From 89fa345e9ee4778b5f0391b5ab1cfc043aadc1d9 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 22 Apr 2004 22:20:13 +0000
Subject: COmmit missing stuff

git-svn-id: file:///home/lennart/svn/public/vfax/trunk@4 541b366f-4dd8-0310-ae39-b2612fd50714
---
 resample.c | 90 +++++++++++++++++++++++++++++++-------------------------------
 1 file changed, 45 insertions(+), 45 deletions(-)

(limited to 'resample.c')

diff --git a/resample.c b/resample.c
index ee9e540..3ed5c05 100644
--- a/resample.c
+++ b/resample.c
@@ -9,14 +9,6 @@
 
 #define SINC_RADIUS 10
 
-struct resample_state {
-    float delta;
-
-    int sfreq, dfreq;
-    struct interpol_state interpol;
-};
-
-
 static int lcd(int a, int b) {
     assert(a >= 1 && b >= 1);
 
@@ -44,13 +36,13 @@ void resample_done(struct resample_state *s) {
     interpol_done(&s->interpol);
 }
 
-void resample_get(struct resample_state *s, float* sp, int *sl, float *dp, int *dl, int sfreq, int dfreq) {
+void resample_get(struct resample_state *s, struct qbuf *sq, struct qbuf *dq, int sfreq, int dfreq) {
     int di;
     float x = 0;
-
-    assert(s && sp && dp && sfreq > 0 && dfreq > 0);
-    assert(*sl > 0);
-    assert(*dl > 0);
+    float *sp, *dp;
+    size_t sl, dl;
+    
+    assert(s && sq && dq && sfreq > 0 && dfreq > 0);
 
     if (sfreq != s->sfreq || dfreq != s->dfreq) {
         interpol_done(&s->interpol);
@@ -59,38 +51,50 @@ void resample_get(struct resample_state *s, float* sp, int *sl, float *dp, int *
         s->dfreq = dfreq;
     }
 
+    sp = qbuf_pull(sq, &sl);
+    dp = qbuf_push(dq, &dl);
+
+    assert(sp && dp && sl && dl);
+
+    sl /= sizeof(float);
+    dl /= sizeof(float);
+    
     di = 0;
-    while (di < *dl) {
+    while (di < dl) {
         x = (float) di*sfreq/dfreq + s->delta;
 
-        if (x + SINC_RADIUS + 1 > *sl)
+        if (x + SINC_RADIUS + 1 > sl)
             break;
         
-        *(dp++) = interpol_get(&s->interpol, sp, *sl, x);
+        *(dp++) = interpol_get(&s->interpol, sp, sl, x);
         di++;
     }
     
-    *dl = di;
+    qbuf_push_validate(dq, di*sizeof(float));
 
     if (x >= SINC_RADIUS) {
-        *sl = (int) (x - SINC_RADIUS);
-        s->delta = x - *sl;
-    } else
-        *sl = 0;
+        int rn;
+        rn = (int) (x - SINC_RADIUS);
+        assert(rn <= sl);
+        s->delta = x - rn;
+        fprintf(stderr, "foo\n");
+        qbuf_pull_invalidate(sq, rn*sizeof(float));
+        fprintf(stderr, "bar\n");
+    }
 }
 
 #if (TEST == 7)
 
 #define BUFSIZE (10*1024)
 
-void sinbuf(float *buf, int l) {
+static void sinbuf(float *buf, int l) {
     static int i = 0;
 
     for (; l > 0; l--, i = (i+1 == 100) ? 0 : i+1)
         *(buf++) = sin(i*2*M_PI/100);
 }
 
-void convbuf(float *buf, int l) {
+static void convbuf(float *buf, int l) {
     int16_t *p = (int16_t*) buf;
     for (; l > 0; l--, p+=2) {
         float v = ((float) *p + (float) *(p+1))/0x7FFF;
@@ -102,44 +106,40 @@ void convbuf(float *buf, int l) {
 
 int main(int argc, char *argv[]) {
     struct resample_state resample;
-    float inbuf[BUFSIZE];
-    int total_n_inbuf = 0;
-
+    struct qbuf qi, qo;
+    
     if (argc > 1) {
         stdin = fopen(argv[1], "r");
         assert(stdin);
     }
 
+    qbuf_init(&qi, BUFSIZE);
+    qbuf_init(&qo, BUFSIZE);
     resample_init(&resample);
     
     while (!feof(stdin)) {
-        float outbuf[BUFSIZE];
-        int n_outbuf = sizeof(outbuf) / sizeof(float);
-        int n_inbuf, c;
-
+        int c;
+        float *ip, *up;
+        size_t il, ol;
+        
         fprintf(stderr, "LOOP!\n");
 
-        c = fread(inbuf + total_n_inbuf, sizeof(float), sizeof(inbuf)/sizeof(float) - total_n_inbuf, stdin);
-        convbuf(inbuf + total_n_inbuf, c);
-        n_inbuf = (total_n_inbuf += c);
-
+        ip = qbuf_push(&qi, &il);
         
-        
-/*          sinbuf(inbuf + total_n_inbuf, sizeof(inbuf)/sizeof(float) - total_n_inbuf); */
-/*          n_inbuf = total_n_inbuf = sizeof(inbuf)/sizeof(float); *\/ */
-
+        c = fread(ip, sizeof(float), il/sizeof(float), stdin);
+        convbuf(ip, c);
+        qbuf_push_validate(&qi, c*sizeof(float));
 
-        resample_get(&resample, inbuf, &n_inbuf, outbuf, &n_outbuf, 44100, 8000);
-        
-        fwrite(outbuf, sizeof(float), n_outbuf, stdout);
+        resample_get(&resample, &qi, &qo, 44100, 8000);
 
-        if (n_inbuf) {
-            total_n_inbuf -= n_inbuf;
-            memmove(inbuf, inbuf + n_inbuf, total_n_inbuf*sizeof(float));
-        }
+        up = qbuf_pull(&qo, &ol);
+        fwrite(up, sizeof(float), ol/sizeof(float), stdout);
+        qbuf_pull_invalidate(&qo, ol);
     }
 
     resample_done(&resample);
+    qbuf_done(&qi);
+    qbuf_done(&qo);
     
     return 0;
 }
-- 
cgit