1 /* GStreamer ReplayGain volume adjustment
3 * Copyright (C) 2007 Rene Stadler <mail@renestadler.de>
5 * gstrgvolume.c: Element to apply ReplayGain volume adjustment
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public License
9 * as published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
24 * SECTION:element-rgvolume
25 * @see_also: #GstRgLimiter, #GstRgAnalysis
27 * This element applies volume changes to streams as lined out in the proposed
28 * <ulink url="http://replaygain.org">ReplayGain standard</ulink>. It
29 * interprets the ReplayGain meta data tags and carries out the adjustment (by
30 * using a volume element internally). The relevant tags are:
32 * <listitem>#GST_TAG_TRACK_GAIN</listitem>
33 * <listitem>#GST_TAG_TRACK_PEAK</listitem>
34 * <listitem>#GST_TAG_ALBUM_GAIN</listitem>
35 * <listitem>#GST_TAG_ALBUM_PEAK</listitem>
36 * <listitem>#GST_TAG_REFERENCE_LEVEL</listitem>
38 * The information carried by these tags must have been calculated beforehand by
39 * performing the ReplayGain analysis. This is implemented by the <link
40 * linkend="GstRgAnalysis">rganalysis</link> element.
42 * The signal compression/limiting recommendations outlined in the proposed
43 * standard are not implemented by this element. This has to be handled by
44 * separate elements because applications might want to have additional filters
45 * between the volume adjustment and the limiting stage. A basic limiter is
46 * included with this plugin: The <link linkend="GstRgLimiter">rglimiter</link>
47 * element applies -6 dB hard limiting as mentioned in the ReplayGain standard.
50 * <title>Example launch line</title>
52 * gst-launch filesrc location=filename.ext ! decodebin ! audioconvert \
53 * ! rgvolume ! audioconvert ! audioresample ! alsasink
54 * ]| Playback of a file
63 #include <gst/pbutils/pbutils.h>
64 #include <gst/audio/audio.h>
67 #include "gstrgvolume.h"
68 #include "replaygain.h"
70 GST_DEBUG_CATEGORY_STATIC (gst_rg_volume_debug);
71 #define GST_CAT_DEFAULT gst_rg_volume_debug
84 #define DEFAULT_ALBUM_MODE TRUE
85 #define DEFAULT_HEADROOM 0.0
86 #define DEFAULT_PRE_AMP 0.0
87 #define DEFAULT_FALLBACK_GAIN 0.0
89 #define DB_TO_LINEAR(x) pow (10., (x) / 20.)
90 #define LINEAR_TO_DB(x) (20. * log10 (x))
92 #define GAIN_FORMAT "+.02f dB"
93 #define PEAK_FORMAT ".06f"
95 #define VALID_GAIN(x) ((x) > -60.00 && (x) < 60.00)
96 #define VALID_PEAK(x) ((x) > 0.)
98 /* Same template caps as GstVolume, for I don't like having just ANY caps. */
100 #define FORMAT "{ "GST_AUDIO_NE(F32)","GST_AUDIO_NE(S16)" }"
102 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
105 GST_STATIC_CAPS ("audio/x-raw, "
106 "format = (string) " FORMAT ", "
107 "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, MAX ]"));
109 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
112 GST_STATIC_CAPS ("audio/x-raw, "
113 "format = (string) " FORMAT ", "
114 "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, MAX ]"));
116 #define gst_rg_volume_parent_class parent_class
117 G_DEFINE_TYPE (GstRgVolume, gst_rg_volume, GST_TYPE_BIN);
119 static void gst_rg_volume_set_property (GObject * object, guint prop_id,
120 const GValue * value, GParamSpec * pspec);
121 static void gst_rg_volume_get_property (GObject * object, guint prop_id,
122 GValue * value, GParamSpec * pspec);
123 static void gst_rg_volume_dispose (GObject * object);
125 static GstStateChangeReturn gst_rg_volume_change_state (GstElement * element,
126 GstStateChange transition);
127 static gboolean gst_rg_volume_sink_event (GstPad * pad, GstEvent * event);
129 static GstEvent *gst_rg_volume_tag_event (GstRgVolume * self, GstEvent * event);
130 static void gst_rg_volume_reset (GstRgVolume * self);
131 static void gst_rg_volume_update_gain (GstRgVolume * self);
132 static inline void gst_rg_volume_determine_gain (GstRgVolume * self,
133 gdouble * target_gain, gdouble * result_gain);
136 gst_rg_volume_class_init (GstRgVolumeClass * klass)
138 GObjectClass *gobject_class;
139 GstElementClass *element_class;
140 GstBinClass *bin_class;
142 gobject_class = (GObjectClass *) klass;
144 gobject_class->set_property = gst_rg_volume_set_property;
145 gobject_class->get_property = gst_rg_volume_get_property;
146 gobject_class->dispose = gst_rg_volume_dispose;
149 * GstRgVolume:album-mode:
151 * Whether to prefer album gain over track gain.
