Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 802 insertions, 0 deletions

diff --git a/third_party/dav1d/src/lib.c b/third_party/dav1d/src/lib.c
new file mode 100644
index 0000000000..eca22ebe03
--- /dev/null
+++ b/third_party/dav1d/src/lib.c
@@ -0,0 +1,802 @@
+/*
+ * Copyright © 2018, VideoLAN and dav1d authors
+ * Copyright © 2018, Two Orioles, LLC
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "vcs_version.h"
+
+#include <errno.h>
+#include <string.h>
+
+#if defined(__linux__) && defined(HAVE_DLSYM)
+#include <dlfcn.h>
+#endif
+
+#include "dav1d/dav1d.h"
+#include "dav1d/data.h"
+
+#include "common/validate.h"
+
+#include "src/cpu.h"
+#include "src/fg_apply.h"
+#include "src/internal.h"
+#include "src/log.h"
+#include "src/obu.h"
+#include "src/qm.h"
+#include "src/ref.h"
+#include "src/thread_task.h"
+#include "src/wedge.h"
+
+static COLD void init_internal(void) {
+    dav1d_init_cpu();
+    dav1d_init_interintra_masks();
+    dav1d_init_qm_tables();
+    dav1d_init_thread();
+    dav1d_init_wedge_masks();
+}
+
+COLD const char *dav1d_version(void) {
+    return DAV1D_VERSION;
+}
+
+COLD void dav1d_default_settings(Dav1dSettings *const s) {
+    s->n_threads = 0;
+    s->max_frame_delay = 0;
+    s->apply_grain = 1;
+    s->allocator.cookie = NULL;
+    s->allocator.alloc_picture_callback = dav1d_default_picture_alloc;
+    s->allocator.release_picture_callback = dav1d_default_picture_release;
+    s->logger.cookie = NULL;
+    s->logger.callback = dav1d_log_default_callback;
+    s->operating_point = 0;
+    s->all_layers = 1; // just until the tests are adjusted
+    s->frame_size_limit = 0;
+    s->strict_std_compliance = 0;
+    s->output_invisible_frames = 0;
+    s->inloop_filters = DAV1D_INLOOPFILTER_ALL;
+    s->decode_frame_type = DAV1D_DECODEFRAMETYPE_ALL;
+}
+
+static void close_internal(Dav1dContext **const c_out, int flush);
+
+NO_SANITIZE("cfi-icall") // CFI is broken with dlsym()
+static COLD size_t get_stack_size_internal(const pthread_attr_t *const thread_attr) {
+#if defined(__linux__) && defined(HAVE_DLSYM) && defined(__GLIBC__)
+    /* glibc has an issue where the size of the TLS is subtracted from the stack
+     * size instead of allocated separately. As a result the specified stack
+     * size may be insufficient when used in an application with large amounts
+     * of TLS data. The following is a workaround to compensate for that.
+     * See https://sourceware.org/bugzilla/show_bug.cgi?id=11787 */
+    size_t (*const get_minstack)(const pthread_attr_t*) =
+        dlsym(RTLD_DEFAULT, "__pthread_get_minstack");
+    if (get_minstack)
+        return get_minstack(thread_attr) - PTHREAD_STACK_MIN;
+#endif
+    return 0;
+}
+
+static COLD void get_num_threads(Dav1dContext *const c, const Dav1dSettings *const s,
+                                 unsigned *n_tc, unsigned *n_fc)
+{
+    /* ceil(sqrt(n)) */
+    static const uint8_t fc_lut[49] = {
+        1,                                     /*     1 */
+        2, 2, 2,                               /*  2- 4 */
+        3, 3, 3, 3, 3,                         /*  5- 9 */
+        4, 4, 4, 4, 4, 4, 4,                   /* 10-16 */
+        5, 5, 5, 5, 5, 5, 5, 5, 5,             /* 17-25 */
+        6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,       /* 26-36 */
+        7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, /* 37-49 */
+    };
+    *n_tc = s->n_threads ? s->n_threads :
+        iclip(dav1d_num_logical_processors(c), 1, DAV1D_MAX_THREADS);
