本文整理汇总了Java中com.google.android.exoplayer.util.CodecSpecificDataUtil.buildAacAudioSpecificConfig方法的典型用法代码示例。如果您正苦于以下问题：Java CodecSpecificDataUtil.buildAacAudioSpecificConfig方法的具体用法？Java CodecSpecificDataUtil.buildAacAudioSpecificConfig怎么用？Java CodecSpecificDataUtil.buildAacAudioSpecificConfig使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类com.google.android.exoplayer.util.CodecSpecificDataUtil的用法示例。
在下文中一共展示了CodecSpecificDataUtil.buildAacAudioSpecificConfig方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: parseHeader
import com.google.android.exoplayer.util.CodecSpecificDataUtil; //导入方法依赖的package包/类
/**
* Parses the sample header.
*/
private void parseHeader() {
adtsScratch.setPosition(0);
if (!hasOutputFormat) {
int audioObjectType = adtsScratch.readBits(2) + 1;
int sampleRateIndex = adtsScratch.readBits(4);
adtsScratch.skipBits(1);
int channelConfig = adtsScratch.readBits(3);
byte[] audioSpecificConfig = CodecSpecificDataUtil.buildAacAudioSpecificConfig(
audioObjectType, sampleRateIndex, channelConfig);
Pair<Integer, Integer> audioParams = CodecSpecificDataUtil.parseAacAudioSpecificConfig(
audioSpecificConfig);
MediaFormat mediaFormat = MediaFormat.createAudioFormat(MimeTypes.AUDIO_AAC,
MediaFormat.NO_VALUE, audioParams.second, audioParams.first,
Collections.singletonList(audioSpecificConfig));
frameDurationUs = (C.MICROS_PER_SECOND * 1024L) / mediaFormat.sampleRate;
output.format(mediaFormat);
hasOutputFormat = true;
} else {
adtsScratch.skipBits(10);
}
adtsScratch.skipBits(4);
sampleSize = adtsScratch.readBits(13) - 2 /* the sync word */ - HEADER_SIZE;
if (hasCrc) {
sampleSize -= CRC_SIZE;
}
}
示例2: parseAdtsHeader
import com.google.android.exoplayer.util.CodecSpecificDataUtil; //导入方法依赖的package包/类
/**
* Parses the sample header.
*/
private void parseAdtsHeader() {
adtsScratch.setPosition(0);
if (!hasOutputFormat) {
int audioObjectType = adtsScratch.readBits(2) + 1;
if (audioObjectType != 2) {
// The stream indicates AAC-Main (1), AAC-SSR (3) or AAC-LTP (4). When the stream indicates
// AAC-Main it's more likely that the stream contains HE-AAC (5), which cannot be
// represented correctly in the 2 bit audio_object_type field in the ADTS header. In
// practice when the stream indicates AAC-SSR or AAC-LTP it more commonly contains AAC-LC or
// HE-AAC. Since most Android devices don't support AAC-Main, AAC-SSR or AAC-LTP, and since
// indicating AAC-LC works for HE-AAC streams, we pretend that we're dealing with AAC-LC and
// hope for the best. In practice this often works.
// See: https://github.com/google/ExoPlayer/issues/774
// See: https://github.com/google/ExoPlayer/issues/1383
Log.w(TAG, "Detected audio object type: " + audioObjectType + ", but assuming AAC LC.");
audioObjectType = 2;
}
int sampleRateIndex = adtsScratch.readBits(4);
adtsScratch.skipBits(1);
int channelConfig = adtsScratch.readBits(3);
byte[] audioSpecificConfig = CodecSpecificDataUtil.buildAacAudioSpecificConfig(
audioObjectType, sampleRateIndex, channelConfig);
Pair<Integer, Integer> audioParams = CodecSpecificDataUtil.parseAacAudioSpecificConfig(
audioSpecificConfig);
MediaFormat mediaFormat = MediaFormat.createAudioFormat(null, MimeTypes.AUDIO_AAC,
MediaFormat.NO_VALUE, MediaFormat.NO_VALUE, C.UNKNOWN_TIME_US, audioParams.second,
audioParams.first, Collections.singletonList(audioSpecificConfig), null);
// In this class a sample is an access unit, but the MediaFormat sample rate specifies the
// number of PCM audio samples per second.
sampleDurationUs = (C.MICROS_PER_SECOND * 1024) / mediaFormat.sampleRate;
output.format(mediaFormat);
hasOutputFormat = true;
} else {
adtsScratch.skipBits(10);
}
adtsScratch.skipBits(4);
int sampleSize = adtsScratch.readBits(13) - 2 /* the sync word */ - HEADER_SIZE;
if (hasCrc) {
sampleSize -= CRC_SIZE;
}
setReadingSampleState(output, sampleDurationUs, 0, sampleSize);
}