mirror of
https://github.com/Ryujinx/libsoundio.git
synced 2025-01-03 20:35:33 +00:00
322 lines
11 KiB
C
322 lines
11 KiB
C
/*
|
|
* Copyright (c) 2015 Andrew Kelley
|
|
*
|
|
* This file is part of libsoundio, which is MIT licensed.
|
|
* See http://opensource.org/licenses/MIT
|
|
*/
|
|
|
|
#include <soundio/soundio.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
|
|
__attribute__ ((cold))
|
|
__attribute__ ((noreturn))
|
|
__attribute__ ((format (printf, 1, 2)))
|
|
static void panic(const char *format, ...) {
|
|
va_list ap;
|
|
va_start(ap, format);
|
|
vfprintf(stderr, format, ap);
|
|
fprintf(stderr, "\n");
|
|
va_end(ap);
|
|
abort();
|
|
}
|
|
|
|
static int min_int(int a, int b) {
|
|
return (a < b) ? a : b;
|
|
}
|
|
|
|
static void error_callback(struct SoundIoStream *stream, int err) {
|
|
panic("stream aborted: %s", soundio_strerror(err));
|
|
}
|
|
|
|
static void audio_callback(struct SoundIoStream *stream, int frame_count_min, int frame_count_max) {
|
|
struct SoundIoChannelArea *in_areas;
|
|
struct SoundIoChannelArea *out_areas;
|
|
int err;
|
|
|
|
int frames_left = frame_count_max;
|
|
|
|
int read_frame_count = -1;
|
|
|
|
while (frames_left > 0) {
|
|
int write_frame_count = frames_left;
|
|
|
|
if ((err = soundio_stream_begin_write(stream, &out_areas, &write_frame_count)))
|
|
panic("begin read error: %s", soundio_strerror(err));
|
|
|
|
if (!write_frame_count)
|
|
break;
|
|
|
|
for (int frame = 0; frame < write_frame_count; frame += 1, read_frame_count -= 1) {
|
|
if (read_frame_count == 0) {
|
|
if ((err = soundio_stream_end_read(stream)))
|
|
panic("begin read error: %s", soundio_strerror(err));
|
|
}
|
|
if (read_frame_count <= 0) {
|
|
if ((err = soundio_stream_begin_read(stream, &in_areas, &read_frame_count)))
|
|
panic("begin read error: %s", soundio_strerror(err));
|
|
}
|
|
for (int ch = 0; ch < stream->output_layout.channel_count; ch += 1) {
|
|
|
|
memcpy(write_ptr, areas[ch].ptr, stream->bytes_per_sample);
|
|
out_areas[ch].ptr += out_areas[ch].step;
|
|
write_ptr += instream->bytes_per_sample;
|
|
}
|
|
}
|
|
|
|
|
|
if (!areas) {
|
|
// Due to an overflow there is a hole. Fill the ring buffer with
|
|
// silence for the size of the hole.
|
|
memset(write_ptr, 0, frame_count * instream->bytes_per_frame);
|
|
fprintf(stderr, "Dropped %d frames due to internal overflow\n", frame_count);
|
|
} else {
|
|
for (int frame = 0; frame < frame_count; frame += 1) {
|
|
for (int ch = 0; ch < instream->layout.channel_count; ch += 1) {
|
|
memcpy(write_ptr, areas[ch].ptr, instream->bytes_per_sample);
|
|
areas[ch].ptr += areas[ch].step;
|
|
write_ptr += instream->bytes_per_sample;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((err = soundio_instream_end_read(instream)))
|
|
panic("end read error: %s", soundio_strerror(err));
|
|
|
|
frames_left -= frame_count;
|
|
if (frames_left <= 0)
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void write_callback(struct SoundIoOutStream *outstream, int frame_count_min, int frame_count_max) {
|
|
struct SoundIoChannelArea *areas;
|
|
int frame_count;
|
|
int err;
|
|
|
|
char *read_ptr = soundio_ring_buffer_read_ptr(ring_buffer);
|
|
int fill_bytes = soundio_ring_buffer_fill_count(ring_buffer);
|
|
int fill_count = fill_bytes / outstream->bytes_per_frame;
|
|
|
|
if (frame_count_min > fill_count) {
|
|
// Ring buffer does not have enough data, fill with zeroes.
