summaryrefslogtreecommitdiffstats
path: root/app/fileplayer.cpp
blob: e26a3e65397ee4b6a1738fc986d340298800890c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
/*
 * Copyright (C) 2018 Konsulko Group
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "fileplayer.h"
#include <string>
#include <cstring>
#include <iostream>
#include <mutex>
#include <condition_variable>
#include <json-c/json.h>

#undef DEBUG

struct set_role_data
{
	bool state;
	std::string output;
	std::condition_variable cv;
};

static void on_hangup(void *closure, struct afb_wsj1 *wsj)
{
}

static void on_call(void *closure, const char *api, const char *verb, struct afb_wsj1_msg *msg)
{
}

static void on_event(void* closure, const char* event, struct afb_wsj1_msg *msg)
{
}

static void on_reply(void *closure, struct afb_wsj1_msg *msg)
{
	struct set_role_data *data = (struct set_role_data*) closure;
	struct json_object* reply;

	if(!(data && data->state))
		goto reply_done;

	// We opened the role, return the output
	reply = afb_wsj1_msg_object_j(msg);
	if(reply) {
#ifdef DEBUG
		std::cerr << __FUNCTION__ << ": reply = " << \
			json_object_to_json_string_ext(reply, JSON_C_TO_STRING_SPACED | JSON_C_TO_STRING_PRETTY) << \
			std::endl;
#endif
		struct json_object* response;
		int rc = json_object_object_get_ex(reply, "response", &response);
		if(rc) {
			struct json_object* val;
			rc = json_object_object_get_ex(response, "device_uri", &val);
			if (rc && json_object_get_string_len(val)) {
				const char* jres_pcm = json_object_get_string(val);
				data->output = jres_pcm;
#ifdef DEBUG
				std::cerr << __FUNCTION__ << ": output = " << jres_pcm << std::endl;
#endif
			}
		}
	}
reply_done:
	// Signal reply is done
	data->cv.notify_one();
}

static void *afb_loop_thread(struct sd_event* loop)
{
	for(;;)
		sd_event_run(loop, 30000000);
}

static void *gst_loop_thread(GMainLoop *loop)
{
	if(loop)
		g_main_loop_run(loop);
}

FilePlayer::FilePlayer(const int port, const std::string &token, const std::string &path, const std::string &role) :
	m_path(path),
	m_role(role)
{
	std::string uri;

	if(sd_event_new(&m_afb_loop) < 0) {
		std::cerr << __FUNCTION__ << ": Failed to create event loop" << std::endl;
		return;
	}

	// Initialize interface for websocket
	m_itf.on_hangup = on_hangup;
	m_itf.on_call = on_call;
	m_itf.on_event = on_event;

	uri = "ws://localhost:" + std::to_string(port) + "/api?token=" + token;
#ifdef DEBUG
	std::cerr << "Using URI: " << uri << std::endl;
#endif
	m_ws = afb_ws_client_connect_wsj1(m_afb_loop, uri.c_str(), &m_itf, NULL);
	if(m_ws) {
		m_afb_thread = std::thread(afb_loop_thread, m_afb_loop);
	} else {
		std::cerr << __FUNCTION__ << ": Failed to create websocket connection" << std::endl;
		goto error;
	}

        // Initialize GStreamer
        gst_init(NULL, NULL);

	// Create elements we need
	m_playbin = gst_element_factory_make("playbin", "play");
	m_alsa_sink = gst_element_factory_make("alsasink", NULL);
	if(!(m_playbin && m_alsa_sink))
		goto error;

	// Set up bus callback
	m_bus = gst_pipeline_get_bus(GST_PIPELINE(m_playbin));
	if(!m_bus)
		goto error;
	m_gst_loop = g_main_loop_new(NULL, FALSE);
	if(!m_gst_loop)
		goto error;
	gst_bus_add_watch(m_bus, gstreamer_bus_callback, this);

	// Start thread to run glib main loop for gstreamer bus
	m_gst_thread = std::thread(gst_loop_thread, m_gst_loop);

	m_valid = true;
	return;
error:
	gst_object_unref(m_playbin);
	m_playbin = nullptr;
	gst_object_unref(m_alsa_sink);
	m_alsa_sink = nullptr;
	gst_object_unref(m_bus);
	m_bus = nullptr;

	if(m_gst_loop) {
		g_main_loop_quit(m_gst_loop);
		m_gst_loop = nullptr;
	}
	if(m_afb_loop) {
		sd_event_unref(m_afb_loop);
		m_afb_loop = nullptr;
	}
	return;
}

