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|
/*
* h265.c: Frontend Status Monitor plugin for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
*/
#include <math.h>
#include "log.h"
#include "tools.h"
#include "h265.h"
const cFemonH265::t_DAR cFemonH265::darS[] =
{
{ VIDEO_ASPECT_RATIO_1_1, 100 },
{ VIDEO_ASPECT_RATIO_4_3, 133 },
{ VIDEO_ASPECT_RATIO_16_9, 177 },
{ VIDEO_ASPECT_RATIO_2_21_1, 221 },
{ VIDEO_ASPECT_RATIO_12_11, 109 },
{ VIDEO_ASPECT_RATIO_10_11, 90 },
{ VIDEO_ASPECT_RATIO_16_11, 145 },
{ VIDEO_ASPECT_RATIO_40_33, 121 },
{ VIDEO_ASPECT_RATIO_24_11, 218 },
{ VIDEO_ASPECT_RATIO_20_11, 181 },
{ VIDEO_ASPECT_RATIO_32_11, 290 },
{ VIDEO_ASPECT_RATIO_80_33, 242 },
{ VIDEO_ASPECT_RATIO_18_11, 163 },
{ VIDEO_ASPECT_RATIO_15_11, 136 },
{ VIDEO_ASPECT_RATIO_64_33, 193 },
{ VIDEO_ASPECT_RATIO_160_99, 161 },
{ VIDEO_ASPECT_RATIO_3_2, 150 },
{ VIDEO_ASPECT_RATIO_2_1, 200 }
};
const cFemonH265::t_SAR cFemonH265::sarS[] =
{
{ 0, 0 }, // VIDEO_ASPECT_RATIO_INVALID
{ 1, 1 }, // VIDEO_ASPECT_RATIO_1_1
{ 12, 11 }, // VIDEO_ASPECT_RATIO_12_11
{ 10, 11 }, // VIDEO_ASPECT_RATIO_10_11
{ 16, 11 }, // VIDEO_ASPECT_RATIO_16_11
{ 40, 33 }, // VIDEO_ASPECT_RATIO_40_33
{ 24, 11 }, // VIDEO_ASPECT_RATIO_24_11
{ 20, 11 }, // VIDEO_ASPECT_RATIO_20_11
{ 32, 11 }, // VIDEO_ASPECT_RATIO_32_11
{ 80, 33 }, // VIDEO_ASPECT_RATIO_80_33
{ 18, 11 }, // VIDEO_ASPECT_RATIO_18_11
{ 15, 11 }, // VIDEO_ASPECT_RATIO_15_11
{ 64, 33 }, // VIDEO_ASPECT_RATIO_64_33
{ 160, 99 }, // VIDEO_ASPECT_RATIO_160_99
{ 4, 3 }, // VIDEO_ASPECT_RATIO_4_3
{ 3, 2 }, // VIDEO_ASPECT_RATIO_3_2
{ 2, 1 } // VIDEO_ASPECT_RATIO_2_1
};
const eVideoFormat cFemonH265::videoFormatS[] =
{
VIDEO_FORMAT_COMPONENT,
VIDEO_FORMAT_PAL,
VIDEO_FORMAT_NTSC,
VIDEO_FORMAT_SECAM,
VIDEO_FORMAT_MAC,
VIDEO_FORMAT_UNKNOWN,
VIDEO_FORMAT_RESERVED,
VIDEO_FORMAT_RESERVED
};
cFemonH265::cFemonH265(cFemonVideoIf *videoHandlerP)
: videoHandlerM(videoHandlerP),
widthM(0),
heightM(0),
aspectRatioM(VIDEO_ASPECT_RATIO_INVALID),
formatM(VIDEO_FORMAT_INVALID),
frameRateM(0),
bitRateM(0),
scanM(VIDEO_SCAN_INVALID),
frameFieldInfoPresentFlagM(false)
{
reset();
}
cFemonH265::~cFemonH265()
{
}
bool cFemonH265::processVideo(const uint8_t *bufP, int lenP)
{
uint8_t nal_data[lenP];
bool aud_found = false, sps_found = false, sei_found = true; // SEI temporarily disabled!
