ryujinx-backup/libsoundio
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

sio_record: no fwrite in read_callback

Browse source 
See #12
This commit is contained in:
Andrew Kelley 2015-09-04 18:01:57 -07:00
parent b5056f142e
commit 9d3c08fa3f
1 changed files with 55 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

68
example/sio_record.c
View file

@ -12,6 +12,11 @@
#include <string.h>
#include <math.h>
#include <errno.h>
#include <unistd.h>
struct RecordContext {
struct SoundIoRingBuffer *ring_buffer;
};
static enum SoundIoFormat prioritized_formats[] = {
SoundIoFormatFloat32NE,
@ -43,13 +48,26 @@ static int prioritized_sample_rates[] = {
0,
};
static FILE *out_f = NULL;
static int min_int(int a, int b) {
return (a < b) ? a : b;
}
static void read_callback(struct SoundIoInStream *instream, int frame_count_min, int frame_count_max) {
struct RecordContext *rc = instream->userdata;
struct SoundIoChannelArea *areas;
int err;
int frames_left = frame_count_max;
char *write_ptr = soundio_ring_buffer_write_ptr(rc->ring_buffer);
int free_bytes = soundio_ring_buffer_free_count(rc->ring_buffer);
int free_count = free_bytes / instream->bytes_per_frame;
if (free_count < frame_count_min) {
fprintf(stderr, "ring buffer overflow\n");
exit(1);
}
int write_frames = min_int(free_count, frame_count_max);
int frames_left = write_frames;
for (;;) {
int frame_count = frames_left;
@ -63,13 +81,15 @@ static void read_callback(struct SoundIoInStream *instream, int frame_count_min,
break;
if (!areas) {
fprintf(stderr, "hole\n");
exit(1);
// 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);
} else {
for (int frame = 0; frame < frame_count; frame += 1) {
for (int ch = 0; ch < instream->layout.channel_count; ch += 1) {
fwrite(areas[ch].ptr, 1, instream->bytes_per_sample, out_f);
memcpy(write_ptr, areas[ch].ptr, instream->bytes_per_sample);
areas[ch].ptr += areas[ch].step;
write_ptr += instream->bytes_per_sample;
}
}
}
@ -83,6 +103,9 @@ static void read_callback(struct SoundIoInStream *instream, int frame_count_min,
if (frames_left <= 0)
break;
}
int advance_bytes = write_frames * instream->bytes_per_frame;
soundio_ring_buffer_advance_write_ptr(rc->ring_buffer, advance_bytes);
}
static void overflow_callback(struct SoundIoInStream *instream) {
@ -145,6 +168,8 @@ int main(int argc, char **argv) {
if (!outfile)
return usage(exe);
struct RecordContext rc;
struct SoundIo *soundio = soundio_create();
if (!soundio) {
fprintf(stderr, "out of memory\n");
@ -183,7 +208,6 @@ int main(int argc, char **argv) {
fprintf(stderr, "Device: %s\n", selected_device->name);
soundio_device_sort_channel_layouts(selected_device);
struct SoundIoChannelLayout *layout = &selected_device->layouts[0];
int sample_rate = 0;
int *sample_rate_ptr;
@ -207,14 +231,11 @@ int main(int argc, char **argv) {
if (fmt == SoundIoFormatInvalid)
fmt = selected_device->formats[0];
fprintf(stderr, "%s %dHz %s interleaved\n", layout->name, sample_rate, soundio_format_string(fmt));
out_f = fopen(outfile, "wb");
FILE *out_f = fopen(outfile, "wb");
if (!out_f) {
fprintf(stderr, "unable to open %s: %s\n", outfile, strerror(errno));
return 1;
}
struct SoundIoInStream *instream = soundio_instream_create(selected_device);
if (!instream) {
fprintf(stderr, "out of memory\n");
@ -222,22 +243,43 @@ int main(int argc, char **argv) {
}
instream->format = fmt;
instream->sample_rate = sample_rate;
instream->layout = *layout;
instream->read_callback = read_callback;
instream->overflow_callback = overflow_callback;
instream->userdata = &rc;
if ((err = soundio_instream_open(instream))) {
fprintf(stderr, "unable to open input stream: %s", soundio_strerror(err));
return 1;
}
fprintf(stderr, "%s %dHz %s interleaved\n",
instream->layout.name, sample_rate, soundio_format_string(fmt));
const int ring_buffer_duration_seconds = 30;
int capacity = ring_buffer_duration_seconds * instream->sample_rate * instream->bytes_per_frame;
rc.ring_buffer = soundio_ring_buffer_create(soundio, capacity);
if (!rc.ring_buffer) {
fprintf(stderr, "out of memory\n");
return 1;
}
if ((err = soundio_instream_start(instream))) {
fprintf(stderr, "unable to start input device: %s", soundio_strerror(err));
return 1;
}
for (;;)
soundio_wait_events(soundio);
for (;;) {
soundio_flush_events(soundio);
sleep(1);
int fill_bytes = soundio_ring_buffer_fill_count(rc.ring_buffer);
char *read_buf = soundio_ring_buffer_read_ptr(rc.ring_buffer);
size_t amt = fwrite(read_buf, 1, fill_bytes, out_f);
if ((int)amt != fill_bytes) {
fprintf(stderr, "write error: %s\n", strerror(errno));
return 1;
}
soundio_ring_buffer_advance_read_ptr(rc.ring_buffer, fill_bytes);
}
soundio_instream_destroy(instream);
soundio_device_unref(selected_device);