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com.googlecode.mp4parser.authoring.tracks.h264.H264TrackImpl Maven / Gradle / Ivy
package com.googlecode.mp4parser.authoring.tracks.h264;
import com.coremedia.iso.boxes.CompositionTimeToSample;
import com.coremedia.iso.boxes.SampleDependencyTypeBox;
import com.coremedia.iso.boxes.SampleDescriptionBox;
import com.coremedia.iso.boxes.sampleentry.VisualSampleEntry;
import com.googlecode.mp4parser.DataSource;
import com.googlecode.mp4parser.authoring.Sample;
import com.googlecode.mp4parser.authoring.tracks.AbstractH26XTrack;
import com.googlecode.mp4parser.h264.model.PictureParameterSet;
import com.googlecode.mp4parser.h264.model.SeqParameterSet;
import com.googlecode.mp4parser.h264.read.CAVLCReader;
import com.googlecode.mp4parser.util.Mp4Arrays;
import com.googlecode.mp4parser.util.RangeStartMap;
import com.mp4parser.iso14496.part15.AvcConfigurationBox;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.util.*;
import java.util.logging.Logger;
/**
* The H264TrackImpl creates a Track from an H.264
* Annex B file.
*/
public class H264TrackImpl extends AbstractH26XTrack {
private static final Logger LOG = Logger.getLogger(H264TrackImpl.class.getName());
Map spsIdToSpsBytes = new HashMap();
Map spsIdToSps = new HashMap();
Map ppsIdToPpsBytes = new HashMap();
Map ppsIdToPps = new HashMap();
SampleDescriptionBox sampleDescriptionBox;
SeqParameterSet firstSeqParameterSet = null;
PictureParameterSet firstPictureParameterSet = null;
SeqParameterSet currentSeqParameterSet = null;
PictureParameterSet currentPictureParameterSet = null;
RangeStartMap seqParameterRangeMap = new RangeStartMap();
RangeStartMap pictureParameterRangeMap = new RangeStartMap();
int frameNrInGop = 0;
int[] pictureOrderCounts = new int[0];
int prevPicOrderCntLsb = 0;
int prevPicOrderCntMsb = 0;
private List samples;
private int width;
private int height;
private long timescale;
private int frametick;
private SEIMessage seiMessage;
private boolean determineFrameRate = true;
private String lang = "eng";
/**
* Creates a new Track object from a raw H264 source (DataSource dataSource1).
* Whenever the timescale and frametick are set to negative value (e.g. -1) the H264TrackImpl
* tries to detect the frame rate.
* Typically values for timescale and frametick are:
*
* 23.976 FPS: timescale = 24000; frametick = 1001
* 25 FPS: timescale = 25; frametick = 1
* 29.97 FPS: timescale = 30000; frametick = 1001
* 30 FPS: timescale = 30; frametick = 1
*
*
* @param dataSource the source file of the H264 samples
* @param lang language of the movie (in doubt: use "eng")
* @param timescale number of time units (ticks) in one second
* @param frametick number of time units (ticks) that pass while showing exactly one frame
* @throws IOException in case of problems whiel reading from the DataSource
*/
public H264TrackImpl(DataSource dataSource, String lang, long timescale, int frametick) throws IOException {
super(dataSource);
this.lang = lang;
this.timescale = timescale; //e.g. 23976
this.frametick = frametick;
if ((timescale > 0) && (frametick > 0)) {
this.determineFrameRate = false;
}
parse(new LookAhead(dataSource));
}
public H264TrackImpl(DataSource dataSource, String lang) throws IOException {
this(dataSource, lang, -1, -1);
}
public H264TrackImpl(DataSource dataSource) throws IOException {
