Java Code Examples for com.google.android.exoplayer2.util.ParsableBitArray#readBit()
The following examples show how to use
com.google.android.exoplayer2.util.ParsableBitArray#readBit() .
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Example 1
| Source File: LatmReader.java From MediaSDK with Apache License 2.0 | 6 votes |
|
/**
* Parses an AudioMuxElement as defined in 14496-3:2009, Section 1.7.3.1, Table 1.41.
*
* @param data A {@link ParsableBitArray} containing the AudioMuxElement's bytes.
*/
private void parseAudioMuxElement(ParsableBitArray data) throws ParserException {
boolean useSameStreamMux = data.readBit();
if (!useSameStreamMux) {
streamMuxRead = true;
parseStreamMuxConfig(data);
} else if (!streamMuxRead) {
return; // Parsing cannot continue without StreamMuxConfig information.
}
if (audioMuxVersionA == 0) {
if (numSubframes != 0) {
throw new ParserException();
}
int muxSlotLengthBytes = parsePayloadLengthInfo(data);
parsePayloadMux(data, muxSlotLengthBytes);
if (otherDataPresent) {
data.skipBits((int) otherDataLenBits);
}
} else {
throw new ParserException(); // Not defined by ISO/IEC 14496-3:2009.
}
}
Example 2
| Source File: LatmReader.java From TelePlus-Android with GNU General Public License v2.0 | 6 votes |
|
/**
* Parses an AudioMuxElement as defined in 14496-3:2009, Section 1.7.3.1, Table 1.41.
*
* @param data A {@link ParsableBitArray} containing the AudioMuxElement's bytes.
*/
private void parseAudioMuxElement(ParsableBitArray data) throws ParserException {
boolean useSameStreamMux = data.readBit();
if (!useSameStreamMux) {
streamMuxRead = true;
parseStreamMuxConfig(data);
} else if (!streamMuxRead) {
return; // Parsing cannot continue without StreamMuxConfig information.
}
if (audioMuxVersionA == 0) {
if (numSubframes != 0) {
throw new ParserException();
}
int muxSlotLengthBytes = parsePayloadLengthInfo(data);
parsePayloadMux(data, muxSlotLengthBytes);
if (otherDataPresent) {
data.skipBits((int) otherDataLenBits);
}
} else {
throw new ParserException(); // Not defined by ISO/IEC 14496-3:2009.
}
}
Example 3
| Source File: DvbParser.java From TelePlus-Android with GNU General Public License v2.0 | 5 votes |
|
/**
* Parses a display definition segment, as defined by ETSI EN 300 743 7.2.1.
*/
private static DisplayDefinition parseDisplayDefinition(ParsableBitArray data) {
data.skipBits(4); // dds_version_number (4).
boolean displayWindowFlag = data.readBit();
data.skipBits(3); // Skip reserved.
int width = data.readBits(16);
int height = data.readBits(16);
int horizontalPositionMinimum;
int horizontalPositionMaximum;
int verticalPositionMinimum;
int verticalPositionMaximum;
if (displayWindowFlag) {
horizontalPositionMinimum = data.readBits(16);
horizontalPositionMaximum = data.readBits(16);
verticalPositionMinimum = data.readBits(16);
verticalPositionMaximum = data.readBits(16);
} else {
horizontalPositionMinimum = 0;
horizontalPositionMaximum = width;
verticalPositionMinimum = 0;
verticalPositionMaximum = height;
}
return new DisplayDefinition(width, height, horizontalPositionMinimum,
horizontalPositionMaximum, verticalPositionMinimum, verticalPositionMaximum);
}
Example 4
| Source File: DvbParser.java From Telegram-FOSS with GNU General Public License v2.0 | 5 votes |
|
/**
* Parses an object data segment, as defined by ETSI EN 300 743 7.2.5.
*
* @return The parsed object data.
*/
private static ObjectData parseObjectData(ParsableBitArray data) {
int objectId = data.readBits(16);
data.skipBits(4); // Skip object_version_number
int objectCodingMethod = data.readBits(2);
boolean nonModifyingColorFlag = data.readBit();
data.skipBits(1); // Skip reserved.
byte[] topFieldData = null;
byte[] bottomFieldData = null;
if (objectCodingMethod == OBJECT_CODING_STRING) {
int numberOfCodes = data.readBits(8);
// TODO: Parse and use character_codes.
data.skipBits(numberOfCodes * 16); // Skip character_codes.
