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gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth265decoder.c
Seungha Yang ad136cb2c5 h265decoder: Fix for unhandled low-delay decoding case 
Baseclass calls get_preferred_output_delay() in a chain of
sequence header parsing and then new_sequence() is called
with required DPB size (includes render-delay) information.
Thus latency query should happen before the sequence header
parsing for subclass to report required render-delay accordingly
via get_preferred_output_delay() method.
(e.g., zero delay in case of live pipeline)

This commit is to fix wrong liveness signalling in case of
upstream packetized format.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2364>
2022-05-05 14:10:39 +00:00

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/* GStreamer
* Copyright (C) 2015 Intel Corporation
* Author: Sreerenj Balachandran <sreerenj.balachandran@intel.com>
* 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.
*/
/**
* SECTION:gsth265decoder
* @title: GstH265Decoder
* @short_description: Base class to implement stateless H.265 decoders
* @sources:
* - gsth265picture.h
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <gst/base/base.h>
#include "gsth265decoder.h"
GST_DEBUG_CATEGORY (gst_h265_decoder_debug);
#define GST_CAT_DEFAULT gst_h265_decoder_debug
typedef enum
{
GST_H265_DECODER_FORMAT_NONE,
GST_H265_DECODER_FORMAT_HVC1,
GST_H265_DECODER_FORMAT_HEV1,
GST_H265_DECODER_FORMAT_BYTE
} GstH265DecoderFormat;
typedef enum
{
GST_H265_DECODER_ALIGN_NONE,
GST_H265_DECODER_ALIGN_NAL,
GST_H265_DECODER_ALIGN_AU
} GstH265DecoderAlign;
struct _GstH265DecoderPrivate
{
gint width, height;
guint8 conformance_window_flag;
gint crop_rect_width;
gint crop_rect_height;
gint crop_rect_x;
gint crop_rect_y;
guint nal_length_size;
/* state */
GstH265DecoderFormat in_format;
GstH265DecoderAlign align;
GstH265Parser *parser;
GstH265Dpb *dpb;
/* 0: frame or field-pair interlaced stream
* 1: alternating, single field interlaced stream.
* When equal to 1, picture timing SEI shall be present in every AU */
guint8 field_seq_flag;
guint8 progressive_source_flag;
guint8 interlaced_source_flag;
/* Updated/cleared per handle_frame() by using picture timeing SEI */
GstH265SEIPicStructType cur_pic_struct;
guint8 cur_source_scan_type;
guint8 cur_duplicate_flag;
gboolean no_output_of_prior_pics_flag;
/* vps/sps/pps of the current slice */
const GstH265VPS *active_vps;
const GstH265SPS *active_sps;
const GstH265PPS *active_pps;
guint32 SpsMaxLatencyPictures;
/* Picture currently being processed/decoded */
GstH265Picture *current_picture;
GstVideoCodecFrame *current_frame;
/* Slice (slice header + nalu) currently being processed/decoded */
GstH265Slice current_slice;
GstH265Slice prev_slice;
GstH265Slice prev_independent_slice;
gint32 poc; // PicOrderCntVal
gint32 poc_msb; // PicOrderCntMsb
gint32 poc_lsb; // pic_order_cnt_lsb (from slice_header())
gint32 prev_poc_msb; // prevPicOrderCntMsb
gint32 prev_poc_lsb; // prevPicOrderCntLsb
gint32 prev_tid0pic_poc_lsb;
gint32 prev_tid0pic_poc_msb;
gint32 PocStCurrBefore[16];
gint32 PocStCurrAfter[16];
gint32 PocStFoll[16];
gint32 PocLtCurr[16];
gint32 PocLtFoll[16];
/* PicOrderCount of the previously outputted frame */
gint last_output_poc;
gboolean associated_irap_NoRaslOutputFlag;
gboolean new_bitstream;
gboolean prev_nal_is_eos;
/* Reference picture lists, constructed for each slice */
gboolean process_ref_pic_lists;
GArray *ref_pic_list_tmp;
GArray *ref_pic_list0;
GArray *ref_pic_list1;
GArray *nalu;
/* For delayed output */
guint preferred_output_delay;
gboolean is_live;
GstQueueArray *output_queue;
};
typedef struct
{
union
{
GstH265SPS sps;
GstH265Slice slice;
} unit;
gboolean is_slice;
} GstH265DecoderNalUnit;
typedef struct
{
/* Holds ref */
GstVideoCodecFrame *frame;
GstH265Picture *picture;
/* Without ref */
GstH265Decoder *self;
} GstH265DecoderOutputFrame;
#define UPDATE_FLOW_RETURN(ret,new_ret) G_STMT_START { \
if (*(ret) == GST_FLOW_OK) \
*(ret) = new_ret; \
} G_STMT_END
#define parent_class gst_h265_decoder_parent_class
G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GstH265Decoder, gst_h265_decoder,
GST_TYPE_VIDEO_DECODER,
G_ADD_PRIVATE (GstH265Decoder);
GST_DEBUG_CATEGORY_INIT (gst_h265_decoder_debug, "h265decoder", 0,
"H.265 Video Decoder"));
static void gst_h265_decoder_finalize (GObject * object);
static gboolean gst_h265_decoder_start (GstVideoDecoder * decoder);
static gboolean gst_h265_decoder_stop (GstVideoDecoder * decoder);
static gboolean gst_h265_decoder_set_format (GstVideoDecoder * decoder,
GstVideoCodecState * state);
static GstFlowReturn gst_h265_decoder_finish (GstVideoDecoder * decoder);
static gboolean gst_h265_decoder_flush (GstVideoDecoder * decoder);
static GstFlowReturn gst_h265_decoder_drain (GstVideoDecoder * decoder);
static GstFlowReturn gst_h265_decoder_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame);
static void gst_h265_decoder_finish_current_picture (GstH265Decoder * self,
GstFlowReturn * ret);
static void gst_h265_decoder_clear_ref_pic_sets (GstH265Decoder * self);
static void gst_h265_decoder_clear_dpb (GstH265Decoder * self, gboolean flush);
static GstFlowReturn gst_h265_decoder_drain_internal (GstH265Decoder * self);
static GstFlowReturn
gst_h265_decoder_start_current_picture (GstH265Decoder * self);
static void gst_h265_decoder_clear_nalu (GstH265DecoderNalUnit * nalu);
static void
gst_h265_decoder_clear_output_frame (GstH265DecoderOutputFrame * output_frame);
static void
gst_h265_decoder_class_init (GstH265DecoderClass * klass)
{
GstVideoDecoderClass *decoder_class = GST_VIDEO_DECODER_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = GST_DEBUG_FUNCPTR (gst_h265_decoder_finalize);
decoder_class->start = GST_DEBUG_FUNCPTR (gst_h265_decoder_start);
decoder_class->stop = GST_DEBUG_FUNCPTR (gst_h265_decoder_stop);
decoder_class->set_format = GST_DEBUG_FUNCPTR (gst_h265_decoder_set_format);
decoder_class->finish = GST_DEBUG_FUNCPTR (gst_h265_decoder_finish);
decoder_class->flush = GST_DEBUG_FUNCPTR (gst_h265_decoder_flush);
decoder_class->drain = GST_DEBUG_FUNCPTR (gst_h265_decoder_drain);
decoder_class->handle_frame =
GST_DEBUG_FUNCPTR (gst_h265_decoder_handle_frame);
}
static void
gst_h265_decoder_init (GstH265Decoder * self)
{
GstH265DecoderPrivate *priv;
gst_video_decoder_set_packetized (GST_VIDEO_DECODER (self), TRUE);
self->priv = priv = gst_h265_decoder_get_instance_private (self);
priv->last_output_poc = G_MININT32;
priv->ref_pic_list_tmp = g_array_sized_new (FALSE, TRUE,
sizeof (GstH265Picture *), 32);
priv->ref_pic_list0 = g_array_sized_new (FALSE, TRUE,
sizeof (GstH265Picture *), 32);
priv->ref_pic_list1 = g_array_sized_new (FALSE, TRUE,
sizeof (GstH265Picture *), 32);
priv->nalu = g_array_sized_new (FALSE, TRUE, sizeof (GstH265DecoderNalUnit),
8);
g_array_set_clear_func (priv->nalu,
(GDestroyNotify) gst_h265_decoder_clear_nalu);
priv->output_queue =
gst_queue_array_new_for_struct (sizeof (GstH265DecoderOutputFrame), 1);
gst_queue_array_set_clear_func (priv->output_queue,
(GDestroyNotify) gst_h265_decoder_clear_output_frame);
}
static void
gst_h265_decoder_finalize (GObject * object)
{
GstH265Decoder *self = GST_H265_DECODER (object);
GstH265DecoderPrivate *priv = self->priv;
g_array_unref (priv->ref_pic_list_tmp);
g_array_unref (priv->ref_pic_list0);
g_array_unref (priv->ref_pic_list1);
g_array_unref (priv->nalu);
gst_queue_array_free (priv->output_queue);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_h265_decoder_start (GstVideoDecoder * decoder)
{
GstH265Decoder *self = GST_H265_DECODER (decoder);
GstH265DecoderPrivate *priv = self->priv;
