gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth265picture.c

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/* GStreamer
* Copyright (C) 2019 Seungha Yang <seungha.yang@navercorp.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "gsth265picture.h"
#include "gstcodecpicture-private.h"
GST_DEBUG_CATEGORY_EXTERN (gst_h265_decoder_debug);
#define GST_CAT_DEFAULT gst_h265_decoder_debug
GST_DEFINE_MINI_OBJECT_TYPE (GstH265Picture, gst_h265_picture);
/**
* gst_h265_picture_new:
*
* Create new #GstH265Picture
*
* Returns: a new #GstH265Picture
*/
GstH265Picture *
gst_h265_picture_new (void)
{
GstH265Picture *pic;
pic = g_new0 (GstH265Picture, 1);
pic->pic_struct = GST_H265_SEI_PIC_STRUCT_FRAME;
/* 0: interlaced, 1: progressive, 2: unspecified, 3: reserved, can be
* interpreted as 2 */
pic->source_scan_type = 2;
pic->duplicate_flag = 0;
gst_mini_object_init (GST_MINI_OBJECT_CAST (pic), 0,
GST_TYPE_H265_PICTURE, NULL, NULL,
(GstMiniObjectFreeFunction) gst_codec_picture_free);
return pic;
}
struct _GstH265Dpb
{
GArray *pic_list;
gint max_num_pics;
gint num_output_needed;
};
/**
* gst_h265_dpb_new: (skip)
*
* Create new #GstH265Dpb
*
* Returns: a new #GstH265Dpb
*/
GstH265Dpb *
gst_h265_dpb_new (void)
{
GstH265Dpb *dpb;
dpb = g_new0 (GstH265Dpb, 1);
dpb->pic_list =
g_array_sized_new (FALSE, TRUE, sizeof (GstH265Picture *),
GST_H265_DPB_MAX_SIZE);
g_array_set_clear_func (dpb->pic_list,
(GDestroyNotify) gst_clear_h265_picture);
return dpb;
}
/**
* gst_h265_dpb_set_max_num_pics:
* @dpb: a #GstH265Dpb
* @max_num_pics: the maximum number of picture
*
* Set the number of maximum allowed pictures to store
*/
void
gst_h265_dpb_set_max_num_pics (GstH265Dpb * dpb, gint max_num_pics)
{
g_return_if_fail (dpb != NULL);
dpb->max_num_pics = max_num_pics;
}
/**
* gst_h265_dpb_get_max_num_pics:
* @dpb: a #GstH265Dpb
*
* Returns: the number of maximum pictures
*/
gint
gst_h265_dpb_get_max_num_pics (GstH265Dpb * dpb)
{
g_return_val_if_fail (dpb != NULL, 0);
return dpb->max_num_pics;
}
/**
* gst_h265_dpb_free:
* @dpb: a #GstH265Dpb to free
*
* Free the @dpb
*/
void
gst_h265_dpb_free (GstH265Dpb * dpb)
{
g_return_if_fail (dpb != NULL);
gst_h265_dpb_clear (dpb);
g_array_unref (dpb->pic_list);
g_free (dpb);
}
/**
* gst_h265_dpb_clear:
* @dpb: a #GstH265Dpb
*
* Clear all stored #GstH265Picture
*/
void
gst_h265_dpb_clear (GstH265Dpb * dpb)
{
g_return_if_fail (dpb != NULL);
g_array_set_size (dpb->pic_list, 0);
dpb->num_output_needed = 0;
}
/**
* gst_h265_dpb_add:
* @dpb: a #GstH265Dpb
* @picture: (transfer full): a #GstH265Picture
*
* Store the @picture and perform increase pic_latency_cnt as defined in
* "C.5.2.3 Additional bumping" process
*/
void
gst_h265_dpb_add (GstH265Dpb * dpb, GstH265Picture * picture)
{
g_return_if_fail (dpb != NULL);
g_return_if_fail (GST_IS_H265_PICTURE (picture));
if (picture->output_flag) {
gint i;
for (i = 0; i < dpb->pic_list->len; i++) {
GstH265Picture *other =
g_array_index (dpb->pic_list, GstH265Picture *, i);
if (other->needed_for_output)
other->pic_latency_cnt++;
}
dpb->num_output_needed++;
picture->needed_for_output = TRUE;
} else {
picture->needed_for_output = FALSE;
