mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-09 05:38:58 +00:00
266 lines
7.6 KiB
C++
266 lines
7.6 KiB
C++
/* GStreamer
|
|
* Copyright (C) 2008 Sebastian Dröge <slomo@circular-chaos.org>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
/* FIXME: workaround for SoundTouch.h of version 1.3.1 defining those
|
|
* variables while it shouldn't. */
|
|
#undef VERSION
|
|
#undef PACKAGE_VERSION
|
|
#undef PACKAGE_TARNAME
|
|
#undef PACKAGE_STRING
|
|
#undef PACKAGE_NAME
|
|
#undef PACKAGE_BUGREPORT
|
|
#undef PACKAGE
|
|
|
|
#include <soundtouch/BPMDetect.h>
|
|
|
|
#include <gst/audio/audio.h>
|
|
#include <gst/audio/gstaudiofilter.h>
|
|
#include <math.h>
|
|
#include <string.h>
|
|
#include "gstbpmdetect.hh"
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (gst_bpm_detect_debug);
|
|
#define GST_CAT_DEFAULT gst_bpm_detect_debug
|
|
|
|
#define GST_BPM_DETECT_GET_PRIVATE(o) (o->priv)
|
|
|
|
struct _GstBPMDetectPrivate
|
|
{
|
|
gfloat bpm;
|
|
#ifdef HAVE_SOUNDTOUCH_1_4
|
|
soundtouch::BPMDetect * detect;
|
|
#else
|
|
BPMDetect *detect;
|
|
#endif
|
|
};
|
|
|
|
/* For soundtouch 1.4 */
|
|
#if defined(INTEGER_SAMPLES)
|
|
#define SOUNDTOUCH_INTEGER_SAMPLES 1
|
|
#elif defined(FLOAT_SAMPLES)
|
|
#define SOUNDTOUCH_FLOAT_SAMPLES 1
|
|
#endif
|
|
|
|
#if defined(SOUNDTOUCH_FLOAT_SAMPLES)
|
|
#define ALLOWED_CAPS \
|
|
"audio/x-raw, " \
|
|
"format = (string) " GST_AUDIO_NE (F32) ", " \
|
|
"rate = (int) [ 8000, MAX ], " \
|
|
"channels = (int) [ 1, 2 ]"
|
|
#elif defined(SOUNDTOUCH_INTEGER_SAMPLES)
|
|
#define ALLOWED_CAPS \
|
|
"audio/x-raw, " \
|
|
"format = (string) " GST_AUDIO_NE (S16) ", " \
|
|
"rate = (int) [ 8000, MAX ], " \
|
|
"channels = (int) [ 1, 2 ]"
|
|
#else
|
|
#error "Only integer or float samples are supported"
|
|
#endif
|
|
|
|
#define gst_bpm_detect_parent_class parent_class
|
|
G_DEFINE_TYPE_WITH_PRIVATE (GstBPMDetect, gst_bpm_detect, GST_TYPE_AUDIO_FILTER);
|
|
|
|
static void gst_bpm_detect_finalize (GObject * object);
|
|
static gboolean gst_bpm_detect_stop (GstBaseTransform * trans);
|
|
static gboolean gst_bpm_detect_event (GstBaseTransform * trans,
|
|
GstEvent * event);
|
|
static GstFlowReturn gst_bpm_detect_transform_ip (GstBaseTransform * trans,
|
|
GstBuffer * in);
|
|
static gboolean gst_bpm_detect_setup (GstAudioFilter * filter,
|
|
const GstAudioInfo * info);
|
|
|
|
static void
|
|
gst_bpm_detect_class_init (GstBPMDetectClass * klass)
|
|
{
|
|
GstCaps *caps;
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
|
GstBaseTransformClass *trans_class = GST_BASE_TRANSFORM_CLASS (klass);
|
|
GstAudioFilterClass *filter_class = GST_AUDIO_FILTER_CLASS (klass);
|
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_bpm_detect_debug, "bpm_detect", 0,
|
|
"audio bpm detection element");
|
|
|
|
gobject_class->finalize = gst_bpm_detect_finalize;
|
|
|
|
gst_element_class_set_static_metadata (element_class, "BPM Detector",
|
|
"Filter/Analyzer/Audio", "Detect the BPM of an audio stream",
|
|
"Sebastian Dröge <slomo@circular-chaos.org>");
|
|
|
|
caps = gst_caps_from_string (ALLOWED_CAPS);
|
|
gst_audio_filter_class_add_pad_templates (GST_AUDIO_FILTER_CLASS (klass),
|
|
caps);
|
|
gst_caps_unref (caps);
|
|
|
|
trans_class->stop = GST_DEBUG_FUNCPTR (gst_bpm_detect_stop);
|
|
trans_class->sink_event = GST_DEBUG_FUNCPTR (gst_bpm_detect_event);
|
|
trans_class->transform_ip = GST_DEBUG_FUNCPTR (gst_bpm_detect_transform_ip);
|
|
trans_class->passthrough_on_same_caps = TRUE;
|
|
|
|
filter_class->setup = GST_DEBUG_FUNCPTR (gst_bpm_detect_setup);
|
|
}
|
|
|
|
static void
|
|
gst_bpm_detect_init (GstBPMDetect * bpm_detect)
|
|
{
|
|
bpm_detect->priv =
|
|
(GstBPMDetectPrivate *) gst_bpm_detect_get_instance_private (bpm_detect);
|
|
bpm_detect->priv->detect = NULL;