} else if (objectCodingMethod == OBJECT_CODING_PIXELS) {
int topFieldDataLength = data.readBits(16);
int bottomFieldDataLength = data.readBits(16);
if (topFieldDataLength > 0) {
topFieldData = new byte[topFieldDataLength];
data.readBytes(topFieldData, 0, topFieldDataLength);
}
if (bottomFieldDataLength > 0) {
bottomFieldData = new byte[bottomFieldDataLength];
data.readBytes(bottomFieldData, 0, bottomFieldDataLength);
} else {
bottomFieldData = topFieldData;
}
}
return new ObjectData(objectId, nonModifyingColorFlag, topFieldData, bottomFieldData);
}
Example 5
| Source File: DvbParser.java From Telegram with GNU General Public License v2.0 | 5 votes |
|
/**
* Parses an object data segment, as defined by ETSI EN 300 743 7.2.5.
*
* @return The parsed object data.
*/
private static ObjectData parseObjectData(ParsableBitArray data) {
int objectId = data.readBits(16);
data.skipBits(4); // Skip object_version_number
int objectCodingMethod = data.readBits(2);
boolean nonModifyingColorFlag = data.readBit();
data.skipBits(1); // Skip reserved.
byte[] topFieldData = null;
byte[] bottomFieldData = null;
if (objectCodingMethod == OBJECT_CODING_STRING) {
int numberOfCodes = data.readBits(8);
// TODO: Parse and use character_codes.
data.skipBits(numberOfCodes * 16); // Skip character_codes.
} else if (objectCodingMethod == OBJECT_CODING_PIXELS) {
int topFieldDataLength = data.readBits(16);
int bottomFieldDataLength = data.readBits(16);
if (topFieldDataLength > 0) {
topFieldData = new byte[topFieldDataLength];
data.readBytes(topFieldData, 0, topFieldDataLength);
}
if (bottomFieldDataLength > 0) {
bottomFieldData = new byte[bottomFieldDataLength];
data.readBytes(bottomFieldData, 0, bottomFieldDataLength);
} else {
bottomFieldData = topFieldData;
}
}
return new ObjectData(objectId, nonModifyingColorFlag, topFieldData, bottomFieldData);
}
Example 6
| Source File: Ac4Util.java From MediaSDK with Apache License 2.0 | 5 votes |
|
private static int readVariableBits(ParsableBitArray data, int bitsPerRead) {
int value = 0;
while (true) {
value += data.readBits(bitsPerRead);
if (!data.readBit()) {
break;
}
value++;
value <<= bitsPerRead;
}
return value;
}
Example 7
| Source File: DvbParser.java From MediaSDK with Apache License 2.0 | 5 votes |
|
/**
* Parses an object data segment, as defined by ETSI EN 300 743 7.2.5.
*
* @return The parsed object data.
*/
private static ObjectData parseObjectData(ParsableBitArray data) {
int objectId = data.readBits(16);
data.skipBits(4); // Skip object_version_number
int objectCodingMethod = data.readBits(2);
boolean nonModifyingColorFlag = data.readBit();
data.skipBits(1); // Skip reserved.
@Nullable byte[] topFieldData = null;
@Nullable byte[] bottomFieldData = null;
if (objectCodingMethod == OBJECT_CODING_STRING) {
int numberOfCodes = data.readBits(8);
// TODO: Parse and use character_codes.
data.skipBits(numberOfCodes * 16); // Skip character_codes.
