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gstreamer/gst/audioresample/gstaudioresample.c
Tim-Philipp Müller 5f59b4f7ee Fix FSF address 
https://bugzilla.gnome.org/show_bug.cgi?id=687520
2012-11-03 23:05:09 +00:00

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/* GStreamer
* Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2003,2004 David A. Schleef <ds@schleef.org>
* Copyright (C) 2007-2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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.
*/
/**
* SECTION:element-audioresample
*
* audioresample resamples raw audio buffers to different sample rates using
* a configurable windowing function to enhance quality.
*
* By default, the resampler uses a reduced sinc table, with cubic interpolation filling in
* the gaps. This ensures that the table does not become too big. However, the interpolation
* increases the CPU usage considerably. As an alternative, a full sinc table can be used.
* Doing so can drastically reduce CPU usage (4x faster with 44.1 -> 48 kHz conversions for
* example), at the cost of increased memory consumption, plus the sinc table takes longer
* to initialize when the element is created. A third mode exists, which uses the full table
* unless said table would become too large, in which case the interpolated one is used instead.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v filesrc location=sine.ogg ! oggdemux ! vorbisdec ! audioconvert ! audioresample ! audio/x-raw, rate=8000 ! alsasink
* ]| Decode an Ogg/Vorbis downsample to 8Khz and play sound through alsa.
* To create the Ogg/Vorbis file refer to the documentation of vorbisenc.
* </refsect2>
*/
/* TODO:
* - Enable SSE/ARM optimizations and select at runtime
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <math.h>
#include "gstaudioresample.h"
#include <gst/gstutils.h>
#include <gst/audio/audio.h>
#include <gst/base/gstbasetransform.h>
#ifndef DISABLE_ORC
#include <orc/orc.h>
#include <orc-test/orctest.h>
#include <orc-test/orcprofile.h>
#endif
GST_DEBUG_CATEGORY (audio_resample_debug);
#define GST_CAT_DEFAULT audio_resample_debug
#if !defined(AUDIORESAMPLE_FORMAT_AUTO) || defined(DISABLE_ORC)
GST_DEBUG_CATEGORY_STATIC (GST_CAT_PERFORMANCE);
#endif
#define GST_TYPE_SPEEX_RESAMPLER_SINC_FILTER_MODE (speex_resampler_sinc_filter_mode_get_type ())
enum
{
PROP_0,
PROP_QUALITY,
PROP_SINC_FILTER_MODE,
PROP_SINC_FILTER_AUTO_THRESHOLD
};
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
#define SUPPORTED_CAPS \
GST_AUDIO_CAPS_MAKE ("{ F32LE, F64LE, S32LE, S24LE, S16LE, S8 }") \
", layout = (string) { interleaved, non-interleaved }"
#else
#define SUPPORTED_CAPS \
GST_AUDIO_CAPS_MAKE ("{ F32BE, F64BE, S32BE, S24BE, S16BE, S8 }") \
", layout = (string) { interleaved, non-interleaved }"
#endif
/* If TRUE integer arithmetic resampling is faster and will be used if appropriate */
#if defined AUDIORESAMPLE_FORMAT_INT
static gboolean gst_audio_resample_use_int = TRUE;
#elif defined AUDIORESAMPLE_FORMAT_FLOAT
static gboolean gst_audio_resample_use_int = FALSE;
#else
static gboolean gst_audio_resample_use_int = FALSE;
#endif
static GstStaticPadTemplate gst_audio_resample_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (SUPPORTED_CAPS));
static GstStaticPadTemplate gst_audio_resample_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (SUPPORTED_CAPS));
static void gst_audio_resample_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_audio_resample_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GType
speex_resampler_sinc_filter_mode_get_type (void);
/* vmethods */
static gboolean gst_audio_resample_get_unit_size (GstBaseTransform * base,
GstCaps * caps, gsize * size);
static GstCaps *gst_audio_resample_transform_caps (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps, GstCaps * filter);
static GstCaps *gst_audio_resample_fixate_caps (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
static gboolean gst_audio_resample_transform_size (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * incaps, gsize insize,
GstCaps * outcaps, gsize * outsize);
static gboolean gst_audio_resample_set_caps (GstBaseTransform * base,
GstCaps * incaps, GstCaps * outcaps);
static GstFlowReturn gst_audio_resample_transform (GstBaseTransform * base,
GstBuffer * inbuf, GstBuffer * outbuf);
static gboolean gst_audio_resample_sink_event (GstBaseTransform * base,
GstEvent * event);
static gboolean gst_audio_resample_start (GstBaseTransform * base);
static gboolean gst_audio_resample_stop (GstBaseTransform * base);
static gboolean gst_audio_resample_query (GstPad * pad, GstObject * parent,
GstQuery * query);
#define gst_audio_resample_parent_class parent_class
G_DEFINE_TYPE (GstAudioResample, gst_audio_resample, GST_TYPE_BASE_TRANSFORM);
static void
gst_audio_resample_class_init (GstAudioResampleClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
gobject_class->set_property = gst_audio_resample_set_property;
gobject_class->get_property = gst_audio_resample_get_property;
g_object_class_install_property (gobject_class, PROP_QUALITY,
g_param_spec_int ("quality", "Quality", "Resample quality with 0 being "
"the lowest and 10 being the best",
SPEEX_RESAMPLER_QUALITY_MIN, SPEEX_RESAMPLER_QUALITY_MAX,
SPEEX_RESAMPLER_QUALITY_DEFAULT,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SINC_FILTER_MODE,
g_param_spec_enum ("sinc-filter-mode", "Sinc filter table mode",
"What sinc filter table mode to use",
