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[client] nal: added PPS parser

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This commit is contained in:
Geoffrey McRae 2018-01-05 16:18:28 +11:00
parent c809eeb2a8
commit d6f84ddd12
2 changed files with 136 additions and 16 deletions
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138
client/parsers/nal.c
View File

@ -29,23 +29,27 @@ Place, Suite 330, Boston, MA 02111-1307 USA
struct NAL
{
uint8_t primary_pic_type;
bool primary_pic_type_valid;
uint8_t primary_pic_type;
bool primary_pic_type_valid;
bool sps_valid;
NAL_SPS sps;
int32_t * sps_offset_for_ref_frame;
uint32_t sps_num_ref_frames_in_pic_order_cnt_cycle;
bool sps_valid;
NAL_SPS sps;
int32_t * sps_offset_for_ref_frame;
uint32_t sps_num_ref_frames_in_pic_order_cnt_cycle;
bool vui_valid;
NAL_VUI vui;
NAL_CPB * vui_nal_hrd_parameters_cpb;
uint32_t vui_nal_hrd_parameters_cpb_size;
NAL_CPB * vui_vcl_hrd_parameters_cpb;
uint32_t vui_vcl_hrd_parameters_cpb_size;
bool vui_valid;
NAL_VUI vui;
NAL_CPB * vui_nal_hrd_parameters_cpb;
uint32_t vui_nal_hrd_parameters_cpb_size;
NAL_CPB * vui_vcl_hrd_parameters_cpb;
uint32_t vui_vcl_hrd_parameters_cpb_size;
bool pps_valid;
NAL_PPS pps;
bool pps_valid;
NAL_PPS pps;
NAL_SLICE_GROUP * pps_slice_groups;
uint32_t pps_slice_groups_size;
uint32_t * pps_slice_group_id;
uint32_t pps_slice_group_id_size;
};
bool nal_initialize(NAL * ptr)
@ -57,6 +61,12 @@ bool nal_initialize(NAL * ptr)
void nal_deinitialize(NAL this)
{
if (this->pps_slice_group_id)
free(this->pps_slice_group_id);
if (this->pps_slice_groups)
free(this->pps_slice_groups);
if (this->sps_offset_for_ref_frame)
free(this->sps_offset_for_ref_frame);
@ -392,7 +402,105 @@ static bool parse_nal_sps(NAL this, const uint8_t * src, size_t size, size_t * c
static bool parse_nal_pps(NAL this, const uint8_t * src, size_t size, size_t * const offset)
{
return false;
NAL_PPS * pps = &this->pps;
this->pps_valid = false;
memset(pps, 0, sizeof(NAL_PPS));
pps->pic_parameter_set_id = decode_u_golomb(src, offset);
pps->seq_parameter_set_id = decode_u_golomb(src, offset);
pps->entropy_coding_mode_flag = get_bit(src, offset);
pps->pic_order_present_flag = get_bit(src, offset);
pps->num_slice_groups_minus1 = decode_u_golomb(src, offset);
if (pps->num_slice_groups_minus1 > 0)
{
pps->slice_group_map_type = decode_u_golomb(src, offset);
if (pps->slice_group_map_type == 0 || pps->slice_group_map_type == 2)
{
if (this->pps_slice_groups_size < pps->num_slice_groups_minus1 + 1)
{
this->pps_slice_groups_size = pps->num_slice_groups_minus1 + 1;
this->pps_slice_groups = (NAL_SLICE_GROUP *)realloc(
this->pps_slice_groups, this->pps_slice_groups_size * sizeof(NAL_SLICE_GROUP));
}
pps->slice_groups = this->pps_slice_groups;
memset(pps->slice_groups, 0, (pps->num_slice_groups_minus1 + 1) * sizeof(NAL_SLICE_GROUP));
if (pps->slice_group_map_type == 0)
{
for(uint32_t group = 0; group <= pps->num_slice_groups_minus1; ++group)
pps->slice_groups[group].t0.run_length_minus1 = decode_u_golomb(src, offset);
}
else
{
for(uint32_t group = 0; group < pps->num_slice_groups_minus1; ++group)
{
pps->slice_groups[group].t2.top_left = decode_u_golomb(src, offset);
pps->slice_groups[group].t2.bottom_right = decode_u_golomb(src, offset);
}
}
}
else
{
if (pps->slice_group_map_type == 3 ||
pps->slice_group_map_type == 4 ||
pps->slice_group_map_type == 5)
{
pps->slice_group_change_direction_flag = get_bit(src, offset);
pps->slice_group_change_rate_minus1 = decode_u_golomb(src, offset);
}
else
{
if (pps->slice_group_map_type == 6)
{
pps->pic_size_in_map_units_minus1 = decode_u_golomb(src, offset);
uint32_t slice_groups = pps->pic_size_in_map_units_minus1 + 1;
uint32_t bits = 0;
if ((slice_groups & (slice_groups - 1)) != 0)
++slice_groups;
while(slice_groups > 0)
{
slice_groups >>= 1;
++bits;
}
if (this->pps_slice_group_id_size < pps->pic_size_in_map_units_minus1 + 1)
{
this->pps_slice_group_id_size = pps->pic_size_in_map_units_minus1 + 1;
this->pps_slice_group_id = realloc(this->pps_slice_group_id,
this->pps_slice_group_id_size * sizeof(uint32_t));
}
for(uint32_t group = 0; group <= pps->pic_size_in_map_units_minus1; ++group)
pps->slice_group_id[group] = get_bits(src, offset, bits);
}
else
{
DEBUG_ERROR("Invalid slice_group_map_type: %d", pps->slice_group_map_type);
return false;
}
}
}
}
pps->num_ref_idx_l0_active_minus1 = decode_u_golomb(src, offset);
pps->num_ref_idx_l1_active_minus1 = decode_u_golomb(src, offset);
pps->weighted_pred_flag = get_bit(src, offset);
pps->weighted_bipred_idc = get_bits(src, offset, 2);
pps->pic_init_qp_minus26 = decode_s_golomb(src, offset);
pps->pic_init_qs_minus26 = decode_s_golomb(src, offset);
pps->chroma_qp_index_offset = decode_s_golomb(src, offset);
pps->deblocking_filter_control_present_flag = get_bit(src, offset);
pps->constrained_intra_pred_flag = get_bit(src, offset);
pps->redundant_pic_cnt_present_flag = get_bit(src, offset);
if (!parse_nal_trailing_bits(this, src, size, offset))
return false;
this->pps_valid = true;
return true;
}
bool nal_parse(NAL this, const uint8_t * src, size_t size)

14
client/parsers/nal.h
View File

@ -143,12 +143,24 @@ typedef struct NAL_VUI
}
NAL_VUI;
typedef struct NAL_SLICE_GROUP
typedef struct NAL_SLICE_GROUP_T0
{
uint32_t run_length_minus1;
}
NAL_SLICE_GROUP_T0;
typedef struct NAL_SLICE_GROUP_T2
{
uint32_t top_left;
uint32_t bottom_right;
}
NAL_SLICE_GROUP_T2;
typedef union NAL_SLICE_GROUP
{
NAL_SLICE_GROUP_T0 t0;
NAL_SLICE_GROUP_T2 t2;
}
NAL_SLICE_GROUP;
typedef struct NAL_PPS