You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
1.8 KiB
41 lines
1.8 KiB
function x = iAACoder2(AACSeq2, fNameOut)
|
|
%Implementation of WHAT?? //TODO!!
|
|
% Usage x = iAACoder2(AACSeq2, fNameOut), where:
|
|
% Inputs
|
|
% - fNameOut is the filename and path of the file that will be
|
|
% written after decoding
|
|
% - AACSeq2 is an array of structs containing K structs, where K is
|
|
% the number of computed frames. Every struct of the array consists
|
|
% of a frameType, a winType, chl.TNScoeffs which are the quantized TNS
|
|
% coefficients of this frame's left channel, chr.TNScoeffs which are
|
|
% the quantized TNS coefficients of this frame's right channel,
|
|
% chl.frameF which are the MDCT coefficients of this frame's left
|
|
% channel, chr.frameF which are the MDCT coefficients of this frame's
|
|
% right channel
|
|
%
|
|
% Output
|
|
% - x is an array containing the decoded audio samples
|
|
|
|
% Initializes an array to hold the decoded samples
|
|
decodedAudio(1024 * (length(AACSeq2) + 1), 2) = 0;
|
|
% Initializes an array to hold both audio channels
|
|
frameF(1024, 2) = 0;
|
|
|
|
% Decodes audio file
|
|
for i = 0:length(AACSeq2)-1
|
|
currFrameStart = i * 1024 + 1;
|
|
currFrameStop = currFrameStart + 2047;
|
|
frameF(:, 1) = AACSeq2(i+1).chl.frameF;
|
|
frameF(:, 2) = AACSeq2(i+1).chr.frameF;
|
|
TNScoeffsL = AACSeq2(i + 1).chl.TNScoeffs;
|
|
TNScoeffsR = AACSeq2(i + 1).chr.TNScoeffs;
|
|
frameF(:, 1) = iTNS(frameF(:, 1), AACSeq2(i+1).frameType, TNScoeffsL);
|
|
frameF(:, 2) = iTNS(frameF(:, 2), AACSeq2(i+1).frameType, TNScoeffsR);
|
|
frameT = iFilterbank(frameF, AACSeq2(i+1).frameType, AACSeq2(i+1).winType);
|
|
|
|
decodedAudio(currFrameStart:currFrameStop, :) = decodedAudio(currFrameStart:currFrameStop, :) + frameT;
|
|
end
|
|
|
|
audiowrite(fNameOut, decodedAudio, 48000);
|
|
x = decodedAudio;
|
|
end
|
|
|