From f44ba092651aa75055e109e04b4164ea92ae7fdc Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 19 Jun 2006 21:53:48 +0000
Subject: big s/polyp/pulse/g

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1033 fefdeb5f-60dc-0310-8127-8f9354f1896f
---
 src/pulsecore/protocol-simple.c | 494 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 494 insertions(+)
 create mode 100644 src/pulsecore/protocol-simple.c

(limited to 'src/pulsecore/protocol-simple.c')

diff --git a/src/pulsecore/protocol-simple.c b/src/pulsecore/protocol-simple.c
new file mode 100644
index 00000000..4d73bd24
--- /dev/null
+++ b/src/pulsecore/protocol-simple.c
@@ -0,0 +1,494 @@
+/* $Id$ */
+
+/***
+  This file is part of PulseAudio.
+ 
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2 of the License,
+  or (at your option) any later version.
+ 
+  PulseAudio 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 Lesser General Public License
+  along with PulseAudio; 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 <assert.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/sink-input.h>
+#include <pulsecore/source-output.h>
+#include <pulsecore/client.h>
+#include <pulsecore/sample-util.h>
+#include <pulsecore/namereg.h>
+#include <pulsecore/log.h>
+#include <pulsecore/core-error.h>
+
+#include "protocol-simple.h"
+
+/* Don't allow more than this many concurrent connections */
+#define MAX_CONNECTIONS 10
+
+struct connection {
+    pa_protocol_simple *protocol;
+    pa_iochannel *io;
+    pa_sink_input *sink_input;
+    pa_source_output *source_output;
+    pa_client *client;
+    pa_memblockq *input_memblockq, *output_memblockq;
+    pa_defer_event *defer_event;
+
+    int dead;
+    
+    struct {
+        pa_memblock *current_memblock;
+        size_t memblock_index, fragment_size;
+    } playback;
+};
+
+struct pa_protocol_simple {
+    pa_module *module;
+    pa_core *core;
+    pa_socket_server*server;
+    pa_idxset *connections;
+    enum {
+        RECORD = 1,
+        PLAYBACK = 2,
+        DUPLEX = 3
+    } mode;
+    pa_sample_spec sample_spec;
+    char *source_name, *sink_name;
+};
+
+#define PLAYBACK_BUFFER_SECONDS (.5)
+#define PLAYBACK_BUFFER_FRAGMENTS (10)
+#define RECORD_BUFFER_SECONDS (5)
+#define RECORD_BUFFER_FRAGMENTS (100)
+
+static void connection_free(struct connection *c) {
+    assert(c);
+
+    pa_idxset_remove_by_data(c->protocol->connections, c, NULL);
+
+    if (c->playback.current_memblock)
+        pa_memblock_unref(c->playback.current_memblock);
+    if (c->sink_input) {
+        pa_sink_input_disconnect(c->sink_input);
+        pa_sink_input_unref(c->sink_input);
+    }
+    if (c->source_output) {
+        pa_source_output_disconnect(c->source_output);
+        pa_source_output_unref(c->source_output);
+    }
+    if (c->client)
+        pa_client_free(c->client);
+    if (c->io)
+        pa_iochannel_free(c->io);
+    if (c->input_memblockq)
+        pa_memblockq_free(c->input_memblockq);
+    if (c->output_memblockq)
+        pa_memblockq_free(c->output_memblockq);
+    if (c->defer_event)
+        c->protocol->core->mainloop->defer_free(c->defer_event);
+    pa_xfree(c);
+}
+
+static int do_read(struct connection *c) {
+    pa_memchunk chunk;
+    ssize_t r;
+    size_t l;
+
+    if (!c->sink_input || !(l = pa_memblockq_missing(c->input_memblockq)))
+        return 0;
+
+    if (l > c->playback.fragment_size)
+        l = c->playback.fragment_size;
+
+    if (c->playback.current_memblock) 
+        if (c->playback.current_memblock->length - c->playback.memblock_index < l) {
+            pa_memblock_unref(c->playback.current_memblock);
+            c->playback.current_memblock = NULL;
+            c->playback.memblock_index = 0;