priv->parser = gst_h265_parser_new ();
priv->dpb = gst_h265_dpb_new ();
priv->new_bitstream = TRUE;
priv->prev_nal_is_eos = FALSE;
return TRUE;
}
static gboolean
gst_h265_decoder_stop (GstVideoDecoder * decoder)
{
GstH265Decoder *self = GST_H265_DECODER (decoder);
GstH265DecoderPrivate *priv = self->priv;
if (self->input_state) {
gst_video_codec_state_unref (self->input_state);
self->input_state = NULL;
}
if (priv->parser) {
gst_h265_parser_free (priv->parser);
priv->parser = NULL;
}
if (priv->dpb) {
gst_h265_dpb_free (priv->dpb);
priv->dpb = NULL;
}
gst_h265_decoder_clear_ref_pic_sets (self);
return TRUE;
}
static void
gst_h265_decoder_clear_output_frame (GstH265DecoderOutputFrame * output_frame)
{
if (!output_frame)
return;
if (output_frame->frame) {
gst_video_decoder_release_frame (GST_VIDEO_DECODER (output_frame->self),
output_frame->frame);
output_frame->frame = NULL;
}
gst_clear_h265_picture (&output_frame->picture);
}
static gboolean
gst_h265_decoder_is_crop_rect_changed (GstH265Decoder * self, GstH265SPS * sps)
{
GstH265DecoderPrivate *priv = self->priv;
if (priv->conformance_window_flag != sps->conformance_window_flag)
return TRUE;
if (priv->crop_rect_width != sps->crop_rect_width)
return TRUE;
if (priv->crop_rect_height != sps->crop_rect_height)
return TRUE;
if (priv->crop_rect_x != sps->crop_rect_x)
return TRUE;
if (priv->crop_rect_y != sps->crop_rect_y)
return TRUE;
return FALSE;
}
static void
gst_h265_decoder_drain_output_queue (GstH265Decoder * self, guint num,
GstFlowReturn * ret)
{
GstH265DecoderPrivate *priv = self->priv;
GstH265DecoderClass *klass = GST_H265_DECODER_GET_CLASS (self);
g_assert (klass->output_picture);
g_assert (ret != NULL);
while (gst_queue_array_get_length (priv->output_queue) > num) {
GstH265DecoderOutputFrame *output_frame = (GstH265DecoderOutputFrame *)
gst_queue_array_pop_head_struct (priv->output_queue);
GstFlowReturn flow_ret = klass->output_picture (self, output_frame->frame,
output_frame->picture);
UPDATE_FLOW_RETURN (ret, flow_ret);
}
}
static GstFlowReturn
gst_h265_decoder_process_sps (GstH265Decoder * self, GstH265SPS * sps)
{
GstH265DecoderPrivate *priv = self->priv;
gint max_dpb_size;
gint prev_max_dpb_size;
gint MaxLumaPS;
const gint MaxDpbPicBuf = 6;
gint PicSizeInSamplesY;
guint8 field_seq_flag = 0;
guint8 progressive_source_flag = 0;
guint8 interlaced_source_flag = 0;
GstFlowReturn ret = GST_FLOW_OK;
/* A.4.1 */
MaxLumaPS = 35651584;
PicSizeInSamplesY = sps->width * sps->height;
if (PicSizeInSamplesY <= (MaxLumaPS >> 2))
max_dpb_size = MaxDpbPicBuf * 4;
else if (PicSizeInSamplesY <= (MaxLumaPS >> 1))
max_dpb_size = MaxDpbPicBuf * 2;
else if (PicSizeInSamplesY <= ((3 * MaxLumaPS) >> 2))
max_dpb_size = (MaxDpbPicBuf * 4) / 3;
else
max_dpb_size = MaxDpbPicBuf;
max_dpb_size = MIN (max_dpb_size, 16);
if (sps->vui_parameters_present_flag)
field_seq_flag = sps->vui_params.field_seq_flag;
progressive_source_flag = sps->profile_tier_level.progressive_source_flag;
interlaced_source_flag = sps->profile_tier_level.interlaced_source_flag;
prev_max_dpb_size = gst_h265_dpb_get_max_num_pics (priv->dpb);
if (priv->width != sps->width || priv->height != sps->height ||
prev_max_dpb_size != max_dpb_size ||
priv->field_seq_flag != field_seq_flag ||
priv->progressive_source_flag != progressive_source_flag ||
priv->interlaced_source_flag != interlaced_source_flag ||
gst_h265_decoder_is_crop_rect_changed (self, sps)) {
GstH265DecoderClass *klass = GST_H265_DECODER_GET_CLASS (self);
GST_DEBUG_OBJECT (self,
"SPS updated, resolution: %dx%d -> %dx%d, dpb size: %d -> %d, "
"field_seq_flag: %d -> %d, progressive_source_flag: %d -> %d, "
"interlaced_source_flag: %d -> %d",
priv->width, priv->height, sps->width, sps->height,
prev_max_dpb_size, max_dpb_size, priv->field_seq_flag, field_seq_flag,
priv->progressive_source_flag, progressive_source_flag,
priv->interlaced_source_flag, interlaced_source_flag);
if (priv->no_output_of_prior_pics_flag) {
gst_h265_decoder_drain_output_queue (self, 0, &ret);
gst_h265_decoder_clear_dpb (self, FALSE);
} else {
ret = gst_h265_decoder_drain_internal (self);
}
if (ret != GST_FLOW_OK)
return ret;
if (klass->get_preferred_output_delay) {
priv->preferred_output_delay =
klass->get_preferred_output_delay (self, priv->is_live);
} else {
priv->preferred_output_delay = 0;
}
g_assert (klass->new_sequence);
ret = klass->new_sequence (self,
sps, max_dpb_size + priv->preferred_output_delay);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (self, "subclass does not want accept new sequence");
return ret;
}
priv->width = sps->width;
priv->height = sps->height;
priv->conformance_window_flag = sps->conformance_window_flag;
priv->crop_rect_width = sps->crop_rect_width;
priv->crop_rect_height = sps->crop_rect_height;
priv->crop_rect_x = sps->crop_rect_x;
priv->crop_rect_y = sps->crop_rect_y;
priv->field_seq_flag = field_seq_flag;
priv->progressive_source_flag = progressive_source_flag;
priv->interlaced_source_flag = interlaced_source_flag;
gst_h265_dpb_set_max_num_pics (priv->dpb, max_dpb_size);
}
if (sps->max_latency_increase_plus1[sps->max_sub_layers_minus1]) {
priv->SpsMaxLatencyPictures =
sps->max_num_reorder_pics[sps->max_sub_layers_minus1] +
sps->max_latency_increase_plus1[sps->max_sub_layers_minus1] - 1;
}
GST_DEBUG_OBJECT (self, "Set DPB max size %d", max_dpb_size);
return GST_FLOW_OK;
}
static GstH265ParserResult
gst_h265_decoder_parse_sei (GstH265Decoder * self, GstH265NalUnit * nalu)
{
GstH265DecoderPrivate *priv = self->priv;
GstH265ParserResult pres;
GArray *messages = NULL;
guint i;
pres = gst_h265_parser_parse_sei (priv->parser, nalu, &messages);
if (pres != GST_H265_PARSER_OK) {
GST_WARNING_OBJECT (self, "Failed to parse SEI, result %d", pres);
/* XXX: Ignore error from SEI parsing, it might be malformed bitstream,
* or our fault. But shouldn't be critical */
g_clear_pointer (&messages, g_array_unref);
return GST_H265_PARSER_OK;
}
for (i = 0; i < messages->len; i++) {
GstH265SEIMessage *sei = &g_array_index (messages, GstH265SEIMessage, i);
switch (sei->payloadType) {
case GST_H265_SEI_PIC_TIMING:
priv->cur_pic_struct = sei->payload.pic_timing.pic_struct;
priv->cur_source_scan_type = sei->payload.pic_timing.source_scan_type;
priv->cur_duplicate_flag = sei->payload.pic_timing.duplicate_flag;
GST_TRACE_OBJECT (self,
"Picture Timing SEI, pic_struct: %d, source_scan_type: %d, "
"duplicate_flag: %d", priv->cur_pic_struct,
priv->cur_source_scan_type, priv->cur_duplicate_flag);
break;
default:
break;
}
}
g_array_free (messages, TRUE);
GST_LOG_OBJECT (self, "SEI parsed");
return GST_H265_PARSER_OK;
}
static void
gst_h265_decoder_process_ref_pic_lists (GstH265Decoder * self,
GstH265Picture * curr_pic, GstH265Slice * slice,
GArray ** ref_pic_list0, GArray ** ref_pic_list1)
{
GstH265DecoderPrivate *priv = self->priv;
GstH265RefPicListModification *ref_mod =
&slice->header.ref_pic_list_modification;
GstH265PPSSccExtensionParams *scc_ext =
&slice->header.pps->pps_scc_extension_params;
GArray *tmp_refs;
gint num_tmp_refs, i;
*ref_pic_list0 = priv->ref_pic_list0;
*ref_pic_list1 = priv->ref_pic_list1;
/* There is nothing to be done for I slices */
if (GST_H265_IS_I_SLICE (&slice->header))
return;
/* Inifinit loop prevention */
if (self->NumPocStCurrBefore == 0 && self->NumPocStCurrAfter == 0 &&
self->NumPocLtCurr == 0 && !scc_ext->pps_curr_pic_ref_enabled_flag) {
GST_WARNING_OBJECT (self,
"Expected references, got none, preventing infinit loop.");
return;
}
/* 8.3.4 Deriving l0 */
tmp_refs = priv->ref_pic_list_tmp;
/* (8-8)
* Deriving l0 consist of appending in loop RefPicSetStCurrBefore,
* RefPicSetStCurrAfter and RefPicSetLtCurr until NumRpsCurrTempList0 item
* has been reached.
