MpegAudioUtil
@UnstableApi
class MpegAudioUtil
Utility methods for handling MPEG audio streams.
Summary
Nested types |
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class MpegAudioUtil.HeaderStores the metadata for an MPEG audio frame. |
Constants |
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const Int |
MAX_FRAME_SIZE_BYTES = 4096Theoretical maximum frame size for an MPEG audio stream, which occurs when playing a Layer 2 MPEG 2.5 audio stream at 16 kb/s (with padding). |
const Int |
MAX_RATE_BYTES_PER_SECOND = 40000Maximum rate for an MPEG audio stream corresponding to MPEG-1 layer III (320 kbit/s), in bytes per second. |
Public functions |
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java-static Int |
getFrameSize(headerData: Int)Returns the size of the frame associated with |
java-static Int |
parseMpegAudioFrameSampleCount(headerData: Int)Returns the number of samples per frame associated with |
Constants
MAX_FRAME_SIZE_BYTES
const val MAX_FRAME_SIZE_BYTES = 4096: Int
Theoretical maximum frame size for an MPEG audio stream, which occurs when playing a Layer 2 MPEG 2.5 audio stream at 16 kb/s (with padding). The size is 1152 sample/frame * 160000 bit/s / (8000 sample/s * 8 bit/byte) + 1 padding byte/frame = 2881 byte/frame. The next power of two size is 4 KiB.
MAX_RATE_BYTES_PER_SECOND
const val MAX_RATE_BYTES_PER_SECOND = 40000: Int
Maximum rate for an MPEG audio stream corresponding to MPEG-1 layer III (320 kbit/s), in bytes per second.
Public functions
getFrameSize
java-static fun getFrameSize(headerData: Int): Int
Returns the size of the frame associated with header, or LENGTH_UNSET if it is invalid.
parseMpegAudioFrameSampleCount
java-static fun parseMpegAudioFrameSampleCount(headerData: Int): Int
Returns the number of samples per frame associated with headerData, or LENGTH_UNSET if it is invalid.