this(dataSource, "eng");
}
public static H264NalUnitHeader getNalUnitHeader(ByteBuffer nal) {
H264NalUnitHeader nalUnitHeader = new H264NalUnitHeader();
int type = nal.get(0);
nalUnitHeader.nal_ref_idc = (type >> 5) & 3;
nalUnitHeader.nal_unit_type = type & 0x1f;
return nalUnitHeader;
}
private void parse(LookAhead la) throws IOException {
samples = new ArrayList();
if (!readSamples(la)) {
throw new IOException();
}
if (!readVariables()) {
throw new IOException();
}
sampleDescriptionBox = new SampleDescriptionBox();
VisualSampleEntry visualSampleEntry = new VisualSampleEntry("avc1");
visualSampleEntry.setDataReferenceIndex(1);
visualSampleEntry.setDepth(24);
visualSampleEntry.setFrameCount(1);
visualSampleEntry.setHorizresolution(72);
visualSampleEntry.setVertresolution(72);
visualSampleEntry.setWidth(width);
visualSampleEntry.setHeight(height);
visualSampleEntry.setCompressorname("AVC Coding");
AvcConfigurationBox avcConfigurationBox = new AvcConfigurationBox();
avcConfigurationBox.setSequenceParameterSets(new ArrayList(spsIdToSpsBytes.values()));
avcConfigurationBox.setPictureParameterSets(new ArrayList(ppsIdToPpsBytes.values()));
avcConfigurationBox.setAvcLevelIndication(firstSeqParameterSet.level_idc);
avcConfigurationBox.setAvcProfileIndication(firstSeqParameterSet.profile_idc);
avcConfigurationBox.setBitDepthLumaMinus8(firstSeqParameterSet.bit_depth_luma_minus8);
avcConfigurationBox.setBitDepthChromaMinus8(firstSeqParameterSet.bit_depth_chroma_minus8);
avcConfigurationBox.setChromaFormat(firstSeqParameterSet.chroma_format_idc.getId());
avcConfigurationBox.setConfigurationVersion(1);
avcConfigurationBox.setLengthSizeMinusOne(3);
avcConfigurationBox.setProfileCompatibility(
(firstSeqParameterSet.constraint_set_0_flag ? 128 : 0) +
(firstSeqParameterSet.constraint_set_1_flag ? 64 : 0) +
(firstSeqParameterSet.constraint_set_2_flag ? 32 : 0) +
(firstSeqParameterSet.constraint_set_3_flag ? 16 : 0) +
(firstSeqParameterSet.constraint_set_4_flag ? 8 : 0) +
(int) (firstSeqParameterSet.reserved_zero_2bits & 0x3)
);
visualSampleEntry.addBox(avcConfigurationBox);
sampleDescriptionBox.addBox(visualSampleEntry);
trackMetaData.setCreationTime(new Date());
trackMetaData.setModificationTime(new Date());
trackMetaData.setLanguage(lang);
trackMetaData.setTimescale(timescale);
trackMetaData.setWidth(width);
trackMetaData.setHeight(height);
}
public SampleDescriptionBox getSampleDescriptionBox() {
return sampleDescriptionBox;
}
public String getHandler() {
return "vide";
}
public List getSamples() {
return samples;
}
private boolean readVariables() {
width = (firstSeqParameterSet.pic_width_in_mbs_minus1 + 1) * 16;
int mult = 2;
if (firstSeqParameterSet.frame_mbs_only_flag) {
mult = 1;
}
height = 16 * (firstSeqParameterSet.pic_height_in_map_units_minus1 + 1) * mult;
if (firstSeqParameterSet.frame_cropping_flag) {
int chromaArrayType = 0;
if (!firstSeqParameterSet.residual_color_transform_flag) {
chromaArrayType = firstSeqParameterSet.chroma_format_idc.getId();
}
int cropUnitX = 1;
int cropUnitY = mult;
if (chromaArrayType != 0) {
cropUnitX = firstSeqParameterSet.chroma_format_idc.getSubWidth();
cropUnitY = firstSeqParameterSet.chroma_format_idc.getSubHeight() * mult;
}
width -= cropUnitX * (firstSeqParameterSet.frame_crop_left_offset + firstSeqParameterSet.frame_crop_right_offset);
