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Code Issues Releases Activity

avcodec/libdav1d: fine tune thread distribution

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As suggested by Ronald, don't map auto threads to frame threads only, and
instead distribute them between frame and tile more efficiently.
Add a new framethreads override option, similar to the tilethreads one.

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2019-05-12 23:29:36 -03:00
parent b401a4ab8a
commit fbc5a27694
2 changed files with 14 additions and 4 deletions
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16
libavcodec/libdav1d.c
View File

@ -38,6 +38,7 @@ typedef struct Libdav1dContext {
Dav1dData data;
int tile_threads;
int frame_threads;
int apply_grain;
} Libdav1dContext;
@ -114,6 +115,7 @@ static av_cold int libdav1d_init(AVCodecContext *c)
{
Libdav1dContext *dav1d = c->priv_data;
Dav1dSettings s;
int threads = (c->thread_count ? c->thread_count : av_cpu_count()) * 3 / 2;
int res;
av_log(c, AV_LOG_INFO, "libdav1d %s\n", dav1d_version());
@ -124,9 +126,16 @@ static av_cold int libdav1d_init(AVCodecContext *c)
s.allocator.cookie = dav1d;
s.allocator.alloc_picture_callback = libdav1d_picture_allocator;
s.allocator.release_picture_callback = libdav1d_picture_release;
s.n_tile_threads = dav1d->tile_threads;
s.apply_grain = dav1d->apply_grain;
s.n_frame_threads = FFMIN(c->thread_count ? c->thread_count : av_cpu_count(), DAV1D_MAX_FRAME_THREADS);
s.n_tile_threads = dav1d->tile_threads
? dav1d->tile_threads
: FFMIN(floor(sqrt(threads)), DAV1D_MAX_TILE_THREADS);
s.n_frame_threads = dav1d->frame_threads
? dav1d->frame_threads
: FFMIN(ceil(threads / s.n_tile_threads), DAV1D_MAX_FRAME_THREADS);
av_log(c, AV_LOG_DEBUG, "Using %d frame threads, %d tile threads\n",
s.n_frame_threads, s.n_tile_threads);
res = dav1d_open(&dav1d->c, &s);
if (res < 0)
@ -317,7 +326,8 @@ static av_cold int libdav1d_close(AVCodecContext *c)
#define OFFSET(x) offsetof(Libdav1dContext, x)
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
static const AVOption libdav1d_options[] = {
{ "tilethreads", "Tile threads", OFFSET(tile_threads), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, DAV1D_MAX_TILE_THREADS, VD },
{ "tilethreads", "Tile threads", OFFSET(tile_threads), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, DAV1D_MAX_TILE_THREADS, VD },
{ "framethreads", "Frame threads", OFFSET(frame_threads), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, DAV1D_MAX_FRAME_THREADS, VD },
{ "filmgrain", "Apply Film Grain", OFFSET(apply_grain), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VD },
{ NULL }
};

2
libavcodec/version.h
View File

@ -29,7 +29,7 @@
#define LIBAVCODEC_VERSION_MAJOR 58
#define LIBAVCODEC_VERSION_MINOR 52
#define LIBAVCODEC_VERSION_MICRO 101
#define LIBAVCODEC_VERSION_MICRO 102
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \