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gstreamer/gst-libs/gst/codecparsers/gsth265parser.c
Gwenole Beauchesne e84b0d626c codecparsers: cosmetics: drop TAB characters. 
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
2014-03-25 15:48:40 +01:00

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/* Gstreamer H.265 bitstream parser
* Copyright (C) 2012 Intel Corporation
* Copyright (C) 2013 Sreerenj Balachandran <sreerenj.balachandran@intel.com>
*
* Contact: Sreerenj Balachandran <sreerenj.balachandran@intel.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:gsth265parser
* @short_description: Convenience library for h265 video bitstream parsing.
*
* It offers you bitstream parsing in HEVC mode and non-HEVC mode. To identify
* Nals in a bitstream and parse its headers, you should call:
* <itemizedlist>
* <listitem>
* gst_h265_parser_identify_nalu() to identify the following nalu in
* non-HEVC bitstreams
* </listitem>
* <listitem>
* gst_h265_parser_identify_nalu_hevc() to identify the nalu in
* HEVC bitstreams
* </listitem>
* </itemizedlist>
*
* Then, depending on the #GstH265NalUnitType of the newly parsed #GstH265NalUnit,
* you should call the differents functions to parse the structure:
* <itemizedlist>
* <listitem>
* From #GST_H265_NAL_SLICE_TRAIL_N to #GST_H265_NAL_SLICE_CRA_NUT: gst_h265_parser_parse_slice_hdr()
* </listitem>
* <listitem>
* #GST_H265_NAL_SEI: gst_h265_parser_parse_sei()
* </listitem>
* <listitem>
* #GST_H265_NAL_VPS: gst_h265_parser_parse_vps()
* </listitem>
* <listitem>
* #GST_H265_NAL_SPS: gst_h265_parser_parse_sps()
* </listitem>
* <listitem>
* #GST_H265_NAL_PPS: #gst_h265_parser_parse_pps()
* </listitem>
* <listitem>
* Any other: gst_h265_parser_parse_nal()
* </listitem>
* </itemizedlist>
*
* Note: You should always call gst_h265_parser_parse_nal() if you don't
* actually need #GstH265NalUnitType to be parsed for your personal use, in
* order to guarantee that the #GstH265Parser is always up to date.
*
* For more details about the structures, look at the ITU-T H.265
* specifications, you can download them from:
*
* <itemizedlist>
* <listitem>
* ITU-T H.265: http://www.itu.int/rec/T-REC-H.265
* </listitem>
* </itemizedlist>
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "nalutils.h"
#include "gsth265parser.h"
#include <gst/base/gstbytereader.h>
#include <gst/base/gstbitreader.h>
#include <string.h>
#include <math.h>
GST_DEBUG_CATEGORY (h265_parser_debug);
#define GST_CAT_DEFAULT h265_parser_debug
static gboolean initialized = FALSE;
#define INITIALIZE_DEBUG_CATEGORY \
if (!initialized) { \
GST_DEBUG_CATEGORY_INIT (h265_parser_debug, "codecparsers_h265", 0, \
"h265 parser library"); \
initialized = TRUE; \
}
/**** Default scaling_lists according to Table 7-5 and 7-6 *****/
/* Table 7-5 */
static const guint8 default_scaling_list0[16] = {
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16
};
/* Combined the values in Table 7-6 to make the calculation easier
* Default scaling list of 8x8 and 16x16 matrices for matrixId = 0, 1 and 2
* Default scaling list of 32x32 matrix for matrixId = 0
*/
static const guint8 default_scaling_list1[64] = {
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 16,
17, 16, 17, 18, 17, 18, 18, 17, 18, 21, 19, 20,
21, 20, 19, 21, 24, 22, 22, 24, 24, 22, 22, 24,
25, 25, 27, 30, 27, 25, 25, 29, 31, 35, 35, 31,
29, 36, 41, 44, 41, 36, 47, 54, 54, 47, 65, 70,
65, 88, 88, 115
};
/* Combined the values in Table 7-6 to make the calculation easier
* Default scaling list of 8x8 and 16x16 matrices for matrixId = 3, 4 and 5
* Default scaling list of 32x32 matrix for matrixId = 1
*/
static const guint8 default_scaling_list2[64] = {
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17,
17, 17, 17, 17, 18, 18, 18, 18, 18, 20, 20, 20,
20, 20, 20, 20, 24, 24, 24, 24, 24, 24, 24, 24,
25, 25, 25, 25, 25, 25, 25, 28, 28, 28, 28, 28,
28, 33, 33, 33, 33, 33, 41, 41, 41, 41, 54, 54,
54, 71, 71, 91
};
typedef struct
{
guint par_n, par_d;
} PAR;
/* Table E-1 - Meaning of sample aspect ratio indicator (1..16) */
static PAR aspect_ratios[17] = {
{0, 0},
{1, 1},
{12, 11},
{10, 11},
{16, 11},
{40, 33},
{24, 11},
{20, 11},
{32, 11},
{80, 33},
{18, 11},
{15, 11},
{64, 33},
{160, 99},
{4, 3},
{3, 2},
{2, 1}
};
/***** Utils ****/
#define EXTENDED_SAR 255
static GstH265VPS *
gst_h265_parser_get_vps (GstH265Parser * parser, guint8 vps_id)
{
GstH265VPS *vps;
vps = &parser->vps[vps_id];
if (vps->valid)
return vps;
return NULL;
}
static GstH265SPS *
gst_h265_parser_get_sps (GstH265Parser * parser, guint8 sps_id)
{
GstH265SPS *sps;
sps = &parser->sps[sps_id];
if (sps->valid)
return sps;
return NULL;
}
static GstH265PPS *
gst_h265_parser_get_pps (GstH265Parser * parser, guint8 pps_id)
{
GstH265PPS *pps;
pps = &parser->pps[pps_id];
if (pps->valid)
return pps;
return NULL;
}
static gboolean
gst_h265_parse_nalu_header (GstH265NalUnit * nalu)
{
guint8 *data = nalu->data + nalu->offset;
GstBitReader br;
if (nalu->size < 2)
return FALSE;
gst_bit_reader_init (&br, data, nalu->size - nalu->offset);
/* skip the forbidden_zero_bit */
gst_bit_reader_skip_unchecked (&br, 1);
nalu->type = gst_bit_reader_get_bits_uint8_unchecked (&br, 6);
nalu->layer_id = gst_bit_reader_get_bits_uint8_unchecked (&br, 6);
nalu->temporal_id_plus1 = gst_bit_reader_get_bits_uint8_unchecked (&br, 3);
nalu->header_bytes = 2;
return TRUE;
}
/****** Parsing functions *****/
static gboolean
gst_h265_parse_profile_tier_level (GstH265ProfileTierLevel * ptl,
NalReader * nr, guint8 maxNumSubLayersMinus1)
{
guint i, j;
GST_DEBUG ("parsing \"ProfileTierLevel parameters\"");
/* set default values for fields that might not be present in the
* bitstream and have valid defaults */
for (i = 0; i < maxNumSubLayersMinus1; i++)
ptl->sub_layer_tier_flag[i] = 0;
READ_UINT8 (nr, ptl->profile_space, 2);
READ_UINT8 (nr, ptl->tier_flag, 1);
READ_UINT8 (nr, ptl->profile_idc, 5);
for (j = 0; j < 32; j++)
READ_UINT8 (nr, ptl->profile_compatibility_flag[j], 1);
READ_UINT8 (nr, ptl->progressive_source_flag, 1);
READ_UINT8 (nr, ptl->interlaced_source_flag, 1);
READ_UINT8 (nr, ptl->non_packed_constraint_flag, 1);
READ_UINT8 (nr, ptl->frame_only_constraint_flag, 1);
/* skip the reserved zero bits */
if (!nal_reader_skip (nr, 44))
goto error;
READ_UINT8 (nr, ptl->level_idc, 8);
for (j = 0; j < maxNumSubLayersMinus1; j++) {
READ_UINT8 (nr, ptl->sub_layer_profile_present_flag[j], 1);
READ_UINT8 (nr, ptl->sub_layer_level_present_flag[j], 1);
}
if (maxNumSubLayersMinus1 > 0) {
for (i = maxNumSubLayersMinus1; i < 8; i++)
if (!nal_reader_skip (nr, 2))
goto error;
}
for (i = 0; i < maxNumSubLayersMinus1; i++) {
if (ptl->sub_layer_profile_present_flag[i]) {
READ_UINT8 (nr, ptl->sub_layer_profile_space[i], 2);
READ_UINT8 (nr, ptl->sub_layer_tier_flag[i], 1);
READ_UINT8 (nr, ptl->sub_layer_profile_idc[i], 5);
for (j = 0; j < 32; j++)
READ_UINT8 (nr, ptl->sub_layer_profile_compatibility_flag[i][j], 1);
READ_UINT8 (nr, ptl->sub_layer_progressive_source_flag[i], 1);
READ_UINT8 (nr, ptl->sub_layer_interlaced_source_flag[i], 1);
READ_UINT8 (nr, ptl->sub_layer_non_packed_constraint_flag[i], 1);
READ_UINT8 (nr, ptl->sub_layer_frame_only_constraint_flag[i], 1);
if (!nal_reader_skip (nr, 44))
goto error;
}
if (ptl->sub_layer_level_present_flag[i])
READ_UINT8 (nr, ptl->sub_layer_level_idc[i], 8);
}
return TRUE;
error:
GST_WARNING ("error parsing \"ProfileTierLevel Parameters\"");
return FALSE;
}
static gboolean
gst_h265_parse_sub_layer_hrd_parameters (GstH265SubLayerHRDParams * sub_hrd,
NalReader * nr, guint8 CpbCnt, guint8 sub_pic_hrd_params_present_flag)
{
guint i;
GST_DEBUG ("parsing \"SubLayer HRD Parameters\"");
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
for (i = 0; i <= CpbCnt; i++)
sub_hrd->cbr_flag[i] = 0;
for (i = 0; i <= CpbCnt; i++) {
READ_UE_ALLOWED (nr, sub_hrd->bit_rate_value_minus1[i], 0, G_MAXUINT32 - 1);
READ_UE_ALLOWED (nr, sub_hrd->cpb_size_value_minus1[i], 0, G_MAXUINT32 - 1);
if (sub_pic_hrd_params_present_flag) {
READ_UE_ALLOWED (nr, sub_hrd->cpb_size_du_value_minus1[i], 0,
G_MAXUINT32 - 1);
READ_UE_ALLOWED (nr, sub_hrd->bit_rate_du_value_minus1[i], 0,
G_MAXUINT32 - 1);
}
READ_UINT8 (nr, sub_hrd->cbr_flag[i], 1);
}
return TRUE;
error:
GST_WARNING ("error parsing \"SubLayerHRD Parameters \"");
return FALSE;
}
static gboolean
gst_h265_parse_hrd_parameters (GstH265HRDParams * hrd, NalReader * nr,
guint8 commonInfPresentFlag, guint8 maxNumSubLayersMinus1)
{
guint i;
GST_DEBUG ("parsing \"HRD Parameters\"");
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
hrd->sub_pic_hrd_params_present_flag = 0;
hrd->sub_pic_cpb_params_in_pic_timing_sei_flag = 0;
hrd->initial_cpb_removal_delay_length_minus1 = 23;
hrd->au_cpb_removal_delay_length_minus1 = 23;
hrd->dpb_output_delay_length_minus1 = 23;
for (i = 0; i <= maxNumSubLayersMinus1; i++) {
