/*

 * 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 <errno.h>

#include <stdint.h>

#include <stdlib.h>

#include <string.h>

#include "dav1d/data.h"

#include "common/attributes.h"

#include "common/validate.h"

#include "src/data.h"

#include "src/ref.h"

uint8_t *dav1d_data_create_internal(Dav1dData *const buf, const size_t sz) {

    validate_input_or_ret(buf != NULL, NULL);

    if (sz > SIZE_MAX / 2) return NULL;

    buf->ref = dav1d_ref_create(ALLOC_DAV1DDATA, sz);

    if (!buf->ref) return NULL;

    buf->data = buf->ref->const_data;

    buf->sz = sz;

    dav1d_data_props_set_defaults(&buf->m);

    buf->m.size = sz;

    return buf->ref->data;

}

int dav1d_data_wrap_internal(Dav1dData *const buf, const uint8_t *const ptr,

                             const size_t sz,

                             void (*const free_callback)(const uint8_t *data,

                                                         void *cookie),

                             void *const cookie)

{

    validate_input_or_ret(buf != NULL, DAV1D_ERR(EINVAL));

    validate_input_or_ret(ptr != NULL, DAV1D_ERR(EINVAL));

    validate_input_or_ret(free_callback != NULL, DAV1D_ERR(EINVAL));

    if (sz > SIZE_MAX / 2) return DAV1D_ERR(EINVAL);

    Dav1dRef *const ref = dav1d_malloc(ALLOC_DAV1DDATA, sizeof(Dav1dRef));

    if (!ref) return DAV1D_ERR(ENOMEM);

    buf->ref = dav1d_ref_init(ref, ptr, free_callback, cookie, 1);

    buf->data = ptr;

    buf->sz = sz;

    dav1d_data_props_set_defaults(&buf->m);

    buf->m.size = sz;

    return 0;

}

int dav1d_data_wrap_user_data_internal(Dav1dData *const buf,

                                       const uint8_t *const user_data,

                                       void (*const free_callback)(const uint8_t *user_data,

                                                                   void *cookie),

                                       void *const cookie)

{

    validate_input_or_ret(buf != NULL, DAV1D_ERR(EINVAL));

    validate_input_or_ret(free_callback != NULL, DAV1D_ERR(EINVAL));

    Dav1dRef *const ref = dav1d_malloc(ALLOC_DAV1DDATA, sizeof(Dav1dRef));

    if (!ref) return DAV1D_ERR(ENOMEM);

    buf->m.user_data.ref = dav1d_ref_init(ref, user_data, free_callback, cookie, 1);

    buf->m.user_data.data = user_data;

    return 0;

}

void dav1d_data_ref(Dav1dData *const dst, const Dav1dData *const src) {

    assert(dst != NULL);

    assert(dst->data == NULL);

    assert(src != NULL);

    if (src->ref) {

        assert(src->data != NULL);

        dav1d_ref_inc(src->ref);

    }

    if (src->m.user_data.ref) dav1d_ref_inc(src->m.user_data.ref);

    *dst = *src;

}

void dav1d_data_props_copy(Dav1dDataProps *const dst,

                           const Dav1dDataProps *const src)

{

    assert(dst != NULL);

    assert(src != NULL);

    dav1d_ref_dec(&dst->user_data.ref);

    *dst = *src;

    if (dst->user_data.ref) dav1d_ref_inc(dst->user_data.ref);

}

void dav1d_data_props_set_defaults(Dav1dDataProps *const props) {

    assert(props != NULL);

    memset(props, 0, sizeof(*props));

    props->timestamp = INT64_MIN;

    props->offset = -1;

}

void dav1d_data_props_unref_internal(Dav1dDataProps *const props) {

    validate_input(props != NULL);

    struct Dav1dRef *user_data_ref = props->user_data.ref;

    dav1d_data_props_set_defaults(props);

    dav1d_ref_dec(&user_data_ref);

}

void dav1d_data_unref_internal(Dav1dData *const buf) {

    validate_input(buf != NULL);

    struct Dav1dRef *user_data_ref = buf->m.user_data.ref;

    if (buf->ref) {

        validate_input(buf->data != NULL);

        dav1d_ref_dec(&buf->ref);

    }

    memset(buf, 0, sizeof(*buf));

    dav1d_data_props_set_defaults(&buf->m);

    dav1d_ref_dec(&user_data_ref);

}