diff options
Diffstat (limited to 'gst-libs/gst/signalprocessor/gstsignalprocessor.c')
| -rw-r--r-- | gst-libs/gst/signalprocessor/gstsignalprocessor.c | 1024 |
1 files changed, 1024 insertions, 0 deletions
diff --git a/gst-libs/gst/signalprocessor/gstsignalprocessor.c b/gst-libs/gst/signalprocessor/gstsignalprocessor.c new file mode 100644 index 00000000..c46ae7a8 --- /dev/null +++ b/gst-libs/gst/signalprocessor/gstsignalprocessor.c @@ -0,0 +1,1024 @@ +/* GStreamer + * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu> + * 2000 Wim Taymans <wtay@chello.be> + * 2005 Wim Taymans <wim@fluendo.com> + * + * gstsignalprocessor.c: + * + * 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., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +/* + * SECTION:gstsignalprocessor + * + * This baseclass allows to write elements that need data on all pads before + * their processing function can run. + * + * In push mode (gst_signal_processor_chain) it operates as follows: + * 1. store each received buffer on the pad and decrement pending_in + * 2. when pending_in==0, process as much as we can and push outputs + * + * In pull mode (gst_signal_processor_getrange) is operates as follows: + * 1. if there is an output ready, deliver + * 2. otherwise pull from each sink-pad, process requested frames and deliver + * the buffer + */ + +#include <stdlib.h> + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <gst/audio/audio.h> +#include "gstsignalprocessor.h" + + +GST_DEBUG_CATEGORY_STATIC (gst_signal_processor_debug); +#define GST_CAT_DEFAULT gst_signal_processor_debug + +/* FIXME: this is mono only */ +static GstStaticCaps template_caps = +GST_STATIC_CAPS (GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS); + +#define GST_TYPE_SIGNAL_PROCESSOR_PAD_TEMPLATE \ + (gst_signal_processor_pad_template_get_type ()) +#define GST_SIGNAL_PROCESSOR_PAD_TEMPLATE(obj) \ + (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SIGNAL_PROCESSOR_PAD_TEMPLATE,\ + GstSignalProcessorPadTemplate)) +typedef struct _GstSignalProcessorPadTemplate GstSignalProcessorPadTemplate; +typedef GstPadTemplateClass GstSignalProcessorPadTemplateClass; + +struct _GstSignalProcessorPadTemplate +{ + GstPadTemplate parent; + + guint index; +}; + +static GType +gst_signal_processor_pad_template_get_type (void) +{ + static GType type = 0; + + if (!type) { + static const GTypeInfo info = { + sizeof (GstSignalProcessorPadTemplateClass), NULL, NULL, NULL, NULL, + NULL, sizeof (GstSignalProcessorPadTemplate), 0, NULL + }; + + type = g_type_register_static (GST_TYPE_PAD_TEMPLATE, + "GstSignalProcessorPadTemplate", &info, 0); + } + return type; +} + +/* + * gst_signal_processor_class_add_pad_template: + * @klass: element class + * @name: pad name + * @direction: pad direction (src/sink) + * @index: index for the pad per direction (starting from 0) + * + */ +void +gst_signal_processor_class_add_pad_template (GstSignalProcessorClass * klass, + const gchar * name, GstPadDirection direction, guint index) +{ + GstPadTemplate *new; + GstCaps *caps; + + g_return_if_fail (GST_IS_SIGNAL_PROCESSOR_CLASS (klass)); + g_return_if_fail (name != NULL); + g_return_if_fail (direction == GST_PAD_SRC || direction == GST_PAD_SINK); + + /* FIXME: would be nice to have the template as a parameter, right now this can + * only create mono pads */ + caps = gst_caps_copy (gst_static_caps_get (&template_caps)); + + new = g_object_new (gst_signal_processor_pad_template_get_type (), + "name", name, "name-template", name, + "direction", direction, "presence", GST_PAD_ALWAYS, "caps", caps, NULL); + + GST_SIGNAL_PROCESSOR_PAD_TEMPLATE (new)->index = index; + + gst_element_class_add_pad_template (GST_ELEMENT_CLASS (klass), new); +} + + +#define GST_TYPE_SIGNAL_PROCESSOR_PAD (gst_signal_processor_pad_get_type ()) +#define GST_SIGNAL_PROCESSOR_PAD(obj) \ + (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SIGNAL_PROCESSOR_PAD,\ + GstSignalProcessorPad)) +typedef struct _GstSignalProcessorPad GstSignalProcessorPad; +typedef GstPadClass GstSignalProcessorPadClass; + +struct _GstSignalProcessorPad +{ + GstPad parent; + + GstBuffer *pen; + + /* index for the pad per direction (starting from 0) */ + guint index; + + /* these are only used for sink pads */ + guint samples_avail; /* available mono sample frames */ + gfloat *data; /* data pointer to read from / write to */ +}; + +static GType +gst_signal_processor_pad_get_type (void) +{ + static GType type = 0; + + if (!type) { + static const GTypeInfo info = { + sizeof (GstSignalProcessorPadClass), NULL, NULL, NULL, NULL, + NULL, sizeof (GstSignalProcessorPad), 0, NULL + }; + + type = g_type_register_static (GST_TYPE_PAD, + "GstSignalProcessorPad", &info, 0); + } + return type; +} + + +GST_BOILERPLATE (GstSignalProcessor, gst_signal_processor, GstElement, + GST_TYPE_ELEMENT); + + +static void gst_signal_processor_finalize (GObject * object); +static gboolean gst_signal_processor_src_activate_pull (GstPad * pad, + gboolean active); +static gboolean gst_signal_processor_sink_activate_push (GstPad * pad, + gboolean active); +static GstStateChangeReturn gst_signal_processor_change_state (GstElement * + element, GstStateChange transition); + +static gboolean gst_signal_processor_event (GstPad * pad, GstEvent * event); +static GstFlowReturn gst_signal_processor_getrange (GstPad * pad, + guint64 offset, guint length, GstBuffer ** buffer); +static GstFlowReturn gst_signal_processor_chain (GstPad * pad, + GstBuffer * buffer); +static gboolean gst_signal_processor_setcaps (GstPad * pad, GstCaps * caps); + + +static void +gst_signal_processor_base_init (gpointer g_class) +{ + GST_DEBUG_CATEGORY_INIT (gst_signal_processor_debug, "gst-dsp", 0, + "signalprocessor element"); +} + +static void +gst_signal_processor_class_init (GstSignalProcessorClass * klass) +{ + GObjectClass *gobject_class; + GstElementClass *gstelement_class; + + gobject_class = G_OBJECT_CLASS (klass); + gstelement_class = GST_ELEMENT_CLASS (klass); + + gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_signal_processor_finalize); + + gstelement_class->change_state = + GST_DEBUG_FUNCPTR (gst_signal_processor_change_state); +} + +static void +gst_signal_processor_add_pad_from_template (GstSignalProcessor * self, + GstPadTemplate * templ) +{ + GstPad *new; + + new = g_object_new (GST_TYPE_SIGNAL_PROCESSOR_PAD, + "name", GST_OBJECT_NAME (templ), "direction", templ->direction, + "template", templ, NULL); + GST_SIGNAL_PROCESSOR_PAD (new)->index = + GST_SIGNAL_PROCESSOR_PAD_TEMPLATE (templ)->index; + + gst_pad_set_setcaps_function (new, + GST_DEBUG_FUNCPTR (gst_signal_processor_setcaps)); + + if (templ->direction == GST_PAD_SINK) { + GST_DEBUG ("added new sink pad"); + + gst_pad_set_event_function (new, + GST_DEBUG_FUNCPTR (gst_signal_processor_event)); + gst_pad_set_chain_function (new, + GST_DEBUG_FUNCPTR (gst_signal_processor_chain)); + gst_pad_set_activatepush_function (new, + GST_DEBUG_FUNCPTR (gst_signal_processor_sink_activate_push)); + } else { + GST_DEBUG ("added new src pad"); + + gst_pad_set_getrange_function (new, + GST_DEBUG_FUNCPTR (gst_signal_processor_getrange)); + gst_pad_set_activatepull_function (new, + GST_DEBUG_FUNCPTR (gst_signal_processor_src_activate_pull)); + } + + gst_element_add_pad (GST_ELEMENT (self), new); +} + +static void +gst_signal_processor_init (GstSignalProcessor * self, + GstSignalProcessorClass * klass) +{ + GList *templates; + + templates = + gst_element_class_get_pad_template_list (GST_ELEMENT_CLASS (klass)); + + while (templates) { + GstPadTemplate *templ = GST_PAD_TEMPLATE (templates->data); + + gst_signal_processor_add_pad_from_template (self, templ); + templates = templates->next; + } + + self->state = GST_SIGNAL_PROCESSOR_STATE_NULL; + + self->audio_in = g_new0 (gfloat *, klass->num_audio_in); + self->control_in = g_new0 (gfloat, klass->num_control_in); + self->audio_out = g_new0 (gfloat *, klass->num_audio_out); + self->control_out = g_new0 (gfloat, klass->num_control_out); + + /* init */ + self->pending_in = klass->num_audio_in; + self->pending_out = 0; + + self->sample_rate = 0; +} + +static void +gst_signal_processor_finalize (GObject * object) +{ + GstSignalProcessor *self = GST_SIGNAL_PROCESSOR (object); + + g_free (self->audio_in); + self->audio_in = NULL; + g_free (self->control_in); + self->control_in = NULL; + g_free (self->audio_out); + self->audio_out = NULL; + g_free (self->control_out); + self->control_out = NULL; + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +static gboolean +gst_signal_processor_setup (GstSignalProcessor * self, guint sample_rate) +{ + GstSignalProcessorClass *klass; + gboolean ret = TRUE; + + klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self); + + GST_INFO_OBJECT (self, "setup()"); + + g_return_val_if_fail (self->state == GST_SIGNAL_PROCESSOR_STATE_NULL, FALSE); + + if (klass->setup) + ret = klass->setup (self, sample_rate); + + if (!ret) + goto setup_failed; + + self->state = GST_SIGNAL_PROCESSOR_STATE_INITIALIZED; + + return ret; + +setup_failed: + { + GST_INFO_OBJECT (self, "setup() failed at %u Hz", sample_rate); + return ret; + } +} + +static gboolean +gst_signal_processor_start (GstSignalProcessor * self) +{ + GstSignalProcessorClass *klass; + gboolean ret = TRUE; + + klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self); + + g_return_val_if_fail (self->state == GST_SIGNAL_PROCESSOR_STATE_INITIALIZED, + FALSE); + + GST_INFO_OBJECT (self, "start()"); + + if (klass->start) + ret = klass->start (self); + + if (!ret) + goto start_failed; + + self->state = GST_SIGNAL_PROCESSOR_STATE_RUNNING; + + return ret; + +start_failed: + { + GST_INFO_OBJECT (self, "start() failed"); + return ret; + } +} + +static void +gst_signal_processor_stop (GstSignalProcessor * self) +{ + GstSignalProcessorClass *klass; + GstElement *elem; + GList *sinks; + + klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self); + elem = GST_ELEMENT (self); + + GST_INFO_OBJECT (self, "stop()"); + + g_return_if_fail (self->state == GST_SIGNAL_PROCESSOR_STATE_RUNNING); + + if (klass->stop) + klass->stop (self); + + for (sinks = elem->sinkpads; sinks; sinks = sinks->next) + /* force set_caps when going to RUNNING, see note in _setcaps () */ + gst_pad_set_caps (GST_PAD (sinks->data), NULL); + + /* should also flush our buffers perhaps? */ + + self->state = GST_SIGNAL_PROCESSOR_STATE_INITIALIZED; +} + +static void +gst_signal_processor_cleanup (GstSignalProcessor * self) +{ + GstSignalProcessorClass *klass; + + klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self); + + GST_INFO_OBJECT (self, "cleanup()"); + + g_return_if_fail (self->state == GST_SIGNAL_PROCESSOR_STATE_INITIALIZED); + + if (klass->cleanup) + klass->cleanup (self); + + self->state = GST_SIGNAL_PROCESSOR_STATE_NULL; +} + +static gboolean +gst_signal_processor_setcaps_pull (GstSignalProcessor * self, GstPad * pad, + GstCaps * caps) +{ + if (GST_PAD_IS_SRC (pad)) { + GList *l; + + for (l = GST_ELEMENT (self)->sinkpads; l; l = l->next) + if (!gst_pad_set_caps (GST_PAD (l->data), caps)) + goto src_setcaps_failed; + } else { + GstPad *peer; + gboolean res; + + peer = gst_pad_get_peer (pad); + if (!peer) + goto unlinked_sink; + + res = gst_pad_set_caps (peer, caps); + gst_object_unref (peer); + + if (!res) + goto peer_setcaps_failed; + } + + return TRUE; + +src_setcaps_failed: + { + /* not logging, presumably the sink pad already logged */ + return FALSE; + } +unlinked_sink: + { + GST_WARNING_OBJECT (self, "unlinked sink pad %" GST_PTR_FORMAT ", I wonder " + "how we passed activate_pull()", pad); + return FALSE; + } +peer_setcaps_failed: + { + GST_INFO_OBJECT (self, "peer of %" GST_PTR_FORMAT " did not accept caps", + pad); + return FALSE; + } +} + +static gboolean +gst_signal_processor_setcaps (GstPad * pad, GstCaps * caps) +{ + GstSignalProcessor *self; + + self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad)); + + if (self->mode == GST_ACTIVATE_PULL && !gst_caps_is_equal (caps, self->caps) + && !gst_signal_processor_setcaps_pull (self, pad, caps)) + goto setcaps_pull_failed; + + /* the whole processor has one caps; if the sample rate changes, let subclass + implementations know */ + if (!gst_caps_is_equal (caps, self->caps)) { + GstStructure *s; + gint sample_rate; + + GST_DEBUG_OBJECT (pad, "got caps %" GST_PTR_FORMAT, caps); + + s = gst_caps_get_structure (caps, 0); + if (!gst_structure_get_int (s, "rate", &sample_rate)) { + GST_WARNING ("got no sample-rate"); + goto impossible; + } + + GST_DEBUG_OBJECT (self, "Got rate=%d", sample_rate); + + if (GST_SIGNAL_PROCESSOR_IS_RUNNING (self)) + gst_signal_processor_stop (self); + if (GST_SIGNAL_PROCESSOR_IS_INITIALIZED (self)) + gst_signal_processor_cleanup (self); + + if (!gst_signal_processor_setup (self, sample_rate)) + goto start_or_setup_failed; + + self->sample_rate = sample_rate; + gst_caps_replace (&self->caps, caps); + } else { + GST_DEBUG_OBJECT (self, "skipping, have caps already"); + } + + /* we use this method to manage the processor's state, hence the caps clearing + in stop(). so it can be that we enter here just to manage the processor's + state, to take it to RUNNING from already being INITIALIZED with the right + sample rate (e.g., when having gone PLAYING->READY->PLAYING). make sure + when we leave that the processor is RUNNING. */ + if (!GST_SIGNAL_PROCESSOR_IS_INITIALIZED (self) + && !gst_signal_processor_setup (self, self->sample_rate)) + goto start_or_setup_failed; + if (!GST_SIGNAL_PROCESSOR_IS_RUNNING (self) + && !gst_signal_processor_start (self)) + goto start_or_setup_failed; + + gst_object_unref (self); + + return TRUE; + +start_or_setup_failed: + { + gst_object_unref (self); + return FALSE; + } +setcaps_pull_failed: + { + gst_object_unref (self); + return FALSE; + } +impossible: + { + g_critical ("something impossible happened"); + gst_object_unref (self); + return FALSE; + } +} + +static gboolean +gst_signal_processor_event (GstPad * pad, GstEvent * event) +{ + GstSignalProcessor *self; + GstSignalProcessorClass *bclass; + gboolean ret; + + self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad)); + bclass = GST_SIGNAL_PROCESSOR_GET_CLASS (self); + + /* FIXME, this probably isn't the correct interface: what about return values, + * what about overriding event_default + * Sync with GstBaseTransform::gst_base_transform_sink_event */ + if (bclass->event) + bclass->event (self, event); + + switch (GST_EVENT_TYPE (event)) { + case GST_EVENT_FLUSH_START: + break; + case GST_EVENT_FLUSH_STOP: + /* clear errors now */ + self->flow_state = GST_FLOW_OK; + break; + default: + break; + } + ret = gst_pad_event_default (pad, event); + + gst_object_unref (self); + + return ret; +} + +static guint +gst_signal_processor_prepare (GstSignalProcessor * self, guint nframes) +{ + GstElement *elem = (GstElement *) self; + GstSignalProcessorClass *klass; + GList *sinks, *srcs; + guint samples_avail = nframes; + + klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self); + + /* first, assign