|
|
bpm_detect->bpm = 0.0;
|
|
}
|
|
|
|
static void
|
|
gst_bpm_detect_finalize (GObject * object)
|
|
{
|
|
GstBPMDetect *bpm_detect = GST_BPM_DETECT (object);
|
|
|
|
if (bpm_detect->priv->detect) {
|
|
delete bpm_detect->priv->detect;
|
|
|
|
bpm_detect->priv->detect = NULL;
|
|
}
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static gboolean
|
|
gst_bpm_detect_stop (GstBaseTransform * trans)
|
|
{
|
|
GstBPMDetect *bpm_detect = GST_BPM_DETECT (trans);
|
|
|
|
if (bpm_detect->priv->detect) {
|
|
delete bpm_detect->priv->detect;
|
|
|
|
bpm_detect->priv->detect = NULL;
|
|
}
|
|
bpm_detect->bpm = 0.0;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_bpm_detect_event (GstBaseTransform * trans, GstEvent * event)
|
|
{
|
|
GstBPMDetect *bpm_detect = GST_BPM_DETECT (trans);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_STOP:
|
|
case GST_EVENT_EOS:
|
|
case GST_EVENT_SEGMENT:
|
|
if (bpm_detect->priv->detect) {
|
|
delete bpm_detect->priv->detect;
|
|
|
|
bpm_detect->priv->detect = NULL;
|
|
}
|
|
bpm_detect->bpm = 0.0;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
|
|
}
|
|
|
|
static gboolean
|
|
gst_bpm_detect_setup (GstAudioFilter * filter, const GstAudioInfo * info)
|
|
{
|
|
GstBPMDetect *bpm_detect = GST_BPM_DETECT (filter);
|
|
|
|
if (bpm_detect->priv->detect) {
|
|
delete bpm_detect->priv->detect;
|
|
|
|
bpm_detect->priv->detect = NULL;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_bpm_detect_transform_ip (GstBaseTransform * trans, GstBuffer * in)
|
|
{
|
|
GstBPMDetect *bpm_detect = GST_BPM_DETECT (trans);
|
|
GstAudioFilter *filter = GST_AUDIO_FILTER (trans);
|
|
gint nsamples;
|
|
gfloat bpm;
|
|
GstMapInfo info;
|
|
|
|
if (G_UNLIKELY (!bpm_detect->priv->detect)) {
|
|
if (GST_AUDIO_INFO_FORMAT (&filter->info) == GST_AUDIO_FORMAT_UNKNOWN) {
|
|
GST_ERROR_OBJECT (bpm_detect, "No channels or rate set yet");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
#ifdef HAVE_SOUNDTOUCH_1_4
|
|
bpm_detect->priv->detect =
|
|
new soundtouch::BPMDetect (GST_AUDIO_INFO_CHANNELS (&filter->info),
|
|
GST_AUDIO_INFO_RATE (&filter->info));
|
|
#else
|
|
bpm_detect->priv->detect =
|
|
new BPMDetect (GST_AUDIO_INFO_CHANNELS (&filter->info),
|
|
GST_AUDIO_INFO_RATE (&filter->info));
|
|
#endif
|
|
}
|
|
|
|
gst_buffer_map (in, &info, GST_MAP_READ);
|
|
|
|
nsamples = info.size / (GST_AUDIO_INFO_BPF (&filter->info) * GST_AUDIO_INFO_CHANNELS (&filter->info));
|
|
|
|
/* For stereo BPMDetect->inputSamples() does downmixing into the input
|
|
* data but our buffer data shouldn't be modified.
|
|
*/
|
|
if (GST_AUDIO_INFO_CHANNELS (&filter->info) == 1) {
|
|
soundtouch::SAMPLETYPE *inbuf = (soundtouch::SAMPLETYPE *) info.data;
|
|
|
|
while (nsamples > 0) {
|
|
bpm_detect->priv->detect->inputSamples (inbuf, MIN (nsamples, 2048));
|
|
nsamples -= 2048;
|
|
inbuf += 2048;
|
|
}
|
|
} else {
|
|
soundtouch::SAMPLETYPE *inbuf, *intmp, data[2 * 2048];
|
|
|
|
inbuf = (soundtouch::SAMPLETYPE *) info.data;
|
|
intmp = data;
|
|
|
|
while (nsamples > 0) {
|
|
memcpy (intmp, inbuf, sizeof (soundtouch::SAMPLETYPE) * 2 * MIN (nsamples, 2048));
|
|
bpm_detect->priv->detect->inputSamples (intmp, MIN (nsamples, 2048));
|
|
nsamples -= 2048;
|
|
inbuf += 2048 * 2;
|
|
}
|
|
}
|
|
gst_buffer_unmap (in, &info);
|
|
|
|
bpm = bpm_detect->priv->detect->getBpm ();
|
|
if (bpm >= 1.0 && fabs (bpm_detect->bpm - bpm) >= 1.0) {
|
|
GstTagList *tags = gst_tag_list_new_empty ();
|
|
|
|
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE_ALL, GST_TAG_BEATS_PER_MINUTE,
|
|
bpm, (void *) NULL);
|
|
gst_pad_push_event (trans->srcpad, gst_event_new_tag (tags));
|
|
|
|
GST_INFO_OBJECT (bpm_detect, "Detected BPM: %lf", bpm);
|
|
bpm_detect->bpm = bpm;
|
|
}
|
|
|
|
return GST_FLOW_OK;
|
|
}
|