+    *n_fc = s->max_frame_delay ? umin(s->max_frame_delay, *n_tc) :
+            *n_tc < 50 ? fc_lut[*n_tc - 1] : 8; // min(8, ceil(sqrt(n)))
+}
+
+COLD int dav1d_get_frame_delay(const Dav1dSettings *const s) {
+    unsigned n_tc, n_fc;
+    validate_input_or_ret(s != NULL, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(s->n_threads >= 0 &&
+                          s->n_threads <= DAV1D_MAX_THREADS, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(s->max_frame_delay >= 0 &&
+                          s->max_frame_delay <= DAV1D_MAX_FRAME_DELAY, DAV1D_ERR(EINVAL));
+
+    get_num_threads(NULL, s, &n_tc, &n_fc);
+    return n_fc;
+}
+
+COLD int dav1d_open(Dav1dContext **const c_out, const Dav1dSettings *const s) {
+    static pthread_once_t initted = PTHREAD_ONCE_INIT;
+    pthread_once(&initted, init_internal);
+
+    validate_input_or_ret(c_out != NULL, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(s != NULL, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(s->n_threads >= 0 &&
+                          s->n_threads <= DAV1D_MAX_THREADS, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(s->max_frame_delay >= 0 &&
+                          s->max_frame_delay <= DAV1D_MAX_FRAME_DELAY, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(s->allocator.alloc_picture_callback != NULL,
+                          DAV1D_ERR(EINVAL));
+    validate_input_or_ret(s->allocator.release_picture_callback != NULL,
+                          DAV1D_ERR(EINVAL));
+    validate_input_or_ret(s->operating_point >= 0 &&
+                          s->operating_point <= 31, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(s->decode_frame_type >= DAV1D_DECODEFRAMETYPE_ALL &&
+                          s->decode_frame_type <= DAV1D_DECODEFRAMETYPE_KEY, DAV1D_ERR(EINVAL));
+
+    pthread_attr_t thread_attr;
+    if (pthread_attr_init(&thread_attr)) return DAV1D_ERR(ENOMEM);
+    size_t stack_size = 1024 * 1024 + get_stack_size_internal(&thread_attr);
+
+    pthread_attr_setstacksize(&thread_attr, stack_size);
+
+    Dav1dContext *const c = *c_out = dav1d_alloc_aligned(sizeof(*c), 64);
+    if (!c) goto error;
+    memset(c, 0, sizeof(*c));
+
+    c->allocator = s->allocator;
+    c->logger = s->logger;
+    c->apply_grain = s->apply_grain;
+    c->operating_point = s->operating_point;
+    c->all_layers = s->all_layers;
+    c->frame_size_limit = s->frame_size_limit;
+    c->strict_std_compliance = s->strict_std_compliance;
+    c->output_invisible_frames = s->output_invisible_frames;
+    c->inloop_filters = s->inloop_filters;
+    c->decode_frame_type = s->decode_frame_type;
+
+    dav1d_data_props_set_defaults(&c->cached_error_props);
+
+    if (dav1d_mem_pool_init(&c->seq_hdr_pool) ||
+        dav1d_mem_pool_init(&c->frame_hdr_pool) ||
+        dav1d_mem_pool_init(&c->segmap_pool) ||
+        dav1d_mem_pool_init(&c->refmvs_pool) ||
+        dav1d_mem_pool_init(&c->cdf_pool))
+    {
+        goto error;
+    }
+
+    if (c->allocator.alloc_picture_callback   == dav1d_default_picture_alloc &&
+        c->allocator.release_picture_callback == dav1d_default_picture_release)
+    {
+        if (c->allocator.cookie) goto error;
+        if (dav1d_mem_pool_init(&c->picture_pool)) goto error;
+        c->allocator.cookie = c->picture_pool;
+    } else if (c->allocator.alloc_picture_callback   == dav1d_default_picture_alloc ||
+               c->allocator.release_picture_callback == dav1d_default_picture_release)
