/*
 *  gstvaapidecoder_unit.c - VA decoder units
 *
 *  Copyright (C) 2012 Intel Corporation
 *
 *  This library 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.
 *
 *  This library 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 this library; if not, write to the Free
 *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301 USA
 */

/**
 * SECTION:gstvaapidecoder_unit
 * @short_description: Decoder unit
 */

#include "sysdeps.h"
#include "gstvaapidecoder_unit.h"

static inline const GstVaapiMiniObjectClass *
gst_vaapi_decoder_unit_class(void)
{
    static const GstVaapiMiniObjectClass GstVaapiDecoderUnitClass = {
        sizeof(GstVaapiDecoderUnit),
        (GDestroyNotify)gst_vaapi_decoder_unit_finalize
    };
    return &GstVaapiDecoderUnitClass;
}

/**
 * gst_vaapi_decoder_unit_init:
 * @unit: a #GstVaapiDecoderUnit
 *
 * Initializes internal resources bound to the supplied decoder @unit.
 *
 * @note This is an internal function used to implement lightweight
 * sub-classes.
 */
static inline void
decoder_unit_init(GstVaapiDecoderUnit *unit, guint size)
{
    unit->size = size;
    unit->offset = 0;
    unit->buffer = NULL;

    unit->parsed_info = NULL;
    unit->parsed_info_destroy_notify = NULL;
}

void
gst_vaapi_decoder_unit_init(GstVaapiDecoderUnit *unit, guint size)
{
    decoder_unit_init(unit, size);
}

/**
 * gst_vaapi_decoder_unit_finalize:
 * @unit: a #GstVaapiDecoderUnit
 *
 * Deallocates any internal resources bound to the supplied decoder
 * @unit.
 *
 * @note This is an internal function used to implement lightweight
 * sub-classes.
 */
static inline void
decoder_unit_finalize(GstVaapiDecoderUnit *unit)
{
    gst_buffer_replace(&unit->buffer, NULL);
    gst_vaapi_decoder_unit_set_parsed_info(unit, NULL, NULL);
}

void
gst_vaapi_decoder_unit_finalize(GstVaapiDecoderUnit *unit)
{
    decoder_unit_finalize(unit);
}

/**
 * gst_vaapi_decoder_unit_new:
 * @size: size in bytes of this bitstream data chunk
 *
 * Creates a new #GstVaapiDecoderUnit object.
 *
 * Returns: The newly allocated #GstVaapiDecoderUnit
 */
GstVaapiDecoderUnit *
gst_vaapi_decoder_unit_new(guint size)
{
    GstVaapiDecoderUnit *unit;

    unit = (GstVaapiDecoderUnit *)
        gst_vaapi_mini_object_new(gst_vaapi_decoder_unit_class());
    if (!unit)
        return NULL;

    decoder_unit_init(unit, size);
    return unit;
}

/**
 * gst_vaapi_decoder_unit_set_buffer:
 * @unit: a #GstVaapiDecoderUnit
 * @buffer: the new #GstBuffer to set
 *
 * Sets new buffer to the supplied decoder unit. The @unit holds an
 * extra reference to the @buffer if it is not NULL.
 */
void
gst_vaapi_decoder_unit_set_buffer(GstVaapiDecoderUnit *unit, GstBuffer *buffer)
{
    g_return_if_fail(GST_VAAPI_IS_DECODER_UNIT(unit));

    gst_buffer_replace(&unit->buffer, buffer);
}

/**
 * gst_vaapi_decoder_unit_set_parsed_info:
 * @unit: a #GstVaapiDecoderUnit
 * @parsed_info: parser info
 * @destroy_notify: (closure parsed_info): a #GDestroyNotify
 *
 * Sets @parsed_info on the object and the #GDestroyNotify that will be
 * called when the data is freed.
 *
 * If some @parsed_info was previously set, then the former @destroy_notify
 * function will be called before the @parsed_info is replaced.
 */
void
gst_vaapi_decoder_unit_set_parsed_info(GstVaapiDecoderUnit *unit,
    gpointer parsed_info, GDestroyNotify destroy_notify)
{
    g_return_if_fail(GST_VAAPI_IS_DECODER_UNIT(unit));

    if (unit->parsed_info && unit->parsed_info_destroy_notify)
        unit->parsed_info_destroy_notify(unit->parsed_info);
    unit->parsed_info = parsed_info;
    unit->parsed_info_destroy_notify = destroy_notify;
}