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audiofxbasefirfilter: Rename some variables and change comments

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This commit is contained in:
Sebastian Dröge 2009-11-25 17:39:53 +01:00
parent 742a7c7f50
commit c57be62881
2 changed files with 38 additions and 37 deletions
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66
gst/audiofx/audiofxbasefirfilter.c
View file

@ -78,9 +78,9 @@ gst_audio_fx_base_fir_filter_dispose (GObject * object)
{
GstAudioFXBaseFIRFilter *self = GST_AUDIO_FX_BASE_FIR_FILTER (object);
if (self->residue) {
g_free (self->residue);
self->residue = NULL;
if (self->buffer) {
g_free (self->buffer);
self->buffer = NULL;
}
if (self->kernel) {
@ -124,7 +124,7 @@ gst_audio_fx_base_fir_filter_init (GstAudioFXBaseFIRFilter * self,
GstAudioFXBaseFIRFilterClass * g_class)
{
self->kernel = NULL;
self->residue = NULL;
self->buffer = NULL;
self->next_ts = GST_CLOCK_TIME_NONE;
self->next_off = GST_BUFFER_OFFSET_NONE;
@ -152,7 +152,7 @@ process_##width (GstAudioFXBaseFIRFilter * self, const g##ctype * src, g##ctype
for (j = 0; j < kernel_length; j++) \
if (l < j) \
dst[i] += \
self->residue[(kernel_length + l - j) * channels + \
self->buffer[(kernel_length + l - j) * channels + \
k] * self->kernel[j]; \
else \
dst[i] += src[(l - j) * channels + k] * self->kernel[j]; \
@ -167,13 +167,13 @@ process_##width (GstAudioFXBaseFIRFilter * self, const g##ctype * src, g##ctype
res_start = 0; \
\
for (i = 0; i < res_start; i++) \
self->residue[i] = self->residue[i + input_samples]; \
self->buffer[i] = self->buffer[i + input_samples]; \
for (i = res_start; i < kernel_length * channels; i++) \
self->residue[i] = src[input_samples - kernel_length * channels + i]; \
self->buffer[i] = src[input_samples - kernel_length * channels + i]; \
\
self->residue_length += kernel_length * channels - res_start; \
if (self->residue_length > kernel_length * channels) \
self->residue_length = kernel_length * channels; \
self->buffer_fill += kernel_length * channels - res_start; \
if (self->buffer_fill > kernel_length * channels) \
self->buffer_fill = kernel_length * channels; \
}
DEFINE_PROCESS_FUNC (32, float);
@ -193,23 +193,23 @@ gst_audio_fx_base_fir_filter_push_residue (GstAudioFXBaseFIRFilter * self)
guint8 *in, *out;
if (channels == 0 || rate == 0) {
self->residue_length = 0;
self->buffer_fill = 0;
return;
}
/* Calculate the number of samples and their memory size that
* should be pushed from the residue */
outsamples = MIN (self->latency, self->residue_length / channels);
outsamples = MIN (self->latency, self->buffer_fill / channels);
outsize = outsamples * channels * (GST_AUDIO_FILTER (self)->format.width / 8);
if (outsize == 0) {
self->residue_length = 0;
self->buffer_fill = 0;
return;
}
/* Process the difference between latency and residue_length samples
* to start at the actual data instead of starting at the zeros before
* when we only got one buffer smaller than latency */
diffsamples = self->latency - self->residue_length / channels;
diffsamples = self->latency - self->buffer_fill / channels;
diffsize =
diffsamples * channels * (GST_AUDIO_FILTER (self)->format.width / 8);
if (diffsize > 0) {
@ -226,7 +226,7 @@ gst_audio_fx_base_fir_filter_push_residue (GstAudioFXBaseFIRFilter * self)
if (G_UNLIKELY (res != GST_FLOW_OK)) {
GST_WARNING_OBJECT (self, "failed allocating buffer of %d bytes", outsize);
self->residue_length = 0;
self->buffer_fill = 0;
return;
}
@ -264,7 +264,7 @@ gst_audio_fx_base_fir_filter_push_residue (GstAudioFXBaseFIRFilter * self)
GST_WARNING_OBJECT (self, "failed to push residue");
}
self->residue_length = 0;
self->buffer_fill = 0;
}
/* GstAudioFilter vmethod implementations */
