Mp4FromDashWriter fixes
* correct calculation of "co64" box and usage of 64bits offsets * generate one chunk for audio streams like ffmpeg does, attempt to fix cut-off audio * misc. cleanup
This commit is contained in:
kapodamy
parent
c891f2f1ed
commit
429ee7eb93
1 changed files with 50 additions and 29 deletions
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@ -6,6 +6,7 @@ import org.schabi.newpipe.streams.Mp4DashReader.Mp4DashChunk;
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import org.schabi.newpipe.streams.Mp4DashReader.Mp4DashSample;
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import org.schabi.newpipe.streams.Mp4DashReader.Mp4Track;
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import org.schabi.newpipe.streams.Mp4DashReader.TrunEntry;
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import org.schabi.newpipe.streams.Mp4DashReader.TrackKind;
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import org.schabi.newpipe.streams.io.SharpStream;
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import java.io.IOException;
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@ -22,6 +23,7 @@ public class Mp4FromDashWriter {
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private final static byte SAMPLES_PER_CHUNK = 6;// ffmpeg uses 2, basic uses 1 (with 60fps uses 21 or 22). NewPipe will use 6
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private final static long THRESHOLD_FOR_CO64 = 0xFFFEFFFFL;// near 3.999 GiB
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private final static int THRESHOLD_MOOV_LENGTH = (256 * 1024) + (2048 * 1024); // 2.2 MiB enough for: 1080p 60fps 00h35m00s
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private final static short SINGLE_CHUNK_SAMPLE_BUFFER = 256;
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private final long time;
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@ -145,7 +147,7 @@ public class Mp4FromDashWriter {
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// not allowed for very short tracks (less than 0.5 seconds)
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//
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outStream = output;
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int read = 8;// mdat box header size
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long read = 8;// mdat box header size
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long totalSampleSize = 0;
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int[] sampleExtra = new int[readers.length];
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int[] defaultMediaTime = new int[readers.length];
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@ -157,6 +159,8 @@ public class Mp4FromDashWriter {
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tablesInfo[i] = new TablesInfo();
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}
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boolean singleChunk = tracks.length == 1 && tracks[0].kind == TrackKind.Audio;
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//<editor-fold defaultstate="expanded" desc="calculate stbl sample tables size and required moov values">
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for (int i = 0; i < readers.length; i++) {
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int samplesSize = 0;
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@ -210,14 +214,21 @@ public class Mp4FromDashWriter {
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tablesInfo[i].stco = (tmp / SAMPLES_PER_CHUNK) + 1;// +1 for samples in first chunk
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tmp = tmp % SAMPLES_PER_CHUNK;
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if (tmp == 0) {
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if (singleChunk) {
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// avoid split audio streams in chunks
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tablesInfo[i].stsc = 1;
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tablesInfo[i].stsc_bEntries = new int[]{
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1, tablesInfo[i].stsz, 1
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};
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tablesInfo[i].stco = 1;
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} else if (tmp == 0) {
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tablesInfo[i].stsc = 2;// first chunk (init) and succesive chunks
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tablesInfo[i].stsc_bEntries = new int[]{
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1, SAMPLES_PER_CHUNK_INIT, 1,
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2, SAMPLES_PER_CHUNK, 1
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};
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} else {
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tablesInfo[i].stsc = 3;// first chunk (init) and succesive chunks and remain chunk
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tablesInfo[i].stsc = 3;// first chunk (init) and successive chunks and remain chunk
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tablesInfo[i].stsc_bEntries = new int[]{
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1, SAMPLES_PER_CHUNK_INIT, 1,
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2, SAMPLES_PER_CHUNK, 1,
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@ -268,10 +279,10 @@ public class Mp4FromDashWriter {
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} else {*/
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if (auxSize > 0) {
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int length = auxSize;
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byte[] buffer = new byte[8 * 1024];// 8 KiB
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byte[] buffer = new byte[64 * 1024];// 64 KiB
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while (length > 0) {
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int count = Math.min(length, buffer.length);
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outWrite(buffer, 0, count);
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outWrite(buffer, count);
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length -= count;
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}
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}
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@ -280,7 +291,7 @@ public class Mp4FromDashWriter {
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outSeek(ftyp_size);
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}
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// tablesInfo contais row counts
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// tablesInfo contains row counts
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// and after returning from make_moov() will contain table offsets
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make_moov(defaultMediaTime, tablesInfo, is64);
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@ -291,7 +302,7 @@ public class Mp4FromDashWriter {
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writeEntryArray(tablesInfo[i].stsc, tablesInfo[i].stsc_bEntries.length, tablesInfo[i].stsc_bEntries);
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tablesInfo[i].stsc_bEntries = null;
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if (tablesInfo[i].ctts > 0) {
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sampleCount[i] = 1;// index is not base zero
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sampleCount[i] = 1;// the index is not base zero
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sampleExtra[i] = -1;
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}
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}
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@ -303,8 +314,8 @@ public class Mp4FromDashWriter {
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outWrite(make_mdat(totalSampleSize, is64));
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int[] sampleIndex = new int[readers.length];