153 * If set to %TRUE, use album gain instead of track gain if both are
154 * available. This keeps the relative loudness levels of tracks from the same
157 * If set to %FALSE, track mode is used instead. This effectively leads to
158 * more extensive normalization.
160 * If album mode is enabled but the album gain tag is absent in the stream,
161 * the track gain is used instead. If both gain tags are missing, the value
162 * of the <link linkend="GstRgVolume--fallback-gain">fallback-gain</link>
163 * property is used instead.
165 g_object_class_install_property (gobject_class, PROP_ALBUM_MODE,
166 g_param_spec_boolean ("album-mode", "Album mode",
167 "Prefer album over track gain", DEFAULT_ALBUM_MODE,
168 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
170 * GstRgVolume:headroom:
172 * Extra headroom [dB]. This controls the amount by which the output can
173 * exceed digital full scale.
175 * Only set this to a value greater than 0.0 if signal compression/limiting of
176 * a suitable form is applied to the output (or output is brought into the
177 * correct range by some other transformation).
179 * This element internally uses a volume element, which also supports
180 * operating on integer audio formats. These formats do not allow exceeding
181 * digital full scale. If extra headroom is used, make sure that the raw
182 * audio data format is floating point (F32). Otherwise,
183 * clipping distortion might be introduced as part of the volume adjustment
186 g_object_class_install_property (gobject_class, PROP_HEADROOM,
187 g_param_spec_double ("headroom", "Headroom", "Extra headroom [dB]",
188 0., 60., DEFAULT_HEADROOM,
189 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
191 * GstRgVolume:pre-amp:
193 * Additional gain to apply globally [dB]. This controls the trade-off
194 * between uniformity of normalization and utilization of available dynamic
197 * Note that the default value is 0 dB because the ReplayGain reference value
198 * was adjusted by +6 dB (from 83 to 89 dB). At the time of this writing, the
199 * <ulink url="http://replaygain.org">webpage</ulink> is still outdated and
200 * does not reflect this change however. Where the original proposal states
201 * that a proper default pre-amp value is +6 dB, this translates to the used 0
204 g_object_class_install_property (gobject_class, PROP_PRE_AMP,
205 g_param_spec_double ("pre-amp", "Pre-amp", "Extra gain [dB]",
206 -60., 60., DEFAULT_PRE_AMP,
207 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
209 * GstRgVolume:fallback-gain:
211 * Fallback gain [dB] for streams missing ReplayGain tags.
213 g_object_class_install_property (gobject_class, PROP_FALLBACK_GAIN,
214 g_param_spec_double ("fallback-gain", "Fallback gain",
215 "Gain for streams missing tags [dB]",
216 -60., 60., DEFAULT_FALLBACK_GAIN,
217 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
219 * GstRgVolume:result-gain:
221 * Applied gain [dB]. This gain is applied to processed buffer data.
223 * This is set to the <link linkend="GstRgVolume--target-gain">target
224 * gain</link> if amplification by that amount can be applied safely.
225 * "Safely" means that the volume adjustment does not inflict clipping
226 * distortion. Should this not be the case, the result gain is set to an
227 * appropriately reduced value (by applying peak normalization). The proposed
228 * standard calls this "clipping prevention".
