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gst/audiotestsrc/gstaudiotestsrc.*: Add float/double and int32 support to audiotestsrc. Fixes #460422.

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Original commit message from CVS:
* gst/audiotestsrc/gstaudiotestsrc.c: (gst_audio_test_src_init),
(gst_audio_test_src_src_fixate), (gst_audio_test_src_setcaps),
(gst_audio_test_src_init_sine_table),
(gst_audio_test_src_change_wave), (gst_audio_test_src_create):
* gst/audiotestsrc/gstaudiotestsrc.h:
Add float/double and int32 support to audiotestsrc. Fixes #460422.
Also set the default volume to the default value specified in the
GParamSpec.
This commit is contained in:
Sebastian Dröge 2007-08-03 19:53:11 +00:00
parent ef33f2fdc4
commit 6f397125d1
3 changed files with 317 additions and 130 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
ChangeLog
View file

@ -1,3 +1,14 @@
2007-08-03 Sebastian Dröge <slomo@circular-chaos.org>
* gst/audiotestsrc/gstaudiotestsrc.c: (gst_audio_test_src_init),
(gst_audio_test_src_src_fixate), (gst_audio_test_src_setcaps),
(gst_audio_test_src_init_sine_table),
(gst_audio_test_src_change_wave), (gst_audio_test_src_create):
* gst/audiotestsrc/gstaudiotestsrc.h:
Add float/double and int32 support to audiotestsrc. Fixes #460422.
Also set the default volume to the default value specified in the
GParamSpec.
2007-08-03 Sebastian Dröge <slomo@circular-chaos.org>
Patch by: Jens Granseuer <jensgr at gmx dot net>

419
gst/audiotestsrc/gstaudiotestsrc.c
View file

@ -87,14 +87,27 @@ enum
static GstStaticPadTemplate gst_audio_test_src_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) true, "
"width = (int) 16, "
"depth = (int) 16, " "rate = (int) [ 1, MAX ], " "channels = (int) 1")
"depth = (int) 16, "
"rate = (int) [ 1, MAX ], "
"channels = (int) 1; "
"audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) true, "
"width = (int) 32, "
"depth = (int) 32,"
"rate = (int) [ 1, MAX ], "
"channels = (int) 1; "
"audio/x-raw-float, "
"endianness = (int) BYTE_ORDER, "
"width = (int) { 32, 64 }, "
"rate = (int) [ 1, MAX ], " "channels = (int) 1")
);
@ -210,8 +223,10 @@ gst_audio_test_src_init (GstAudioTestSrc * src, GstAudioTestSrcClass * g_class)
gst_pad_set_fixatecaps_function (pad, gst_audio_test_src_src_fixate);
src->samplerate = 44100;
src->volume = 1.0;
src->format = GST_AUDIO_TEST_SRC_FORMAT_NONE;
src->volume = 0.8;
src->freq = 440.0;
/* we operate in time */
gst_base_src_set_format (GST_BASE_SRC (src), GST_FORMAT_TIME);
gst_base_src_set_live (GST_BASE_SRC (src), FALSE);
@ -221,18 +236,24 @@ gst_audio_test_src_init (GstAudioTestSrc * src, GstAudioTestSrcClass * g_class)
src->timestamp_offset = G_GINT64_CONSTANT (0);
src->wave = GST_AUDIO_TEST_SRC_WAVE_SINE;
gst_audio_test_src_change_wave (src);
}
static void
gst_audio_test_src_src_fixate (GstPad * pad, GstCaps * caps)
{
GstAudioTestSrc *src = GST_AUDIO_TEST_SRC (GST_PAD_PARENT (pad));
const gchar *name;
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "rate", src->samplerate);
name = gst_structure_get_name (structure);
if (strcmp (name, "audio/x-raw-int") == 0)
gst_structure_fixate_field_nearest_int (structure, "width", 32);