+    {
+        goto error;
+    }
+
+    /* On 32-bit systems extremely large frame sizes can cause overflows in
+     * dav1d_decode_frame() malloc size calculations. Prevent that from occuring
+     * by enforcing a maximum frame size limit, chosen to roughly correspond to
+     * the largest size possible to decode without exhausting virtual memory. */
+    if (sizeof(size_t) < 8 && s->frame_size_limit - 1 >= 8192 * 8192) {
+        c->frame_size_limit = 8192 * 8192;
+        if (s->frame_size_limit)
+            dav1d_log(c, "Frame size limit reduced from %u to %u.\n",
+                      s->frame_size_limit, c->frame_size_limit);
+    }
+
+    c->flush = &c->flush_mem;
+    atomic_init(c->flush, 0);
+
+    get_num_threads(c, s, &c->n_tc, &c->n_fc);
+
+    c->fc = dav1d_alloc_aligned(sizeof(*c->fc) * c->n_fc, 32);
+    if (!c->fc) goto error;
+    memset(c->fc, 0, sizeof(*c->fc) * c->n_fc);
+
+    c->tc = dav1d_alloc_aligned(sizeof(*c->tc) * c->n_tc, 64);
+    if (!c->tc) goto error;
+    memset(c->tc, 0, sizeof(*c->tc) * c->n_tc);
+    if (c->n_tc > 1) {
+        if (pthread_mutex_init(&c->task_thread.lock, NULL)) goto error;
+        if (pthread_cond_init(&c->task_thread.cond, NULL)) {
+            pthread_mutex_destroy(&c->task_thread.lock);
+            goto error;
+        }
+        if (pthread_cond_init(&c->task_thread.delayed_fg.cond, NULL)) {
+            pthread_cond_destroy(&c->task_thread.cond);
+            pthread_mutex_destroy(&c->task_thread.lock);
+            goto error;
+        }
+        c->task_thread.cur = c->n_fc;
+        atomic_init(&c->task_thread.reset_task_cur, UINT_MAX);
+        atomic_init(&c->task_thread.cond_signaled, 0);
+        c->task_thread.inited = 1;
+    }
+
+    if (c->n_fc > 1) {
+        c->frame_thread.out_delayed =
+            calloc(c->n_fc, sizeof(*c->frame_thread.out_delayed));
+        if (!c->frame_thread.out_delayed) goto error;
+    }
+    for (unsigned n = 0; n < c->n_fc; n++) {
+        Dav1dFrameContext *const f = &c->fc[n];
+        if (c->n_tc > 1) {
+            if (pthread_mutex_init(&f->task_thread.lock, NULL)) goto error;
+            if (pthread_cond_init(&f->task_thread.cond, NULL)) {
+                pthread_mutex_destroy(&f->task_thread.lock);
+                goto error;
+            }
+            if (pthread_mutex_init(&f->task_thread.pending_tasks.lock, NULL)) {
+                pthread_cond_destroy(&f->task_thread.cond);
+                pthread_mutex_destroy(&f->task_thread.lock);
+                goto error;
+            }
+        }
+        f->c = c;
+        f->task_thread.ttd = &c->task_thread;
+        f->lf.last_sharpness = -1;
+        dav1d_refmvs_init(&f->rf);
+    }
+
+    for (unsigned m = 0; m < c->n_tc; m++) {
+        Dav1dTaskContext *const t = &c->tc[m];
+        t->f = &c->fc[0];
+        t->task_thread.ttd = &c->task_thread;
+        t->c = c;
+        memset(t->cf_16bpc, 0, sizeof(t->cf_16bpc));
+        if (c->n_tc > 1) {
+            if (pthread_mutex_init(&t->task_thread.td.lock, NULL)) goto error;
+            if (pthread_cond_init(&t->task_thread.td.cond, NULL)) {
+                pthread_mutex_destroy(&t->task_thread.td.lock);
+                goto error;
+            }
+            if (pthread_create(&t->task_thread.td.thread, &thread_attr, dav1d_worker_task, t)) {
+                pthread_cond_destroy(&t->task_thread.td.cond);
+                pthread_mutex_destroy(&t->task_thread.td.lock);
