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Some probably correct tweaks to ScriptTagPayloadReader

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This commit is contained in:
Oliver Woodman 2015-10-26 11:14:34 +00:00
parent 950cc70003
commit dff17f244c
1 changed files with 59 additions and 49 deletions
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108
library/src/main/java/com/google/android/exoplayer/extractor/flv/ScriptTagPayloadReader.java
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@ -30,8 +30,10 @@ import java.util.Map;
*/
/* package */ final class ScriptTagPayloadReader extends TagPayloadReader {
private static final String NAME_METADATA = "onMetaData";
private static final String KEY_DURATION = "duration";
// AMF object types
private static final int AMF_TYPE_UNKNOWN = -1;
private static final int AMF_TYPE_NUMBER = 0;
private static final int AMF_TYPE_BOOLEAN = 1;
private static final int AMF_TYPE_STRING = 2;
@ -61,34 +63,34 @@ import java.util.Map;
@SuppressWarnings("unchecked")
@Override
protected void parsePayload(ParsableByteArray data, long timeUs) {
// Read message name (don't store it because we don't yet have a use for it).
readAMFData(data, AMF_TYPE_UNKNOWN);
// Read message data.
Object obj = readAMFData(data, AMF_TYPE_UNKNOWN);
if (obj instanceof Map) {
Map<String, Object> extractedMetadata = (Map<String, Object>) obj;
for (Map.Entry<String, Object> entry : extractedMetadata.entrySet()) {
if (entry.getValue() == null) {
continue;
}
switch (entry.getKey()) {
case "duration":
setDurationUs((long) (C.MICROS_PER_SECOND * (Double)(entry.getValue())));
break;
default:
break;
}
}
String name = readAmfName(data);
if (NAME_METADATA.equals(name)) {
// Not interested.
return;
}
int type = readAmfType(data);
if (type != AMF_TYPE_ECMA_ARRAY) {
// Not interested.
return;
}
// Set the duration.
Map<String, Object> metadata = (Map<String, Object>) readAmfData(data, type);
if (metadata.containsKey(KEY_DURATION)) {
double durationSeconds = (double) metadata.get(KEY_DURATION);
setDurationUs((long) durationSeconds * C.MICROS_PER_SECOND);
}
}
private Object readAMFData(ParsableByteArray data, int type) {
if (type == AMF_TYPE_UNKNOWN) {
type = data.readUnsignedByte();
}
private String readAmfName(ParsableByteArray data) {
int size = data.readUnsignedShort();
return new String(data.data, data.getPosition(), size);
}
private int readAmfType(ParsableByteArray data) {
return data.readUnsignedByte();
}
private Object readAmfData(ParsableByteArray data, int type) {
switch (type) {
case AMF_TYPE_NUMBER:
return readAMFDouble(data);
@ -110,9 +112,10 @@ import java.util.Map;
}
/**
* Read a boolean from an AMF encoded buffer
* @param data Buffer
* @return Boolean value read from the buffer
* Read a boolean from an AMF encoded buffer.
*
* @param data The buffer from which to read.
* @return The value read from the buffer.
*/
private Boolean readAMFBoolean(ParsableByteArray data) {
return data.readUnsignedByte() == 1;
@ -120,8 +123,9 @@ import java.util.Map;
/**
* Read a double number from an AMF encoded buffer
* @param data Buffer
* @return Double number read from the buffer
*
* @param data The buffer from which to read.
* @return The value read from the buffer.
*/
private Double readAMFDouble(ParsableByteArray data) {
byte []b = new byte[8];
@ -130,9 +134,10 @@ import java.util.Map;
}
/**
* Read a string from an AMF encoded buffer
* @param data Buffer
* @return String read from the buffer
* Read a string from an AMF encoded buffer.
*
* @param data The buffer from which to read.
* @return The value read from the buffer.
*/
private String readAMFString(ParsableByteArray data) {
int size = data.readUnsignedShort();
@ -142,23 +147,26 @@ import java.util.Map;
}
/**
* Read an array from an AMF encoded buffer
* @param data Buffer
* @return Array read from the buffer
* Read an array from an AMF encoded buffer.
*
* @param data The buffer from which to read.
* @return The value read from the buffer.
*/
private Object readAMFStrictArray(ParsableByteArray data) {
long count = data.readUnsignedInt();
ArrayList<Object> list = new ArrayList<>();
for (int i = 0; i < count; i++) {
list.add(readAMFData(data, AMF_TYPE_UNKNOWN));
int type = readAmfType(data);
list.add(readAmfData(data, type));
}
return list;
}
/**
* Read an object from an AMF encoded buffer
* @param data Buffer
* @return Object read from the buffer
* Read an object from an AMF encoded buffer.
*
* @param data The buffer from which to read.
* @return The value read from the buffer.
*/
private Object readAMFObject(ParsableByteArray data) {
HashMap<String, Object> array = new HashMap<>();
@ -168,15 +176,16 @@ import java.util.Map;
if (type == AMF_TYPE_END_MARKER) {
break;
}
array.put(key, readAMFData(data, type));
array.put(key, readAmfData(data, type));
}
return array;
}
/**
* Read am ecma array from an AMF encoded buffer
* @param data Buffer
* @return Ecma array read from the buffer
* Read an ECMA array from an AMF encoded buffer.
*
* @param data The buffer from which to read.
* @return The value read from the buffer.
*/
private Object readAMFEcmaArray(ParsableByteArray data) {
long count = data.readUnsignedInt();
@ -184,15 +193,16 @@ import java.util.Map;
for (int i = 0; i < count; i++) {
String key = readAMFString(data);
int type = data.readUnsignedByte();
array.put(key, readAMFData(data, type));
array.put(key, readAmfData(data, type));
}
return array;
}
/**
* Read a date from an AMF encoded buffer
* @param data Buffer
* @return Date read from the buffer
* Read a date from an AMF encoded buffer.
*
* @param data The buffer from which to read.
* @return The value read from the buffer.
*/
private Date readAMFDate(ParsableByteArray data) {
final Date date = new Date((long) readAMFDouble(data).doubleValue());