} else if (objectCodingMethod == OBJECT_CODING_PIXELS) {
int topFieldDataLength = data.readBits(16);
int bottomFieldDataLength = data.readBits(16);
if (topFieldDataLength > 0) {
topFieldData = new byte[topFieldDataLength];
data.readBytes(topFieldData, 0, topFieldDataLength);
}
if (bottomFieldDataLength > 0) {
bottomFieldData = new byte[bottomFieldDataLength];
data.readBytes(bottomFieldData, 0, bottomFieldDataLength);
} else {
bottomFieldData = topFieldData;
}
}
return new ObjectData(objectId, nonModifyingColorFlag, topFieldData, bottomFieldData);
}
Example 8
| Source File: DvbParser.java From MediaSDK with Apache License 2.0 | 4 votes |
|
/** Paint an 8-bit/pixel code string, as defined by ETSI EN 300 743 7.2.5.2, to a canvas. */
private static int paint8BitPixelCodeString(
ParsableBitArray data,
int[] clutEntries,
@Nullable byte[] clutMapTable,
int column,
int line,
@Nullable Paint paint,
Canvas canvas) {
boolean endOfPixelCodeString = false;
do {
int runLength = 0;
int clutIndex = 0;
int peek = data.readBits(8);
if (peek != 0x00) {
runLength = 1;
clutIndex = peek;
} else {
if (!data.readBit()) {
peek = data.readBits(7);
if (peek != 0x00) {
runLength = peek;
clutIndex = 0x00;
} else {
endOfPixelCodeString = true;
}
} else {
runLength = data.readBits(7);
clutIndex = data.readBits(8);
}
}
if (runLength != 0 && paint != null) {
paint.setColor(clutEntries[clutMapTable != null ? clutMapTable[clutIndex] : clutIndex]);
canvas.drawRect(column, line, column + runLength, line + 1, paint);
}
column += runLength;
} while (!endOfPixelCodeString);
return column;
}
Example 9
| Source File: DvbParser.java From Telegram-FOSS with GNU General Public License v2.0 | 4 votes |
|
/**
* Paint a 2-bit/pixel code string, as defined by ETSI EN 300 743 7.2.5.2, to a canvas.
*/
private static int paint2BitPixelCodeString(ParsableBitArray data, int[] clutEntries,
byte[] clutMapTable, int column, int line, Paint paint, Canvas canvas) {
boolean endOfPixelCodeString = false;
do {
int runLength = 0;
int clutIndex = 0;
int peek = data.readBits(2);
if (peek != 0x00) {
runLength = 1;
clutIndex = peek;
} else if (data.readBit()) {
runLength = 3 + data.readBits(3);
clutIndex = data.readBits(2);
} else if (data.readBit()) {
runLength = 1;
} else {
switch (data.readBits(2)) {
case 0x00:
endOfPixelCodeString = true;
break;
case 0x01:
runLength = 2;
break;
case 0x02:
runLength = 12 + data.readBits(4);
clutIndex = data.readBits(2);
break;
case 0x03:
runLength = 29 + data.readBits(8);
clutIndex = data.readBits(2);
break;
}
}
if (runLength != 0 && paint != null) {
paint.setColor(clutEntries[clutMapTable != null ? clutMapTable[clutIndex] : clutIndex]);
canvas.drawRect(column, line, column + runLength, line + 1, paint);
}
column += runLength;
} while (!endOfPixelCodeString);
return column;
}
Example 10
| Source File: DvbParser.java From MediaSDK with Apache License 2.0 | 4 votes |
|
/** Paint a 4-bit/pixel code string, as defined by ETSI EN 300 743 7.2.5.2, to a canvas. */
private static int paint4BitPixelCodeString(
ParsableBitArray data,
int[] clutEntries,
@Nullable byte[] clutMapTable,
int column,
int line,
@Nullable Paint paint,
Canvas canvas) {
boolean endOfPixelCodeString = false;
do {
int runLength = 0;
int clutIndex = 0;
int peek = data.readBits(4);
if (peek != 0x00) {
runLength = 1;
clutIndex = peek;
} else if (!data.readBit()) {
peek = data.readBits(3);
if (peek != 0x00) {
runLength = 2 + peek;
clutIndex = 0x00;
} else {
endOfPixelCodeString = true;
}
} else if (!data.readBit()) {
runLength = 4 + data.readBits(2);
clutIndex = data.readBits(4);
} else {
switch (data.readBits(2)) {
case 0x00:
runLength = 1;
break;
case 0x01:
runLength = 2;
break;
case 0x02:
runLength = 9 + data.readBits(4);
clutIndex = data.readBits(4);
break;
case 0x03:
runLength = 25 + data.readBits(8);
clutIndex = data.readBits(4);
break;
}
}
if (runLength != 0 && paint != null) {
paint.setColor(clutEntries[clutMapTable != null ? clutMapTable[clutIndex] : clutIndex]);
canvas.drawRect(column, line, column + runLength, line + 1, paint);
}
column += runLength;
} while (!endOfPixelCodeString);