else if (strcmp (name, "audio/x-raw-float") == 0)
gst_structure_fixate_field_nearest_int (structure, "width", 64);
}
static gboolean
@ -240,11 +261,26 @@ gst_audio_test_src_setcaps (GstBaseSrc * basesrc, GstCaps * caps)
{
GstAudioTestSrc *src = GST_AUDIO_TEST_SRC (basesrc);
const GstStructure *structure;
const gchar *name;
gint width;
gboolean ret;
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (structure, "rate", &src->samplerate);
name = gst_structure_get_name (structure);
if (strcmp (name, "audio/x-raw-int") == 0) {
ret &= gst_structure_get_int (structure, "width", &width);
src->format = (width == 32) ? GST_AUDIO_TEST_SRC_FORMAT_S32 :
GST_AUDIO_TEST_SRC_FORMAT_S16;
} else {
ret &= gst_structure_get_int (structure, "width", &width);
src->format = (width == 32) ? GST_AUDIO_TEST_SRC_FORMAT_F32 :
GST_AUDIO_TEST_SRC_FORMAT_F64;
}
gst_audio_test_src_change_wave (src);
return ret;
}
@ -309,107 +345,183 @@ error:
}
}
static void
gst_audio_test_src_create_sine (GstAudioTestSrc * src, gint16 * samples)
{
gint i;
gdouble step, amp;
step = M_PI_M2 * src->freq / src->samplerate;
amp = src->volume * 32767.0;
for (i = 0; i < src->generate_samples_per_buffer; i++) {
src->accumulator += step;
if (src->accumulator >= M_PI_M2)
src->accumulator -= M_PI_M2;
samples[i] = (gint16) (sin (src->accumulator) * amp);
}
#define DEFINE_SINE(type,scale) \
static void \
gst_audio_test_src_create_sine_##type (GstAudioTestSrc * src, g##type * samples) \
{ \
gint i; \
gdouble step, amp; \
\
step = M_PI_M2 * src->freq / src->samplerate; \
amp = src->volume * scale; \
\
for (i = 0; i < src->generate_samples_per_buffer; i++) { \
src->accumulator += step; \
if (src->accumulator >= M_PI_M2) \
src->accumulator -= M_PI_M2; \
\
samples[i] = (g##type) (sin (src->accumulator) * amp); \
} \
}
static void
gst_audio_test_src_create_square (GstAudioTestSrc * src, gint16 * samples)
{
gint i;
gdouble step, amp;
DEFINE_SINE (int16, 32767.0);
DEFINE_SINE (int32, 2147483647.0);
DEFINE_SINE (float, 1.0);
DEFINE_SINE (double, 1.0);
step = M_PI_M2 * src->freq / src->samplerate;
amp = src->volume * 32767.0;
static ProcessFunc sine_funcs[] = {
(ProcessFunc) gst_audio_test_src_create_sine_int16,
(ProcessFunc) gst_audio_test_src_create_sine_int32,
(ProcessFunc) gst_audio_test_src_create_sine_float,
(ProcessFunc) gst_audio_test_src_create_sine_double
};
for (i = 0; i < src->generate_samples_per_buffer; i++) {
src->accumulator += step;
if (src->accumulator >= M_PI_M2)
src->accumulator -= M_PI_M2;
samples[i] = (gint16) ((src->accumulator < M_PI) ? amp : -amp);
}
#define DEFINE_SQUARE(type,scale) \
static void \
gst_audio_test_src_create_square_##type (GstAudioTestSrc * src, g##type * samples) \
{ \
gint i; \
gdouble step, amp; \
\
step = M_PI_M2 * src->freq / src->samplerate; \
amp = src->volume * scale; \
\
for (i = 0; i < src->generate_samples_per_buffer; i++) { \
src->accumulator += step; \
if (src->accumulator >= M_PI_M2) \
src->accumulator -= M_PI_M2; \
\
samples[i] = (g##type) ((src->accumulator < M_PI) ? amp : -amp); \
} \
}
static void
gst_audio_test_src_create_saw (GstAudioTestSrc * src, gint16 * samples)
{
gint i;
gdouble step, amp;
DEFINE_SQUARE (int16, 32767.0);
