/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans * 2005 Wim Taymans * 2007 Andy Wingo * 2008 Sebastian Dröge * * deinterleave.c: deinterleave samples * * 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. */ /* TODO: * - handle changes in number of channels * - handle changes in channel positions * - better capsnego by using a buffer alloc function * and passing downstream caps changes upstream there */ /** * SECTION:element-deinterleave * @see_also: interleave * * Splits one interleaved multichannel audio stream into many mono audio streams. * * This element handles all raw audio formats and supports changing the input caps as long as * all downstream elements can handle the new caps and the number of channels and the channel * positions stay the same. This restriction will be removed in later versions by adding or * removing some source pads as required. * * In most cases a queue and an audioconvert element should be added after each source pad * before further processing of the audio data. * * * Example launch line * |[ * gst-launch filesrc location=/path/to/file.mp3 ! decodebin ! audioconvert ! "audio/x-raw-int,channels=2 ! deinterleave name=d d.src0 ! queue ! audioconvert ! vorbisenc ! oggmux ! filesink location=channel1.ogg d.src1 ! queue ! audioconvert ! vorbisenc ! oggmux ! filesink location=channel2.ogg * ]| Decodes an MP3 file and encodes the left and right channel into separate * Ogg Vorbis files. * |[ * gst-launch filesrc location=file.mp3 ! decodebin ! audioconvert ! "audio/x-raw-int,channels=2" ! deinterleave name=d interleave name=i ! audioconvert ! wavenc ! filesink location=test.wav d.src0 ! queue ! audioconvert ! i.sink1 d.src1 ! queue ! audioconvert ! i.sink0 * ]| Decodes and deinterleaves a Stereo MP3 file into separate channels and * then interleaves the channels again to a WAV file with the channel with the * channels exchanged. * */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include "deinterleave.h" GST_DEBUG_CATEGORY_STATIC (gst_deinterleave_debug); #define GST_CAT_DEFAULT gst_deinterleave_debug static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src%d", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS ("audio/x-raw-int, " "rate = (int) [ 1, MAX ], " "channels = (int) 1, " "endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, " "width = (int) { 8, 16, 24, 32 }, " "depth = (int) [ 1, 32 ], " "signed = (boolean) { true, false }; " "audio/x-raw-float, " "rate = (int) [ 1, MAX ], " "channels = (int) 1, " "endianness = (int) { LITTLE_ENDIAN , BIG_ENDIAN }, " "width = (int) { 32, 64 }") ); static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-raw-int, " "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, MAX ], " "endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, " "width = (int) { 8, 16, 24, 32 }, " "depth = (int) [ 1, 32 ], " "signed = (boolean) { true, false }; " "audio/x-raw-float, " "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, MAX ], " "endianness = (int) { LITTLE_ENDIAN , BIG_ENDIAN }, " "width = (int) { 32, 64 }") ); #define MAKE_FUNC(type) \ static void deinterleave_##type (guint##type *out, guint##type *in, \ guint stride, guint nframes) \ { \ gint i; \ \ for (i = 0; i < nframes; i++) { \ out[i] = *in; \ in += stride; \ } \ } MAKE_FUNC (8); MAKE_FUNC (16); MAKE_FUNC (32); MAKE_FUNC (64); static void deinterleave_24 (guint8 * out, guint8 * in, guint stride, guint nframes) { gint i; for (i = 0; i < nframes; i++) { memcpy (out, in, 3); out += 3; in += stride * 3; } } GST_BOILERPLATE (GstDeinterleave, gst_deinterleave, GstElement, GST_TYPE_ELEMENT); enum { PROP_0, PROP_KEEP_POSITIONS }; static GstFlowReturn gst_deinterleave_chain (GstPad * pad, GstBuffer * buffer); static gboolean gst_deinterleave_sink_setcaps (GstPad * pad, GstCaps * caps); static GstCaps *gst_deinterleave_sink_getcaps (GstPad * pad); static gboolean gst_deinterleave_sink_activate_push (GstPad * pad, gboolean active); static gboolean gst_deinterleave_sink_event (GstPad * pad, GstEvent * event); static gboolean gst_deinterleave_src_query (GstPad * pad, GstQuery * query); static void gst_deinterleave_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_deinterleave_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_deinterleave_finalize (GObject * obj) { GstDeinterleave *self = GST_DEINTERLEAVE (obj); if (self->pos) { g_free (self->pos); self->pos = NULL; } if (self->pending_events) { g_list_foreach (self->pending_events, (GFunc) gst_mini_object_unref, NULL); g_list_free (self->pending_events); self->pending_events = NULL; } G_OBJECT_CLASS (parent_class)->finalize (obj); } static void gst_deinterleave_base_init (gpointer g_class) { GstElementClass *gstelement_class = (GstElementClass *) g_class; gst_element_class_set_details_simple (gstelement_class, "Audio deinterleaver", "Filter/Converter/Audio", "Splits one interleaved multichannel audio stream into many mono audio streams", "Andy Wingo , " "Iain , " "Sebastian Dröge "); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&sink_template)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&src_template)); } static void gst_deinterleave_class_init (GstDeinterleaveClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GST_DEBUG_CATEGORY_INIT (gst_deinterleave_debug, "deinterleave", 0, "deinterleave element"); gobject_class->finalize = gst_deinterleave_finalize; gobject_class->set_property = gst_deinterleave_set_property; gobject_class->get_property = gst_deinterleave_get_property; /** * GstDeinterleave:keep-positions * * Keep positions: When enable the caps on the output buffers will * contain the original channel positions. This can be used to correctly * interleave the output again later but can also lead to unwanted effects * if the output should be handled as Mono. * */ g_object_class_install_property (gobject_class, PROP_KEEP_POSITIONS, g_param_spec_boolean ("keep-positions", "Keep positions", "Keep the original channel positions on the output buffers", FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); } static void gst_deinterleave_init (GstDeinterleave * self, GstDeinterleaveClass * klass) { self->channels = 0; self->pos = NULL; self->keep_positions = FALSE; self->width = 0; self->func = NULL; /* Add sink pad */ self->sink = gst_pad_new_from_static_template (&sink_template, "sink"); gst_pad_set_chain_function (self->sink, GST_DEBUG_FUNCPTR (gst_deinterleave_chain)); gst_pad_set_setcaps_function (self->sink, GST_DEBUG_FUNCPTR (gst_deinterleave_sink_setcaps)); gst_pad_set_getcaps_function (self->sink, GST_DEBUG_FUNCPTR (gst_deinterleave_sink_getcaps)); gst_pad_set_activatepush_function (self->sink, GST_DEBUG_FUNCPTR (gst_deinterleave_sink_activate_push)); gst_pad_set_event_function (self->sink, GST_DEBUG_FUNCPTR (gst_deinterleave_sink_event)); gst_element_add_pad (GST_ELEMENT (self), self->sink); } static void gst_deinterleave_add_new_pads (GstDeinterleave * self, GstCaps * caps) { GstPad *pad; guint i; for (i = 0; i < self->channels; i++) { gchar *name = g_strdup_printf ("src%d", i); GstCaps *srccaps; GstStructure *s; pad = gst_pad_new_from_static_template (&src_template, name); g_free (name); /* Set channel position if we know it */ if (self->keep_positions) { GstAudioChannelPosition pos[1] = { GST_AUDIO_CHANNEL_POSITION_NONE }; srccaps = gst_caps_copy (caps); s = gst_caps_get_structure (srccaps, 0); if (self->pos) gst_audio_set_channel_positions (s, &self->pos[i]); else gst_audio_set_channel_positions (s, pos); } else { srccaps = caps; } gst_pad_set_caps (pad, srccaps); gst_pad_use_fixed_caps (pad); gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_deinterleave_src_query)); gst_pad_set_active (pad, TRUE); gst_element_add_pad (GST_ELEMENT (self), pad); self->srcpads = g_list_prepend (self->srcpads, gst_object_ref (pad)); if (self->keep_positions) gst_caps_unref (srccaps); } gst_element_no_more_pads (GST_ELEMENT (self)); self->srcpads = g_list_reverse (self->srcpads); } static void gst_deinterleave_set_pads_caps (GstDeinterleave * self, GstCaps * caps) { GList *l; GstStructure *s; gint i; for (l = self->srcpads, i = 0; l; l = l->next, i++) { GstPad *pad = GST_PAD (l->data); GstCaps *srccaps; /* Set channel position if we know it */ if (self->keep_positions) { GstAudioChannelPosition pos[1] = { GST_AUDIO_CHANNEL_POSITION_NONE }; srccaps = gst_caps_copy (caps); s = gst_caps_get_structure (srccaps, 0); if (self->pos) gst_audio_set_channel_positions (s, &self->pos[i]); else gst_audio_set_channel_positions (s, pos); } else { srccaps = caps; } gst_pad_set_caps (pad, srccaps); if (self->keep_positions) gst_caps_unref (srccaps); } } static void gst_deinterleave_remove_pads (GstDeinterleave * self) { GList *l; GST_INFO_OBJECT (self, "removing pads"); for (l = self->srcpads; l; l = l->next) { GstPad *pad = GST_PAD (l->data); gst_element_remove_pad (GST_ELEMENT_CAST (self), pad); gst_object_unref (pad); } g_list_free (self->srcpads); self->srcpads = NULL; gst_pad_set_caps (self->sink, NULL); gst_caps_replace (&self->sinkcaps, NULL); } static gboolean gst_deinterleave_set_process_function (GstDeinterleave * self, GstCaps * caps) { GstStructure *s; s = gst_caps_get_structure (caps, 0); if (!gst_structure_get_int (s, "width", &self->width)) return FALSE; switch (self->width) { case 8: self->func = (GstDeinterleaveFunc) deinterleave_8; break; case 16: self->func = (GstDeinterleaveFunc) deinterleave_16; break; case 24: self->func = (GstDeinterleaveFunc) deinterleave_24; break; case 32: self->func = (GstDeinterleaveFunc) deinterleave_32; break; case 64: self->func = (GstDeinterleaveFunc) deinterleave_64; break; default: return FALSE; } return TRUE; } static gboolean gst_deinterleave_sink_setcaps (GstPad * pad, GstCaps * caps) { GstDeinterleave *self; GstCaps *srccaps; GstStructure *s; self = GST_DEINTERLEAVE (gst_pad_get_parent (pad)); GST_DEBUG_OBJECT (self, "got caps: %" GST_PTR_FORMAT, caps); if (self->sinkcaps && !gst_caps_is_equal (caps, self->sinkcaps)) { gint new_channels, i; GstAudioChannelPosition *pos; gboolean same_layout = TRUE; s = gst_caps_get_structure (caps, 0); /* We allow caps changes as long as the number of channels doesn't change * and the channel positions stay the same. _getcaps() should've cared * for this already but better be safe. */ if (!gst_structure_get_int (s, "channels", &new_channels) || new_channels != self->channels || !gst_deinterleave_set_process_function (self, caps)) goto cannot_change_caps; /* Now check the channel positions. If we had no channel positions * and get them or the other way around things have changed. * If we had channel positions and get different