Better circular buffer

source/engine/circbuf.c

@@ -1,52 +1,43 @@
 #include "circbuf.h"
 
-
+#include "assert.h"
-
 
 struct circbuf circbuf_init(size_t size, int len)
 {
     struct circbuf new;
-    new.size = size;
     new.len = len;
-    new.data = calloc(size, len);
+    new.data = calloc(sizeof(short), new.len);
-    new.head = new.tail = new.data;
+    new.read = new.write = 0;
 
     return new;
 }
 
-void cbuf_append(struct circbuf *buf, void *data, int n)
+int cbuf_size(struct circbuf *buf) {
-{
+    return buf->write - buf->read;
-
-    for (int i = 0; i < n; i++) {
-        memcpy(buf->head, data+(buf->size*i), buf->size);
-
-        buf->head += buf->size;
-
-        if (buf ->head == buf->data + buf->size*buf->len) buf->head = buf->data;
-    }
-
-/*
-    size_t cpbytes = n * buf->size;
-    size_t rembytes = (buf->size * buf->len) - (buf->head - buf->data);
-
-    if (cpbytes <= rembytes)
-        memcpy(buf->head, data, cpbytes);
-    else {
-        memcpy(buf->head, data, rembytes);
-        cpbytes -= rembytes;
-        buf->head = buf->data;
-        memcpy(buf->head, data+rembytes, cpbytes);
-    }
-*/
-
 }
 
-void *cbuf_take(struct circbuf *buf)
+int cbuf_empty(struct circbuf *buf) {
-{
+    return buf->read == buf->write;
-    void *ret = buf->tail;
-
-    if (buf->tail == buf->data + buf->len*buf->size) buf->tail = buf->data;
-    else buf->tail += buf->size;
-
-    return ret;
 }
+
+int cbuf_full(struct circbuf *buf) {
+    return cbuf_size(buf) == buf->len;
+}
+
+uint32_t cbuf_mask(struct circbuf *buf, uint32_t n) {
+    return n & (buf->len-1);
+}
+
+void cbuf_push(struct circbuf *buf, short data) {
+    assert(!cbuf_full(buf));
+
+    buf->data[cbuf_mask(buf,buf->write++)] = data;
+}
+
+short cbuf_shift(struct circbuf *buf) {
+    assert(!cbuf_empty(buf));
+    return buf->data[cbuf_mask(buf, buf->read++)];
+}
+
+
+

source/engine/circbuf.h

@@ -2,22 +2,18 @@
 #define CIRCBUF_H
 
 #include <stdio.h>
+#include <stdint.h>
 
 struct circbuf {
-    void *head;
+    int16_t *data;
-    void *tail;
+    uint32_t read;
-    void *data;
+    uint32_t write;
-    size_t size;
     int len;
 };
 
 struct circbuf circbuf_init(size_t size, int len);
-void cbuf_append(struct circbuf *buf, void *data, int n);
+void cbuf_push(struct circbuf *buf, short data);
-void *cbuf_take(struct circbuf *buf);
+short cbuf_shift(struct circbuf *buf);
-
-
-
-
 
 
 #endif

source/engine/datastream.c

@@ -31,7 +31,6 @@ static void render_frame(plm_t * mpeg, plm_frame_t * frame, void *user)
 static void render_audio(plm_t * mpeg, plm_samples_t * samples, void *user)
 {
     struct datastream *ds = user;
-    int size = sizeof(float) * samples->count * 2;
     play_raw(ds->audio_device, samples->interleaved, samples->count * 2);
 }
 
@@ -71,7 +70,7 @@ void ds_openvideo(struct datastream *ds, const char *video, const char *adriver)
     plm_set_audio_stream(ds->plm, 0);
 
     // Adjust the audio lead time according to the audio_spec buffer size
-    //plm_set_audio_lead_time(ds->plm, 4096/48000);
+    plm_set_audio_lead_time(ds->plm, 4096/48000);
 
     ds->playing = true;
 }

source/engine/sound.c

@@ -15,53 +15,60 @@
 
 #include "circbuf.h"
 