hrd->fixed_pic_rate_general_flag[i] = 0;
hrd->low_delay_hrd_flag[i] = 0;
hrd->cpb_cnt_minus1[i] = 0;
}
if (commonInfPresentFlag) {
READ_UINT8 (nr, hrd->nal_hrd_parameters_present_flag, 1);
READ_UINT8 (nr, hrd->vcl_hrd_parameters_present_flag, 1);
if (hrd->nal_hrd_parameters_present_flag
|| hrd->vcl_hrd_parameters_present_flag) {
READ_UINT8 (nr, hrd->sub_pic_hrd_params_present_flag, 1);
if (hrd->sub_pic_hrd_params_present_flag) {
READ_UINT8 (nr, hrd->tick_divisor_minus2, 8);
READ_UINT8 (nr, hrd->du_cpb_removal_delay_increment_length_minus1, 5);
READ_UINT8 (nr, hrd->sub_pic_cpb_params_in_pic_timing_sei_flag, 1);
READ_UINT8 (nr, hrd->dpb_output_delay_du_length_minus1, 5);
}
READ_UINT8 (nr, hrd->bit_rate_scale, 4);
READ_UINT8 (nr, hrd->cpb_size_scale, 4);
if (hrd->sub_pic_hrd_params_present_flag)
READ_UINT8 (nr, hrd->cpb_size_du_scale, 4);
READ_UINT8 (nr, hrd->initial_cpb_removal_delay_length_minus1, 5);
READ_UINT8 (nr, hrd->au_cpb_removal_delay_length_minus1, 5);
READ_UINT8 (nr, hrd->dpb_output_delay_length_minus1, 5);
}
}
for (i = 0; i <= maxNumSubLayersMinus1; i++) {
READ_UINT8 (nr, hrd->fixed_pic_rate_general_flag[i], 1);
if (!hrd->fixed_pic_rate_general_flag[i]) {
READ_UINT8 (nr, hrd->fixed_pic_rate_within_cvs_flag[i], 1);
} else
hrd->fixed_pic_rate_within_cvs_flag[i] = 1;
if (hrd->fixed_pic_rate_within_cvs_flag[i]) {
READ_UE_ALLOWED (nr, hrd->elemental_duration_in_tc_minus1[i], 0, 2047);
} else
READ_UINT8 (nr, hrd->low_delay_hrd_flag[i], 1);
if (!hrd->low_delay_hrd_flag[i])
READ_UE_ALLOWED (nr, hrd->cpb_cnt_minus1[i], 0, 31);
if (hrd->nal_hrd_parameters_present_flag)
if (!gst_h265_parse_sub_layer_hrd_parameters (&hrd->sublayer_hrd_params
[i], nr, hrd->cpb_cnt_minus1[i],
hrd->sub_pic_hrd_params_present_flag))
goto error;
if (hrd->vcl_hrd_parameters_present_flag)
if (!gst_h265_parse_sub_layer_hrd_parameters (&hrd->sublayer_hrd_params
[i], nr, hrd->cpb_cnt_minus1[i],
hrd->sub_pic_hrd_params_present_flag))
goto error;
}
return TRUE;
error:
GST_WARNING ("error parsing \"HRD Parameters\"");
return FALSE;
}
static gboolean
gst_h265_parse_vui_parameters (GstH265SPS * sps, NalReader * nr)
{
GstH265VUIParams *vui = &sps->vui_params;
GST_DEBUG ("parsing \"VUI Parameters\"");
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
vui->aspect_ratio_idc = 0;
vui->video_format = 5;
vui->video_full_range_flag = 0;
vui->colour_primaries = 2;
vui->transfer_characteristics = 2;
vui->matrix_coefficients = 2;
vui->chroma_sample_loc_type_top_field = 0;
vui->chroma_sample_loc_type_bottom_field = 0;
vui->neutral_chroma_indication_flag = 0;
vui->field_seq_flag = 0;
vui->def_disp_win_left_offset = 0;
vui->def_disp_win_right_offset = 0;
vui->def_disp_win_top_offset = 0;
vui->def_disp_win_bottom_offset = 0;
vui->tiles_fixed_structure_flag = 0;
vui->motion_vectors_over_pic_boundaries_flag = 1;
vui->min_spatial_segmentation_idc = 0;
vui->max_bytes_per_pic_denom = 2;
vui->max_bits_per_min_cu_denom = 1;
vui->log2_max_mv_length_horizontal = 15;
vui->log2_max_mv_length_vertical = 15;
vui->par_n = 0;
vui->par_d = 0;
if (sps && sps->profile_tier_level.progressive_source_flag
&& sps->profile_tier_level.interlaced_source_flag)
vui->frame_field_info_present_flag = 1;
else
vui->frame_field_info_present_flag = 0;
READ_UINT8 (nr, vui->aspect_ratio_info_present_flag, 1);
if (vui->aspect_ratio_info_present_flag) {
READ_UINT8 (nr, vui->aspect_ratio_idc, 8);
if (vui->aspect_ratio_idc == EXTENDED_SAR) {
READ_UINT16 (nr, vui->sar_width, 16);
READ_UINT16 (nr, vui->sar_height, 16);
vui->par_n = vui->sar_width;
vui->par_d = vui->sar_height;
} else if (vui->aspect_ratio_idc <= 16) {
vui->par_n = aspect_ratios[vui->aspect_ratio_idc].par_n;
vui->par_d = aspect_ratios[vui->aspect_ratio_idc].par_d;
}
}
READ_UINT8 (nr, vui->overscan_info_present_flag, 1);
if (vui->overscan_info_present_flag)
READ_UINT8 (nr, vui->overscan_appropriate_flag, 1);
READ_UINT8 (nr, vui->video_signal_type_present_flag, 1);
if (vui->video_signal_type_present_flag) {
READ_UINT8 (nr, vui->video_format, 3);
READ_UINT8 (nr, vui->video_full_range_flag, 1);
READ_UINT8 (nr, vui->colour_description_present_flag, 1);
if (vui->colour_description_present_flag) {
READ_UINT8 (nr, vui->colour_primaries, 8);
READ_UINT8 (nr, vui->transfer_characteristics, 8);
READ_UINT8 (nr, vui->matrix_coefficients, 8);
}
}
READ_UINT8 (nr, vui->chroma_loc_info_present_flag, 1);
if (vui->chroma_loc_info_present_flag) {
READ_UE_ALLOWED (nr, vui->chroma_sample_loc_type_top_field, 0, 5);
READ_UE_ALLOWED (nr, vui->chroma_sample_loc_type_bottom_field, 0, 5);
}
READ_UINT8 (nr, vui->neutral_chroma_indication_flag, 1);
READ_UINT8 (nr, vui->field_seq_flag, 1);
READ_UINT8 (nr, vui->frame_field_info_present_flag, 1);
READ_UINT8 (nr, vui->default_display_window_flag, 1);
if (vui->default_display_window_flag) {
READ_UE (nr, vui->def_disp_win_left_offset);
READ_UE (nr, vui->def_disp_win_right_offset);
READ_UE (nr, vui->def_disp_win_top_offset);
READ_UE (nr, vui->def_disp_win_bottom_offset);
}
READ_UINT8 (nr, vui->timing_info_present_flag, 1);
if (vui->timing_info_present_flag) {
READ_UINT32 (nr, vui->num_units_in_tick, 32);
if (vui->num_units_in_tick == 0)
GST_WARNING ("num_units_in_tick = 0 detected in stream "
"(incompliant to H.265 E.2.1).");
READ_UINT32 (nr, vui->time_scale, 32);
if (vui->time_scale == 0)
GST_WARNING ("time_scale = 0 detected in stream "
"(incompliant to H.265 E.2.1).");
READ_UINT8 (nr, vui->poc_proportional_to_timing_flag, 1);
if (vui->poc_proportional_to_timing_flag)
READ_UE_ALLOWED (nr, vui->num_ticks_poc_diff_one_minus1, 0,
G_MAXUINT32 - 1);
READ_UINT8 (nr, vui->hrd_parameters_present_flag, 1);
if (vui->hrd_parameters_present_flag)
if (!gst_h265_parse_hrd_parameters (&vui->hrd_params, nr, 1,
sps->max_sub_layers_minus1))
goto error;
}
READ_UINT8 (nr, vui->bitstream_restriction_flag, 1);
if (vui->bitstream_restriction_flag) {
READ_UINT8 (nr, vui->tiles_fixed_structure_flag, 1);
READ_UINT8 (nr, vui->motion_vectors_over_pic_boundaries_flag, 1);
READ_UINT8 (nr, vui->restricted_ref_pic_lists_flag, 1);
READ_UE_ALLOWED (nr, vui->min_spatial_segmentation_idc, 0, 4096);
READ_UE_ALLOWED (nr, vui->max_bytes_per_pic_denom, 0, 16);
READ_UE_ALLOWED (nr, vui->max_bits_per_min_cu_denom, 0, 16);
READ_UE_ALLOWED (nr, vui->log2_max_mv_length_horizontal, 0, 16);
READ_UE_ALLOWED (nr, vui->log2_max_mv_length_vertical, 0, 15);
}
return TRUE;
error:
GST_WARNING ("error parsing \"VUI Parameters\"");
return FALSE;
}
static gboolean
get_scaling_list_params (GstH265ScalingList * dest_scaling_list,
guint8 sizeId, guint8 matrixId, guint8 ** sl, guint8 * size,
gint16 ** scaling_list_dc_coef_minus8)
{
switch (sizeId) {
case GST_H265_QUANT_MATIX_4X4:
*sl = dest_scaling_list->scaling_lists_4x4[matrixId];
if (size)
*size = 16;
break;
case GST_H265_QUANT_MATIX_8X8:
*sl = dest_scaling_list->scaling_lists_8x8[matrixId];
if (size)
*size = 64;
break;
case GST_H265_QUANT_MATIX_16X16:
*sl = dest_scaling_list->scaling_lists_16x16[matrixId];
if (size)
*size = 64;
if (scaling_list_dc_coef_minus8)
*scaling_list_dc_coef_minus8 =
dest_scaling_list->scaling_list_dc_coef_minus8_16x16;
break;
case GST_H265_QUANT_MATIX_32X32:
*sl = dest_scaling_list->scaling_lists_32x32[matrixId];
if (size)
*size = 64;
if (scaling_list_dc_coef_minus8)
*scaling_list_dc_coef_minus8 =
dest_scaling_list->scaling_list_dc_coef_minus8_32x32;
break;
default:
return FALSE;
}
return TRUE;
}
static gboolean
get_default_scaling_lists (guint8 ** sl, guint8 sizeId, guint8 matrixId)
{
switch (sizeId) {
case GST_H265_QUANT_MATIX_4X4:
memcpy (*sl, default_scaling_list0, 16);
break;
case GST_H265_QUANT_MATIX_8X8:
case GST_H265_QUANT_MATIX_16X16:
if (matrixId >= 0 && matrixId <= 2)
memcpy (*sl, default_scaling_list1, 64);
else
memcpy (*sl, default_scaling_list2, 64);
break;
case GST_H265_QUANT_MATIX_32X32:
if (matrixId == 0)
memcpy (*sl, default_scaling_list1, 64);
else
memcpy (*sl, default_scaling_list2, 64);
break;
default:
return FALSE;
break;
}
return TRUE;
}
static gboolean
gst_h265_parser_parse_scaling_lists (NalReader * nr,
GstH265ScalingList * dest_scaling_list, gboolean use_default)
{
guint8 sizeId;
guint8 matrixId;
guint8 scaling_list_pred_mode_flag = 0;
guint8 scaling_list_pred_matrix_id_delta = 0;
guint8 size, i;
GST_DEBUG ("parsing scaling lists");
for (sizeId = 0; sizeId < 4; sizeId++) {
for (matrixId = 0; matrixId < ((sizeId == 3) ? 2 : 6); matrixId++) {
gint16 *scaling_list_dc_coef_minus8 = NULL;
guint8 *sl;
if (!get_scaling_list_params (dest_scaling_list, sizeId, matrixId, &sl,
&size, &scaling_list_dc_coef_minus8))
goto error;
/* use_default_scaling_matrices forcefully which means,
* sps_scaling_list_enabled_flag=TRUE,
* sps_scaling_list_data_present_flag=FALSE,
* pps_scaling_list_data_present_falg=FALSE */
if (use_default) {
if (!get_default_scaling_lists (&sl, sizeId, matrixId))
goto error;
/* Inferring the value of scaling_list_dc_coef_minus8 */
