avcodec/thread: Don't use ThreadFrame when unnecessary

The majority of frame-threaded decoders (mainly the intra-only)
need exactly one part of ThreadFrame: The AVFrame. They don't
need the owners nor the progress, yet they had to use it because
ff_thread_(get|release)_buffer() requires it.

This commit changes this and makes these functions work with ordinary
AVFrames; the decoders that need the extra fields for progress
use ff_thread_(get|release)_ext_buffer() which work exactly
as ff_thread_(get|release)_buffer() used to do.

This also avoids some unnecessary allocations of progress AVBuffers,
namely for H.264 and HEVC film grain frames: These frames are not
used for synchronization and therefore don't need a ThreadFrame.

Also move the ThreadFrame structure as well as ff_thread_ref_frame()
to threadframe.h, the header for frame-threaded decoders with
inter-frame dependencies.

Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/libavcodec/hevc_refs.c b/libavcodec/hevc_refs.c
index 581dd3acc2..35b8e5e696 100644
--- a/libavcodec/hevc_refs.c
+++ b/libavcodec/hevc_refs.c
@@ -37,7 +37,7 @@ void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags)
     frame->flags &= ~flags;
     if (!frame->flags) {
         ff_thread_release_ext_buffer(s->avctx, &frame->tf);
-        ff_thread_release_buffer(s->avctx, &frame->tf_grain);
+        ff_thread_release_buffer(s->avctx, frame->frame_grain);
         frame->needs_fg = 0;
 
         av_buffer_unref(&frame->tab_mvf_buf);