*/
/* NumRpsCurrTempList0 */
num_tmp_refs = MAX (slice->header.num_ref_idx_l0_active_minus1 + 1,
self->NumPicTotalCurr);
while (tmp_refs->len < num_tmp_refs) {
for (i = 0; i < self->NumPocStCurrBefore && tmp_refs->len < num_tmp_refs;
i++)
g_array_append_val (tmp_refs, self->RefPicSetStCurrBefore[i]);
for (i = 0; i < self->NumPocStCurrAfter && tmp_refs->len < num_tmp_refs;
i++)
g_array_append_val (tmp_refs, self->RefPicSetStCurrAfter[i]);
for (i = 0; i < self->NumPocLtCurr && tmp_refs->len < num_tmp_refs; i++)
g_array_append_val (tmp_refs, self->RefPicSetLtCurr[i]);
if (scc_ext->pps_curr_pic_ref_enabled_flag)
g_array_append_val (tmp_refs, curr_pic);
}
/* (8-9)
* If needed, apply the modificaiton base on the lookup table found in the
* slice header (list_entry_l0).
*/
for (i = 0; i <= slice->header.num_ref_idx_l0_active_minus1; i++) {
GstH265Picture **tmp = (GstH265Picture **) tmp_refs->data;
if (ref_mod->ref_pic_list_modification_flag_l0)
g_array_append_val (*ref_pic_list0, tmp[ref_mod->list_entry_l0[i]]);
else
g_array_append_val (*ref_pic_list0, tmp[i]);
}
if (scc_ext->pps_curr_pic_ref_enabled_flag &&
!ref_mod->ref_pic_list_modification_flag_l0 &&
num_tmp_refs > (slice->header.num_ref_idx_l0_active_minus1 + 1)) {
g_array_index (*ref_pic_list0, GstH265Picture *,
slice->header.num_ref_idx_l0_active_minus1) = curr_pic;
}
g_array_set_size (tmp_refs, 0);
/* For P slices we only need l0 */
if (GST_H265_IS_P_SLICE (&slice->header))
return;
/* 8.3.4 Deriving l1 */
/* (8-10)
* Deriving l1 consist of appending in loop RefPicSetStCurrAfter,
* RefPicSetStCurrBefore and RefPicSetLtCurr until NumRpsCurrTempList0 item
* has been reached.
*/
/* NumRpsCurrTempList1 */
num_tmp_refs = MAX (slice->header.num_ref_idx_l1_active_minus1 + 1,
self->NumPicTotalCurr);
while (tmp_refs->len < num_tmp_refs) {
for (i = 0; i < self->NumPocStCurrAfter && tmp_refs->len < num_tmp_refs;
i++)
g_array_append_val (tmp_refs, self->RefPicSetStCurrAfter[i]);
for (i = 0; i < self->NumPocStCurrBefore && tmp_refs->len < num_tmp_refs;
i++)
g_array_append_val (tmp_refs, self->RefPicSetStCurrBefore[i]);
for (i = 0; i < self->NumPocLtCurr && tmp_refs->len < num_tmp_refs; i++)
g_array_append_val (tmp_refs, self->RefPicSetLtCurr[i]);
if (scc_ext->pps_curr_pic_ref_enabled_flag)
g_array_append_val (tmp_refs, curr_pic);
}
/* (8-11)
* If needed, apply the modificaiton base on the lookup table found in the
* slice header (list_entry_l1).
*/
for (i = 0; i <= slice->header.num_ref_idx_l1_active_minus1; i++) {
GstH265Picture **tmp = (GstH265Picture **) tmp_refs->data;
if (ref_mod->ref_pic_list_modification_flag_l1)
g_array_append_val (*ref_pic_list1, tmp[ref_mod->list_entry_l1[i]]);
else
g_array_append_val (*ref_pic_list1, tmp[i]);
}
g_array_set_size (tmp_refs, 0);
}
static GstFlowReturn
gst_h265_decoder_decode_slice (GstH265Decoder * self)
{
GstH265DecoderClass *klass = GST_H265_DECODER_GET_CLASS (self);
GstH265DecoderPrivate *priv = self->priv;
GstH265Slice *slice = &priv->current_slice;
GstH265Picture *picture = priv->current_picture;
GArray *l0 = NULL;
GArray *l1 = NULL;
GstFlowReturn ret = GST_FLOW_OK;
if (!picture) {
GST_ERROR_OBJECT (self, "No current picture");
return GST_FLOW_ERROR;
}
g_assert (klass->decode_slice);
if (priv->process_ref_pic_lists) {
l0 = priv->ref_pic_list0;
l1 = priv->ref_pic_list1;
gst_h265_decoder_process_ref_pic_lists (self, picture, slice, &l0, &l1);
}
ret = klass->decode_slice (self, picture, slice, l0, l1);
if (priv->process_ref_pic_lists) {
g_array_set_size (l0, 0);
g_array_set_size (l1, 0);
}
return ret;
}
static GstFlowReturn
gst_h265_decoder_preprocess_slice (GstH265Decoder * self, GstH265Slice * slice)
{
GstH265DecoderPrivate *priv = self->priv;
const GstH265SliceHdr *slice_hdr = &slice->header;
if (priv->current_picture && slice_hdr->first_slice_segment_in_pic_flag) {
GST_WARNING_OBJECT (self,
"Current picture is not finished but slice header has "
"first_slice_segment_in_pic_flag");
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
}
static GstFlowReturn
gst_h265_decoder_process_slice (GstH265Decoder * self, GstH265Slice * slice)
{
GstH265DecoderPrivate *priv = self->priv;
GstFlowReturn ret = GST_FLOW_OK;
priv->current_slice = *slice;
if (priv->current_slice.header.dependent_slice_segment_flag) {
GstH265SliceHdr *slice_hdr = &priv->current_slice.header;
GstH265SliceHdr *indep_slice_hdr = &priv->prev_independent_slice.header;
memcpy (&slice_hdr->type, &indep_slice_hdr->type,
G_STRUCT_OFFSET (GstH265SliceHdr, num_entry_point_offsets) -
G_STRUCT_OFFSET (GstH265SliceHdr, type));
} else {
priv->prev_independent_slice = priv->current_slice;
memset (&priv->prev_independent_slice.nalu, 0, sizeof (GstH265NalUnit));
}
ret = gst_h265_decoder_preprocess_slice (self, &priv->current_slice);
if (ret != GST_FLOW_OK)
return ret;
priv->active_pps = priv->current_slice.header.pps;
priv->active_sps = priv->active_pps->sps;
if (!priv->current_picture) {
GstH265DecoderClass *klass = GST_H265_DECODER_GET_CLASS (self);
GstH265Picture *picture;
GstFlowReturn ret = GST_FLOW_OK;
g_assert (priv->current_frame);
picture = gst_h265_picture_new ();
/* This allows accessing the frame from the picture. */
picture->system_frame_number = priv->current_frame->system_frame_number;
priv->current_picture = picture;
if (klass->new_picture)
ret = klass->new_picture (self, priv->current_frame, picture);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (self, "subclass does not want accept new picture");
priv->current_picture = NULL;
gst_h265_picture_unref (picture);
return ret;
}
ret = gst_h265_decoder_start_current_picture (self);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (self, "start picture failed");
return ret;
}
/* this picture was dropped */
if (!priv->current_picture)
return GST_FLOW_OK;
}
return gst_h265_decoder_decode_slice (self);
}
static GstH265ParserResult
gst_h265_decoder_parse_slice (GstH265Decoder * self, GstH265NalUnit * nalu)
{
GstH265DecoderPrivate *priv = self->priv;
GstH265ParserResult pres;
GstH265Slice slice;
GstH265DecoderNalUnit decoder_nalu;
memset (&slice, 0, sizeof (GstH265Slice));
pres = gst_h265_parser_parse_slice_hdr (priv->parser, nalu, &slice.header);
if (pres != GST_H265_PARSER_OK)
return pres;
/* NOTE: gst_h265_parser_parse_slice_hdr() allocates array
* GstH265SliceHdr::entry_point_offset_minus1 but we don't use it
* in this h265decoder baseclass at the moment
*/
gst_h265_slice_hdr_free (&priv->current_slice.header);
slice.nalu = *nalu;
if (nalu->type >= GST_H265_NAL_SLICE_BLA_W_LP &&
nalu->type <= GST_H265_NAL_SLICE_CRA_NUT) {
slice.rap_pic_flag = TRUE;
}
/* NoRaslOutputFlag == 1 if the current picture is
* 1) an IDR picture
* 2) a BLA picture
* 3) a CRA picture that is the first access unit in the bitstream
* 4) first picture that follows an end of sequence NAL unit in decoding order
* 5) has HandleCraAsBlaFlag == 1 (set by external means, so not considering )
*/
if (GST_H265_IS_NAL_TYPE_IDR (nalu->type) ||
GST_H265_IS_NAL_TYPE_BLA (nalu->type) ||
(GST_H265_IS_NAL_TYPE_CRA (nalu->type) && priv->new_bitstream) ||
priv->prev_nal_is_eos) {
slice.no_rasl_output_flag = TRUE;
}
if (GST_H265_IS_NAL_TYPE_IRAP (nalu->type)) {
slice.intra_pic_flag = TRUE;
if (slice.no_rasl_output_flag && !priv->new_bitstream) {
/* C 3.2 */
slice.clear_dpb = TRUE;
if (nalu->type == GST_H265_NAL_SLICE_CRA_NUT) {
