public void Parse_TestData_ReturnsValidFrame()
{
var testCodecInfo = new AACCodecInfo
{
ConfigBytes = new byte[] { 20, 8 },
IndexDeltaLength = 3,
IndexLength = 3,
SizeLength = 13
};
byte[] testBytes = Convert.FromBase64String(
"ABAPyAE2Nay0eJ0OEMF4cOFyZeskqICVBWXLiAFDYHBG3GXFf0r/3nn+pRYcsdweO8Pzlxhjm0Q5QrEf7jx31b1PX8VuZOcZZ516jVY6sW/ISf8SQb6fONzpYJLiNRi7SO1o+" +
"ByL8qHHiUeF9EoqyQ1VgamBApL8XaznlKoszkm9Td02961s0SznSmtSZcuhaEYCZaPe1k5qM+U3wHzs3CCnWMSNsK9UNCq1dzSm4YZWRkJPIY4oXJXsSCW67r8Xdb4slBDvxqu709z" +
"ggyqrTuoOtkR3aHhFs6JHL8QwVgiusj39H8FrZ8Nu3Dt3qu0NQo5KpHN4R1jn2G71VHMfJwGEwZisU2e9Pz3h316dvpt97XbNcxLTgUCz9UpleUNXWAeygFCrPGTpWFv1Qn3JxS4W1xI" +
"W5W/dHymYM5ElSMhtF+PFounb/IKbxKJThTUkxx3FWwYt00q7nMOilx2t6odQue/bTaENXKw304l1X5aiEl2S4+C0pIEzkHpbMp+5bmLw1+M8FNRkzlEngnPPATaJQSNOqTHTwVmK+" +
"fAVSESminLM1TAOg0EZUw0pLTl3ka+scMp9kmxkFKLr3YRip0Uy0JMSnfefWxGezotf3sbV4afJZrnuVnKyanaK33korbN4LMIhvBgAAAAAAAAAAAAAAAAAAAAAAAAAA70=");
byte[] frameBytes = Convert.FromBase64String(
"ATY1rLR4nQ4QwXhw4XJl6ySogJUFZcuIAUNgcEbcZcV/Sv/eef6lFhyx3B47w/OXGGObRDlCsR/uPHfVvU9fxW5k5xlnnXqNVjqxb8hJ/xJBvp843OlgkuI1GLtI7Wj4HIvyoce" +
"JR4X0SirJDVWBqYECkvxdrOeUqizOSb1N3Tb3rWzRLOdKa1Jly6FoRgJlo97WTmoz5TfAfOzcIKdYxI2wr1Q0KrV3NKbhhlZGQk8hjihclexIJbruvxd1viyUEO/Gq7vT3OCDKqtO6" +
"g62RHdoeEWzokcvxDBWCK6yPf0fwWtnw27cO3eq7Q1Cjkqkc3hHWOfYbvVUcx8nAYTBmKxTZ70/PeHfXp2+m33tds1zEtOBQLP1SmV5Q1dYB7KAUKs8ZOlYW/VCfcnFLhbXEhblb90f" +
"KZgzkSVIyG0X48Wi6dv8gpvEolOFNSTHHcVbBi3TSrucw6KXHa3qh1C579tNoQ1crDfTiXVflqISXZLj4LSkgTOQelsyn7luYvDX4zwU1GTOUSeCc88BNolBI06pMdPBWYr58BVIRKaK" +
"cszVMA6DQRlTDSktOXeRr6xwyn2SbGQUouvdhGKnRTLQkxKd959bEZ7Oi1/extXhp8lmue5WcrJqdorfeSits3gswiG8GAAAAAAAAAAAAAAAAAAAAAAAAAADvQ==");
RawAACFrame frame = null;
var parser = new AACAudioPayloadParser(testCodecInfo);
parser.FrameGenerated = rawFrame => frame = (RawAACFrame)rawFrame;
parser.Parse(TimeSpan.Zero, new ArraySegment <byte>(testBytes), true);
Assert.IsNotNull(frame);
Assert.AreEqual(FrameType.Audio, frame.Type);
Assert.IsTrue(frame.ConfigSegment.SequenceEqual(testCodecInfo.ConfigBytes));
Assert.IsTrue(frame.FrameSegment.SequenceEqual(frameBytes));
}
/// <summary>
/// Creates media frame data segments.