|
|
for (;;) {
|
|
if ((err = soundio_outstream_begin_write(outstream, &areas, &frame_count)))
|
|
panic("begin write error: %s", soundio_strerror(err));
|
|
if (frame_count <= 0)
|
|
return;
|
|
for (int frame = 0; frame < frame_count; frame += 1) {
|
|
for (int ch = 0; ch < outstream->layout.channel_count; ch += 1) {
|
|
memset(areas[ch].ptr, 0, outstream->bytes_per_sample);
|
|
areas[ch].ptr += areas[ch].step;
|
|
}
|
|
}
|
|
if ((err = soundio_outstream_end_write(outstream)))
|
|
panic("end write error: %s", soundio_strerror(err));
|
|
}
|
|
}
|
|
|
|
int read_count = min_int(frame_count_max, fill_count);
|
|
int frames_left = read_count;
|
|
|
|
while (frames_left > 0) {
|
|
int frame_count = frames_left;
|
|
|
|
if ((err = soundio_outstream_begin_write(outstream, &areas, &frame_count)))
|
|
panic("begin write error: %s", soundio_strerror(err));
|
|
|
|
if (frame_count <= 0)
|
|
break;
|
|
|
|
for (int frame = 0; frame < frame_count; frame += 1) {
|
|
for (int ch = 0; ch < outstream->layout.channel_count; ch += 1) {
|
|
memcpy(areas[ch].ptr, read_ptr, outstream->bytes_per_sample);
|
|
areas[ch].ptr += areas[ch].step;
|
|
read_ptr += outstream->bytes_per_sample;
|
|
}
|
|
}
|
|
|
|
if ((err = soundio_outstream_end_write(outstream)))
|
|
panic("end write error: %s", soundio_strerror(err));
|
|
|
|
frames_left -= frame_count;
|
|
}
|
|
|
|
soundio_ring_buffer_advance_read_ptr(ring_buffer, read_count * outstream->bytes_per_frame);
|
|
}
|
|
|
|
static void underflow_callback(struct SoundIoStream *stream) {
|
|
static int count = 0;
|
|
fprintf(stderr, "underflow %d\n", ++count);
|
|
}
|
|
|
|
static void overflow_callback(struct SoundIoStream *stream) {
|
|
static int count = 0;
|
|
fprintf(stderr, "overflow %d\n", ++count);
|
|
}
|
|
|
|
static int usage(char *exe) {
|
|
fprintf(stderr, "Usage: %s [options]\n"
|
|
"Options:\n"
|
|
" [--backend dummy|alsa|pulseaudio|jack|coreaudio|wasapi]\n"
|
|
" [--device id]\n"
|
|
" [--raw]\n"
|
|
" [--latency seconds]\n"
|
|
, exe);
|
|
return 1;
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
char *exe = argv[0];
|
|
enum SoundIoBackend backend = SoundIoBackendNone;
|
|
char *device_id = NULL;
|
|
bool raw = false;
|
|
|
|
double microphone_latency = 0.2; // seconds
|
|
|
|
for (int i = 1; i < argc; i += 1) {
|
|
char *arg = argv[i];
|
|
if (arg[0] == '-' && arg[1] == '-') {
|
|
if (strcmp(arg, "--raw") == 0) {
|
|
raw = true;
|
|
} else if (++i >= argc) {
|
|
return usage(exe);
|
|
} else if (strcmp(arg, "--backend") == 0) {
|
|
if (strcmp("dummy", argv[i]) == 0) {
|
|
backend = SoundIoBackendDummy;
|
|
} else if (strcmp("alsa", argv[i]) == 0) {
|
|
backend = SoundIoBackendAlsa;
|
|
} else if (strcmp("pulseaudio", argv[i]) == 0) {
|
|
backend = SoundIoBackendPulseAudio;
|
|
} else if (strcmp("jack", argv[i]) == 0) {
|
|
backend = SoundIoBackendJack;
|
|
} else if (strcmp("coreaudio", argv[i]) == 0) {
|
|
backend = SoundIoBackendCoreAudio;
|
|
} else if (strcmp("wasapi", argv[i]) == 0) {
|
|
backend = SoundIoBackendWasapi;
|
|
} else {
|
|
fprintf(stderr, "Invalid backend: %s\n", argv[i]);
|
|
return 1;
|
|
}
|
|
} else if (strcmp(arg, "--device") == 0) {
|
|
device_id = argv[i];
|
|
} else if (strcmp(arg, "--latency") == 0) {
|
|
microphone_latency = atof(argv[i]);
|
|
} else {
|
|
return usage(exe);
|
|
}
|
|
} else {
|
|
return usage(exe);
|
|
}
|
|
}
|
|
struct SoundIo *soundio = soundio_create();
|
|
if (!soundio)
|
|
panic("out of memory");
|
|
|
|
int err = (backend == SoundIoBackendNone) ?