if (sizeId > 1)
scaling_list_dc_coef_minus8[matrixId] = 8;
} else {
READ_UINT8 (nr, scaling_list_pred_mode_flag, 1);
if (!scaling_list_pred_mode_flag) {
guint8 refMatrixId;
READ_UE_ALLOWED (nr, scaling_list_pred_matrix_id_delta, 0, matrixId);
if (!scaling_list_pred_matrix_id_delta) {
if (!get_default_scaling_lists (&sl, sizeId, matrixId))
goto error;
/* Inferring the value of scaling_list_dc_coef_minus8 */
if (sizeId > 1)
scaling_list_dc_coef_minus8[matrixId] = 8;
} else {
guint8 *temp_sl;
refMatrixId = matrixId - scaling_list_pred_matrix_id_delta; /* 7-30 */
if (!get_scaling_list_params (dest_scaling_list, sizeId,
refMatrixId, &temp_sl, NULL, NULL))
goto error;
for (i = 0; i < size; i++)
sl[i] = temp_sl[i]; /* 7-31 */
/* Inferring the value of scaling_list_dc_coef_minus8 */
if (sizeId > 1)
scaling_list_dc_coef_minus8[matrixId] =
scaling_list_dc_coef_minus8[refMatrixId];
}
} else {
guint8 nextCoef = 8;
gint8 scaling_list_delta_coef;
if (sizeId > 1) {
READ_SE_ALLOWED (nr, scaling_list_dc_coef_minus8[matrixId], -7,
247);
nextCoef = scaling_list_dc_coef_minus8[matrixId] + 8;
}
for (i = 0; i < size; i++) {
READ_SE_ALLOWED (nr, scaling_list_delta_coef, -128, 127);
nextCoef = (nextCoef + scaling_list_delta_coef) & 0xff;
sl[i] = nextCoef;
}
}
}
}
}
return TRUE;
error:
GST_WARNING ("error parsing scaling lists");
return FALSE;
}
static gboolean
gst_h265_parser_parse_short_term_ref_pic_sets (GstH265ShortTermRefPicSet *
stRPS, NalReader * nr, guint8 stRpsIdx, GstH265SPS * sps)
{
guint8 num_short_term_ref_pic_sets;
guint8 RefRpsIdx = 0;
guint16 deltaRps = 0;
guint8 use_delta_flag[16] = { 0 };
guint8 used_by_curr_pic_flag[16] = { 0 };
guint32 delta_poc_s0_minus1[16] = { 0 };
guint32 delta_poc_s1_minus1[16] = { 0 };
gint j, i = 0;
gint dPoc;
GST_DEBUG ("parsing \"ShortTermRefPicSetParameters\"");
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
stRPS->inter_ref_pic_set_prediction_flag = 0;
stRPS->delta_idx_minus1 = 0;
for (j = 0; j < 16; j++)
use_delta_flag[j] = 1;
num_short_term_ref_pic_sets = sps->num_short_term_ref_pic_sets;
if (stRpsIdx != 0)
READ_UINT8 (nr, stRPS->inter_ref_pic_set_prediction_flag, 1);
if (stRPS->inter_ref_pic_set_prediction_flag) {
GstH265ShortTermRefPicSet *RefRPS;
if (stRpsIdx == num_short_term_ref_pic_sets)
READ_UE_ALLOWED (nr, stRPS->delta_idx_minus1, 0, stRpsIdx - 1);
READ_UINT8 (nr, stRPS->delta_rps_sign, 1);
READ_UE_ALLOWED (nr, stRPS->abs_delta_rps_minus1, 0, 32767);
RefRpsIdx = stRpsIdx - stRPS->delta_idx_minus1 - 1; /* 7-45 */
deltaRps = (1 - 2 * stRPS->delta_rps_sign) * (stRPS->abs_delta_rps_minus1 + 1); /* 7-46 */
RefRPS = &sps->short_term_ref_pic_set[RefRpsIdx];
for (j = 0; j <= RefRPS->NumDeltaPocs; j++) {
READ_UINT8 (nr, used_by_curr_pic_flag[j], 1);
if (!used_by_curr_pic_flag[j])
READ_UINT8 (nr, use_delta_flag[j], 1);
if (used_by_curr_pic_flag[j] || use_delta_flag[j])
stRPS->NumDeltaPocs++;
}
/* 7-47: calcuate NumNegativePics, DeltaPocS0 and UsedByCurrPicS0 */
i = 0;
for (j = (RefRPS->NumPositivePics - 1); j >= 0; j--) {
dPoc = RefRPS->DeltaPocS1[j] + deltaRps;
if (dPoc < 0 && use_delta_flag[RefRPS->NumNegativePics + j]) {
stRPS->DeltaPocS0[i] = dPoc;
stRPS->UsedByCurrPicS0[i++] =
used_by_curr_pic_flag[RefRPS->NumNegativePics + j];
}
}
if (deltaRps < 0 && use_delta_flag[RefRPS->NumDeltaPocs]) {
stRPS->DeltaPocS0[i] = deltaRps;
stRPS->UsedByCurrPicS0[i++] = used_by_curr_pic_flag[RefRPS->NumDeltaPocs];
}
for (j = 0; j < RefRPS->NumNegativePics; j++) {
dPoc = RefRPS->DeltaPocS0[j] + deltaRps;
if (dPoc < 0 && use_delta_flag[j]) {
stRPS->DeltaPocS0[i] = dPoc;
stRPS->UsedByCurrPicS0[i++] = used_by_curr_pic_flag[j];
}
}
stRPS->NumNegativePics = i;
/* 7-48: calcuate NumPositivePics, DeltaPocS1 and UsedByCurrPicS1 */
i = 0;
for (j = (RefRPS->NumNegativePics - 1); j >= 0; j--) {
dPoc = RefRPS->DeltaPocS0[j] + deltaRps;
if (dPoc > 0 && use_delta_flag[j]) {
stRPS->DeltaPocS1[i] = dPoc;
stRPS->UsedByCurrPicS1[i++] = used_by_curr_pic_flag[j];
}
}
if (deltaRps > 0 && use_delta_flag[RefRPS->NumDeltaPocs]) {
stRPS->DeltaPocS1[i] = deltaRps;
stRPS->UsedByCurrPicS1[i++] = used_by_curr_pic_flag[RefRPS->NumDeltaPocs];
}
for (j = 0; j < RefRPS->NumPositivePics; j++) {
dPoc = RefRPS->DeltaPocS1[j] + deltaRps;
if (dPoc > 0 && use_delta_flag[RefRPS->NumNegativePics + j]) {
stRPS->DeltaPocS1[i] = dPoc;
stRPS->UsedByCurrPicS1[i++] =
used_by_curr_pic_flag[RefRPS->NumNegativePics + j];
}
}
stRPS->NumPositivePics = i;
} else {
/* 7-49 */
READ_UE_ALLOWED (nr, stRPS->NumNegativePics, 0,
sps->max_dec_pic_buffering_minus1[sps->max_sub_layers_minus1]);
/* 7-50 */
READ_UE_ALLOWED (nr, stRPS->NumPositivePics, 0,
(sps->max_dec_pic_buffering_minus1[sps->max_sub_layers_minus1] -
stRPS->NumNegativePics));
for (i = 0; i < stRPS->NumNegativePics; i++) {
READ_UE_ALLOWED (nr, delta_poc_s0_minus1[i], 0, 32767);
/* 7-51 */
READ_UINT8 (nr, stRPS->UsedByCurrPicS0[i], 1);
if (i == 0) {
/* 7-53 */
stRPS->DeltaPocS0[i] = -(delta_poc_s0_minus1[i] + 1);
} else {
/* 7-55 */
stRPS->DeltaPocS0[i] =
stRPS->DeltaPocS0[i - 1] - (delta_poc_s0_minus1[i] + 1);
}
}
for (j = 0; j < stRPS->NumPositivePics; j++) {
READ_UE_ALLOWED (nr, delta_poc_s1_minus1[j], 0, 32767);
/* 7-52 */
READ_UINT8 (nr, stRPS->UsedByCurrPicS1[j], 1);
if (j == 0) {
/* 7-54 */
stRPS->DeltaPocS1[j] = delta_poc_s1_minus1[j] + 1;
} else {
/* 7-56 */
stRPS->DeltaPocS1[j] =
stRPS->DeltaPocS1[j - 1] + (delta_poc_s1_minus1[j] + 1);
}
}
/* 7-57 */
stRPS->NumDeltaPocs = stRPS->NumPositivePics + stRPS->NumNegativePics;
}
return TRUE;
error:
GST_WARNING ("error parsing \"ShortTermRefPicSet Parameters\"");
return FALSE;
}
static gboolean
gst_h265_slice_parse_ref_pic_list_modification (GstH265SliceHdr * slice,
NalReader * nr, gint NumPocTotalCurr)
{
guint i;
GstH265RefPicListModification *rpl_mod = &slice->ref_pic_list_modification;
const guint n = ceil_log2 (NumPocTotalCurr);
/* set default values */
rpl_mod->ref_pic_list_modification_flag_l0 = 0;
rpl_mod->ref_pic_list_modification_flag_l1 = 0;
for (i = 0; i < slice->num_ref_idx_l0_active_minus1; i++)
rpl_mod->list_entry_l0[i] = 0;
for (i = 0; i <= slice->num_ref_idx_l1_active_minus1; i++)
rpl_mod->list_entry_l1[i] = 0;
READ_UINT8 (nr, rpl_mod->ref_pic_list_modification_flag_l0, 1);
if (rpl_mod->ref_pic_list_modification_flag_l0) {
for (i = 0; i < slice->num_ref_idx_l0_active_minus1; i++) {
READ_UINT32 (nr, rpl_mod->list_entry_l0[i], n);
CHECK_ALLOWED (rpl_mod->list_entry_l0[i], 0, (NumPocTotalCurr - 1));
}
}
if (GST_H265_IS_B_SLICE (slice)) {
READ_UINT8 (nr, rpl_mod->ref_pic_list_modification_flag_l1, 1);
if (rpl_mod->ref_pic_list_modification_flag_l1)
for (i = 0; i <= slice->num_ref_idx_l1_active_minus1; i++) {
READ_UINT32 (nr, rpl_mod->list_entry_l1[i], n);
CHECK_ALLOWED (rpl_mod->list_entry_l1[i], 0, (NumPocTotalCurr - 1));
}
}
return TRUE;
error:
GST_WARNING ("error parsing \"Prediction weight table\"");
return FALSE;
}
static gboolean
gst_h265_slice_parse_pred_weight_table (GstH265SliceHdr * slice, NalReader * nr)
{
GstH265PredWeightTable *p;
gint i, j;
GstH265PPS *pps = slice->pps;
GstH265SPS *sps = pps->sps;
GST_DEBUG ("parsing \"Prediction weight table\"");
p = &slice->pred_weight_table;
READ_UE_ALLOWED (nr, p->luma_log2_weight_denom, 0, 7);
/* set default values */
for (i = 0; i < G_N_ELEMENTS (p->chroma_weight_l0_flag); i++) {
p->chroma_weight_l0_flag[i] = 0;
p->luma_offset_l0[i] = 0;
}
if (GST_H265_IS_B_SLICE (slice)) {
for (i = 0; i < G_N_ELEMENTS (p->luma_weight_l1_flag); i++) {
p->chroma_weight_l1_flag[i] = 0;
p->luma_offset_l1[i] = 0;
}
}
if (sps->chroma_format_idc != 0)
READ_SE_ALLOWED (nr, p->delta_chroma_log2_weight_denom, 0, 7);
for (i = 0; i <= slice->num_ref_idx_l0_active_minus1; i++)
READ_UINT8 (nr, p->luma_weight_l0_flag[i], 1);
if (sps->chroma_format_idc != 0)
for (i = 0; i <= slice->num_ref_idx_l0_active_minus1; i++)
READ_UINT8 (nr, p->chroma_weight_l0_flag[i], 1);
for (i = 0; i <= slice->num_ref_idx_l0_active_minus1; i++) {
if (p->luma_weight_l0_flag[i]) {
READ_SE_ALLOWED (nr, p->delta_luma_weight_l0[i], -128, 127);
READ_SE_ALLOWED (nr, p->luma_offset_l0[i], -128, 127);
}
if (p->chroma_weight_l0_flag[i])
for (j = 0; j < 2; j++) {
READ_SE_ALLOWED (nr, p->delta_chroma_weight_l0[i][j], -128, 127);
READ_SE_ALLOWED (nr, p->delta_chroma_offset_l0[i][j], -512, 511);
}
}
if (GST_H265_IS_B_SLICE (slice)) {
for (i = 0; i <= slice->num_ref_idx_l1_active_minus1; i++)
READ_UINT8 (nr, p->luma_weight_l1_flag[i], 1);
if (sps->chroma_format_idc != 0)
for (i = 0; i <= slice->num_ref_idx_l1_active_minus1; i++)
READ_UINT8 (nr, p->chroma_weight_l1_flag[i], 1);
for (i = 0; i <= slice->num_ref_idx_l1_active_minus1; i++) {
if (p->luma_weight_l1_flag[i]) {
READ_SE_ALLOWED (nr, p->delta_luma_weight_l1[i], -128, 127);
READ_SE_ALLOWED (nr, p->luma_offset_l1[i], -128, 127);
}
if (p->chroma_weight_l1_flag[i])
for (j = 0; j < 2; j++) {