return column;
}
Example 11
| Source File: DvbParser.java From MediaSDK with Apache License 2.0 | 4 votes |
|
/** Paint a 2-bit/pixel code string, as defined by ETSI EN 300 743 7.2.5.2, to a canvas. */
private static int paint2BitPixelCodeString(
ParsableBitArray data,
int[] clutEntries,
@Nullable byte[] clutMapTable,
int column,
int line,
@Nullable Paint paint,
Canvas canvas) {
boolean endOfPixelCodeString = false;
do {
int runLength = 0;
int clutIndex = 0;
int peek = data.readBits(2);
if (peek != 0x00) {
runLength = 1;
clutIndex = peek;
} else if (data.readBit()) {
runLength = 3 + data.readBits(3);
clutIndex = data.readBits(2);
} else if (data.readBit()) {
runLength = 1;
} else {
switch (data.readBits(2)) {
case 0x00:
endOfPixelCodeString = true;
break;
case 0x01:
runLength = 2;
break;
case 0x02:
runLength = 12 + data.readBits(4);
clutIndex = data.readBits(2);
break;
case 0x03:
runLength = 29 + data.readBits(8);
clutIndex = data.readBits(2);
break;
}
}
if (runLength != 0 && paint != null) {
paint.setColor(clutEntries[clutMapTable != null ? clutMapTable[clutIndex] : clutIndex]);
canvas.drawRect(column, line, column + runLength, line + 1, paint);
}
column += runLength;
} while (!endOfPixelCodeString);
return column;
}
Example 12
| Source File: DvbParser.java From TelePlus-Android with GNU General Public License v2.0 | 4 votes |
|
/**
* Parses a region composition segment, as defined by ETSI EN 300 743 7.2.3.
*/
private static RegionComposition parseRegionComposition(ParsableBitArray data, int length) {
int id = data.readBits(8);
data.skipBits(4); // Skip region_version_number
boolean fillFlag = data.readBit();
data.skipBits(3); // Skip reserved.
int width = data.readBits(16);
int height = data.readBits(16);
int levelOfCompatibility = data.readBits(3);
int depth = data.readBits(3);
data.skipBits(2); // Skip reserved.
int clutId = data.readBits(8);
int pixelCode8Bit = data.readBits(8);
int pixelCode4Bit = data.readBits(4);
int pixelCode2Bit = data.readBits(2);
data.skipBits(2); // Skip reserved
int remainingLength = length - 10;
SparseArray<RegionObject> regionObjects = new SparseArray<>();
while (remainingLength > 0) {
int objectId = data.readBits(16);
int objectType = data.readBits(2);
int objectProvider = data.readBits(2);
int objectHorizontalPosition = data.readBits(12);
data.skipBits(4); // Skip reserved.
int objectVerticalPosition = data.readBits(12);
remainingLength -= 6;
int foregroundPixelCode = 0;
int backgroundPixelCode = 0;
if (objectType == 0x01 || objectType == 0x02) { // Only seems to affect to char subtitles.
foregroundPixelCode = data.readBits(8);
backgroundPixelCode = data.readBits(8);
remainingLength -= 2;
}
regionObjects.put(objectId, new RegionObject(objectType, objectProvider,
objectHorizontalPosition, objectVerticalPosition, foregroundPixelCode,
backgroundPixelCode));
}
return new RegionComposition(id, fillFlag, width, height, levelOfCompatibility, depth, clutId,
pixelCode8Bit, pixelCode4Bit, pixelCode2Bit, regionObjects);
}
Example 13
| Source File: DvbParser.java From Telegram with GNU General Public License v2.0 | 4 votes |
|
/**
* Parses a region composition segment, as defined by ETSI EN 300 743 7.2.3.
*/
private static RegionComposition parseRegionComposition(ParsableBitArray data, int length) {
int id = data.readBits(8);
data.skipBits(4); // Skip region_version_number
boolean fillFlag = data.readBit();
data.skipBits(3); // Skip reserved.
int width = data.readBits(16);
int height = data.readBits(16);
int levelOfCompatibility = data.readBits(3);
int depth = data.readBits(3);
data.skipBits(2); // Skip reserved.
int clutId = data.readBits(8);
int pixelCode8Bit = data.readBits(8);
int pixelCode4Bit = data.readBits(4);
int pixelCode2Bit = data.readBits(2);
data.skipBits(2); // Skip reserved
int remainingLength = length - 10;
SparseArray<RegionObject> regionObjects = new SparseArray<>();
while (remainingLength > 0) {
int objectId = data.readBits(16);
int objectType = data.readBits(2);
int objectProvider = data.readBits(2);
int objectHorizontalPosition = data.readBits(12);
data.skipBits(4); // Skip reserved.
