The rules from ffmpeg-0.5.1 debian package have been adapted for building ffmpeg-mt.

Problematic code path:
1. sps_buffers[0] is allocated in the first thread's codec context when the
decoder is opened.
2. The first thread context is memcpy'd to the other threads by frame_thread_init().
3. The first thread is closed and its sps_buffers[0] is freed.
4. The third thread is closed.
Because it never got to decode a frame, update_thread_context was never called,
and sps_buffers[0] still contained the first thread's pointer.

Fixed by not trying to free sps/pps buffers if the thread wasn't initialized.
I didn't properly consider this when designing it but this seems to be the
best approach anyway.

Fixes still2.mp4 crash from Chromium

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23671 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23670 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23669 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

Patch by Nick Brereton, nick nbrereton net 


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23668 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23667 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23666 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

connection (e.g. a seek). This fixes the theoretical case where a server
sends a file first using chunked encoding, and then using non-chunked
encoding.



git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23665 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

them from being sent using chunked encoding (I don't think this ever happened,
but either way it would be wrong).



git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23664 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23663 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23662 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

It is already rejected by the "source >= 0 && source != ps->num_env" 0 envelope
case and is perfectly legally for the suppressed final envelope case.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23661 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23660 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23659 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23658 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

leading cross_prefix in it. Fixes cross-compilation for darwin.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23657 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

r23646.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23656 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

E-AC-3 (61937-3 Edition 2) and TrueHD (61937-9).


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23655 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

Document ONLY_IF_THREADS_ENABLED along the way.

Conflicts:
	libavutil/internal.h

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23654 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23653 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23652 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23651 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23650 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

This fixes a potential issue when doing redirects.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23649 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

This removes some useless copying of handles, and simplifies error handling.

Patch by Josh Allmann, joshua dot allmann at gmail


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23648 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23647 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

function pointer. Should allow for ASM optimizations.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23646 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

Fixes issue2015


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23645 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

 It allows VLD MPEG-2 decoding using DXVA2 (GPU assisted decoding API under
VISTA and Windows 7).
 It is implemented by using AVHWAccel API.



git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23644 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

Since rtsp_hd isn't assigned to rt->rtsp_hd until after the setup phase,
the initialized URLContext could be leaked on failures.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23643 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

Earlier, the function only returned when the enough data to fill the
requested buffer was available. This lead to high latency when receiving
low-bandwidth streams.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23642 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

Data-burst is described in IEC 61937-7 (Atrac) and IEC 61937-8 (WMA Pro).


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23641 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b