height -= cropUnitY * (firstSeqParameterSet.frame_crop_top_offset + firstSeqParameterSet.frame_crop_bottom_offset);
}
return true;
}
private boolean readSamples(LookAhead la) throws IOException {
List buffered = new ArrayList();
ByteBuffer nal;
class FirstVclNalDetector {
int frame_num;
int pic_parameter_set_id;
boolean field_pic_flag;
boolean bottom_field_flag;
int nal_ref_idc;
int pic_order_cnt_type;
int delta_pic_order_cnt_bottom;
int pic_order_cnt_lsb;
int delta_pic_order_cnt_0;
int delta_pic_order_cnt_1;
boolean idrPicFlag;
int idr_pic_id;
public FirstVclNalDetector(ByteBuffer nal, int nal_ref_idc, int nal_unit_type) {
InputStream bs = cleanBuffer(new ByteBufferBackedInputStream(nal));
SliceHeader sh = new SliceHeader(bs, spsIdToSps, ppsIdToPps, nal_unit_type == 5);
this.frame_num = sh.frame_num;
this.pic_parameter_set_id = sh.pic_parameter_set_id;
this.field_pic_flag = sh.field_pic_flag;
this.bottom_field_flag = sh.bottom_field_flag;
this.nal_ref_idc = nal_ref_idc;
this.pic_order_cnt_type = spsIdToSps.get(ppsIdToPps.get(sh.pic_parameter_set_id).seq_parameter_set_id).pic_order_cnt_type;
this.delta_pic_order_cnt_bottom = sh.delta_pic_order_cnt_bottom;
this.pic_order_cnt_lsb = sh.pic_order_cnt_lsb;
this.delta_pic_order_cnt_0 = sh.delta_pic_order_cnt_0;
this.delta_pic_order_cnt_1 = sh.delta_pic_order_cnt_1;
this.idr_pic_id = sh.idr_pic_id;
}
boolean isFirstInNew(FirstVclNalDetector nu) {
if (nu.frame_num != frame_num) {
return true;
}
if (nu.pic_parameter_set_id != pic_parameter_set_id) {
return true;
}
if (nu.field_pic_flag != field_pic_flag) {
return true;
}
if (nu.field_pic_flag) {
if (nu.bottom_field_flag != bottom_field_flag) {
return true;
}
}
if (nu.nal_ref_idc != nal_ref_idc) {
return true;
}
if (nu.pic_order_cnt_type == 0 && pic_order_cnt_type == 0) {
if (nu.pic_order_cnt_lsb != pic_order_cnt_lsb) {
return true;
}
if (nu.delta_pic_order_cnt_bottom != delta_pic_order_cnt_bottom) {
return true;
}
}
if (nu.pic_order_cnt_type == 1 && pic_order_cnt_type == 1) {
if (nu.delta_pic_order_cnt_0 != delta_pic_order_cnt_0) {
return true;
}
if (nu.delta_pic_order_cnt_1 != delta_pic_order_cnt_1) {
return true;
}
}
if (nu.idrPicFlag != idrPicFlag) {
return true;
}
if (nu.idrPicFlag && idrPicFlag) {
if (nu.idr_pic_id != idr_pic_id) {
return true;
}
}
return false;
}
}
FirstVclNalDetector fvnd = null;
nal_loop:
while ((nal = findNextNal(la)) != null) {
H264NalUnitHeader nalUnitHeader = getNalUnitHeader(nal);
switch (nalUnitHeader.nal_unit_type) {
case H264NalUnitTypes.CODED_SLICE_NON_IDR:
case H264NalUnitTypes.CODED_SLICE_DATA_PART_A:
case H264NalUnitTypes.CODED_SLICE_DATA_PART_B:
case H264NalUnitTypes.CODED_SLICE_DATA_PART_C:
case H264NalUnitTypes.CODED_SLICE_IDR:
FirstVclNalDetector current = new FirstVclNalDetector(nal,
nalUnitHeader.nal_ref_idc, nalUnitHeader.nal_unit_type);
if (fvnd != null && fvnd.isFirstInNew(current)) {
LOG.finer("Wrapping up cause of first vcl nal is found");
createSample(buffered);
}
fvnd = current;
//System.err.println("" + nalUnitHeader.nal_unit_type);
buffered.add((ByteBuffer) nal.rewind());
//log.finer("NAL Unit Type: " + nalUnitHeader.nal_unit_type + " " + fvnd.frame_num);
break;
case H264NalUnitTypes.SEI:
if (fvnd != null) {
LOG.finer("Wrapping up cause of SEI after vcl marks new sample");
createSample(buffered);
fvnd = null;
