h264: deMpegEncContextize

Most of the changes are just trivial are just trivial replacements of
fields from MpegEncContext with equivalent fields in H264Context.
Everything in h264* other than h264.c are those trivial changes.

The nontrivial parts are:
1) extracting a simplified version of the frame management code from
   mpegvideo.c. We don't need last/next_picture anymore, since h264 uses
   its own more complex system already and those were set only to appease
   the mpegvideo parts.
2) some tables that need to be allocated/freed in appropriate places.
3) hwaccels -- mostly trivial replacements.
   for dxva, the draw_horiz_band() call is moved from
   ff_dxva2_common_end_frame() to per-codec end_frame() callbacks,
   because it's now different for h264 and MpegEncContext-based
   decoders.
4) svq3 -- it does not use h264 complex reference system, so I just
   added some very simplistic frame management instead and dropped the
   use of ff_h264_frame_start(). Because of this I also had to move some
   initialization code to svq3.

Additional fixes for chroma format and bit depth changes by
Janne Grunau <janne-libav@jannau.net>

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

1 files changed, 0 insertions, 2 deletions

diff --git a/libavcodec/h264pred.c b/libavcodec/h264pred.c
index 94cf9d0..48a4a79 100644
--- a/libavcodec/h264pred.c
+++ b/libavcodec/h264pred.c
@@ -399,8 +399,6 @@ static void pred8x8_tm_vp8_c(uint8_t *src, ptrdiff_t stride)
 void ff_h264_pred_init(H264PredContext *h, int codec_id, const int bit_depth,
                        const int chroma_format_idc)
 {
-//    MpegEncContext * const s = &h->s;
-
 #undef FUNC
 #undef FUNCC
 #define FUNC(a, depth) a ## _ ## depth