+                goto error;
+            }
+            t->task_thread.td.inited = 1;
+        }
+    }
+    dav1d_refmvs_dsp_init(&c->refmvs_dsp);
+
+    // intra edge tree
+    c->intra_edge.root[BL_128X128] = &c->intra_edge.branch_sb128[0].node;
+    dav1d_init_mode_tree(c->intra_edge.root[BL_128X128], c->intra_edge.tip_sb128, 1);
+    c->intra_edge.root[BL_64X64] = &c->intra_edge.branch_sb64[0].node;
+    dav1d_init_mode_tree(c->intra_edge.root[BL_64X64], c->intra_edge.tip_sb64, 0);
+
+    pthread_attr_destroy(&thread_attr);
+
+    return 0;
+
+error:
+    if (c) close_internal(c_out, 0);
+    pthread_attr_destroy(&thread_attr);
+    return DAV1D_ERR(ENOMEM);
+}
+
+static void dummy_free(const uint8_t *const data, void *const user_data) {
+    assert(data && !user_data);
+}
+
+int dav1d_parse_sequence_header(Dav1dSequenceHeader *const out,
+                                const uint8_t *const ptr, const size_t sz)
+{
+    Dav1dData buf = { 0 };
+    int res;
+
+    validate_input_or_ret(out != NULL, DAV1D_ERR(EINVAL));
+
+    Dav1dSettings s;
+    dav1d_default_settings(&s);
+    s.n_threads = 1;
+    s.logger.callback = NULL;
+
+    Dav1dContext *c;
+    res = dav1d_open(&c, &s);
+    if (res < 0) return res;
+
+    if (ptr) {
+        res = dav1d_data_wrap_internal(&buf, ptr, sz, dummy_free, NULL);
+        if (res < 0) goto error;
+    }
+
+    while (buf.sz > 0) {
+        res = dav1d_parse_obus(c, &buf, 1);
+        if (res < 0) goto error;
+
+        assert((size_t)res <= buf.sz);
+        buf.sz -= res;
+        buf.data += res;
+    }
+
+    if (!c->seq_hdr) {
+        res = DAV1D_ERR(ENOENT);
+        goto error;
+    }
+
+    memcpy(out, c->seq_hdr, sizeof(*out));
+
+    res = 0;
+error:
+    dav1d_data_unref_internal(&buf);
+    dav1d_close(&c);
+
+    return res;
+}
+
+static int has_grain(const Dav1dPicture *const pic)
+{
+    const Dav1dFilmGrainData *fgdata = &pic->frame_hdr->film_grain.data;
+    return fgdata->num_y_points || fgdata->num_uv_points[0] ||
+           fgdata->num_uv_points[1] || (fgdata->clip_to_restricted_range &&
+                                        fgdata->chroma_scaling_from_luma);
+}
+
+static int output_image(Dav1dContext *const c, Dav1dPicture *const out)
+{
+    int res = 0;
+
+    Dav1dThreadPicture *const in = (c->all_layers || !c->max_spatial_id)
+                                   ? &c->out : &c->cache;
+    if (!c->apply_grain || !has_grain(&in->p)) {
+        dav1d_picture_move_ref(out, &in->p);
+        dav1d_thread_picture_unref(in);
+        goto end;
+    }
+
+    res = dav1d_apply_grain(c, out, &in->p);
+    dav1d_thread_picture_unref(in);
+end:
+    if (!c->all_layers && c->max_spatial_id && c->out.p.data[0]) {
+        dav1d_thread_picture_move_ref(in, &c->out);
+    }
+    return res;
+}
+
+static int output_picture_ready(Dav1dContext *const c, const int drain) {
+    if (c->cached_error) return 1;
+    if (!c->all_layers && c->max_spatial_id) {
+        if (c->out.p.data[0] && c->cache.p.data[0]) {
+            if (c->max_spatial_id == c->cache.p.frame_hdr->spatial_id ||
+                c->out.flags & PICTURE_FLAG_NEW_TEMPORAL_UNIT)
+                return 1;
+            dav1d_thread_picture_unref(&c->cache);
+            dav1d_thread_picture_move_ref(&c->cache, &c->out);
+            return 0;
+        } else if (c->cache.p.data[0] && drain) {
+            return 1;
+        } else if (c->out.p.data[0]) {
+            dav1d_thread_picture_move_ref(&c->cache, &c->out);
+            return 0;
+        }
+    }
+
+    return !!c->out.p.data[0];
+}
+
+static int drain_picture(Dav1dContext *const c, Dav1dPicture *const out) {
+    unsigned drain_count = 0;
+    int drained = 0;
+    do {
+        const unsigned next = c->frame_thread.next;
+        Dav1dFrameContext *const f = &c->fc[next];
+        pthread_mutex_lock(&c->task_thread.lock);
+        while (f->n_tile_data > 0)
+            pthread_cond_wait(&f->task_thread.cond,
+                              &f->task_thread.ttd->lock);
+        Dav1dThreadPicture *const out_delayed =
+            &c->frame_thread.out_delayed[next];
+        if (out_delayed->p.data[0] || atomic_load(&f->task_thread.error)) {
+            unsigned first = atomic_load(&c->task_thread.first);
+            if (first + 1U < c->n_fc)
+                atomic_fetch_add(&c->task_thread.first, 1U);
+            else
+                atomic_store(&c->task_thread.first, 0);
+            atomic_compare_exchange_strong(&c->task_thread.reset_task_cur,
+                                           &first, UINT_MAX);
+            if (c->task_thread.cur && c->task_thread.cur < c->n_fc)
+                c->task_thread.cur--;
+            drained = 1;
+        } else if (drained) {
+            pthread_mutex_unlock(&c->task_thread.lock);
+            break;
+        }
+        if (++c->frame_thread.next == c->n_fc)
+            c->frame_thread.next = 0;
+        pthread_mutex_unlock(&c->task_thread.lock);
+        const int error = f->task_thread.retval;
+        if (error) {
+            f->task_thread.retval = 0;
+            dav1d_data_props_copy(&c->cached_error_props, &out_delayed->p.m);
+            dav1d_thread_picture_unref(out_delayed);
+            return error;
+        }
+        if (out_delayed->p.data[0]) {
+            const unsigned progress =
+                atomic_load_explicit(&out_delayed->progress[1],
+                                     memory_order_relaxed);
+            if ((out_delayed->visible || c->output_invisible_frames) &&
+                progress != FRAME_ERROR)
+            {
+                dav1d_thread_picture_ref(&c->out, out_delayed);
+                c->event_flags |= dav1d_picture_get_event_flags(out_delayed);
+            }
+            dav1d_thread_picture_unref(out_delayed);
+            if (output_picture_ready(c, 0))
+                return output_image(c, out);
+        }
+    } while (++drain_count < c->n_fc);
+
+    if (output_picture_ready(c, 1))
+        return output_image(c, out);
+
+    return DAV1D_ERR(EAGAIN);
+}
+
+static int gen_picture(Dav1dContext *const c)
+{
+    int res;
+    Dav1dData *const in = &c->in;
+
+    if (output_picture_ready(c, 0))
+        return 0;
+
+    while (in->sz > 0) {
+        res = dav1d_parse_obus(c, in, 0);
+        if (res < 0) {
+            dav1d_data_unref_internal(in);
+        } else {
+            assert((size_t)res <= in->sz);
+            in->sz -= res;
+            in->data += res;
+            if (!in->sz) dav1d_data_unref_internal(in);
+        }
+        if (output_picture_ready(c, 0))
+            break;
+        if (res < 0)
+            return res;
+    }
+
+    return 0;
+}
+
+int dav1d_send_data(Dav1dContext *const c, Dav1dData *const in)
+{
+    validate_input_or_ret(c != NULL, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(in != NULL, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(in->data == NULL || in->sz, DAV1D_ERR(EINVAL));
+
+    if (in->data)