}
seiMessage = new SEIMessage(cleanBuffer(new ByteBufferBackedInputStream(nal)), currentSeqParameterSet);
//System.err.println("" + nalUnitHeader.nal_unit_type);
buffered.add(nal);
break;
case H264NalUnitTypes.AU_UNIT_DELIMITER:
if (fvnd != null) {
LOG.finer("Wrapping up cause of AU after vcl marks new sample");
createSample(buffered);
fvnd = null;
}
//System.err.println("" + nalUnitHeader.nal_unit_type);
buffered.add(nal);
break;
case H264NalUnitTypes.SEQ_PARAMETER_SET:
if (fvnd != null) {
LOG.finer("Wrapping up cause of SPS after vcl marks new sample");
createSample(buffered);
fvnd = null;
}
handleSPS((ByteBuffer) nal.rewind());
break;
case 8:
if (fvnd != null) {
LOG.finer("Wrapping up cause of PPS after vcl marks new sample");
createSample(buffered);
fvnd = null;
}
handlePPS((ByteBuffer) nal.rewind());
break;
case H264NalUnitTypes.END_OF_SEQUENCE:
case H264NalUnitTypes.END_OF_STREAM:
break nal_loop;
case H264NalUnitTypes.SEQ_PARAMETER_SET_EXT:
throw new RuntimeException("Sequence parameter set extension is not yet handled. Needs TLC.");
default:
// buffered.add(nal);
LOG.warning("Unknown NAL unit type: " + nalUnitHeader.nal_unit_type);
}
}
if (buffered.size() > 0) {
createSample(buffered);
}
calcCtts();
decodingTimes = new long[samples.size()];
Arrays.fill(decodingTimes, frametick);
return true;
}
public void calcCtts() {
int pTime = 0;
int lastPoc = -1;
for (int j = 0; j < pictureOrderCounts.length; j++) {
int minIndex = 0;
int minValue = Integer.MAX_VALUE;
for (int i = Math.max(0, j - 128); i < Math.min(pictureOrderCounts.length, j + 128); i++) {
if (pictureOrderCounts[i] > lastPoc && pictureOrderCounts[i] < minValue) {
minIndex = i;
minValue = pictureOrderCounts[i];
}
}
lastPoc = pictureOrderCounts[minIndex];
pictureOrderCounts[minIndex] = pTime++;
}
for (int i = 0; i < pictureOrderCounts.length; i++) {
ctts.add(new CompositionTimeToSample.Entry(1, pictureOrderCounts[i] - i));
}
pictureOrderCounts = new int[0];
}
private void createSample(List buffered) throws IOException {
SampleDependencyTypeBox.Entry sampleDependency = new SampleDependencyTypeBox.Entry(0);
boolean IdrPicFlag = false;
H264NalUnitHeader nu = null;
for (ByteBuffer nal : buffered) {
H264NalUnitHeader _nu = getNalUnitHeader(nal);
switch (_nu.nal_unit_type) {
case H264NalUnitTypes.CODED_SLICE_IDR:
IdrPicFlag = true;
case H264NalUnitTypes.CODED_SLICE_NON_IDR:
case H264NalUnitTypes.CODED_SLICE_DATA_PART_A:
case H264NalUnitTypes.CODED_SLICE_DATA_PART_B:
case H264NalUnitTypes.CODED_SLICE_DATA_PART_C:
nu = _nu;
}
}
if (nu == null) {
LOG.warning("Sample without Slice");
return;
}
if (IdrPicFlag) {
calcCtts();
}
// cleans the buffer we just added
InputStream bs = cleanBuffer(new ByteBufferBackedInputStream(buffered.get(buffered.size() - 1)));
SliceHeader sh = new SliceHeader(bs, spsIdToSps, ppsIdToPps, IdrPicFlag);
if (nu.nal_ref_idc== 0) {
sampleDependency.setSampleIsDependentOn(2);
} else {
sampleDependency.setSampleIsDependentOn(1);
}
if ((sh.slice_type == SliceHeader.SliceType.I) || (sh.slice_type == SliceHeader.SliceType.SI) ) {
sampleDependency.setSampleDependsOn(2);
} else {
sampleDependency.setSampleDependsOn(1);
}
Sample bb = createSampleObject(buffered);
// LOG.fine("Adding sample with size " + bb.capacity() + " and header " + sh);
buffered.clear();
if (seiMessage == null || seiMessage.n_frames == 0) {