slice.no_output_of_prior_pics_flag = TRUE;
} else {
slice.no_output_of_prior_pics_flag =
slice.header.no_output_of_prior_pics_flag;
}
}
}
if (slice.no_output_of_prior_pics_flag)
priv->no_output_of_prior_pics_flag = TRUE;
decoder_nalu.unit.slice = slice;
decoder_nalu.is_slice = TRUE;
g_array_append_val (priv->nalu, decoder_nalu);
return GST_H265_PARSER_OK;
}
static GstH265ParserResult
gst_h265_decoder_parse_nalu (GstH265Decoder * self, GstH265NalUnit * nalu)
{
GstH265DecoderPrivate *priv = self->priv;
GstH265VPS vps;
GstH265SPS sps;
GstH265PPS pps;
GstH265ParserResult ret = GST_H265_PARSER_OK;
GstH265DecoderNalUnit decoder_nalu;
GST_LOG_OBJECT (self, "Parsed nal type: %d, offset %d, size %d",
nalu->type, nalu->offset, nalu->size);
switch (nalu->type) {
case GST_H265_NAL_VPS:
ret = gst_h265_parser_parse_vps (priv->parser, nalu, &vps);
break;
case GST_H265_NAL_SPS:
ret = gst_h265_parser_parse_sps (priv->parser, nalu, &sps, TRUE);
if (ret != GST_H265_PARSER_OK)
break;
memset (&decoder_nalu, 0, sizeof (GstH265DecoderNalUnit));
decoder_nalu.unit.sps = sps;
g_array_append_val (priv->nalu, decoder_nalu);
break;
case GST_H265_NAL_PPS:
ret = gst_h265_parser_parse_pps (priv->parser, nalu, &pps);
break;
case GST_H265_NAL_PREFIX_SEI:
case GST_H265_NAL_SUFFIX_SEI:
ret = gst_h265_decoder_parse_sei (self, nalu);
break;
case GST_H265_NAL_SLICE_TRAIL_N:
case GST_H265_NAL_SLICE_TRAIL_R:
case GST_H265_NAL_SLICE_TSA_N:
case GST_H265_NAL_SLICE_TSA_R:
case GST_H265_NAL_SLICE_STSA_N:
case GST_H265_NAL_SLICE_STSA_R:
case GST_H265_NAL_SLICE_RADL_N:
case GST_H265_NAL_SLICE_RADL_R:
case GST_H265_NAL_SLICE_RASL_N:
case GST_H265_NAL_SLICE_RASL_R:
case GST_H265_NAL_SLICE_BLA_W_LP:
case GST_H265_NAL_SLICE_BLA_W_RADL:
case GST_H265_NAL_SLICE_BLA_N_LP:
case GST_H265_NAL_SLICE_IDR_W_RADL:
case GST_H265_NAL_SLICE_IDR_N_LP:
case GST_H265_NAL_SLICE_CRA_NUT:
ret = gst_h265_decoder_parse_slice (self, nalu);
priv->new_bitstream = FALSE;
priv->prev_nal_is_eos = FALSE;
break;
case GST_H265_NAL_EOB:
priv->new_bitstream = TRUE;
break;
case GST_H265_NAL_EOS:
priv->prev_nal_is_eos = TRUE;
break;
default:
break;
}
return ret;
}
static GstFlowReturn
gst_h265_decoder_decode_nalu (GstH265Decoder * self,
GstH265DecoderNalUnit * nalu)
{
if (!nalu->is_slice)
return gst_h265_decoder_process_sps (self, &nalu->unit.sps);
return gst_h265_decoder_process_slice (self, &nalu->unit.slice);
}
static void
gst_h265_decoder_format_from_caps (GstH265Decoder * self, GstCaps * caps,
GstH265DecoderFormat * format, GstH265DecoderAlign * align)
{
if (format)
*format = GST_H265_DECODER_FORMAT_NONE;
if (align)
*align = GST_H265_DECODER_ALIGN_NONE;
if (!gst_caps_is_fixed (caps)) {
GST_WARNING_OBJECT (self, "Caps wasn't fixed");
return;
}
GST_DEBUG_OBJECT (self, "parsing caps: %" GST_PTR_FORMAT, caps);
if (caps && gst_caps_get_size (caps) > 0) {
GstStructure *s = gst_caps_get_structure (caps, 0);
const gchar *str = NULL;
if (format) {
if ((str = gst_structure_get_string (s, "stream-format"))) {
if (strcmp (str, "hvc1") == 0)
*format = GST_H265_DECODER_FORMAT_HVC1;
else if (strcmp (str, "hev1") == 0)
*format = GST_H265_DECODER_FORMAT_HEV1;
else if (strcmp (str, "byte-stream") == 0)
*format = GST_H265_DECODER_FORMAT_BYTE;
}
}
if (align) {
if ((str = gst_structure_get_string (s, "alignment"))) {
if (strcmp (str, "au") == 0)
*align = GST_H265_DECODER_ALIGN_AU;
else if (strcmp (str, "nal") == 0)
*align = GST_H265_DECODER_ALIGN_NAL;
}
}
}
}
static GstFlowReturn
gst_h265_decoder_parse_codec_data (GstH265Decoder * self, const guint8 * data,
gsize size)
{
GstH265DecoderPrivate *priv = self->priv;
guint num_nal_arrays;
guint off;
guint num_nals, i, j;
GstH265ParserResult pres;
GstH265NalUnit nalu;
GstFlowReturn ret = GST_FLOW_OK;
GstH265VPS vps;
GstH265SPS sps;
GstH265PPS pps;
/* parse the hvcC data */
if (size < 23) {
GST_WARNING_OBJECT (self, "hvcC too small");
return GST_FLOW_ERROR;
}
/* wrong hvcC version */
if (data[0] != 0 && data[0] != 1) {
return GST_FLOW_ERROR;
}
priv->nal_length_size = (data[21] & 0x03) + 1;
GST_DEBUG_OBJECT (self, "nal length size %u", priv->nal_length_size);
num_nal_arrays = data[22];
off = 23;
for (i = 0; i < num_nal_arrays; i++) {
if (off + 3 >= size) {
GST_WARNING_OBJECT (self, "hvcC too small");
return GST_FLOW_ERROR;
}
num_nals = GST_READ_UINT16_BE (data + off + 1);
off += 3;
for (j = 0; j < num_nals; j++) {
pres = gst_h265_parser_identify_nalu_hevc (priv->parser,
data, off, size, 2, &nalu);
if (pres != GST_H265_PARSER_OK) {
GST_WARNING_OBJECT (self, "hvcC too small");
return GST_FLOW_ERROR;
}
switch (nalu.type) {
case GST_H265_NAL_VPS:
pres = gst_h265_parser_parse_vps (priv->parser, &nalu, &vps);
if (pres != GST_H265_PARSER_OK) {
GST_WARNING_OBJECT (self, "Failed to parse VPS");
return GST_FLOW_ERROR;
}
break;
case GST_H265_NAL_SPS:
pres = gst_h265_parser_parse_sps (priv->parser, &nalu, &sps, TRUE);
if (pres != GST_H265_PARSER_OK) {
GST_WARNING_OBJECT (self, "Failed to parse SPS");
return GST_FLOW_ERROR;
}
ret = gst_h265_decoder_process_sps (self, &sps);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (self, "Failed to process SPS");
return ret;
}
break;
case GST_H265_NAL_PPS:
pres = gst_h265_parser_parse_pps (priv->parser, &nalu, &pps);
if (pres != GST_H265_PARSER_OK) {
GST_WARNING_OBJECT (self, "Failed to parse PPS");
return GST_FLOW_ERROR;
}
break;
default:
break;
}
off = nalu.offset + nalu.size;
}
}
return GST_FLOW_OK;
}
static gboolean
gst_h265_decoder_set_format (GstVideoDecoder * decoder,
GstVideoCodecState * state)
{
GstH265Decoder *self = GST_H265_DECODER (decoder);
GstH265DecoderPrivate *priv = self->priv;
GstQuery *query;
GST_DEBUG_OBJECT (decoder, "Set format");
if (self->input_state)
gst_video_codec_state_unref (self->input_state);
self->input_state = gst_video_codec_state_ref (state);
priv->is_live = FALSE;
query = gst_query_new_latency ();
if (gst_pad_peer_query (GST_VIDEO_DECODER_SINK_PAD (self), query))
gst_query_parse_latency (query, &priv->is_live, NULL, NULL);
gst_query_unref (query);
if (state->caps) {
GstH265DecoderFormat format;
GstH265DecoderAlign align;
gst_h265_decoder_format_from_caps (self, state->caps, &format, &align);
if (format == GST_H265_DECODER_FORMAT_NONE) {
/* codec_data implies packetized */
if (state->codec_data) {
GST_WARNING_OBJECT (self,
"video/x-h265 caps with codec_data but no stream-format=hev1 or hvc1");
format = GST_H265_DECODER_FORMAT_HEV1;
} else {
/* otherwise assume bytestream input */
GST_WARNING_OBJECT (self,
"video/x-h265 caps without codec_data or stream-format");
format = GST_H265_DECODER_FORMAT_BYTE;
}
}
if (format == GST_H265_DECODER_FORMAT_HEV1 ||
format == GST_H265_DECODER_FORMAT_HVC1) {
if (!state->codec_data) {
/* Try it with size 4 anyway */
priv->nal_length_size = 4;
GST_WARNING_OBJECT (self,
"packetized format without codec data, assuming nal length size is 4");
}
/* AVC implies alignment=au */
if (align == GST_H265_DECODER_ALIGN_NONE)
align = GST_H265_DECODER_ALIGN_AU;
}
if (format == GST_H265_DECODER_FORMAT_BYTE && state->codec_data)
GST_WARNING_OBJECT (self, "bytestream with codec data");
priv->in_format = format;
priv->align = align;
}
if (state->codec_data) {
GstMapInfo map;
gst_buffer_map (state->codec_data, &map, GST_MAP_READ);
if (gst_h265_decoder_parse_codec_data (self, map.data, map.size) !=
GST_FLOW_OK) {
/* keep going without error.
