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gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth265decoder.c
Seungha Yang 8d40531f23 h265decoder: Improve robustness against malformed NAL packets 
Use newly added gst_h265_parser_identify_and_split_nalu_hevc()
method to handle broken streams where packetized NAL unit
contain start code prefix in it.

It's obviously wrong stream but we know how to work around it
and even need to support such broken streams since
stateless decoder implementations are being a primary
decoder element.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2394>
2022-05-10 03:59:47 +09:00

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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;
/* Split packetized data into actual nal chunks (for malformed stream) */
GArray *split_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);
priv->split_nalu = g_array_new (FALSE, FALSE, sizeof (GstH265NalUnit));
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);
g_array_unref (priv->split_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) {
guint offset = 0;
gsize consumed;
do {
pres = gst_h265_parser_identify_and_split_nalu_hevc (priv->parser,
map.data, offset, map.size, priv->nal_length_size, priv->split_nalu,
&consumed);
if (pres != GST_H265_PARSER_OK)
break;
for (i = 0; i < priv->split_nalu->len; i++) {
GstH265NalUnit *nl =
&g_array_index (priv->split_nalu, GstH265NalUnit, i);
pres = gst_h265_decoder_parse_nalu (self, nl);
if (pres != GST_H265_PARSER_OK)
break;
}
if (pres != GST_H265_PARSER_OK)
break;
offset += consumed;
} while (pres == GST_H265_PARSER_OK);
} 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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