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-rw-r--r--polyp/pacat.c336
1 files changed, 336 insertions, 0 deletions
diff --git a/polyp/pacat.c b/polyp/pacat.c
new file mode 100644
index 00000000..1d1cc3d5
--- /dev/null
+++ b/polyp/pacat.c
@@ -0,0 +1,336 @@
+/* $Id$ */
+
+/***
+ This file is part of polypaudio.
+
+ polypaudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 2 of the License,
+ or (at your option) any later version.
+
+ polypaudio is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with polypaudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <signal.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "polyplib.h"
+#include "polyplib-error.h"
+#include "mainloop.h"
+#include "mainloop-signal.h"
+
+static enum { RECORD, PLAYBACK } mode = PLAYBACK;
+
+static struct pa_context *context = NULL;
+static struct pa_stream *stream = NULL;
+static struct pa_mainloop_api *mainloop_api = NULL;
+
+static void *buffer = NULL;
+static size_t buffer_length = 0, buffer_index = 0;
+
+static void* stdio_source = NULL;
+
+static void quit(int ret) {
+ assert(mainloop_api);
+ mainloop_api->quit(mainloop_api, ret);
+}
+
+static void context_die_callback(struct pa_context *c, void *userdata) {
+ assert(c);
+ fprintf(stderr, "Connection to server shut down, exiting.\n");
+ quit(1);
+}
+
+static void stream_die_callback(struct pa_stream *s, void *userdata) {
+ assert(s);
+ fprintf(stderr, "Stream deleted, exiting.\n");
+ quit(1);
+}
+
+static void do_stream_write(size_t length) {
+ size_t l;
+ assert(length);
+
+ if (!buffer || !buffer_length)
+ return;
+
+ l = length;
+ if (l > buffer_length)
+ l = buffer_length;
+
+ pa_stream_write(stream, buffer+buffer_index, l);
+ buffer_length -= l;
+ buffer_index += l;
+
+ if (!buffer_length) {
+ free(buffer);
+ buffer = NULL;
+ buffer_index = buffer_length = 0;
+ }
+}
+
+static void stream_write_callback(struct pa_stream *s, size_t length, void *userdata) {
+ assert(s && length);
+
+ if (stdio_source)
+ mainloop_api->enable_io(mainloop_api, stdio_source, PA_MAINLOOP_API_IO_EVENT_INPUT);
+
+ if (!buffer)
+ return;
+
+ do_stream_write(length);
+}
+
+static void stream_read_callback(struct pa_stream *s, const void*data, size_t length, void *userdata) {
+ assert(s && data && length);
+
+ if (stdio_source)
+ mainloop_api->enable_io(mainloop_api, stdio_source, PA_MAINLOOP_API_IO_EVENT_OUTPUT);
+
+ if (buffer) {
+ fprintf(stderr, "Buffer overrrun, dropping incoming data\n");
+ return;
+ }
+
+ buffer = malloc(buffer_length = length);
+ assert(buffer);
+ memcpy(buffer, data, length);
+ buffer_index = 0;
+}
+
+static void stream_complete_callback(struct pa_stream*s, int success, void *userdata) {
+ assert(s);
+
+ if (!success) {
+ fprintf(stderr, "Stream creation failed: %s\n", pa_strerror(pa_context_errno(pa_stream_get_context(s))));
+ quit(1);
+ return;
+ }
+
+ fprintf(stderr, "Stream created.\n");
+}
+
+static void context_complete_callback(struct pa_context *c, int success, void *userdata) {
+ static const struct pa_sample_spec ss = {
+ .format = PA_SAMPLE_S16LE,
+ .rate = 44100,
+ .channels = 2
+ };
+
+ assert(c && !stream);
+
+ if (!success) {
+ fprintf(stderr, "Connection failed: %s\n", pa_strerror(pa_context_errno(c)));
+ goto fail;
+ }
+
+ fprintf(stderr, "Connection established.\n");
+
+ if (!(stream = pa_stream_new(c, mode == PLAYBACK ? PA_STREAM_PLAYBACK : PA_STREAM_RECORD, NULL, "pacat", &ss, NULL, stream_complete_callback, NULL))) {
+ fprintf(stderr, "pa_stream_new() failed: %s\n", pa_strerror(pa_context_errno(c)));
+ goto fail;
+ }
+
+ pa_stream_set_die_callback(stream, stream_die_callback, NULL);
+ pa_stream_set_write_callback(stream, stream_write_callback, NULL);
+ pa_stream_set_read_callback(stream, stream_read_callback, NULL);
+
+ return;
+
+fail:
+ quit(1);
+}
+
+static void context_drain_complete(struct pa_context*c, void *userdata) {
+ quit(0);
+}
+
+static void stream_drain_complete(struct pa_stream*s, void *userdata) {
+ fprintf(stderr, "Playback stream drained.\n");
+
+ pa_stream_free(stream);
+ stream = NULL;
+
+ if (pa_context_drain(context, context_drain_complete, NULL) < 0)