/// </summary>
/// <param name="mediaFrame">Media frame.</param>
/// <param name="metadataRequired">Indicates whether to include metadata.</param>
/// <returns>An array of data segments.</returns>
private static ArraySegment <byte>[] CreateDataSegments(RawFrame mediaFrame, bool metadataRequired)
{
if (!metadataRequired)
{
return new[] { new byte[] { 0 }, mediaFrame.FrameSegment }
}
;
var codecName = mediaFrame switch
{
RawAACFrame _ => "AAC",
RawG711AFrame _ => "G711A",
RawG711UFrame _ => "G711U",
RawG726Frame _ => "G726",
RawPCMFrame _ => "PCM",
RawH264IFrame _ => "H264",
RawH264PFrame _ => "H264",
RawJpegFrame _ => "MJPEG",
_ => string.Empty
};
var bitsPerCodedUnit = mediaFrame switch
{
RawG726Frame rawG726Frame => rawG726Frame.BitsPerCodedSample,
_ => 0
};
var configSegment = mediaFrame switch
{
RawAACFrame rawAacFrame => rawAacFrame.ConfigSegment,
RawH264IFrame rawH264IFrame => rawH264IFrame.SpsPpsSegment,
_ => default
};
var codecBytes = Encoding.UTF8.GetBytes(codecName);
Array.Resize(ref codecBytes, 10);
var metaSegment = new byte[19];
using var stream = new MemoryStream(metaSegment);
using var writer = new EndianBinaryWriter(stream);
writer.Write((byte)1);
writer.Write(codecBytes);
writer.Write(bitsPerCodedUnit);
writer.Write(configSegment.Count);
return(configSegment.Count > 0
? new[] { metaSegment, configSegment, mediaFrame.FrameSegment }
: new[] { metaSegment, mediaFrame.FrameSegment });
}
public override void Parse(TimeSpan timeOffset, ArraySegment <byte> byteSegment, bool markerBit)
{
int auHeadersBitLength = BigEndianConverter.ReadUInt16(byteSegment.Array, byteSegment.Offset);
int auHeadersLengthBytes = (auHeadersBitLength + 7) / 8;
int headerBitSize = _codecInfo.SizeLength + _codecInfo.IndexLength;
int audioBitsAvail = auHeadersBitLength - headerBitSize;
if (audioBitsAvail < 0 || headerBitSize <= 0)
{
return;
}
int framesCount = 1 + audioBitsAvail / (_codecInfo.SizeLength + _codecInfo.IndexDeltaLength);
_bitStreamReader.ReInitialize(byteSegment.SubSegment(2));
int offset = byteSegment.Offset + auHeadersLengthBytes;
for (int i = 0; i < framesCount; ++i)
{
int frameSize = _bitStreamReader.ReadBits(_codecInfo.SizeLength);
if (i == 0)
{
_bitStreamReader.ReadBits(_codecInfo.IndexLength);
}
else if (_codecInfo.IndexDeltaLength != 0)
{
_bitStreamReader.ReadBits(_codecInfo.IndexDeltaLength);
}
Debug.Assert(byteSegment.Array != null, "byteSegment.Array != null");
