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gstreamer/sys/d3d11/gsth265decoder.c
Seungha Yang a39a5bf131 d3d11decoder: Refactor decoding process 
* Move decoding process to handle_frame
* Remove GstVideoDecoder::parse implementation
* Clarify flush/drain/finish usage

In forward playback case, have_frame() call will be followed by
handle_frame() but reverse playback is not the case.
To ensure GstVideoCodecFrame, the decoding process should be placed inside
of handle_frame(), instead of parse().

Since we don't support alignment=nal, the parse() implementation is not worth.
In order to fix broken reverse playback, let's remove the parse()
implementation and revisit it when adding alignment=nal support.
2020-02-12 12:34:58 +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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "gsth265decoder.h"
GST_DEBUG_CATEGORY_EXTERN (gst_d3d11_h265_dec_debug);
#define GST_CAT_DEFAULT gst_d3d11_h265_dec_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;
/* input codec_data, if any */
GstBuffer *codec_data;
guint nal_length_size;
/* state */
GstH265DecoderFormat in_format;
GstH265DecoderAlign align;
GstH265Parser *parser;
GstH265Dpb *dpb;
GstFlowReturn last_ret;
/* vps/sps/pps of the current slice */
const GstH265VPS *active_vps;
const GstH265SPS *active_sps;
const GstH265PPS *active_pps;
guint32 SpsMaxLatencyPictures;
gint32 WpOffsetHalfRangeC;
/* Picture currently being processed/decoded */
GstH265Picture *current_picture;
GstVideoCodecFrame *current_frame;
/* Slice (slice header + nalu) currently being processed/decodec */
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;
};
#define parent_class gst_h265_decoder_parent_class
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GstH265Decoder, gst_h265_decoder,
GST_TYPE_VIDEO_DECODER);
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 gboolean gst_h265_decoder_finish_current_picture (GstH265Decoder * self);
static void gst_h265_decoder_clear_dpb (GstH265Decoder * self);
static gboolean
gst_h265_decoder_output_all_remaining_pics (GstH265Decoder * self);
static gboolean gst_h265_decoder_start_current_picture (GstH265Decoder * self);
static void
gst_h265_decoder_class_init (GstH265DecoderClass * klass)
{
GstVideoDecoderClass *decoder_class = GST_VIDEO_DECODER_CLASS (klass);
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)
{
gst_video_decoder_set_packetized (GST_VIDEO_DECODER (self), TRUE);
self->priv = gst_h265_decoder_get_instance_private (self);
}
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;
}
gst_clear_buffer (&priv->codec_data);
if (priv->parser) {
gst_h265_parser_free (priv->parser);
priv->parser = NULL;
}
if (priv->dpb) {
gst_h265_dpb_free (priv->dpb);
priv->dpb = NULL;
}
return TRUE;
}
static gboolean
gst_h265_decoder_parse_vps (GstH265Decoder * self, GstH265NalUnit * nalu)
{
GstH265DecoderPrivate *priv = self->priv;
GstH265VPS vps;
GstH265ParserResult pres;
gboolean ret = TRUE;
pres = gst_h265_parser_parse_vps (priv->parser, nalu, &vps);
if (pres != GST_H265_PARSER_OK) {
GST_WARNING_OBJECT (self, "Failed to parse VPS, result %d", pres);
return FALSE;
}
GST_LOG_OBJECT (self, "VPS parsed");
return ret;
}
static gboolean
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;
guint high_precision_offsets_enabled_flag = 0;
guint bitdepthC = 0;
/* 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);
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) {