ones things have * changed too of course */ pos = gst_audio_get_channel_positions (s); if ((pos && !self->pos) || (!pos && self->pos)) goto cannot_change_caps; if (pos) { for (i = 0; i < self->channels; i++) { if (self->pos[i] != pos[i]) { same_layout = FALSE; break; } } g_free (pos); if (!same_layout) goto cannot_change_caps; } } else { s = gst_caps_get_structure (caps, 0); if (!gst_structure_get_int (s, "channels", &self->channels)) goto no_channels; if (!gst_deinterleave_set_process_function (self, caps)) goto unsupported_caps; self->pos = gst_audio_get_channel_positions (s); } gst_caps_replace (&self->sinkcaps, caps); /* Get srcpad caps */ srccaps = gst_caps_copy (caps); s = gst_caps_get_structure (srccaps, 0); gst_structure_set (s, "channels", G_TYPE_INT, 1, NULL); gst_structure_remove_field (s, "channel-positions"); /* If we already have pads, update the caps otherwise * add new pads */ if (self->srcpads) { gst_deinterleave_set_pads_caps (self, srccaps); } else { gst_deinterleave_add_new_pads (self, srccaps); } gst_caps_unref (srccaps); gst_object_unref (self); return TRUE; cannot_change_caps: { GST_ERROR_OBJECT (self, "can't set new caps: %" GST_PTR_FORMAT, caps); gst_object_unref (self); return FALSE; } unsupported_caps: { GST_ERROR_OBJECT (self, "caps not supported: %" GST_PTR_FORMAT, caps); gst_object_unref (self); return FALSE; } no_channels: { GST_ERROR_OBJECT (self, "invalid caps"); gst_object_unref (self); return FALSE; } } static void __remove_channels (GstCaps * caps) { GstStructure *s; gint i, size; size = gst_caps_get_size (caps); for (i = 0; i < size; i++) { s = gst_caps_get_structure (caps, i); gst_structure_remove_field (s, "channel-positions"); gst_structure_remove_field (s, "channels"); } } static void __set_channels (GstCaps * caps, gint channels) { GstStructure *s; gint i, size; size = gst_caps_get_size (caps); for (i = 0; i < size; i++) { s = gst_caps_get_structure (caps, i); if (channels > 0) gst_structure_set (s, "channels", G_TYPE_INT, channels, NULL); else gst_structure_set (s, "channels", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL); } } static GstCaps * gst_deinterleave_sink_getcaps (GstPad * pad) { GstDeinterleave *self = GST_DEINTERLEAVE (gst_pad_get_parent (pad)); GstCaps *ret; GList *l; GST_OBJECT_LOCK (self); /* Intersect all of our pad template caps with the peer caps of the pad * to get all formats that are possible up- and downstream. * * For the pad for which the caps are requested we don't remove the channel * informations as they must be in the returned caps and incompatibilities * will be detected here already */ ret = gst_caps_new_any (); for (l = GST_ELEMENT (self)->pads; l != NULL; l = l->next) { GstPad *ourpad = GST_PAD (l->data); GstCaps *peercaps = NULL, *ourcaps; ourcaps = gst_caps_copy (gst_pad_get_pad_template_caps (ourpad)); if (pad == ourpad) { if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) __set_channels (ourcaps, self->channels); else __set_channels (ourcaps, 1); } else { __remove_channels (ourcaps); /* Only ask for peer caps for other pads than pad * as otherwise gst_pad_peer_get_caps() might call * back into this function and deadlock */ peercaps = gst_pad_peer_get_caps (ourpad); } /* If the peer exists and has caps add them to the intersection, * otherwise assume that the peer accepts everything */ if (peercaps) { GstCaps *intersection; GstCaps *oldret = ret; __remove_channels (peercaps); intersection = gst_caps_intersect (peercaps, ourcaps); ret = gst_caps_intersect (ret, intersection); gst_caps_unref (intersection); gst_caps_unref (peercaps); gst_caps_unref (oldret); } else { GstCaps *oldret = ret; ret = gst_caps_intersect (ret, ourcaps); gst_caps_unref (oldret); } gst_caps_unref (ourcaps); } GST_OBJECT_UNLOCK (self); gst_object_unref (self); GST_DEBUG_OBJECT (pad, "Intersected caps to %" GST_PTR_FORMAT, ret); return ret; } static gboolean gst_deinterleave_sink_event (GstPad * pad, GstEvent * event) { GstDeinterleave *self = GST_DEINTERLEAVE (gst_pad_get_parent (pad)); gboolean ret; GST_DEBUG ("Got %s event on pad %s:%s", GST_EVENT_TYPE_NAME (event), GST_DEBUG_PAD_NAME (pad)); /* Send FLUSH_STOP, FLUSH_START and EOS immediately, no matter if * we have src pads already or not. Queue all other events and * push them after we have src pads */ switch (GST_EVENT_TYPE (event)) { case GST_EVENT_FLUSH_STOP: case GST_EVENT_FLUSH_START: case GST_EVENT_EOS: ret = gst_pad_event_default (pad, event); break; default: if (self->srcpads) { ret = gst_pad_event_default (pad, event); } else { GST_OBJECT_LOCK (self); self->pending_events = g_list_append (self->pending_events, event); GST_OBJECT_UNLOCK (self); ret = TRUE; } break; } gst_object_unref (self); return ret; } static gboolean gst_deinterleave_src_query (GstPad * pad, GstQuery * query) { GstDeinterleave *self = GST_DEINTERLEAVE (gst_pad_get_parent (pad)); gboolean res; res = gst_pad_query_default (pad, query); if (res && GST_QUERY_TYPE (query) == GST_QUERY_DURATION) { GstFormat format; gint64 dur; gst_query_parse_duration (query, &format, &dur); /* Need to divide by the number of channels in byte format * to get the correct value. All other formats should be fine */ if (format == GST_FORMAT_BYTES && dur != -1) gst_query_set_duration (query, format, dur / self->channels); } else if (res && GST_QUERY_TYPE (query) == GST_QUERY_POSITION) { GstFormat format; gint64 pos; gst_query_parse_position (query, &format, &pos); /* Need to divide by the number of channels in byte format * to get the correct value. All other formats should be fine */ if (format == GST_FORMAT_BYTES && pos != -1) gst_query_set_position (query, format, pos / self->channels); } gst_object_unref (self); return res; } static void gst_deinterleave_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstDeinterleave *self = GST_DEINTERLEAVE (object); switch (prop_id) { case PROP_KEEP_POSITIONS: self->keep_positions = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_deinterleave_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstDeinterleave *self = GST_DEINTERLEAVE (object); switch (prop_id) { case PROP_KEEP_POSITIONS: g_value_set_boolean (value, self->keep_positions); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GstFlowReturn gst_deinterleave_process (GstDeinterleave * self, GstBuffer * buf) { GstFlowReturn ret = GST_FLOW_OK; guint channels = self->channels; guint pads_pushed = 0, buffers_allocated = 0; guint nframes = GST_BUFFER_SIZE (buf) / channels / (self->width / 8); guint bufsize = nframes * (self->width / 8); guint i; GList *srcs; GstBuffer **buffers_out = g_new0 (GstBuffer *, channels); guint8 *in, *out; /* Send any pending events to all src pads */ GST_OBJECT_LOCK (self); if (self->pending_events) { GList *events; GstEvent *event; GST_DEBUG_OBJECT (self, "Sending pending events to all src pads"); for (events = self->pending_events; events != NULL; events = events->next) { event = GST_EVENT (events->data); for (srcs = self->srcpads; srcs != NULL; srcs = srcs->next) gst_pad_push_event (GST_PAD (srcs->data), gst_event_ref (event)); gst_event_unref (event); } g_list_free (self->pending_events); self->pending_events = NULL; } GST_OBJECT_UNLOCK (self); /* Allocate buffers */ for (srcs = self->srcpads, i = 0; srcs; srcs = srcs->next, i++) { GstPad *pad = (GstPad *) srcs->data; buffers_out[i] = NULL; ret = gst_pad_alloc_buffer (pad, GST_BUFFER_OFFSET_NONE, bufsize, GST_PAD_CAPS (pad), &buffers_out[i]); /* Make sure we got a correct buffer. The only other case we allow * here is an unliked pad */ if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) goto alloc_buffer_failed; else if (buffers_out[i] && GST_BUFFER_SIZE (buffers_out[i]) != bufsize) goto alloc_buffer_bad_size; else if (buffers_out[i] && !gst_caps_is_equal (GST_BUFFER_CAPS (buffers_out[i]), GST_PAD_CAPS (pad))) goto invalid_caps; if (buffers_out[i]) { gst_buffer_copy_metadata (buffers_out[i], buf, GST_BUFFER_COPY_TIMESTAMPS | GST_BUFFER_COPY_FLAGS); buffers_allocated++; } } /* Return NOT_LINKED if no pad was linked */ if (!buffers_allocated) { GST_WARNING_OBJECT (self, "Couldn't allocate any buffers because no pad was linked"); ret = GST_FLOW_NOT_LINKED; goto done; } /* deinterleave */ for (srcs = self->srcpads, i = 0; srcs; srcs = srcs->next, i++) { GstPad *pad = (GstPad *) srcs->data; in = (guint8 *) GST_BUFFER_DATA (buf); in += i * (self->width / 8); if (buffers_out[i]) { out = (guint8 *) GST_BUFFER_DATA (buffers_out[i]); self->func (out, in, channels, nframes); ret = gst_pad_push (pad, buffers_out[i]); buffers_out[i] = NULL; if (ret == GST_FLOW_OK) pads_pushed++; else if (ret == GST_FLOW_NOT_LINKED) ret = GST_FLOW_OK; else goto push_failed; } } /* Return NOT_LINKED if no pad was linked */ if (!pads_pushed) ret = GST_FLOW_NOT_LINKED; done: gst_buffer_unref (buf); g_free (buffers_out); return ret; alloc_buffer_failed: { GST_WARNING ("gst_pad_alloc_buffer() returned %s", gst_flow_get_name (ret)); goto clean_buffers; } alloc_buffer_bad_size: { GST_WARNING ("called alloc_buffer(), but didn't get requested bytes"); ret = GST_FLOW_NOT_NEGOTIATED; goto clean_buffers; } invalid_caps: { GST_WARNING ("called alloc_buffer(), but didn't get requested caps"); ret = GST_FLOW_NOT_NEGOTIATED; goto clean_buffers; } push_failed: { GST_DEBUG ("push() failed, flow = %s", gst_flow_get_name (ret)); goto clean_buffers; } clean_buffers: { for (i = 0; i < channels; i++) { if (buffers_out[i]) gst_buffer_unref (buffers_out[i]); } gst_buffer_unref (buf); g_free (buffers_out); return ret; } } static GstFlowReturn gst_deinterleave_chain (GstPad * pad, GstBuffer * buffer) { GstDeinterleave *self = GST_DEINTERLEAVE (GST_PAD_PARENT (pad)); GstFlowReturn ret; g_return_val_if_fail (self->func != NULL, GST_FLOW_NOT_NEGOTIATED); g_return_val_if_fail (self->width > 0, GST_FLOW_NOT_NEGOTIATED); g_return_val_if_fail (self->channels > 0, GST_FLOW_NOT_NEGOTIATED); ret = gst_deinterleave_process (self, buffer); if (ret != GST_FLOW_OK) GST_DEBUG_OBJECT (self, "flow return: %s", gst_flow_get_name (ret)); return ret; } static gboolean gst_deinterleave_sink_activate_push (GstPad * pad, gboolean active) { GstDeinterleave *self = GST_DEINTERLEAVE (gst_pad_get_parent (pad)); /* Reset everything when the pad is deactivated */ if (!active) { gst_deinterleave_remove_pads (self); if (self->pos) { g_free (self->pos); self->pos = NULL; } self->channels = 0; self->width = 0; self->func = NULL; if (self->pending_events) { g_list_foreach (self->pending_events, (GFunc) gst_mini_object_unref, NULL); g_list_free (self->pending_events); self->pending_events = NULL; } } gst_object_unref (self); return TRUE; }