152 lines
3.5 KiB
C++
152 lines
3.5 KiB
C++
/*
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* Copyright © 2016 Mozilla Foundation
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*
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* This program is made available under an ISC-style license. See the
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* accompanying file LICENSE for details.
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*/
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/* libcubeb api/function test. Loops input back to output and check audio
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* is flowing. */
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#ifdef NDEBUG
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#undef NDEBUG
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#endif
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#define _XOPEN_SOURCE 600
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <assert.h>
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#include "cubeb/cubeb.h"
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#include "common.h"
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#ifdef CUBEB_GECKO_BUILD
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#include "TestHarness.h"
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#endif
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#define SAMPLE_FREQUENCY 48000
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#if (defined(_WIN32) || defined(__WIN32__))
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#define STREAM_FORMAT CUBEB_SAMPLE_FLOAT32LE
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#define SILENT_SAMPLE 0.0f
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#else
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#define STREAM_FORMAT CUBEB_SAMPLE_S16LE
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#define SILENT_SAMPLE 0
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#endif
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struct user_state
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{
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bool seen_noise;
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};
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long data_cb(cubeb_stream * stream, void * user, const void * inputbuffer, void * outputbuffer, long nframes)
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{
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user_state * u = reinterpret_cast<user_state*>(user);
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#if (defined(_WIN32) || defined(__WIN32__))
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float *ib = (float *)inputbuffer;
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float *ob = (float *)outputbuffer;
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#else
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short *ib = (short *)inputbuffer;
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short *ob = (short *)outputbuffer;
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#endif
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bool seen_noise = false;
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if (stream == NULL || inputbuffer == NULL || outputbuffer == NULL) {
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return CUBEB_ERROR;
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}
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// Loop back: upmix the single input channel to the two output channels,
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// checking if there is noise in the process.
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long output_index = 0;
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for (long i = 0; i < nframes; i++) {
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if (ib[i] != SILENT_SAMPLE) {
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seen_noise = true;
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}
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ob[output_index] = ob[output_index + 1] = ib[i];
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output_index += 2;
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}
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u->seen_noise |= seen_noise;
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return nframes;
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}
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void state_cb(cubeb_stream * stream, void * /*user*/, cubeb_state state)
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{
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if (stream == NULL)
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return;
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switch (state) {
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case CUBEB_STATE_STARTED:
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printf("stream started\n"); break;
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case CUBEB_STATE_STOPPED:
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printf("stream stopped\n"); break;
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case CUBEB_STATE_DRAINED:
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printf("stream drained\n"); break;
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default:
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printf("unknown stream state %d\n", state);
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}
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return;
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}
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int main(int /*argc*/, char * /*argv*/[])
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{
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#ifdef CUBEB_GECKO_BUILD
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ScopedXPCOM xpcom("test_duplex");
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#endif
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cubeb *ctx;
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cubeb_stream *stream;
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cubeb_stream_params input_params;
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cubeb_stream_params output_params;
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int r;
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user_state stream_state = { false };
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uint32_t latency_frames = 0;
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r = cubeb_init(&ctx, "Cubeb duplex example");
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if (r != CUBEB_OK) {
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fprintf(stderr, "Error initializing cubeb library\n");
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return r;
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}
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/* This test needs an available input device, skip it if this host does not
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* have one. */
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if (!has_available_input_device(ctx)) {
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return 0;
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}
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/* typical user-case: mono input, stereo output, low latency. */
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input_params.format = STREAM_FORMAT;
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input_params.rate = 48000;
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input_params.channels = 1;
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output_params.format = STREAM_FORMAT;
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output_params.rate = 48000;
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output_params.channels = 2;
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r = cubeb_get_min_latency(ctx, output_params, &latency_frames);
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if (r != CUBEB_OK) {
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fprintf(stderr, "Could not get minimal latency\n");
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return r;
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}
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r = cubeb_stream_init(ctx, &stream, "Cubeb duplex",
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NULL, &input_params, NULL, &output_params,
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latency_frames, data_cb, state_cb, &stream_state);
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if (r != CUBEB_OK) {
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fprintf(stderr, "Error initializing cubeb stream\n");
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return r;
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}
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cubeb_stream_start(stream);
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delay(500);
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cubeb_stream_stop(stream);
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cubeb_stream_destroy(stream);
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cubeb_destroy(ctx);
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assert(stream_state.seen_noise);
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return CUBEB_OK;
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}
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