Signed-off-by: Diego Biurrun <diego@biurrun.de>

Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.

In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.

There are multiple important problems with this approach:
    - the fields in AVCodecContext are in general one of
        * stream parameters
        * codec options
        * codec state
      However, it's not clear which ones are which. It is consequently
      unclear which fields are a demuxer allowed to set or a muxer allowed to
      read. This leads to erratic behaviour depending on whether decoding or
      encoding is being performed or not (and whether it uses the AVStream
      embedded codec context).
    - various synchronization issues arising from the fact that the same
      context is used by several different APIs (muxers/demuxers,
      parsers, bitstream filters and encoders/decoders) simultaneously, with
      there being no clear rules for who can modify what and the different
      processes being typically delayed with respect to each other.
    - avformat_find_stream_info() making it necessary to support opening
      and closing a single codec context multiple times, thus
      complicating the semantics of freeing various allocated objects in the
      codec context.

Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.

This is necessary to avoid target config settings bleeding into the host
compilation process with hardcoded tables and the DV VLC tables no longer
present as static tables in a header file.

Since 596e5d4783, this is not necessary anymore. It also allows to
actually disable the flushing, improving write performance (but
possibly giving worse latency in real-time streaming).

Signed-off-by: Martin Storsjö <martin@martin.st>

Prefix the functions/tables brktimegm, pcm_read_seek,
dv_offset_reset, voc_get_packet, codec_movaudio_tags,
codec_movvideo_tags.

After this, lavf has no global symbols without the proper prefix.

Signed-off-by: Martin Storsjö <martin@martin.st>

Specifically, ff_dv_frame_profile and ff_dv_codec_profile.

The new function provides a more generic interface than av_fifo_peek()
for peeking at a FIFO buffer data.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

It's more readable and less prone to breakage.

It's replaced by 'creation_time' metadata tag.

Signed-off-by: Mans Rullgard <mans@mansr.com>

Signed-off-by: Mans Rullgard <mans@mansr.com>

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

In the name of consistency:
put_byte           -> avio_w8
put_<type>         -> avio_w<type>
put_buffer         -> avio_write

put_nbyte will be made private
put_tag will be merged with avio_put_str

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

This also lists the objects from those two libraries as internal (by adding
the ff_ prefix) so that they can then be hidden via linker scripts.

Also drop some CONFIG_DV_MUXER #ifdefs probably vestigial from before the
split of dvenc and dvdec.

Signed-off-by: Mans Rullgard <mans@mansr.com>

libavformat/dvenc.c:82: warning: implicit declaration of function ‘brktimegm’

Originally committed as revision 22920 to svn://svn.ffmpeg.org/ffmpeg/trunk

is deprecated and will be dropped at the next major bump.

Originally committed as revision 22735 to svn://svn.ffmpeg.org/ffmpeg/trunk

work_chunks_* and dv_idct_factor_* variables appear only once in the binary
instead of 3 times.
Saves 3264 bytes in .rodata and 312416 bytes in .bss on x86_64.

Originally committed as revision 20246 to svn://svn.ffmpeg.org/ffmpeg/trunk

Yes this breaks ABI/API but ive already broken it and will bump avutil major
soon.

Originally committed as revision 17869 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 16684 to svn://svn.ffmpeg.org/ffmpeg/trunk

They are now always defined to either 0 or 1.

Originally committed as revision 16590 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/dvenc.c:256: warning: passing argument 2 of ‘av_fifo_generic_write’ discards qualifiers from pointer target type

Originally committed as revision 16460 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 15682 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 15681 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 15584 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 15518 to svn://svn.ffmpeg.org/ffmpeg/trunk

CONFIG_FOO_MUXER conditionals where appropriate.

Originally committed as revision 15158 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14372 to svn://svn.ffmpeg.org/ffmpeg/trunk

patch by Stefano Sabatini, stefano.sabatini-lala poste.it
along with some spelling/consistency fixes for the long names by me

Originally committed as revision 13649 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 13511 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 13098 to svn://svn.ffmpeg.org/ffmpeg/trunk

patch by: Björn Axelsson, bjorn d axelsson a intinor d se
thread: [PATCH] Remove static ByteIOContexts, 06 nov 2007

Originally committed as revision 11071 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 9404 to svn://svn.ffmpeg.org/ffmpeg/trunk

but also if two of them are video or all three are audio.

Originally committed as revision 9403 to svn://svn.ffmpeg.org/ffmpeg/trunk

left to make another DV frame.

Originally committed as revision 9032 to svn://svn.ffmpeg.org/ffmpeg/trunk

patch by Nicholas Tung, ntung ntung com

Originally committed as revision 8687 to svn://svn.ffmpeg.org/ffmpeg/trunk

* Making DV codec release a buffer on exit
   * Flagging accepted pix_fmts for DV encoder

Originally committed as revision 7531 to svn://svn.ffmpeg.org/ffmpeg/trunk

Patch by Brian Brice bbrice at newtek dot com

Originally committed as revision 6945 to svn://svn.ffmpeg.org/ffmpeg/trunk

* Fixing a bug in how SPEED was encoded for AAUX ASC

Originally committed as revision 6716 to svn://svn.ffmpeg.org/ffmpeg/trunk