diff options
author | Kelly Rauchenberger <fefferburbia@gmail.com> | 2015-03-12 16:43:49 -0400 |
---|---|---|
committer | Kelly Rauchenberger <fefferburbia@gmail.com> | 2015-03-12 16:43:49 -0400 |
commit | 4c0869841d9ee6f8cc567b3e9eb2249193fc9f83 (patch) | |
tree | ff24074432b0178516bb7e2c43e87e8a9d72cadc /src/muxer.cpp | |
parent | 1a392a79b0491c5acc766705698191ed2ed6c2e6 (diff) | |
download | therapy-4c0869841d9ee6f8cc567b3e9eb2249193fc9f83.tar.gz therapy-4c0869841d9ee6f8cc567b3e9eb2249193fc9f83.tar.bz2 therapy-4c0869841d9ee6f8cc567b3e9eb2249193fc9f83.zip |
Play a sound when you jump
Diffstat (limited to 'src/muxer.cpp')
-rw-r--r-- | src/muxer.cpp | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/muxer.cpp b/src/muxer.cpp new file mode 100644 index 0000000..0844faa --- /dev/null +++ b/src/muxer.cpp | |||
@@ -0,0 +1,111 @@ | |||
1 | #include "muxer.h" | ||
2 | #include <cstdlib> | ||
3 | #include <sndfile.h> | ||
4 | #include <portaudio.h> | ||
5 | #include <list> | ||
6 | |||
7 | #define SAMPLE_RATE (44100) | ||
8 | |||
9 | class Sound { | ||
10 | public: | ||
11 | Sound(const char* filename); | ||
12 | ~Sound(); | ||
13 | |||
14 | float* ptr; | ||
15 | unsigned long pos; | ||
16 | unsigned long len; | ||
17 | }; | ||
18 | |||
19 | struct Muxer { | ||
20 | std::list<Sound> playing; | ||
21 | PaStream* stream; | ||
22 | }; | ||
23 | |||
24 | inline void dealWithPaError(PaError err) | ||
25 | { | ||
26 | if (err != paNoError) | ||
27 | { | ||
28 | printf("PortAudio error: %s\n", Pa_GetErrorText(err)); | ||
29 | exit(-1); | ||
30 | } | ||
31 | } | ||
32 | |||
33 | int paMuxerCallback(const void*, void* outputBuffer, unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo*, PaStreamCallbackFlags, void* userData) | ||
34 | { | ||
35 | Muxer* muxer = (Muxer*) userData; | ||
36 | float* out = (float*) outputBuffer; | ||
37 | |||
38 | for (unsigned long i = 0; i<framesPerBuffer; i++) | ||
39 | { | ||
40 | unsigned long curAmount = 0; | ||
41 | *out = 0; | ||
42 | |||
43 | for (auto& sound : muxer->playing) | ||
44 | { | ||
45 | if (sound.pos < sound.len) | ||
46 | { | ||
47 | *out *= curAmount++; | ||
48 | *out += sound.ptr[sound.pos++]; | ||
49 | *out /= (float) curAmount; | ||
50 | } | ||
51 | } | ||
52 | |||
53 | out++; | ||
54 | } | ||
55 | |||
56 | return 0; | ||
57 | } | ||
58 | |||
59 | static Muxer* muxer; | ||
60 | |||
61 | void initMuxer() | ||
62 | { | ||
63 | muxer = new Muxer(); | ||
64 | |||
65 | dealWithPaError(Pa_Initialize()); | ||
66 | dealWithPaError(Pa_OpenDefaultStream(&(muxer->stream), 0, 1, paFloat32, SAMPLE_RATE, paFramesPerBufferUnspecified, paMuxerCallback, muxer)); | ||
67 | dealWithPaError(Pa_StartStream(muxer->stream)); | ||
68 | } | ||
69 | |||
70 | void destroyMuxer() | ||
71 | { | ||
72 | dealWithPaError(Pa_AbortStream(muxer->stream)); | ||
73 | dealWithPaError(Pa_CloseStream(muxer->stream)); | ||
74 | dealWithPaError(Pa_Terminate()); | ||
75 | |||
76 | delete muxer; | ||
77 | muxer = 0; | ||
78 | } | ||
79 | |||
80 | void playSound(const char* filename) | ||
81 | { | ||
82 | // First, clear out any sounds that have finished playing | ||
83 | muxer->playing.remove_if([] (Sound& value) { return value.pos >= value.len; }); | ||
84 | |||
85 | // Then, add the new sound | ||
86 | muxer->playing.emplace_back(filename); | ||
87 | } | ||
88 | |||
89 | Sound::Sound(const char* filename) | ||
90 | { | ||
91 | SF_INFO info; | ||
92 | SNDFILE* file = sf_open(filename, SFM_READ, &info); | ||
93 | if (file == nullptr) | ||
94 | { | ||
95 | printf("LibSndFile error: %s\n", sf_strerror(file)); | ||
96 | exit(-1); | ||
97 | } | ||
98 | |||
99 | ptr = (float*) malloc(info.frames * info.channels * sizeof(float)); | ||
100 | len = info.frames * info.channels; | ||
101 | pos = 0; | ||
102 | |||
103 | sf_readf_float(file, ptr, info.frames); | ||
104 | |||
105 | sf_close(file); | ||
106 | } | ||
107 | |||
108 | Sound::~Sound() | ||
109 | { | ||
110 | free(ptr); | ||
111 | } | ||