+        c->drain = 0;
+    if (c->in.data)
+        return DAV1D_ERR(EAGAIN);
+    dav1d_data_ref(&c->in, in);
+
+    int res = gen_picture(c);
+    if (!res)
+        dav1d_data_unref_internal(in);
+
+    return res;
+}
+
+int dav1d_get_picture(Dav1dContext *const c, Dav1dPicture *const out)
+{
+    validate_input_or_ret(c != NULL, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(out != NULL, DAV1D_ERR(EINVAL));
+
+    const int drain = c->drain;
+    c->drain = 1;
+
+    int res = gen_picture(c);
+    if (res < 0)
+        return res;
+
+    if (c->cached_error) {
+        const int res = c->cached_error;
+        c->cached_error = 0;
+        return res;
+    }
+
+    if (output_picture_ready(c, c->n_fc == 1))
+        return output_image(c, out);
+
+    if (c->n_fc > 1 && drain)
+        return drain_picture(c, out);
+
+    return DAV1D_ERR(EAGAIN);
+}
+
+int dav1d_apply_grain(Dav1dContext *const c, Dav1dPicture *const out,
+                      const Dav1dPicture *const in)
+{
+    validate_input_or_ret(c != NULL, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(out != NULL, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(in != NULL, DAV1D_ERR(EINVAL));
+
+    if (!has_grain(in)) {
+        dav1d_picture_ref(out, in);
+        return 0;
+    }
+
+    int res = dav1d_picture_alloc_copy(c, out, in->p.w, in);
+    if (res < 0) goto error;
+
+    if (c->n_tc > 1) {
+        dav1d_task_delayed_fg(c, out, in);
+    } else {
+        switch (out->p.bpc) {
+#if CONFIG_8BPC
+        case 8:
+            dav1d_apply_grain_8bpc(&c->dsp[0].fg, out, in);
+            break;
+#endif
+#if CONFIG_16BPC
+        case 10:
+        case 12:
+            dav1d_apply_grain_16bpc(&c->dsp[(out->p.bpc >> 1) - 4].fg, out, in);
+            break;
+#endif
+        default: abort();
+        }
+    }
+
+    return 0;
+
+error:
+    dav1d_picture_unref_internal(out);
+    return res;
+}
+
+void dav1d_flush(Dav1dContext *const c) {
+    dav1d_data_unref_internal(&c->in);
+    if (c->out.p.frame_hdr)
+        dav1d_thread_picture_unref(&c->out);
+    if (c->cache.p.frame_hdr)
+        dav1d_thread_picture_unref(&c->cache);
+
+    c->drain = 0;
+    c->cached_error = 0;
+
+    for (int i = 0; i < 8; i++) {
+        if (c->refs[i].p.p.frame_hdr)
+            dav1d_thread_picture_unref(&c->refs[i].p);
+        dav1d_ref_dec(&c->refs[i].segmap);
+        dav1d_ref_dec(&c->refs[i].refmvs);
+        dav1d_cdf_thread_unref(&c->cdf[i]);
+    }
+    c->frame_hdr = NULL;
+    c->seq_hdr = NULL;
+    dav1d_ref_dec(&c->seq_hdr_ref);
+
+    c->mastering_display = NULL;
+    c->content_light = NULL;
+    c->itut_t35 = NULL;
+    dav1d_ref_dec(&c->mastering_display_ref);
+    dav1d_ref_dec(&c->content_light_ref);
+    dav1d_ref_dec(&c->itut_t35_ref);
+
+    dav1d_data_props_unref_internal(&c->cached_error_props);
+
+    if (c->n_fc == 1 && c->n_tc == 1) return;
+    atomic_store(c->flush, 1);
+
+    // stop running tasks in worker threads
+    if (c->n_tc > 1) {
+        pthread_mutex_lock(&c->task_thread.lock);
+        for (unsigned i = 0; i < c->n_tc; i++) {
+            Dav1dTaskContext *const tc = &c->tc[i];
+            while (!tc->task_thread.flushed) {
+                pthread_cond_wait(&tc->task_thread.td.cond, &c->task_thread.lock);
+            }
+        }
+        for (unsigned i = 0; i < c->n_fc; i++) {
+            c->fc[i].task_thread.task_head = NULL;
+            c->fc[i].task_thread.task_tail = NULL;
+            c->fc[i].task_thread.task_cur_prev = NULL;