READ_SE_ALLOWED (nr, p->delta_chroma_weight_l1[i][j], -128, 127);
READ_SE_ALLOWED (nr, p->delta_chroma_offset_l1[i][j], -512, 511);
}
}
}
return TRUE;
error:
GST_WARNING ("error parsing \"Prediction weight table\"");
return FALSE;
}
static GstH265ParserResult
gst_h265_parser_parse_buffering_period (GstH265Parser * parser,
GstH265BufferingPeriod * per, NalReader * nr)
{
GstH265SPS *sps;
guint8 sps_id;
guint i;
guint n;
GST_DEBUG ("parsing \"Buffering period\"");
READ_UE_ALLOWED (nr, sps_id, 0, GST_H265_MAX_SPS_COUNT - 1);
sps = gst_h265_parser_get_sps (parser, sps_id);
if (!sps) {
GST_WARNING ("couldn't find associated sequence parameter set with id: %d",
sps_id);
return GST_H265_PARSER_BROKEN_LINK;
}
per->sps = sps;
/* set default values if not present */
per->irap_cpb_params_present_flag = 0;
per->cpb_delay_offset = 0;
per->dpb_delay_offset = 0;
if (sps->vui_parameters_present_flag) {
GstH265VUIParams *vui = &sps->vui_params;
GstH265HRDParams *hrd = &vui->hrd_params;
if (!hrd->sub_pic_hrd_params_present_flag)
READ_UINT8 (nr, per->irap_cpb_params_present_flag, 1);
if (per->irap_cpb_params_present_flag) {
READ_UINT8 (nr, per->cpb_delay_offset,
(hrd->au_cpb_removal_delay_length_minus1 + 1));
READ_UINT8 (nr, per->dpb_delay_offset,
(hrd->dpb_output_delay_length_minus1 + 1));
}
n = hrd->initial_cpb_removal_delay_length_minus1 + 1;
READ_UINT8 (nr, per->concatenation_flag, 1);
READ_UINT8 (nr, per->au_cpb_removal_delay_delta_minus1,
(hrd->au_cpb_removal_delay_length_minus1 + 1));
if (hrd->nal_hrd_parameters_present_flag) {
for (i = 0; i <= hrd->cpb_cnt_minus1[i]; i++) {
READ_UINT8 (nr, per->nal_initial_cpb_removal_delay[i], n);
READ_UINT8 (nr, per->nal_initial_cpb_removal_offset[i], n);
if (hrd->sub_pic_hrd_params_present_flag
|| per->irap_cpb_params_present_flag) {
READ_UINT8 (nr, per->nal_initial_alt_cpb_removal_delay[i], n);
READ_UINT8 (nr, per->nal_initial_alt_cpb_removal_offset[i], n);
}
}
}
if (hrd->vcl_hrd_parameters_present_flag) {
for (i = 0; i <= hrd->cpb_cnt_minus1[i]; i++) {
READ_UINT8 (nr, per->vcl_initial_cpb_removal_delay[i], n);
READ_UINT8 (nr, per->vcl_initial_cpb_removal_offset[i], n);
if (hrd->sub_pic_hrd_params_present_flag
|| per->irap_cpb_params_present_flag) {
READ_UINT8 (nr, per->vcl_initial_alt_cpb_removal_delay[i], n);
READ_UINT8 (nr, per->vcl_initial_alt_cpb_removal_offset[i], n);
}
}
}
}
return GST_H265_PARSER_OK;
error:
GST_WARNING ("error parsing \"Buffering period\"");
return GST_H265_PARSER_ERROR;
}
static GstH265ParserResult
gst_h265_parser_parse_pic_timing (GstH265Parser * parser,
GstH265PicTiming * tim, NalReader * nr)
{
GstH265ProfileTierLevel *profile_tier_level;
guint i;
GST_DEBUG ("parsing \"Picture timing\"");
if (!parser->last_sps || !parser->last_sps->valid) {
GST_WARNING ("didn't get the associated sequence paramater set for the "
"current access unit");
goto error;
}
profile_tier_level = &parser->last_sps->profile_tier_level;
/* set default values */
tim->pic_struct = 0;
if (!profile_tier_level->progressive_source_flag
&& profile_tier_level->interlaced_source_flag)
tim->source_scan_type = 0;
else if (profile_tier_level->progressive_source_flag
&& !profile_tier_level->interlaced_source_flag)
tim->source_scan_type = 1;
else
tim->source_scan_type = 2;
if (parser->last_sps->vui_parameters_present_flag) {
GstH265VUIParams *vui = &parser->last_sps->vui_params;
if (vui->frame_field_info_present_flag) {
READ_UINT8 (nr, tim->pic_struct, 4);
READ_UINT8 (nr, tim->source_scan_type, 2);
READ_UINT8 (nr, tim->duplicate_flag, 1);
} else {
/* set default values */
tim->pic_struct = 0;
}
if (vui->hrd_parameters_present_flag) {
GstH265HRDParams *hrd = &vui->hrd_params;
READ_UINT8 (nr, tim->au_cpb_removal_delay_minus1,
(hrd->au_cpb_removal_delay_length_minus1 + 1));
READ_UINT8 (nr, tim->pic_dpb_output_delay,
(hrd->dpb_output_delay_length_minus1 + 1));
if (hrd->sub_pic_hrd_params_present_flag)
READ_UINT8 (nr, tim->pic_dpb_output_du_delay,
(hrd->dpb_output_delay_du_length_minus1 + 1));
if (hrd->sub_pic_hrd_params_present_flag
&& hrd->sub_pic_cpb_params_in_pic_timing_sei_flag) {
READ_UE (nr, tim->num_decoding_units_minus1);
READ_UINT8 (nr, tim->du_common_cpb_removal_delay_flag, 1);
if (tim->du_common_cpb_removal_delay_flag)
READ_UINT8 (nr, tim->du_common_cpb_removal_delay_increment_minus1,
(hrd->du_cpb_removal_delay_increment_length_minus1 + 1));
tim->num_nalus_in_du_minus1 =
g_new0 (guint32, (tim->num_decoding_units_minus1 + 1));
tim->du_cpb_removal_delay_increment_minus1 =
g_new0 (guint8, (tim->num_decoding_units_minus1 + 1));
for (i = 0; i <= (tim->num_decoding_units_minus1 + 1); i++) {
READ_UE (nr, tim->num_nalus_in_du_minus1[i]);
if (!tim->du_common_cpb_removal_delay_flag
&& (i < tim->num_decoding_units_minus1))
READ_UINT8 (nr, tim->du_cpb_removal_delay_increment_minus1[i],
(hrd->du_cpb_removal_delay_increment_length_minus1 + 1));
}
}
}
}
return GST_H265_PARSER_OK;
error:
GST_WARNING ("error parsing \"Picture timing\"");
return GST_H265_PARSER_ERROR;
}
/******** API *************/
/**
* gst_h265_parser_new:
*
* Creates a new #GstH265Parser. It should be freed with
* gst_h265_parser_free after use.
*
* Returns: a new #GstH265Parser
*/
GstH265Parser *
gst_h265_parser_new (void)
{
GstH265Parser *parser;
parser = g_slice_new0 (GstH265Parser);
INITIALIZE_DEBUG_CATEGORY;
return parser;
}
/**
* gst_h265_parser_free:
* @parser: the #GstH265Parser to free
*
* Frees @parser and sets it to %NULL
*/
void
gst_h265_parser_free (GstH265Parser * parser)
{
g_slice_free (GstH265Parser, parser);
parser = NULL;
}
/**
* gst_h265_parser_identify_nalu_unchecked:
* @parser: a #GstH265Parser
* @data: The data to parse
* @offset: the offset from which to parse @data
* @size: the size of @data
* @nalu: The #GstH265NalUnit where to store parsed nal headers
*
* Parses @data and fills @nalu from the next nalu data from @data.
*
* This differs from @gst_h265_parser_identify_nalu in that it doesn't
* check whether the packet is complete or not.
*
* Note: Only use this function if you already know the provided @data
* is a complete NALU, else use @gst_h265_parser_identify_nalu.
*
* Returns: a #GstH265ParserResult
*/
GstH265ParserResult
gst_h265_parser_identify_nalu_unchecked (GstH265Parser * parser,
const guint8 * data, guint offset, gsize size, GstH265NalUnit * nalu)
{
gint off1;
if (size < offset + 4) {
GST_DEBUG ("Can't parse, buffer has too small size %" G_GSIZE_FORMAT
", offset %u", size, offset);
return GST_H265_PARSER_ERROR;
}
off1 = scan_for_start_codes (data + offset, size - offset);
if (off1 < 0) {
GST_DEBUG ("No start code prefix in this buffer");
return GST_H265_PARSER_NO_NAL;
}
if (offset + off1 == size - 1) {
GST_DEBUG ("Missing data to identify nal unit");
return GST_H265_PARSER_ERROR;
}
nalu->sc_offset = offset + off1;
/* sc might have 2 or 3 0-bytes */
if (nalu->sc_offset > 0 && data[nalu->sc_offset - 1] == 00)
nalu->sc_offset--;
nalu->offset = offset + off1 + 3;
nalu->data = (guint8 *) data;
nalu->size = size - nalu->offset;
if (!gst_h265_parse_nalu_header (nalu)) {
GST_WARNING ("error parsing \"NAL unit header\"");
nalu->size = 0;
return GST_H265_PARSER_BROKEN_DATA;
}
nalu->valid = TRUE;
if (nalu->type == GST_H265_NAL_EOS || nalu->type == GST_H265_NAL_EOB) {
GST_DEBUG ("end-of-seq or end-of-stream nal found");
nalu->size = 0;
return GST_H265_PARSER_OK;
}
return GST_H265_PARSER_OK;
}
/**
* gst_h265_parser_identify_nalu:
* @parser: a #GstH265Parser
* @data: The data to parse
* @offset: the offset from which to parse @data
* @size: the size of @data
* @nalu: The #GstH265NalUnit where to store parsed nal headers
*
* Parses @data and fills @nalu from the next nalu data from @data
*
* Returns: a #GstH265ParserResult
*/
GstH265ParserResult
gst_h265_parser_identify_nalu (GstH265Parser * parser,
const guint8 * data, guint offset, gsize size, GstH265NalUnit * nalu)
{
GstH265ParserResult res;
gint off2;
res =
gst_h265_parser_identify_nalu_unchecked (parser, data, offset, size,
nalu);
if (res != GST_H265_PARSER_OK || nalu->size == 0)
goto beach;
off2 = scan_for_start_codes (data + nalu->offset, size - nalu->offset);
if (off2 < 0) {
GST_DEBUG ("Nal start %d, No end found", nalu->offset);
return GST_H265_PARSER_NO_NAL_END;
}
/* Mini performance improvement:
* We could have a way to store how many 0s were skipped to avoid
* parsing them again on the next NAL */
while (off2 > 0 && data[nalu->offset + off2 - 1] == 00)
off2--;
nalu->size = off2;
if (nalu->size < 2)
return GST_H265_PARSER_BROKEN_DATA;
GST_DEBUG ("Complete nal found. Off: %d, Size: %d", nalu->offset, nalu->size);
beach:
return res;
}
/**
* gst_h265_parser_identify_nalu_hevc:
* @parser: a #GstH265Parser
* @data: The data to parse, must be the beging of the Nal unit
* @offset: the offset from which to parse @data
* @size: the size of @data
* @nal_length_size: the size in bytes of the HEVC nal length prefix.
