedermayer
b0554fec04 Merge commit 'c0329748b04e1f175dad8c9c2ebf22a5e2dc5b72'
* commit 'c0329748b04e1f175dad8c9c2ebf22a5e2dc5b72':
  fate: add a dependency helper macro
  Add support for building shared libraries with MSVC
  avcodec: Rename avpriv_frame_rate_tab to ff_mpeg12_frame_rate_tab
  gxf: Add a local copy of the relevant parts of the frame rate table
  configure: Split out msvc as a separate target OS
  aviobuf: Remove a senseless ifdef in avio_seek

Conflicts:
	configure
	libavcodec/dirac.c
	libavcodec/mpeg12data.h
	libavcodec/mpeg12enc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-10-19 13:29:24 +02:00
Martin Storsjö
d66c52c2b3 Add support for building shared libraries with MSVC
This requires the makedef perl script by Derek, from the
c89-to-c99 repo. That scripts produces a .def file, listing
the symbols to be exported, based on the gcc version scripts
and the built object files.

To properly load non-function symbols from DLL files, the
data symbol declarations need to have the attribute
__declspec(dllimport) when building the calling code. (On mingw,
the linker can fix this up automatically, which is why it has not
been an issue so far. If this attribute is omitted, linking
actually succeeds, but reads from the table will not produce the
desired results at runtime.)

MSVC seems to manage to link DLLs (and run properly) even if
this attribute is present while building the library itself
(which normally isn't recommended) - other object files in the
same library manage to link to the symbol (with a small warning
at link time, like "warning LNK4049: locally defined symbol
_avpriv_mpa_bitrate_tab imported" - it doesn't seem to be possible
to squelch this warning), and the definition of the tables
themselves produce a warning that can be squelched ("warning C4273:
'avpriv_mpa_bitrate_tab' : inconsistent dll linkage, see previous
definition of 'avpriv_mpa_bitrate_tab').

In this setup, mingw isn't able to link object files that refer to
data symbols with __declspec(dllimport) without those symbols
actually being linked via a DLL (linking avcodec.dll ends up with
errors like "undefined reference to `__imp__avpriv_mpa_freq_tab'").
The dllimport declspec isn't needed at all in mingw, so we simply
choose not to declare it for other compilers than MSVC that requires
it. (If ICL support later requires it, the condition can be extended
later to include both of them.)

This also implies that code that is built to link to a certain
library as a DLL can't link to the same library as a static library.
Therefore, we only allow building either static or shared but not
both at the same time. (That is, static libraries as such can be,
and actually are, built - this is used for linking the test tools to
internal symbols in the libraries - but e.g. libavformat built to
link to libavcodec as a DLL cannot link statically to libavcodec.)

Also, linking to DLLs is slightly different from linking to shared
libraries on other platforms. DLLs use a thing called import
libraries, which is basically a stub library allowing the linker
to know which symbols exist in the DLL and what name the DLL will
have at runtime.

In mingw/gcc, the import library is usually named libfoo.dll.a,
which goes next to a static library named libfoo.a. This allows
gcc to pick the dynamic one, if available, from the normal -lfoo
switches, just as it does for libfoo.a vs libfoo.so on Unix. On
MSVC however, you need to literally specify the name of the import
library instead of the static library.

Signed-off-by: Martin Storsjö <martin@martin.st>
2012-10-18 14:26:15 +03:00
Michael Niedermayer
15a0fb58a3 Merge remote-tracking branch 'qatar/master'
* qatar/master:
  utvideodec: Fix single symbol mode decoding
  truespeech: drop useless casts
  libavcodec: drop bogus dependencies from mpc[78] and qdm2
  mpegaudio: move ff_mpa_enwindow to a separate file
  AVOptions: store defaults for INT64 options in int64 union member.

Conflicts:
	libavcodec/Makefile
	libavfilter/af_asyncts.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-08-24 15:00:39 +02:00
Mans Rullgard
2e2b8ef8e0 mpegaudio: move ff_mpa_enwindow to a separate file
This table is used only by mpegaudiodsp and mpegaudioenc.  Separating
it allows dropping some dependencies from mpc[78] and qdm2.