const uint8_t *buf = bufP;
const uint8_t *start = buf;
const uint8_t *end = start + lenP;
if (!videoHandlerM)
return false;
// skip PES header
if (!PesLongEnough(lenP))
return false;
buf += PesPayloadOffset(buf);
start = buf;
reset();
for (;;) {
int consumed = 0;
buf = nextStartCode(buf, end);
if (buf >= end)
break;
switch ((buf[3] >> 1) & 0x3F) {
case NAL_AUD:
if (!aud_found) {
debug2("%s Found NAL AUD at offset %d/%d", __PRETTY_FUNCTION__, int(buf - start), lenP);
aud_found = true;
}
break;
case NAL_SPS:
if (!sps_found) {
debug2("%s Found NAL SPS at offset %d/%d", __PRETTY_FUNCTION__, int(buf - start), lenP);
int nal_len = nalUnescape(nal_data, buf + 5, int(end - buf - 5));
consumed = parseSPS(nal_data, nal_len);
if (consumed > 0)
sps_found = true;
}
break;
case NAL_SEI:
if (!sei_found) {
debug2("%s Found NAL SEI at offset %d/%d", __PRETTY_FUNCTION__, int(buf - start), lenP);
int nal_len = nalUnescape(nal_data, buf + 5, int(end - buf - 5));
consumed = parseSEI(nal_data, nal_len);
if (consumed > 0)
sei_found = true;
}
break;
default:
break;
}
if (aud_found && sps_found && sei_found)
break;
buf += consumed + 4;
}
if (aud_found) {
videoHandlerM->SetVideoCodec(VIDEO_CODEC_H265);
if (sps_found) {
debug2("%s width=%d height=%d, aspect=%d format=%d bitrate=%.0f", __PRETTY_FUNCTION__, widthM, heightM, aspectRatioM, formatM, bitRateM);
videoHandlerM->SetVideoSize(widthM, heightM);
videoHandlerM->SetVideoFormat(formatM);
videoHandlerM->SetVideoAspectRatio(aspectRatioM);
videoHandlerM->SetVideoBitrate(bitRateM);
}
if (sps_found || sei_found) {
debug2("%s scan=%d framerate=%.2f", __PRETTY_FUNCTION__, scanM, frameRateM);
videoHandlerM->SetVideoScan(scanM);
videoHandlerM->SetVideoFramerate(frameRateM);
}
}
return sps_found;
}
void cFemonH265::reset()
{
frameFieldInfoPresentFlagM = false;
}
const uint8_t *cFemonH265::nextStartCode(const uint8_t *startP, const uint8_t *endP)
{
for (endP -= 3; startP < endP; ++startP) {
if ((startP[0] == 0x00) && (startP[1] == 0x00) && (startP[2] == 0x01))
return startP;
}
return (endP + 3);
}
int cFemonH265::nalUnescape(uint8_t *dstP, const uint8_t *srcP, int lenP)
{
int s = 0, d = 0;
while (s < lenP - 3) {
if (!srcP[s] && !srcP[s + 1] && srcP[s + 2] == 3) {
dstP[d++] = srcP[s++];
dstP[d++] = srcP[s++];
s++; // skip emulation_prevention_three_byte
}
else
dstP[d++] = srcP[s++];
}
while (s < lenP)
dstP[d++] = srcP[s++];
return d;
}
int cFemonH265::parseSPS(const uint8_t *bufP, int lenP)
{
cFemonBitStream bs(bufP, lenP);
uint32_t width = widthM;
uint32_t height = heightM;
eVideoFormat format = formatM;
eVideoAspectRatio aspect_ratio = aspectRatioM;
eVideoScan scan = scanM;
double frame_rate = frameRateM;
double bit_rate = bitRateM;
bool frame_field_info_present_flag = frameFieldInfoPresentFlagM;
const char *profile_name = NULL;
bool general_tier_flag, conformance_window_flag, sps_sub_layer_ordering_info_present_flag, profilePresentFlag = true;
bool general_max_12bit_constraint_flag = false, general_max_10bit_constraint_flag = false, general_max_8bit_constraint_flag = false;
bool general_max_422chroma_constraint_flag = false, general_max_420chroma_constraint_flag = false, general_max_monochrome_constraint_flag = false;
bool general_intra_constraint_flag = false, general_one_picture_only_constraint_flag = false, general_lower_bit_rate_constraint_flag = false;
