FFmpeg

Commit Graph

Author	SHA1	Message	Date
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>	12 years ago
Diego Biurrun	e4cbf7529b	Give all anonymously typedeffed structs in headers a name Anonymous structs cannot be forward declared and have no benefit.	13 years ago
Janne Grunau	fd095539d1	latmdec: fix audio specific config parsing Pass the correct size in bits to mpeg4audio_get_config and add a flag to disable parsing of the sync extension when the size is not known. Latm with AudioMuxVersion 0 does not specify the size of the audio specific config. Data after the audio specific config can be misinterpreted as sync extension resulting in random and wrong configs.	13 years ago
Anton Khirnov	59a9a23581	lavc: use avpriv_ prefix for some mpeg4audio symbols used in lavf. Specifically, ff_mpeg4audio_sample_rates, ff_mpeg4audio_get_config and ff_copy_pce_data	13 years ago
Diego Biurrun	0249478756	doxygen: fix wrong comment syntax, //< vs. ///<	14 years ago
Mans Rullgard	2912e87a6c	Replace FFmpeg with Libav in licence headers Signed-off-by: Mans Rullgard <mans@mansr.com>	14 years ago
Young Han Lee	ead15f1dc1	aacdec: Implement LTP support. Ported from gsoc svn.	14 years ago
Alex Converse	d14662f66a	Add support for PS sync extensions. Originally committed as revision 22818 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	ed492b61db	Add an HE-AAC v1 decoder. A large portion of this code was orignally authored by Robert Swain. The rest was written by me. Full history is available at: svn://svn.ffmpeg.org/soc/aac-sbr http://github.com/aconverse/ffmpeg-heaac/tree/sbr_pub Originally committed as revision 22316 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	07580347b9	Mark AOT_ALS as a supported MPEG-4 audio object type. Originally committed as revision 20524 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	e92ad83f54	Cosmetics: Remove the implied gap before AOT_USAC in the MPEG-4 AOT enum. Originally committed as revision 20514 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	5aea268d14	Add a channels field to MPEG4AudioConfig. Originally committed as revision 20512 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	4312b9367a	Add Low Delay MPEG Surround to the enum of MPEG-4 Audio Object Types. Originally committed as revision 20510 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Alex Converse	8ba939d702	Mark the AOT escape value as supported. Originally committed as revision 19662 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Alex Converse	08dac48d61	Add USAC and SAOC AOTs to the AudioObjectType enum. Originally committed as revision 19661 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Alex Converse	107815de42	Subroutine to copy an AAC Program Config Element (PCE) Originally committed as revision 18817 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Jai Menon	3d10a8904d	Read extended channel configuration when extended AOT is BSAC. Originally committed as revision 18644 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Alex Converse	2b823a5299	Fix typo in AOT_ER_AAC_ELD Originally committed as revision 18034 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Alex Converse	d3487e472e	Update the MPEG-4 AOT table. Originally committed as revision 18033 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Alex Converse	f650e4d34a	Move MPEG-4 AOT enum to mpeg4audio.h. Originally committed as revision 18031 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
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	17 years ago
Baptiste Coudurier	4d34bb19c1	mpeg4audio common code Originally committed as revision 12662 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago

22 Commits (926e9d28f1a85898545706a26b27c24672c9c716)