230 * The difference between target and result gain reflects the necessary amount
231 * of reduction. Applications can make use of this information to temporarily
232 * reduce the <link linkend="GstRgVolume--pre-amp">pre-amp</link> for
233 * subsequent streams, as recommended by the ReplayGain standard.
235 * Note that target and result gain differing for a great majority of streams
236 * indicates a problem: What happens in this case is that most streams receive
237 * peak normalization instead of amplification by the ideal replay gain. To
238 * prevent this, the <link linkend="GstRgVolume--pre-amp">pre-amp</link> has
239 * to be lowered and/or a limiter has to be used which facilitates the use of
240 * <link linkend="GstRgVolume--headroom">headroom</link>.
242 g_object_class_install_property (gobject_class, PROP_RESULT_GAIN,
243 g_param_spec_double ("result-gain", "Result-gain", "Applied gain [dB]",
244 -120., 120., 0., G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
246 * GstRgVolume:target-gain:
248 * Applicable gain [dB]. This gain is supposed to be applied.
250 * Depending on the value of the <link
251 * linkend="GstRgVolume--album-mode">album-mode</link> property and the
252 * presence of ReplayGain tags in the stream, this is set according to one of
253 * these simple formulas:
256 * <listitem><link linkend="GstRgVolume--pre-amp">pre-amp</link> + album gain
257 * of the stream</listitem>
258 * <listitem><link linkend="GstRgVolume--pre-amp">pre-amp</link> + track gain
259 * of the stream</listitem>
260 * <listitem><link linkend="GstRgVolume--pre-amp">pre-amp</link> + <link
261 * linkend="GstRgVolume--fallback-gain">fallback gain</link></listitem>
264 g_object_class_install_property (gobject_class, PROP_TARGET_GAIN,
265 g_param_spec_double ("target-gain", "Target-gain",
266 "Applicable gain [dB]", -120., 120., 0.,
267 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
269 element_class = (GstElementClass *) klass;
270 element_class->change_state = GST_DEBUG_FUNCPTR (gst_rg_volume_change_state);
272 bin_class = (GstBinClass *) klass;
273 /* Setting these to NULL makes gst_bin_add and _remove refuse to let anyone
274 * mess with our internals. */
275 bin_class->add_element = NULL;
276 bin_class->remove_element = NULL;
278 gst_element_class_add_pad_template (element_class,
279 gst_static_pad_template_get (&src_template));
280 gst_element_class_add_pad_template (element_class,
281 gst_static_pad_template_get (&sink_template));
282 gst_element_class_set_details_simple (element_class, "ReplayGain volume",
283 "Filter/Effect/Audio",
284 "Apply ReplayGain volume adjustment",
285 "Ren\xc3\xa9 Stadler <mail@renestadler.de>");
287 GST_DEBUG_CATEGORY_INIT (gst_rg_volume_debug, "rgvolume", 0,
288 "ReplayGain volume element");
292 gst_rg_volume_init (GstRgVolume * self)
294 GObjectClass *volume_class;
295 GstPad *volume_pad, *ghost_pad;
297 self->album_mode = DEFAULT_ALBUM_MODE;
298 self->headroom = DEFAULT_HEADROOM;
299 self->pre_amp = DEFAULT_PRE_AMP;
300 self->fallback_gain = DEFAULT_FALLBACK_GAIN;
301 self->target_gain = 0.0;
302 self->result_gain = 0.0;
304 self->volume_element = gst_element_factory_make ("volume", "rgvolume-volume");
305 if (G_UNLIKELY (self->volume_element == NULL)) {
308 GST_WARNING_OBJECT (self, "could not create volume element");
309 msg = gst_missing_element_message_new (GST_ELEMENT_CAST (self), "volume");
310 gst_element_post_message (GST_ELEMENT_CAST (self), msg);
312 /* Nothing else to do, we will refuse the state change from NULL to READY to
313 * indicate that something went very wrong. It is doubtful that someone
314 * attempts changing our state though, since we end up having no pads! */
318 volume_class = G_OBJECT_GET_CLASS (G_OBJECT (self->volume_element));
319 self->max_volume = G_PARAM_SPEC_DOUBLE
320 (g_object_class_find_property (volume_class, "volume"))->maximum;
322 GST_BIN_CLASS (parent_class)->add_element (GST_BIN_CAST (self),
323 self->volume_element);
325 volume_pad = gst_element_get_static_pad (self->volume_element, "sink");
326 ghost_pad = gst_ghost_pad_new_from_template ("sink", volume_pad,
327 gst_pad_get_pad_template (volume_pad));
328 gst_object_unref (volume_pad);
329 gst_pad_set_event_function (ghost_pad, gst_rg_volume_sink_event);
330 gst_element_add_pad (GST_ELEMENT_CAST (self), ghost_pad);
332 volume_pad = gst_element_get_static_pad (self->volume_element, "src");
333 ghost_pad = gst_ghost_pad_new_from_template ("src", volume_pad,
334 gst_pad_get_pad_template (volume_pad));
335 gst_object_unref (volume_pad);
336 gst_element_add_pad (GST_ELEMENT_CAST (self), ghost_pad);
340 gst_rg_volume_set_property (GObject * object, guint prop_id,
341 const GValue * value, GParamSpec * pspec)
343 GstRgVolume *self = GST_RG_VOLUME (object);
346 case PROP_ALBUM_MODE:
347 self->album_mode = g_value_get_boolean (value);
350 self->headroom = g_value_get_double (value);
353 self->pre_amp = g_value_get_double (value);
355 case PROP_FALLBACK_GAIN:
356 self->fallback_gain = g_value_get_double (value);
359 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
363 gst_rg_volume_update_gain (self);
367 gst_rg_volume_get_property (GObject * object, guint prop_id,
368 GValue * value, GParamSpec * pspec)
370 GstRgVolume *self = GST_RG_VOLUME (object);
373 case PROP_ALBUM_MODE:
374 g_value_set_boolean (value, self->album_mode);
377 g_value_set_double (value, self->headroom);
380 g_value_set_double (value, self->pre_amp);
382 case PROP_FALLBACK_GAIN:
383 g_value_set_double (value, self->fallback_gain);
385 case PROP_TARGET_GAIN:
386 g_value_set_double (value, self->target_gain);
388 case PROP_RESULT_GAIN:
389 g_value_set_double (value, self->result_gain);
392 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
398 gst_rg_volume_dispose (GObject * object)
400 GstRgVolume *self = GST_RG_VOLUME (object);
402 if (self->volume_element != NULL) {
403 /* Manually remove our child using the bin implementation of remove_element.
404 * This is needed because we prevent gst_bin_remove from working, which the
405 * parent dispose handler would use if we had any children left. */
406 GST_BIN_CLASS (parent_class)->remove_element (GST_BIN_CAST (self),
407 self->volume_element);
408 self->volume_element = NULL;
411 G_OBJECT_CLASS (parent_class)->dispose (object);
414 static GstStateChangeReturn
415 gst_rg_volume_change_state (GstElement * element, GstStateChange transition)
417 GstRgVolume *self = GST_RG_VOLUME (element);
418 GstStateChangeReturn res;
420 switch (transition) {
421 case GST_STATE_CHANGE_NULL_TO_READY:
423 if (G_UNLIKELY (self->volume_element == NULL)) {
424 /* Creating our child volume element in _init failed. */
425 return GST_STATE_CHANGE_FAILURE;