int objectVerticalPosition = data.readBits(12);
remainingLength -= 6;
int foregroundPixelCode = 0;
int backgroundPixelCode = 0;
if (objectType == 0x01 || objectType == 0x02) { // Only seems to affect to char subtitles.
foregroundPixelCode = data.readBits(8);
backgroundPixelCode = data.readBits(8);
remainingLength -= 2;
}
regionObjects.put(objectId, new RegionObject(objectType, objectProvider,
objectHorizontalPosition, objectVerticalPosition, foregroundPixelCode,
backgroundPixelCode));
}
return new RegionComposition(id, fillFlag, width, height, levelOfCompatibility, depth, clutId,
pixelCode8Bit, pixelCode4Bit, pixelCode2Bit, regionObjects);
}
Example 14
| Source File: DvbParser.java From TelePlus-Android with GNU General Public License v2.0 | 4 votes |
|
/**
* Paint a 4-bit/pixel code string, as defined by ETSI EN 300 743 7.2.5.2, to a canvas.
*/
private static int paint4BitPixelCodeString(ParsableBitArray data, int[] clutEntries,
byte[] clutMapTable, int column, int line, Paint paint, Canvas canvas) {
boolean endOfPixelCodeString = false;
do {
int runLength = 0;
int clutIndex = 0;
int peek = data.readBits(4);
if (peek != 0x00) {
runLength = 1;
clutIndex = peek;
} else if (!data.readBit()) {
peek = data.readBits(3);
if (peek != 0x00) {
runLength = 2 + peek;
clutIndex = 0x00;
} else {
endOfPixelCodeString = true;
}
} else if (!data.readBit()) {
runLength = 4 + data.readBits(2);
clutIndex = data.readBits(4);
} else {
switch (data.readBits(2)) {
case 0x00:
runLength = 1;
break;
case 0x01:
runLength = 2;
break;
case 0x02:
runLength = 9 + data.readBits(4);
clutIndex = data.readBits(4);
break;
case 0x03:
runLength = 25 + data.readBits(8);
clutIndex = data.readBits(4);
break;
}
}
if (runLength != 0 && paint != null) {
paint.setColor(clutEntries[clutMapTable != null ? clutMapTable[clutIndex] : clutIndex]);
canvas.drawRect(column, line, column + runLength, line + 1, paint);
}
column += runLength;
} while (!endOfPixelCodeString);
return column;
}
Example 15
| Source File: DvbParser.java From Telegram-FOSS with GNU General Public License v2.0 | 4 votes |
|
/**
* Paint a 4-bit/pixel code string, as defined by ETSI EN 300 743 7.2.5.2, to a canvas.
*/
private static int paint4BitPixelCodeString(ParsableBitArray data, int[] clutEntries,
byte[] clutMapTable, int column, int line, Paint paint, Canvas canvas) {
boolean endOfPixelCodeString = false;
do {
int runLength = 0;
int clutIndex = 0;
int peek = data.readBits(4);
if (peek != 0x00) {
runLength = 1;
clutIndex = peek;
} else if (!data.readBit()) {
peek = data.readBits(3);
if (peek != 0x00) {
runLength = 2 + peek;
clutIndex = 0x00;
} else {
endOfPixelCodeString = true;
}
} else if (!data.readBit()) {
runLength = 4 + data.readBits(2);
clutIndex = data.readBits(4);
} else {
switch (data.readBits(2)) {
case 0x00:
runLength = 1;
break;
case 0x01:
runLength = 2;
break;
case 0x02:
runLength = 9 + data.readBits(4);
clutIndex = data.readBits(4);
break;
case 0x03:
runLength = 25 + data.readBits(8);
clutIndex = data.readBits(4);
break;
}
}
if (runLength != 0 && paint != null) {
paint.setColor(clutEntries[clutMapTable != null ? clutMapTable[clutIndex] : clutIndex]);
canvas.drawRect(column, line, column + runLength, line + 1, paint);
}
column += runLength;
} while (!endOfPixelCodeString);
return column;
}
Example 16
| Source File: DvbParser.java From Telegram with GNU General Public License v2.0 | 4 votes |
|
/**
* Paint a 2-bit/pixel code string, as defined by ETSI EN 300 743 7.2.5.2, to a canvas.