+        }
+
+    if (!c->playback.current_memblock) {
+        c->playback.current_memblock = pa_memblock_new(c->playback.fragment_size*2, c->protocol->core->memblock_stat);
+        assert(c->playback.current_memblock && c->playback.current_memblock->length >= l);
+        c->playback.memblock_index = 0;
+    }
+    
+    if ((r = pa_iochannel_read(c->io, (uint8_t*) c->playback.current_memblock->data+c->playback.memblock_index, l)) <= 0) {
+        pa_log_debug(__FILE__": read(): %s", r == 0 ? "EOF" : pa_cstrerror(errno));
+        return -1;
+    }
+
+    chunk.memblock = c->playback.current_memblock;
+    chunk.index = c->playback.memblock_index;
+    chunk.length = r;
+    assert(chunk.memblock);
+
+    c->playback.memblock_index += r;
+    
+    assert(c->input_memblockq);
+    pa_memblockq_push_align(c->input_memblockq, &chunk);
+    assert(c->sink_input);
+    pa_sink_notify(c->sink_input->sink);
+    
+    return 0;
+}
+
+static int do_write(struct connection *c) {
+    pa_memchunk chunk;
+    ssize_t r;
+
+    if (!c->source_output)
+        return 0;    
+
+    assert(c->output_memblockq);
+    if (pa_memblockq_peek(c->output_memblockq, &chunk) < 0)
+        return 0;
+    
+    assert(chunk.memblock && chunk.length);
+    
+    if ((r = pa_iochannel_write(c->io, (uint8_t*) chunk.memblock->data+chunk.index, chunk.length)) < 0) {
+        pa_memblock_unref(chunk.memblock);
+        pa_log(__FILE__": write(): %s", pa_cstrerror(errno));
+        return -1;
+    }
+    
+    pa_memblockq_drop(c->output_memblockq, &chunk, r);
+    pa_memblock_unref(chunk.memblock);
+
+    pa_source_notify(c->source_output->source);
+    
+    return 0;
+}
+
+static void do_work(struct connection *c) {
+    assert(c);
+
+    assert(c->protocol && c->protocol->core && c->protocol->core->mainloop && c->protocol->core->mainloop->defer_enable);
+    c->protocol->core->mainloop->defer_enable(c->defer_event, 0);
+
+    if (c->dead)
+        return;
+    
+    if (pa_iochannel_is_readable(c->io)) {
+        if (do_read(c) < 0)
+            goto fail;
+    } else if (pa_iochannel_is_hungup(c->io))
+        goto fail;
+
+    if (pa_iochannel_is_writable(c->io)) {
+        if (do_write(c) < 0)
+            goto fail;
+    } 
+
+    return;
+
+fail:
+
+    if (c->sink_input) {
+        c->dead = 1;
+        
+        pa_iochannel_free(c->io);
+        c->io = NULL;
+
+        pa_memblockq_prebuf_disable(c->input_memblockq);
+        pa_sink_notify(c->sink_input->sink);
+    } else
+        connection_free(c);
+}
+
+/*** sink_input callbacks ***/
+
+static int sink_input_peek_cb(pa_sink_input *i, pa_memchunk *chunk) {
+    struct connection*c;
+    assert(i && i->userdata && chunk);
+    c = i->userdata;
+    
+    if (pa_memblockq_peek(c->input_memblockq, chunk) < 0) {
+        
+        if (c->dead)
+            connection_free(c);
+        
+        return -1;
+    }
+
+    return 0;
+}
+
+static void sink_input_drop_cb(pa_sink_input *i, const pa_memchunk *chunk, size_t length) {
+    struct connection*c = i->userdata;
+    assert(i && c && length);
+
+    pa_memblockq_drop(c->input_memblockq, chunk, length);
+
+    /* do something */
+    assert(c->protocol && c->protocol->core && c->protocol->core->mainloop && c->protocol->core->mainloop->defer_enable);
+    c->protocol->core->mainloop->defer_enable(c->defer_event, 1);
+}
+
+static void sink_input_kill_cb(pa_sink_input *i) {
+    assert(i && i->userdata);
+    connection_free((struct connection *) i->userdata);
+}
+
+
+static pa_usec_t sink_input_get_latency_cb(pa_sink_input *i) {
+    struct connection*c = i->userdata;
+    assert(i && c);
+    return pa_bytes_to_usec(pa_memblockq_get_length(c->input_memblockq), &c->sink_input->sample_spec);
