org.mp4parser.muxer.tracks.h264.SEIMessage Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of muxer Show documentation
Show all versions of muxer Show documentation
This package has a focus on file operation. It can read A/V data from Random Access Datasources
package org.mp4parser.muxer.tracks.h264;
import org.mp4parser.muxer.tracks.h264.parsing.model.SeqParameterSet;
import org.mp4parser.muxer.tracks.h264.parsing.read.CAVLCReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
/**
* Created by sannies on 15.08.2015.
*/
public class SEIMessage {
int payloadType = 0;
int payloadSize = 0;
boolean removal_delay_flag;
int cpb_removal_delay;
int dpb_removal_delay;
boolean clock_timestamp_flag;
int pic_struct;
int ct_type;
int nuit_field_based_flag;
int counting_type;
int full_timestamp_flag;
int discontinuity_flag;
int cnt_dropped_flag;
int n_frames;
int seconds_value;
int minutes_value;
int hours_value;
int time_offset_length;
int time_offset;
SeqParameterSet sps;
public SEIMessage(InputStream is, SeqParameterSet sps) throws IOException {
this.sps = sps;
is.read();
int datasize = is.available();
int read = 0;
while (read < datasize) {
payloadType = 0;
payloadSize = 0;
int last_payload_type_bytes = is.read();
read++;
while (last_payload_type_bytes == 0xff) {
payloadType += last_payload_type_bytes;
last_payload_type_bytes = is.read();
read++;
}
payloadType += last_payload_type_bytes;
int last_payload_size_bytes = is.read();
read++;
while (last_payload_size_bytes == 0xff) {
payloadSize += last_payload_size_bytes;
last_payload_size_bytes = is.read();
read++;
}
payloadSize += last_payload_size_bytes;
if (datasize - read >= payloadSize) {
if (payloadType == 1) { // pic_timing is what we are interested in!
if (sps.vuiParams != null && (sps.vuiParams.nalHRDParams != null || sps.vuiParams.vclHRDParams != null || sps.vuiParams.pic_struct_present_flag)) {
byte[] data = new byte[payloadSize];
is.read(data);
read += payloadSize;
CAVLCReader reader = new CAVLCReader(new ByteArrayInputStream(data));
if (sps.vuiParams.nalHRDParams != null || sps.vuiParams.vclHRDParams != null) {
removal_delay_flag = true;
cpb_removal_delay = reader.readU(sps.vuiParams.nalHRDParams.cpb_removal_delay_length_minus1 + 1, "SEI: cpb_removal_delay");
dpb_removal_delay = reader.readU(sps.vuiParams.nalHRDParams.dpb_output_delay_length_minus1 + 1, "SEI: dpb_removal_delay");
} else {
removal_delay_flag = false;
}
if (sps.vuiParams.pic_struct_present_flag) {
pic_struct = reader.readU(4, "SEI: pic_struct");
int numClockTS;
switch (pic_struct) {
case 0:
case 1:
case 2:
default:
numClockTS = 1;
break;
case 3:
case 4:
case 7:
numClockTS = 2;
break;
case 5:
case 6:
case 8:
numClockTS = 3;
break;
}
for (int i = 0; i < numClockTS; i++) {
clock_timestamp_flag = reader.readBool("pic_timing SEI: clock_timestamp_flag[" + i + "]");
if (clock_timestamp_flag) {
ct_type = reader.readU(2, "pic_timing SEI: ct_type");
nuit_field_based_flag = reader.readU(1, "pic_timing SEI: nuit_field_based_flag");
counting_type = reader.readU(5, "pic_timing SEI: counting_type");
full_timestamp_flag = reader.readU(1, "pic_timing SEI: full_timestamp_flag");
discontinuity_flag = reader.readU(1, "pic_timing SEI: discontinuity_flag");
cnt_dropped_flag = reader.readU(1, "pic_timing SEI: cnt_dropped_flag");
n_frames = reader.readU(8, "pic_timing SEI: n_frames");
if (full_timestamp_flag == 1) {
seconds_value = reader.readU(6, "pic_timing SEI: seconds_value");
minutes_value = reader.readU(6, "pic_timing SEI: minutes_value");
hours_value = reader.readU(5, "pic_timing SEI: hours_value");
} else {
if (reader.readBool("pic_timing SEI: seconds_flag")) {
seconds_value = reader.readU(6, "pic_timing SEI: seconds_value");
if (reader.readBool("pic_timing SEI: minutes_flag")) {
minutes_value = reader.readU(6, "pic_timing SEI: minutes_value");
if (reader.readBool("pic_timing SEI: hours_flag")) {
hours_value = reader.readU(5, "pic_timing SEI: hours_value");
}
}
}
}
if (true) {
if (sps.vuiParams.nalHRDParams != null) {
time_offset_length = sps.vuiParams.nalHRDParams.time_offset_length;
} else if (sps.vuiParams.vclHRDParams != null) {
time_offset_length = sps.vuiParams.vclHRDParams.time_offset_length;
} else {
time_offset_length = 24;
}
time_offset = reader.readU(24, "pic_timing SEI: time_offset");
}
}
}
}
} else {
for (int i = 0; i < payloadSize; i++) {
is.read();
read++;
}
}
} else {
for (int i = 0; i < payloadSize; i++) {
is.read();
read++;
}
}
} else {
read = datasize;
}
}
}
@Override
public String toString() {
String out = "SEIMessage{" +
"payloadType=" + payloadType +
", payloadSize=" + payloadSize;
if (payloadType == 1) {
if (sps.vuiParams.nalHRDParams != null || sps.vuiParams.vclHRDParams != null) {
out += ", cpb_removal_delay=" + cpb_removal_delay +
", dpb_removal_delay=" + dpb_removal_delay;
}
if (sps.vuiParams.pic_struct_present_flag) {
out += ", pic_struct=" + pic_struct;
if (clock_timestamp_flag) {
out += ", ct_type=" + ct_type +
", nuit_field_based_flag=" + nuit_field_based_flag +
", counting_type=" + counting_type +
", full_timestamp_flag=" + full_timestamp_flag +
", discontinuity_flag=" + discontinuity_flag +
", cnt_dropped_flag=" + cnt_dropped_flag +
", n_frames=" + n_frames +
", seconds_value=" + seconds_value +
", minutes_value=" + minutes_value +
", hours_value=" + hours_value +
", time_offset_length=" + time_offset_length +
", time_offset=" + time_offset;
}
}
}
out += '}';
return out;
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy