2 * This file is part of DisOrder
3 * Copyright (C) 2013 Mark Wooding
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 /** @file server/gstdecode.c
19 * @brief Decode compressed audio files, and apply ReplayGain.
22 #include "disorder-server.h"
24 #include "speaker-protocol.h"
26 /* Ugh. It turns out that libxml tries to define a function called
27 * `attribute', and it's included by GStreamer for some unimaginable reason.
28 * So undefine it here. We'll want GCC attributes for special effects, but
29 * can take care of ourselves.
35 #include <gst/app/gstappsink.h>
36 #include <gst/audio/audio.h>
38 /* The only application we have for `attribute' is declaring function
39 * arguments as being unused, because we have a lot of callback functions
40 * which are meant to comply with an externally defined interface.
43 # define UNUSED __attribute__((unused))
46 #define END ((void *)0)
47 #define N(v) (sizeof(v)/sizeof(*(v)))
50 static const char *file;
51 static GstAppSink *appsink;
52 static GstElement *pipeline;
53 static GMainLoop *loop;
54 static unsigned flags = 0;
57 #define MODES(_) _("off", OFF) _("track", TRACK) _("album", ALBUM)
59 #define DEFENUM(name, tag) tag,
64 static const char *const modes[] = {
65 #define DEFNAME(name, tag) name,
71 static const char *const dithers[] = {
72 "none", "rpdf", "tpdf", "tpdf-hf", 0
75 static const char *const shapes[] = {
76 "none", "error-feedback", "simple", "medium", "high", 0
79 static int dither = -1;
80 static int mode = ALBUM;
81 static int quality = -1;
82 static int shape = -1;
83 static gdouble fallback = 0.0;
85 static struct stream_header hdr;
87 /* Report the pads of an element ELT, as iterated by IT; WHAT is an adjective
88 * phrase describing the pads for use in the output.
90 static void report_element_pads(const char *what, GstElement *elt,
94 #ifdef HAVE_GSTREAMER_0_10
103 #ifdef HAVE_GSTREAMER_0_10
104 switch(gst_iterator_next(it, &pad)) {
106 switch(gst_iterator_next(it, &gv)) {
108 case GST_ITERATOR_DONE:
110 case GST_ITERATOR_OK:
111 #ifdef HAVE_GSTREAMER_0_10
112 cs = gst_caps_to_string(GST_PAD_CAPS(pad));
114 assert(G_VALUE_HOLDS(&gv, GST_TYPE_PAD));
115 pad = g_value_get_object(&gv);
116 caps = gst_pad_query_caps(pad, 0);
117 cs = gst_caps_to_string(caps);
118 gst_caps_unref(caps);
120 disorder_error(0, " `%s' %s pad: %s", GST_OBJECT_NAME(elt), what, cs);
122 gst_object_unref(pad);
124 case GST_ITERATOR_RESYNC:
125 gst_iterator_resync(it);
127 case GST_ITERATOR_ERROR:
128 disorder_error(0, "<failed to enumerate `%s' %s pads>",
129 GST_OBJECT_NAME(elt), what);
135 gst_iterator_free(it);
138 /* Link together two elements; fail with an approximately useful error
139 * message if it didn't work.
141 static void link_elements(GstElement *left, GstElement *right)
143 /* Try to link things together. */
144 if(gst_element_link(left, right)) return;
146 /* If this didn't work, it's probably for some really hairy reason, so
147 * provide a bunch of debugging information.
149 disorder_error(0, "failed to link GStreamer elements `%s' and `%s'",
150 GST_OBJECT_NAME(left), GST_OBJECT_NAME(right));
151 report_element_pads("source", left, gst_element_iterate_src_pads(left));
152 report_element_pads("source", right, gst_element_iterate_sink_pads(right));
153 disorder_fatal(0, "can't decode `%s'", file);
156 /* The `decoderbin' element (DECODE) has deigned to announce a new PAD.
157 * Maybe we should attach the tag end of our pipeline (starting with the
160 static void decoder_pad_arrived(GstElement *decode, GstPad *pad, gpointer u)
162 GstElement *tail = u;
163 #ifdef HAVE_GSTREAMER_0_10
164 GstCaps *caps = gst_pad_get_caps(pad);
166 GstCaps *caps = gst_pad_get_current_caps(pad);
172 /* The input file could be more or less anything, so this could be any kind
173 * of pad. We're only interested if it's audio, so let's go check.
175 for(i = 0, n = gst_caps_get_size(caps); i < n; i++) {
176 s = gst_caps_get_structure(caps, i);
177 name = gst_structure_get_name(s);
178 #ifdef HAVE_GSTREAMER_0_10
179 if(strncmp(name, "audio/x-raw-", 12) == 0)
181 if(strcmp(name, "audio/x-raw") == 0)
188 /* Yes, it's audio. Link the two elements together. */
189 link_elements(decode, tail);
191 /* If requested using the environemnt variable `GST_DEBUG_DUMP_DOT_DIR',
192 * write a dump of the now-completed pipeline.
194 GST_DEBUG_BIN_TO_DOT_FILE(GST_BIN(pipeline),
195 GST_DEBUG_GRAPH_SHOW_ALL,
196 "disorder-gstdecode");
199 gst_caps_unref(caps);
202 /* Prepare the GStreamer pipeline, ready to decode the given FILE. This sets
203 * up the variables `appsink' and `pipeline'.
205 static void prepare_pipeline(void)
207 GstElement *source = gst_element_factory_make("filesrc", "file");
208 GstElement *decode = gst_element_factory_make("decodebin", "decode");
209 GstElement *resample = gst_element_factory_make("audioresample",
211 GstElement *convert = gst_element_factory_make("audioconvert", "convert");
212 GstElement *sink = gst_element_factory_make("appsink", "sink");
213 GstElement *tail = sink;
216 const struct stream_header *fmt = &config->sample_format;
218 #ifndef HAVE_GSTREAMER_0_10
219 static const struct fmttab {
224 { "S8", 8, ENDIAN_BIG },
225 { "S8", 8, ENDIAN_LITTLE },
226 { "S16BE", 16, ENDIAN_BIG },
227 { "S16LE", 16, ENDIAN_LITTLE },
230 const struct fmttab *ft;
233 /* Set up the global variables. */
234 pipeline = gst_pipeline_new("pipe");
235 appsink = GST_APP_SINK(sink);
237 /* Configure the various simple elements. */
238 g_object_set(source, "location", file, END);
239 g_object_set(sink, "sync", FALSE, END);
241 /* Configure the resampler and converter. Leave things as their defaults
242 * if the user hasn't made an explicit request.
244 if(quality >= 0) g_object_set(resample, "quality", quality, END);
245 if(dither >= 0) g_object_set(convert, "dithering", dither, END);
246 if(shape >= 0) g_object_set(convert, "noise-shaping", shape, END);
248 /* Set up the sink's capabilities from the configuration. */
249 #ifdef HAVE_GSTREAMER_0_10
250 caps = gst_caps_new_simple("audio/x-raw-int",
251 "width", G_TYPE_INT, fmt->bits,
252 "depth", G_TYPE_INT, fmt->bits,
253 "channels", G_TYPE_INT, fmt->channels,
254 "signed", G_TYPE_BOOLEAN, TRUE,
255 "rate", G_TYPE_INT, fmt->rate,
256 "endianness", G_TYPE_INT,
257 fmt->endian == ENDIAN_BIG ?
258 G_BIG_ENDIAN : G_LITTLE_ENDIAN,
261 for (ft = fmttab; ft->fmt; ft++)
262 if (ft->bits == fmt->bits && ft->endian == fmt->endian) break;
264 disorder_fatal(0, "unsupported sample format: bits=%"PRIu32", endian=%u",
265 fmt->bits, fmt->endian);
267 caps = gst_caps_new_simple("audio/x-raw",
268 "format", G_TYPE_STRING, ft->fmt,
269 "channels", G_TYPE_INT, fmt->channels,
270 "rate", G_TYPE_INT, fmt->rate,
273 gst_app_sink_set_caps(appsink, caps);
274 gst_caps_unref(caps);
276 /* Add the various elements into the pipeline. We'll stitch them together
277 * in pieces, because the pipeline is somewhat dynamic.
279 gst_bin_add_many(GST_BIN(pipeline),
281 resample, convert, sink, END);
283 /* Link audio conversion stages onto the front. The rest of DisOrder
284 * doesn't handle much of the full panoply of exciting audio formats.
286 link_elements(convert, tail); tail = convert;
287 link_elements(resample, tail); tail = resample;
289 /* If we're meant to do ReplayGain then insert it into the pipeline before
293 gain = gst_element_factory_make("rgvolume", "gain");
295 "album-mode", mode == ALBUM,
296 "fallback-gain", fallback,
298 gst_bin_add(GST_BIN(pipeline), gain);
299 link_elements(gain, tail); tail = gain;
302 /* Link the source and the decoder together. The `decodebin' is annoying
303 * and doesn't have any source pads yet, so the best we can do is make two
304 * halves of the chain, and add a hook to stitch them together later.
306 link_elements(source, decode);
307 g_signal_connect(decode, "pad-added",
308 G_CALLBACK(decoder_pad_arrived), tail);
311 /* Respond to a message from the BUS. The only thing we need worry about
312 * here is errors from the pipeline.