-//ma_engine engine;
 
 const char *audioDriver;
 
 struct sound *mus_cur;
-//ma_sound_group mus_grp;
 
-typedef struct
+#define BUSFRAMES 15000
-{
-    float left_phase;
-    float right_phase;
-} paTestData;
 
 struct circbuf vidbuf;
 
-short HalfSecond[22400];
-short *shorthead;
-
-
-   unsigned int ch;
-    unsigned int srate;
-    drwav_uint64 curcmf = 0;
-    drwav_uint64 totalpcmf;
-    float *psamps;
-
         drmp3 mp3;
 
- float inbuf[4096*2];
+struct wav mwav;
- float filtbuf[3763*2];
+struct sound wavsound;
+
+short *get_sound_frame(struct sound *s, int sr) {
+    s->frame = (s->frame+3) % s->w->frames;
+    return &s->w->data[s->frame];
+}
+
+int vidplaying = 0;
 
 static int patestCallback(const void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo *timeInfo, PaStreamCallbackFlags statusFlags, void *userData)
 {
     /* Cast data passed through stream to our structure. */
     short *out = (short*)outputBuffer;
-
+/*
     int f = 0;
 
     static int interp = 0;
 
     for (int i = 0; i < framesPerBuffer; i++) {
-       short a[2] = {0, 0};
+        *(out++) = *(short*)(mwav.data++);
+        *(out++) = *(short*)(mwav.data++);
+    }
+    */
+/*
+    if (wavsound.play) {
+        for (int i = 0; i < framesPerBuffer; i++) {
+            short *f = get_sound_frame(&wavsound, 48000);
+            out[i*2] += f[0];
+            out[i*2+1] += f[1];
+        }
+    }
+    */
+    if (!vidplaying) return 0;
 
-        a[0] += *(short*)cbuf_take(&vidbuf) * 5;
+    for (int i = 0; i < framesPerBuffer; i++) {
-        a[1] += *(short*)cbuf_take(&vidbuf) * 5;
+       //short a[2] = {0, 0};
 
-        *(out++) = a[0];
+        //a[0] += *(short*)cbuf_shift(&vidbuf) * 5;
-        *(out++) = a[1];
+        //a[1] += *(short*)cbuf_shift(&vidbuf) * 5;
+
+        *(out++) = cbuf_shift(&vidbuf) * 5;
+        *(out++) = cbuf_shift(&vidbuf) * 5;
     }
 
     return 0;
@@ -75,33 +82,29 @@ void check_pa_err(PaError e)
     }
 }
 
-static paTestData data;
 static PaStream *stream_def;
 
+
+
 void sound_init()
 {
-    vidbuf = circbuf_init(sizeof(short), 163864);
+    vidbuf = circbuf_init(sizeof(short), 262144);
 
-    drwav wav;
+    mwav.data = drwav_open_file_and_read_pcm_frames_s16("sounds/alert.wav", &mwav.ch, &mwav.samplerate, &mwav.frames, NULL);
-    if (!drwav_init_file(&wav, "sounds/alert.wav", NULL)) {
-        YughError("Could not open wav.",0);
-    }
 
-    //drwav_int32 *wavdec = malloc(wav.totalPCMFrameCount * wav.channels * sizeof(drwav_int32));
+    printf("Loaded wav: ch %i, sr %i, fr %i.\n", mwav.ch, mwav.samplerate, mwav.frames);
-    //size_t samps = drwav_read_pcm_frames_s32(&wav, wav.totalPCMFrameCount, wavdec);
-
-
-    psamps = drwav_open_file_and_read_pcm_frames_s16("sounds/alert.wav", &ch, &srate, &totalpcmf, NULL);
-
-    printf("WAV is: %i channels, %i samplerate, %l frames.\n", ch, srate, totalpcmf);
 