* Probably inband SPS/PPS might be valid data */
GST_WARNING_OBJECT (self, "Failed to handle codec data");
}
gst_buffer_unmap (state->codec_data, &map);
}
return TRUE;
}
static gboolean
gst_h265_decoder_flush (GstVideoDecoder * decoder)
{
GstH265Decoder *self = GST_H265_DECODER (decoder);
gst_h265_decoder_clear_dpb (self, TRUE);
return TRUE;
}
static GstFlowReturn
gst_h265_decoder_drain (GstVideoDecoder * decoder)
{
GstH265Decoder *self = GST_H265_DECODER (decoder);
/* dpb will be cleared by this method */
return gst_h265_decoder_drain_internal (self);
}
static GstFlowReturn
gst_h265_decoder_finish (GstVideoDecoder * decoder)
{
return gst_h265_decoder_drain (decoder);
}
static gboolean
gst_h265_decoder_fill_picture_from_slice (GstH265Decoder * self,
const GstH265Slice * slice, GstH265Picture * picture)
{
GstH265DecoderPrivate *priv = self->priv;
const GstH265SliceHdr *slice_hdr = &slice->header;
const GstH265NalUnit *nalu = &slice->nalu;
picture->RapPicFlag = slice->rap_pic_flag;
picture->NoRaslOutputFlag = slice->no_rasl_output_flag;
picture->IntraPicFlag = slice->intra_pic_flag;
picture->NoOutputOfPriorPicsFlag = slice->no_output_of_prior_pics_flag;
if (picture->IntraPicFlag) {
priv->associated_irap_NoRaslOutputFlag = picture->NoRaslOutputFlag;
}
if (GST_H265_IS_NAL_TYPE_RASL (nalu->type) &&
priv->associated_irap_NoRaslOutputFlag) {
picture->output_flag = FALSE;
} else {
picture->output_flag = slice_hdr->pic_output_flag;
}
return TRUE;
}
#define RSV_VCL_N10 10
#define RSV_VCL_N12 12
#define RSV_VCL_N14 14
static gboolean
nal_is_ref (guint8 nal_type)
{
gboolean ret = FALSE;
switch (nal_type) {
case GST_H265_NAL_SLICE_TRAIL_N:
case GST_H265_NAL_SLICE_TSA_N:
case GST_H265_NAL_SLICE_STSA_N:
case GST_H265_NAL_SLICE_RADL_N:
case GST_H265_NAL_SLICE_RASL_N:
case RSV_VCL_N10:
case RSV_VCL_N12:
case RSV_VCL_N14:
ret = FALSE;
break;
default:
ret = TRUE;
break;
}
return ret;
}
static gboolean
gst_h265_decoder_calculate_poc (GstH265Decoder * self,
const GstH265Slice * slice, GstH265Picture * picture)
{
GstH265DecoderPrivate *priv = self->priv;
const GstH265SliceHdr *slice_hdr = &slice->header;
const GstH265NalUnit *nalu = &slice->nalu;
const GstH265SPS *sps = priv->active_sps;
gint32 MaxPicOrderCntLsb = 1 << (sps->log2_max_pic_order_cnt_lsb_minus4 + 4);
gboolean is_irap;
GST_DEBUG_OBJECT (self, "decode PicOrderCntVal");
priv->prev_poc_lsb = priv->poc_lsb;
priv->prev_poc_msb = priv->poc_msb;
is_irap = GST_H265_IS_NAL_TYPE_IRAP (nalu->type);
if (!(is_irap && picture->NoRaslOutputFlag)) {
priv->prev_poc_lsb = priv->prev_tid0pic_poc_lsb;
priv->prev_poc_msb = priv->prev_tid0pic_poc_msb;
}
/* Finding PicOrderCntMsb */
if (is_irap && picture->NoRaslOutputFlag) {
priv->poc_msb = 0;
} else {
/* (8-1) */
if ((slice_hdr->pic_order_cnt_lsb < priv->prev_poc_lsb) &&
((priv->prev_poc_lsb - slice_hdr->pic_order_cnt_lsb) >=
(MaxPicOrderCntLsb / 2)))
priv->poc_msb = priv->prev_poc_msb + MaxPicOrderCntLsb;
else if ((slice_hdr->pic_order_cnt_lsb > priv->prev_poc_lsb) &&
((slice_hdr->pic_order_cnt_lsb - priv->prev_poc_lsb) >
(MaxPicOrderCntLsb / 2)))
priv->poc_msb = priv->prev_poc_msb - MaxPicOrderCntLsb;
else
priv->poc_msb = priv->prev_poc_msb;
}
/* (8-2) */
priv->poc = picture->pic_order_cnt =
priv->poc_msb + slice_hdr->pic_order_cnt_lsb;
priv->poc_lsb = picture->pic_order_cnt_lsb = slice_hdr->pic_order_cnt_lsb;
if (GST_H265_IS_NAL_TYPE_IDR (nalu->type)) {
picture->pic_order_cnt = 0;
picture->pic_order_cnt_lsb = 0;
priv->poc_lsb = 0;
priv->poc_msb = 0;
priv->prev_poc_lsb = 0;
priv->prev_poc_msb = 0;
priv->prev_tid0pic_poc_lsb = 0;
priv->prev_tid0pic_poc_msb = 0;
}
GST_DEBUG_OBJECT (self,
"PicOrderCntVal %d, (lsb %d)", picture->pic_order_cnt,
picture->pic_order_cnt_lsb);
if (nalu->temporal_id_plus1 == 1 && !GST_H265_IS_NAL_TYPE_RASL (nalu->type) &&
!GST_H265_IS_NAL_TYPE_RADL (nalu->type) && nal_is_ref (nalu->type)) {
priv->prev_tid0pic_poc_lsb = slice_hdr->pic_order_cnt_lsb;
priv->prev_tid0pic_poc_msb = priv->poc_msb;
}
return TRUE;
}
static gboolean
gst_h265_decoder_set_buffer_flags (GstH265Decoder * self,
GstH265Picture * picture)
{
GstH265DecoderPrivate *priv = self->priv;
switch (picture->pic_struct) {
case GST_H265_SEI_PIC_STRUCT_FRAME:
break;
case GST_H265_SEI_PIC_STRUCT_TOP_FIELD:
case GST_H265_SEI_PIC_STRUCT_TOP_PAIRED_PREVIOUS_BOTTOM:
case GST_H265_SEI_PIC_STRUCT_TOP_PAIRED_NEXT_BOTTOM:
if (!priv->field_seq_flag) {
GST_FIXME_OBJECT (self,
"top-field with field_seq_flag == 0, what does it mean?");
} else {
picture->buffer_flags = GST_VIDEO_BUFFER_FLAG_TOP_FIELD;
}
break;
case GST_H265_SEI_PIC_STRUCT_BOTTOM_FIELD:
case GST_H265_SEI_PIC_STRUCT_BOTTOM_PAIRED_PREVIOUS_TOP:
case GST_H265_SEI_PIC_STRUCT_BOTTOM_PAIRED_NEXT_TOP:
if (!priv->field_seq_flag) {
GST_FIXME_OBJECT (self,
"bottom-field with field_seq_flag == 0, what does it mean?");
} else {
picture->buffer_flags = GST_VIDEO_BUFFER_FLAG_BOTTOM_FIELD;
}
break;
case GST_H265_SEI_PIC_STRUCT_TOP_BOTTOM:
if (priv->field_seq_flag) {
GST_FIXME_OBJECT (self,
"TFF with field_seq_flag == 1, what does it mean?");
} else {
picture->buffer_flags =
GST_VIDEO_BUFFER_FLAG_INTERLACED | GST_VIDEO_BUFFER_FLAG_TFF;
}
break;
case GST_H265_SEI_PIC_STRUCT_BOTTOM_TOP:
if (priv->field_seq_flag) {
GST_FIXME_OBJECT (self,
"BFF with field_seq_flag == 1, what does it mean?");
} else {
picture->buffer_flags = GST_VIDEO_BUFFER_FLAG_INTERLACED;
}
break;
default:
GST_FIXME_OBJECT (self, "Unhandled picture time SEI pic_struct %d",
picture->pic_struct);
break;
}
return TRUE;
}
static gboolean
gst_h265_decoder_init_current_picture (GstH265Decoder * self)
{
GstH265DecoderPrivate *priv = self->priv;
if (!gst_h265_decoder_fill_picture_from_slice (self, &priv->current_slice,
priv->current_picture)) {
return FALSE;
}
if (!gst_h265_decoder_calculate_poc (self,
&priv->current_slice, priv->current_picture))
return FALSE;
/* Use picture struct parsed from picture timing SEI */
priv->current_picture->pic_struct = priv->cur_pic_struct;
priv->current_picture->source_scan_type = priv->cur_source_scan_type;
priv->current_picture->duplicate_flag = priv->cur_duplicate_flag;
gst_h265_decoder_set_buffer_flags (self, priv->current_picture);
return TRUE;
}
static gboolean
has_entry_in_rps (GstH265Picture * dpb_pic,
GstH265Picture ** rps_list, guint rps_list_length)
{
guint i;
if (!dpb_pic || !rps_list || !rps_list_length)
return FALSE;
for (i = 0; i < rps_list_length; i++) {
