diff --git a/app/src/main/java/org/schabi/newpipe/streams/OggFromWebMWriter.java b/app/src/main/java/org/schabi/newpipe/streams/OggFromWebMWriter.java index 2b3d778c6..091ae6d2a 100644 --- a/app/src/main/java/org/schabi/newpipe/streams/OggFromWebMWriter.java +++ b/app/src/main/java/org/schabi/newpipe/streams/OggFromWebMWriter.java @@ -23,12 +23,16 @@ import javax.annotation.Nullable; public class OggFromWebMWriter implements Closeable { private static final byte FLAG_UNSET = 0x00; - //private static final byte FLAG_CONTINUED = 0x01; + private static final byte FLAG_CONTINUED = 0x01; private static final byte FLAG_FIRST = 0x02; private static final byte FLAG_LAST = 0x04; - private final static byte SEGMENTS_PER_PACKET = 50;// used in ffmpeg, which is near 1 second at 48kHz private final static byte HEADER_CHECKSUM_OFFSET = 22; + private final static byte HEADER_SIZE = 27; + + private final static short BUFFER_SIZE = 8 * 1024;// 8KiB + + private final static int TIME_SCALE_NS = 1000000000; private boolean done = false; private boolean parsed = false; @@ -38,10 +42,23 @@ public class OggFromWebMWriter implements Closeable { private int sequence_count = 0; private final int STREAM_ID; + private byte packet_flag = FLAG_FIRST; + private int track_index = 0; private WebMReader webm = null; private WebMTrack webm_track = null; - private int track_index = 0; + private Segment webm_segment = null; + private Cluster webm_cluster = null; + private SimpleBlock webm_block = null; + + private long webm_block_last_timecode = 0; + private long webm_block_near_duration = 0; + + private short segment_table_size = 0; + private final byte[] segment_table = new byte[255]; + private long segment_table_next_timestamp = TIME_SCALE_NS; + + private final int[] crc32_table = new int[256]; public OggFromWebMWriter(@NonNull SharpStream source, @NonNull SharpStream target) { if (!source.canRead() || !source.canRewind()) { @@ -139,9 +156,8 @@ public class OggFromWebMWriter implements Closeable { float resolution; int read; byte[] buffer; - int checksum; - byte flag = FLAG_FIRST;// obligatory + /* step 1: get the amount of frames per seconds */ switch (webm_track.kind) { case Audio: resolution = getSampleFrequencyFromTrack(webm_track.bMetadata); @@ -160,52 +176,65 @@ public class OggFromWebMWriter implements Closeable { throw new RuntimeException("not implemented"); } - /* step 1.1: write codec init data, in most cases must be present */ + /* step 2a: create packet with code init data */ + ArrayList data_extra = new ArrayList<>(4); + if (webm_track.codecPrivate != null) { addPacketSegment(webm_track.codecPrivate.length); - dump_packetHeader(flag, 0x00, webm_track.codecPrivate); - flag = FLAG_UNSET; + ByteBuffer buff = byte_buffer(HEADER_SIZE + segment_table_size + webm_track.codecPrivate.length); + + make_packetHeader(0x00, buff, webm_track.codecPrivate); + data_extra.add(buff.array()); } - /* step 1.2: write metadata */ + /* step 2b: create packet with metadata */ buffer = make_metadata(); if (buffer != null) { addPacketSegment(buffer.length); - dump_packetHeader(flag, 0x00, buffer); - flag = FLAG_UNSET; + ByteBuffer buff = byte_buffer(HEADER_SIZE + segment_table_size + buffer.length); + + make_packetHeader(0x00, buff, buffer); + data_extra.add(buff.array()); } - buffer = new byte[8 * 1024]; - /* step 1.3: write headers */ - long approx_packets = webm_segment.info.duration / webm_segment.info.timecodeScale; - approx_packets = approx_packets / (approx_packets / SEGMENTS_PER_PACKET); - - ArrayList pending_offsets = new ArrayList<>((int) approx_packets); - ArrayList pending_checksums = new ArrayList<>((int) approx_packets); - ArrayList data_offsets = new ArrayList<>((int) approx_packets); - - int page_size = 0; + /* step 3: calculate amount of packets */ SimpleBlock bloq; + int reserve_header = 0; + int headers_amount = 0; while (webm_segment != null) { bloq = getNextBlock(); - if (bloq != null && addPacketSegment(bloq.dataSize)) { - page_size += bloq.dataSize; - - if (segment_table_size < SEGMENTS_PER_PACKET) { - continue; - } - - // calculate the current packet duration using the next block - bloq = getNextBlock(); + if (addPacketSegment(bloq)) { + continue; } + reserve_header += HEADER_SIZE + segment_table_size;// header size + clearSegmentTable(); + webm_block = bloq; + headers_amount++; + } + + /* step 4: create packet headers */ + rewind_source(); + + ByteBuffer headers = byte_buffer(reserve_header); + short[] headers_size = new short[headers_amount]; + int header_index = 0; + + while (webm_segment != null) { + bloq = getNextBlock(); + + if (addPacketSegment(bloq)) { + continue; + } + + // calculate the current packet duration using the next block double elapsed_ns = webm_track.codecDelay; if (bloq == null) { - flag = FLAG_LAST; + packet_flag = FLAG_LAST;// note: if the flag is FLAG_CONTINUED, is changed elapsed_ns += webm_block_last_timecode; if (webm_track.defaultDuration > 0) { @@ -219,84 +248,83 @@ public class OggFromWebMWriter implements Closeable { } // get the sample count in the page - elapsed_ns = (elapsed_ns / 1000000000d) * resolution; - elapsed_ns = Math.ceil(elapsed_ns); - - long offset = output_offset + HEADER_CHECKSUM_OFFSET; - pending_offsets.add(offset); - - checksum = dump_packetHeader(flag, (long) elapsed_ns, null); - pending_checksums.add(checksum); - - data_offsets.add((short) (output_offset - offset)); - - // reserve space in the page - while (page_size > 0) { - int write = Math.min(page_size, buffer.length); - out_write(buffer, write); - page_size -= write; - } + elapsed_ns = elapsed_ns / TIME_SCALE_NS; + elapsed_ns = Math.ceil(elapsed_ns * resolution); + // create header + headers_size[header_index++] = make_packetHeader((long) elapsed_ns, headers, null); webm_block = bloq; } - /* step 2.1: write stream data */ - output.rewind(); - output_offset = 0; - source.rewind(); + /* step 5: calculate checksums */ + rewind_source(); - webm = new WebMReader(source); - webm.parse(); - webm_track = webm.selectTrack(track_index); + int offset = 0; + buffer = new byte[BUFFER_SIZE]; - for (int i = 0; i < pending_offsets.size(); i++) { - checksum = pending_checksums.get(i); - segment_table_size = 0; + for (header_index = 0; header_index < headers_size.length; header_index++) { + int checksum_offset = offset + HEADER_CHECKSUM_OFFSET; + int checksum = headers.getInt(checksum_offset); - out_seek(pending_offsets.get(i) + data_offsets.get(i)); - - while (segment_table_size < SEGMENTS_PER_PACKET) { + while (webm_segment != null) { bloq = getNextBlock(); - if (bloq == null || !addPacketSegment(bloq.dataSize)) { - webm_block = bloq;// use this block later (if not null) + if (!addPacketSegment(bloq)) { + clearSegmentTable(); + webm_block = bloq; break; } - // NOTE: calling bloq.data.close() is unnecessary - while ((read = bloq.data.read(buffer)) != -1) { - out_write(buffer, read); - checksum = calc_crc32(checksum, buffer, read); + // calculate page checksum + while ((read = bloq.data.read(buffer)) > 0) { + checksum = calc_crc32(checksum, buffer, 0, read); } } - pending_checksums.set(i, checksum); + headers.putInt(checksum_offset, checksum); + offset += headers_size[header_index]; } - /* step 2.2: write every checksum */ - output.rewind(); - output_offset = 0; - buffer = new byte[4]; + /* step 6: write extra headers */ + rewind_source(); - ByteBuffer buff = ByteBuffer.wrap(buffer); - buff.order(ByteOrder.LITTLE_ENDIAN); + for (byte[] buff : data_extra) { + output.write(buff); + } - for (int i = 0; i < pending_checksums.size(); i++) { - out_seek(pending_offsets.get(i)); - buff.putInt(0, pending_checksums.get(i)); - out_write(buffer); + /* step 7: write stream packets */ + byte[] headers_buffers = headers.array(); + offset = 0; + buffer = new byte[BUFFER_SIZE]; + + for (header_index = 0; header_index < headers_size.length; header_index++) { + output.write(headers_buffers, offset, headers_size[header_index]); + offset += headers_size[header_index]; + + while (webm_segment != null) { + bloq = getNextBlock(); + + if (addPacketSegment(bloq)) { + while ((read = bloq.data.read(buffer)) > 0) { + output.write(buffer, 0, read); + } + } else { + clearSegmentTable(); + webm_block = bloq; + break; + } + } } } - private int dump_packetHeader(byte flag, long