frameNrInGop = 0;
}
int offset = 0;
if (sh.sps.pic_order_cnt_type == 0) {
int max_pic_order_count_lsb = (1 << (sh.sps.log2_max_pic_order_cnt_lsb_minus4 + 4));
// System.out.print(" pic_order_cnt_lsb " + pic_order_cnt_lsb + " " + max_pic_order_count);
int picOrderCountLsb = sh.pic_order_cnt_lsb;
int picOrderCntMsb = 0;
if ((picOrderCountLsb < prevPicOrderCntLsb) &&
((prevPicOrderCntLsb - picOrderCountLsb) >= (max_pic_order_count_lsb / 2))) {
picOrderCntMsb = prevPicOrderCntMsb + max_pic_order_count_lsb;
} else if ((picOrderCountLsb > prevPicOrderCntLsb) &&
((picOrderCountLsb - prevPicOrderCntLsb) > (max_pic_order_count_lsb / 2))) {
picOrderCntMsb = prevPicOrderCntMsb - max_pic_order_count_lsb;
} else {
picOrderCntMsb = prevPicOrderCntMsb;
}
pictureOrderCounts = Mp4Arrays.copyOfAndAppend(pictureOrderCounts, picOrderCntMsb + picOrderCountLsb);
prevPicOrderCntLsb = picOrderCountLsb;
prevPicOrderCntMsb = picOrderCntMsb;
} else if (sh.sps.pic_order_cnt_type == 1) {
/*if (seiMessage != null && seiMessage.clock_timestamp_flag) {
offset = seiMessage.n_frames - frameNrInGop;
} else if (seiMessage != null && seiMessage.removal_delay_flag) {
offset = seiMessage.dpb_removal_delay / 2;
}
if (seiMessage == null) {
LOG.warning("CTS timing in ctts box is most likely not OK");
}*/
throw new RuntimeException("pic_order_cnt_type == 1 needs to be implemented");
} else if (sh.sps.pic_order_cnt_type == 2) {
pictureOrderCounts = Mp4Arrays.copyOfAndAppend(pictureOrderCounts, samples.size());
}
sdtp.add(sampleDependency);
frameNrInGop++;
samples.add(bb);
if (IdrPicFlag) { // IDR Picture
stss.add(samples.size());
}
}
private int calcPoc(int absFrameNum, H264NalUnitHeader nu, SliceHeader sh) {
if (sh.sps.pic_order_cnt_type == 0) {
return calcPOC0(nu, sh);
} else if (sh.sps.pic_order_cnt_type == 1) {
return calcPOC1(absFrameNum, nu, sh);
} else {
return calcPOC2(absFrameNum, nu, sh);
}
}
private int calcPOC2(int absFrameNum, H264NalUnitHeader nu, SliceHeader sh) {
if (nu.nal_ref_idc == 0)
return 2 * absFrameNum - 1;
else
return 2 * absFrameNum;
}
private int calcPOC1(int absFrameNum, H264NalUnitHeader nu, SliceHeader sh) {
if (sh.sps.num_ref_frames_in_pic_order_cnt_cycle == 0)
absFrameNum = 0;
if (nu.nal_ref_idc == 0 && absFrameNum > 0)
absFrameNum = absFrameNum - 1;
int expectedDeltaPerPicOrderCntCycle = 0;
for (int i = 0; i < sh.sps.num_ref_frames_in_pic_order_cnt_cycle; i++)
expectedDeltaPerPicOrderCntCycle += sh.sps.offsetForRefFrame[i];
int expectedPicOrderCnt;
if (absFrameNum > 0) {
int picOrderCntCycleCnt = (absFrameNum - 1) / sh.sps.num_ref_frames_in_pic_order_cnt_cycle;
int frameNumInPicOrderCntCycle = (absFrameNum - 1) % sh.sps.num_ref_frames_in_pic_order_cnt_cycle;
expectedPicOrderCnt = picOrderCntCycleCnt * expectedDeltaPerPicOrderCntCycle;
for (int i = 0; i <= frameNumInPicOrderCntCycle; i++)
expectedPicOrderCnt = expectedPicOrderCnt + sh.sps.offsetForRefFrame[i];
} else {
expectedPicOrderCnt = 0;
}
if (nu.nal_ref_idc == 0)
expectedPicOrderCnt = expectedPicOrderCnt + sh.sps.offset_for_non_ref_pic;
return expectedPicOrderCnt + sh.delta_pic_order_cnt_0;
}
private int calcPOC0(H264NalUnitHeader nu, SliceHeader sh) {
int pocCntLsb = sh.pic_order_cnt_lsb;
int maxPicOrderCntLsb = 1 << (sh.sps.log2_max_pic_order_cnt_lsb_minus4 + 4);
// TODO prevPicOrderCntMsb should be wrapped!!