+            c->fc[i].task_thread.pending_tasks.head = NULL;
+            c->fc[i].task_thread.pending_tasks.tail = NULL;
+            atomic_init(&c->fc[i].task_thread.pending_tasks.merge, 0);
+        }
+        atomic_init(&c->task_thread.first, 0);
+        c->task_thread.cur = c->n_fc;
+        atomic_store(&c->task_thread.reset_task_cur, UINT_MAX);
+        atomic_store(&c->task_thread.cond_signaled, 0);
+        pthread_mutex_unlock(&c->task_thread.lock);
+    }
+
+    // wait for threads to complete flushing
+    if (c->n_fc > 1) {
+        for (unsigned n = 0, next = c->frame_thread.next; n < c->n_fc; n++, next++) {
+            if (next == c->n_fc) next = 0;
+            Dav1dFrameContext *const f = &c->fc[next];
+            dav1d_decode_frame_exit(f, -1);
+            f->n_tile_data = 0;
+            f->task_thread.retval = 0;
+            Dav1dThreadPicture *out_delayed = &c->frame_thread.out_delayed[next];
+            if (out_delayed->p.frame_hdr) {
+                dav1d_thread_picture_unref(out_delayed);
+            }
+        }
+        c->frame_thread.next = 0;
+    }
+    atomic_store(c->flush, 0);
+}
+
+COLD void dav1d_close(Dav1dContext **const c_out) {
+    validate_input(c_out != NULL);
+    close_internal(c_out, 1);
+}
+
+static COLD void close_internal(Dav1dContext **const c_out, int flush) {
+    Dav1dContext *const c = *c_out;
+    if (!c) return;
+
+    if (flush) dav1d_flush(c);
+
+    if (c->tc) {
+        struct TaskThreadData *ttd = &c->task_thread;
+        if (ttd->inited) {
+            pthread_mutex_lock(&ttd->lock);
+            for (unsigned n = 0; n < c->n_tc && c->tc[n].task_thread.td.inited; n++)
+                c->tc[n].task_thread.die = 1;
+            pthread_cond_broadcast(&ttd->cond);
+            pthread_mutex_unlock(&ttd->lock);
+            for (unsigned n = 0; n < c->n_tc; n++) {
+                Dav1dTaskContext *const pf = &c->tc[n];
+                if (!pf->task_thread.td.inited) break;
+                pthread_join(pf->task_thread.td.thread, NULL);
+                pthread_cond_destroy(&pf->task_thread.td.cond);
+                pthread_mutex_destroy(&pf->task_thread.td.lock);
+            }
+            pthread_cond_destroy(&ttd->delayed_fg.cond);
+            pthread_cond_destroy(&ttd->cond);
+            pthread_mutex_destroy(&ttd->lock);
+        }
+        dav1d_free_aligned(c->tc);
+    }
+
+    for (unsigned n = 0; c->fc && n < c->n_fc; n++) {
+        Dav1dFrameContext *const f = &c->fc[n];
+
+        // clean-up threading stuff
+        if (c->n_fc > 1) {
+            freep(&f->tile_thread.lowest_pixel_mem);
+            freep(&f->frame_thread.b);
+            dav1d_freep_aligned(&f->frame_thread.pal_idx);
+            dav1d_freep_aligned(&f->frame_thread.cf);
+            freep(&f->frame_thread.tile_start_off);
+            dav1d_freep_aligned(&f->frame_thread.pal);
+            freep(&f->frame_thread.cbi);
+        }
+        if (c->n_tc > 1) {
+            pthread_mutex_destroy(&f->task_thread.pending_tasks.lock);
+            pthread_cond_destroy(&f->task_thread.cond);
+            pthread_mutex_destroy(&f->task_thread.lock);
+        }
+        freep(&f->frame_thread.frame_progress);
+        freep(&f->task_thread.tasks);
+        freep(&f->task_thread.tile_tasks[0]);
+        dav1d_free_aligned(f->ts);
+        dav1d_free_aligned(f->ipred_edge[0]);
+        free(f->a);
+        free(f->tile);
+        free(f->lf.mask);
+        free(f->lf.lr_mask);
