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flite: handle samplesperbuffer
This commit is contained in:
David Schleef
parent
43147671c1
commit
82c07135d4
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@ -24,6 +24,7 @@
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#include <gst/gst.h>
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#include <gst/base/gstbasesrc.h>
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#include <gst/base/gstadapter.h>
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#include <gst/audio/multichannel.h>
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#include <flite/flite.h>
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@ -46,10 +47,14 @@ struct _GstFliteTestSrc
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{
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GstBaseSrc parent;
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GstAdapter *adapter;
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int samplerate;
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int n_channels;
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GstAudioChannelPosition *layout;
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int samples_per_buffer;
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int channel;
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cst_voice *voice;
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@ -73,9 +78,12 @@ GST_ELEMENT_DETAILS ("Flite speech test source",
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"Creates audio test signals identifying channels",
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"David Schleef <ds@schleef.org>");
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#define DEFAULT_SAMPLES_PER_BUFFER 1024
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enum
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{
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PROP_0,
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PROP_SAMPLES_PER_BUFFER,
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PROP_LAST
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};
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@ -137,6 +145,13 @@ gst_flite_test_src_class_init (GstFliteTestSrcClass * klass)
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gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_flite_test_src_stop);
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gstbasesrc_class->create = GST_DEBUG_FUNCPTR (gst_flite_test_src_create);
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gstbasesrc_class->set_caps = GST_DEBUG_FUNCPTR (gst_flite_test_src_set_caps);
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g_object_class_install_property (gobject_class, PROP_SAMPLES_PER_BUFFER,
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g_param_spec_int ("samplesperbuffer", "Samples per buffer",
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"Number of samples in each outgoing buffer",
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1, G_MAXINT, DEFAULT_SAMPLES_PER_BUFFER,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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static void
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@ -147,6 +162,7 @@ gst_flite_test_src_init (GstFliteTestSrc * src, GstFliteTestSrcClass * g_class)
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#endif
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src->samplerate = 48000;
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src->samples_per_buffer = DEFAULT_SAMPLES_PER_BUFFER;
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/* we operate in time */
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gst_base_src_set_format (GST_BASE_SRC (src), GST_FORMAT_TIME);
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@ -294,6 +310,8 @@ gst_flite_test_src_start (GstBaseSrc * basesrc)
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{
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GstFliteTestSrc *src = GST_FLITE_TEST_SRC (basesrc);
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src->adapter = gst_adapter_new ();
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src->voice = register_cmu_us_kal ();
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src->n_channels = 2;
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@ -303,6 +321,10 @@ gst_flite_test_src_start (GstBaseSrc * basesrc)
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static gboolean
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gst_flite_test_src_stop (GstBaseSrc * basesrc)
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{
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GstFliteTestSrc *src = GST_FLITE_TEST_SRC (basesrc);
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g_object_unref (src->adapter);
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return TRUE;
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}
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@ -336,37 +358,46 @@ gst_flite_test_src_create (GstBaseSrc * basesrc, guint64 offset,
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guint length, GstBuffer ** buffer)
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{
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GstFliteTestSrc *src;
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GstBuffer *buf;
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cst_wave *wave;
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char *text;
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int i;
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gint16 *data;
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int n_bytes;
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src = GST_FLITE_TEST_SRC (basesrc);
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text = get_channel_name (src, src->channel);
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n_bytes = src->n_channels * sizeof (gint16) * src->samples_per_buffer;
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wave = flite_text_to_wave (text, src->voice);
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g_free (text);
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cst_wave_resample (wave, 48000);
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while (gst_adapter_available (src->adapter) < n_bytes) {
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GstBuffer *buf;
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char *text;
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int i;
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gint16 *data;
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cst_wave *wave;
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GST_DEBUG ("type %s, sample_rate %d, num_samples %d, num_channels %d",
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wave->type, wave->sample_rate, wave->num_samples, wave->num_channels);
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text = get_channel_name (src, src->channel);
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buf = gst_buffer_new_and_alloc (src->n_channels * sizeof (gint16) *
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wave->num_samples);
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wave = flite_text_to_wave (text, src->voice);
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g_free (text);
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cst_wave_resample (wave, 48000);
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data = (void *) GST_BUFFER_DATA (buf);
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memset (data, 0, src->n_channels * sizeof (gint16) * wave->num_samples);
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for (i = 0; i < wave->num_samples; i++) {
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data[i * src->n_channels + src->channel] = wave->samples[i];
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GST_DEBUG ("type %s, sample_rate %d, num_samples %d, num_channels %d",
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wave->type, wave->sample_rate, wave->num_samples, wave->num_channels);
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buf = gst_buffer_new_and_alloc (src->n_channels * sizeof (gint16) *
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wave->num_samples);
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data = (void *) GST_BUFFER_DATA (buf);
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memset (data, 0, src->n_channels * sizeof (gint16) * wave->num_samples);
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for (i = 0; i < wave->num_samples; i++) {
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data[i * src->n_channels + src->channel] = wave->samples[i];
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}
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src->channel++;
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if (src->channel == src->n_channels) {
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src->channel = 0;
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}
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gst_adapter_push (src->adapter, buf);
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}
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src->channel++;
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if (src->channel == src->n_channels)
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src->channel = 0;
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*buffer = buf;
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*buffer = gst_adapter_take_buffer (src->adapter, n_bytes);
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return GST_FLOW_OK;
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}
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@ -375,11 +406,12 @@ static void
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gst_flite_test_src_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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#if 0
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GstFliteTestSrc *src = GST_FLITE_TEST_SRC (object);
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#endif
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switch (prop_id) {
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case PROP_SAMPLES_PER_BUFFER:
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src->samples_per_buffer = g_value_get_int (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -390,11 +422,12 @@ static void
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gst_flite_test_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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#if 0
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GstFliteTestSrc *src = GST_FLITE_TEST_SRC (object);
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#endif
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switch (prop_id) {
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case PROP_SAMPLES_PER_BUFFER:
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g_value_set_int (value, src->samples_per_buffer);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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