314 static void bus_message(GstBus UNUSED *bus, GstMessage *msg,
317 switch(GST_MESSAGE_TYPE(msg)) {
318 case GST_MESSAGE_ERROR:
319 disorder_fatal(0, "%s",
320 gst_structure_get_string(gst_message_get_structure(msg),
327 /* End of stream. Stop polling the main loop. */
328 static void cb_eos(GstAppSink UNUSED *sink, gpointer UNUSED u)
329 { g_main_loop_quit(loop); }
331 /* Preroll buffers are prepared when the pipeline moves to the `paused'
332 * state, so that they're ready for immediate playback. Conveniently, they
333 * also carry format information, which is what we want here. Stash the
334 * sample format information in the `stream_header' structure ready for
335 * actual buffers of interesting data.
337 static GstFlowReturn cb_preroll(GstAppSink *sink, gpointer UNUSED u)
339 #ifdef HAVE_GSTREAMER_0_10
340 GstBuffer *buf = gst_app_sink_pull_preroll(sink);
341 GstCaps *caps = GST_BUFFER_CAPS(buf);
343 GstSample *samp = gst_app_sink_pull_preroll(sink);
344 GstCaps *caps = gst_sample_get_caps(samp);
347 #ifdef HAVE_GST_AUDIO_INFO_FROM_CAPS
349 /* Parse the audio format information out of the caps. There's a handy
350 * function to do this in later versions of gst-plugins-base, so use that
351 * if it's available. Once we no longer care about supporting such old
352 * versions we can delete the version which does the job the hard way.
357 if(!gst_audio_info_from_caps(&ai, caps))
358 disorder_fatal(0, "can't decode `%s': failed to parse audio info", file);
360 hdr.channels = ai.channels;
361 hdr.bits = ai.finfo->width;
362 hdr.endian = ai.finfo->endianness == G_BIG_ENDIAN ?
363 ENDIAN_BIG : ENDIAN_LITTLE;
369 gint rate, channels, bits, endian;
372 /* Make sure that the caps is basically the right shape. */
373 if(!GST_CAPS_IS_SIMPLE(caps)) disorder_fatal(0, "expected simple caps");
374 s = gst_caps_get_structure(caps, 0);
375 ty = gst_structure_get_name(s);
376 if(strcmp(ty, "audio/x-raw-int") != 0)
377 disorder_fatal(0, "unexpected content type `%s'", ty);
379 /* Extract fields from the structure. */
380 if(!gst_structure_get(s,
381 "rate", G_TYPE_INT, &rate,
382 "channels", G_TYPE_INT, &channels,
383 "width", G_TYPE_INT, &bits,
384 "endianness", G_TYPE_INT, &endian,
385 "signed", G_TYPE_BOOLEAN, &signedp,
387 disorder_fatal(0, "can't decode `%s': failed to parse audio caps", file);
388 hdr.rate = rate; hdr.channels = channels; hdr.bits = bits;
389 hdr.endian = endian == G_BIG_ENDIAN ? ENDIAN_BIG : ENDIAN_LITTLE;
393 #ifdef HAVE_GSTREAMER_0_10
394 gst_buffer_unref(buf);
396 gst_sample_unref(samp);
401 /* A new buffer of sample data has arrived, so we should pass it on with
402 * appropriate framing.
404 static GstFlowReturn cb_buffer(GstAppSink *sink, gpointer UNUSED u)
406 #ifdef HAVE_GSTREAMER_0_10
407 GstBuffer *buf = gst_app_sink_pull_buffer(sink);
409 GstSample *samp = gst_app_sink_pull_sample(sink);
410 GstBuffer *buf = gst_sample_get_buffer(samp);
416 /* Make sure we actually have a grip on the sample format here. */
417 if(!hdr.rate) disorder_fatal(0, "format unset");
419 /* Write out a frame of audio data. */
420 #ifdef HAVE_GSTREAMER_0_10
421 hdr.nbytes = GST_BUFFER_SIZE(buf);
422 if((!(flags&f_stream) && fwrite(&hdr, sizeof(hdr), 1, fp) != 1) ||
423 fwrite(GST_BUFFER_DATA(buf), 1, hdr.nbytes, fp) != hdr.nbytes)
424 disorder_fatal(errno, "output");
426 for(i = 0, n = gst_buffer_n_memory(buf); i < n; i++) {
427 mem = gst_buffer_peek_memory(buf, i);
428 if(!gst_memory_map(mem, &map, GST_MAP_READ))
429 disorder_fatal(0, "failed to map sample buffer");
430 hdr.nbytes = map.size;
431 if((!(flags&f_stream) && fwrite(&hdr, sizeof(hdr), 1, fp) != 1) ||
432 fwrite(map.data, 1, map.size, fp) != map.size)
433 disorder_fatal(errno, "output");
434 gst_memory_unmap(mem, &map);
438 /* And we're done. */
439 #ifdef HAVE_GSTREAMER_0_10
440 gst_buffer_unref(buf);
442 gst_sample_unref(samp);
447 static GstAppSinkCallbacks callbacks = {
449 .new_preroll = cb_preroll,
450 #ifdef HAVE_GSTREAMER_0_10
451 .new_buffer = cb_buffer
453 .new_sample = cb_buffer
457 /* Decode the audio file. We're already set up for everything. */
458 static void decode(void)
460 GstBus *bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));
462 /* Set up the message bus and main loop. */
463 gst_bus_add_signal_watch(bus);
464 loop = g_main_loop_new(0, FALSE);
465 g_signal_connect(bus, "message", G_CALLBACK(bus_message), 0);
467 /* Tell the sink to call us when interesting things happen. */
468 gst_app_sink_set_max_buffers(appsink, 16);
469 gst_app_sink_set_drop(appsink, FALSE);
470 gst_app_sink_set_callbacks(appsink, &callbacks, 0, 0);
472 /* Set the ball rolling. */
473 gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_PLAYING);
475 /* And wait for the miracle to come. */
476 g_main_loop_run(loop);
478 /* Shut down the pipeline. This isn't strictly necessary, since we're
479 * about to exit very soon, but it's kind of polite.