DEFINE_SQUARE (int32, 2147483647.0);
DEFINE_SQUARE (float, 1.0);
DEFINE_SQUARE (double, 1.0);
step = M_PI_M2 * src->freq / src->samplerate;
amp = (src->volume * 32767.0) / M_PI;
static ProcessFunc square_funcs[] = {
(ProcessFunc) gst_audio_test_src_create_square_int16,
(ProcessFunc) gst_audio_test_src_create_square_int32,
(ProcessFunc) gst_audio_test_src_create_square_float,
(ProcessFunc) gst_audio_test_src_create_square_double
};
for (i = 0; i < src->generate_samples_per_buffer; i++) {
src->accumulator += step;
if (src->accumulator >= M_PI_M2)
src->accumulator -= M_PI_M2;
if (src->accumulator < M_PI) {
samples[i] = (gint16) (src->accumulator * amp);
} else {
samples[i] = (gint16) ((M_PI_M2 - src->accumulator) * -amp);
}
}
#define DEFINE_SAW(type,scale) \
static void \
gst_audio_test_src_create_saw_##type (GstAudioTestSrc * src, g##type * samples) \
{ \
gint i; \
gdouble step, amp; \
\
step = M_PI_M2 * src->freq / src->samplerate; \
amp = (src->volume * scale) / M_PI; \
\
for (i = 0; i < src->generate_samples_per_buffer; i++) { \
src->accumulator += step; \
if (src->accumulator >= M_PI_M2) \
src->accumulator -= M_PI_M2; \
\
if (src->accumulator < M_PI) { \
samples[i] = (g##type) (src->accumulator * amp); \
} else { \
samples[i] = (g##type) ((M_PI_M2 - src->accumulator) * -amp); \
} \
} \
}
static void
gst_audio_test_src_create_triangle (GstAudioTestSrc * src, gint16 * samples)
{
gint i;
gdouble step, amp;
DEFINE_SAW (int16, 32767.0);
DEFINE_SAW (int32, 2147483647.0);
DEFINE_SAW (float, 1.0);
DEFINE_SAW (double, 1.0);
step = M_PI_M2 * src->freq / src->samplerate;
amp = (src->volume * 32767.0) / M_PI_2;
static ProcessFunc saw_funcs[] = {
(ProcessFunc) gst_audio_test_src_create_saw_int16,
(ProcessFunc) gst_audio_test_src_create_saw_int32,
(ProcessFunc) gst_audio_test_src_create_saw_float,
(ProcessFunc) gst_audio_test_src_create_saw_double
};
for (i = 0; i < src->generate_samples_per_buffer; i++) {
src->accumulator += step;
if (src->accumulator >= M_PI_M2)
src->accumulator -= M_PI_M2;
if (src->accumulator < (M_PI * 0.5)) {
samples[i] = (gint16) (src->accumulator * amp);
} else if (src->accumulator < (M_PI * 1.5)) {
samples[i] = (gint16) ((src->accumulator - M_PI) * -amp);
} else {
samples[i] = (gint16) ((M_PI_M2 - src->accumulator) * -amp);
}
}
#define DEFINE_TRIANGLE(type,scale) \
static void \
gst_audio_test_src_create_triangle_##type (GstAudioTestSrc * src, g##type * samples) \
{ \
gint i; \
gdouble step, amp; \
\
step = M_PI_M2 * src->freq / src->samplerate; \
amp = (src->volume * scale) / M_PI_2; \
\
for (i = 0; i < src->generate_samples_per_buffer; i++) { \
src->accumulator += step; \
if (src->accumulator >= M_PI_M2) \
src->accumulator -= M_PI_M2; \
\
if (src->accumulator < (M_PI * 0.5)) { \
samples[i] = (g##type) (src->accumulator * amp); \
} else if (src->accumulator < (M_PI * 1.5)) { \
samples[i] = (g##type) ((src->accumulator - M_PI) * -amp); \
} else { \
samples[i] = (g##type) ((M_PI_M2 - src->accumulator) * -amp); \
} \
} \
}
static void
gst_audio_test_src_create_silence (GstAudioTestSrc * src, gint16 * samples)
{
memset (samples, 0, src->generate_samples_per_buffer * sizeof (gint16));
DEFINE_TRIANGLE (int16, 32767.0);