bool general_progressive_source_flag, general_interlaced_source_flag, general_profile_compatibility_flag[32];
uint32_t chroma_format_idc, log2_max_pic_order_cnt_lsb_minus4, num_short_term_ref_pic_sets, num_long_term_ref_pics_sps;
uint8_t sps_max_sub_layers_minus1, sub_layer_profile_present_flag[8], sub_layer_level_present_flag[8], general_profile_idc, general_level_idc;
bs.SkipBits(4); // sps_video_parameter_set_id
sps_max_sub_layers_minus1 = bs.GetBits(3); // sps_max_sub_layers_minus1
bs.SkipBit(); // sps_temporal_id_nesting_flag
// start of profile_tier_level(1, sps_max_sub_layers_minus1)
if (profilePresentFlag) {
bs.SkipBits(2); // general_profile_space
general_tier_flag = bs.GetBit(); // general_tier_flag
general_profile_idc = bs.GetBits(5); // general_profile_idc
for (int i = 0; i < 32; ++i) {
general_profile_compatibility_flag[i] = bs.GetBit(); // general_profile_compatibility_flag[i]
}
general_progressive_source_flag = bs.GetBit(); // general_progressive_source_flag
general_interlaced_source_flag = bs.GetBit(); // general_interlaced_source_flag
if (general_progressive_source_flag && !general_interlaced_source_flag)
scan = VIDEO_SCAN_PROGRESSIVE;
else if (!general_progressive_source_flag && general_interlaced_source_flag)
scan = VIDEO_SCAN_INTERLACED;
else if (!general_progressive_source_flag && !general_interlaced_source_flag)
scan = VIDEO_SCAN_UNKNOWN;
else
scan = VIDEO_SCAN_INVALID;
debug2("%s general_progressive_source_flag=%d general_interlaced_source_flag=%d scan_type=%d", __PRETTY_FUNCTION__, general_progressive_source_flag, general_interlaced_source_flag, scan);
bs.SkipBit(); // general_non_packed_constraint_flag
bs.SkipBit(); // general_frame_only_constraint_flag
if (general_profile_idc == 4 || general_profile_compatibility_flag[4] ||
general_profile_idc == 5 || general_profile_compatibility_flag[5] ||
general_profile_idc == 6 || general_profile_compatibility_flag[6] ||
general_profile_idc == 7 || general_profile_compatibility_flag[7]) {
// the number of bits in this syntax structure is not affected by this condition
general_max_12bit_constraint_flag = bs.GetBit(); // general_max_12bit_constraint_flag
general_max_10bit_constraint_flag = bs.GetBit(); // general_max_10bit_constraint_flag
general_max_8bit_constraint_flag = bs.GetBit(); // general_max_8bit_constraint_flag
debug2("%s general_max_12bit_constraint_flag=%d general_max_10bit_constraint_flag=%d general_max_8bit_constraint_flag=%d", __PRETTY_FUNCTION__, general_max_12bit_constraint_flag, general_max_10bit_constraint_flag, general_max_8bit_constraint_flag);
general_max_422chroma_constraint_flag = bs.GetBit(); // general_max_422chroma_constraint_flag
general_max_420chroma_constraint_flag = bs.GetBit(); // general_max_420chroma_constraint_flag
general_max_monochrome_constraint_flag = bs.GetBit(); // general_max_monochrome_constraint_flag
debug2("%s general_max_422chroma_constraint_flag=%d general_max_420chroma_constraint_flag=%d general_max_monochrome_constraint_flag=%d", __PRETTY_FUNCTION__, general_max_422chroma_constraint_flag, general_max_420chroma_constraint_flag, general_max_monochrome_constraint_flag);
general_intra_constraint_flag = bs.GetBit(); // general_intra_constraint_flag
general_one_picture_only_constraint_flag = bs.GetBit(); // general_one_picture_only_constraint_flag
