The Tor Browser: media/libcubeb/tests/test_audio.cpp@b8a032363ba2 (annotated)

media/libcubeb/tests/test_audio.cpp@b8a032363ba2 (annotated)

media/libcubeb/tests/test_audio.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
  * 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,
 , 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[] = {
 ,
 ,
 ,
 ,
 ,
   };
   int freq_values[] = {
 ,
 ,
 ,
 ,
   };
   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;
 }

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media/libcubeb/tests/test_audio.cpp@b8a032363ba2 (annotated)

media/libcubeb/tests/test_audio.cpp