GstH265DecoderClass *klass = GST_H265_DECODER_GET_CLASS (self);
GST_DEBUG_OBJECT (self,
"SPS updated, resolution: %dx%d -> %dx%d, dpb size: %d -> %d",
priv->width, priv->height, sps->width, sps->height,
prev_max_dpb_size, max_dpb_size);
g_assert (klass->new_sequence);
if (!klass->new_sequence (self, sps)) {
GST_ERROR_OBJECT (self, "subclass does not want accept new sequence");
return FALSE;
}
priv->width = sps->width;
priv->height = sps->height;
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;
}
/* Calculate WpOffsetHalfRangeC: (7-34)
* FIXME: We don't have parser API for sps_range_extension, so
* assuming high_precision_offsets_enabled_flag as zero */
bitdepthC = sps->bit_depth_chroma_minus8 + 8;
priv->WpOffsetHalfRangeC =
1 << (high_precision_offsets_enabled_flag ? (bitdepthC - 1) : 7);
GST_DEBUG_OBJECT (self, "Set DPB max size %d", max_dpb_size);
return TRUE;
}
static gboolean
gst_h265_decoder_parse_sps (GstH265Decoder * self, GstH265NalUnit * nalu)
{
GstH265DecoderPrivate *priv = self->priv;
GstH265SPS sps;
GstH265ParserResult pres;
gboolean ret = TRUE;
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, result %d", pres);
return FALSE;
}
GST_LOG_OBJECT (self, "SPS parsed");
if (!gst_h265_decoder_process_sps (self, &sps))
ret = FALSE;
return ret;
}
static gboolean
gst_h265_decoder_parse_pps (GstH265Decoder * self, GstH265NalUnit * nalu)
{
GstH265DecoderPrivate *priv = self->priv;
GstH265PPS pps;
GstH265ParserResult pres;
pres = gst_h265_parser_parse_pps (priv->parser, nalu, &pps);
if (pres != GST_H265_PARSER_OK) {
GST_WARNING_OBJECT (self, "Failed to parse PPS, result %d", pres);
return FALSE;
}
GST_LOG_OBJECT (self, "PPS parsed");
return TRUE;
}
static gboolean
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;
if (!picture) {
GST_ERROR_OBJECT (self, "No current picture");
return FALSE;
}
g_assert (klass->decode_slice);
return klass->decode_slice (self, picture, slice);
}
static gboolean
gst_h265_decoder_preprocess_slice (GstH265Decoder * self, GstH265Slice * slice)
{
GstH265DecoderPrivate *priv = self->priv;
const GstH265SliceHdr *slice_hdr = &slice->header;
const GstH265NalUnit *nalu = &slice->nalu;
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 FALSE;
}
if (IS_IDR (nalu->type)) {
GST_DEBUG_OBJECT (self, "IDR nalu, clear dpb");
gst_h265_decoder_drain (GST_VIDEO_DECODER (self));
}
return TRUE;
}
static gboolean
gst_h265_decoder_parse_slice (GstH265Decoder * self, GstH265NalUnit * nalu,
GstClockTime pts)
{
GstH265DecoderPrivate *priv = self->priv;
GstH265ParserResult pres = GST_H265_PARSER_OK;
memset (&priv->current_slice, 0, sizeof (GstH265Slice));
pres = gst_h265_parser_parse_slice_hdr (priv->parser, nalu,
&priv->current_slice.header);
if (pres != GST_H265_PARSER_OK) {
GST_ERROR_OBJECT (self, "Failed to parse slice header, ret %d", pres);
memset (&priv->current_slice, 0, sizeof (GstH265Slice));
return FALSE;
}
priv->current_slice.nalu = *nalu;
if (!gst_h265_decoder_preprocess_slice (self, &priv->current_slice))
return FALSE;
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;
gboolean ret = TRUE;
picture = gst_h265_picture_new ();
picture->pts = pts;
if (klass->new_picture)
ret = klass->new_picture (self, picture);
if (!ret) {
GST_ERROR_OBJECT (self, "subclass does not want accept new picture");
gst_h265_picture_unref (picture);
return FALSE;
}
priv->current_picture = picture;
gst_video_codec_frame_set_user_data (priv->current_frame,
gst_h265_picture_ref (priv->current_picture),