general_lower_bit_rate_constraint_flag = bs.GetBit(); // general_lower_bit_rate_constraint_flag
debug2("%s general_intra_constraint_flag=%d general_one_picture_only_constraint_flag=%d general_lower_bit_rate_constraint_flag=%d", __PRETTY_FUNCTION__, general_intra_constraint_flag, general_one_picture_only_constraint_flag, general_lower_bit_rate_constraint_flag);
bs.SkipBits(34); // general_reserved_zero_34bits
}
else
bs.SkipBits(43); // general_reserved_zero_43bits
// the number of bits in this syntax structure is not affected by this condition
bs.SkipBit(); // general_reserved_zero_bit
}
general_level_idc = bs.GetBits(8); // general_level_idc
debug2("%s general_profile_idc=%d general_tier_flag=%d general_level_idc=%d", __PRETTY_FUNCTION__, general_profile_idc, general_tier_flag, general_level_idc);
switch (general_profile_idc) {
default:
case 0:
profile_name = "None";
break;
case 1:
profile_name = "Main";
break;
case 2:
profile_name = "Main 10";
break;
case 3:
profile_name = "Main Still Picture";
break;
case 4:
profile_name = "Format Range Extensions";
break;
case 5:
profile_name = "Format Range Extensions High Throughput";
break;
}
if (general_profile_idc == 1 || general_profile_idc == 2)
switch (general_level_idc) {
case 30: // level 1
bit_rate = general_tier_flag ? 0 : 128000;
break;
case 60: // level 2
bit_rate = general_tier_flag ? 0 : 1500000;
break;
case 63: // level 2.1
bit_rate = general_tier_flag ? 0 : 3000000;
break;
case 90: // level 3
bit_rate = general_tier_flag ? 0 : 6000000;
break;
case 93: // level 3
bit_rate = general_tier_flag ? 0 : 10000000;
break;
case 120: // level 4
bit_rate = general_tier_flag ? 30000000 : 12000000;
break;
case 123: // level 4.1
bit_rate = general_tier_flag ? 50000000 : 20000000;
break;
case 150: // level 5
bit_rate = general_tier_flag ? 100000000 : 25000000;
break;
case 153: // level 5.1
bit_rate = general_tier_flag ? 160000000 : 40000000;
break;
case 156: // level 5.2
bit_rate = general_tier_flag ? 240000000 : 60000000;
break;
case 180: // level 6
bit_rate = general_tier_flag ? 240000000 : 60000000;
break;
case 183: // level 6.1
bit_rate = general_tier_flag ? 480000000 : 120000000;
break;
case 186: // level 6.2
bit_rate = general_tier_flag ? 800000000 : 240000000;
break;
default:
bit_rate = 0;
break;
}
else
bit_rate = 0;
debug2("%s profile=\"%s@L%.1f@%s\" bit_rate=%.f", __PRETTY_FUNCTION__, profile_name, (double)general_level_idc / 30, general_tier_flag ? "High" : "Main", bit_rate);
for (int i = 0; i < sps_max_sub_layers_minus1; ++i) {
sub_layer_profile_present_flag[i] = bs.GetBit(); // sub_layer_profile_present_flag[i]
sub_layer_level_present_flag[i] = bs.GetBit(); // sub_layer_level_present_flag[i]
}
if (sps_max_sub_layers_minus1 > 0) {
for (int i = sps_max_sub_layers_minus1; i < 8; ++i)
bs.SkipBits(2); // reserved_zero_2bits[i]
}
for (int i = 0; i < sps_max_sub_layers_minus1; ++i) {
if (sub_layer_profile_present_flag[i]) {
bs.SkipBits(2); // sub_layer_profile_space[i]
bs.SkipBit(); // sub_layer_tier_flag[i]
bs.SkipBits(5); // sub_layer_profile_idc[i]
bs.SkipBits(32); // sub_layer_profile_compatibility_flag[i][0-31]
bs.SkipBit(); // sub_layer_progressive_source_flag[i]
bs.SkipBit(); // sub_layer_interlaced_source_flag[i]
bs.SkipBit(); // sub_layer_non_packed_constraint_flag[i]