|
|
soundio_connect(soundio) : soundio_connect_backend(soundio, backend);
|
|
if (err)
|
|
panic("error connecting: %s", soundio_strerror(err));
|
|
|
|
soundio_flush_events(soundio);
|
|
|
|
int default_out_device_index = soundio_default_output_device_index(soundio);
|
|
if (default_out_device_index < 0)
|
|
panic("no output device found");
|
|
|
|
int default_in_device_index = soundio_default_input_device_index(soundio);
|
|
if (default_in_device_index < 0)
|
|
panic("no output device found");
|
|
|
|
struct SoundIoDevice *in_device;
|
|
|
|
if (device_id) {
|
|
bool found = false;
|
|
for (int i = 0; i < soundio_input_device_count(soundio); i += 1) {
|
|
struct SoundIoDevice *device = soundio_get_input_device(soundio, i);
|
|
if (device->is_raw == raw && strcmp(device->id, device_id) == 0) {
|
|
in_device = device;
|
|
found = true;
|
|
break;
|
|
}
|
|
soundio_device_unref(device);
|
|
}
|
|
if (!found)
|
|
panic("invalid input device id: %s", device_id);
|
|
} else {
|
|
in_device = soundio_get_input_device(soundio, default_in_device_index);
|
|
}
|
|
|
|
struct SoundIoDevice *out_device;
|
|
|
|
bool found = false;
|
|
for (int i = 0; i < soundio_output_device_count(soundio); i += 1) {
|
|
struct SoundIoDevice *device = soundio_get_output_device(soundio, i);
|
|
if (device->is_raw == in_device->is_raw && strcmp(device->id, in_device->id) == 0) {
|
|
out_device = device;
|
|
found = true;
|
|
break;
|
|
}
|
|
soundio_device_unref(device);
|
|
}
|
|
if (!found)
|
|
panic("invalid output device id: %s", in_device->id);
|
|
|
|
|
|
fprintf(stderr, "Input device: %s\n", in_device->name);
|
|
fprintf(stderr, "Output device: %s\n", out_device->name);
|
|
|
|
struct SoundIoStream *stream = soundio_stream_create(in_device, out_device);
|
|
if (!stream)
|
|
panic("out of memory");
|
|
stream->software_latency = microphone_latency;
|
|
stream->audio_callback = audio_callback;
|
|
stream->underflow_callback = underflow_callback;
|
|
stream->overflow_callback = overflow_callback;
|
|
stream->error_callback = error_callback;
|
|
|
|
if ((err = soundio_instream_open(instream))) {
|
|
fprintf(stderr, "unable to open input stream: %s", soundio_strerror(err));
|
|
return 1;
|
|
}
|
|
|
|
struct SoundIoOutStream *outstream = soundio_outstream_create(out_device);
|
|
if (!outstream)
|
|
panic("out of memory");
|
|
outstream->software_latency = microphone_latency;
|
|
|
|
if ((err = soundio_outstream_open(outstream))) {
|
|
fprintf(stderr, "unable to open output stream: %s", soundio_strerror(err));
|
|
return 1;
|
|
}
|
|
|
|
int capacity = microphone_latency * 2 * instream->sample_rate * instream->bytes_per_frame;
|
|
ring_buffer = soundio_ring_buffer_create(soundio, capacity);
|
|
if (!ring_buffer)
|
|
panic("unable to create ring buffer: out of memory");
|
|
char *buf = soundio_ring_buffer_write_ptr(ring_buffer);
|
|
int fill_count = microphone_latency * outstream->sample_rate * outstream->bytes_per_frame;
|
|
memset(buf, 0, fill_count);
|
|
soundio_ring_buffer_advance_write_ptr(ring_buffer, fill_count);
|
|
|
|
if ((err = soundio_instream_start(instream)))
|
|
panic("unable to start input device: %s", soundio_strerror(err));
|
|
|
|
if ((err = soundio_outstream_start(outstream)))
|
|
panic("unable to start output device: %s", soundio_strerror(err));
|
|
|
|
for (;;)
|
|
soundio_wait_events(soundio);
|
|
|
|
soundio_outstream_destroy(outstream);
|
|
soundio_instream_destroy(instream);
|
|
soundio_device_unref(in_device);
|
|
soundio_device_unref(out_device);
|
|
soundio_destroy(soundio);
|
|
return 0;
|
|
}
|