429 case GST_STATE_CHANGE_READY_TO_PAUSED:
431 gst_rg_volume_reset (self);
438 res = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
443 /* Event function for the ghost sink pad. */
445 gst_rg_volume_sink_event (GstPad * pad, GstEvent * event)
448 GstPad *volume_sink_pad;
449 GstEvent *send_event = event;
452 self = GST_RG_VOLUME (gst_pad_get_parent_element (pad));
453 volume_sink_pad = gst_ghost_pad_get_target (GST_GHOST_PAD (pad));
455 switch (GST_EVENT_TYPE (event)) {
458 GST_LOG_OBJECT (self, "received tag event");
460 send_event = gst_rg_volume_tag_event (self, event);
462 if (send_event == NULL)
463 GST_LOG_OBJECT (self, "all tags handled, dropping event");
469 gst_rg_volume_reset (self);
476 if (G_LIKELY (send_event != NULL))
477 res = gst_pad_send_event (volume_sink_pad, send_event);
481 gst_object_unref (volume_sink_pad);
482 gst_object_unref (self);
487 gst_rg_volume_tag_event (GstRgVolume * self, GstEvent * event)
489 GstTagList *tag_list;
490 gboolean has_track_gain, has_track_peak, has_album_gain, has_album_peak;
491 gboolean has_ref_level;
493 g_return_val_if_fail (event != NULL, NULL);
494 g_return_val_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_TAG, event);
496 gst_event_parse_tag (event, &tag_list);
498 if (gst_tag_list_is_empty (tag_list))
501 has_track_gain = gst_tag_list_get_double (tag_list, GST_TAG_TRACK_GAIN,
503 has_track_peak = gst_tag_list_get_double (tag_list, GST_TAG_TRACK_PEAK,
505 has_album_gain = gst_tag_list_get_double (tag_list, GST_TAG_ALBUM_GAIN,
507 has_album_peak = gst_tag_list_get_double (tag_list, GST_TAG_ALBUM_PEAK,
509 has_ref_level = gst_tag_list_get_double (tag_list, GST_TAG_REFERENCE_LEVEL,
510 &self->reference_level);
512 if (!has_track_gain && !has_track_peak && !has_album_gain && !has_album_peak)
515 if (has_ref_level && (has_track_gain || has_album_gain)
516 && (ABS (self->reference_level - RG_REFERENCE_LEVEL) > 1.e-6)) {
517 /* Log a message stating the amount of adjustment that is applied below. */
518 GST_DEBUG_OBJECT (self,
519 "compensating for reference level difference by %" GAIN_FORMAT,
520 RG_REFERENCE_LEVEL - self->reference_level);
522 if (has_track_gain) {
523 self->track_gain += RG_REFERENCE_LEVEL - self->reference_level;
525 if (has_album_gain) {
526 self->album_gain += RG_REFERENCE_LEVEL - self->reference_level;
529 /* Ignore values that are obviously invalid. */
530 if (G_UNLIKELY (has_track_gain && !VALID_GAIN (self->track_gain))) {
531 GST_DEBUG_OBJECT (self,
532 "ignoring bogus track gain value %" GAIN_FORMAT, self->track_gain);
533 has_track_gain = FALSE;
535 if (G_UNLIKELY (has_track_peak && !VALID_PEAK (self->track_peak))) {
536 GST_DEBUG_OBJECT (self,
537 "ignoring bogus track peak value %" PEAK_FORMAT, self->track_peak);
538 has_track_peak = FALSE;
540 if (G_UNLIKELY (has_album_gain && !VALID_GAIN (self->album_gain))) {
541 GST_DEBUG_OBJECT (self,
542 "ignoring bogus album gain value %" GAIN_FORMAT, self->album_gain);
543 has_album_gain = FALSE;
545 if (G_UNLIKELY (has_album_peak && !VALID_PEAK (self->album_peak))) {
546 GST_DEBUG_OBJECT (self,
547 "ignoring bogus album peak value %" PEAK_FORMAT, self->album_peak);
548 has_album_peak = FALSE;
551 /* Clamp peaks >1.0. Float based decoders can produce spurious samples >1.0,
552 * cutting these files back to 1.0 should not cause any audible distortion.