+        free(f->lf.level);
+        free(f->lf.tx_lpf_right_edge[0]);
+        free(f->lf.start_of_tile_row);
+        dav1d_refmvs_clear(&f->rf);
+        dav1d_free_aligned(f->lf.cdef_line_buf);
+        dav1d_free_aligned(f->lf.lr_line_buf);
+    }
+    dav1d_free_aligned(c->fc);
+    if (c->n_fc > 1 && c->frame_thread.out_delayed) {
+        for (unsigned n = 0; n < c->n_fc; n++)
+            if (c->frame_thread.out_delayed[n].p.frame_hdr)
+                dav1d_thread_picture_unref(&c->frame_thread.out_delayed[n]);
+        free(c->frame_thread.out_delayed);
+    }
+    for (int n = 0; n < c->n_tile_data; n++)
+        dav1d_data_unref_internal(&c->tile[n].data);
+    free(c->tile);
+    for (int n = 0; n < 8; n++) {
+        dav1d_cdf_thread_unref(&c->cdf[n]);
+        if (c->refs[n].p.p.frame_hdr)
+            dav1d_thread_picture_unref(&c->refs[n].p);
+        dav1d_ref_dec(&c->refs[n].refmvs);
+        dav1d_ref_dec(&c->refs[n].segmap);
+    }
+    dav1d_ref_dec(&c->seq_hdr_ref);
+    dav1d_ref_dec(&c->frame_hdr_ref);
+
+    dav1d_ref_dec(&c->mastering_display_ref);
+    dav1d_ref_dec(&c->content_light_ref);
+    dav1d_ref_dec(&c->itut_t35_ref);
+
+    dav1d_mem_pool_end(c->seq_hdr_pool);
+    dav1d_mem_pool_end(c->frame_hdr_pool);
+    dav1d_mem_pool_end(c->segmap_pool);
+    dav1d_mem_pool_end(c->refmvs_pool);
+    dav1d_mem_pool_end(c->cdf_pool);
+    dav1d_mem_pool_end(c->picture_pool);
+
+    dav1d_freep_aligned(c_out);
+}
+
+int dav1d_get_event_flags(Dav1dContext *const c, enum Dav1dEventFlags *const flags) {
+    validate_input_or_ret(c != NULL, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(flags != NULL, DAV1D_ERR(EINVAL));
+
+    *flags = c->event_flags;
+    c->event_flags = 0;
+    return 0;
+}
+
+int dav1d_get_decode_error_data_props(Dav1dContext *const c, Dav1dDataProps *const out) {
+    validate_input_or_ret(c != NULL, DAV1D_ERR(EINVAL));
+    validate_input_or_ret(out != NULL, DAV1D_ERR(EINVAL));
+
+    dav1d_data_props_unref_internal(out);
+    *out = c->cached_error_props;
+    dav1d_data_props_set_defaults(&c->cached_error_props);
+
+    return 0;
+}
+
+void dav1d_picture_unref(Dav1dPicture *const p) {
+    dav1d_picture_unref_internal(p);
+}
+
+uint8_t *dav1d_data_create(Dav1dData *const buf, const size_t sz) {
+    return dav1d_data_create_internal(buf, sz);
+}
+
+int dav1d_data_wrap(Dav1dData *const buf, const uint8_t *const ptr,
+                    const size_t sz,
+                    void (*const free_callback)(const uint8_t *data,
+                                                void *user_data),
+                    void *const user_data)
+{
+    return dav1d_data_wrap_internal(buf, ptr, sz, free_callback, user_data);
+}
+
+int dav1d_data_wrap_user_data(Dav1dData *const buf,
+                              const uint8_t *const user_data,
+                              void (*const free_callback)(const uint8_t *user_data,
+                                                          void *cookie),
+                              void *const cookie)
+{
+    return dav1d_data_wrap_user_data_internal(buf,
+                                              user_data,
+                                              free_callback,
+                                              cookie);
+}
+
+void dav1d_data_unref(Dav1dData *const buf) {
+    dav1d_data_unref_internal(buf);
+}
+
+void dav1d_data_props_unref(Dav1dDataProps *const props) {
+    dav1d_data_props_unref_internal(props);
+}