bs.SkipBit(); // sub_layer_frame_only_constraint_flag[i]
// the number of bits in this syntax structure is not affected by this condition
bs.SkipBits(43); // sub_layer_reserved_zero_43bits[i]
// the number of bits in this syntax structure is not affected by this condition
bs.SkipBit(); // sub_layer_reserved_zero_bit[i]
}
if (sub_layer_level_present_flag[i])
bs.SkipBits(8); // sub_layer_level_idc[i]
}
// end of profile_tier_level
bs.SkipUeGolomb(); // sps_seq_parameter_set_id
chroma_format_idc = bs.GetUeGolomb(); // chroma_format_idc
if (chroma_format_idc == 3)
bs.SkipBit(); // separate_colour_plane_flag
width = bs.GetUeGolomb(); // pic_width_in_luma_samples
height = bs.GetUeGolomb(); // pic_height_in_luma_samples
conformance_window_flag = bs.GetBit(); // conformance_window_flag
if (conformance_window_flag) {
bs.SkipUeGolomb(); // conf_win_left_offset
bs.SkipUeGolomb(); // conf_win_right_offset
bs.SkipUeGolomb(); // conf_win_top_offset
bs.SkipUeGolomb(); // conf_win_bottom_offset
}
bs.SkipUeGolomb(); // bit_depth_luma_minus8
bs.SkipUeGolomb(); // bit_depth_chroma_minus8
log2_max_pic_order_cnt_lsb_minus4 = bs.GetUeGolomb(); // log2_max_pic_order_cnt_lsb_minus4
sps_sub_layer_ordering_info_present_flag = bs.GetBit(); // sps_sub_layer_ordering_info_present_flag
for (int i = (sps_sub_layer_ordering_info_present_flag ? 0 : sps_max_sub_layers_minus1); i <= sps_max_sub_layers_minus1; ++i) {
bs.SkipUeGolomb(); // sps_max_dec_pic_buffering_minus1[i]
bs.SkipUeGolomb(); // sps_max_num_reorder_pics[i]
bs.SkipUeGolomb(); // sps_max_latency_increase_plus1[i]
}
bs.SkipUeGolomb(); // log2_min_luma_coding_block_size_minus3
bs.SkipUeGolomb(); // log2_diff_max_min_luma_coding_block_size
bs.SkipUeGolomb(); // log2_min_luma_transform_block_size_minus2
bs.SkipUeGolomb(); // log2_diff_max_min_luma_transform_block_size
bs.SkipUeGolomb(); // max_transform_hierarchy_depth_inter
bs.SkipUeGolomb(); // max_transform_hierarchy_depth_intra
if (bs.GetBit()) { // scaling_list_enabled_flag
if (bs.GetBit()) { // sps_scaling_list_data_present_flag
// start of scaling_list_data()
for (int sizeId = 0; sizeId < 4; ++sizeId) {
for (int matrixId = 0; matrixId < 6; matrixId += (sizeId == 3) ? 3 : 1) {
if (!bs.GetBit()) // scaling_list_pred_mode_flag[sizeId][matrixId]
bs.SkipUeGolomb(); // scaling_list_pred_matrix_id_delta[sizeId][matrixId]
else {
int coefNum = min(64, (1 << (4 + (sizeId << 1))));
if (sizeId > 1)
bs.SkipSeGolomb(); // scaling_list_dc_coef_minus8[sizeId−2][matrixId]
for (int i = 0; i < coefNum; ++i)
bs.SkipSeGolomb(); // scaling_list_delta_coef
}
}
}
// end of scaling_list_data()
}
}
bs.SkipBit(); // amp_enabled_flag
bs.SkipBit(); // sample_adaptive_offset_enabled_flag
if (bs.GetBit()) { // pcm_enabled_flag
bs.SkipBits(4); // pcm_sample_bit_depth_luma_minus1
bs.SkipBits(4); // pcm_sample_bit_depth_chroma_minus1
bs.SkipUeGolomb(); // log2_min_pcm_luma_coding_block_size_minus3
bs.SkipUeGolomb(); // log2_diff_max_min_pcm_luma_coding_block_size
bs.SkipBit(); // pcm_loop_filter_disabled_flag
}
num_short_term_ref_pic_sets = bs.GetUeGolomb(); // num_short_term_ref_pic_sets
uint32_t NumDeltaPocs[num_short_term_ref_pic_sets];
for (uint32_t stRpsIdx = 0; stRpsIdx < num_short_term_ref_pic_sets; ++stRpsIdx) {
// start of st_ref_pic_set(stRpsIdx)
