+
+/* Similar to pa_bytes_to_usec() but rounds up, not down */
+
+pa_usec_t pa_bytes_to_usec_round_up(uint64_t length, const pa_sample_spec *spec) {
+ size_t fs;
+ pa_usec_t usec;
+
+ pa_assert(spec);
+
+ fs = pa_frame_size(spec);
+ length = (length + fs - 1) / fs;
+
+ usec = (pa_usec_t) length * PA_USEC_PER_SEC;
+
+ return (usec + spec->rate - 1) / spec->rate;
+}
+
+/* Similar to pa_usec_to_bytes() but rounds up, not down */
+
+size_t pa_usec_to_bytes_round_up(pa_usec_t t, const pa_sample_spec *spec) {
+ uint64_t u;
+ pa_assert(spec);
+
+ u = (uint64_t) t * (uint64_t) spec->rate;
+
+ u = (u + PA_USEC_PER_SEC - 1) / PA_USEC_PER_SEC;
+
+ u *= pa_frame_size(spec);
+
+ return (size_t) u;
+}
+
+void pa_memchunk_dump_to_file(pa_memchunk *c, const char *fn) {
+ FILE *f;
+ void *p;
+
+ pa_assert(c);
+ pa_assert(fn);
+
+ /* Only for debugging purposes */
+
+ f = pa_fopen_cloexec(fn, "a");
+
+ if (!f) {
+ pa_log_warn("Failed to open '%s': %s", fn, pa_cstrerror(errno));
+ return;
+ }
+
+ p = pa_memblock_acquire(c->memblock);
+
+ if (fwrite((uint8_t*) p + c->index, 1, c->length, f) != c->length)
+ pa_log_warn("Failed to write to '%s': %s", fn, pa_cstrerror(errno));
+
+ pa_memblock_release(c->memblock);
+
+ fclose(f);
+}
+
+static void calc_sine(float *f, size_t l, double freq) {
+ size_t i;
+
+ l /= sizeof(float);
+
+ for (i = 0; i < l; i++)
+ *(f++) = (float) 0.5f * sin((double) i*M_PI*2*freq / (double) l);
+}
+
+void pa_memchunk_sine(pa_memchunk *c, pa_mempool *pool, unsigned rate, unsigned freq) {
+ size_t l;
+ unsigned gcd, n;
+ void *p;
+
+ pa_memchunk_reset(c);
+
+ gcd = pa_gcd(rate, freq);
+ n = rate / gcd;
+
+ l = pa_mempool_block_size_max(pool) / sizeof(float);
+
+ l /= n;
+ if (l <= 0) l = 1;
+ l *= n;
+
+ c->length = l * sizeof(float);
+ c->memblock = pa_memblock_new(pool, c->length);
+
+ p = pa_memblock_acquire(c->memblock);
+ calc_sine(p, c->length, freq * l / rate);
+ pa_memblock_release(c->memblock);
+}
+
+size_t pa_convert_size(size_t size, const pa_sample_spec *from, const pa_sample_spec *to) {
+ pa_usec_t usec;
+
+ pa_assert(from);
+ pa_assert(to);
+
+ usec = pa_bytes_to_usec_round_up(size, from);
+ return pa_usec_to_bytes_round_up(usec, to);
+}