GST_TYPE_SPEEX_RESAMPLER_SINC_FILTER_MODE,
SPEEX_RESAMPLER_SINC_FILTER_DEFAULT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SINC_FILTER_AUTO_THRESHOLD,
g_param_spec_uint ("sinc-filter-auto-threshold", "Sinc filter auto mode threshold",
"Memory usage threshold to use if sinc filter mode is AUTO, given in bytes",
0, G_MAXUINT,
SPEEX_RESAMPLER_SINC_FILTER_AUTO_THRESHOLD_DEFAULT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_audio_resample_src_template));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_audio_resample_sink_template));
gst_element_class_set_static_metadata (gstelement_class, "Audio resampler",
"Filter/Converter/Audio", "Resamples audio",
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
GST_BASE_TRANSFORM_CLASS (klass)->start =
GST_DEBUG_FUNCPTR (gst_audio_resample_start);
GST_BASE_TRANSFORM_CLASS (klass)->stop =
GST_DEBUG_FUNCPTR (gst_audio_resample_stop);
GST_BASE_TRANSFORM_CLASS (klass)->transform_size =
GST_DEBUG_FUNCPTR (gst_audio_resample_transform_size);
GST_BASE_TRANSFORM_CLASS (klass)->get_unit_size =
GST_DEBUG_FUNCPTR (gst_audio_resample_get_unit_size);
GST_BASE_TRANSFORM_CLASS (klass)->transform_caps =
GST_DEBUG_FUNCPTR (gst_audio_resample_transform_caps);
GST_BASE_TRANSFORM_CLASS (klass)->fixate_caps =
GST_DEBUG_FUNCPTR (gst_audio_resample_fixate_caps);
GST_BASE_TRANSFORM_CLASS (klass)->set_caps =
GST_DEBUG_FUNCPTR (gst_audio_resample_set_caps);
GST_BASE_TRANSFORM_CLASS (klass)->transform =
GST_DEBUG_FUNCPTR (gst_audio_resample_transform);
GST_BASE_TRANSFORM_CLASS (klass)->sink_event =
GST_DEBUG_FUNCPTR (gst_audio_resample_sink_event);
GST_BASE_TRANSFORM_CLASS (klass)->passthrough_on_same_caps = TRUE;
}
static void
gst_audio_resample_init (GstAudioResample * resample)
{
GstBaseTransform *trans = GST_BASE_TRANSFORM (resample);
resample->quality = SPEEX_RESAMPLER_QUALITY_DEFAULT;
resample->sinc_filter_mode = SPEEX_RESAMPLER_SINC_FILTER_DEFAULT;
resample->sinc_filter_auto_threshold = SPEEX_RESAMPLER_SINC_FILTER_AUTO_THRESHOLD_DEFAULT;
gst_base_transform_set_gap_aware (trans, TRUE);
gst_pad_set_query_function (trans->srcpad, gst_audio_resample_query);
}
/* vmethods */
static gboolean
gst_audio_resample_start (GstBaseTransform * base)
{
GstAudioResample *resample = GST_AUDIO_RESAMPLE (base);
resample->need_discont = TRUE;
resample->num_gap_samples = 0;
resample->num_nongap_samples = 0;
resample->t0 = GST_CLOCK_TIME_NONE;
resample->in_offset0 = GST_BUFFER_OFFSET_NONE;
resample->out_offset0 = GST_BUFFER_OFFSET_NONE;
resample->samples_in = 0;
resample->samples_out = 0;
resample->tmp_in = NULL;
resample->tmp_in_size = 0;
resample->tmp_out = NULL;
resample->tmp_out_size = 0;
return TRUE;
}
static gboolean
gst_audio_resample_stop (GstBaseTransform * base)
{
GstAudioResample *resample = GST_AUDIO_RESAMPLE (base);
if (resample->state) {
resample->funcs->destroy (resample->state);
resample->state = NULL;
}
resample->funcs = NULL;
g_free (resample->tmp_in);
resample->tmp_in = NULL;
resample->tmp_in_size = 0;
g_free (resample->tmp_out);
resample->tmp_out = NULL;
resample->tmp_out_size = 0;
return TRUE;
}
static gboolean
gst_audio_resample_get_unit_size (GstBaseTransform * base, GstCaps * caps,
gsize * size)
{
GstAudioInfo info;
if (!gst_audio_info_from_caps (&info, caps))
goto invalid_caps;
*size = GST_AUDIO_INFO_BPF (&info);
return TRUE;
/* ERRORS */
invalid_caps:
{
GST_ERROR_OBJECT (base, "invalid caps");
return FALSE;
}
}
static GstCaps *
gst_audio_resample_transform_caps (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps, GstCaps * filter)
{
const GValue *val;
GstStructure *s;
GstCaps *res;
gint i, n;
/* transform single caps into input_caps + input_caps with the rate
* field set to our supported range. This ensures that upstream knows
* about downstream's prefered rate(s) and can negotiate accordingly. */
res = gst_caps_new_empty ();
n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
s = gst_caps_get_structure (caps, i);
/* If this is already expressed by the existing caps
* skip this structure */
if (i > 0 && gst_caps_is_subset_structure (res, s))
continue;
/* first, however, check if the caps contain a range for the rate field, in
* which case that side isn't going to care much about the exact sample rate
* chosen and we should just assume things will get fixated to something sane
* and we may just as well offer our full range instead of the range in the
* caps. If the rate is not an int range value, it's likely to express a
* real preference or limitation and we should maintain that structure as
* preference by putting it first into the transformed caps, and only add
* our full rate range as second option */
s = gst_structure_copy (s);
val = gst_structure_get_value (s, "rate");
if (val == NULL || GST_VALUE_HOLDS_INT_RANGE (val)) {
/* overwrite existing range, or add field if it doesn't exist yet */
gst_structure_set (s, "rate", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
} else {
/* append caps with full range to existing caps with non-range rate field */
gst_caps_append_structure (res, gst_structure_copy (s));
gst_structure_set (s, "rate", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
}
gst_caps_append_structure (res, s);
}
if (filter) {
GstCaps *intersection;
intersection =
gst_caps_intersect_full (filter, res, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (res);
res = intersection;
}
return res;
}
/* Fixate rate to the allowed rate that has the smallest difference */
static GstCaps *