bool inter_ref_pic_set_prediction_flag = false;
if (stRpsIdx != 0)
inter_ref_pic_set_prediction_flag = bs.GetBit(); // inter_ref_pic_set_prediction_flag
if (inter_ref_pic_set_prediction_flag) {
uint32_t RefRpsIdx, delta_idx_minus1 = 0;
if (stRpsIdx == num_short_term_ref_pic_sets)
delta_idx_minus1 = bs.GetUeGolomb(); // delta_idx_minus1
bs.SkipBit(); // delta_rps_sign
bs.SkipUeGolomb(); // abs_delta_rps_minus1
RefRpsIdx = stRpsIdx - (delta_idx_minus1 + 1);
NumDeltaPocs[stRpsIdx] = 0;
for (uint32_t j = 0; j <= NumDeltaPocs[RefRpsIdx]; ++j) {
if (!bs.GetBit()) { // used_by_curr_pic_flag[j]
if (bs.GetBit()) // use_delta_flag[j]
NumDeltaPocs[stRpsIdx]++;
}
else
NumDeltaPocs[stRpsIdx]++;
}
}
else {
uint32_t num_negative_pics = bs.GetUeGolomb(); // num_negative_pics
uint32_t num_positive_pics = bs.GetUeGolomb(); // num_positive_pics
for (uint32_t j = 0; j < num_negative_pics; ++j) {
bs.SkipUeGolomb(); // delta_poc_s0_minus1[i]
bs.SkipBit(); // used_by_curr_pic_s0_flag[i]
}
for (uint32_t j = 0; j < num_positive_pics; ++j) {
bs.SkipUeGolomb(); // delta_poc_s1_minus1[i]
bs.SkipBit(); // delta_poc_s1_minus1[i]
}
NumDeltaPocs[stRpsIdx] = num_negative_pics + num_positive_pics;
}
// end of st_ref_pic_set(stRpsIdx)
}
if (bs.GetBit()) { // long_term_ref_pics_present_flag
num_long_term_ref_pics_sps = bs.GetUeGolomb(); // num_long_term_ref_pics_sps
for (uint32_t i = 0; i < num_long_term_ref_pics_sps; ++i) {
bs.SkipBits(log2_max_pic_order_cnt_lsb_minus4 + 4); // lt_ref_pic_poc_lsb_sps[i]
bs.SkipBit(); // used_by_curr_pic_lt_sps_flag[i]
}
}
bs.SkipBit(); // sps_temporal_mvp_enabled_flag
bs.SkipBit(); // strong_intra_smoothing_enabled_flag
if (bs.GetBit()) { // vui_parameters_present_flag
// start of vui_parameters()
if (bs.GetBit()) { // aspect_ratio_info_present_flag
uint32_t sar_width = 0, sar_height = 0;
uint8_t aspect_ratio_idc = bs.GetBits(8); // aspect_ratio_idc
debug2("%s aspect_ratio_idc=%d", __PRETTY_FUNCTION__, aspect_ratio_idc);
if (aspect_ratio_idc == 255) { // EXTENDED_SAR
sar_width = bs.GetBits(16); // sar_width
sar_height = bs.GetBits(16); // sar_height
}
else if (aspect_ratio_idc < ELEMENTS(sarS)) {
sar_width = sarS[aspect_ratio_idc].w;
sar_height = sarS[aspect_ratio_idc].h;
}
if (sar_width && sar_height) {
int index = -1, ratio = int(100.0L * sar_width * width / sar_height / height);
for (unsigned int i = 0; i < ELEMENTS(darS); ++i) {
if (darS[i].ratio == ratio) {
index = i;
break;
}
}
if (index < 0) {
if (aspect_ratio_idc == 255)
aspect_ratio = VIDEO_ASPECT_RATIO_EXTENDED;
else
aspect_ratio = VIDEO_ASPECT_RATIO_INVALID;
}
else
aspect_ratio = darS[index].dar;
debug2("%s sar_width=%d sar_height=%d aspect_ratio=%d", __PRETTY_FUNCTION__, sar_width, sar_height, aspect_ratio);
}
}
if (bs.GetBit()) // overscan_info_present_flag
bs.SkipBit(); // overscan_appropriate_flag
if (bs.GetBit()) { // video_signal_type_present_flag
uint32_t video_format = bs.GetBits(3); // video_format
if (video_format < ELEMENTS(videoFormatS)) {
format = videoFormatS[video_format];
debug2("%s video_format=%d format=%d", __PRETTY_FUNCTION__, video_format, format);
}
bs.SkipBit(); // video_full_range_flag
if (bs.GetBit()) { // colour_description_present_flag
bs.SkipBits(8); // colour_primaries
bs.SkipBits(8); // transfer_characteristics
bs.SkipBits(8); // matrix_coeffs
}
}