481 gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_NULL);
484 static int getenum(const char *what, const char *s, const char *const *tags)
488 for(i = 0; tags[i]; i++)
489 if(strcmp(s, tags[i]) == 0) return i;
490 disorder_fatal(0, "unknown %s `%s'", what, s);
493 static double getfloat(const char *what, const char *s)
500 if(*q || errno) disorder_fatal(0, "invalid %s `%s'", what, s);
504 static int getint(const char *what, const char *s, int min, int max)
510 i = strtol(s, &q, 10);
511 if(*q || errno || min > i || i > max)
512 disorder_fatal(0, "invalid %s `%s'", what, s);
516 static const struct option options[] = {
517 { "help", no_argument, 0, 'h' },
518 { "version", no_argument, 0, 'V' },
519 { "config", required_argument, 0, 'c' },
520 { "dither", required_argument, 0, 'd' },
521 { "fallback-gain", required_argument, 0, 'f' },
522 { "noise-shape", required_argument, 0, 'n' },
523 { "quality", required_argument, 0, 'q' },
524 { "replay-gain", required_argument, 0, 'r' },
525 { "stream", no_argument, 0, 's' },
529 static void help(void)
532 " disorder-gstdecode [OPTIONS] PATH\n"
534 " --help, -h Display usage message\n"
535 " --version, -V Display version number\n"
536 " --config PATH, -c PATH Set configuration file\n"
537 " --dither TYPE, -d TYPE TYPE is `none', `rpdf', `tpdf', or "
539 " --fallback-gain DB, -f DB For tracks without ReplayGain data\n"
540 " --noise-shape TYPE, -n TYPE TYPE is `none', `error-feedback',\n"
541 " `simple', `medium' or `high'\n"
542 " --quality QUAL, -q QUAL Resampling quality: 0 poor, 10 good\n"
543 " --replay-gain MODE, -r MODE MODE is `off', `track' or `album'\n"
544 " --stream, -s Output raw samples, without framing\n"
546 "Alternative audio decoder for DisOrder. Only intended to be\n"
547 "used by speaker process, not for normal users.\n");
553 int main(int argc, char *argv[])
560 if(!setlocale(LC_CTYPE, "")) disorder_fatal(errno, "calling setlocale");
562 /* Parse command line. */
563 while((n = getopt_long(argc, argv, "hVc:d:f:n:q:r:s", options, 0)) >= 0) {
566 case 'V': version("disorder-gstdecode");
567 case 'c': configfile = optarg; break;
568 case 'd': dither = getenum("dither type", optarg, dithers); break;
569 case 'f': fallback = getfloat("fallback gain", optarg); break;
570 case 'n': shape = getenum("noise-shaping type", optarg, shapes); break;
571 case 'q': quality = getint("resample quality", optarg, 0, 10); break;
572 case 'r': mode = getenum("ReplayGain mode", optarg, modes); break;
573 case 's': flags |= f_stream; break;
574 default: disorder_fatal(0, "invalid option");
577 if(optind >= argc) disorder_fatal(0, "missing filename");
578 file = argv[optind++];
579 if(optind < argc) disorder_fatal(0, "excess arguments");
580 if(config_read(1, 0)) disorder_fatal(0, "cannot read configuration");
582 /* Set up the GStreamer machinery. */
586 /* Set up the output file. */
587 if((e = getenv("DISORDER_RAW_FD")) != 0) {
588 if((fp = fdopen(atoi(e), "wb")) == 0) disorder_fatal(errno, "fdopen");
595 /* And now we're done. */