audio_in pointers, and determine the number of samples that + * we can process */ + for (sinks = elem->sinkpads; sinks; sinks = sinks->next) { + GstSignalProcessorPad *sinkpad; + + sinkpad = (GstSignalProcessorPad *) sinks->data; + g_assert (sinkpad->samples_avail > 0); + samples_avail = MIN (samples_avail, sinkpad->samples_avail); + self->audio_in[sinkpad->index] = sinkpad->data; + } + + /* FIXME: return if samples_avail==0 ? */ + + /* now assign output buffers. we can avoid allocation by reusing input + buffers, but only if process() can work in place, and if the input buffer + is the exact size of the number of samples we are processing. */ + sinks = elem->sinkpads; + srcs = elem->srcpads; + if (GST_SIGNAL_PROCESSOR_CLASS_CAN_PROCESS_IN_PLACE (klass)) { + while (sinks && srcs) { + GstSignalProcessorPad *sinkpad, *srcpad; + + sinkpad = (GstSignalProcessorPad *) sinks->data; + srcpad = (GstSignalProcessorPad *) srcs->data; + + if (GST_BUFFER_SIZE (sinkpad->pen) == samples_avail * sizeof (gfloat)) { + /* reusable, yay */ + g_assert (sinkpad->samples_avail == samples_avail); + srcpad->pen = sinkpad->pen; + sinkpad->pen = NULL; + self->audio_out[srcpad->index] = sinkpad->data; + self->pending_out++; + + srcs = srcs->next; + } + + sinks = sinks->next; + } + } + + g_return_val_if_fail (GST_SIGNAL_PROCESSOR_IS_RUNNING (self), 0); + + /* now allocate for any remaining outputs */ + while (srcs) { + GstSignalProcessorPad *srcpad; + GstFlowReturn ret; + + srcpad = (GstSignalProcessorPad *) srcs->data; + + ret = + gst_pad_alloc_buffer_and_set_caps (GST_PAD (srcpad), -1, + samples_avail * sizeof (gfloat), self->caps, &srcpad->pen); + + if (ret != GST_FLOW_OK) { + self->flow_state = ret; + return 0; + } else { + self->audio_out[srcpad->index] = (gfloat *) GST_BUFFER_DATA (srcpad->pen); + self->pending_out++; + } + + srcs = srcs->next; + } + + return samples_avail; +} + +static void +gst_signal_processor_update_inputs (GstSignalProcessor * self, guint nprocessed) +{ + GstElement *elem = (GstElement *) self; + GList *sinks; + + for (sinks = elem->sinkpads; sinks; sinks = sinks->next) { + GstSignalProcessorPad *sinkpad; + + sinkpad = (GstSignalProcessorPad *) sinks->data; + g_assert (sinkpad->samples_avail >= nprocessed); + + if (sinkpad->pen && sinkpad->samples_avail == nprocessed) { + /* used up this buffer, unpen */ + gst_buffer_unref (sinkpad->pen); + sinkpad->pen = NULL; + } + + if (!sinkpad->pen) { + /* this buffer was used up */ + self->pending_in++; + sinkpad->data = NULL; + sinkpad->samples_avail = 0; + } else { + /* advance ->data pointers and decrement ->samples_avail, unreffing buffer + if no samples are left */ + sinkpad->samples_avail -= nprocessed; + sinkpad->data += nprocessed; /* gfloat* arithmetic */ + } + } +} + +static void +gst_signal_processor_process (GstSignalProcessor * self, guint nframes) +{ + GstElement *elem; + GstSignalProcessorClass *klass; + + /* check if we have buffers enqueued */ + g_return_if_fail (self->pending_in == 0); + g_return_if_fail (self->pending_out == 0); + + elem = GST_ELEMENT (self); + + /* check how much input is available and prepare output buffers */ + nframes = gst_signal_processor_prepare (self, nframes); + if (G_UNLIKELY (nframes == 0)) + goto flow_error; + + klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self); + + GST_LOG_OBJECT (self, "process(%u)", nframes); + + klass->process (self, nframes); + + gst_signal_processor_update_inputs (self, nframes); + + return; + +flow_error: + { + GST_WARNING ("gst_pad_alloc_buffer_and_set_caps() returned %d", + self->flow_state); + return; + } +} + +static void +gst_signal_processor_pen_buffer (GstSignalProcessor * self, GstPad * pad, + GstBuffer * buffer) +{ + GstSignalProcessorPad *spad = (GstSignalProcessorPad *) pad; + + if (spad->pen) + goto had_buffer; + + /* keep the reference */ + spad->pen = buffer; + spad->data = (gfloat *) GST_BUFFER_DATA (buffer); + spad->samples_avail = GST_BUFFER_SIZE (buffer) / sizeof (float); + + g_assert (self->pending_in != 0); + + self->pending_in--; + + return; + + /* ERRORS */ +had_buffer: + { + GST_WARNING ("Pad %s:%s already has penned buffer", + GST_DEBUG_PAD_NAME (pad)); + gst_buffer_unref (buffer); + return; + } +} + +static void +gst_signal_processor_flush (GstSignalProcessor * self) +{ + GList *pads; + GstSignalProcessorClass *klass; + + klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self); + + GST_INFO_OBJECT (self, "flush()"); + + /* release enqueued buffers */ + for (pads = GST_ELEMENT (self)->pads; pads; pads = pads->next) { + GstSignalProcessorPad *spad = (GstSignalProcessorPad *) pads->data; + + if (spad->pen) { + gst_buffer_unref (spad->pen); + spad->pen = NULL; + spad->data = NULL; + spad->samples_avail = 0; + } + } + + /* no outputs prepared and inputs for each pad needed */ + self->pending_out = 0; + self->pending_in = klass->num_audio_in; +} + +static void +gst_signal_processor_do_pulls (GstSignalProcessor * self, guint nframes) +{ + GList *sinkpads; + + /* FIXME: not threadsafe atm */ + + sinkpads = GST_ELEMENT (self)->sinkpads; + + for (; sinkpads; sinkpads = sinkpads->next) { + GstSignalProcessorPad *spad = (GstSignalProcessorPad *) sinkpads->data; + GstFlowReturn ret = GST_FLOW_OK; + GstBuffer *buf; + + if (spad->pen) { + g_warning ("Unexpectedly full buffer pen for pad %s:%s", + GST_DEBUG_PAD_NAME (spad)); + continue; + } + + ret = + gst_pad_pull_range (GST_PAD (spad), -1, nframes * sizeof (gfloat), + &buf); + + if (ret != GST_FLOW_OK) { + gst_signal_processor_flush (self); + self->flow_state = ret; + return; + } else if (!buf) { + g_critical ("Pull failed to make a buffer!"); + self->flow_state = GST_FLOW_ERROR; + return; + } else { + gst_signal_processor_pen_buffer (self, GST_PAD (spad), buf); + } + } + + if (self->pending_in != 0) { + g_critical ("Something wierd happened..."); + self->flow_state = GST_FLOW_ERROR; + } else { + gst_signal_processor_process (self, nframes); + } +} + +static GstFlowReturn +gst_signal_processor_getrange (GstPad * pad, guint64 offset, + guint length, GstBuffer ** buffer) +{ + GstSignalProcessor *self; + GstSignalProcessorPad *spad = (GstSignalProcessorPad *) pad; + GstFlowReturn ret = GST_FLOW_ERROR; + + self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad)); + + if (spad->pen) { + *buffer = spad->pen; + spad->pen = NULL; + g_assert (self->pending_out != 0); + self->pending_out--; + ret = GST_FLOW_OK; + } else { + gst_signal_processor_do_pulls (self, length / sizeof (gfloat)); + if (!spad->pen) { + /* this is an error condition */ + *buffer = NULL; + ret = self->flow_state; + } else { + *buffer = spad->pen; + spad->pen = NULL; + self->pending_out--; + ret = GST_FLOW_OK; + } + } + + GST_DEBUG_OBJECT (self, "returns %s", gst_flow_get_name (ret)); + + gst_object_unref (self); + + return ret; +} + +static void +gst_signal_processor_do_pushes (GstSignalProcessor * self) +{ + GList *srcpads; + + /* not threadsafe atm */ + + srcpads = GST_ELEMENT (self)->srcpads; + + for (; srcpads; srcpads = srcpads->next) { + GstSignalProcessorPad *spad = (GstSignalProcessorPad *) srcpads->data; + GstFlowReturn ret = GST_FLOW_OK; + GstBuffer *buffer; + + if (!spad->pen) { + g_warning ("Unexpectedly empty buffer pen for pad %s:%s", + GST_DEBUG_PAD_NAME (spad)); + continue; + } + + /* take buffer from pen */ + buffer = spad->pen; + spad->pen = NULL; + + ret = gst_pad_push (GST_PAD (spad), buffer); + + if (ret != GST_FLOW_OK) { + gst_signal_processor_flush (self); + self->flow_state = ret; + return; + } else { + g_assert (self->pending_out > 0); + self->pending_out--; + } + } + + if (self->pending_out != 0) { + g_critical ("Something wierd happened..."); + self->flow_state = GST_FLOW_ERROR; + } +} + +static GstFlowReturn +gst_signal_processor_chain (GstPad * pad, GstBuffer * buffer) +{ + GstSignalProcessor *self; + + self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad)); + + gst_signal_processor_pen_buffer (self, pad, buffer); + + if (self->pending_in == 0) { + gst_signal_processor_process (self, G_MAXUINT); + + gst_signal_processor_do_pushes (self); + } + + gst_object_unref (self); + + return self->flow_state; +} + +static gboolean +gst_signal_processor_sink_activate_push (GstPad * pad, gboolean active) +{ + gboolean result = TRUE; + GstSignalProcessor *self; + GstSignalProcessorClass *bclass; + + self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad)); + bclass = GST_SIGNAL_PROCESSOR_GET_CLASS (self); + + if (active) { + if (self->mode == GST_ACTIVATE_NONE) { + self->mode = GST_ACTIVATE_PUSH; + result = TRUE; + } else if (self->mode == GST_ACTIVATE_PUSH) { + result = TRUE; + } else { + g_warning ("foo"); + result = FALSE; + } + } else { + if (self->mode == GST_ACTIVATE_NONE) { + result = TRUE; + } else if (self->mode == GST_ACTIVATE_PUSH) { + self->mode = GST_ACTIVATE_NONE; + result = TRUE; + } else { + g_warning ("foo"); + result = FALSE; + } + } + + GST_DEBUG_OBJECT (self, "result : %d", result); + + gst_object_unref (self); + + return result; +} + +static gboolean +gst_signal_processor_src_activate_pull (GstPad * pad, gboolean active) +{ + gboolean result = TRUE; + GstSignalProcessor *self; + GstSignalProcessorClass *bclass; + + self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad)); + bclass = GST_SIGNAL_PROCESSOR_GET_CLASS (self); + + if (active) { + if (self->mode == GST_ACTIVATE_NONE) { + GList *l; + + for (l = GST_ELEMENT (self)->sinkpads; l; l = l->next) + result &= gst_pad_activate_pull (pad, active); + if (result) + self->mode = GST_ACTIVATE_PULL; + } else if (self->mode == GST_ACTIVATE_PULL) { + result = TRUE; + } else { + g_warning ("foo"); + result = FALSE; + } + } else { + if (self->mode == GST_ACTIVATE_NONE) { + result = TRUE; + } else if (self->mode == GST_ACTIVATE_PULL) { + GList *l; + + for (l = GST_ELEMENT (self)->sinkpads; l; l = l->next) + result &= gst_pad_activate_pull (pad, active); + if (result) + self->mode = GST_ACTIVATE_NONE; + result = TRUE; + } else { + g_warning ("foo"); + result = FALSE; + } + } + + GST_DEBUG_OBJECT (self, "result : %d", result); + + gst_object_unref (self); + + return result; +} + +static GstStateChangeReturn +gst_signal_processor_change_state (GstElement * element, + GstStateChange transition) +{ + GstSignalProcessor *self; + GstStateChangeReturn result; + + self = GST_SIGNAL_PROCESSOR (element); + + switch (transition) { + case GST_STATE_CHANGE_NULL_TO_READY: + break; + case GST_STATE_CHANGE_READY_TO_PAUSED: + self->flow_state = GST_FLOW_OK; + break; + case GST_STATE_CHANGE_PAUSED_TO_PLAYING: + break; + default: + break; + } + + if ((result = + GST_ELEMENT_CLASS (parent_class)->change_state (element, + transition)) == GST_STATE_CHANGE_FAILURE) + goto failure; + + switch (transition) { + case GST_STATE_CHANGE_PLAYING_TO_PAUSED: + break; + case GST_STATE_CHANGE_PAUSED_TO_READY: + if (GST_SIGNAL_PROCESSOR_IS_RUNNING (self)) + gst_signal_processor_stop (self); + gst_signal_processor_flush (self); + break; + case GST_STATE_CHANGE_READY_TO_NULL: + if (GST_SIGNAL_PROCESSOR_IS_INITIALIZED (self)) + gst_signal_processor_cleanup (self); + break; + default: + break; + } + + return result; + + /* ERRORS */ +failure: + { + GST_DEBUG_OBJECT (element, "parent failed state change"); + return result; + } +} |