if (bs.GetBit()) { // chroma_loc_info_present_flag
bs.SkipUeGolomb(); // chroma_sample_loc_type_top_field
bs.SkipUeGolomb(); // chroma_sample_loc_type_bottom_field
}
bs.SkipBit(); // neutral_chroma_indication_flag
bs.SkipBit(); // field_seq_flag
frame_field_info_present_flag = bs.GetBit(); // frame_field_info_present_flag
debug2("%s frame_field_info_present_flag=%d", __PRETTY_FUNCTION__, frame_field_info_present_flag);
if (bs.GetBit()) { // default_display_window_flag
bs.SkipUeGolomb(); // def_disp_win_left_offset
bs.SkipUeGolomb(); // def_disp_win_right_offset
bs.SkipUeGolomb(); // def_disp_win_top_offset
bs.SkipUeGolomb(); // def_disp_win_bottom_offset
}
if (bs.GetBit()) { // vui_timing_info_present_flag
uint32_t vui_num_units_in_tick = bs.GetBits(32); // vui_num_units_in_tick
uint32_t vui_time_scale = bs.GetBits(32); // vui_time_scale
if (vui_num_units_in_tick > 0) {
frame_rate = (double)vui_time_scale / vui_num_units_in_tick;
debug2("%s frame_rate = vui_time_scale(%d) / vui_num_units_in_tick(%d) = %.f", __PRETTY_FUNCTION__, vui_time_scale, vui_num_units_in_tick, frame_rate);
}
if (bs.GetBit()) // vui_poc_proportional_to_timing_flag
bs.SkipUeGolomb(); // vui_num_ticks_poc_diff_one_minus1
if (bs.GetBit()) { // vui_hrd_parameters_present_flag
// start of hrd_parameters(1, sps_max_sub_layers_minus1)
uint32_t bit_rate_scale = 0;
bool commonInfPresentFlag = true, nal_hrd_parameters_present_flag = false, vcl_hrd_parameters_present_flag = false, sub_pic_hrd_params_present_flag = false;
if (commonInfPresentFlag) {
nal_hrd_parameters_present_flag = bs.GetBit(); // nal_hrd_parameters_present_flag
vcl_hrd_parameters_present_flag = bs.GetBit(); // vcl_hrd_parameters_present_flag
if (nal_hrd_parameters_present_flag || vcl_hrd_parameters_present_flag) {
sub_pic_hrd_params_present_flag = bs.GetBit(); // sub_pic_hrd_params_present_flag
if (sub_pic_hrd_params_present_flag) {
bs.SkipBits(8); // tick_divisor_minus2
bs.SkipBits(5); // du_cpb_removal_delay_increment_length_minus1
bs.SkipBit(); // sub_pic_cpb_params_in_pic_timing_sei_flag
bs.SkipBits(5); // dpb_output_delay_du_length_minus1
}
bit_rate_scale = bs.GetBits(4); // bit_rate_scale
bs.SkipBits(4); // cpb_size_scale
if (sub_pic_hrd_params_present_flag)
bs.SkipBits(4); // cpb_size_du_scale
bs.SkipBits(5); // initial_cpb_removal_delay_length_minus1
bs.SkipBits(5); // au_cpb_removal_delay_length_minus1
bs.SkipBits(5); // dpb_output_delay_length_minus1
}
}
for (uint32_t i = 0; i <= sps_max_sub_layers_minus1; ++i) {
bool fixed_pic_rate_within_cvs_flag = false, low_delay_hrd_flag = false;
uint32_t cpb_cnt_minus1 = 0;
if (!bs.GetBit()) // fixed_pic_rate_general_flag[i]
fixed_pic_rate_within_cvs_flag = bs.GetBit(); // fixed_pic_rate_within_cvs_flag[i]
if (fixed_pic_rate_within_cvs_flag)
bs.SkipUeGolomb(); // elemental_duration_in_tc_minus1[i]
else
low_delay_hrd_flag = bs.GetBit(); // low_delay_hrd_flag[i]
if (!low_delay_hrd_flag)
cpb_cnt_minus1 = bs.GetUeGolomb(); // cpb_cnt_minus1[i]
if (nal_hrd_parameters_present_flag) {
// start of sub_layer_hrd_parameters(i)
for (uint32_t i = 0; i <= cpb_cnt_minus1; ++i) {
uint32_t bit_rate_value_minus1;
bit_rate_value_minus1 = bs.GetUeGolomb(); // bit_rate_value_minus1[i]
bs.SkipUeGolomb(); // cpb_size_value_minus1[i]
if (sub_pic_hrd_params_present_flag) {
bs.SkipUeGolomb(); // cpb_size_du_value_minus1[i]