var frameBytes = new ArraySegment <byte>(byteSegment.Array, offset, frameSize);
DateTime timestamp = GetFrameTimestamp(timeOffset);
var aacFrame = new RawAACFrame(timestamp, frameBytes,
new ArraySegment <byte>(_codecInfo.ConfigBytes));
OnFrameGenerated(aacFrame);
offset += frameSize;
}
}
public void Parse_TestData_ReturnsValidFrame()
{
var testCodecInfo = new AACCodecInfo
{
ConfigBytes = new byte[] { 20, 8 },
IndexDeltaLength = 3,
IndexLength = 3,
SizeLength = 13
};
byte[] testBytes = Convert.FromBase64String(
"ABAPyAE2Nay0eJ0OEMF4cOFyZeskqICVBWXLiAFDYHBG3GXFf0r/3nn+pRYcsdweO8Pzlxhjm0Q5QrEf7jx31b1PX8VuZOcZZ516jVY6sW/ISf8SQb6fONzpYJLiNRi7SO1o+" +
"ByL8qHHiUeF9EoqyQ1VgamBApL8XaznlKoszkm9Td02961s0SznSmtSZcuhaEYCZaPe1k5qM+U3wHzs3CCnWMSNsK9UNCq1dzSm4YZWRkJPIY4oXJXsSCW67r8Xdb4slBDvxqu709z" +
"ggyqrTuoOtkR3aHhFs6JHL8QwVgiusj39H8FrZ8Nu3Dt3qu0NQo5KpHN4R1jn2G71VHMfJwGEwZisU2e9Pz3h316dvpt97XbNcxLTgUCz9UpleUNXWAeygFCrPGTpWFv1Qn3JxS4W1xI" +
"W5W/dHymYM5ElSMhtF+PFounb/IKbxKJThTUkxx3FWwYt00q7nMOilx2t6odQue/bTaENXKw304l1X5aiEl2S4+C0pIEzkHpbMp+5bmLw1+M8FNRkzlEngnPPATaJQSNOqTHTwVmK+" +
"fAVSESminLM1TAOg0EZUw0pLTl3ka+scMp9kmxkFKLr3YRip0Uy0JMSnfefWxGezotf3sbV4afJZrnuVnKyanaK33korbN4LMIhvBgAAAAAAAAAAAAAAAAAAAAAAAAAA70=");
byte[] frameBytes = Convert.FromBase64String(
"D8gBNjWstHidDhDBeHDhcmXrJKiAlQVly4gBQ2BwRtxlxX9K/955/qUWHLHcHjvD85cYY5tEOUKxH+48d9W9T1/FbmTnGWedeo1" +
"WOrFvyEn/EkG+nzjc6WCS4jUYu0jtaPgci/Khx4lHhfRKKskNVYGpgQKS/F2s55SqLM5JvU3dNvetbNEs50prUmXLoWhGAmWj3tZO" +
"ajPlN8B87Nwgp1jEjbCvVDQqtXc0puGGVkZCTyGOKFyV7Egluu6/F3W+LJQQ78aru9Pc4IMqq07qDrZEd2h4RbOiRy/EMFYIrrI9/R/" +
"Ba2fDbtw7d6rtDUKOSqRzeEdY59hu9VRzHycBhMGYrFNnvT894d9enb6bfe12zXMS04FAs/VKZXlDV1gHsoBQqzxk6Vhb9UJ9ycUuFt" +
"cSFuVv3R8pmDORJUjIbRfjxaLp2/yCm8SiU4U1JMcdxVsGLdNKu5zDopcdreqHULnv202hDVysN9OJdV+WohJdkuPgtKSBM5B6WzKfuW" +
"5i8NfjPBTUZM5RJ4JzzwE2iUEjTqkx08FZivnwFUhEpopyzNUwDoNBGVMNKS05d5GvrHDKfZJsZBSi692EYqdFMtCTEp33n1sRns6LX97" +
"G1eGnyWa57lZysmp2it95KK2zeCzCIbwYAAAAAAAAAAAAAAAAAAAAAAAAAA==");
RawAACFrame frame = null;
var parser = new AACAudioPayloadParser(testCodecInfo);
parser.FrameGenerated = rawFrame => frame = (RawAACFrame)rawFrame;
parser.Parse(TimeSpan.Zero, new ArraySegment <byte>(testBytes), true);
Assert.IsNotNull(frame);
Assert.AreEqual(FrameType.Audio, frame.Type);
Assert.IsTrue(frame.ConfigSegment.SequenceEqual(testCodecInfo.ConfigBytes));
Assert.IsTrue(frame.FrameSegment.SequenceEqual(frameBytes));
}