* @nalu: The #GstH265NalUnit where to store parsed nal headers
*
* Parses @data and sets @nalu.
*
* Returns: a #GstH265ParserResult
*/
GstH265ParserResult
gst_h265_parser_identify_nalu_hevc (GstH265Parser * parser,
const guint8 * data, guint offset, gsize size, guint8 nal_length_size,
GstH265NalUnit * nalu)
{
GstBitReader br;
if (size < offset + nal_length_size) {
GST_DEBUG ("Can't parse, buffer has too small size %" G_GSIZE_FORMAT
", offset %u", size, offset);
return GST_H265_PARSER_ERROR;
}
size = size - offset;
gst_bit_reader_init (&br, data + offset, size);
nalu->size = gst_bit_reader_get_bits_uint32_unchecked (&br,
nal_length_size * 8);
nalu->sc_offset = offset;
nalu->offset = offset + nal_length_size;
if (size < nalu->size + nal_length_size) {
nalu->size = 0;
return GST_H265_PARSER_NO_NAL_END;
}
nalu->data = (guint8 *) data;
if (!gst_h265_parse_nalu_header (nalu)) {
GST_WARNING ("error parsing \"NAL unit header\"");
nalu->size = 0;
return GST_H265_PARSER_BROKEN_DATA;
}
if (nalu->size < 2)
return GST_H265_PARSER_BROKEN_DATA;
nalu->valid = TRUE;
return GST_H265_PARSER_OK;
}
/**
* gst_h265_parser_parse_nal:
* @parser: a #GstH265Parser
* @nalu: The #GstH265NalUnit to parse
*
* This function should be called in the case one doesn't need to
* parse a specific structure. It is necessary to do so to make
* sure @parser is up to date.
*
* Returns: a #GstH265ParserResult
*/
GstH265ParserResult
gst_h265_parser_parse_nal (GstH265Parser * parser, GstH265NalUnit * nalu)
{
GstH265VPS vps;
GstH265SPS sps;
GstH265PPS pps;
switch (nalu->type) {
case GST_H265_NAL_VPS:
return gst_h265_parser_parse_vps (parser, nalu, &vps);
break;
case GST_H265_NAL_SPS:
return gst_h265_parser_parse_sps (parser, nalu, &sps, FALSE);
break;
case GST_H265_NAL_PPS:
return gst_h265_parser_parse_pps (parser, nalu, &pps);
}
return GST_H265_PARSER_OK;
}
/**
* gst_h265_parser_parse_vps:
* @parser: a #GstH265Parser
* @nalu: The #GST_H265_NAL_VPS #GstH265NalUnit to parse
* @vps: The #GstH265VPS to fill.
*
* Parses @data, and fills the @vps structure.
*
* Returns: a #GstH265ParserResult
*/
GstH265ParserResult
gst_h265_parser_parse_vps (GstH265Parser * parser, GstH265NalUnit * nalu,
GstH265VPS * vps)
{
GstH265ParserResult res = gst_h265_parse_vps (nalu, vps);
if (res == GST_H265_PARSER_OK) {
GST_DEBUG ("adding video parameter set with id: %d to array", vps->id);
parser->vps[vps->id] = *vps;
parser->last_vps = &parser->vps[vps->id];
}
return res;
}
/**
* gst_h265_parse_vps:
* @nalu: The #GST_H265_NAL_VPS #GstH265NalUnit to parse
* @sps: The #GstH265VPS to fill.
*
* Parses @data, and fills the @vps structure.
*
* Returns: a #GstH265ParserResult
*/
GstH265ParserResult
gst_h265_parse_vps (GstH265NalUnit * nalu, GstH265VPS * vps)
{
NalReader nr;
guint i, j;
INITIALIZE_DEBUG_CATEGORY;
GST_DEBUG ("parsing VPS");
nal_reader_init (&nr, nalu->data + nalu->offset + nalu->header_bytes,
nalu->size - nalu->header_bytes);
memset (&vps->profile_tier_level, 0, sizeof (vps->profile_tier_level));
memset (&vps->hrd_params, 0, sizeof (vps->hrd_params));
vps->cprms_present_flag = 1;
READ_UINT8 (&nr, vps->id, 4);
/* skip reserved_three_2bits */
if (!nal_reader_skip (&nr, 2))
goto error;
READ_UINT8 (&nr, vps->max_layers_minus1, 6);
READ_UINT8 (&nr, vps->max_sub_layers_minus1, 3);
READ_UINT8 (&nr, vps->temporal_id_nesting_flag, 1);
/* skip reserved_0xffff_16bits */
if (!nal_reader_skip (&nr, 16))
goto error;
if (!gst_h265_parse_profile_tier_level (&vps->profile_tier_level, &nr,
vps->max_sub_layers_minus1))
goto error;
READ_UINT8 (&nr, vps->sub_layer_ordering_info_present_flag, 1);
for (i =
(vps->sub_layer_ordering_info_present_flag ? 0 :
vps->max_sub_layers_minus1); i <= vps->max_sub_layers_minus1; i++) {
READ_UE_ALLOWED (&nr, vps->max_dec_pic_buffering_minus1[i], 0,
G_MAXUINT32 - 1);
READ_UE_ALLOWED (&nr, vps->max_num_reorder_pics[i], 0,
vps->max_dec_pic_buffering_minus1[i]);
READ_UE_ALLOWED (&nr, vps->max_latency_increase_plus1[i], 0,
G_MAXUINT32 - 1);
}
/* setting default values if vps->sub_layer_ordering_info_present_flag is zero */
if (!vps->sub_layer_ordering_info_present_flag && vps->max_sub_layers_minus1) {
for (i = 0; i <= (vps->max_sub_layers_minus1 - 1); i++) {
vps->max_dec_pic_buffering_minus1[i] =
vps->max_dec_pic_buffering_minus1[vps->max_sub_layers_minus1];
vps->max_num_reorder_pics[i] =
vps->max_num_reorder_pics[vps->max_sub_layers_minus1];
vps->max_latency_increase_plus1[i] =
vps->max_latency_increase_plus1[vps->max_sub_layers_minus1];
}
}
READ_UINT8 (&nr, vps->max_layer_id, 6);
CHECK_ALLOWED (vps->max_layer_id, 0, 0);
READ_UE_ALLOWED (&nr, vps->num_layer_sets_minus1, 0, 1023);
CHECK_ALLOWED (vps->num_layer_sets_minus1, 0, 0);
for (i = 1; i <= vps->num_layer_sets_minus1; i++)
for (j = 0; j <= vps->max_layer_id; j++)
nal_reader_skip (&nr, 1);
READ_UINT8 (&nr, vps->timing_info_present_flag, 1);
if (vps->timing_info_present_flag) {
READ_UINT32 (&nr, vps->num_units_in_tick, 32);
READ_UINT32 (&nr, vps->time_scale, 32);
READ_UINT8 (&nr, vps->poc_proportional_to_timing_flag, 1);
if (vps->poc_proportional_to_timing_flag)
READ_UE_ALLOWED (&nr, vps->num_ticks_poc_diff_one_minus1, 0,
G_MAXUINT32 - 1);
READ_UE_ALLOWED (&nr, vps->num_hrd_parameters, 0, 1024);
CHECK_ALLOWED (vps->num_hrd_parameters, 0, 1);
if (vps->num_hrd_parameters) {
READ_UE_ALLOWED (&nr, vps->hrd_layer_set_idx, 0, 1023);
CHECK_ALLOWED (vps->hrd_layer_set_idx, 0, 0);
if (!gst_h265_parse_hrd_parameters (&vps->hrd_params, &nr,
vps->cprms_present_flag, vps->max_sub_layers_minus1))
goto error;
}
}
READ_UINT8 (&nr, vps->vps_extension, 1);
vps->valid = TRUE;
return GST_H265_PARSER_OK;
error:
GST_WARNING ("error parsing \"Video parameter set\"");
vps->valid = FALSE;
return GST_H265_PARSER_ERROR;
}
/**
* gst_h265_parser_parse_sps:
* @parser: a #GstH265Parser
* @nalu: The #GST_H265_NAL_SPS #GstH265NalUnit to parse
* @sps: The #GstH265SPS to fill.
* @parse_vui_params: Whether to parse the vui_params or not
*
* Parses @data, and fills the @sps structure.
*
* Returns: a #GstH265ParserResult
*/
GstH265ParserResult
gst_h265_parser_parse_sps (GstH265Parser * parser, GstH265NalUnit * nalu,
GstH265SPS * sps, gboolean parse_vui_params)
{
GstH265ParserResult res =
gst_h265_parse_sps (parser, nalu, sps, parse_vui_params);
if (res == GST_H265_PARSER_OK) {
GST_DEBUG ("adding sequence parameter set with id: %d to array", sps->id);
parser->sps[sps->id] = *sps;
parser->last_sps = &parser->sps[sps->id];
}
return res;
}
/**
* gst_h265_parse_sps:
* parser: The #GstH265Parser
* @nalu: The #GST_H265_NAL_SPS #GstH265NalUnit to parse
* @sps: The #GstH265SPS to fill.
* @parse_vui_params: Whether to parse the vui_params or not
*
* Parses @data, and fills the @sps structure.