int picOrderCntMsb;
if ((pocCntLsb < prevPicOrderCntLsb) && ((prevPicOrderCntLsb - pocCntLsb) >= (maxPicOrderCntLsb / 2)))
picOrderCntMsb = prevPicOrderCntMsb + maxPicOrderCntLsb;
else if ((pocCntLsb > prevPicOrderCntLsb) && ((pocCntLsb - prevPicOrderCntLsb) > (maxPicOrderCntLsb / 2)))
picOrderCntMsb = prevPicOrderCntMsb - maxPicOrderCntLsb;
else
picOrderCntMsb = prevPicOrderCntMsb;
if (nu.nal_ref_idc != 0) {
prevPicOrderCntMsb = picOrderCntMsb;
prevPicOrderCntLsb = pocCntLsb;
}
return picOrderCntMsb + pocCntLsb;
}
private void handlePPS(ByteBuffer data) throws IOException {
InputStream is = new ByteBufferBackedInputStream(data);
is.read();
PictureParameterSet _pictureParameterSet = PictureParameterSet.read(is);
if (firstPictureParameterSet == null) {
firstPictureParameterSet = _pictureParameterSet;
}
currentPictureParameterSet = _pictureParameterSet;
byte[] ppsBytes = toArray((ByteBuffer) data.rewind());
byte[] oldPpsSameId = ppsIdToPpsBytes.get(_pictureParameterSet.pic_parameter_set_id);
if (oldPpsSameId != null && !Arrays.equals(oldPpsSameId, ppsBytes)) {
throw new RuntimeException("OMG - I got two SPS with same ID but different settings! (AVC3 is the solution)");
} else {
if (oldPpsSameId == null) {
pictureParameterRangeMap.put(samples.size(), ppsBytes);
}
ppsIdToPpsBytes.put(_pictureParameterSet.pic_parameter_set_id, ppsBytes);
ppsIdToPps.put(_pictureParameterSet.pic_parameter_set_id, _pictureParameterSet);
}
}
private void handleSPS(ByteBuffer data) throws IOException {
InputStream spsInputStream = cleanBuffer(new ByteBufferBackedInputStream(data));
spsInputStream.read();
SeqParameterSet _seqParameterSet = SeqParameterSet.read(spsInputStream);
if (firstSeqParameterSet == null) {
firstSeqParameterSet = _seqParameterSet;
configureFramerate();
}
currentSeqParameterSet = _seqParameterSet;
byte[] spsBytes = toArray((ByteBuffer) data.rewind());
byte[] oldSpsSameId = spsIdToSpsBytes.get(_seqParameterSet.seq_parameter_set_id);
if (oldSpsSameId != null && !Arrays.equals(oldSpsSameId, spsBytes)) {
throw new RuntimeException("OMG - I got two SPS with same ID but different settings!");
} else {
if (oldSpsSameId != null) {
seqParameterRangeMap.put(samples.size(), spsBytes);
}
spsIdToSpsBytes.put(_seqParameterSet.seq_parameter_set_id, spsBytes);
spsIdToSps.put(_seqParameterSet.seq_parameter_set_id, _seqParameterSet);
}
}
private void configureFramerate() {
if (determineFrameRate) {
if (firstSeqParameterSet.vuiParams != null) {
timescale = firstSeqParameterSet.vuiParams.time_scale >> 1; // Not sure why, but I found this in several places, and it works...
frametick = firstSeqParameterSet.vuiParams.num_units_in_tick;
if (timescale == 0 || frametick == 0) {
LOG.warning("vuiParams contain invalid values: time_scale: " + timescale + " and frame_tick: " + frametick + ". Setting frame rate to 25fps");
timescale = 90000;
frametick = 3600;
}
if (timescale / frametick > 100) {
LOG.warning("Framerate is " + (timescale / frametick) + ". That is suspicious.");
}
} else {
LOG.warning("Can't determine frame rate. Guessing 25 fps");
timescale = 90000;
frametick = 3600;
}
}
}
public class ByteBufferBackedInputStream extends InputStream {
private final ByteBuffer buf;
public ByteBufferBackedInputStream(ByteBuffer buf) {
// make a coy of the buffer
this.buf = buf.duplicate();
}
public int read() throws IOException {
if (!buf.hasRemaining()) {
return -1;
}
return buf.get() & 0xFF;
}
public int read(byte[] bytes, int off, int len)
throws IOException {
if (!buf.hasRemaining()) {
return -1;
}
len = Math.min(len, buf.remaining());
buf.get(bytes, off, len);
return len;
}
}
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;
}
LOG.fine(this.toString());
}
}
@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;
}
}
}