@ -277,11 +277,11 @@ gst_audio_fx_base_fir_filter_setup (GstAudioFilter * base,
GstAudioFXBaseFIRFilter *self = GST_AUDIO_FX_BASE_FIR_FILTER (base);
gboolean ret = TRUE;
if (self->residue) {
if (self->buffer) {
gst_audio_fx_base_fir_filter_push_residue (self);
g_free (self->residue);
self->residue = NULL;
self->residue_length = 0;
g_free (self->buffer);
self->buffer = NULL;
self->buffer_fill = 0;
self->next_ts = GST_CLOCK_TIME_NONE;
self->next_off = GST_BUFFER_OFFSET_NONE;
}
@ -322,18 +322,18 @@ gst_audio_fx_base_fir_filter_transform (GstBaseTransform * base,
g_return_val_if_fail (self->kernel != NULL, GST_FLOW_ERROR);
g_return_val_if_fail (channels != 0, GST_FLOW_ERROR);
if (!self->residue)
self->residue = g_new0 (gdouble, self->kernel_length * channels);
if (!self->buffer)
self->buffer = g_new0 (gdouble, self->kernel_length * channels);
/* Reset the residue if already existing on discont buffers */
if (GST_BUFFER_IS_DISCONT (inbuf) || (GST_CLOCK_TIME_IS_VALID (self->next_ts)
&& timestamp - gst_util_uint64_scale (MIN (self->latency,
self->residue_length / channels), GST_SECOND,
self->buffer_fill / channels), GST_SECOND,
rate) - self->next_ts > 5 * GST_MSECOND)) {
GST_DEBUG_OBJECT (self, "Discontinuity detected - flushing");
if (GST_CLOCK_TIME_IS_VALID (self->next_ts))
gst_audio_fx_base_fir_filter_push_residue (self);
self->residue_length = 0;
self->buffer_fill = 0;
self->next_ts = timestamp;
self->next_off = GST_BUFFER_OFFSET (inbuf);
} else if (!GST_CLOCK_TIME_IS_VALID (self->next_ts)) {
@ -343,7 +343,7 @@ gst_audio_fx_base_fir_filter_transform (GstBaseTransform * base,
/* Calculate the number of samples we can push out now without outputting
* latency zeros in the beginning */
diff = self->latency * channels - self->residue_length;
diff = self->latency * channels - self->buffer_fill;
if (diff > 0)
output_samples -= diff;
@ -388,7 +388,7 @@ gst_audio_fx_base_fir_filter_start (GstBaseTransform * base)
{
GstAudioFXBaseFIRFilter *self = GST_AUDIO_FX_BASE_FIR_FILTER (base);
self->residue_length = 0;
self->buffer_fill = 0;
self->next_ts = GST_CLOCK_TIME_NONE;
self->next_off = GST_BUFFER_OFFSET_NONE;
@ -400,8 +400,8 @@ gst_audio_fx_base_fir_filter_stop (GstBaseTransform * base)
{
GstAudioFXBaseFIRFilter *self = GST_AUDIO_FX_BASE_FIR_FILTER (base);
g_free (self->residue);
self->residue = NULL;
g_free (self->buffer);
self->buffer = NULL;
return TRUE;
}
@ -497,24 +497,24 @@ gst_audio_fx_base_fir_filter_set_kernel (GstAudioFXBaseFIRFilter * self,
g_return_if_fail (self != NULL);
GST_BASE_TRANSFORM_LOCK (self);
if (self->residue) {
if (self->buffer) {
gst_audio_fx_base_fir_filter_push_residue (self);
self->next_ts = GST_CLOCK_TIME_NONE;
self->next_off = GST_BUFFER_OFFSET_NONE;
self->residue_length = 0;
self->buffer_fill = 0;
}
g_free (self->kernel);
g_free (self->residue);
g_free (self->buffer);
self->kernel = kernel;
self->kernel_length = kernel_length;
if (GST_AUDIO_FILTER (self)->format.channels) {
self->residue =
self->buffer =
g_new0 (gdouble,
kernel_length * GST_AUDIO_FILTER (self)->format.channels);
self->residue_length = 0;
self->buffer_fill = 0;
}
if (self->latency != latency) {

9
gst/audiofx/audiofxbasefirfilter.h
View file

@ -57,10 +57,11 @@ struct _GstAudioFXBaseFIRFilter {
/* < private > */
GstAudioFXBaseFIRFilterProcessFunc process;
gdouble *kernel; /* filter kernel */
guint kernel_length; /* length of the filter kernel */
gdouble *residue; /* buffer for left-over samples from previous buffer */
guint residue_length;
gdouble *kernel; /* filter kernel -- time domain */
guint kernel_length; /* length of the filter kernel -- time domain */
gdouble *buffer; /* buffer for storing samples of previous buffers */
guint buffer_fill; /* fill level of buffer */
guint64 latency;