|
punk@44
|
1 // The MIT License
|
|
punk@44
|
2
|
|
punk@44
|
3 // Copyright (c) 2009 Massachusetts Institute of Technology
|
|
punk@44
|
4
|
|
punk@44
|
5 // Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
punk@44
|
6 // of this software and associated documentation files (the "Software"), to deal
|
|
punk@44
|
7 // in the Software without restriction, including without limitation the rights
|
|
punk@44
|
8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
punk@44
|
9 // copies of the Software, and to permit persons to whom the Software is
|
|
punk@44
|
10 // furnished to do so, subject to the following conditions:
|
|
punk@44
|
11
|
|
punk@44
|
12 // The above copyright notice and this permission notice shall be included in
|
|
punk@44
|
13 // all copies or substantial portions of the Software.
|
|
punk@44
|
14
|
|
punk@44
|
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
punk@44
|
16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
punk@44
|
17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
punk@44
|
18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
punk@44
|
19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
punk@44
|
20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
punk@44
|
21 // THE SOFTWARE.
|
|
punk@44
|
22
|
|
punk@44
|
23 import Connectable::*;
|
|
punk@44
|
24 import GetPut::*;
|
|
punk@44
|
25 import ClientServer::*;
|
|
punk@44
|
26 import Vector::*;
|
|
punk@44
|
27 import FIFO::*;
|
|
punk@44
|
28 import FixedPoint::*;
|
|
punk@44
|
29
|
|
punk@44
|
30 //AWB includes
|
|
punk@44
|
31 `include "asim/provides/low_level_platform_interface.bsh"
|
|
punk@44
|
32 `include "asim/provides/soft_connections.bsh"
|
|
punk@44
|
33 `include "asim/provides/common_services.bsh"
|
|
punk@44
|
34
|
|
punk@44
|
35 // Local includes
|
|
punk@44
|
36 `include "asim/provides/audio_pipe_types.bsh"
|
|
punk@44
|
37 `include "asim/provides/path_types.bsh"
|
|
punk@44
|
38
|
|
punk@44
|
39 interface Mixer;
|
|
punk@53
|
40 method Action toMixer(AudioStream streamIn);
|
|
punk@53
|
41 interface Get#(AudioProcessorUnit) mainOut;
|
|
punk@44
|
42 endinterface
|
|
punk@44
|
43
|
|
punk@53
|
44 module [CONNECTED_MODULE] mkMixer#(Integer numVoices, Vector#(numVoices, Volume) scalars) (Mixer);
|
|
punk@44
|
45
|
|
punk@53
|
46 function Bool isAudioFini(Vector#(numVoices, Reg#(Bool)) voiceStat);
|
|
punk@53
|
47 Bool result = True;
|
|
punk@53
|
48 for (Integer i = 0; i < numVoices; i = i+1)
|
|
punk@53
|
49 begin
|
|
punk@53
|
50 result = voiceStat[i] && result;
|
|
punk@53
|
51 end
|
|
punk@53
|
52 return result;
|
|
punk@53
|
53 endfunction
|
|
punk@44
|
54
|
|
punk@44
|
55
|
|
punk@44
|
56 // Instantiate the modules
|
|
punk@53
|
57 Vector#(numVoices, FIFO#(AudioPipeUnit)) voicesIn <- replicateM(mkFIFO());
|
|
punk@44
|
58 // <- newVector();
|
|
punk@53
|
59 Vector#(numVoices, Reg#(Bool)) voiceFini <- replicateM(mkReg(False));
|
|
punk@44
|
60
|
|
punk@44
|
61 FIFO#(AudioProcessorUnit) masterFifo <- mkFIFO();
|
|
punk@44
|
62
|
|
punk@44
|
63 rule sendEnd(isAudioFini(voiceFini));
|
|
punk@44
|
64 masterFifo.enq(tagged EndOfFile);
|
|
punk@44
|
65 //prep for reset
|
|
punk@53
|
66 for (Integer i = 0; i < numVoices; i = i+1)
|
|
punk@44
|
67 voiceFini[i] <= False;
|
|
punk@44
|
68 endrule
|
|
punk@44
|
69
|
|
punk@44
|
70 rule processSample(!isAudioFini(voiceFini)); //implicit on all voiceFifos having data
|
|
punk@44
|
71 FixedPoint#(32,32) sum = 0; //this should allow 16 voices at 16 bits without messing up
|
|
punk@68
|
72 Integer numValid = 0;
|
|
punk@53
|
73 for (Integer i = 0; i < numVoices; i = i+1)
|
|
punk@44
|
74 begin
|
|
punk@44
|
75 if (voicesIn[i].first() matches tagged Valid .data)
|
|
punk@44
|
76 begin
|
|
punk@44
|
77 case (data) matches
|
|
punk@44
|
78 tagged Sample .sample :
|
|
punk@68
|
79 begin //shifting right 8 to divide by 256
|
|
punk@68
|
80 sum = sum + ((fromInt(sample) * fromInt(scalars[i])) >> 8);
|
|
punk@68
|
81 numValid = numValid + 1;
|
|
punk@68
|
82 end
|
|
punk@44
|
83 tagged EndOfFile :
|
|
punk@44
|
84 voiceFini[i] <= True;
|
|
punk@44
|
85 endcase
|
|
punk@44
|
86 end
|
|
punk@44
|
87 else voiceFini[i] <= True;
|
|
punk@44
|
88 voicesIn[i].deq();
|
|
punk@44
|
89 end
|
|
punk@68
|
90 if (numValid > 0) // If nothing is valid, don't send anything
|
|
punk@68
|
91 masterFifo.enq(tagged Sample truncate(fxptGetInt(sum >> numVoices)));
|
|
punk@44
|
92 endrule
|
|
punk@44
|
93
|
|
punk@44
|
94 // Internal connections
|
|
punk@44
|
95
|
|
punk@53
|
96 method Action toMixer(AudioStream streamIn);
|
|
punk@53
|
97 voicesIn[streamIn.voice].enq(streamIn.data);
|
|
punk@53
|
98 endmethod
|
|
punk@53
|
99
|
|
punk@53
|
100 interface Get mainOut = fifoToGet(masterFifo);
|
|
punk@44
|
101
|
|
punk@44
|
102 endmodule
|