(GDestroyNotify) gst_h265_picture_unref);
if (!gst_h265_decoder_start_current_picture (self)) {
GST_ERROR_OBJECT (self, "start picture failed");
return FALSE;
}
/* this picture was dropped */
if (!priv->current_picture)
return TRUE;
}
return gst_h265_decoder_decode_slice (self);
}
static GstFlowReturn
gst_h265_decoder_decode_nal (GstH265Decoder * self, GstH265NalUnit * nalu,
GstClockTime pts)
{
GstH265DecoderPrivate *priv = self->priv;
gboolean ret = TRUE;
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_decoder_parse_vps (self, nalu);
break;
case GST_H265_NAL_SPS:
ret = gst_h265_decoder_parse_sps (self, nalu);
break;
case GST_H265_NAL_PPS:
ret = gst_h265_decoder_parse_pps (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, pts);
priv->new_bitstream = FALSE;
priv->prev_nal_is_eos = FALSE;
break;
case GST_H265_NAL_EOB:
gst_h265_decoder_drain (GST_VIDEO_DECODER (self));
priv->new_bitstream = TRUE;
break;
case GST_H265_NAL_EOS:
gst_h265_decoder_drain (GST_VIDEO_DECODER (self));
priv->prev_nal_is_eos = TRUE;
break;
default:
break;
}
return ret;
}
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 gboolean
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;
/* parse the hvcC data */
if (size < 23) {
GST_WARNING_OBJECT (self, "hvcC too small");
return FALSE;
}
/* wrong hvcC version */
if (data[0] != 0 && data[0] != 1) {
return FALSE;
}
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 FALSE;
}
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 FALSE;
}
switch (nalu.type) {
case GST_H265_NAL_VPS:
gst_h265_decoder_parse_vps (self, &nalu);
break;
case GST_H265_NAL_SPS:
gst_h265_decoder_parse_sps (self, &nalu);
break;
case GST_H265_NAL_PPS:
gst_h265_decoder_parse_pps (self, &nalu);
break;
default:
break;
}
off = nalu.offset + nalu.size;
}
}
return TRUE;
}
static gboolean
gst_h265_decoder_set_format (GstVideoDecoder * decoder,
GstVideoCodecState * state)
{
GstH265Decoder *self = GST_H265_DECODER (decoder);
GstH265DecoderPrivate *priv = self->priv;
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);
if (state->caps) {
GstStructure *str;
const GValue *codec_data_value;
GstH265DecoderFormat format;
GstH265DecoderAlign align;
gst_h265_decoder_format_from_caps (self, state->caps, &format, &align);
str = gst_caps_get_structure (state->caps, 0);
codec_data_value = gst_structure_get_value (str, "codec_data");
if (GST_VALUE_HOLDS_BUFFER (codec_data_value)) {
gst_buffer_replace (&priv->codec_data,
gst_value_get_buffer (codec_data_value));
} else {
gst_buffer_replace (&priv->codec_data, NULL);
}
if (format == GST_H265_DECODER_FORMAT_NONE) {
/* codec_data implies packetized */
if (codec_data_value != NULL) {
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 (codec_data_value == NULL) {
/* 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) {
if (codec_data_value != NULL) {
GST_WARNING_OBJECT (self, "bytestream with codec data");
}
}
priv->in_format = format;
priv->align = align;
}
if (priv->codec_data) {
GstMapInfo map;
gst_buffer_map (priv->codec_data, &map, GST_MAP_READ);
gst_h265_decoder_parse_codec_data (self, map.data, map.size);
gst_buffer_unmap (priv->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);
return TRUE;
}
static GstFlowReturn
gst_h265_decoder_drain (GstVideoDecoder * decoder)
{
GstH265Decoder *self = GST_H265_DECODER (decoder);
GstH265DecoderPrivate *priv = self->priv;
priv->last_ret = GST_FLOW_OK;
gst_h265_decoder_output_all_remaining_pics (self);