if (rps_list[i] && rps_list[i]->pic_order_cnt == dpb_pic->pic_order_cnt)
return TRUE;
}
return FALSE;
}
static void
gst_h265_decoder_clear_ref_pic_sets (GstH265Decoder * self)
{
guint i;
for (i = 0; i < 16; i++) {
gst_h265_picture_replace (&self->RefPicSetLtCurr[i], NULL);
gst_h265_picture_replace (&self->RefPicSetLtFoll[i], NULL);
gst_h265_picture_replace (&self->RefPicSetStCurrBefore[i], NULL);
gst_h265_picture_replace (&self->RefPicSetStCurrAfter[i], NULL);
gst_h265_picture_replace (&self->RefPicSetStFoll[i], NULL);
}
}
static void
gst_h265_decoder_derive_and_mark_rps (GstH265Decoder * self,
GstH265Picture * picture, gint32 * CurrDeltaPocMsbPresentFlag,
gint32 * FollDeltaPocMsbPresentFlag)
{
GstH265DecoderPrivate *priv = self->priv;
guint i;
GArray *dpb_array;
gst_h265_decoder_clear_ref_pic_sets (self);
/* (8-6) */
for (i = 0; i < self->NumPocLtCurr; i++) {
if (!CurrDeltaPocMsbPresentFlag[i]) {
self->RefPicSetLtCurr[i] =
gst_h265_dpb_get_ref_by_poc_lsb (priv->dpb, priv->PocLtCurr[i]);
} else {
self->RefPicSetLtCurr[i] =
gst_h265_dpb_get_ref_by_poc (priv->dpb, priv->PocLtCurr[i]);
}
}
for (i = 0; i < self->NumPocLtFoll; i++) {
if (!FollDeltaPocMsbPresentFlag[i]) {
self->RefPicSetLtFoll[i] =
gst_h265_dpb_get_ref_by_poc_lsb (priv->dpb, priv->PocLtFoll[i]);
} else {
self->RefPicSetLtFoll[i] =
gst_h265_dpb_get_ref_by_poc (priv->dpb, priv->PocLtFoll[i]);
}
}
/* Mark all ref pics in RefPicSetLtCurr and RefPicSetLtFol as long_term_refs */
for (i = 0; i < self->NumPocLtCurr; i++) {
if (self->RefPicSetLtCurr[i]) {
self->RefPicSetLtCurr[i]->ref = TRUE;
self->RefPicSetLtCurr[i]->long_term = TRUE;
}
}
for (i = 0; i < self->NumPocLtFoll; i++) {
if (self->RefPicSetLtFoll[i]) {
self->RefPicSetLtFoll[i]->ref = TRUE;
self->RefPicSetLtFoll[i]->long_term = TRUE;
}
}
/* (8-7) */
for (i = 0; i < self->NumPocStCurrBefore; i++) {
self->RefPicSetStCurrBefore[i] =
gst_h265_dpb_get_short_ref_by_poc (priv->dpb, priv->PocStCurrBefore[i]);
}
for (i = 0; i < self->NumPocStCurrAfter; i++) {
self->RefPicSetStCurrAfter[i] =
gst_h265_dpb_get_short_ref_by_poc (priv->dpb, priv->PocStCurrAfter[i]);
}
for (i = 0; i < self->NumPocStFoll; i++) {
self->RefPicSetStFoll[i] =
gst_h265_dpb_get_short_ref_by_poc (priv->dpb, priv->PocStFoll[i]);
}
/* Mark all dpb pics not beloging to RefPicSet*[] as unused for ref */
dpb_array = gst_h265_dpb_get_pictures_all (priv->dpb);
for (i = 0; i < dpb_array->len; i++) {
GstH265Picture *dpb_pic = g_array_index (dpb_array, GstH265Picture *, i);
if (dpb_pic &&
!has_entry_in_rps (dpb_pic, self->RefPicSetLtCurr, self->NumPocLtCurr)
&& !has_entry_in_rps (dpb_pic, self->RefPicSetLtFoll,
self->NumPocLtFoll)
&& !has_entry_in_rps (dpb_pic, self->RefPicSetStCurrAfter,
self->NumPocStCurrAfter)
&& !has_entry_in_rps (dpb_pic, self->RefPicSetStCurrBefore,
self->NumPocStCurrBefore)
&& !has_entry_in_rps (dpb_pic, self->RefPicSetStFoll,
self->NumPocStFoll)) {
GST_LOG_OBJECT (self, "Mark Picture %p (poc %d) as non-ref", dpb_pic,
dpb_pic->pic_order_cnt);
dpb_pic->ref = FALSE;
dpb_pic->long_term = FALSE;
}
}
g_array_unref (dpb_array);
}
static gboolean
gst_h265_decoder_prepare_rps (GstH265Decoder * self, const GstH265Slice * slice,
GstH265Picture * picture)
{
GstH265DecoderPrivate *priv = self->priv;
gint32 CurrDeltaPocMsbPresentFlag[16] = { 0, };
gint32 FollDeltaPocMsbPresentFlag[16] = { 0, };
const GstH265SliceHdr *slice_hdr = &slice->header;
const GstH265NalUnit *nalu = &slice->nalu;
const GstH265SPS *sps = priv->active_sps;
guint32 MaxPicOrderCntLsb = 1 << (sps->log2_max_pic_order_cnt_lsb_minus4 + 4);
gint i, j, k;
/* if it is an irap pic, set all ref pics in dpb as unused for ref */
if (GST_H265_IS_NAL_TYPE_IRAP (nalu->type) && picture->NoRaslOutputFlag) {
GST_DEBUG_OBJECT (self, "Mark all pictures in DPB as non-ref");
gst_h265_dpb_mark_all_non_ref (priv->dpb);
}
/* Reset everything for IDR */
if (GST_H265_IS_NAL_TYPE_IDR (nalu->type)) {
memset (priv->PocStCurrBefore, 0, sizeof (priv->PocStCurrBefore));
memset (priv->PocStCurrAfter, 0, sizeof (priv->PocStCurrAfter));
memset (priv->PocStFoll, 0, sizeof (priv->PocStFoll));
memset (priv->PocLtCurr, 0, sizeof (priv->PocLtCurr));
memset (priv->PocLtFoll, 0, sizeof (priv->PocLtFoll));
self->NumPocStCurrBefore = self->NumPocStCurrAfter = self->NumPocStFoll = 0;
self->NumPocLtCurr = self->NumPocLtFoll = 0;
} else {
const GstH265ShortTermRefPicSet *stRefPic = NULL;
gint32 num_lt_pics, pocLt;
gint32 PocLsbLt[16] = { 0, };
gint32 UsedByCurrPicLt[16] = { 0, };
gint32 DeltaPocMsbCycleLt[16] = { 0, };
gint numtotalcurr = 0;
/* this is based on CurrRpsIdx described in spec */
if (!slice_hdr->short_term_ref_pic_set_sps_flag)
stRefPic = &slice_hdr->short_term_ref_pic_sets;
else if (sps->num_short_term_ref_pic_sets)
stRefPic =
&sps->short_term_ref_pic_set[slice_hdr->short_term_ref_pic_set_idx];
g_assert (stRefPic != NULL);
GST_LOG_OBJECT (self,
"NumDeltaPocs: %d, NumNegativePics: %d, NumPositivePics %d",
stRefPic->NumDeltaPocs, stRefPic->NumNegativePics,
stRefPic->NumPositivePics);
for (i = 0, j = 0, k = 0; i < stRefPic->NumNegativePics; i++) {
if (stRefPic->UsedByCurrPicS0[i]) {
priv->PocStCurrBefore[j++] =
picture->pic_order_cnt + stRefPic->DeltaPocS0[i];
numtotalcurr++;
} else
priv->PocStFoll[k++] = picture->pic_order_cnt + stRefPic->DeltaPocS0[i];
}
self->NumPocStCurrBefore = j;
for (i = 0, j = 0; i < stRefPic->NumPositivePics; i++) {
if (stRefPic->UsedByCurrPicS1[i]) {
priv->PocStCurrAfter[j++] =
picture->pic_order_cnt + stRefPic->DeltaPocS1[i];
numtotalcurr++;
} else
priv->PocStFoll[k++] = picture->pic_order_cnt + stRefPic->DeltaPocS1[i];
}
self->NumPocStCurrAfter = j;
self->NumPocStFoll = k;
num_lt_pics = slice_hdr->num_long_term_sps + slice_hdr->num_long_term_pics;
/* The variables PocLsbLt[i] and UsedByCurrPicLt[i] are derived as follows: */
for (i = 0; i < num_lt_pics; i++) {
if (i < slice_hdr->num_long_term_sps) {
PocLsbLt[i] = sps->lt_ref_pic_poc_lsb_sps[slice_hdr->lt_idx_sps[i]];
UsedByCurrPicLt[i] =
sps->used_by_curr_pic_lt_sps_flag[slice_hdr->lt_idx_sps[i]];
} else {
PocLsbLt[i] = slice_hdr->poc_lsb_lt[i];
UsedByCurrPicLt[i] = slice_hdr->used_by_curr_pic_lt_flag[i];
}
if (UsedByCurrPicLt[i])
numtotalcurr++;
}
self->NumPicTotalCurr = numtotalcurr;
/* The variable DeltaPocMsbCycleLt[i] is derived as follows: (7-38) */
for (i = 0; i < num_lt_pics; i++) {
if (i == 0 || i == slice_hdr->num_long_term_sps)