+}
+
+/*** source_output callbacks ***/
+
+static void source_output_push_cb(pa_source_output *o, const pa_memchunk *chunk) {
+    struct connection *c = o->userdata;
+    assert(o && c && chunk);
+
+    pa_memblockq_push(c->output_memblockq, chunk);
+
+    /* do something */
+    assert(c->protocol && c->protocol->core && c->protocol->core->mainloop && c->protocol->core->mainloop->defer_enable);
+    c->protocol->core->mainloop->defer_enable(c->defer_event, 1);
+}
+
+static void source_output_kill_cb(pa_source_output *o) {
+    assert(o && o->userdata);
+    connection_free((struct connection *) o->userdata);
+}
+
+static pa_usec_t source_output_get_latency_cb(pa_source_output *o) {
+    struct connection*c = o->userdata;
+    assert(o && c);
+    return pa_bytes_to_usec(pa_memblockq_get_length(c->output_memblockq), &c->source_output->sample_spec);
+}
+
+/*** client callbacks ***/
+
+static void client_kill_cb(pa_client *c) {
+    assert(c && c->userdata);
+    connection_free((struct connection *) c->userdata);
+}
+
+/*** pa_iochannel callbacks ***/
+
+static void io_callback(pa_iochannel*io, void *userdata) {
+    struct connection *c = userdata;
+    assert(io && c && c->io == io);
+
+    do_work(c);
+}
+
+/*** fixed callback ***/
+
+static void defer_callback(pa_mainloop_api*a, pa_defer_event *e, void *userdata) {
+    struct connection *c = userdata;
+    assert(a && c && c->defer_event == e);
+
+    do_work(c);
+}
+
+/*** socket_server callbacks ***/
+
+static void on_connection(pa_socket_server*s, pa_iochannel *io, void *userdata) {
+    pa_protocol_simple *p = userdata;
+    struct connection *c = NULL;
+    char cname[256];
+    assert(s && io && p);
+
+    if (pa_idxset_size(p->connections)+1 > MAX_CONNECTIONS) {
+        pa_log(__FILE__": Warning! Too many connections (%u), dropping incoming connection.", MAX_CONNECTIONS);
+        pa_iochannel_free(io);
+        return;
+    }
+
+    c = pa_xmalloc(sizeof(struct connection));
+    c->io = io;
+    c->sink_input = NULL;
+    c->source_output = NULL;
+    c->defer_event = NULL;
+    c->input_memblockq = c->output_memblockq = NULL;
+    c->protocol = p;
+    c->playback.current_memblock = NULL;
+    c->playback.memblock_index = 0;
+    c->playback.fragment_size = 0;
+    c->dead = 0;
+    
+    pa_iochannel_socket_peer_to_string(io, cname, sizeof(cname));
+    c->client = pa_client_new(p->core, __FILE__, cname);
+    assert(c->client);
+    c->client->owner = p->module;
+    c->client->kill = client_kill_cb;
+    c->client->userdata = c;
+
+    if (p->mode & PLAYBACK) {
+        pa_sink *sink;
+        size_t l;
+
+        if (!(sink = pa_namereg_get(p->core, p->sink_name, PA_NAMEREG_SINK, 1))) {
+            pa_log(__FILE__": Failed to get sink.");
+            goto fail;
+        }
+
+        if (!(c->sink_input = pa_sink_input_new(sink, __FILE__, c->client->name, &p->sample_spec, NULL, NULL, 0, -1))) {
+            pa_log(__FILE__": Failed to create sink input.");
+            goto fail;
+        }
+        
+        c->sink_input->owner = p->module;
+        c->sink_input->client = c->client;
+        
+        c->sink_input->peek = sink_input_peek_cb;
+        c->sink_input->drop = sink_input_drop_cb;
+        c->sink_input->kill = sink_input_kill_cb;
+        c->sink_input->get_latency = sink_input_get_latency_cb;
+        c->sink_input->userdata = c;
+
+        l = (size_t) (pa_bytes_per_second(&p->sample_spec)*PLAYBACK_BUFFER_SECONDS);
+        c->input_memblockq = pa_memblockq_new(
+                0,
+                l,
+                0,
+                pa_frame_size(&p->sample_spec),
+                (size_t) -1,
+                l/PLAYBACK_BUFFER_FRAGMENTS,
+                NULL,
