2 This file is part of GNUnet.
3 Copyright (C) 2013 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
21 * @file conversation/gnunet-helper-audio-playback-gst.c
22 * @brief program to playback audio data to the speaker (GStreamer version)
26 #include "gnunet_util_lib.h"
27 #include "gnunet_protocols.h"
28 #include "conversation.h"
29 #include "gnunet_constants.h"
30 #include "gnunet_core_service.h"
33 #include <gst/audio/gstaudiobasesrc.h>
34 #include <gst/app/gstappsrc.h>
37 #define DEBUG_READ_PURE_OGG 1
40 * How much data to read in one go
45 * Max number of microseconds to buffer in audiosink.
48 #define BUFFER_TIME 1000
51 * Min number of microseconds to buffer in audiosink.
54 #define LATENCY_TIME 1000
57 * Tokenizer for the data we get from stdin
59 struct GNUNET_MessageStreamTokenizer *stdin_mst;
64 static GstElement *pipeline;
67 * Appsrc instance into which we write data for the pipeline.
69 static GstElement *source;
71 static GstElement *demuxer;
72 static GstElement *decoder;
73 static GstElement *conv;
74 static GstElement *resampler;
75 static GstElement *sink;
78 * Set to 1 to break the reading loop
80 static int abort_read;
84 sink_child_added (GstChildProxy *child_proxy,
89 if (GST_IS_AUDIO_BASE_SRC (object))
91 "buffer-time", (gint64) BUFFER_TIME,
92 "latency-time", (gint64) LATENCY_TIME,
98 ogg_pad_added (GstElement *element,
103 GstElement *decoder = (GstElement *) data;
105 /* We can now link this pad with the opus-decoder sink pad */
106 sinkpad = gst_element_get_static_pad (decoder, "sink");
108 gst_pad_link (pad, sinkpad);
110 gst_element_link_many (decoder, conv, resampler, sink, NULL);
112 gst_object_unref (sinkpad);
120 gst_app_src_end_of_stream (GST_APP_SRC (source));
121 if (NULL != pipeline)
122 gst_element_set_state (pipeline, GST_STATE_NULL);
128 bus_call (GstBus *bus, GstMessage *msg, gpointer data)
130 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
132 switch (GST_MESSAGE_TYPE (msg))
134 case GST_MESSAGE_EOS:
135 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
140 case GST_MESSAGE_ERROR:
145 gst_message_parse_error (msg, &error, &debug);
148 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
151 g_error_free (error);
166 signalhandler (int s)
173 feed_buffer_to_gst (const char *audio, size_t b_len)
179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
180 "Feeding %u bytes to GStreamer\n",
181 (unsigned int) b_len);
183 bufspace = g_memdup (audio, b_len);
184 b = gst_buffer_new_wrapped (bufspace, b_len);
187 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
188 "Failed to wrap a buffer\n");
190 return GNUNET_SYSERR;
192 flow = gst_app_src_push_buffer (GST_APP_SRC (source), b);
193 /* They all return GNUNET_OK, because currently player stops when
194 * data stops coming. This might need to be changed for the player
195 * to also stop when pipeline breaks.
200 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
201 "Fed %u bytes to the pipeline\n",
202 (unsigned int) b_len);
205 case GST_FLOW_FLUSHING:
206 /* buffer was dropped, because pipeline state is not PAUSED or PLAYING */
207 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
208 "Dropped a buffer\n");
213 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
218 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
219 "Unexpected push result\n");
229 * @param msg message we received.
