The Tor Browser: comparison media/libcubeb/tests/test

--1:000000000000
+:29f124043481
+/*
+* Copyright © 2013 Sebastien Alaiwan <sebastien.alaiwan@gmail.com>
+*
+* This program is made available under an ISC-style license.  See the
+* accompanying file LICENSE for details.
+*/
+/* libcubeb api/function exhaustive test. Plays a series of tones in different
+* conditions. */
+#ifdef NDEBUG
+#undef NDEBUG
+#endif
+#define _XOPEN_SOURCE 500
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <assert.h>
+#include <string.h>
+#include "cubeb/cubeb.h"
+#include "common.h"
+#define MAX_NUM_CHANNELS 32
+#if !defined(M_PI)
+#define M_PI 3.14159265358979323846
+#endif
+#define NELEMS(x) ((int) (sizeof(x) / sizeof(x[0])))
+#define VOLUME 0.2
+float get_frequency(int channel_index)
+{
+return 220.0f * (channel_index+1);
+}
+/* store the phase of the generated waveform */
+typedef struct {
+int num_channels;
+float phase[MAX_NUM_CHANNELS];
+float sample_rate;
+} synth_state;
+synth_state* synth_create(int num_channels, float sample_rate)
+{
+synth_state* synth = (synth_state *) malloc(sizeof(synth_state));
+for(int i=0;i < MAX_NUM_CHANNELS;++i)
+synth->phase[i] = 0.0f;
+synth->num_channels = num_channels;
+synth->sample_rate = sample_rate;
+return synth;
+}
+void synth_destroy(synth_state* synth)
+{
+free(synth);
+}
+void synth_run_float(synth_state* synth, float* audiobuffer, long nframes)
+{
+for(int c=0;c < synth->num_channels;++c) {
+float freq = get_frequency(c);
+float phase_inc = 2.0 * M_PI * freq / synth->sample_rate;
+for(long n=0;n < nframes;++n) {
+audiobuffer[n*synth->num_channels+c] = sin(synth->phase[c]) * VOLUME;
+synth->phase[c] += phase_inc;
+}
+}
+}
+long data_cb_float(cubeb_stream *stream, void *user, void *buffer, long nframes)
+{
+synth_state *synth = (synth_state *)user;
+synth_run_float(synth, (float*)buffer, nframes);
+return nframes;
+}
+void synth_run_16bit(synth_state* synth, short* audiobuffer, long nframes)
+{
+for(int c=0;c < synth->num_channels;++c) {
+float freq = get_frequency(c);
+float phase_inc = 2.0 * M_PI * freq / synth->sample_rate;
+for(long n=0;n < nframes;++n) {
+audiobuffer[n*synth->num_channels+c] = sin(synth->phase[c]) * VOLUME * 32767.0f;
+synth->phase[c] += phase_inc;
+}
+}
+}
+long data_cb_short(cubeb_stream *stream, void *user, void *buffer, long nframes)
+{
+synth_state *synth = (synth_state *)user;
+synth_run_16bit(synth, (short*)buffer, nframes);
+return nframes;
+}
+void state_cb(cubeb_stream *stream, void *user, cubeb_state state)
+{
+}
+/* Our android backends don't support float, only int16. */
+int supports_float32(const char* backend_id)
+{
+return (strcmp(backend_id, "opensl") != 0 &&
+strcmp(backend_id, "audiotrack") != 0);
+}
+/* Some backends don't have code to deal with more than mono or stereo. */
+int supports_channel_count(const char* backend_id, int nchannels)
+{
+return nchannels <= 2 ||
+(strcmp(backend_id, "opensl") != 0 && strcmp(backend_id, "audiotrack") != 0);
+}
+int run_test(int num_channels, int sampling_rate, int is_float)
+{
+int ret = CUBEB_OK;
+cubeb *ctx = NULL;
+synth_state* synth = NULL;
+cubeb_stream *stream = NULL;
+const char * backend_id = NULL;
+ret = cubeb_init(&ctx, "Cubeb audio test");
+if (ret != CUBEB_OK) {
+fprintf(stderr, "Error initializing cubeb library\n");
+goto cleanup;
+}
+backend_id = cubeb_get_backend_id(ctx);
+if ((is_float && !supports_float32(backend_id)) ||
+!supports_channel_count(backend_id, num_channels)) {
+/* don't treat this as a test failure. */
+goto cleanup;
+}
+fprintf(stderr, "Testing %d channel(s), %d Hz, %s (%s)\n", num_channels, sampling_rate, is_float ? "float" : "short", cubeb_get_backend_id(ctx));
+cubeb_stream_params params;
+params.format = is_float ? CUBEB_SAMPLE_FLOAT32NE : CUBEB_SAMPLE_S16NE;
+params.rate = sampling_rate;
+params.channels = num_channels;
+synth = synth_create(params.channels, params.rate);
+if (synth == NULL) {
+fprintf(stderr, "Out of memory\n");
+goto cleanup;
+}
+ret = cubeb_stream_init(ctx, &stream, "test tone", params,
+100, is_float ? data_cb_float : data_cb_short, state_cb, synth);
+if (ret != CUBEB_OK) {
+fprintf(stderr, "Error initializing cubeb stream: %d\n", ret);
+goto cleanup;
+}
+cubeb_stream_start(stream);
+delay(200);
+cubeb_stream_stop(stream);
+cleanup:
+cubeb_stream_destroy(stream);
+cubeb_destroy(ctx);
+synth_destroy(synth);
+return ret;
+}
+int main(int argc, char *argv[])
+{
+int channel_values[] = {
+1,
+2,
+3,
+4,
+6,
+};
+int freq_values[] = {
+16000,
+24000,
+44100,
+48000,
+};
+for(int j = 0; j < NELEMS(channel_values); ++j) {
+for(int i = 0; i < NELEMS(freq_values); ++i) {
+assert(channel_values[j] < MAX_NUM_CHANNELS);
+fprintf(stderr, "--------------------------\n");
+assert(run_test(channel_values[j], freq_values[i], 0) == CUBEB_OK);
+assert(run_test(channel_values[j], freq_values[i], 1) == CUBEB_OK);
+}
+}
+return CUBEB_OK;
+}

The Tor Browser / file comparison

comparison: media/libcubeb/tests/test_audio.cpp

media/libcubeb/tests/test_audio.cpp