+                p->core->memblock_stat);
+        assert(c->input_memblockq);
+        pa_iochannel_socket_set_rcvbuf(io, l/PLAYBACK_BUFFER_FRAGMENTS*5);
+        c->playback.fragment_size = l/10;
+    }
+
+    if (p->mode & RECORD) {
+        pa_source *source;
+        size_t l;
+
+        if (!(source = pa_namereg_get(p->core, p->source_name, PA_NAMEREG_SOURCE, 1))) {
+            pa_log(__FILE__": Failed to get source.");
+            goto fail;
+        }
+
+        c->source_output = pa_source_output_new(source, __FILE__, c->client->name, &p->sample_spec, NULL, -1);
+        if (!c->source_output) {
+            pa_log(__FILE__": Failed to create source output.");
+            goto fail;
+        }
+        c->source_output->owner = p->module;
+        c->source_output->client = c->client;
+        
+        c->source_output->push = source_output_push_cb;
+        c->source_output->kill = source_output_kill_cb;
+        c->source_output->get_latency = source_output_get_latency_cb;
+        c->source_output->userdata = c;
+
+        l = (size_t) (pa_bytes_per_second(&p->sample_spec)*RECORD_BUFFER_SECONDS);
+        c->output_memblockq = pa_memblockq_new(
+                0,
+                l,
+                0,
+                pa_frame_size(&p->sample_spec),
+                1,
+                0,
+                NULL,
+                p->core->memblock_stat);
+        pa_iochannel_socket_set_sndbuf(io, l/RECORD_BUFFER_FRAGMENTS*2);
+    }
+
+    pa_iochannel_set_callback(c->io, io_callback, c);
+    pa_idxset_put(p->connections, c, NULL);
+
+    c->defer_event = p->core->mainloop->defer_new(p->core->mainloop, defer_callback, c);
+    assert(c->defer_event);
+    p->core->mainloop->defer_enable(c->defer_event, 0);
+    
+    return;
+    
+fail:
+    if (c)
+        connection_free(c);
+}
+
+pa_protocol_simple* pa_protocol_simple_new(pa_core *core, pa_socket_server *server, pa_module *m, pa_modargs *ma) {
+    pa_protocol_simple* p = NULL;
+    int enable;
+    assert(core && server && ma);
+
+    p = pa_xmalloc0(sizeof(pa_protocol_simple));
+    p->module = m;
+    p->core = core;
+    p->server = server;
+    p->connections = pa_idxset_new(NULL, NULL);
+
+    p->sample_spec = core->default_sample_spec;
+    if (pa_modargs_get_sample_spec(ma, &p->sample_spec) < 0) {
+        pa_log(__FILE__": Failed to parse sample type specification.");
+        goto fail;
+    }
+
+    p->source_name = pa_xstrdup(pa_modargs_get_value(ma, "source", NULL));
+    p->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
+    
+    enable = 0;
+    if (pa_modargs_get_value_boolean(ma, "record", &enable) < 0) {
+        pa_log(__FILE__": record= expects a numeric argument.");
+        goto fail;
+    }
+    p->mode = enable ? RECORD : 0;
+
+    enable = 1;
+    if (pa_modargs_get_value_boolean(ma, "playback", &enable) < 0) {
+        pa_log(__FILE__": playback= expects a numeric argument.");
+        goto fail;
+    }
+    p->mode |= enable ? PLAYBACK : 0;
+
+    if ((p->mode & (RECORD|PLAYBACK)) == 0) {
+        pa_log(__FILE__": neither playback nor recording enabled for protocol.");
+        goto fail;
+    }
+    
+    pa_socket_server_set_callback(p->server, on_connection, p);
+    
+    return p;
+
+fail:
+    if (p)
+        pa_protocol_simple_free(p);
+    return NULL;
+}
+
+
+void pa_protocol_simple_free(pa_protocol_simple *p) {
+    struct connection *c;
+    assert(p);
+
+    if (p->connections) {
+        while((c = pa_idxset_first(p->connections, NULL)))
+            connection_free(c);
+        
+        pa_idxset_free(p->connections, NULL, NULL);
+    }
+
+    if (p->server)
+        pa_socket_server_unref(p->server);
+    pa_xfree(p);
+}
+
-- 
cgit