FilePlayer::~FilePlayer(void)
{
	gst_element_set_state(m_playbin, GST_STATE_NULL);
	gst_object_unref(m_playbin);
	gst_object_unref(m_alsa_sink);
	gst_object_unref(m_bus);
	sd_event_unref(m_afb_loop);
}

void FilePlayer::play(bool loop)
{
	std::string output;

	if(!m_valid || m_playing)
		return;

	if(set_role_state(true, &output) != 0)
		return;

	if(output.empty())
		return;

	m_playing = true;
	m_looping = loop;

	g_object_set(m_alsa_sink, "device", output.c_str(), NULL);
	g_object_set(m_playbin, "audio-sink", m_alsa_sink, NULL);
	std::string uri = "file://" + m_path;
	g_object_set(m_playbin, "uri", uri.c_str(), NULL);

	// Start playback
	gst_element_set_state(m_playbin, GST_STATE_PLAYING);

	return;
}

void FilePlayer::stop(void)
{
	if(!(m_valid && m_playing))
		return;

	// Stop playback
	gst_element_set_state(m_playbin, GST_STATE_PAUSED);
}

gboolean FilePlayer::gstreamer_bus_callback(GstBus *bus, GstMessage *msg, gpointer data)
{
	if(!data)
		return TRUE;

	return static_cast<FilePlayer*>(data)->bus_callback(bus, msg);
}

int FilePlayer::set_role_state(bool state, std::string *output)
{
	if(!m_valid)
		return -1;

	set_role_data data;
	data.state = state;
	json_object *jsonData = json_object_new_object();
	json_object_object_add(jsonData, "action", json_object_new_string(state ? "open" : "close"));
	int rc = afb_wsj1_call_j(m_ws, "ahl-4a", m_role.c_str(), jsonData, on_reply, (void*) &data);
	if(rc >= 0) {
		// Wait for response
		std::mutex m;
		std::unique_lock<std::mutex> lk(m);
		data.cv.wait(lk);
		if(state && output)
			*output = data.output;
	} else {
		std::cerr << __FUNCTION__ <<  ": Failed to call ahl-4a/" << m_role.c_str() << std::endl;
	}
	return rc;
}

gboolean FilePlayer::bus_callback(GstBus *bus, GstMessage *msg)
{
	switch (GST_MESSAGE_TYPE(msg)) {
        case GST_MESSAGE_EOS:
#ifdef DEBUG
		std::cerr << __FUNCTION__ << ": GST_MESSAGE_EOS" << std::endl;
#endif
		if(m_looping) {
			// restart playback if at end
			if (!gst_element_seek(m_playbin, 
					      1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
					      GST_SEEK_TYPE_SET, 0,
					      GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE)) {
				std::cerr << "Seek failed!" << std::endl;
			}
		} else {
			// Move stream to paused state since we're done
			gst_element_set_state(m_playbin, GST_STATE_PAUSED);
		}
		break;
	case GST_MESSAGE_STATE_CHANGED: {
		if((GstElement*) GST_MESSAGE_SRC(msg) != m_playbin)
			break;

		GstState old_state, new_state;
		gst_message_parse_state_changed(msg, &old_state, &new_state, NULL);
#ifdef DEBUG
		std::cerr << __FUNCTION__ << ": GST_MESSAGE_STATE_CHANGE: " << (int) old_state << " to " << (int) new_state << std::endl;
#endif
		if(old_state == GST_STATE_PLAYING && new_state == GST_STATE_PAUSED) {
			set_role_state(false);

			// Seek back to beginning so any subsequent play starts there
			if (!gst_element_seek(m_playbin, 
					      1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
					      GST_SEEK_TYPE_SET, 0,
					      GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE)) {
				std::cerr << "Seek failed!" << std::endl;
			}

			m_playing = false;
		} else if(old_state == GST_STATE_READY && new_state == GST_STATE_NULL) {
			// clean up
			g_main_loop_quit(m_gst_loop);
		}
		break;
	}
        default:
		break;
	}
	return TRUE;
}