+    wavsound.w = &mwav;
+    wavsound.loop = 1;
+    wavsound.play = 1;
 
+/*
     if (!drmp3_init_file(&mp3, "sounds/circus.mp3", NULL)) {
         YughError("Could not open mp3.",0);
     }
 
     printf("CIrcus mp3 channels: %ui, samplerate: %ui\n", mp3.channels, mp3.sampleRate);
-
+*/
 
         PaError err = Pa_Initialize();
     check_pa_err(err);
@@ -112,7 +115,7 @@ void sound_init()
     for (int i = 0; i < numDevices; i++) {
         deviceInfo = Pa_GetDeviceInfo(i);
 
-        printf("Device %i: channels %i, sample rate %f, name %s\n", i, deviceInfo->maxOutputChannels, deviceInfo->defaultSampleRate, deviceInfo->name);
+       // printf("Device %i: channels %i, sample rate %f, name %s\n", i, deviceInfo->maxOutputChannels, deviceInfo->defaultSampleRate, deviceInfo->name);
     }
 
     PaStreamParameters outparams;
@@ -127,54 +130,14 @@ void sound_init()
     */
 
     //err = Pa_OpenStream(&stream_def, NULL, &outparams, 48000, 4096, paNoFlag, patestCallback, &data);
-    err = Pa_OpenDefaultStream(&stream_def, 0, 2, paInt16, 48000, 4096, patestCallback, NULL);
+    err = Pa_OpenDefaultStream(&stream_def, 0, 2, paInt16, 48000, 256, patestCallback, NULL);
     check_pa_err(err);
 
     err = Pa_StartStream(stream_def);
     check_pa_err(err);
 
-    //Pa_Sleep(1000);
-
-    //check_pa_err(Pa_StopStream(stream));
 
 
-
-/*
-
-    ma_result result;
-    ma_device device;
-    ma_device_config cnf;
-
-    cnf = ma_device_config_init(ma_device_type_playback);
-    cnf.playback.format = ma_format_f32;
-    cnf.playback.channels = 2;
-    cnf.sampleRate = 48000;
-    cnf.dataCallback = data_callback;
-
-    result = ma_device_init(NULL, &cnf, &device);
-    if (result != MA_SUCCESS) {
-        YughError("Did not initialize audio playback!!",0);
-    }
-
-
-    result = ma_device_start(&device);
-   if (result != MA_SUCCESS) {
-       printf("Failed to start playback device.\n");
-   }
-*/
-
-/*
-    ma_engine_config enginecnf = ma_engine_config_init();
-    enginecnf.pDevice = &device;
-
-    ma_result result = ma_engine_init(&enginecnf, &engine);
-    if (result != MA_SUCCESS) {
-        YughError("Miniaudio did not start properly.",1);
-        exit(1);
-    }
-
-    ma_sound_group_init(&engine, 0, NULL, &mus_grp);
-*/
 }
 
 void audio_open(const char *device)
@@ -271,12 +234,15 @@ void audio_init()
 
 void play_raw(int device, void *data, int size)
 {
+
     float *d = data;
-    short t[size];
+    short t;
     for (int i = 0; i < size; i++) {
-        t[i] = d[i]*32767;
+        t = (short)(d[i]*32767);
+        cbuf_push(&vidbuf, t);
     }
-    cbuf_append(&vidbuf, t, size);
+
+    vidplaying = 1;
     /*
     for (int i = 0; i < size; i++) {
         short temp = (short)(d[i] * 32767);

source/engine/sound.h

@@ -17,10 +17,23 @@ enum MUS {
 
 struct sound {
     int sound;
+    int loop;
+    int mono;
+    int fin;
+    int frame;
+    int play;
+    struct wav *w;
     enum MUS state;
     unsigned char volume;
 };
 
+struct wav {
+    int ch;
+    int samplerate;
+    int frames;
+    void *data;
+};
+
 extern const char *audioDriver;
 
 void sound_init();