DeltaPocMsbCycleLt[i] = slice_hdr->delta_poc_msb_cycle_lt[i];
else
DeltaPocMsbCycleLt[i] =
slice_hdr->delta_poc_msb_cycle_lt[i] + DeltaPocMsbCycleLt[i - 1];
}
/* (8-5) */
for (i = 0, j = 0, k = 0; i < num_lt_pics; i++) {
pocLt = PocLsbLt[i];
if (slice_hdr->delta_poc_msb_present_flag[i])
pocLt +=
picture->pic_order_cnt - DeltaPocMsbCycleLt[i] * MaxPicOrderCntLsb -
slice_hdr->pic_order_cnt_lsb;
if (UsedByCurrPicLt[i]) {
priv->PocLtCurr[j] = pocLt;
CurrDeltaPocMsbPresentFlag[j++] =
slice_hdr->delta_poc_msb_present_flag[i];
} else {
priv->PocLtFoll[k] = pocLt;
FollDeltaPocMsbPresentFlag[k++] =
slice_hdr->delta_poc_msb_present_flag[i];
}
}
self->NumPocLtCurr = j;
self->NumPocLtFoll = k;
}
GST_LOG_OBJECT (self, "NumPocStCurrBefore: %d", self->NumPocStCurrBefore);
GST_LOG_OBJECT (self, "NumPocStCurrAfter: %d", self->NumPocStCurrAfter);
GST_LOG_OBJECT (self, "NumPocStFoll: %d", self->NumPocStFoll);
GST_LOG_OBJECT (self, "NumPocLtCurr: %d", self->NumPocLtCurr);
GST_LOG_OBJECT (self, "NumPocLtFoll: %d", self->NumPocLtFoll);
GST_LOG_OBJECT (self, "NumPicTotalCurr: %d", self->NumPicTotalCurr);
/* the derivation process for the RPS and the picture marking */
gst_h265_decoder_derive_and_mark_rps (self, picture,
CurrDeltaPocMsbPresentFlag, FollDeltaPocMsbPresentFlag);
return TRUE;
}
static void
gst_h265_decoder_do_output_picture (GstH265Decoder * self,
GstH265Picture * picture, GstFlowReturn * ret)
{
GstH265DecoderPrivate *priv = self->priv;
GstVideoCodecFrame *frame = NULL;
GstH265DecoderOutputFrame output_frame;
GstFlowReturn flow_ret = GST_FLOW_OK;
g_assert (ret != NULL);
GST_LOG_OBJECT (self, "Output picture %p (poc %d)", picture,
picture->pic_order_cnt);
if (picture->pic_order_cnt < priv->last_output_poc) {
GST_WARNING_OBJECT (self,
"Outputting out of order %d -> %d, likely a broken stream",
priv->last_output_poc, picture->pic_order_cnt);
}
priv->last_output_poc = picture->pic_order_cnt;
frame = gst_video_decoder_get_frame (GST_VIDEO_DECODER (self),
picture->system_frame_number);
if (!frame) {
GST_ERROR_OBJECT (self,
"No available codec frame with frame number %d",
picture->system_frame_number);
UPDATE_FLOW_RETURN (ret, GST_FLOW_ERROR);
gst_h265_picture_unref (picture);
return;
}
output_frame.frame = frame;
output_frame.picture = picture;
output_frame.self = self;
gst_queue_array_push_tail_struct (priv->output_queue, &output_frame);
gst_h265_decoder_drain_output_queue (self, priv->preferred_output_delay,
&flow_ret);
UPDATE_FLOW_RETURN (ret, flow_ret);
}
static void
gst_h265_decoder_clear_dpb (GstH265Decoder * self, gboolean flush)
{
GstVideoDecoder *decoder = GST_VIDEO_DECODER (self);
GstH265DecoderPrivate *priv = self->priv;
GstH265Picture *picture;
/* If we are not flushing now, videodecoder baseclass will hold
* GstVideoCodecFrame. Release frames manually */
if (!flush) {
while ((picture = gst_h265_dpb_bump (priv->dpb, TRUE)) != NULL) {
GstVideoCodecFrame *frame = gst_video_decoder_get_frame (decoder,
picture->system_frame_number);
if (frame)
gst_video_decoder_release_frame (decoder, frame);
gst_h265_picture_unref (picture);
}
}
gst_queue_array_clear (priv->output_queue);
gst_h265_dpb_clear (priv->dpb);
priv->last_output_poc = G_MININT32;
}
static GstFlowReturn
gst_h265_decoder_drain_internal (GstH265Decoder * self)
{
GstH265DecoderPrivate *priv = self->priv;
GstH265Picture *picture;
GstFlowReturn ret = GST_FLOW_OK;
while ((picture = gst_h265_dpb_bump (priv->dpb, TRUE)) != NULL)
gst_h265_decoder_do_output_picture (self, picture, &ret);
gst_h265_decoder_drain_output_queue (self, 0, &ret);
gst_h265_dpb_clear (priv->dpb);
priv->last_output_poc = G_MININT32;
return ret;
}
/* C.5.2.2 */
static GstFlowReturn
gst_h265_decoder_dpb_init (GstH265Decoder * self, const GstH265Slice * slice,
GstH265Picture * picture)
{
GstH265DecoderPrivate *priv = self->priv;
const GstH265SPS *sps = priv->active_sps;
GstH265Picture *to_output;
GstFlowReturn ret = GST_FLOW_OK;
/* C 3.2 */
if (slice->clear_dpb) {
if (picture->NoOutputOfPriorPicsFlag) {
GST_DEBUG_OBJECT (self, "Clear dpb");
gst_h265_decoder_drain_output_queue (self, 0, &ret);
gst_h265_decoder_clear_dpb (self, FALSE);
} else {
gst_h265_dpb_delete_unused (priv->dpb);
while ((to_output = gst_h265_dpb_bump (priv->dpb, FALSE)) != NULL)
gst_h265_decoder_do_output_picture (self, to_output, &ret);
if (gst_h265_dpb_get_size (priv->dpb) > 0) {
GST_WARNING_OBJECT (self, "IDR or BLA frame failed to clear the dpb, "
"there are still %d pictures in the dpb, last output poc is %d",
gst_h265_dpb_get_size (priv->dpb), priv->last_output_poc);
} else {
priv->last_output_poc = G_MININT32;
}
}
} else {
gst_h265_dpb_delete_unused (priv->dpb);
while (gst_h265_dpb_needs_bump (priv->dpb,
sps->max_num_reorder_pics[sps->max_sub_layers_minus1],
priv->SpsMaxLatencyPictures,
sps->max_dec_pic_buffering_minus1[sps->max_sub_layers_minus1] +
1)) {
to_output = gst_h265_dpb_bump (priv->dpb, FALSE);
/* Something wrong... */
if (!to_output) {
GST_WARNING_OBJECT (self, "Bumping is needed but no picture to output");
break;
}
gst_h265_decoder_do_output_picture (self, to_output, &ret);
}
}
return ret;
}
static GstFlowReturn
gst_h265_decoder_start_current_picture (GstH265Decoder * self)
{
GstH265DecoderClass *klass;
GstH265DecoderPrivate *priv = self->priv;
GstFlowReturn ret = GST_FLOW_OK;
g_assert (priv->current_picture != NULL);
g_assert (priv->active_sps != NULL);
g_assert (priv->active_pps != NULL);
if (!gst_h265_decoder_init_current_picture (self))
return GST_FLOW_ERROR;
/* Drop all RASL pictures having NoRaslOutputFlag is TRUE for the
* associated IRAP picture */
if (GST_H265_IS_NAL_TYPE_RASL (priv->current_slice.nalu.type) &&
priv->associated_irap_NoRaslOutputFlag) {
GST_DEBUG_OBJECT (self, "Drop current picture");
gst_h265_picture_replace (&priv->current_picture, NULL);
return GST_FLOW_OK;
}
gst_h265_decoder_prepare_rps (self, &priv->current_slice,
priv->current_picture);
ret = gst_h265_decoder_dpb_init (self,
&priv->current_slice, priv->current_picture);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (self, "Failed to init dpb");
return ret;
}
klass = GST_H265_DECODER_GET_CLASS (self);
if (klass->start_picture) {
ret = klass->start_picture (self, priv->current_picture,
&priv->current_slice, priv->dpb);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (self, "subclass does not want to start picture");
return ret;
}
}
return GST_FLOW_OK;