gst_h265_decoder_clear_dpb (self);
return priv->last_ret;
}
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;
if (nalu->type >= GST_H265_NAL_SLICE_BLA_W_LP &&
nalu->type <= GST_H265_NAL_SLICE_CRA_NUT)
picture->RapPicFlag = TRUE;
/* FIXME: Use SEI header values */
picture->field = GST_H265_PICTURE_FIELD_FRAME;
/* 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 (IS_IDR (nalu->type) || IS_BLA (nalu->type) ||
(IS_CRA (nalu->type) && priv->new_bitstream) || priv->prev_nal_is_eos) {
picture->NoRaslOutputFlag = TRUE;
}
if (IS_IRAP (nalu->type)) {
picture->IntraPicFlag = TRUE;
priv->associated_irap_NoRaslOutputFlag = picture->NoRaslOutputFlag;
}
if (IS_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);
GST_DEBUG_OBJECT (self, "decode PicOrderCntVal");
priv->prev_poc_lsb = priv->poc_lsb;
priv->prev_poc_msb = priv->poc_msb;
if (!(IS_IRAP (nalu->type) && 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 (nalu->type) && 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 (IS_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 && !IS_RASL (nalu->type) &&
!IS_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_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;
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_derive_and_mark_rps (GstH265Decoder * self,
GstH265Picture * picture, gint32 * CurrDeltaPocMsbPresentFlag,
gint32 * FollDeltaPocMsbPresentFlag)
{
GstH265DecoderPrivate *priv = self->priv;
guint i;
GArray *dpb_array;
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);
}
/* (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 (IS_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 (IS_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->NumPocTotalCurr = 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, "NumPocTotalCurr: %d", self->NumPocTotalCurr);
/* 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_clear_dpb (GstH265Decoder * self)
{
GstH265DecoderPrivate *priv = self->priv;
gst_h265_dpb_clear (priv->dpb);
priv->last_output_poc = -1;
}
static void
gst_h265_decoder_do_output_picture (GstH265Decoder * self,
GstH265Picture * picture)
{
GstH265DecoderPrivate *priv = self->priv;
GstH265DecoderClass *klass;
picture->outputted = TRUE;
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;
klass = GST_H265_DECODER_GET_CLASS (self);
if (klass->output_picture)
priv->last_ret = klass->output_picture (self, picture);
}
static gint
poc_asc_compare (const GstH265Picture * a, const GstH265Picture * b)
{
return a->pic_order_cnt > b->pic_order_cnt;
}
static gboolean
gst_h265_decoder_output_all_remaining_pics (GstH265Decoder * self)
{
GstH265DecoderPrivate *priv = self->priv;
GList *to_output = NULL;
GList *iter;
gst_h265_dpb_get_pictures_not_outputted (priv->dpb, &to_output);
to_output = g_list_sort (to_output, (GCompareFunc) poc_asc_compare);
for (iter = to_output; iter; iter = g_list_next (iter)) {
GstH265Picture *picture = (GstH265Picture *) iter->data;
GST_LOG_OBJECT (self, "Output picture %p (poc %d)", picture,
picture->pic_order_cnt);
gst_h265_decoder_do_output_picture (self, picture);
}
if (to_output)
g_list_free_full (to_output, (GDestroyNotify) gst_h265_picture_unref);
return TRUE;
}
/* C.5.2.2 */
static gboolean
gst_h265_decoder_dpb_init (GstH265Decoder * self, const GstH265Slice * slice,
GstH265Picture * picture)
{
GstH265DecoderPrivate *priv = self->priv;
const GstH265SliceHdr *slice_hdr = &slice->header;