230 * @return #GNUNET_OK on success,
231 * #GNUNET_NO to stop further processing due to disconnect (no error)
232 * #GNUNET_SYSERR to stop further processing due to error
235 stdin_receiver (void *cls,
236 const struct GNUNET_MessageHeader *msg)
238 struct AudioMessage *audio;
241 switch (ntohs (msg->type))
243 case GNUNET_MESSAGE_TYPE_CONVERSATION_AUDIO:
244 audio = (struct AudioMessage *) msg;
246 b_len = ntohs (audio->header.size) - sizeof(struct AudioMessage);
247 feed_buffer_to_gst ((const char *) &audio[1], b_len);
258 main (int argc, char **argv)
264 typedef void (*SignalHandlerPointer) (int);
266 SignalHandlerPointer inthandler, termhandler;
267 #ifdef DEBUG_READ_PURE_OGG
268 int read_pure_ogg = getenv ("GNUNET_READ_PURE_OGG") ? 1 : 0;
271 inthandler = signal (SIGINT,
273 termhandler = signal (SIGTERM,
277 gst_init (&argc, &argv);
279 GNUNET_assert (GNUNET_OK ==
280 GNUNET_log_setup ("gnunet-helper-audio-playback-gst",
284 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
285 "Audio sink starts\n");
287 stdin_mst = GNUNET_MST_create (&stdin_receiver,
290 /* Create gstreamer elements */
291 pipeline = gst_pipeline_new ("audio-player");
292 source = gst_element_factory_make ("appsrc", "audio-input");
293 demuxer = gst_element_factory_make ("oggdemux", "ogg-demuxer");
294 decoder = gst_element_factory_make ("opusdec", "opus-decoder");
295 conv = gst_element_factory_make ("audioconvert", "converter");
296 resampler = gst_element_factory_make ("audioresample", "resampler");
297 sink = gst_element_factory_make ("autoaudiosink", "audiosink");
299 if (! pipeline || ! source || ! conv || ! resampler || ! decoder ||
302 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
303 "One element could not be created. Exiting.\n");
307 g_signal_connect (sink,
309 G_CALLBACK (sink_child_added),
311 g_signal_connect (demuxer,
313 G_CALLBACK (ogg_pad_added),
316 /* Keep a reference to it, we operate on it */
317 gst_object_ref (GST_OBJECT (source));
319 /* Set up the pipeline */
321 /* we feed appsrc as fast as possible, it just blocks when it's full */
322 g_object_set (G_OBJECT (source),
323 /* "format", GST_FORMAT_TIME,*/
328 g_object_set (G_OBJECT (decoder),
330 /* "apply-gain", TRUE,*/
331 "use-inband-fec", TRUE,
334 /* we add a message handler */
335 bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
336 bus_watch_id = gst_bus_add_watch (bus, bus_call, pipeline);
337 gst_object_unref (bus);
339 /* we add all elements into the pipeline */
340 /* audio-input | ogg-demuxer | opus-decoder | converter | resampler | audiosink */
341 gst_bin_add_many (GST_BIN (pipeline), source, demuxer, decoder, conv,
342 resampler, sink, NULL);
344 /* we link the elements together */
345 gst_element_link_many (source, demuxer, NULL);
347 /* Set the pipeline to "playing" state*/
348 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Now playing\n");
349 gst_element_set_state (pipeline, GST_STATE_PLAYING);
351 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Running...\n");
356 char readbuf[MAXLINE];
359 ret = read (0, readbuf, sizeof(readbuf));
362 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
363 _ ("Read error from STDIN: %d %s\n"),
364 ret, strerror (errno));
368 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
369 "Received %d bytes of audio data (total: %llu)\n",
371 (unsigned long long) toff);
374 #ifdef DEBUG_READ_PURE_OGG
377 feed_buffer_to_gst (readbuf, ret);
381 GNUNET_MST_from_buffer (stdin_mst,
387 GNUNET_MST_destroy (stdin_mst);
389 signal (SIGINT, inthandler);
390 signal (SIGINT, termhandler);
392 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
393 "Returned, stopping playback\n");
396 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
397 "Deleting pipeline\n");
398 gst_object_unref (GST_OBJECT (source));
400 gst_object_unref (GST_OBJECT (pipeline));
402 g_source_remove (bus_watch_id);