avcodec/vp9: Add hwaccel hooks for VP9

Author: philipl

libavcodec/vp9.c

@@ -76,6 +76,9 @@ typedef struct VP9Frame {
     uint8_t *segmentation_map;
     struct VP9mvrefPair *mv;
     int uses_2pass;
+
+    AVBufferRef *hwaccel_priv_buf;
+    void *hwaccel_picture_private;
 } VP9Frame;
 
 struct VP9Filter {
@@ -265,6 +268,15 @@ static const uint8_t bwh_tab[2][N_BS_SIZES][2] = {
     }
 };
 
+static void vp9_unref_frame(AVCodecContext *ctx, VP9Frame *f)
+{
+    ff_thread_release_buffer(ctx, &f->tf);
+    av_buffer_unref(&f->extradata);
+    av_buffer_unref(&f->hwaccel_priv_buf);
+    f->segmentation_map = NULL;
+    f->hwaccel_picture_private = NULL;
+}
+
 static int vp9_alloc_frame(AVCodecContext *ctx, VP9Frame *f)
 {
     VP9Context *s = ctx->priv_data;
@@ -274,21 +286,27 @@ static int vp9_alloc_frame(AVCodecContext *ctx, VP9Frame *f)
         return ret;
     sz = 64 * s->sb_cols * s->sb_rows;
     if (!(f->extradata = av_buffer_allocz(sz * (1 + sizeof(struct VP9mvrefPair))))) {
-        ff_thread_release_buffer(ctx, &f->tf);
-        return AVERROR(ENOMEM);
+        goto fail;
     }
 
     f->segmentation_map = f->extradata->data;
     f->mv = (struct VP9mvrefPair *) (f->extradata->data + sz);
 
-    return 0;
-}
+    if (ctx->hwaccel) {
+        const AVHWAccel *hwaccel = ctx->hwaccel;
+        av_assert0(!f->hwaccel_picture_private);
+        if (hwaccel->frame_priv_data_size) {
+            f->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
+            if (!f->hwaccel_priv_buf)
+                goto fail;
+            f->hwaccel_picture_private = f->hwaccel_priv_buf->data;
+        }
+    }
 
-static void vp9_unref_frame(AVCodecContext *ctx, VP9Frame *f)
-{
-    ff_thread_release_buffer(ctx, &f->tf);
-    av_buffer_unref(&f->extradata);
-    f->segmentation_map = NULL;
+    return 0;
+fail:
+    vp9_unref_frame(ctx, f);
+    return AVERROR(ENOMEM);
 }
 
 static int vp9_ref_frame(AVCodecContext *ctx, VP9Frame *dst, VP9Frame *src)
@@ -298,15 +316,24 @@ static int vp9_ref_frame(AVCodecContext *ctx, VP9Frame *dst, VP9Frame *src)
     if ((res = ff_thread_ref_frame(&dst->tf, &src->tf)) < 0) {
         return res;
     } else if (!(dst->extradata = av_buffer_ref(src->extradata))) {
-        vp9_unref_frame(ctx, dst);
-        return AVERROR(ENOMEM);
+        goto fail;
     }
 
     dst->segmentation_map = src->segmentation_map;
     dst->mv = src->mv;
     dst->uses_2pass = src->uses_2pass;
 
+    if (src->hwaccel_picture_private) {
+        dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf);
+        if (!dst->hwaccel_priv_buf)
+            goto fail;
+        dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data;
+    }
+
     return 0;
+fail:
+    vp9_unref_frame(ctx, dst);
+    return AVERROR(ENOMEM);
 }
 
 static int update_size(AVCodecContext *ctx, int w, int h, enum AVPixelFormat fmt)
@@ -4072,6 +4099,19 @@ static int vp9_decode_frame(AVCodecContext *ctx, void *frame,
             return res;
     }
 
+    if (ctx->hwaccel) {
+        res = ctx->hwaccel->start_frame(ctx, NULL, 0);
+        if (res < 0)
+            return res;
+        res = ctx->hwaccel->decode_slice(ctx, data, size);
+        if (res < 0)
+            return res;
+        res = ctx->hwaccel->end_frame(ctx);
+        if (res < 0)
+            return res;
+        goto finish;
+    }
+
     // main tile decode loop
     bytesperpixel = s->bytesperpixel;
     memset(s->above_partition_ctx, 0, s->cols);
@@ -4241,6 +4281,7 @@ static int vp9_decode_frame(AVCodecContext *ctx, void *frame,
     } while (s->pass++ == 1);
     ff_thread_report_progress(&s->frames[CUR_FRAME].tf, INT_MAX, 0);
 
+finish:
     // ref frame setup
     for (i = 0; i < 8; i++) {
         if (s->refs[i].f->data[0])