bs.SkipUeGolomb(); // bit_rate_du_value_minus1[i]
}
else {
double bitrate = (double)((bit_rate_value_minus1 + 1) * pow(2.0, 6 + bit_rate_scale));
debug2("%s bit_rate_value_minus1(%u) + 1 * 2 ^ (6 + bit_rate_scale(%u)) = %.f", __PRETTY_FUNCTION__, bit_rate_value_minus1, bit_rate_scale, bitrate);
}
bs.SkipBit(); // cbr_flag[i]
}
// end of sub_layer_hrd_parameters(i)
}
if (vcl_hrd_parameters_present_flag) {
// start of sub_layer_hrd_parameters(i)
for (uint32_t i = 0; i <= cpb_cnt_minus1; ++i) {
bs.SkipUeGolomb(); // bit_rate_value_minus1[i]
bs.SkipUeGolomb(); // cpb_size_value_minus1[i]
if (sub_pic_hrd_params_present_flag) {
bs.SkipUeGolomb(); // cpb_size_du_value_minus1[i]
bs.SkipUeGolomb(); // bit_rate_du_value_minus1[i]
}
bs.SkipBit(); // cbr_flag[i]
}
// end of sub_layer_hrd_parameters(i)
}
}
// end of hrd_parameters(1, sps_max_sub_layers_minus1)
}
}
if (bs.GetBit()) { // bitstream_restriction_flag
bs.SkipBit(); // tiles_fixed_structure_flag
bs.SkipBit(); // motion_vectors_over_pic_boundaries_flag
bs.SkipBit(); // restricted_ref_pic_lists_flag
bs.SkipUeGolomb(); // min_spatial_segmentation_idc
bs.SkipUeGolomb(); // max_bytes_per_pic_denom
bs.SkipUeGolomb(); // max_bits_per_min_cu_denom
bs.SkipUeGolomb(); // log2_max_mv_length_horizontal
bs.SkipUeGolomb(); // log2_max_mv_length_vertical
}
// end of vui_parameters()
}
if (bs.GetBit()) { // sps_extension_present_flag
bs.SkipBit(); // sps_range_extension_flag
bs.SkipBit(); // sps_multilayer_extension_flag
bs.SkipBit(); // sps_3d_extension_flag
bs.SkipBits(5); // sps_extension_5bits
}
widthM = width;
heightM = height;
formatM = format;
aspectRatioM = aspect_ratio;
scanM = scan;
frameRateM = frame_rate;
bitRateM = bit_rate;
frameFieldInfoPresentFlagM = frame_field_info_present_flag;
return (bs.Index() / 8);
}
int cFemonH265::parseSEI(const uint8_t *bufP, int lenP)
{
cFemonBitStream bs(bufP, lenP);
eVideoScan scan = scanM;
while ((bs.Index() * 8 + 16) < lenP) { // sei_message
int len, lastByte, payloadSize = 0, payloadType = 0;
do {
lastByte = bs.GetBits(8) & 0xFF;
payloadType += lastByte;
} while (lastByte == 0xFF); // last_payload_type_byte
do {
lastByte = bs.GetBits(8) & 0xFF;
payloadSize += lastByte;
} while (lastByte == 0xFF); // last_payload_size_byte
switch (payloadType) { // sei_payload
case 1: // pic_timing
len = payloadSize * 8;
if (frameFieldInfoPresentFlagM) {
uint8_t pic_struct = bs.GetBits(4); // pic_struct
switch (pic_struct) {
case 0: // frame
case 7: // frame doubling
case 8: // frame tripling
scan = VIDEO_SCAN_PROGRESSIVE;
break;
case 1: // top
case 2: // bottom
case 3: // top bottom
case 4: // bottom top
case 5: // top bottom top
case 6: // bottom top bottom
case 9: // top paired with previous bottom
case 10: // bottom paired with previous top
case 11: // top paired with next bottom
case 12: // bottom paired with next top
scan = VIDEO_SCAN_INTERLACED;
break;
default:
scan = VIDEO_SCAN_RESERVED;
break;
}
debug2("%s pic_struct=%d scan_type=%d", __PRETTY_FUNCTION__, pic_struct, scan);
bs.SkipBits(2); // source_scan_type
bs.SkipBit(); // duplicate_flag
len -= 7;
}
bs.SkipBits(len);
break;
default:
bs.SkipBits(payloadSize * 8);
break;
}
// force byte align
bs.ByteAlign();
}
scanM = scan;
return (bs.Index() / 8);
}
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