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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mpv_talloc.h"
#include "common/global.h"
#include "vo.h"
#include "video/mp_image.h"
#include "wayland_common.h"
#include "generated/wayland/linux-dmabuf-unstable-v1.h"
#include "pthread.h"
#include "wlbuf_pool.h"
#define WLBUF_POOL_NUM_ALLOCATED_INIT 30
static void wlbuf_pool_entry_free(struct wlbuf_pool_entry *entry, bool force);
/**
* When trying to free pool entries that are being held by Wayland,
* these entries are set to pending free state. They will be freed
* when either the frame listener gets called, or the vo is uninitialized
*/
static bool set_pending_free(struct wlbuf_pool_entry *entry) {
if (entry->image) {
MP_TRACE(entry->vo, "Pending free for buffer pool entry : %lu\n",
entry->key);
entry->pending_free = true;
// add to purgatory
struct wlbuf_pool *pool = entry->pool;
for (int i = 0; i < WLBUF_NUM_PURG_ENTRIES; ++i) {
if (pool->purg.entries[i] == NULL) {
pool->purg.entries[i] = entry;
break;
}
}
}
return entry->image;
}
/**
* Complete pending free of entry.
*
*/
static void complete_pending_free(struct wlbuf_pool_entry *entry) {
if (entry->pending_free) {
// 1. remove from purgatory
struct wlbuf_pool *pool = entry->pool;
for (int i = 0; i < WLBUF_NUM_PURG_ENTRIES; ++i) {
if (pool->purg.entries[i] == entry) {
pool->purg.entries[i] = NULL;
break;
}
}
// 2. free entry
wlbuf_pool_entry_free(entry, false);
}
}
/**
* Free all purgatory entries
*/
static void free_purgatory(struct wlbuf_pool *pool){
for (int i = 0; i < WLBUF_NUM_PURG_ENTRIES; ++i)
wlbuf_pool_entry_free(pool->purg.entries[i], true);
}
struct wlbuf_pool *wlbuf_pool_alloc(struct vo *vo, struct vo_wayland_state *wl, wlbuf_pool_key_provider key_provider,
wlbuf_pool_dmabuf_importer dmabuf_importer)
{
struct wlbuf_pool *pool = talloc(NULL, struct wlbuf_pool);
memset(pool, 0, sizeof(struct wlbuf_pool));
pool->num_allocated = WLBUF_POOL_NUM_ALLOCATED_INIT;
pool->entries = talloc_array(pool, struct wlbuf_pool_entry *, pool->num_allocated);
memset(pool->entries, 0, pool->num_allocated * sizeof(struct wlbuf_pool_entry *));
pool->vo = vo;
pool->key_provider = key_provider;
pool->dmabuf_importer = dmabuf_importer;
pool->wl = wl;
for (int i = 0; i < WLBUF_NUM_PURG_ENTRIES; ++i)
pool->purg.entries[i] = NULL;
return pool;
}
void wlbuf_pool_clean(struct wlbuf_pool *pool, bool final_clean)
{
int i;
if (!pool)
return;
MP_TRACE(pool->vo, "Begin clean pool\n");
if (final_clean)
free_purgatory(pool);
for (i = 0; i < pool->num_allocated; ++i) {
struct wlbuf_pool_entry *entry = pool->entries[i];
if (!entry)
continue;
wlbuf_pool_entry_free(entry, final_clean);
pool->entries[i] = NULL;
}
pool->num_entries = 0;
MP_TRACE(pool->vo, "End clean pool\n");
}
void wlbuf_pool_free(struct wlbuf_pool *pool)
{
if (!pool)
return;
wlbuf_pool_clean(pool, true);
talloc_free(pool);
}
static void wlbuf_pool_entry_free(struct wlbuf_pool_entry *entry, bool force)
{
if (!entry)
return;
if (force && entry->image) {
mp_image_unrefp(&entry->image);
entry->image = NULL;
}
if (!set_pending_free(entry)) {
MP_TRACE(entry->vo, "Free buffer pool entry : %lu\n", entry->key);
if (entry->buffer)
wl_buffer_destroy(entry->buffer);
talloc_free(entry);
}
}
/**
* Unref pool entry's image, and also free entry itself if it's set to pending_free
*/
static void wlbuf_pool_entry_release(void *data, struct wl_buffer *wl_buffer)
{
struct wlbuf_pool_entry *entry = (struct wlbuf_pool_entry*) data;
MP_TRACE(entry->vo, "Release buffer pool entry : %lu\n", entry->key);
// 1. always unref image
if (entry->image)
mp_image_unrefp(&entry->image);
entry->image = NULL;
// 2. complete pending free if needed
complete_pending_free(entry);
}
static const struct wl_buffer_listener wlbuf_pool_listener = {
wlbuf_pool_entry_release,
};
struct wlbuf_pool_entry *wlbuf_pool_get_entry(struct wlbuf_pool *pool, struct mp_image *src)
{
uintptr_t key;
struct wlbuf_pool_entry *entry;
struct vo_wayland_state *wl = pool->wl;
bool import_successful;
struct zwp_linux_buffer_params_v1 *params;
if (!pool || !src)
return NULL;
/* 1. try to find existing entry in pool */
src = mp_image_new_ref(src);
key = pool->key_provider(src);
for (int i = 0; i < pool->num_entries; ++i) {
struct wlbuf_pool_entry *item = pool->entries[i];
if (!item)
continue;
if (item->key == key) {
if (item->image) {
mp_image_unrefp(&src);
MP_DBG(item->vo, "Buffer already scheduled - returning NULL.\n");
return NULL;
} else {
item->image = src;
return item;
}
}
}
/* 2. otherwise allocate new entry and buffer */
entry = talloc(pool, struct wlbuf_pool_entry);
memset(entry, 0, sizeof(struct wlbuf_pool_entry));
entry->vo = pool->vo;
entry->key = pool->key_provider(src);
entry->pool = pool;
MP_TRACE(entry->vo, "Allocate buffer pool entry : %lu\n", entry->key);
params = zwp_linux_dmabuf_v1_create_params(wl->dmabuf);
import_successful = pool->dmabuf_importer(src, entry, params);
if (!import_successful) {
MP_DBG(entry->vo, "Failed to import\n");
wlbuf_pool_entry_free(entry, false);
} else {
entry->buffer = zwp_linux_buffer_params_v1_create_immed(params, src->params.w, src->params.h,
entry->drm_format, 0);
}
zwp_linux_buffer_params_v1_destroy(params);
if (!import_successful) {
mp_image_unrefp(&src);
return NULL;
}
/* 3. add new entry to pool */
if (pool->num_entries == pool->num_allocated) {
int current_num_allocated = pool->num_allocated;
pool->num_allocated *= 2;
pool->entries = talloc_realloc(pool, pool->entries, struct wlbuf_pool_entry *, pool->num_allocated);
for (int i = current_num_allocated; i < pool->num_allocated; ++i)
pool->entries[i] = NULL;
}
wl_buffer_add_listener(entry->buffer, &wlbuf_pool_listener, entry);
entry->image = src;
pool->entries[pool->num_entries++] = entry;
return entry;
}
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