gst_audio_resample_fixate_caps (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
{
GstStructure *s;
gint rate;
s = gst_caps_get_structure (caps, 0);
if (G_UNLIKELY (!gst_structure_get_int (s, "rate", &rate)))
return othercaps;
othercaps = gst_caps_truncate (othercaps);
othercaps = gst_caps_make_writable (othercaps);
s = gst_caps_get_structure (othercaps, 0);
gst_structure_fixate_field_nearest_int (s, "rate", rate);
return othercaps;
}
static const SpeexResampleFuncs *
gst_audio_resample_get_funcs (gint width, gboolean fp)
{
const SpeexResampleFuncs *funcs = NULL;
if (gst_audio_resample_use_int && (width == 8 || width == 16) && !fp)
funcs = &int_funcs;
else if ((!gst_audio_resample_use_int && (width == 8 || width == 16) && !fp)
|| (width == 32 && fp))
funcs = &float_funcs;
else if ((width == 64 && fp) || ((width == 32 || width == 24) && !fp))
funcs = &double_funcs;
else
g_assert_not_reached ();
return funcs;
}
static SpeexResamplerState *
gst_audio_resample_init_state (GstAudioResample * resample, gint width,
gint channels, gint inrate, gint outrate, gint quality, gboolean fp,
SpeexResamplerSincFilterMode sinc_filter_mode,
guint32 sinc_filter_auto_threshold)
{
SpeexResamplerState *ret = NULL;
gint err = RESAMPLER_ERR_SUCCESS;
const SpeexResampleFuncs *funcs = gst_audio_resample_get_funcs (width, fp);
ret = funcs->init (channels, inrate, outrate, quality,
sinc_filter_mode, sinc_filter_auto_threshold, &err);
if (G_UNLIKELY (err != RESAMPLER_ERR_SUCCESS)) {
GST_ERROR_OBJECT (resample, "Failed to create resampler state: %s",
funcs->strerror (err));
return NULL;
}
if (sinc_filter_mode == SPEEX_RESAMPLER_SINC_FILTER_AUTO) {
GST_INFO_OBJECT (resample, "Using the %s sinc filter table",
funcs->get_sinc_filter_mode(ret) ? "full" : "interpolated");
}
funcs->skip_zeros (ret);
return ret;
}
static gboolean
gst_audio_resample_update_state (GstAudioResample * resample, gint width,
gint channels, gint inrate, gint outrate, gint quality, gboolean fp,
SpeexResamplerSincFilterMode sinc_filter_mode,
guint32 sinc_filter_auto_threshold)
{
gboolean ret = TRUE;
gboolean updated_latency = FALSE;
updated_latency = (resample->inrate != inrate
|| quality != resample->quality) && resample->state != NULL;
if (resample->state == NULL) {
ret = TRUE;
} else if (resample->channels != channels || fp != resample->fp
|| width != resample->width || sinc_filter_mode != resample->sinc_filter_mode
|| sinc_filter_auto_threshold != resample->sinc_filter_auto_threshold) {
resample->funcs->destroy (resample->state);
resample->state =
gst_audio_resample_init_state (resample, width, channels, inrate,
outrate, quality, fp, sinc_filter_mode, sinc_filter_auto_threshold);
resample->funcs = gst_audio_resample_get_funcs (width, fp);
ret = (resample->state != NULL);
} else if (resample->inrate != inrate || resample->outrate != outrate) {
gint err = RESAMPLER_ERR_SUCCESS;
err = resample->funcs->set_rate (resample->state, inrate, outrate);
if (G_UNLIKELY (err != RESAMPLER_ERR_SUCCESS))
GST_ERROR_OBJECT (resample, "Failed to update rate: %s",
resample->funcs->strerror (err));
ret = (err == RESAMPLER_ERR_SUCCESS);
} else if (quality != resample->quality) {
gint err = RESAMPLER_ERR_SUCCESS;
err = resample->funcs->set_quality (resample->state, quality);
if (G_UNLIKELY (err != RESAMPLER_ERR_SUCCESS))
GST_ERROR_OBJECT (resample, "Failed to update quality: %s",
resample->funcs->strerror (err));
ret = (err == RESAMPLER_ERR_SUCCESS);
}
resample->width = width;
resample->channels = channels;
resample->fp = fp;
resample->quality = quality;
resample->inrate = inrate;
resample->outrate = outrate;
resample->sinc_filter_mode = sinc_filter_mode;
resample->sinc_filter_auto_threshold = sinc_filter_auto_threshold;
if (updated_latency)
gst_element_post_message (GST_ELEMENT (resample),
gst_message_new_latency (GST_OBJECT (resample)));
return ret;
}
static void
gst_audio_resample_reset_state (GstAudioResample * resample)
{
if (resample->state)
resample->funcs->reset_mem (resample->state);
}
static gint
_gcd (gint a, gint b)
{
while (b != 0) {
int temp = a;
a = b;
b = temp % b;
}
return ABS (a);
}
static gboolean
gst_audio_resample_transform_size (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps, gsize size, GstCaps * othercaps,
gsize * othersize)
{
gboolean ret = TRUE;
GstAudioInfo in, out;
guint32 ratio_den, ratio_num;
gint inrate, outrate, gcd;
gint bpf;
GST_LOG_OBJECT (base, "asked to transform size %" G_GSIZE_FORMAT
" in direction %s", size, direction == GST_PAD_SINK ? "SINK" : "SRC");
/* Get sample width -> bytes_per_samp, channels, inrate, outrate */
ret = gst_audio_info_from_caps (&in, caps);
ret &= gst_audio_info_from_caps (&out, othercaps);
if (G_UNLIKELY (!ret)) {
GST_ERROR_OBJECT (base, "Wrong caps");
return FALSE;
}
/* Number of samples in either buffer is size / (width*channels) ->
* calculate the factor */
bpf = GST_AUDIO_INFO_BPF (&in);
inrate = GST_AUDIO_INFO_RATE (&in);
outrate = GST_AUDIO_INFO_RATE (&out);
/* Convert source buffer size to samples */
size /= bpf;
/* Simplify the conversion ratio factors */
gcd = _gcd (inrate, outrate);
ratio_num = inrate / gcd;
ratio_den = outrate / gcd;
if (direction == GST_PAD_SINK) {
/* asked to convert size of an incoming buffer. Round up the output size */
*othersize = gst_util_uint64_scale_int_ceil (size, ratio_den, ratio_num);
*othersize *= bpf;
} else {
/* asked to convert size of an outgoing buffer. Round down the input size */