*
* Returns: a #GstH265ParserResult
*/
GstH265ParserResult
gst_h265_parse_sps (GstH265Parser * parser, GstH265NalUnit * nalu,
GstH265SPS * sps, gboolean parse_vui_params)
{
NalReader nr;
GstH265VPS *vps;
guint8 vps_id;
guint i;
GstH265VUIParams *vui = NULL;
INITIALIZE_DEBUG_CATEGORY;
GST_DEBUG ("parsing SPS");
nal_reader_init (&nr, nalu->data + nalu->offset + nalu->header_bytes,
nalu->size - nalu->header_bytes);
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
memset (&sps->profile_tier_level, 0, sizeof (sps->profile_tier_level));
memset (sps->short_term_ref_pic_set, 0, sizeof (sps->short_term_ref_pic_set));
sps->scaling_list_data_present_flag = 0;
sps->separate_colour_plane_flag = 0;
sps->conf_win_left_offset = 0;
sps->conf_win_right_offset = 0;
sps->conf_win_top_offset = 0;
sps->conf_win_bottom_offset = 0;
sps->pcm_loop_filter_disabled_flag = 0;
READ_UINT8 (&nr, vps_id, 4);
vps = gst_h265_parser_get_vps (parser, vps_id);
if (!vps) {
GST_DEBUG ("couldn't find associated video parameter set with id: %d",
vps_id);
}
sps->vps = vps;
READ_UINT8 (&nr, sps->max_sub_layers_minus1, 3);
READ_UINT8 (&nr, sps->temporal_id_nesting_flag, 1);
if (!gst_h265_parse_profile_tier_level (&sps->profile_tier_level, &nr,
sps->max_sub_layers_minus1))
goto error;
READ_UE_ALLOWED (&nr, sps->id, 0, GST_H265_MAX_SPS_COUNT - 1);
READ_UE_ALLOWED (&nr, sps->chroma_format_idc, 0, 3);
if (sps->chroma_format_idc == 3)
READ_UINT8 (&nr, sps->separate_colour_plane_flag, 1);
READ_UE_ALLOWED (&nr, sps->pic_width_in_luma_samples, 1, 16888);
READ_UE_ALLOWED (&nr, sps->pic_height_in_luma_samples, 1, 16888);
READ_UINT8 (&nr, sps->conformance_window_flag, 1);
if (sps->conformance_window_flag) {
READ_UE (&nr, sps->conf_win_left_offset);
READ_UE (&nr, sps->conf_win_right_offset);
READ_UE (&nr, sps->conf_win_top_offset);
READ_UE (&nr, sps->conf_win_bottom_offset);
}
READ_UE_ALLOWED (&nr, sps->bit_depth_luma_minus8, 0, 6);
READ_UE_ALLOWED (&nr, sps->bit_depth_chroma_minus8, 0, 6);
READ_UE_ALLOWED (&nr, sps->log2_max_pic_order_cnt_lsb_minus4, 0, 12);
READ_UINT8 (&nr, sps->sub_layer_ordering_info_present_flag, 1);
for (i =
(sps->sub_layer_ordering_info_present_flag ? 0 :
sps->max_sub_layers_minus1); i <= sps->max_sub_layers_minus1; i++) {
READ_UE_ALLOWED (&nr, sps->max_dec_pic_buffering_minus1[i], 0, 16);
READ_UE_ALLOWED (&nr, sps->max_num_reorder_pics[i], 0,
sps->max_dec_pic_buffering_minus1[i]);
READ_UE_ALLOWED (&nr, sps->max_latency_increase_plus1[i], 0,
G_MAXUINT32 - 1);
}
/* setting default values if sps->sub_layer_ordering_info_present_flag is zero */
if (!sps->sub_layer_ordering_info_present_flag && sps->max_sub_layers_minus1) {
for (i = 0; i <= (sps->max_sub_layers_minus1 - 1); i++) {
sps->max_dec_pic_buffering_minus1[i] =
sps->max_dec_pic_buffering_minus1[sps->max_sub_layers_minus1];
sps->max_num_reorder_pics[i] =
sps->max_num_reorder_pics[sps->max_sub_layers_minus1];
sps->max_latency_increase_plus1[i] =
sps->max_latency_increase_plus1[sps->max_sub_layers_minus1];
}
}
/* The limits are calculted based on the profile_tier_level constraint
* in Annex-A: CtbLog2SizeY = 4 to 6 */
READ_UE_ALLOWED (&nr, sps->log2_min_luma_coding_block_size_minus3, 0, 3);
READ_UE_ALLOWED (&nr, sps->log2_diff_max_min_luma_coding_block_size, 0, 6);
READ_UE_ALLOWED (&nr, sps->log2_min_transform_block_size_minus2, 0, 3);
READ_UE_ALLOWED (&nr, sps->log2_diff_max_min_transform_block_size, 0, 3);
READ_UE_ALLOWED (&nr, sps->max_transform_hierarchy_depth_inter, 0, 4);
READ_UE_ALLOWED (&nr, sps->max_transform_hierarchy_depth_intra, 0, 4);
READ_UINT8 (&nr, sps->scaling_list_enabled_flag, 1);
if (sps->scaling_list_enabled_flag) {
READ_UINT8 (&nr, sps->scaling_list_data_present_flag, 1);
if (sps->scaling_list_data_present_flag)
if (!gst_h265_parser_parse_scaling_lists (&nr, &sps->scaling_list, FALSE))
goto error;
}
READ_UINT8 (&nr, sps->amp_enabled_flag, 1);
READ_UINT8 (&nr, sps->sample_adaptive_offset_enabled_flag, 1);
READ_UINT8 (&nr, sps->pcm_enabled_flag, 1);
if (sps->pcm_enabled_flag) {
READ_UINT8 (&nr, sps->pcm_sample_bit_depth_luma_minus1, 4);
READ_UINT8 (&nr, sps->pcm_sample_bit_depth_chroma_minus1, 4);
READ_UE_ALLOWED (&nr, sps->log2_min_pcm_luma_coding_block_size_minus3, 0,
2);
READ_UE_ALLOWED (&nr, sps->log2_diff_max_min_pcm_luma_coding_block_size, 0,
2);
READ_UINT8 (&nr, sps->pcm_loop_filter_disabled_flag, 1);
}
READ_UE_ALLOWED (&nr, sps->num_short_term_ref_pic_sets, 0, 64);
for (i = 0; i < sps->num_short_term_ref_pic_sets; i++)
if (!gst_h265_parser_parse_short_term_ref_pic_sets
(&sps->short_term_ref_pic_set[i], &nr, i, sps))
goto error;
READ_UINT8 (&nr, sps->long_term_ref_pics_present_flag, 1);
if (sps->long_term_ref_pics_present_flag) {
READ_UE_ALLOWED (&nr, sps->num_long_term_ref_pics_sps, 0, 32);
for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {
READ_UINT16 (&nr, sps->lt_ref_pic_poc_lsb_sps[i],
sps->log2_max_pic_order_cnt_lsb_minus4 + 4);
READ_UINT8 (&nr, sps->used_by_curr_pic_lt_sps_flag[i], 1);
}
}
READ_UINT8 (&nr, sps->temporal_mvp_enabled_flag, 1);
READ_UINT8 (&nr, sps->strong_intra_smoothing_enabled_flag, 1);
READ_UINT8 (&nr, sps->vui_parameters_present_flag, 1);
if (sps->vui_parameters_present_flag && parse_vui_params) {
if (!gst_h265_parse_vui_parameters (sps, &nr))
goto error;
vui = &sps->vui_params;
}
READ_UINT8 (&nr, sps->sps_extension_flag, 1);
/* calculate ChromaArrayType */
if (sps->separate_colour_plane_flag)
sps->chroma_array_type = 0;
else
sps->chroma_array_type = sps->chroma_format_idc;
/* Calculate width and height */
sps->width = sps->pic_width_in_luma_samples;
sps->height = sps->pic_height_in_luma_samples;
if (sps->width < 0 || sps->height < 0) {
GST_WARNING ("invalid width/height in SPS");
goto error;
}
/* ToDo: Add crop_rectangle dimensions */
sps->fps_num = 0;
sps->fps_den = 1;
if (vui && vui->timing_info_present_flag) {
/* derive framerate for progressive stream if the pic_struct
* syntax element is not present in picture timing SEI messages */
/* Fixme: handle other cases also */
if (parse_vui_params && vui->timing_info_present_flag
&& !vui->field_seq_flag && !vui->frame_field_info_present_flag) {
sps->fps_num = vui->time_scale;
sps->fps_den = vui->num_units_in_tick;
GST_LOG ("framerate %d/%d", sps->fps_num, sps->fps_den);
}
} else {
GST_LOG ("No VUI, unknown framerate");
}
sps->valid = TRUE;
return GST_H265_PARSER_OK;
error:
GST_WARNING ("error parsing \"Sequence parameter set\"");
sps->valid = FALSE;
return GST_H265_PARSER_ERROR;
}
/**
* gst_h265_parse_pps:
* @parser: a #GstH265Parser
* @nalu: The #GST_H265_NAL_PPS #GstH265NalUnit to parse
* @pps: The #GstH265PPS to fill.
*
* Parses @data, and fills the @pps structure.
*
* Returns: a #GstH265ParserResult
*/
GstH265ParserResult
gst_h265_parse_pps (GstH265Parser * parser, GstH265NalUnit * nalu,
GstH265PPS * pps)
{
NalReader nr;
GstH265SPS *sps;
gint sps_id;
gint qp_bd_offset;
guint8 i;
INITIALIZE_DEBUG_CATEGORY;
GST_DEBUG ("parsing PPS");
nal_reader_init (&nr, nalu->data + nalu->offset + nalu->header_bytes,
nalu->size - nalu->header_bytes);
READ_UE_ALLOWED (&nr, pps->id, 0, GST_H265_MAX_PPS_COUNT - 1);
READ_UE_ALLOWED (&nr, sps_id, 0, GST_H265_MAX_SPS_COUNT - 1);
sps = gst_h265_parser_get_sps (parser, sps_id);
if (!sps) {
GST_WARNING ("couldn't find associated sequence parameter set with id: %d",
sps_id);
return GST_H265_PARSER_BROKEN_LINK;
}
pps->sps = sps;
qp_bd_offset = 6 * sps->bit_depth_luma_minus8;
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
pps->diff_cu_qp_delta_depth = 0;
pps->num_tile_columns_minus1 = 0;
pps->num_tile_rows_minus1 = 0;
pps->uniform_spacing_flag = 1;
pps->loop_filter_across_tiles_enabled_flag = 1;
pps->deblocking_filter_override_enabled_flag = 0;
pps->deblocking_filter_disabled_flag = 0;
pps->beta_offset_div2 = 0;
pps->tc_offset_div2 = 0;
READ_UINT8 (&nr, pps->dependent_slice_segments_enabled_flag, 1);
READ_UINT8 (&nr, pps->output_flag_present_flag, 1);
READ_UINT8 (&nr, pps->num_extra_slice_header_bits, 3);
READ_UINT8 (&nr, pps->sign_data_hiding_enabled_flag, 1);
READ_UINT8 (&nr, pps->cabac_init_present_flag, 1);
READ_UE_ALLOWED (&nr, pps->num_ref_idx_l0_default_active_minus1, 0, 14);
READ_UE_ALLOWED (&nr, pps->num_ref_idx_l1_default_active_minus1, 0, 14);
READ_SE_ALLOWED (&nr, pps->init_qp_minus26, -(26 + qp_bd_offset), 25);
READ_UINT8 (&nr, pps->constrained_intra_pred_flag, 1);
READ_UINT8 (&nr, pps->transform_skip_enabled_flag, 1);
READ_UINT8 (&nr, pps->cu_qp_delta_enabled_flag, 1);
if (pps->cu_qp_delta_enabled_flag)
READ_UE_ALLOWED (&nr, pps->diff_cu_qp_delta_depth, 0,
sps->log2_diff_max_min_luma_coding_block_size);
READ_SE_ALLOWED (&nr, pps->cb_qp_offset, -12, 12);
READ_SE_ALLOWED (&nr, pps->cr_qp_offset, -12, 12);
READ_UINT8 (&nr, pps->slice_chroma_qp_offsets_present_flag, 1);
READ_UINT8 (&nr, pps->weighted_pred_flag, 1);
READ_UINT8 (&nr, pps->weighted_bipred_flag, 1);
READ_UINT8 (&nr, pps->transquant_bypass_enabled_flag, 1);
READ_UINT8 (&nr, pps->tiles_enabled_flag, 1);
READ_UINT8 (&nr, pps->entropy_coding_sync_enabled_flag, 1);
if (pps->tiles_enabled_flag) {
READ_UE_ALLOWED (&nr, pps->num_tile_columns_minus1, 1, 19);
READ_UE_ALLOWED (&nr, pps->num_tile_rows_minus1, 1, 21);
READ_UINT8 (&nr, pps->uniform_spacing_flag, 1);
if (!pps->uniform_spacing_flag) {
for (i = 0; i < pps->num_tile_columns_minus1; i++)
READ_UE (&nr, pps->column_width_minus1[i]);
for (i = 0; i < pps->num_tile_rows_minus1; i++)
READ_UE (&nr, pps->row_height_minus1[i]);
}
READ_UINT8 (&nr, pps->loop_filter_across_tiles_enabled_flag, 1);
}
READ_UINT8 (&nr, pps->loop_filter_across_slices_enabled_flag, 1);
READ_UINT8 (&nr, pps->deblocking_filter_control_present_flag, 1);
if (pps->deblocking_filter_control_present_flag) {
READ_UINT8 (&nr, pps->deblocking_filter_override_enabled_flag, 1);
READ_UINT8 (&nr, pps->deblocking_filter_disabled_flag, 1);
if (!pps->deblocking_filter_disabled_flag) {
READ_SE_ALLOWED (&nr, pps->beta_offset_div2, -6, 6);
READ_SE_ALLOWED (&nr, pps->tc_offset_div2, -6, +6);
}
}
READ_UINT8 (&nr, pps->scaling_list_data_present_flag, 1);
if (pps->scaling_list_data_present_flag)
if (!gst_h265_parser_parse_scaling_lists (&nr, &pps->scaling_list, FALSE))
goto error;
if (sps->scaling_list_enabled_flag && !sps->scaling_list_data_present_flag
&& !pps->scaling_list_data_present_flag)
if (!gst_h265_parser_parse_scaling_lists (&nr, &pps->scaling_list, TRUE))
goto error;
READ_UINT8 (&nr, pps->lists_modification_present_flag, 1);
READ_UE_ALLOWED (&nr, pps->log2_parallel_merge_level_minus2, 0, 4);
READ_UINT8 (&nr, pps->slice_segment_header_extension_present_flag, 1);
READ_UINT8 (&nr, pps->pps_extension_flag, 1);
pps->valid = TRUE;
return GST_H265_PARSER_OK;
error:
GST_WARNING ("error parsing \"Picture parameter set\"");
pps->valid = FALSE;
return GST_H265_PARSER_ERROR;
}
/**
* gst_h265_parser_parse_pps:
* @parser: a #GstH265Parser
* @nalu: The #GST_H265_NAL_PPS #GstH265NalUnit to parse
* @pps: The #GstH265PPS to fill.
