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, 2 deletions

diff --git a/libavcodec/v210dec.c b/libavcodec/v210dec.c
index 0c95728781..19dd4eeeec 100644
--- a/libavcodec/v210dec.c
+++ b/libavcodec/v210dec.c
@@ -142,7 +142,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     V210DecContext *s = avctx->priv_data;
     ThreadData td;
     int ret, stride, aligned_input;
-    ThreadFrame frame = { .f = data };
     AVFrame *pic = data;
     const uint8_t *psrc = avpkt->data;
 
@@ -177,7 +176,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
         ff_v210dec_init(s);
     }
 
-    if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
+    if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
         return ret;
 
     pic->pict_type = AV_PICTURE_TYPE_I;