gran_pos, byte[] immediate_page) throws IOException { - ByteBuffer buffer = ByteBuffer.allocate(27 + segment_table_size); + private short make_packetHeader(long gran_pos, ByteBuffer buffer, byte[] immediate_page) { + int offset = buffer.position(); + short length = HEADER_SIZE; - buffer.putInt(0x4F676753);// "OggS" binary string + buffer.putInt(0x5367674f);// "OggS" binary string in little-endian buffer.put((byte) 0x00);// version - buffer.put(flag);// type - - buffer.order(ByteOrder.LITTLE_ENDIAN); + buffer.put(packet_flag);// type buffer.putLong(gran_pos);// granulate position @@ -305,28 +333,24 @@ public class OggFromWebMWriter implements Closeable { buffer.putInt(0x00);// page checksum - buffer.order(ByteOrder.BIG_ENDIAN); - buffer.put((byte) segment_table_size);// segment table buffer.put(segment_table, 0, segment_table_size);// segment size - segment_table_size = 0;// clear segment table for next header + length += segment_table_size; - byte[] buff = buffer.array(); - int checksum_crc32 = calc_crc32(0x00, buff, buff.length); + clearSegmentTable();// clear segment table for next header + + int checksum_crc32 = calc_crc32(0x00, buffer.array(), offset, length); if (immediate_page != null) { - checksum_crc32 = calc_crc32(checksum_crc32, immediate_page, immediate_page.length); - buffer.order(ByteOrder.LITTLE_ENDIAN); - buffer.putInt(HEADER_CHECKSUM_OFFSET, checksum_crc32); - - out_write(buff); - out_write(immediate_page); - return 0; + checksum_crc32 = calc_crc32(checksum_crc32, immediate_page, 0, immediate_page.length); + System.arraycopy(immediate_page, 0, buffer.array(), length, immediate_page.length); + segment_table_next_timestamp -= TIME_SCALE_NS; } - out_write(buff); - return checksum_crc32; + buffer.putInt(offset + HEADER_CHECKSUM_OFFSET, checksum_crc32); + + return length; } @Nullable @@ -334,7 +358,7 @@ public class OggFromWebMWriter implements Closeable { if ("A_OPUS".equals(webm_track.codecId)) { return new byte[]{ 0x4F, 0x70, 0x75, 0x73, 0x54, 0x61, 0x67, 0x73,// "OpusTags" binary string - 0x07, 0x00, 0x00, 0x00,// writting application string size + 0x07, 0x00, 0x00, 0x00,// writing application string size 0x4E, 0x65, 0x77, 0x50, 0x69, 0x70, 0x65,// "NewPipe" binary string 0x00, 0x00, 0x00, 0x00// additional tags count (zero means no tags) }; @@ -342,15 +366,15 @@ public class OggFromWebMWriter implements Closeable { return new byte[]{ 0x03,// ???????? 0x76, 0x6f, 0x72, 0x62, 0x69, 0x73,// "vorbis" binary string - 0x07, 0x00, 0x00, 0x00,// writting application string size + 0x07, 0x00, 0x00, 0x00,// writing application string size 0x4E, 0x65, 0x77, 0x50, 0x69, 0x70, 0x65,// "NewPipe" binary string 0x01, 0x00, 0x00, 0x00,// additional tags count (zero means no tags) /* - // whole file duration (not implemented) - 0x44,// tag string size - 0x55, 0x52, 0x41, 0x54, 0x49, 0x4F, 0x4E, 0x3D, 0x30, 0x30, 0x3A, 0x30, 0x30, 0x3A, 0x30, - 0x30, 0x2E, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30 + // whole file duration (not implemented) + 0x44,// tag string size + 0x55, 0x52, 0x41, 0x54, 0x49, 0x4F, 0x4E, 0x3D, 0x30, 0x30, 0x3A, 0x30, 0x30, 0x3A, 0x30, + 0x30, 0x2E, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30 */ 0x0F,// tag string size 0x00, 0x00, 0x00, 0x45, 0x4E, 0x43, 0x4F, 0x44, 0x45, 0x52, 0x3D,// "ENCODER=" binary string @@ -363,13 +387,26 @@ public class OggFromWebMWriter implements Closeable { return null; } - // - private Segment webm_segment = null; - private Cluster webm_cluter = null; - private SimpleBlock webm_block = null; - private long webm_block_last_timecode = 0; - private long webm_block_near_duration = 0; + private void rewind_source() throws IOException { + source.rewind(); + webm = new WebMReader(source); + webm.parse(); + webm_track = webm.selectTrack(track_index); + webm_segment = webm.getNextSegment(); + webm_cluster = null; + webm_block = null; + webm_block_last_timecode = 0L; + + segment_table_next_timestamp = TIME_SCALE_NS; + } + + private ByteBuffer byte_buffer(int size) { + return ByteBuffer.allocate(size).order(ByteOrder.LITTLE_ENDIAN); + } + + // + @Nullable private SimpleBlock getNextBlock() throws