const GstH265NalUnit *nalu = &slice->nalu;
if (IS_IRAP (nalu->type) && picture->NoRaslOutputFlag && !priv->new_bitstream) {
if (nalu->type == GST_H265_NAL_SLICE_CRA_NUT)
picture->NoOutputOfPriorPicsFlag = TRUE;
else
picture->NoOutputOfPriorPicsFlag =
slice_hdr->no_output_of_prior_pics_flag;
if (picture->NoOutputOfPriorPicsFlag) {
GST_DEBUG_OBJECT (self, "Clear dpb");
gst_h265_decoder_drain (GST_VIDEO_DECODER (self));
}
}
return TRUE;
}
static gboolean
gst_h265_decoder_start_current_picture (GstH265Decoder * self)
{
GstH265DecoderClass *klass;
GstH265DecoderPrivate *priv = self->priv;
gboolean ret = TRUE;
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 FALSE;
/* Drop all RASL pictures having NoRaslOutputFlag is TRUE for the
* associated IRAP picture */
if (IS_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 TRUE;
}
gst_h265_decoder_prepare_rps (self, &priv->current_slice,
priv->current_picture);
gst_h265_decoder_dpb_init (self, &priv->current_slice, priv->current_picture);
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_ERROR_OBJECT (self, "subclass does not want to start picture");
return FALSE;
}
return TRUE;
}
static gboolean
gst_h265_decoder_finish_picture (GstH265Decoder * self,
GstH265Picture * picture)
{
GstH265DecoderPrivate *priv = self->priv;
const GstH265SPS *sps = priv->active_sps;
GList *not_outputted = NULL;
guint num_remaining;
GList *iter;
#ifndef GST_DISABLE_GST_DEBUG
gint i;
#endif
/* Remove unused (for reference or later output) pictures from DPB, marking
* them as such */
gst_h265_dpb_delete_unused (priv->dpb);
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));
/* The ownership of pic will either be transferred to DPB - if the picture is
* still needed (for output and/or reference) - or we will release it
* immediately if we manage to output it here and won't have to store it for
* future reference */
/* Get all pictures that haven't been outputted yet */
gst_h265_dpb_get_pictures_not_outputted (priv->dpb, &not_outputted);
/* C.5.2.3 */
for (iter = not_outputted; iter; iter = g_list_next (iter)) {
GstH265Picture *other = GST_H265_PICTURE (iter->data);
if (!other->outputted)
other->pic_latency_cnt++;
}
if (picture->output_flag) {
picture->outputted = FALSE;
picture->pic_latency_cnt = 0;
} else {
picture->outputted = TRUE;
}
/* set pic as short_term_ref */
picture->ref = TRUE;
picture->long_term = FALSE;
/* Include the one we've just decoded */
not_outputted = g_list_append (not_outputted, picture);
/* for debugging */
#ifndef GST_DISABLE_GST_DEBUG
GST_TRACE_OBJECT (self, "Before sorting not outputted list");
i = 0;
for (iter = not_outputted; iter; iter = g_list_next (iter)) {
GstH265Picture *tmp = (GstH265Picture *) iter->data;
GST_TRACE_OBJECT (self,
"\t%dth picture %p (poc %d)", i, tmp, tmp->pic_order_cnt);
i++;
}
#endif
/* Sort in output order */
not_outputted = g_list_sort (not_outputted, (GCompareFunc) poc_asc_compare);
#ifndef GST_DISABLE_GST_DEBUG
GST_TRACE_OBJECT (self,
"After sorting not outputted list in poc ascending order");
i = 0;
for (iter = not_outputted; iter; iter = g_list_next (iter)) {
GstH265Picture *tmp = (GstH265Picture *) iter->data;
GST_TRACE_OBJECT (self,
"\t%dth picture %p (poc %d)", i, tmp, tmp->pic_order_cnt);
i++;
}
#endif
/* Try to output as many pictures as we can. A picture can be output,
* if the number of decoded and not yet outputted pictures that would remain
* in DPB afterwards would at least be equal to max_num_reorder_frames.