DEFINE_TRIANGLE (int32, 2147483647.0);
DEFINE_TRIANGLE (float, 1.0);
DEFINE_TRIANGLE (double, 1.0);
static ProcessFunc triangle_funcs[] = {
(ProcessFunc) gst_audio_test_src_create_triangle_int16,
(ProcessFunc) gst_audio_test_src_create_triangle_int32,
(ProcessFunc) gst_audio_test_src_create_triangle_float,
(ProcessFunc) gst_audio_test_src_create_triangle_double
};
#define DEFINE_SILENCE(type) \
static void \
gst_audio_test_src_create_silence_##type (GstAudioTestSrc * src, g##type * samples) \
{ \
memset (samples, 0, src->generate_samples_per_buffer * sizeof (g##type)); \
}
static void
gst_audio_test_src_create_white_noise (GstAudioTestSrc * src, gint16 * samples)
{
gint i;
gdouble amp;
DEFINE_SILENCE (int16);
DEFINE_SILENCE (int32);
DEFINE_SILENCE (float);
DEFINE_SILENCE (double);
amp = src->volume * 65535.0;
static ProcessFunc silence_funcs[] = {
(ProcessFunc) gst_audio_test_src_create_silence_int16,
(ProcessFunc) gst_audio_test_src_create_silence_int32,
(ProcessFunc) gst_audio_test_src_create_silence_float,
(ProcessFunc) gst_audio_test_src_create_silence_double
};
for (i = 0; i < src->generate_samples_per_buffer; i++) {
samples[i] = (gint16) (32768 - (amp * rand () / (RAND_MAX + 1.0)));
}
#define DEFINE_WHITE_NOISE(type,scale) \
static void \
gst_audio_test_src_create_white_noise_##type (GstAudioTestSrc * src, g##type * samples) \
{ \
gint i; \
gdouble amp = (src->volume * scale); \
\
for (i = 0; i < src->generate_samples_per_buffer; i++) { \
samples[i] = (g##type) (amp * g_random_double_range (-1.0, 1.0)); \
} \
}
DEFINE_WHITE_NOISE (int16, 32767.0);
DEFINE_WHITE_NOISE (int32, 2147483647.0);
DEFINE_WHITE_NOISE (float, 1.0);
DEFINE_WHITE_NOISE (double, 1.0);
static ProcessFunc white_noise_funcs[] = {
(ProcessFunc) gst_audio_test_src_create_white_noise_int16,
(ProcessFunc) gst_audio_test_src_create_white_noise_int32,
(ProcessFunc) gst_audio_test_src_create_white_noise_float,
(ProcessFunc) gst_audio_test_src_create_white_noise_double
};
/* pink noise calculation is based on
* http://www.firstpr.com.au/dsp/pink-noise/phil_burk_19990905_patest_pink.c
* which has been released under public domain
@ -435,7 +547,7 @@ gst_audio_test_src_init_pink_noise (GstAudioTestSrc * src)
}
/* Generate Pink noise values between -1.0 and +1.0 */
static gfloat
static gdouble
gst_audio_test_src_generate_pink_noise_value (GstPinkNoise * pink)
{
glong new_random;
@ -475,53 +587,79 @@ gst_audio_test_src_generate_pink_noise_value (GstPinkNoise * pink)
return (pink->scalar * sum);
}
static void
gst_audio_test_src_create_pink_noise (GstAudioTestSrc * src, gint16 * samples)
{
gint i;
gdouble amp;
amp = src->volume * 32767.0;
for (i = 0; i < src->generate_samples_per_buffer; i++) {
samples[i] =
(gint16) (gst_audio_test_src_generate_pink_noise_value (&src->pink) *
amp);
}
#define DEFINE_PINK(type, scale) \
static void \
gst_audio_test_src_create_pink_noise_##type (GstAudioTestSrc * src, g##type * samples) \
{ \
gint i; \
gdouble amp; \
\
amp = src->volume * scale; \
\
for (i = 0; i < src->generate_samples_per_buffer; i++) { \
samples[i] = \
(g##type) (gst_audio_test_src_generate_pink_noise_value (&src->pink) * \
amp); \
} \
}
DEFINE_PINK (int16, 32767.0);