Signed-off-by: Mans Rullgard <mans@mansr.com>
2012-08-24 10:45:39 +01:00
Michael Niedermayer
dd8ffc1925 Merge remote-tracking branch 'qatar/master'
* qatar/master: (47 commits)
  lavc: hide private symbols.
  lavc: deprecate img_get_alpha_info().
  lavc: use avpriv_ prefix for ff_toupper4.
  lavc: use avpriv_ prefix for ff_copy_bits and align_put_bits.
  lavc: use avpriv_ prefix for ff_ac3_parse_header.
  lavc: use avpriv_ prefix for ff_frame_rate_tab.
  lavc: rename ff_find_start_code to avpriv_mpv_find_start_code
  lavc: use avpriv_ prefix for ff_split_xiph_headers.
  lavc: use avpriv_ prefix for ff_dirac_parse_sequence_header.
  lavc: use avpriv_ prefix for some dv symbols used in lavf.
  lavc: use avpriv_ prefix for some flac symbols used in lavf.
  lavc: use avpriv_ prefix for some mpeg4audio symbols used in lavf.
  lavc: use avpriv_ prefix for some mpegaudio symbols used in lavf.
  lavc: use avpriv_ prefix for ff_aac_parse_header().
  lavf: hide private symbols.
  lavf: use avpriv_ prefix for some dv functions.
  lavf: use avpriv_ prefix for ff_new_chapter().
  avcodec: add CODEC_CAP_DELAY note to avcodec_decode_audio3() documentation
  avcodec: clarify the CODEC_CAP_DELAY note in avcodec_decode_video2()
  avcodec: clarify documentation of CODEC_CAP_DELAY
  ...

Conflicts:
	configure
	doc/general.texi
	libavcodec/Makefile
	libavcodec/aacdec.c
	libavcodec/allcodecs.c
	libavcodec/avcodec.h
	libavcodec/dv.c
	libavcodec/dvdata.c
	libavcodec/dvdata.h
	libavcodec/libspeexenc.c
	libavcodec/mpegvideo.c
	libavcodec/version.h
	libavformat/avidec.c
	libavformat/dv.c
	libavformat/dv.h
	libavformat/flvenc.c
	libavformat/mov.c
	libavformat/mp3enc.c
	libavformat/oggparsespeex.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2011-10-21 02:01:26 +02:00
Anton Khirnov
82ab61f901 lavc: use avpriv_ prefix for some mpegaudio symbols used in lavf.
Specifically, ff_mpa_freq_tab, ff_mpa_bitrate_tab, ff_mpa_decode_header,
ff_mpegaudio_decode_header.
2011-10-20 21:06:57 +02:00
Michael Niedermayer
6d32bcd770 Merge remote-tracking branch 'qatar/master'
* qatar/master:
  configure: make executable again
  LATM/AAC: Free previously initialized context on reinit.
  configure: Do not unconditionally add -Wall to host CFLAGS.
  configure: Set OS/2 objformat to a.out.
  Add support for a.out object format to assembler macros.
  fate: disable threading for encoding
  fate: add comment field
  fate: allow overriding default build and install dirs
  mpegtsenc: Add an AVClass pointer to the private data
  mpegaudio: clean up #includes
  mpegaudio: move all header parsing to mpegaudiodecheader.[ch]

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2011-05-21 05:32:03 +02:00
Mans Rullgard
f255a28d14 mpegaudio: clean up #includes
Signed-off-by: Mans Rullgard <mans@mansr.com>
2011-05-20 11:05:19 +01:00
Mans Rullgard
2912e87a6c Replace FFmpeg with Libav in licence headers
Signed-off-by: Mans Rullgard <mans@mansr.com>
2011-03-19 13:33:20 +00:00
Diego Biurrun
ba87f0801d Remove explicit filename from Doxygen @file commands.
Passing an explicit filename to this command is only necessary if the
documentation in the @file block refers to a file different from the
one the block resides in.

Originally committed as revision 22921 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-04-20 14:45:34 +00:00
Diego Biurrun
bad5537e2c Use full internal pathname in doxygen @file directives.
Otherwise doxygen complains about ambiguous filenames when files exist
under the same name in different subdirectories.

Originally committed as revision 16912 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-02-01 02:00:19 +00:00
Stefano Sabatini
987903826b Globally rename the header inclusion guard names.
Consistently apply this rule: the guard name is obtained from the
filename by stripping the leading "lib", converting '/' and '.'  to
'_' and uppercasing the resulting name. Guard names in the root
directory have to be prefixed by "FFMPEG_".

Originally committed as revision 15120 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-31 07:39:47 +00:00
Stefan Gehrer
cf2baeb338 mark read-only data as const
Originally committed as revision 13947 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-06-24 20:01:31 +00:00
Diego Biurrun
245976da2a Use full path for #includes from another directory.
Originally committed as revision 13098 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-05-09 11:56:36 +00:00
Martin Lindhe
3240941b25 Move 2 defines from mpegaudiodec.c to mpegaudiodata.h to allow compilation
when DEBUG is defined.
Patch by Martin Lindhe: martin startwars org

Originally committed as revision 10955 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-11-08 10:53:32 +00:00
Diego Biurrun
5b21bdabe4 Add FFMPEG_ prefix to all multiple inclusion guards.
Originally committed as revision 10765 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-10-17 09:37:46 +00:00
Aurelien Jacobs
677fe2e226 add proper prefix to extern mpeg audio data tables
Originally committed as revision 9061 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-05-19 00:13:35 +00:00
Aurelien Jacobs
4991c0516d move some common mpeg audio tables from mpegaudiodectab.h to mpegaudiodata.c
Originally committed as revision 9060 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-05-19 00:06:02 +00:00