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int[] sizes = new int[SAMPLES_PER_CHUNK];
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int[] sync = new int[SAMPLES_PER_CHUNK];
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int[] sizes = new int[singleChunk ? SINGLE_CHUNK_SAMPLE_BUFFER : SAMPLES_PER_CHUNK];
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int[] sync = new int[singleChunk ? SINGLE_CHUNK_SAMPLE_BUFFER : SAMPLES_PER_CHUNK];
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int written = readers.length;
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while (written > 0) {
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@ -317,7 +328,12 @@ public class Mp4FromDashWriter {
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long chunkOffset = writeOffset;
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int syncCount = 0;
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int limit = sampleIndex[i] == 0 ? SAMPLES_PER_CHUNK_INIT : SAMPLES_PER_CHUNK;
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int limit;
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if (singleChunk) {
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limit = SINGLE_CHUNK_SAMPLE_BUFFER;
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} else {
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limit = sampleIndex[i] == 0 ? SAMPLES_PER_CHUNK_INIT : SAMPLES_PER_CHUNK;
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}
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int j = 0;
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for (; j < limit; j++) {
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@ -354,7 +370,7 @@ public class Mp4FromDashWriter {
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sizes[j] = sample.data.length;
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}
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outWrite(sample.data, 0, sample.data.length);
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outWrite(sample.data, sample.data.length);
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}
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if (j > 0) {
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@ -368,12 +384,18 @@ public class Mp4FromDashWriter {
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tablesInfo[i].stss = writeEntryArray(tablesInfo[i].stss, syncCount, sync);
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}
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if (tablesInfo[i].stco > 0) {
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if (is64) {
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tablesInfo[i].stco = writeEntry64(tablesInfo[i].stco, chunkOffset);
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} else {
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tablesInfo[i].stco = writeEntryArray(tablesInfo[i].stco, 1, (int) chunkOffset);
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}
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if (singleChunk) {
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tablesInfo[i].stco = -1;
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}
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}
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outRestore();
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}
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}
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@ -451,12 +473,12 @@ public class Mp4FromDashWriter {
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// <editor-fold defaultstate="expanded" desc="Utils">
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private void outWrite(byte[] buffer) throws IOException {
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outWrite(buffer, 0, buffer.length);
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outWrite(buffer, buffer.length);
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}
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private void outWrite(byte[] buffer, int offset, int count) throws IOException {
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private void outWrite(byte[] buffer, int count) throws IOException {
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writeOffset += count;
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outStream.write(buffer, offset, count);
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outStream.write(buffer, 0, count);
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}
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private void outSeek(long offset) throws IOException {
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@ -509,7 +531,6 @@ public class Mp4FromDashWriter {
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);
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if (extra >= 0) {
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//size += 4;// commented for auxiliar buffer !!!
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offset += 4;
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auxWrite(extra);
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}
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@ -531,7 +552,7 @@ public class Mp4FromDashWriter {
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if (moovSimulation) {
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writeOffset += buffer.length;
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} else if (auxBuffer == null) {
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outWrite(buffer, 0, buffer.length);
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outWrite(buffer, buffer.length);
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} else {
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auxBuffer.put(buffer);
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}
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@ -703,7 +724,7 @@ public class Mp4FromDashWriter {
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int mediaTime;
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if (tracks[index].trak.edst_elst == null) {
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// is a audio track ¿is edst/elst opcional for audio tracks?
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// is a audio track ¿is edst/elst optional for audio tracks?
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mediaTime = 0x00;// ffmpeg set this value as zero, instead of defaultMediaTime
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bMediaRate = 0x00010000;
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} else {
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@ -798,13 +819,13 @@ public class Mp4FromDashWriter {
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class TablesInfo {
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public int stts;
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public int stsc;
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public int[] stsc_bEntries;
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public int ctts;
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public int stsz;
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public int stsz_default;
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public int stss;
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public int stco;
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int stts;
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int stsc;
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int[] stsc_bEntries;
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int ctts;
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int stsz;
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int stsz_default;
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int stss;
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int stco;
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}
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}
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