* If the outputted picture is not a reference picture, it doesn't have
* to remain in the DPB and can be removed */
iter = not_outputted;
num_remaining = g_list_length (not_outputted);
while (num_remaining > sps->max_num_reorder_pics[sps->max_sub_layers_minus1]
|| (num_remaining &&
sps->max_latency_increase_plus1[sps->max_sub_layers_minus1] &&
!GST_H265_PICTURE (iter->data)->outputted &&
GST_H265_PICTURE (iter->data)->pic_latency_cnt >=
priv->SpsMaxLatencyPictures)) {
GstH265Picture *to_output = GST_H265_PICTURE (iter->data);
GST_LOG_OBJECT (self,
"Output picture %p (poc %d)", to_output, to_output->pic_order_cnt);
gst_h265_decoder_do_output_picture (self, to_output);
if (!to_output->ref) {
/* Current picture hasn't been inserted into DPB yet, so don't remove it
* if we managed to output it immediately */
gint outputted_poc = to_output->pic_order_cnt;
if (outputted_poc != picture->pic_order_cnt) {
GST_LOG_OBJECT (self, "Delete picture %p (poc %d) from DPB",
to_output, to_output->pic_order_cnt);
gst_h265_dpb_delete_by_poc (priv->dpb, outputted_poc);
}
}
iter = g_list_next (iter);
num_remaining--;
}
/* If we haven't managed to output the picture that we just decoded, or if
* it's a reference picture, we have to store it in DPB */
if (!picture->outputted || picture->ref) {
if (gst_h265_dpb_is_full (priv->dpb)) {
/* If we haven't managed to output anything to free up space in DPB
* to store this picture, it's an error in the stream */
GST_WARNING_OBJECT (self, "Could not free up space in DPB");
return FALSE;
}
GST_TRACE_OBJECT (self,
"Put picture %p (outputted %d, ref %d, poc %d) to dpb",
picture, picture->outputted, picture->ref, picture->pic_order_cnt);
gst_h265_dpb_add (priv->dpb, gst_h265_picture_ref (picture));
}
if (not_outputted)
g_list_free_full (not_outputted, (GDestroyNotify) gst_h265_picture_unref);
return TRUE;
}
static gboolean
gst_h265_decoder_finish_current_picture (GstH265Decoder * self)
{
GstH265DecoderPrivate *priv = self->priv;
GstH265DecoderClass *klass;
gboolean ret = TRUE;
if (!priv->current_picture)
return TRUE;
klass = GST_H265_DECODER_GET_CLASS (self);
if (klass->end_picture)
ret = klass->end_picture (self, priv->current_picture);
/* finish picture takes ownership of the picture */
ret = gst_h265_decoder_finish_picture (self, priv->current_picture);
priv->current_picture = NULL;
if (!ret) {
GST_ERROR_OBJECT (self, "Failed to finish picture");
return FALSE;
}
return TRUE;
}
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;
gboolean decode_ret = TRUE;
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)));
priv->current_frame = frame;
priv->last_ret = GST_FLOW_OK;
gst_buffer_map (in_buf, &map, GST_MAP_READ);
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 && decode_ret) {
decode_ret = gst_h265_decoder_decode_nal (self,
&nalu, GST_BUFFER_PTS (in_buf));
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 && decode_ret) {
decode_ret = gst_h265_decoder_decode_nal (self,
&nalu, GST_BUFFER_PTS (in_buf));
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;
}
}
gst_buffer_unmap (in_buf, &map);
priv->current_frame = NULL;
if (!decode_ret) {
GST_VIDEO_DECODER_ERROR (self, 1, STREAM, DECODE,
("Failed to decode data"), (NULL), priv->last_ret);
gst_video_decoder_drop_frame (decoder, frame);
gst_h265_picture_clear (&priv->current_picture);
return priv->last_ret;
}
gst_h265_decoder_finish_current_picture (self);
gst_video_codec_frame_unref (frame);
return priv->last_ret;
}
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