*othersize = gst_util_uint64_scale_int (size, ratio_num, ratio_den);
*othersize *= bpf;
}
GST_LOG_OBJECT (base,
"transformed size %" G_GSIZE_FORMAT " to %" G_GSIZE_FORMAT,
size * bpf, *othersize);
return ret;
}
static gboolean
gst_audio_resample_set_caps (GstBaseTransform * base, GstCaps * incaps,
GstCaps * outcaps)
{
gboolean ret;
gint width, inrate, outrate, channels;
gboolean fp;
GstAudioResample *resample = GST_AUDIO_RESAMPLE (base);
GstAudioInfo in, out;
GST_LOG ("incaps %" GST_PTR_FORMAT ", outcaps %"
GST_PTR_FORMAT, incaps, outcaps);
if (!gst_audio_info_from_caps (&in, incaps))
goto invalid_incaps;
if (!gst_audio_info_from_caps (&out, outcaps))
goto invalid_outcaps;
/* FIXME do some checks */
/* take new values */
width = GST_AUDIO_FORMAT_INFO_WIDTH (in.finfo);
channels = GST_AUDIO_INFO_CHANNELS (&in);
inrate = GST_AUDIO_INFO_RATE (&in);
outrate = GST_AUDIO_INFO_RATE (&out);
fp = GST_AUDIO_FORMAT_INFO_IS_FLOAT (in.finfo);
ret =
gst_audio_resample_update_state (resample, width, channels, inrate,
outrate, resample->quality, fp, resample->sinc_filter_mode,
resample->sinc_filter_auto_threshold);
if (G_UNLIKELY (!ret))
return FALSE;
return TRUE;
/* ERROR */
invalid_incaps:
{
GST_ERROR_OBJECT (base, "invalid incaps");
return FALSE;
}
invalid_outcaps:
{
GST_ERROR_OBJECT (base, "invalid outcaps");
return FALSE;
}
}
#define GST_MAXINT24 (8388607)
#define GST_MININT24 (-8388608)
#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
#define GST_READ_UINT24 GST_READ_UINT24_LE
#define GST_WRITE_UINT24 GST_WRITE_UINT24_LE
#else
#define GST_READ_UINT24 GST_READ_UINT24_BE
#define GST_WRITE_UINT24 GST_WRITE_UINT24_BE
#endif
static void
gst_audio_resample_convert_buffer (GstAudioResample * resample,
const guint8 * in, guint8 * out, guint len, gboolean inverse)
{
len *= resample->channels;
if (inverse) {
if (gst_audio_resample_use_int && resample->width == 8 && !resample->fp) {
gint8 *o = (gint8 *) out;
gint16 *i = (gint16 *) in;
gint32 tmp;
while (len) {
tmp = *i + (G_MAXINT8 >> 1);
*o = CLAMP (tmp >> 8, G_MININT8, G_MAXINT8);
o++;
i++;
len--;
}
} else if (!gst_audio_resample_use_int && resample->width == 8
&& !resample->fp) {
gint8 *o = (gint8 *) out;
gfloat *i = (gfloat *) in;
gfloat tmp;
while (len) {
tmp = *i;
*o = (gint8) CLAMP (tmp * G_MAXINT8 + 0.5, G_MININT8, G_MAXINT8);
o++;
i++;
len--;
}
} else if (!gst_audio_resample_use_int && resample->width == 16
&& !resample->fp) {
gint16 *o = (gint16 *) out;
gfloat *i = (gfloat *) in;
gfloat tmp;
while (len) {
tmp = *i;
*o = (gint16) CLAMP (tmp * G_MAXINT16 + 0.5, G_MININT16, G_MAXINT16);
o++;
i++;
len--;
}
} else if (resample->width == 24 && !resample->fp) {
guint8 *o = (guint8 *) out;
gdouble *i = (gdouble *) in;
gdouble tmp;
while (len) {
tmp = *i;
GST_WRITE_UINT24 (o, (gint32) CLAMP (tmp * GST_MAXINT24 + 0.5,
GST_MININT24, GST_MAXINT24));
o += 3;
i++;
len--;
}
} else if (resample->width == 32 && !resample->fp) {
gint32 *o = (gint32 *) out;
gdouble *i = (gdouble *) in;
gdouble tmp;
while (len) {
tmp = *i;
*o = (gint32) CLAMP (tmp * G_MAXINT32 + 0.5, G_MININT32, G_MAXINT32);
o++;
i++;
len--;
}
} else {
g_assert_not_reached ();
}
} else {
if (gst_audio_resample_use_int && resample->width == 8 && !resample->fp) {
gint8 *i = (gint8 *) in;
gint16 *o = (gint16 *) out;
gint32 tmp;
while (len) {
tmp = *i;
*o = tmp << 8;
o++;
i++;
len--;
}
} else if (!gst_audio_resample_use_int && resample->width == 8
&& !resample->fp) {
gint8 *i = (gint8 *) in;
gfloat *o = (gfloat *) out;
gfloat tmp;
while (len) {
tmp = *i;
*o = tmp / G_MAXINT8;
o++;
i++;
len--;
}
} else if (!gst_audio_resample_use_int && resample->width == 16
&& !resample->fp) {
gint16 *i = (gint16 *) in;
gfloat *o = (gfloat *) out;
gfloat tmp;
while (len) {
tmp = *i;
*o = tmp / G_MAXINT16;
o++;
i++;
len--;
}
} else if (resample->width == 24 && !resample->fp) {
guint8 *i = (guint8 *) in;
gdouble *o = (gdouble *) out;
gdouble tmp;
guint32 tmp2;
while (len) {
tmp2 = GST_READ_UINT24 (i);
if (tmp2 & 0x00800000)
tmp2 |= 0xff000000;
tmp = (gint32) tmp2;
*o = tmp / GST_MAXINT24;
o++;
i += 3;
len--;
}
} else if (resample->width == 32 && !resample->fp) {
gint32 *i = (gint32 *) in;
gdouble *o = (gdouble *) out;
gdouble tmp;
while (len) {
tmp = *i;
*o = tmp / G_MAXINT32;
o++;
i++;
len--;
}
} else {
g_assert_not_reached ();
}
}
}
static guint8 *
gst_audio_resample_workspace_realloc (guint8 ** workspace, guint * size,
guint new_size)
{
guint8 *new;
if (new_size <= *size)
/* no need to resize */
return *workspace;
new = g_realloc (*workspace, new_size);
if (!new)
/* failure (re)allocating memeory */
return NULL;
/* success */
*workspace = new;
*size = new_size;
return *workspace;
}
/* Push history_len zeros into the filter, but discard the output. */
static void
gst_audio_resample_dump_drain (GstAudioResample * resample, guint history_len)
{
gint outsize;
guint in_len G_GNUC_UNUSED, in_processed;
guint out_len, out_processed;
guint num, den;
gpointer buf;
g_assert (resample->state != NULL);
resample->funcs->get_ratio (resample->state, &num, &den);
in_len = in_processed = history_len;
out_processed = out_len =
gst_util_uint64_scale_int_ceil (history_len, den, num);
outsize = out_len * resample->channels * (resample->funcs->width / 8);
if (out_len == 0)
return;
buf = g_malloc (outsize);
resample->funcs->process (resample->state, NULL, &in_processed, buf,
&out_processed);
g_free (buf);
g_assert (in_len == in_processed);
}
static void
gst_audio_resample_push_drain (GstAudioResample * resample, guint history_len)