553 * This is most often seen with Vorbis files. */
554 if (has_track_peak && self->track_peak > 1.) {
555 GST_DEBUG_OBJECT (self,
556 "clamping track peak %" PEAK_FORMAT " to 1.0", self->track_peak);
557 self->track_peak = 1.0;
559 if (has_album_peak && self->album_peak > 1.) {
560 GST_DEBUG_OBJECT (self,
561 "clamping album peak %" PEAK_FORMAT " to 1.0", self->album_peak);
562 self->album_peak = 1.0;
565 self->has_track_gain |= has_track_gain;
566 self->has_track_peak |= has_track_peak;
567 self->has_album_gain |= has_album_gain;
568 self->has_album_peak |= has_album_peak;
570 event = (GstEvent *) gst_mini_object_make_writable (GST_MINI_OBJECT (event));
571 gst_event_parse_tag (event, &tag_list);
573 gst_tag_list_remove_tag (tag_list, GST_TAG_TRACK_GAIN);
574 gst_tag_list_remove_tag (tag_list, GST_TAG_TRACK_PEAK);
575 gst_tag_list_remove_tag (tag_list, GST_TAG_ALBUM_GAIN);
576 gst_tag_list_remove_tag (tag_list, GST_TAG_ALBUM_PEAK);
577 gst_tag_list_remove_tag (tag_list, GST_TAG_REFERENCE_LEVEL);
579 gst_rg_volume_update_gain (self);
581 if (gst_tag_list_is_empty (tag_list)) {
582 gst_event_unref (event);
590 gst_rg_volume_reset (GstRgVolume * self)
592 self->has_track_gain = FALSE;
593 self->has_track_peak = FALSE;
594 self->has_album_gain = FALSE;
595 self->has_album_peak = FALSE;
597 self->reference_level = RG_REFERENCE_LEVEL;
599 gst_rg_volume_update_gain (self);
603 gst_rg_volume_update_gain (GstRgVolume * self)
605 gdouble target_gain, result_gain, result_volume;
606 gboolean target_gain_changed, result_gain_changed;
608 gst_rg_volume_determine_gain (self, &target_gain, &result_gain);
610 result_volume = DB_TO_LINEAR (result_gain);
612 /* Ensure that the result volume is within the range that the volume element
613 * can handle. Currently, the limit is 10. (+20 dB), which should not be
615 if (G_UNLIKELY (result_volume > self->max_volume)) {
616 GST_INFO_OBJECT (self,
617 "cannot handle result gain of %" GAIN_FORMAT " (%0.6f), adjusting",
618 result_gain, result_volume);
620 result_volume = self->max_volume;
621 result_gain = LINEAR_TO_DB (result_volume);
624 /* Direct comparison is OK in this case. */
625 if (target_gain == result_gain) {
626 GST_INFO_OBJECT (self,
627 "result gain is %" GAIN_FORMAT " (%0.6f), matching target",
628 result_gain, result_volume);
630 GST_INFO_OBJECT (self,
631 "result gain is %" GAIN_FORMAT " (%0.6f), target is %" GAIN_FORMAT,
632 result_gain, result_volume, target_gain);
635 target_gain_changed = (self->target_gain != target_gain);
636 result_gain_changed = (self->result_gain != result_gain);
638 self->target_gain = target_gain;
639 self->result_gain = result_gain;
641 g_object_set (self->volume_element, "volume", result_volume, NULL);
643 if (target_gain_changed)
644 g_object_notify ((GObject *) self, "target-gain");
645 if (result_gain_changed)
646 g_object_notify ((GObject *) self, "result-gain");
650 gst_rg_volume_determine_gain (GstRgVolume * self, gdouble * target_gain,
651 gdouble * result_gain)
655 if (!self->has_track_gain && !self->has_album_gain) {
657 GST_DEBUG_OBJECT (self, "using fallback gain");
658 gain = self->fallback_gain;
661 } else if ((self->album_mode && self->has_album_gain)
662 || (!self->album_mode && !self->has_track_gain)) {
664 gain = self->album_gain;
665 if (G_LIKELY (self->has_album_peak)) {
666 peak = self->album_peak;
668 GST_DEBUG_OBJECT (self, "album peak missing, assuming 1.0");
671 /* Falling back from track to album gain shouldn't really happen. */
672 if (G_UNLIKELY (!self->album_mode))
673 GST_INFO_OBJECT (self, "falling back to album gain");
676 /* !album_mode && !has_album_gain || album_mode && has_track_gain */
678 gain = self->track_gain;
679 if (G_LIKELY (self->has_track_peak)) {
680 peak = self->track_peak;
682 GST_DEBUG_OBJECT (self, "track peak missing, assuming 1.0");
685 if (self->album_mode)
686 GST_INFO_OBJECT (self, "falling back to track gain");
689 gain += self->pre_amp;
694 if (LINEAR_TO_DB (peak) + gain > self->headroom) {
695 *result_gain = LINEAR_TO_DB (1. / peak) + self->headroom;