}
static void
gst_h265_decoder_finish_picture (GstH265Decoder * self,
GstH265Picture * picture, GstFlowReturn * ret)
{
GstVideoDecoder *decoder = GST_VIDEO_DECODER (self);
GstH265DecoderPrivate *priv = self->priv;
const GstH265SPS *sps = priv->active_sps;
g_assert (ret != NULL);
GST_LOG_OBJECT (self,
"Finishing picture %p (poc %d), entries in DPB %d",
picture, picture->pic_order_cnt, gst_h265_dpb_get_size (priv->dpb));
gst_h265_dpb_delete_unused (priv->dpb);
/* This picture is decode only, drop corresponding frame */
if (!picture->output_flag) {
GstVideoCodecFrame *frame = gst_video_decoder_get_frame (decoder,
picture->system_frame_number);
gst_video_decoder_release_frame (decoder, frame);
}
/* gst_h265_dpb_add() will take care of pic_latency_cnt increment and
* reference picture marking for this picture */
gst_h265_dpb_add (priv->dpb, picture);
/* NOTE: As per C.5.2.2, bumping by sps_max_dec_pic_buffering_minus1 is
* applied only for the output and removal of pictures from the DPB before
* the decoding of the current picture. So pass zero here */
while (gst_h265_dpb_needs_bump (priv->dpb,
sps->max_num_reorder_pics[sps->max_sub_layers_minus1],
priv->SpsMaxLatencyPictures, 0)) {
GstH265Picture *to_output = gst_h265_dpb_bump (priv->dpb, FALSE);
/* Something wrong... */
if (!to_output) {
GST_WARNING_OBJECT (self, "Bumping is needed but no picture to output");
break;
}
gst_h265_decoder_do_output_picture (self, to_output, ret);
}
}
static void
gst_h265_decoder_finish_current_picture (GstH265Decoder * self,
GstFlowReturn * ret)
{
GstH265DecoderPrivate *priv = self->priv;
GstH265DecoderClass *klass;
GstFlowReturn flow_ret = GST_FLOW_OK;
g_assert (ret != NULL);
if (!priv->current_picture)
return;
klass = GST_H265_DECODER_GET_CLASS (self);
if (klass->end_picture) {
flow_ret = klass->end_picture (self, priv->current_picture);
if (flow_ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (self, "End picture failed");
/* continue to empty dpb */
UPDATE_FLOW_RETURN (ret, flow_ret);
}
}
/* finish picture takes ownership of the picture */
gst_h265_decoder_finish_picture (self, priv->current_picture, &flow_ret);
priv->current_picture = NULL;
UPDATE_FLOW_RETURN (ret, flow_ret);
}
static void
gst_h265_decoder_reset_frame_state (GstH265Decoder * self)
{
GstH265DecoderPrivate *priv = self->priv;
/* Clear picture struct information */
priv->cur_pic_struct = GST_H265_SEI_PIC_STRUCT_FRAME;
priv->cur_source_scan_type = 2;
priv->cur_duplicate_flag = 0;
priv->no_output_of_prior_pics_flag = FALSE;
priv->current_frame = NULL;
g_array_set_size (priv->nalu, 0);
}
static GstFlowReturn
gst_h265_decoder_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame)
{
GstH265Decoder *self = GST_H265_DECODER (decoder);
GstH265DecoderPrivate *priv = self->priv;
GstBuffer *in_buf = frame->input_buffer;
GstH265NalUnit nalu;
GstH265ParserResult pres;
GstMapInfo map;
GstFlowReturn decode_ret = GST_FLOW_OK;
guint i;
GST_LOG_OBJECT (self,
"handle frame, PTS: %" GST_TIME_FORMAT ", DTS: %"
GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_PTS (in_buf)),
GST_TIME_ARGS (GST_BUFFER_DTS (in_buf)));
gst_h265_decoder_reset_frame_state (self);
priv->current_frame = frame;
if (!gst_buffer_map (in_buf, &map, GST_MAP_READ)) {
GST_ELEMENT_ERROR (self, RESOURCE, READ,
("Failed to map memory for reading"), (NULL));
return GST_FLOW_ERROR;
}
if (priv->in_format == GST_H265_DECODER_FORMAT_HVC1 ||
priv->in_format == GST_H265_DECODER_FORMAT_HEV1) {
pres = gst_h265_parser_identify_nalu_hevc (priv->parser,
map.data, 0, map.size, priv->nal_length_size, &nalu);
while (pres == GST_H265_PARSER_OK) {
pres = gst_h265_decoder_parse_nalu (self, &nalu);
if (pres != GST_H265_PARSER_OK)
break;
pres = gst_h265_parser_identify_nalu_hevc (priv->parser,
map.data, nalu.offset + nalu.size, map.size, priv->nal_length_size,
&nalu);
}
} else {
pres = gst_h265_parser_identify_nalu (priv->parser,
map.data, 0, map.size, &nalu);
if (pres == GST_H265_PARSER_NO_NAL_END)
pres = GST_H265_PARSER_OK;
while (pres == GST_H265_PARSER_OK) {
pres = gst_h265_decoder_parse_nalu (self, &nalu);
if (pres != GST_H265_PARSER_OK)
break;
pres = gst_h265_parser_identify_nalu (priv->parser,
map.data, nalu.offset + nalu.size, map.size, &nalu);
if (pres == GST_H265_PARSER_NO_NAL_END)
pres = GST_H265_PARSER_OK;
}
}
for (i = 0; i < priv->nalu->len && decode_ret == GST_FLOW_OK; i++) {
GstH265DecoderNalUnit *decoder_nalu =
&g_array_index (priv->nalu, GstH265DecoderNalUnit, i);
decode_ret = gst_h265_decoder_decode_nalu (self, decoder_nalu);
}
gst_buffer_unmap (in_buf, &map);
gst_h265_decoder_reset_frame_state (self);
if (decode_ret != GST_FLOW_OK) {
if (decode_ret == GST_FLOW_ERROR) {
GST_VIDEO_DECODER_ERROR (self, 1, STREAM, DECODE,
("Failed to decode data"), (NULL), decode_ret);
}
gst_video_decoder_drop_frame (decoder, frame);
gst_clear_h265_picture (&priv->current_picture);
return decode_ret;
}
if (priv->current_picture) {
gst_h265_decoder_finish_current_picture (self, &decode_ret);
gst_video_codec_frame_unref (frame);
} else {
/* This picture was dropped */
gst_video_decoder_release_frame (decoder, frame);
}
if (decode_ret == GST_FLOW_ERROR) {
GST_VIDEO_DECODER_ERROR (self, 1, STREAM, DECODE,
("Failed to decode data"), (NULL), decode_ret);
}
return decode_ret;
}
static void
gst_h265_decoder_clear_nalu (GstH265DecoderNalUnit * nalu)
{
if (!nalu)
return;
memset (nalu, 0, sizeof (GstH265DecoderNalUnit));
}
/**
* gst_h265_decoder_set_process_ref_pic_lists:
* @decoder: a #GstH265Decoder
* @process: whether subclass is requiring reference picture modification process
*
* Called to en/disable reference picture modification process.
*
* Since: 1.20
*/
void
gst_h265_decoder_set_process_ref_pic_lists (GstH265Decoder * decoder,
gboolean process)
{
decoder->priv->process_ref_pic_lists = process;
}
/**
* gst_h265_decoder_get_picture:
* @decoder: a #GstH265Decoder
* @system_frame_number: a target system frame number of #GstH265Picture
*
* Retrive DPB and return a #GstH265Picture corresponding to
* the @system_frame_number
*
* Returns: (transfer full): a #GstH265Picture if successful, or %NULL otherwise
*
* Since: 1.20
*/
GstH265Picture *
gst_h265_decoder_get_picture (GstH265Decoder * decoder,
guint32 system_frame_number)
{
return gst_h265_dpb_get_picture (decoder->priv->dpb, system_frame_number);
}
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