{
GstBuffer *outbuf;
GstFlowReturn res;
gint outsize;
guint in_len, in_processed;
guint out_len, out_processed;
gint err;
guint num, den;
GstMapInfo map;
g_assert (resample->state != NULL);
/* Don't drain samples if we were reset. */
if (!GST_CLOCK_TIME_IS_VALID (resample->t0))
return;
resample->funcs->get_ratio (resample->state, &num, &den);
in_len = in_processed = history_len;
out_len = out_processed =
gst_util_uint64_scale_int_ceil (history_len, den, num);
outsize = out_len * resample->channels * (resample->width / 8);
if (out_len == 0)
return;
outbuf = gst_buffer_new_and_alloc (outsize);
gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
if (resample->funcs->width != resample->width) {
/* need to convert data format; allocate workspace */
if (!gst_audio_resample_workspace_realloc (&resample->tmp_out,
&resample->tmp_out_size, (resample->funcs->width / 8) * out_len *
resample->channels)) {
GST_ERROR_OBJECT (resample, "failed to allocate workspace");
return;
}
/* process */
err = resample->funcs->process (resample->state, NULL, &in_processed,
resample->tmp_out, &out_processed);
/* convert output format */
gst_audio_resample_convert_buffer (resample, resample->tmp_out,
map.data, out_processed, TRUE);
} else {
/* don't need to convert data format; process */
err = resample->funcs->process (resample->state, NULL, &in_processed,
map.data, &out_processed);
}
/* If we wrote more than allocated something is really wrong now
* and we should better abort immediately */
g_assert (out_len >= out_processed);
outsize = out_processed * resample->channels * (resample->width / 8);
gst_buffer_unmap (outbuf, &map);
gst_buffer_resize (outbuf, 0, outsize);
if (G_UNLIKELY (err != RESAMPLER_ERR_SUCCESS)) {
GST_WARNING_OBJECT (resample, "Failed to process drain: %s",
resample->funcs->strerror (err));
gst_buffer_unref (outbuf);
return;
}
/* time */
if (GST_CLOCK_TIME_IS_VALID (resample->t0)) {
GST_BUFFER_TIMESTAMP (outbuf) = resample->t0 +
gst_util_uint64_scale_int_round (resample->samples_out, GST_SECOND,
resample->outrate);
GST_BUFFER_DURATION (outbuf) = resample->t0 +
gst_util_uint64_scale_int_round (resample->samples_out + out_processed,
GST_SECOND, resample->outrate) - GST_BUFFER_TIMESTAMP (outbuf);
} else {
GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
}
/* offset */
if (resample->out_offset0 != GST_BUFFER_OFFSET_NONE) {
GST_BUFFER_OFFSET (outbuf) = resample->out_offset0 + resample->samples_out;
GST_BUFFER_OFFSET_END (outbuf) = GST_BUFFER_OFFSET (outbuf) + out_processed;
} else {
GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET_NONE;
GST_BUFFER_OFFSET_END (outbuf) = GST_BUFFER_OFFSET_NONE;
}
/* move along */
resample->samples_out += out_processed;
resample->samples_in += history_len;
if (G_UNLIKELY (out_processed == 0 && in_len * den > num)) {
GST_WARNING_OBJECT (resample, "Failed to get drain, dropping buffer");
gst_buffer_unref (outbuf);
return;
}
GST_LOG_OBJECT (resample,
"Pushing drain buffer of %u bytes with timestamp %" GST_TIME_FORMAT
" duration %" GST_TIME_FORMAT " offset %" G_GUINT64_FORMAT " offset_end %"
G_GUINT64_FORMAT, outsize,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)), GST_BUFFER_OFFSET (outbuf),
GST_BUFFER_OFFSET_END (outbuf));
res = gst_pad_push (GST_BASE_TRANSFORM_SRC_PAD (resample), outbuf);
if (G_UNLIKELY (res != GST_FLOW_OK))
GST_WARNING_OBJECT (resample, "Failed to push drain: %s",
gst_flow_get_name (res));
return;
}
static gboolean
gst_audio_resample_sink_event (GstBaseTransform * base, GstEvent * event)
{
GstAudioResample *resample = GST_AUDIO_RESAMPLE (base);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
gst_audio_resample_reset_state (resample);
if (resample->state)
resample->funcs->skip_zeros (resample->state);
resample->num_gap_samples = 0;
resample->num_nongap_samples = 0;
resample->t0 = GST_CLOCK_TIME_NONE;
resample->in_offset0 = GST_BUFFER_OFFSET_NONE;
resample->out_offset0 = GST_BUFFER_OFFSET_NONE;
resample->samples_in = 0;
resample->samples_out = 0;
resample->need_discont = TRUE;
break;
case GST_EVENT_SEGMENT:
if (resample->state) {
guint latency = resample->funcs->get_input_latency (resample->state);
gst_audio_resample_push_drain (resample, latency);
}
gst_audio_resample_reset_state (resample);
if (resample->state)
resample->funcs->skip_zeros (resample->state);
resample->num_gap_samples = 0;
resample->num_nongap_samples = 0;
resample->t0 = GST_CLOCK_TIME_NONE;
resample->in_offset0 = GST_BUFFER_OFFSET_NONE;
resample->out_offset0 = GST_BUFFER_OFFSET_NONE;
resample->samples_in = 0;
resample->samples_out = 0;
resample->need_discont = TRUE;
break;
case GST_EVENT_EOS:
if (resample->state) {
guint latency = resample->funcs->get_input_latency (resample->state);
gst_audio_resample_push_drain (resample, latency);
}
gst_audio_resample_reset_state (resample);
break;
default:
break;
}
return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (base, event);
}
static gboolean
gst_audio_resample_check_discont (GstAudioResample * resample, GstBuffer * buf)
{
guint64 offset;
guint64 delta;
/* is the incoming buffer a discontinuity? */
if (G_UNLIKELY (GST_BUFFER_IS_DISCONT (buf)))
return TRUE;
/* no valid timestamps or offsets to compare --> no discontinuity */
if (G_UNLIKELY (!(GST_BUFFER_TIMESTAMP_IS_VALID (buf) &&
GST_CLOCK_TIME_IS_VALID (resample->t0))))
return FALSE;
/* convert the inbound timestamp to an offset. */
offset =
gst_util_uint64_scale_int_round (GST_BUFFER_TIMESTAMP (buf) -