}
/* C.3.4 */
picture->ref = TRUE;
picture->long_term = FALSE;
g_array_append_val (dpb->pic_list, picture);
}
/**
* gst_h265_dpb_delete_unused:
* @dpb: a #GstH265Dpb
*
* Delete not needed for output and not referenced all pictures from dpb
*/
void
gst_h265_dpb_delete_unused (GstH265Dpb * dpb)
{
gint i;
g_return_if_fail (dpb != NULL);
for (i = 0; i < dpb->pic_list->len; i++) {
GstH265Picture *picture =
g_array_index (dpb->pic_list, GstH265Picture *, i);
if (!picture->needed_for_output && !picture->ref) {
GST_TRACE ("remove picture %p (poc %d) from dpb",
picture, picture->pic_order_cnt);
g_array_remove_index (dpb->pic_list, i);
i--;
}
}
}
/**
* gst_h265_dpb_num_ref_pictures:
* @dpb: a #GstH265Dpb
*
* Returns: The number of referenced pictures
*/
gint
gst_h265_dpb_num_ref_pictures (GstH265Dpb * dpb)
{
gint i;
gint ret = 0;
g_return_val_if_fail (dpb != NULL, -1);
for (i = 0; i < dpb->pic_list->len; i++) {
GstH265Picture *picture =
g_array_index (dpb->pic_list, GstH265Picture *, i);
if (picture->ref)
ret++;
}
return ret;
}
/**
* gst_h265_dpb_mark_all_non_ref:
* @dpb: a #GstH265Dpb
*
* Mark all pictures are not referenced
*/
void
gst_h265_dpb_mark_all_non_ref (GstH265Dpb * dpb)
{
gint i;
g_return_if_fail (dpb != NULL);
for (i = 0; i < dpb->pic_list->len; i++) {
GstH265Picture *picture =
g_array_index (dpb->pic_list, GstH265Picture *, i);
picture->ref = FALSE;
}
}
/**
* gst_h265_dpb_get_ref_by_poc:
* @dpb: a #GstH265Dpb
* @poc: a picture order count
*
* Find a short or long term reference picture which has matching poc
*
* Returns: (nullable) (transfer full): a #GstH265Picture
*/
GstH265Picture *
gst_h265_dpb_get_ref_by_poc (GstH265Dpb * dpb, gint poc)
{
gint i;
g_return_val_if_fail (dpb != NULL, NULL);
for (i = 0; i < dpb->pic_list->len; i++) {
GstH265Picture *picture =
g_array_index (dpb->pic_list, GstH265Picture *, i);
if (picture->ref && picture->pic_order_cnt == poc)
return gst_h265_picture_ref (picture);
}
GST_DEBUG ("No short term reference picture for %d", poc);
return NULL;
}
/**
* gst_h265_dpb_get_ref_by_poc_lsb:
* @dpb: a #GstH265Dpb
* @poc_lsb: a picture order count lsb
*
* Find a short or long term reference picture which has matching poc_lsb
*
* Returns: (nullable) (transfer full): a #GstH265Picture
*/
GstH265Picture *
gst_h265_dpb_get_ref_by_poc_lsb (GstH265Dpb * dpb, gint poc_lsb)
{
gint i;
g_return_val_if_fail (dpb != NULL, NULL);
for (i = 0; i < dpb->pic_list->len; i++) {
GstH265Picture *picture =
g_array_index (dpb->pic_list, GstH265Picture *, i);
if (picture->ref && picture->pic_order_cnt_lsb == poc_lsb)
return gst_h265_picture_ref (picture);
}
GST_DEBUG ("No short term reference picture for %d", poc_lsb);
return NULL;
}
/**
* gst_h265_dpb_get_short_ref_by_poc:
* @dpb: a #GstH265Dpb
* @poc: a picture order count
*
* Find a short term reference picture which has matching poc
*
* Returns: (nullable) (transfer full): a #GstH265Picture
*/
GstH265Picture *
gst_h265_dpb_get_short_ref_by_poc (GstH265Dpb * dpb, gint poc)
{
gint i;
g_return_val_if_fail (dpb != NULL, NULL);
for (i = 0; i < dpb->pic_list->len; i++) {
GstH265Picture *picture =
