early-access version 1255

externals/cubeb/test/test_audio.cpp

@@ -0,0 +1,244 @@
+/*
+ * 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. */
+#include "gtest/gtest.h"
+#if !defined(_XOPEN_SOURCE)
+#define _XOPEN_SOURCE 600
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <memory>
+#include <string.h>
+#include "cubeb/cubeb.h"
+#include <string>
+
+//#define ENABLE_NORMAL_LOG
+//#define ENABLE_VERBOSE_LOG
+#include "common.h"
+
+using namespace std;
+
+#define MAX_NUM_CHANNELS 32
+
+#if !defined(M_PI)
+#define M_PI 3.14159265358979323846
+#endif
+
+#define VOLUME 0.2
+
+float get_frequency(int channel_index)
+{
+  return 220.0f * (channel_index+1);
+}
+
+template<typename T> T ConvertSample(double input);
+template<> float ConvertSample(double input) { return input; }
+template<> short ConvertSample(double input) { return short(input * 32767.0f); }
+
+/* store the phase of the generated waveform */
+struct synth_state {
+  synth_state(int num_channels_, float sample_rate_)
+    : num_channels(num_channels_),
+    sample_rate(sample_rate_)
+  {
+    for(int i=0;i < MAX_NUM_CHANNELS;++i)
+      phase[i] = 0.0f;
+  }
+
+  template<typename T>
+    void run(T* audiobuffer, long nframes)
+    {
+      for(int c=0;c < num_channels;++c) {
+        float freq = get_frequency(c);
+        float phase_inc = 2.0 * M_PI * freq / sample_rate;
+        for(long n=0;n < nframes;++n) {
+          audiobuffer[n*num_channels+c] = ConvertSample<T>(sin(phase[c]) * VOLUME);
+          phase[c] += phase_inc;
+        }
+      }
+    }
+
+private:
+  int num_channels;
+  float phase[MAX_NUM_CHANNELS];
+  float sample_rate;
+};
+
+template<typename T>
+long data_cb(cubeb_stream * /*stream*/, void * user, const void * /*inputbuffer*/, void * outputbuffer, long nframes)
+{
+  synth_state *synth = (synth_state *)user;
+  synth->run((T*)outputbuffer, nframes);
+  return nframes;
+}
+
+void state_cb_audio(cubeb_stream * /*stream*/, void * /*user*/, cubeb_state /*state*/)
+{
+}
+
+/* Our android backends don't support float, only int16. */
+int supports_float32(string backend_id)
+{
+  return backend_id != "opensl"
+    && backend_id != "audiotrack";
+}
+
+/* Some backends don't have code to deal with more than mono or stereo. */
+int supports_channel_count(string backend_id, int nchannels)
+{
+  return nchannels <= 2 ||
+    (backend_id != "opensl" && backend_id != "audiotrack");
+}
+
+int run_test(int num_channels, int sampling_rate, int is_float)
+{
+  int r = CUBEB_OK;
+
+  cubeb *ctx = NULL;
+
+  r = common_init(&ctx, "Cubeb audio test: channels");
+  if (r != CUBEB_OK) {
+    fprintf(stderr, "Error initializing cubeb library\n");
+    return r;
+  }
+  std::unique_ptr<cubeb, decltype(&cubeb_destroy)>
+    cleanup_cubeb_at_exit(ctx, cubeb_destroy);
+
+  const char * 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. */
+    return CUBEB_OK;
+  }
+
+  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;
+  params.layout = CUBEB_LAYOUT_UNDEFINED;
+  params.prefs = CUBEB_STREAM_PREF_NONE;
+
+  synth_state synth(params.channels, params.rate);
+
+  cubeb_stream *stream = NULL;
+  r = cubeb_stream_init(ctx, &stream, "test tone", NULL, NULL, NULL, &params,
+      4096, is_float ? &data_cb<float> : &data_cb<short>, state_cb_audio, &synth);
+  if (r != CUBEB_OK) {
+    fprintf(stderr, "Error initializing cubeb stream: %d\n", r);
+    return r;
+  }
+
+  std::unique_ptr<cubeb_stream, decltype(&cubeb_stream_destroy)>
+    cleanup_stream_at_exit(stream, cubeb_stream_destroy);
+
+  cubeb_stream_start(stream);
+  delay(200);
+  cubeb_stream_stop(stream);
+
+  return r;
+}
+
+int run_volume_test(int is_float)
+{
+  int r = CUBEB_OK;
+
+  cubeb *ctx = NULL;
+
+  r = common_init(&ctx, "Cubeb audio test");
+  if (r != CUBEB_OK) {
+    fprintf(stderr, "Error initializing cubeb library\n");
+    return r;
+  }
+
+  std::unique_ptr<cubeb, decltype(&cubeb_destroy)>
+    cleanup_cubeb_at_exit(ctx, cubeb_destroy);
+
+  const char * backend_id = cubeb_get_backend_id(ctx);
+
+  if ((is_float && !supports_float32(backend_id))) {
+    /* don't treat this as a test failure. */
+    return CUBEB_OK;
+  }
+
+  cubeb_stream_params params;
+  params.format = is_float ? CUBEB_SAMPLE_FLOAT32NE : CUBEB_SAMPLE_S16NE;
+  params.rate = 44100;
+  params.channels = 2;
+  params.layout = CUBEB_LAYOUT_STEREO;
+  params.prefs = CUBEB_STREAM_PREF_NONE;
+
+  synth_state synth(params.channels, params.rate);
+
+  cubeb_stream *stream = NULL;
+  r = cubeb_stream_init(ctx, &stream, "test tone", NULL, NULL, NULL, &params,
+      4096, is_float ? &data_cb<float> : &data_cb<short>,
+      state_cb_audio, &synth);
+  if (r != CUBEB_OK) {
+    fprintf(stderr, "Error initializing cubeb stream: %d\n", r);
+    return r;
+  }
+
+  std::unique_ptr<cubeb_stream, decltype(&cubeb_stream_destroy)>
+    cleanup_stream_at_exit(stream, cubeb_stream_destroy);
+
+  fprintf(stderr, "Testing: volume\n");
+  for(int i=0;i <= 4; ++i)
+  {
+    fprintf(stderr, "Volume: %d%%\n", i*25);
+
+    cubeb_stream_set_volume(stream, i/4.0f);
+    cubeb_stream_start(stream);
+    delay(400);
+    cubeb_stream_stop(stream);
+    delay(100);
+  }
+
+  return r;
+}
+
+TEST(cubeb, run_volume_test_short)
+{
+  ASSERT_EQ(run_volume_test(0), CUBEB_OK);
+}
+
+TEST(cubeb, run_volume_test_float)
+{
+  ASSERT_EQ(run_volume_test(1), CUBEB_OK);
+}
+
+TEST(cubeb, run_channel_rate_test)
+{
+  unsigned int channel_values[] = {
+    1,
+    2,
+    3,
+    4,
+    6,
+  };
+
+  int freq_values[] = {
+    16000,
+    24000,
+    44100,
+    48000,
+  };
+
+  for(auto channels : channel_values) {
+    for(auto freq : freq_values) {
+      ASSERT_TRUE(channels < MAX_NUM_CHANNELS);
+      fprintf(stderr, "--------------------------\n");
+      ASSERT_EQ(run_test(channels, freq, 0), CUBEB_OK);
+      ASSERT_EQ(run_test(channels, freq, 1), CUBEB_OK);
+    }
+  }
+}