resample->t0, resample->inrate, GST_SECOND);
/* many elements generate imperfect streams due to rounding errors, so we
* permit a small error (up to one sample) without triggering a filter
* flush/restart (if triggered incorrectly, this will be audible) */
/* allow even up to more samples, since sink is not so strict anyway,
* so give that one a chance to handle this as configured */
delta = ABS ((gint64) (offset - resample->samples_in));
if (delta <= (resample->inrate >> 5))
return FALSE;
GST_WARNING_OBJECT (resample,
"encountered timestamp discontinuity of %" G_GUINT64_FORMAT " samples = %"
GST_TIME_FORMAT, delta,
GST_TIME_ARGS (gst_util_uint64_scale_int_round (delta, GST_SECOND,
resample->inrate)));
return TRUE;
}
static GstFlowReturn
gst_audio_resample_process (GstAudioResample * resample, GstBuffer * inbuf,
GstBuffer * outbuf)
{
GstMapInfo in_map, out_map;
gsize outsize;
guint32 in_len, in_processed;
guint32 out_len, out_processed;
guint filt_len = resample->funcs->get_filt_len (resample->state);
gst_buffer_map (inbuf, &in_map, GST_MAP_READ);
gst_buffer_map (outbuf, &out_map, GST_MAP_WRITE);
in_len = in_map.size / resample->channels;
out_len = out_map.size / resample->channels;
in_len /= (resample->width / 8);
out_len /= (resample->width / 8);
in_processed = in_len;
out_processed = out_len;
if (GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_GAP)) {
resample->num_nongap_samples = 0;
if (resample->num_gap_samples < filt_len) {
guint zeros_to_push;
if (in_len >= filt_len - resample->num_gap_samples)
zeros_to_push = filt_len - resample->num_gap_samples;
else
zeros_to_push = in_len;
gst_audio_resample_push_drain (resample, zeros_to_push);
in_len -= zeros_to_push;
resample->num_gap_samples += zeros_to_push;
}
{
guint num, den;
resample->funcs->get_ratio (resample->state, &num, &den);
if (resample->samples_in + in_len >= filt_len / 2)
out_processed =
gst_util_uint64_scale_int_ceil (resample->samples_in + in_len -
filt_len / 2, den, num) - resample->samples_out;
else
out_processed = 0;
memset (out_map.data, 0, out_map.size);
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_GAP);
resample->num_gap_samples += in_len;
in_processed = in_len;
}
} else { /* not a gap */
gint err;
if (resample->num_gap_samples > filt_len) {
/* push in enough zeros to restore the filter to the right offset */
guint num, den;
resample->funcs->get_ratio (resample->state, &num, &den);
gst_audio_resample_dump_drain (resample,
(resample->num_gap_samples - filt_len) % num);
}
resample->num_gap_samples = 0;
if (resample->num_nongap_samples < filt_len) {
resample->num_nongap_samples += in_len;
if (resample->num_nongap_samples > filt_len)
resample->num_nongap_samples = filt_len;
}
if (resample->funcs->width != resample->width) {
/* need to convert data format for processing; ensure we have enough
* workspace available */
if (!gst_audio_resample_workspace_realloc (&resample->tmp_in,
&resample->tmp_in_size, in_len * resample->channels *
(resample->funcs->width / 8)) ||
!gst_audio_resample_workspace_realloc (&resample->tmp_out,
&resample->tmp_out_size, out_len * resample->channels *
(resample->funcs->width / 8))) {
GST_ERROR_OBJECT (resample, "failed to allocate workspace");
gst_buffer_unmap (inbuf, &in_map);
gst_buffer_unmap (outbuf, &out_map);
return GST_FLOW_ERROR;
}
/* convert input */
gst_audio_resample_convert_buffer (resample, in_map.data,
resample->tmp_in, in_len, FALSE);
/* process */
err = resample->funcs->process (resample->state,
resample->tmp_in, &in_processed, resample->tmp_out, &out_processed);
/* convert output */
gst_audio_resample_convert_buffer (resample, resample->tmp_out,
out_map.data, out_processed, TRUE);
} else {
/* no format conversion required; process */
err = resample->funcs->process (resample->state,
in_map.data, &in_processed, out_map.data, &out_processed);
}
if (G_UNLIKELY (err != RESAMPLER_ERR_SUCCESS)) {
GST_ERROR_OBJECT (resample, "Failed to convert data: %s",
resample->funcs->strerror (err));
gst_buffer_unmap (inbuf, &in_map);
gst_buffer_unmap (outbuf, &out_map);
return GST_FLOW_ERROR;
}
}
/* If we wrote more than allocated something is really wrong now and we
* should better abort immediately */
g_assert (out_len >= out_processed);
if (G_UNLIKELY (in_len != in_processed)) {
GST_WARNING_OBJECT (resample, "converted %d of %d input samples",
in_processed, in_len);
}
/* time */
if (GST_CLOCK_TIME_IS_VALID (resample->t0)) {
GST_BUFFER_TIMESTAMP (outbuf) = resample->t0 +
gst_util_uint64_scale_int_round (resample->samples_out, GST_SECOND,
resample->outrate);
GST_BUFFER_DURATION (outbuf) = resample->t0 +
gst_util_uint64_scale_int_round (resample->samples_out + out_processed,
GST_SECOND, resample->outrate) - GST_BUFFER_TIMESTAMP (outbuf);
} else {
GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
}
/* offset */
if (resample->out_offset0 != GST_BUFFER_OFFSET_NONE) {
GST_BUFFER_OFFSET (outbuf) = resample->out_offset0 + resample->samples_out;
GST_BUFFER_OFFSET_END (outbuf) = GST_BUFFER_OFFSET (outbuf) + out_processed;
} else {
GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET_NONE;
GST_BUFFER_OFFSET_END (outbuf) = GST_BUFFER_OFFSET_NONE;
}
/* move along */
resample->samples_out += out_processed;
resample->samples_in += in_len;
gst_buffer_unmap (inbuf, &in_map);
gst_buffer_unmap (outbuf, &out_map);
outsize = out_processed * resample->channels * (resample->width / 8);
gst_buffer_resize (outbuf, 0, outsize);