g_array_index (dpb->pic_list, GstH265Picture *, i);
if (picture->ref && !picture->long_term && picture->pic_order_cnt == poc)
return gst_h265_picture_ref (picture);
}
GST_DEBUG ("No short term reference picture for %d", poc);
return NULL;
}
/**
* gst_h265_dpb_get_long_ref_by_poc:
* @dpb: a #GstH265Dpb
* @poc: a picture order count
*
* Find a long term reference picture which has matching poc
*
* Returns: (nullable) (transfer full): a #GstH265Picture
*/
GstH265Picture *
gst_h265_dpb_get_long_ref_by_poc (GstH265Dpb * dpb, gint poc)
{
gint i;
g_return_val_if_fail (dpb != NULL, NULL);
for (i = 0; i < dpb->pic_list->len; i++) {
GstH265Picture *picture =
g_array_index (dpb->pic_list, GstH265Picture *, i);
if (picture->ref && picture->long_term && picture->pic_order_cnt == poc)
return gst_h265_picture_ref (picture);
}
GST_DEBUG ("No long term reference picture for %d", poc);
return NULL;
}
/**
* gst_h265_dpb_get_pictures_all:
* @dpb: a #GstH265Dpb
*
* Return: (element-type GstH265Picture) (transfer full): a #GArray of
* #GstH265Picture stored in @dpb
*/
GArray *
gst_h265_dpb_get_pictures_all (GstH265Dpb * dpb)
{
g_return_val_if_fail (dpb != NULL, NULL);
return g_array_ref (dpb->pic_list);
}
/**
* gst_h265_dpb_get_size:
* @dpb: a #GstH265Dpb
*
* Return: the length of stored dpb array
*/
gint
gst_h265_dpb_get_size (GstH265Dpb * dpb)
{
g_return_val_if_fail (dpb != NULL, -1);
return dpb->pic_list->len;
}
/**
* gst_h265_dpb_get_picture:
* @dpb: a #GstH265Dpb
* @system_frame_number The system frame number
*
* Returns: (transfer full) (nullable): the picture identified with the specified
* @system_frame_number, or %NULL if DPB does not contain a #GstH265Picture
* corresponding to the @system_frame_number
*
* Since: 1.20
*/
GstH265Picture *
gst_h265_dpb_get_picture (GstH265Dpb * dpb, guint32 system_frame_number)
{
gint i;
g_return_val_if_fail (dpb != NULL, NULL);
for (i = 0; i < dpb->pic_list->len; i++) {
GstH265Picture *picture =
g_array_index (dpb->pic_list, GstH265Picture *, i);
if (GST_CODEC_PICTURE_FRAME_NUMBER (picture) == system_frame_number) {
gst_h265_picture_ref (picture);
return picture;
}
}
return NULL;
}
static gboolean
gst_h265_dpb_check_latency_count (GstH265Dpb * dpb, guint32 max_latency)
{
gint i;
for (i = 0; i < dpb->pic_list->len; i++) {
GstH265Picture *picture =
g_array_index (dpb->pic_list, GstH265Picture *, i);
if (!picture->needed_for_output)
continue;
if (picture->pic_latency_cnt >= max_latency)
return TRUE;
}
return FALSE;
}
/**
* gst_h265_dpb_needs_bump:
* @dpb: a #GstH265Dpb
* @max_num_reorder_pics: sps_max_num_reorder_pics[HighestTid]
* @max_latency_increase: SpsMaxLatencyPictures[HighestTid]
* @max_dec_pic_buffering: sps_max_dec_pic_buffering_minus1[HighestTid ] + 1
* or zero if this shouldn't be used for bumping decision
*
* Returns: %TRUE if bumping is required
*
* Since: 1.20
*/
gboolean
gst_h265_dpb_needs_bump (GstH265Dpb * dpb, guint max_num_reorder_pics,
guint max_latency_increase, guint max_dec_pic_buffering)
{
g_return_val_if_fail (dpb != NULL, FALSE);
g_assert (dpb->num_output_needed >= 0);
/* If DPB is full and there is no empty space to store current picture,
* need bumping.