DEFINE_PINK (int32, 2147483647.0);
DEFINE_PINK (float, 1.0);
DEFINE_PINK (double, 1.0);
static ProcessFunc pink_noise_funcs[] = {
(ProcessFunc) gst_audio_test_src_create_pink_noise_int16,
(ProcessFunc) gst_audio_test_src_create_pink_noise_int32,
(ProcessFunc) gst_audio_test_src_create_pink_noise_float,
(ProcessFunc) gst_audio_test_src_create_pink_noise_double
};
static void
gst_audio_test_src_init_sine_table (GstAudioTestSrc * src)
{
gint i;
gdouble ang = 0.0;
gdouble step = M_PI_M2 / 1024.0;
gdouble amp = src->volume * 32767.0;
gdouble amp = src->volume;
for (i = 0; i < 1024; i++) {
src->wave_table[i] = (gint16) (sin (ang) * amp);
src->wave_table[i] = sin (ang) * amp;
ang += step;
}
}
static void
gst_audio_test_src_create_sine_table (GstAudioTestSrc * src, gint16 * samples)
{
gint i;
gdouble step, scl;
step = M_PI_M2 * src->freq / src->samplerate;
scl = 1024.0 / M_PI_M2;
for (i = 0; i < src->generate_samples_per_buffer; i++) {
src->accumulator += step;
if (src->accumulator >= M_PI_M2)
src->accumulator -= M_PI_M2;
samples[i] = src->wave_table[(gint) (src->accumulator * scl)];
}
#define DEFINE_SINE_TABLE(type,scale) \
static void \
gst_audio_test_src_create_sine_table_##type (GstAudioTestSrc * src, g##type * samples) \
{ \
gint i; \
gdouble step, scl; \
\
step = M_PI_M2 * src->freq / src->samplerate; \
scl = 1024.0 / M_PI_M2; \
\
for (i = 0; i < src->generate_samples_per_buffer; i++) { \
src->accumulator += step; \
if (src->accumulator >= M_PI_M2) \
src->accumulator -= M_PI_M2; \
\
samples[i] = (g##type) scale * src->wave_table[(gint) (src->accumulator * scl)]; \
} \
}
DEFINE_SINE_TABLE (int16, 32767.0);
DEFINE_SINE_TABLE (int32, 2147483647.0);
DEFINE_SINE_TABLE (float, 1.0);
DEFINE_SINE_TABLE (double, 1.0);
static ProcessFunc sine_table_funcs[] = {
(ProcessFunc) gst_audio_test_src_create_sine_table_int16,
(ProcessFunc) gst_audio_test_src_create_sine_table_int32,
(ProcessFunc) gst_audio_test_src_create_sine_table_float,
(ProcessFunc) gst_audio_test_src_create_sine_table_double
};
/*
* gst_audio_test_src_change_wave:
* Assign function pointer of wave genrator.
@ -529,32 +667,37 @@ gst_audio_test_src_create_sine_table (GstAudioTestSrc * src, gint16 * samples)
static void
gst_audio_test_src_change_wave (GstAudioTestSrc * src)
{
if (src->format == -1) {
src->process = NULL;
return;
}
switch (src->wave) {
case GST_AUDIO_TEST_SRC_WAVE_SINE:
src->process = gst_audio_test_src_create_sine;
src->process = sine_funcs[src->format];
break;
case GST_AUDIO_TEST_SRC_WAVE_SQUARE:
src->process = gst_audio_test_src_create_square;
src->process = square_funcs[src->format];
break;
case GST_AUDIO_TEST_SRC_WAVE_SAW:
src->process = gst_audio_test_src_create_saw;
src->process = saw_funcs[src->format];
break;
case GST_AUDIO_TEST_SRC_WAVE_TRIANGLE:
src->process = gst_audio_test_src_create_triangle;
src->process = triangle_funcs[src->format];
break;
case GST_AUDIO_TEST_SRC_WAVE_SILENCE:
src->process = gst_audio_test_src_create_silence;
src->process = silence_funcs[src->format];
break;
case GST_AUDIO_TEST_SRC_WAVE_WHITE_NOISE:
src->process = gst_audio_test_src_create_white_noise;
src->process = white_noise_funcs[src->format];
break;
case GST_AUDIO_TEST_SRC_WAVE_PINK_NOISE:
gst_audio_test_src_init_pink_noise (src);
src->process = gst_audio_test_src_create_pink_noise;
src->process = pink_noise_funcs[src->format];
break;
case GST_AUDIO_TEST_SRC_WAVE_SINE_TAB:
gst_audio_test_src_init_sine_table (src);
src->process = gst_audio_test_src_create_sine_table;
src->process = sine_table_funcs[src->format];
break;
default:
GST_ERROR ("invalid wave-form");
@ -647,6 +790,7 @@ gst_audio_test_src_create (GstBaseSrc * basesrc, guint64 offset,
GstBuffer *buf;
GstClockTime next_time;
gint64 n_samples;
gint sample_size;
src = GST_AUDIO_TEST_SRC (basesrc);
@ -686,8 +830,29 @@ gst_audio_test_src_create (GstBaseSrc * basesrc, guint64 offset,
(guint64) src->samplerate);
/* allocate a new buffer suitable for this pad */
switch (src->format) {
case GST_AUDIO_TEST_SRC_FORMAT_S16:
sample_size = sizeof (gint16);
break;
case GST_AUDIO_TEST_SRC_FORMAT_S32:
sample_size = sizeof (gint32);
break;
case GST_AUDIO_TEST_SRC_FORMAT_F32:
sample_size = sizeof (gfloat);
break;
case GST_AUDIO_TEST_SRC_FORMAT_F64:
sample_size = sizeof (gdouble);
break;
default:
sample_size = -1;
GST_ELEMENT_ERROR (src, CORE, NEGOTIATION, (NULL),
("format wasn't negotiated before get function"));
return GST_FLOW_NOT_NEGOTIATED;
break;
}
if ((res = gst_pad_alloc_buffer (basesrc->srcpad, src->n_samples,
src->generate_samples_per_buffer * sizeof (gint16),
src->generate_samples_per_buffer * sample_size,
GST_PAD_CAPS (basesrc->srcpad), &buf)) != GST_FLOW_OK) {
return res;
}
@ -701,7 +866,7 @@ gst_audio_test_src_create (GstBaseSrc * basesrc, guint64 offset,
src->running_time = next_time;
src->n_samples = n_samples;
src->process (src, (gint16 *) GST_BUFFER_DATA (buf));
src->process (src, GST_BUFFER_DATA (buf));
*buffer = buf;

17
gst/audiotestsrc/gstaudiotestsrc.h
View file

@ -71,12 +71,22 @@ typedef struct {
glong running_sum; /* Used to optimize summing of generators. */
gint index; /* Incremented each sample. */
gint index_mask; /* Index wrapped by ANDing with this mask. */
gfloat scalar; /* Used to scale within range of -1.0 to +1.0 */
gdouble scalar; /* Used to scale within range of -1.0 to +1.0 */
} GstPinkNoise;
typedef enum {
GST_AUDIO_TEST_SRC_FORMAT_NONE = -1,
GST_AUDIO_TEST_SRC_FORMAT_S16 = 0,
GST_AUDIO_TEST_SRC_FORMAT_S32,
GST_AUDIO_TEST_SRC_FORMAT_F32,
GST_AUDIO_TEST_SRC_FORMAT_F64
} GstAudioTestSrcFormat;
typedef struct _GstAudioTestSrc GstAudioTestSrc;
typedef struct _GstAudioTestSrcClass GstAudioTestSrcClass;
typedef void (*ProcessFunc) (GstAudioTestSrc*, guint8 *);
/**
* GstAudioTestSrc:
*
@ -85,7 +95,7 @@ typedef struct _GstAudioTestSrcClass GstAudioTestSrcClass;
struct _GstAudioTestSrc {
GstBaseSrc parent;
void (*process)(GstAudioTestSrc*, gint16 *);
ProcessFunc process;
/* parameters */
GstAudioTestSrcWave wave;
@ -95,6 +105,7 @@ struct _GstAudioTestSrc {
/* audio parameters */
gint samplerate;
gint samples_per_buffer;
GstAudioTestSrcFormat format;
/*< private >*/
gboolean tags_pushed; /* send tags just once ? */
@ -109,7 +120,7 @@ struct _GstAudioTestSrc {
/* waveform specific context data */
gdouble accumulator; /* phase angle */
GstPinkNoise pink;
gint16 wave_table[1024];
gdouble wave_table[1024];
};
struct _GstAudioTestSrcClass {