*
* Parses @data, and fills the @pps structure.
*
* Returns: a #GstH265ParserResult
*/
GstH265ParserResult
gst_h265_parser_parse_pps (GstH265Parser * parser,
GstH265NalUnit * nalu, GstH265PPS * pps)
{
GstH265ParserResult res = gst_h265_parse_pps (parser, nalu, pps);
if (res == GST_H265_PARSER_OK) {
GST_DEBUG ("adding picture parameter set with id: %d to array", pps->id);
parser->pps[pps->id] = *pps;
parser->last_pps = &parser->pps[pps->id];
}
return res;
}
/**
* gst_h265_parser_parse_slice_hdr:
* @parser: a #GstH265Parser
* @nalu: The #GST_H265_NAL_SLICE #GstH265NalUnit to parse
* @slice: The #GstH265SliceHdr to fill.
*
* Parses @data, and fills the @slice structure.
* The resulting @slice_hdr structure shall be deallocated with
* gst_h265_slice_hdr_free() when it is no longer needed
*
* Returns: a #GstH265ParserResult
*/
GstH265ParserResult
gst_h265_parser_parse_slice_hdr (GstH265Parser * parser,
GstH265NalUnit * nalu, GstH265SliceHdr * slice)
{
NalReader nr;
gint pps_id;
GstH265PPS *pps;
GstH265SPS *sps;
guint i;
guint CurrRpsIdx = 0;
GstH265ShortTermRefPicSet *stRPS = NULL;
guint32 UsedByCurrPicLt[16];
guint32 PicSizeInCtbsY;
guint32 PicWidthInCtbsY;
guint32 PicHeightInCtbsY;
guint32 CtbSizeY;
guint32 MinCbLog2SizeY;
guint32 CtbLog2SizeY;
gint NumPocTotalCurr = 0;
if (!nalu->size) {
GST_DEBUG ("Invalid Nal Unit");
return GST_H265_PARSER_ERROR;
}
nal_reader_init (&nr, nalu->data + nalu->offset + nalu->header_bytes,
nalu->size - nalu->header_bytes);
GST_DEBUG ("parsing \"Slice header\", slice type");
READ_UINT8 (&nr, slice->first_slice_segment_in_pic_flag, 1);
if (nalu->type >= GST_H265_NAL_SLICE_BLA_W_LP
&& nalu->type <= RESERVED_IRAP_NAL_TYPE_MAX)
READ_UINT8 (&nr, slice->no_output_of_prior_pics_flag, 1);
READ_UE_ALLOWED (&nr, pps_id, 0, GST_H265_MAX_PPS_COUNT - 1);
pps = gst_h265_parser_get_pps (parser, pps_id);
if (!pps) {
GST_WARNING
("couldn't find associated picture parameter set with id: %d", pps_id);
return GST_H265_PARSER_BROKEN_LINK;
}
slice->pps = pps;
sps = pps->sps;
if (!sps) {
GST_WARNING
("couldn't find associated sequence parameter set with id: %d",
pps->id);
return GST_H265_PARSER_BROKEN_LINK;
}
MinCbLog2SizeY = sps->log2_min_luma_coding_block_size_minus3 + 3;
CtbLog2SizeY = MinCbLog2SizeY + sps->log2_diff_max_min_luma_coding_block_size;
CtbSizeY = 1 << CtbLog2SizeY;
PicHeightInCtbsY =
ceil ((gdouble) sps->pic_height_in_luma_samples / (gdouble) CtbSizeY);
PicWidthInCtbsY =
ceil ((gdouble) sps->pic_width_in_luma_samples / (gdouble) CtbSizeY);
PicSizeInCtbsY = PicWidthInCtbsY * PicHeightInCtbsY;
/* set default values for fields that might not be present in the bitstream
* and have valid defaults */
slice->dependent_slice_segment_flag = 0;
slice->segment_address = 0;
slice->pic_output_flag = 1;
slice->pic_order_cnt_lsb = 0;
slice->short_term_ref_pic_set_idx = 0;
slice->num_long_term_sps = 0;
slice->num_long_term_pics = 0;
for (i = 0; i < 16; i++) {
slice->lt_idx_sps[i] = 0;
slice->delta_poc_msb_cycle_lt[i] = 0;
}
slice->temporal_mvp_enabled_flag = 0;
slice->sao_luma_flag = 0;
slice->sao_chroma_flag = 0;
slice->cabac_init_flag = 0;
slice->collocated_from_l0_flag = 1;
slice->cb_qp_offset = 0;
slice->cr_qp_offset = 0;
slice->deblocking_filter_override_flag = 0;
slice->deblocking_filter_disabled_flag = 0;
slice->beta_offset_div2 = pps->beta_offset_div2;
slice->tc_offset_div2 = pps->tc_offset_div2;
slice->loop_filter_across_slices_enabled_flag =
pps->loop_filter_across_slices_enabled_flag;
slice->num_entry_point_offsets = 0;
slice->entry_point_offset_minus1 = NULL;
if (!slice->first_slice_segment_in_pic_flag) {
const guint n = ceil_log2 (PicSizeInCtbsY);
if (pps->dependent_slice_segments_enabled_flag)
READ_UINT8 (&nr, slice->dependent_slice_segment_flag, 1);
/* sice_segment_address parsing */
READ_UINT32 (&nr, slice->segment_address, n);
}
if (!slice->dependent_slice_segment_flag) {
for (i = 0; i < pps->num_extra_slice_header_bits; i++)
nal_reader_skip (&nr, 1);
READ_UE_ALLOWED (&nr, slice->type, 0, 63);
if (pps->output_flag_present_flag)
READ_UINT8 (&nr, slice->pic_output_flag, 1);
if (sps->separate_colour_plane_flag == 1)
READ_UINT8 (&nr, slice->colour_plane_id, 2);
if ((nalu->type != GST_H265_NAL_SLICE_IDR_W_RADL)
&& (nalu->type != GST_H265_NAL_SLICE_IDR_N_LP)) {
READ_UINT16 (&nr, slice->pic_order_cnt_lsb,
(sps->log2_max_pic_order_cnt_lsb_minus4 + 4));
CHECK_ALLOWED (slice->pic_order_cnt_lsb, 0, G_MAXUINT16);
READ_UINT8 (&nr, slice->short_term_ref_pic_set_sps_flag, 1);
if (!slice->short_term_ref_pic_set_sps_flag) {
if (!gst_h265_parser_parse_short_term_ref_pic_sets
(&slice->short_term_ref_pic_sets, &nr,
sps->num_short_term_ref_pic_sets, sps))
goto error;
} else if (sps->num_short_term_ref_pic_sets > 1) {
const guint n = ceil_log2 (sps->num_short_term_ref_pic_sets);
READ_UINT8 (&nr, slice->short_term_ref_pic_set_idx, n);
CHECK_ALLOWED (slice->short_term_ref_pic_set_idx, 0,
sps->num_short_term_ref_pic_sets - 1);
}
if (sps->long_term_ref_pics_present_flag) {
guint32 limit;
if (sps->num_long_term_ref_pics_sps > 0)
READ_UE_ALLOWED (&nr, slice->num_long_term_sps, 0,
sps->num_long_term_ref_pics_sps);
READ_UE_ALLOWED (&nr, slice->num_long_term_pics, 0, 16);
limit = slice->num_long_term_sps + slice->num_long_term_pics;
for (i = 0; i < limit; i++) {
if (i < slice->num_long_term_sps) {
if (sps->num_long_term_ref_pics_sps > 1) {
const guint n = ceil_log2 (sps->num_long_term_ref_pics_sps);
READ_UINT8 (&nr, slice->lt_idx_sps[i], n);
}
} else {
READ_UINT32 (&nr, slice->poc_lsb_lt[i],
(sps->log2_max_pic_order_cnt_lsb_minus4 + 4));
READ_UINT8 (&nr, slice->used_by_curr_pic_lt_flag[i], 1);
}
/* calculate UsedByCurrPicLt */
if (i < slice->num_long_term_sps)
UsedByCurrPicLt[i] =
sps->used_by_curr_pic_lt_sps_flag[slice->lt_idx_sps[i]];
else
UsedByCurrPicLt[i] = slice->used_by_curr_pic_lt_flag[i];
READ_UINT8 (&nr, slice->delta_poc_msb_present_flag[i], 1);
if (slice->delta_poc_msb_present_flag[i])
READ_UE (&nr, slice->delta_poc_msb_cycle_lt[i]);
}
}
if (sps->temporal_mvp_enabled_flag)
READ_UINT8 (&nr, slice->temporal_mvp_enabled_flag, 1);
}
if (sps->sample_adaptive_offset_enabled_flag) {
READ_UINT8 (&nr, slice->sao_luma_flag, 1);
READ_UINT8 (&nr, slice->sao_chroma_flag, 1);
}
if (GST_H265_IS_B_SLICE (slice) || GST_H265_IS_P_SLICE (slice)) {
READ_UINT8 (&nr, slice->num_ref_idx_active_override_flag, 1);
if (slice->num_ref_idx_active_override_flag) {
READ_UE_ALLOWED (&nr, slice->num_ref_idx_l0_active_minus1, 0, 14);
if (GST_H265_IS_B_SLICE (slice))
READ_UE_ALLOWED (&nr, slice->num_ref_idx_l1_active_minus1, 0, 14);
} else {
/*set default values */
slice->num_ref_idx_l0_active_minus1 =
pps->num_ref_idx_l0_default_active_minus1;
slice->num_ref_idx_l1_active_minus1 =
pps->num_ref_idx_l1_default_active_minus1;
}
if (pps->lists_modification_present_flag) {
/* calculate NumPocTotalCurr */
if (slice->short_term_ref_pic_set_sps_flag)
CurrRpsIdx = slice->short_term_ref_pic_set_idx;
else
CurrRpsIdx = sps->num_short_term_ref_pic_sets;
stRPS = &sps->short_term_ref_pic_set[CurrRpsIdx];
for (i = 0; i < stRPS->NumNegativePics; i++)
if (stRPS->UsedByCurrPicS0[i])
NumPocTotalCurr++;
for (i = 0; i < stRPS->NumPositivePics; i++)
if (stRPS->UsedByCurrPicS1[i])
NumPocTotalCurr++;
for (i = 0;
i < (slice->num_long_term_sps + slice->num_long_term_pics); i++)
if (UsedByCurrPicLt[i])
NumPocTotalCurr++;
slice->NumPocTotalCurr = NumPocTotalCurr;
if (NumPocTotalCurr > 1)
if (!gst_h265_slice_parse_ref_pic_list_modification (slice, &nr,
NumPocTotalCurr))
goto error;
}
if (GST_H265_IS_B_SLICE (slice))
READ_UINT8 (&nr, slice->mvd_l1_zero_flag, 1);
if (pps->cabac_init_present_flag)
READ_UINT8 (&nr, slice->cabac_init_flag, 1);
if (slice->temporal_mvp_enabled_flag) {
if (GST_H265_IS_B_SLICE (slice))
READ_UINT8 (&nr, slice->collocated_from_l0_flag, 1);
if ((slice->collocated_from_l0_flag
&& slice->num_ref_idx_l0_active_minus1 > 0)