* NOTE: current picture was added already by our decoding flow, so we
* need to do bumping until dpb->pic_list->len == dpb->max_num_pic
*/
if (dpb->pic_list->len > dpb->max_num_pics) {
GST_TRACE ("No empty frame buffer, need bumping");
return TRUE;
}
/* C.5.2.3 */
if (dpb->num_output_needed > max_num_reorder_pics) {
GST_TRACE ("num_output_needed (%d) > max_num_reorder_pics (%d)",
dpb->num_output_needed, max_num_reorder_pics);
return TRUE;
}
if (dpb->num_output_needed && max_latency_increase &&
gst_h265_dpb_check_latency_count (dpb, max_latency_increase)) {
GST_TRACE ("has late picture, max_latency_increase: %d",
max_latency_increase);
return TRUE;
}
/* C.5.2.2 */
if (max_dec_pic_buffering && dpb->pic_list->len >= max_dec_pic_buffering) {
GST_TRACE ("dpb size (%d) >= max_dec_pic_buffering (%d)",
dpb->pic_list->len, max_dec_pic_buffering);
return TRUE;
}
return FALSE;
}
static gint
gst_h265_dpb_get_lowest_output_needed_picture (GstH265Dpb * dpb,
GstH265Picture ** picture)
{
gint i;
GstH265Picture *lowest = NULL;
gint index = -1;
*picture = NULL;
for (i = 0; i < dpb->pic_list->len; i++) {
GstH265Picture *picture =
g_array_index (dpb->pic_list, GstH265Picture *, i);
if (!picture->needed_for_output)
continue;
if (!lowest) {
lowest = picture;
index = i;
continue;
}
if (picture->pic_order_cnt < lowest->pic_order_cnt) {
lowest = picture;
index = i;
}
}
if (lowest)
*picture = gst_h265_picture_ref (lowest);
return index;
}
/**
* gst_h265_dpb_bump:
* @dpb: a #GstH265Dpb
* @drain: whether draining or not
*
* Perform bumping process as defined in C.5.2.4 "Bumping" process.
* If @drain is %TRUE, @dpb will remove a #GstH265Picture from internal array
* so that returned #GstH265Picture could hold the last reference of it
*
* Returns: (nullable) (transfer full): a #GstH265Picture which is needed to be
* outputted
*
* Since: 1.20
*/
GstH265Picture *
gst_h265_dpb_bump (GstH265Dpb * dpb, gboolean drain)
{
GstH265Picture *picture;
gint index;
g_return_val_if_fail (dpb != NULL, NULL);
/* C.5.2.4 "Bumping" process */
index = gst_h265_dpb_get_lowest_output_needed_picture (dpb, &picture);
if (!picture || index < 0)
return NULL;
picture->needed_for_output = FALSE;
dpb->num_output_needed--;
g_assert (dpb->num_output_needed >= 0);
if (!picture->ref || drain)
g_array_remove_index_fast (dpb->pic_list, index);
return picture;
}