+ quit(0);
+ else
+ fprintf(stderr, "Draining connection to server.\n");
+}
+
+static void stdin_callback(struct pa_mainloop_api*a, void *id, int fd, enum pa_mainloop_api_io_events events, void *userdata) {
+ size_t l, w = 0;
+ ssize_t r;
+ assert(a == mainloop_api && id && stdio_source == id);
+
+ if (buffer) {
+ mainloop_api->enable_io(mainloop_api, stdio_source, PA_MAINLOOP_API_IO_EVENT_NULL);
+ return;
+ }
+
+ if (!stream || !pa_stream_is_ready(stream) || !(l = w = pa_stream_writable_size(stream)))
+ l = 4096;
+
+ buffer = malloc(l);
+ assert(buffer);
+ if ((r = read(fd, buffer, l)) <= 0) {
+ if (r == 0) {
+ fprintf(stderr, "Got EOF.\n");
+ pa_stream_drain(stream, stream_drain_complete, NULL);
+ } else {
+ fprintf(stderr, "read() failed: %s\n", strerror(errno));
+ quit(1);
+ }
+
+ mainloop_api->cancel_io(mainloop_api, stdio_source);
+ stdio_source = NULL;
+ return;
+ }
+
+ buffer_length = r;
+ buffer_index = 0;
+
+ if (w)
+ do_stream_write(w);
+}
+
+static void stdout_callback(struct pa_mainloop_api*a, void *id, int fd, enum pa_mainloop_api_io_events events, void *userdata) {
+ ssize_t r;
+ assert(a == mainloop_api && id && stdio_source == id);
+
+ if (!buffer) {
+ mainloop_api->enable_io(mainloop_api, stdio_source, PA_MAINLOOP_API_IO_EVENT_NULL);
+ return;
+ }
+
+ assert(buffer_length);
+
+ if ((r = write(fd, buffer+buffer_index, buffer_length)) <= 0) {
+ fprintf(stderr, "write() failed: %s\n", strerror(errno));
+ quit(1);
+
+ mainloop_api->cancel_io(mainloop_api, stdio_source);
+ stdio_source = NULL;
+ return;
+ }
+
+ buffer_length -= r;
+ buffer_index += r;
+
+ if (!buffer_length) {
+ free(buffer);
+ buffer = NULL;
+ buffer_length = buffer_index = 0;
+ }
+}
+
+static void exit_signal_callback(void *id, int sig, void *userdata) {
+ fprintf(stderr, "Got SIGINT, exiting.\n");
+ quit(0);
+
+}
+
+static void stream_get_latency_callback(struct pa_stream *s, uint32_t latency, void *userdata) {
+ assert(s);
+
+ if (latency == (uint32_t) -1) {
+ fprintf(stderr, "Failed to get latency: %s\n", strerror(errno));
+ quit(1);
+ return;
+ }
+
+ fprintf(stderr, "Current latency is %u usecs.\n", latency);
+}
+
+static void sigusr1_signal_callback(void *id, int sig, void *userdata) {
+ if (mode == PLAYBACK) {
+ fprintf(stderr, "Got SIGUSR1, requesting latency.\n");
+ pa_stream_get_latency(stream, stream_get_latency_callback, NULL);
+ }
+}
+
+int main(int argc, char *argv[]) {
+ struct pa_mainloop* m = NULL;
+ int ret = 1, r;
+ char *bn;
+
+ if (!(bn = strrchr(argv[0], '/')))
+ bn = argv[0];
+
+ if (strstr(bn, "rec") || strstr(bn, "mon"))
+ mode = RECORD;
+ else if (strstr(bn, "cat") || strstr(bn, "play"))
+ mode = PLAYBACK;
+
+ fprintf(stderr, "Opening a %s stream.\n", mode == RECORD ? "recording" : "playback");
+
+ if (!(m = pa_mainloop_new())) {
+ fprintf(stderr, "pa_mainloop_new() failed.\n");
+ goto quit;
+ }
+
+ mainloop_api = pa_mainloop_get_api(m);
+
+ r = pa_signal_init(mainloop_api);
+ assert(r == 0);
+ pa_signal_register(SIGINT, exit_signal_callback, NULL);
+ pa_signal_register(SIGUSR1, sigusr1_signal_callback, NULL);
+ signal(SIGPIPE, SIG_IGN);
+
+ if (!(stdio_source = mainloop_api->source_io(mainloop_api,
+ mode == PLAYBACK ? STDIN_FILENO : STDOUT_FILENO,
+ mode == PLAYBACK ? PA_MAINLOOP_API_IO_EVENT_INPUT : PA_MAINLOOP_API_IO_EVENT_OUTPUT,
+ mode == PLAYBACK ? stdin_callback : stdout_callback, NULL))) {
+ fprintf(stderr, "source_io() failed.\n");
+ goto quit;
+ }
+
+ if (!(context = pa_context_new(mainloop_api, argv[0]))) {
+ fprintf(stderr, "pa_context_new() failed.\n");
+ goto quit;
+ }
+
+ if (pa_context_connect(context, NULL, context_complete_callback, NULL) < 0) {
+ fprintf(stderr, "pa_context_connext() failed.\n");
+ goto quit;
+ }
+
+ pa_context_set_die_callback(context, context_die_callback, NULL);
+
+ if (pa_mainloop_run(m, &ret) < 0) {
+ fprintf(stderr, "pa_mainloop_run() failed.\n");
+ goto quit;
+ }
+
+quit:
+ if (stream)
+ pa_stream_free(stream);
+ if (context)
+ pa_context_free(context);
+
+ if (m) {
+ pa_signal_done();
+ pa_mainloop_free(m);
+ }
+
+ if (buffer)
+ free(buffer);
+
+ return ret;
+}