GST_LOG_OBJECT (resample,
"Converted to buffer of %" G_GUINT32_FORMAT
" samples (%" G_GSIZE_FORMAT " bytes) with timestamp %" GST_TIME_FORMAT
", duration %" GST_TIME_FORMAT ", offset %" G_GUINT64_FORMAT
", offset_end %" G_GUINT64_FORMAT, out_processed, outsize,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)),
GST_BUFFER_OFFSET (outbuf), GST_BUFFER_OFFSET_END (outbuf));
return GST_FLOW_OK;
}
static GstFlowReturn
gst_audio_resample_transform (GstBaseTransform * base, GstBuffer * inbuf,
GstBuffer * outbuf)
{
GstAudioResample *resample = GST_AUDIO_RESAMPLE (base);
GstFlowReturn ret;
if (resample->state == NULL) {
if (G_UNLIKELY (!(resample->state =
gst_audio_resample_init_state (resample, resample->width,
resample->channels, resample->inrate, resample->outrate,
resample->quality, resample->fp, resample->sinc_filter_mode,
resample->sinc_filter_auto_threshold))))
return GST_FLOW_ERROR;
resample->funcs =
gst_audio_resample_get_funcs (resample->width, resample->fp);
}
GST_LOG_OBJECT (resample, "transforming buffer of %" G_GSIZE_FORMAT " bytes,"
" ts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT ", offset %"
G_GINT64_FORMAT ", offset_end %" G_GINT64_FORMAT,
gst_buffer_get_size (inbuf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (inbuf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (inbuf)),
GST_BUFFER_OFFSET (inbuf), GST_BUFFER_OFFSET_END (inbuf));
/* check for timestamp discontinuities; flush/reset if needed, and set
* flag to resync timestamp and offset counters and send event
* downstream */
if (G_UNLIKELY (gst_audio_resample_check_discont (resample, inbuf))) {
gst_audio_resample_reset_state (resample);
resample->need_discont = TRUE;
}
/* handle discontinuity */
if (G_UNLIKELY (resample->need_discont)) {
resample->funcs->skip_zeros (resample->state);
resample->num_gap_samples = 0;
resample->num_nongap_samples = 0;
/* reset */
resample->samples_in = 0;
resample->samples_out = 0;
GST_DEBUG_OBJECT (resample, "found discontinuity; resyncing");
/* resync the timestamp and offset counters if possible */
if (GST_BUFFER_TIMESTAMP_IS_VALID (inbuf)) {
resample->t0 = GST_BUFFER_TIMESTAMP (inbuf);
} else {
GST_DEBUG_OBJECT (resample, "... but new timestamp is invalid");
resample->t0 = GST_CLOCK_TIME_NONE;
}
if (GST_BUFFER_OFFSET_IS_VALID (inbuf)) {
resample->in_offset0 = GST_BUFFER_OFFSET (inbuf);
resample->out_offset0 =
gst_util_uint64_scale_int_round (resample->in_offset0,
resample->outrate, resample->inrate);
} else {
GST_DEBUG_OBJECT (resample, "... but new offset is invalid");
resample->in_offset0 = GST_BUFFER_OFFSET_NONE;
resample->out_offset0 = GST_BUFFER_OFFSET_NONE;
}
/* set DISCONT flag on output buffer */
GST_DEBUG_OBJECT (resample, "marking this buffer with the DISCONT flag");
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
resample->need_discont = FALSE;
}
ret = gst_audio_resample_process (resample, inbuf, outbuf);
if (G_UNLIKELY (ret != GST_FLOW_OK))
return ret;
GST_DEBUG_OBJECT (resample, "input = samples [%" G_GUINT64_FORMAT ", %"
G_GUINT64_FORMAT ") = [%" G_GUINT64_FORMAT ", %" G_GUINT64_FORMAT
") ns; output = samples [%" G_GUINT64_FORMAT ", %" G_GUINT64_FORMAT
") = [%" G_GUINT64_FORMAT ", %" G_GUINT64_FORMAT ") ns",
GST_BUFFER_OFFSET (inbuf), GST_BUFFER_OFFSET_END (inbuf),
GST_BUFFER_TIMESTAMP (inbuf), GST_BUFFER_TIMESTAMP (inbuf) +
GST_BUFFER_DURATION (inbuf), GST_BUFFER_OFFSET (outbuf),
GST_BUFFER_OFFSET_END (outbuf), GST_BUFFER_TIMESTAMP (outbuf),
GST_BUFFER_TIMESTAMP (outbuf) + GST_BUFFER_DURATION (outbuf));
return GST_FLOW_OK;
}
static gboolean
gst_audio_resample_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstAudioResample *resample = GST_AUDIO_RESAMPLE (parent);
GstBaseTransform *trans;
gboolean res = TRUE;
trans = GST_BASE_TRANSFORM (resample);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime min, max;
gboolean live;
guint64 latency;
gint rate = resample->inrate;
gint resampler_latency;
if (resample->state)
resampler_latency =
resample->funcs->get_input_latency (resample->state);
else
resampler_latency = 0;
if (gst_base_transform_is_passthrough (trans))
resampler_latency = 0;
if ((res =
gst_pad_peer_query (GST_BASE_TRANSFORM_SINK_PAD (trans),
query))) {
gst_query_parse_latency (query, &live, &min, &max);
GST_DEBUG_OBJECT (resample, "Peer latency: min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
/* add our own latency */
if (rate != 0 && resampler_latency != 0)
latency = gst_util_uint64_scale_round (resampler_latency,
GST_SECOND, rate);
else
latency = 0;
GST_DEBUG_OBJECT (resample, "Our latency: %" GST_TIME_FORMAT,
GST_TIME_ARGS (latency));
min += latency;
if (GST_CLOCK_TIME_IS_VALID (max))
max += latency;
GST_DEBUG_OBJECT (resample, "Calculated total latency : min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
gst_query_set_latency (query, live, min, max);
}
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
static void
gst_audio_resample_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAudioResample *resample;
gint quality;
resample = GST_AUDIO_RESAMPLE (object);
switch (prop_id) {
case PROP_QUALITY:
/* FIXME locking! */
quality = g_value_get_int (value);
GST_DEBUG_OBJECT (resample, "new quality %d", quality);
gst_audio_resample_update_state (resample, resample->width,
resample->channels, resample->inrate, resample->outrate,
quality, resample->fp, resample->sinc_filter_mode,
resample->sinc_filter_auto_threshold);
break;
case PROP_SINC_FILTER_MODE: {
/* FIXME locking! */