*/
private static int paint2BitPixelCodeString(ParsableBitArray data, int[] clutEntries,
byte[] clutMapTable, int column, int line, Paint paint, Canvas canvas) {
boolean endOfPixelCodeString = false;
do {
int runLength = 0;
int clutIndex = 0;
int peek = data.readBits(2);
if (peek != 0x00) {
runLength = 1;
clutIndex = peek;
} else if (data.readBit()) {
runLength = 3 + data.readBits(3);
clutIndex = data.readBits(2);
} else if (data.readBit()) {
runLength = 1;
} else {
switch (data.readBits(2)) {
case 0x00:
endOfPixelCodeString = true;
break;
case 0x01:
runLength = 2;
break;
case 0x02:
runLength = 12 + data.readBits(4);
clutIndex = data.readBits(2);
break;
case 0x03:
runLength = 29 + data.readBits(8);
clutIndex = data.readBits(2);
break;
}
}
if (runLength != 0 && paint != null) {
paint.setColor(clutEntries[clutMapTable != null ? clutMapTable[clutIndex] : clutIndex]);
canvas.drawRect(column, line, column + runLength, line + 1, paint);
}
column += runLength;
} while (!endOfPixelCodeString);
return column;
}
Example 17
| Source File: Ac4Util.java From Telegram with GNU General Public License v2.0 | 4 votes |
|
/**
* Returns AC-4 format information given {@code data} containing a syncframe. The reading position
* of {@code data} will be modified.
*
* @param data The data to parse, positioned at the start of the syncframe.
* @return The AC-4 format data parsed from the header.
*/
public static SyncFrameInfo parseAc4SyncframeInfo(ParsableBitArray data) {
int headerSize = 0;
int syncWord = data.readBits(16);
headerSize += 2;
int frameSize = data.readBits(16);
headerSize += 2;
if (frameSize == 0xFFFF) {
frameSize = data.readBits(24);
headerSize += 3; // Extended frame_size
}
frameSize += headerSize;
if (syncWord == AC41_SYNCWORD) {
frameSize += 2; // crc_word
}
int bitstreamVersion = data.readBits(2);
if (bitstreamVersion == 3) {
bitstreamVersion += readVariableBits(data, /* bitsPerRead= */ 2);
}
int sequenceCounter = data.readBits(10);
if (data.readBit()) { // b_wait_frames
if (data.readBits(3) > 0) { // wait_frames
data.skipBits(2); // reserved
}
}
int sampleRate = data.readBit() ? 48000 : 44100;
int frameRateIndex = data.readBits(4);
int sampleCount = 0;
if (sampleRate == 44100 && frameRateIndex == 13) {
sampleCount = SAMPLE_COUNT[frameRateIndex];
} else if (sampleRate == 48000 && frameRateIndex < SAMPLE_COUNT.length) {
sampleCount = SAMPLE_COUNT[frameRateIndex];
switch (sequenceCounter % 5) {
case 1: // fall through
case 3:
if (frameRateIndex == 3 || frameRateIndex == 8) {
sampleCount++;
}
break;
case 2:
if (frameRateIndex == 8 || frameRateIndex == 11) {
sampleCount++;
}
break;
case 4:
if (frameRateIndex == 3 || frameRateIndex == 8 || frameRateIndex == 11) {
sampleCount++;
}
break;
default:
break;
}
}
return new SyncFrameInfo(bitstreamVersion, CHANNEL_COUNT_2, sampleRate, frameSize, sampleCount);
}
Example 18
| Source File: DvbParser.java From MediaSDK with Apache License 2.0 | 4 votes |
|
/**
* Parses a region composition segment, as defined by ETSI EN 300 743 7.2.3.