|| (!slice->collocated_from_l0_flag
&& slice->num_ref_idx_l1_active_minus1 > 0)) {
/*fixme: add optimization */
if ((GST_H265_IS_P_SLICE (slice))
|| ((GST_H265_IS_B_SLICE (slice))
&& (slice->collocated_from_l0_flag))) {
READ_UE_ALLOWED (&nr, slice->collocated_ref_idx, 0,
slice->num_ref_idx_l0_active_minus1);
} else if ((GST_H265_IS_B_SLICE (slice))
&& (!slice->collocated_from_l0_flag)) {
READ_UE_ALLOWED (&nr, slice->collocated_ref_idx, 0,
slice->num_ref_idx_l1_active_minus1);
}
}
}
if ((pps->weighted_pred_flag && GST_H265_IS_P_SLICE (slice)) ||
(pps->weighted_bipred_flag && GST_H265_IS_B_SLICE (slice)))
if (!gst_h265_slice_parse_pred_weight_table (slice, &nr))
goto error;
READ_UE_ALLOWED (&nr, slice->five_minus_max_num_merge_cand, 0, 4);
}
READ_SE_ALLOWED (&nr, slice->qp_delta, -87, 77);
if (pps->slice_chroma_qp_offsets_present_flag) {
READ_SE_ALLOWED (&nr, slice->cb_qp_offset, -12, 12);
READ_SE_ALLOWED (&nr, slice->cr_qp_offset, -12, 12);
}
if (pps->deblocking_filter_override_enabled_flag)
READ_UINT8 (&nr, slice->deblocking_filter_override_flag, 1);
if (slice->deblocking_filter_override_flag) {
READ_UINT8 (&nr, slice->deblocking_filter_disabled_flag, 1);
if (!slice->deblocking_filter_disabled_flag) {
READ_SE_ALLOWED (&nr, slice->beta_offset_div2, -6, 6);
READ_SE_ALLOWED (&nr, slice->tc_offset_div2, -6, 6);
}
}
if (pps->loop_filter_across_slices_enabled_flag &&
(slice->sao_luma_flag || slice->sao_chroma_flag ||
!slice->deblocking_filter_disabled_flag))
READ_UINT8 (&nr, slice->loop_filter_across_slices_enabled_flag, 1);
}
if (pps->tiles_enabled_flag || pps->entropy_coding_sync_enabled_flag) {
guint32 offset_max;
if (!pps->tiles_enabled_flag && pps->entropy_coding_sync_enabled_flag)
offset_max = PicHeightInCtbsY - 1;
else if (pps->tiles_enabled_flag && !pps->entropy_coding_sync_enabled_flag)
offset_max =
(pps->num_tile_columns_minus1 + 1) * (pps->num_tile_rows_minus1 + 1) -
1;
else
offset_max = (pps->num_tile_columns_minus1 + 1) * PicHeightInCtbsY - 1;
READ_UE_ALLOWED (&nr, slice->num_entry_point_offsets, 0, offset_max);
if (slice->num_entry_point_offsets > 0) {
READ_UE_ALLOWED (&nr, slice->offset_len_minus1, 0, 31);
slice->entry_point_offset_minus1 =
g_new0 (guint32, slice->num_entry_point_offsets);
for (i = 0; i < slice->num_entry_point_offsets; i++)
READ_UINT32 (&nr, slice->entry_point_offset_minus1[i],
(slice->offset_len_minus1 + 1));
}
}
if (pps->slice_segment_header_extension_present_flag) {
guint16 slice_segment_header_extension_length;
READ_UE_ALLOWED (&nr, slice_segment_header_extension_length, 0, 256);
for (i = 0; i < slice_segment_header_extension_length; i++)
if (!nal_reader_skip (&nr, 8))
goto error;
}
slice->header_size = nal_reader_get_pos (&nr);
slice->n_emulation_prevention_bytes = nal_reader_get_epb_count (&nr);
return GST_H265_PARSER_OK;
error:
GST_WARNING ("error parsing \"Slice header\"");
gst_h265_slice_hdr_free (slice);
return GST_H265_PARSER_ERROR;
}
/**
* gst_h265_parser_parse_sei:
* @parser: a #GstH265Parser
* @nalu: The #GST_H265_NAL_SEI #GstH265NalUnit to parse
* @sei: The #GstH265SEIMessage to fill.
*
* Parses @data, and fills the @sei structures.
* The resulting @sei structure shall be deallocated with
* gst_h265_sei_free() when it is no longer needed
*
* Returns: a #GstH265ParserResult
*/
GstH265ParserResult
gst_h265_parser_parse_sei (GstH265Parser * parser,
GstH265NalUnit * nalu, GstH265SEIMessage * sei)
{
NalReader nr;
guint32 payloadSize;
guint8 payload_type_byte, payload_size_byte;
#ifndef GST_DISABLE_GST_DEBUG
guint remaining, payload_size;
#endif
GstH265ParserResult res;
GST_DEBUG ("parsing \"Sei message\"");
nal_reader_init (&nr, nalu->data + nalu->offset + 1, nalu->size - 1);
/* init */
memset (sei, 0, sizeof (*sei));
sei->payloadType = 0;
do {
READ_UINT8 (&nr, payload_type_byte, 8);
sei->payloadType += payload_type_byte;
} while (payload_type_byte == 0xff);
payloadSize = 0;
do {
READ_UINT8 (&nr, payload_size_byte, 8);
payloadSize += payload_size_byte;
}
while (payload_size_byte == 0xff);
#ifndef GST_DISABLE_GST_DEBUG
remaining = nal_reader_get_remaining (&nr) * 8;
payload_size = payloadSize < remaining ? payloadSize : remaining;
GST_DEBUG
("SEI message received: payloadType %u, payloadSize = %u bytes",
sei->payloadType, payload_size);
#endif
if (sei->payloadType == GST_H265_SEI_BUF_PERIOD) {
/* size not set; might depend on emulation_prevention_three_byte */
res = gst_h265_parser_parse_buffering_period (parser,
&sei->payload.buffering_period, &nr);
} else if (sei->payloadType == GST_H265_SEI_PIC_TIMING) {
/* size not set; might depend on emulation_prevention_three_byte */
res = gst_h265_parser_parse_pic_timing (parser,
&sei->payload.pic_timing, &nr);
} else
res = GST_H265_PARSER_OK;
return res;
error:
GST_WARNING ("error parsing \"Sei message\"");
gst_h265_sei_free (sei);
return GST_H265_PARSER_ERROR;
}
/**
* gst_h265_slice_hdr_copy:
* @dst_slice: The destination #GstH265SliceHdr to copy into
* @src_slice: The source #GstH265SliceHdr to copy from
*
* Copies @src_slice into @dst_slice
*
* Returns: %TRUE if everything went fine, %FALSE otherwise
*/
gboolean
gst_h265_slice_hdr_copy (GstH265SliceHdr * dst_slice,
const GstH265SliceHdr * src_slice)
{
guint i;
g_return_val_if_fail (dst_slice != NULL, FALSE);
g_return_val_if_fail (src_slice != NULL, FALSE);
gst_h265_slice_hdr_free (dst_slice);
*dst_slice = *src_slice;
if (dst_slice->num_entry_point_offsets > 0) {
dst_slice->entry_point_offset_minus1 =
g_new0 (guint32, dst_slice->num_entry_point_offsets);
for (i = 0; i < dst_slice->num_entry_point_offsets; i++)
dst_slice->entry_point_offset_minus1[i] =
src_slice->entry_point_offset_minus1[i];
}
return TRUE;
}
/**
* gst_h265_slice_hdr_free:
* slice_hdr: The #GstH265SliceHdr to free
*
* Frees @slice_hdr fields.
*/
void
gst_h265_slice_hdr_free (GstH265SliceHdr * slice_hdr)
{
g_return_if_fail (slice_hdr != NULL);
if (slice_hdr->num_entry_point_offsets > 0)
g_free (slice_hdr->entry_point_offset_minus1);
slice_hdr->entry_point_offset_minus1 = 0;
}
/**
* gst_h265_sei_copy:
* @dst_sei: The destination #GstH265SEIMessage to copy into
* @src_sei: The source #GstH265SEIMessage to copy from
*
* Copies @src_sei into @dst_sei
*
* Returns: %TRUE if everything went fine, %FALSE otherwise
*/
gboolean
gst_h265_sei_copy (GstH265SEIMessage * dst_sei,
const GstH265SEIMessage * src_sei)
{
guint i;
g_return_val_if_fail (dst_sei != NULL, FALSE);
g_return_val_if_fail (src_sei != NULL, FALSE);
gst_h265_sei_free (dst_sei);
*dst_sei = *src_sei;
if (dst_sei->payloadType == GST_H265_SEI_PIC_TIMING) {
GstH265PicTiming *dst_pic_timing = &dst_sei->payload.pic_timing;
const GstH265PicTiming *src_pic_timing = &src_sei->payload.pic_timing;
if (dst_pic_timing->num_decoding_units_minus1 > 0) {
dst_pic_timing->num_nalus_in_du_minus1 =
g_new0 (guint32, (dst_pic_timing->num_decoding_units_minus1 + 1));
dst_pic_timing->du_cpb_removal_delay_increment_minus1 =
g_new0 (guint8, (dst_pic_timing->num_decoding_units_minus1 + 1));
for (i = 0; i <= dst_pic_timing->num_decoding_units_minus1; i++) {
dst_pic_timing->num_nalus_in_du_minus1[i] =
src_pic_timing->num_nalus_in_du_minus1[i];
dst_pic_timing->du_cpb_removal_delay_increment_minus1[i] =
src_pic_timing->du_cpb_removal_delay_increment_minus1[i];
}
}
}
return TRUE;
}
/**
* gst_h265_sei_free:
* sei: The #GstH265SEIMessage to free
*
* Frees @sei fields.
*/
void
gst_h265_sei_free (GstH265SEIMessage * sei)
{
g_return_if_fail (sei != NULL);
if (sei->payloadType == GST_H265_SEI_PIC_TIMING) {
GstH265PicTiming *pic_timing = &sei->payload.pic_timing;
if (pic_timing->num_decoding_units_minus1 > 0) {
g_free (pic_timing->num_nalus_in_du_minus1);
g_free (pic_timing->du_cpb_removal_delay_increment_minus1);
}
pic_timing->num_nalus_in_du_minus1 = 0;
pic_timing->du_cpb_removal_delay_increment_minus1 = 0;
}
}
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