SpeexResamplerSincFilterMode sinc_filter_mode = g_value_get_enum (value);
gst_audio_resample_update_state (resample, resample->width,
resample->channels, resample->inrate, resample->outrate,
resample->quality, resample->fp, sinc_filter_mode,
resample->sinc_filter_auto_threshold);
break;
}
case PROP_SINC_FILTER_AUTO_THRESHOLD: {
/* FIXME locking! */
guint32 sinc_filter_auto_threshold = g_value_get_uint (value);
gst_audio_resample_update_state (resample, resample->width,
resample->channels, resample->inrate, resample->outrate,
resample->quality, resample->fp, resample->sinc_filter_mode,
sinc_filter_auto_threshold);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_audio_resample_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAudioResample *resample;
resample = GST_AUDIO_RESAMPLE (object);
switch (prop_id) {
case PROP_QUALITY:
g_value_set_int (value, resample->quality);
break;
case PROP_SINC_FILTER_MODE:
g_value_set_enum(value, resample->sinc_filter_mode);
break;
case PROP_SINC_FILTER_AUTO_THRESHOLD:
g_value_set_uint(value, resample->sinc_filter_auto_threshold);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GType
speex_resampler_sinc_filter_mode_get_type (void)
{
static GType speex_resampler_sinc_filter_mode_type = 0;
if (!speex_resampler_sinc_filter_mode_type) {
static GEnumValue sinc_filter_modes[] = {
{ SPEEX_RESAMPLER_SINC_FILTER_INTERPOLATED, "Use interpolated sinc table", "interpolated" },
{ SPEEX_RESAMPLER_SINC_FILTER_FULL, "Use full sinc table", "full" },
{ SPEEX_RESAMPLER_SINC_FILTER_AUTO, "Use full table if table size below threshold", "auto" },
{ 0, NULL, NULL },
};
speex_resampler_sinc_filter_mode_type = g_enum_register_static (
"SpeexResamplerSincFilterMode",
sinc_filter_modes);
}
return speex_resampler_sinc_filter_mode_type;
}
/* FIXME: should have a benchmark fallback for the case where orc is disabled */
#if defined(AUDIORESAMPLE_FORMAT_AUTO) && !defined(DISABLE_ORC)
#define BENCHMARK_SIZE 512
static gboolean
_benchmark_int_float (SpeexResamplerState * st)
{
gint16 in[BENCHMARK_SIZE] = { 0, }, G_GNUC_UNUSED out[BENCHMARK_SIZE / 2];
gfloat in_tmp[BENCHMARK_SIZE], out_tmp[BENCHMARK_SIZE / 2];
gint i;
guint32 inlen = BENCHMARK_SIZE, outlen = BENCHMARK_SIZE / 2;
for (i = 0; i < BENCHMARK_SIZE; i++) {
gfloat tmp = in[i];
in_tmp[i] = tmp / G_MAXINT16;
}
resample_float_resampler_process_interleaved_float (st,
(const guint8 *) in_tmp, &inlen, (guint8 *) out_tmp, &outlen);
if (outlen == 0) {
GST_ERROR ("Failed to use float resampler");
return FALSE;
}
for (i = 0; i < outlen; i++) {
gfloat tmp = out_tmp[i];
out[i] = CLAMP (tmp * G_MAXINT16 + 0.5, G_MININT16, G_MAXINT16);
}
return TRUE;
}
static gboolean
_benchmark_int_int (SpeexResamplerState * st)
{
gint16 in[BENCHMARK_SIZE] = { 0, }, out[BENCHMARK_SIZE / 2];
guint32 inlen = BENCHMARK_SIZE, outlen = BENCHMARK_SIZE / 2;
resample_int_resampler_process_interleaved_int (st, (const guint8 *) in,
&inlen, (guint8 *) out, &outlen);
if (outlen == 0) {
GST_ERROR ("Failed to use int resampler");
return FALSE;
}
return TRUE;
}
static gboolean
_benchmark_integer_resampling (void)
{
OrcProfile a, b;
gdouble av, bv;
SpeexResamplerState *sta, *stb;
int i;
orc_profile_init (&a);
orc_profile_init (&b);
sta = resample_float_resampler_init (1, 48000, 24000, 4,
SPEEX_RESAMPLER_SINC_FILTER_INTERPOLATED,
SPEEX_RESAMPLER_SINC_FILTER_AUTO_THRESHOLD_DEFAULT,
NULL);
if (sta == NULL) {
GST_ERROR ("Failed to create float resampler state");
return FALSE;
}
stb = resample_int_resampler_init (1, 48000, 24000, 4,
SPEEX_RESAMPLER_SINC_FILTER_INTERPOLATED,
SPEEX_RESAMPLER_SINC_FILTER_AUTO_THRESHOLD_DEFAULT,
NULL);
if (stb == NULL) {
resample_float_resampler_destroy (sta);
GST_ERROR ("Failed to create int resampler state");
return FALSE;
}
/* Benchmark */
for (i = 0; i < 10; i++) {
orc_profile_start (&a);
if (!_benchmark_int_float (sta))
goto error;
orc_profile_stop (&a);
}
/* Benchmark */
for (i = 0; i < 10; i++) {
orc_profile_start (&b);
if (!_benchmark_int_int (stb))
goto error;
orc_profile_stop (&b);
}
/* Handle results */
orc_profile_get_ave_std (&a, &av, NULL);
orc_profile_get_ave_std (&b, &bv, NULL);
/* Remember benchmark result in global variable */
gst_audio_resample_use_int = (av > bv);
resample_float_resampler_destroy (sta);
resample_int_resampler_destroy (stb);
if (av > bv)
GST_INFO ("Using integer resampler if appropriate: %lf < %lf", bv, av);
else
GST_INFO ("Using float resampler for everything: %lf <= %lf", av, bv);
return TRUE;
error:
resample_float_resampler_destroy (sta);
resample_int_resampler_destroy (stb);
return FALSE;
}
#endif /* defined(AUDIORESAMPLE_FORMAT_AUTO) && !defined(DISABLE_ORC) */
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (audio_resample_debug, "audioresample", 0,
"audio resampling element");
#if defined(AUDIORESAMPLE_FORMAT_AUTO) && !defined(DISABLE_ORC)
if (!_benchmark_integer_resampling ())
return FALSE;
#else
GST_WARNING ("Orc disabled, can't benchmark int vs. float resampler");
{
GST_DEBUG_CATEGORY_GET (GST_CAT_PERFORMANCE, "GST_PERFORMANCE");
GST_CAT_WARNING (GST_CAT_PERFORMANCE, "orc disabled, no benchmarking done");
}
#endif
if (!gst_element_register (plugin, "audioresample", GST_RANK_PRIMARY,
GST_TYPE_AUDIO_RESAMPLE)) {
return FALSE;
}
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
audioresample,
"Resamples audio", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,
GST_PACKAGE_ORIGIN);
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