IOException { SimpleBlock res; @@ -386,17 +423,17 @@ public class OggFromWebMWriter implements Closeable { } } - if (webm_cluter == null) { - webm_cluter = webm_segment.getNextCluster(); - if (webm_cluter == null) { + if (webm_cluster == null) { + webm_cluster = webm_segment.getNextCluster(); + if (webm_cluster == null) { webm_segment = null; return getNextBlock(); } } - res = webm_cluter.getNextSimpleBlock(); + res = webm_cluster.getNextSimpleBlock(); if (res == null) { - webm_cluter = null; + webm_cluster = null; return getNextBlock(); } @@ -421,49 +458,64 @@ public class OggFromWebMWriter implements Closeable { } // - // - private int segment_table_size = 0; - private final byte[] segment_table = new byte[255]; + // + private void clearSegmentTable() { + if (packet_flag != FLAG_CONTINUED) { + segment_table_next_timestamp += TIME_SCALE_NS; + packet_flag = FLAG_UNSET; + } + segment_table_size = 0; + } - private boolean addPacketSegment(long size) { - // check if possible add the segment, without overflow the table + private boolean addPacketSegment(SimpleBlock block) { + if (block == null) { + return false; + } + + long timestamp = block.absoluteTimeCodeNs + webm_track.codecDelay; + + if (timestamp >= segment_table_next_timestamp) { + return false; + } + + boolean result = addPacketSegment((int) block.dataSize); + + if (!result && segment_table_next_timestamp < timestamp) { + // WARNING: ¡¡¡¡ not implemented (lack of documentation) !!!! + packet_flag = FLAG_CONTINUED; + } + + return result; + } + + private boolean addPacketSegment(int size) { int available = (segment_table.length - segment_table_size) * 255; + boolean extra = size == 255; + + if (extra) { + // add a zero byte entry in the table + // required to indicate the sample size is exactly 255 + available -= 255; + } + + // check if possible add the segment, without overflow the table if (available < size) { return false;// not enough space on the page } - while (size > 0) { + for (; size > 0; size -= 255) { segment_table[segment_table_size++] = (byte) Math.min(size, 255); - size -= 255; + } + + if (extra) { + segment_table[segment_table_size++] = 0x00; } return true; } // - // - private long output_offset = 0; - - private void out_write(byte[] buffer) throws IOException { - output.write(buffer); - output_offset += buffer.length; - } - - private void out_write(byte[] buffer, int size) throws IOException { - output.write(buffer, 0, size); - output_offset += size; - } - - private void out_seek(long offset) throws IOException { - //if (output.canSeek()) { output.seek(offset); } - output.skip(offset - output_offset); - output_offset = offset; - } - // - // - private final int[] crc32_table = new int[256]; - private void populate_crc32_table() { for (int i = 0; i < 0x100; i++) { int crc = i << 24; @@ -476,10 +528,12 @@ public class OggFromWebMWriter implements Closeable { } } - private int calc_crc32(int initial_crc, byte[] buffer, int size) { - for (int i = 0; i < size; i++) { + private int calc_crc32(int initial_crc, byte[] buffer, int offset, int size) { + size += offset; + + for (; offset < size; offset++) { int reg = (initial_crc >>> 24) & 0xff; - initial_crc = (initial_crc << 8) ^ crc32_table[reg ^ (buffer[i] & 0xff)]; + initial_crc = (initial_crc << 8) ^ crc32_table[reg ^ (buffer[offset] & 0xff)]; } return initial_crc; diff --git a/app/src/main/java/us/shandian/giga/postprocessing/OggFromWebmDemuxer.java b/app/src/main/java/us/shandian/giga/postprocessing/OggFromWebmDemuxer.java index 65aa30fa3..605c0a88b 100644 --- a/app/src/main/java/us/shandian/giga/postprocessing/OggFromWebmDemuxer.java +++ b/app/src/main/java/us/shandian/giga/postprocessing/OggFromWebmDemuxer.java @@ -11,7 +11,7 @@ import java.nio.ByteBuffer; class OggFromWebmDemuxer extends Postprocessing { OggFromWebmDemuxer() { - super(false, true, ALGORITHM_OGG_FROM_WEBM_DEMUXER); + super(true, true, ALGORITHM_OGG_FROM_WEBM_DEMUXER); } @Override @@ -24,7 +24,7 @@ class OggFromWebmDemuxer extends Postprocessing { switch (buffer.getInt()) { case 0x1a45dfa3: - return true;// webm + return true;// webm/mkv case 0x4F676753: return false;// ogg }