*/
private static RegionComposition parseRegionComposition(ParsableBitArray data, int length) {
int id = data.readBits(8);
data.skipBits(4); // Skip region_version_number
boolean fillFlag = data.readBit();
data.skipBits(3); // Skip reserved.
int width = data.readBits(16);
int height = data.readBits(16);
int levelOfCompatibility = data.readBits(3);
int depth = data.readBits(3);
data.skipBits(2); // Skip reserved.
int clutId = data.readBits(8);
int pixelCode8Bit = data.readBits(8);
int pixelCode4Bit = data.readBits(4);
int pixelCode2Bit = data.readBits(2);
data.skipBits(2); // Skip reserved
int remainingLength = length - 10;
SparseArray<RegionObject> regionObjects = new SparseArray<>();
while (remainingLength > 0) {
int objectId = data.readBits(16);
int objectType = data.readBits(2);
int objectProvider = data.readBits(2);
int objectHorizontalPosition = data.readBits(12);
data.skipBits(4); // Skip reserved.
int objectVerticalPosition = data.readBits(12);
remainingLength -= 6;
int foregroundPixelCode = 0;
int backgroundPixelCode = 0;
if (objectType == 0x01 || objectType == 0x02) { // Only seems to affect to char subtitles.
foregroundPixelCode = data.readBits(8);
backgroundPixelCode = data.readBits(8);
remainingLength -= 2;
}
regionObjects.put(objectId, new RegionObject(objectType, objectProvider,
objectHorizontalPosition, objectVerticalPosition, foregroundPixelCode,
backgroundPixelCode));
}
return new RegionComposition(id, fillFlag, width, height, levelOfCompatibility, depth, clutId,
pixelCode8Bit, pixelCode4Bit, pixelCode2Bit, regionObjects);
}
Example 19
| Source File: DvbParser.java From TelePlus-Android with GNU General Public License v2.0 | 4 votes |
|
/**
* Paint a 2-bit/pixel code string, as defined by ETSI EN 300 743 7.2.5.2, to a canvas.
*/
private static int paint2BitPixelCodeString(ParsableBitArray data, int[] clutEntries,
byte[] clutMapTable, int column, int line, Paint paint, Canvas canvas) {
boolean endOfPixelCodeString = false;
do {
int runLength = 0;
int clutIndex = 0;
int peek = data.readBits(2);
if (peek != 0x00) {
runLength = 1;
clutIndex = peek;
} else if (data.readBit()) {
runLength = 3 + data.readBits(3);
clutIndex = data.readBits(2);
} else if (data.readBit()) {
runLength = 1;
} else {
switch (data.readBits(2)) {
case 0x00:
endOfPixelCodeString = true;
break;
case 0x01:
runLength = 2;
break;
case 0x02:
runLength = 12 + data.readBits(4);
clutIndex = data.readBits(2);
break;
case 0x03:
runLength = 29 + data.readBits(8);
clutIndex = data.readBits(2);
break;
}
}
if (runLength != 0 && paint != null) {
paint.setColor(clutEntries[clutMapTable != null ? clutMapTable[clutIndex] : clutIndex]);
canvas.drawRect(column, line, column + runLength, line + 1, paint);
}
column += runLength;
} while (!endOfPixelCodeString);
return column;
}
Example 20
| Source File: DvbParser.java From Telegram with GNU General Public License v2.0 | 4 votes |
|
/**
* Paint a 4-bit/pixel code string, as defined by ETSI EN 300 743 7.2.5.2, to a canvas.
*/
private static int paint4BitPixelCodeString(ParsableBitArray data, int[] clutEntries,
byte[] clutMapTable, int column, int line, Paint paint, Canvas canvas) {
boolean endOfPixelCodeString = false;
do {
int runLength = 0;
int clutIndex = 0;
int peek = data.readBits(4);
if (peek != 0x00) {
runLength = 1;
clutIndex = peek;
} else if (!data.readBit()) {
peek = data.readBits(3);
if (peek != 0x00) {
runLength = 2 + peek;
clutIndex = 0x00;
} else {
endOfPixelCodeString = true;
}
} else if (!data.readBit()) {
runLength = 4 + data.readBits(2);
clutIndex = data.readBits(4);
} else {
switch (data.readBits(2)) {
case 0x00:
runLength = 1;
break;
case 0x01:
runLength = 2;
break;
case 0x02:
runLength = 9 + data.readBits(4);
clutIndex = data.readBits(4);
break;
case 0x03:
runLength = 25 + data.readBits(8);
clutIndex = data.readBits(4);
break;
}
}
if (runLength != 0 && paint != null) {
paint.setColor(clutEntries[clutMapTable != null ? clutMapTable[clutIndex] : clutIndex]);
canvas.drawRect(column, line, column + runLength, line + 1, paint);
}
column += runLength;
} while (!endOfPixelCodeString);
return column;
}
