/* GStreamer * Copyright (C) 2004 Wim Taymans * Copyright (C) 2006 Tim-Philipp Müller * Copyright (C) 2008 Sebastian Dröge * * 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. */ /* * Based on the speexdec element. */ /** * SECTION:element-opusdec * @see_also: opusenc, oggdemux * * This element decodes a OPUS stream to raw integer audio. * * * Example pipelines * |[ * gst-launch -v filesrc location=opus.ogg ! oggdemux ! opusdec ! audioconvert ! audioresample ! alsasink * ]| Decode an Ogg/Opus file. To create an Ogg/Opus file refer to the documentation of opusenc. * */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include "gstopusdec.h" #include #include GST_DEBUG_CATEGORY_STATIC (opusdec_debug); #define GST_CAT_DEFAULT opusdec_debug #define DEC_MAX_FRAME_SIZE 2000 static GstStaticPadTemplate opus_dec_src_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-raw-int, " "rate = (int) [ 32000, 64000 ], " "channels = (int) [ 1, 2 ], " "endianness = (int) BYTE_ORDER, " "signed = (boolean) true, " "width = (int) 16, " "depth = (int) 16") ); static GstStaticPadTemplate opus_dec_sink_factory = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-opus") ); GST_BOILERPLATE (GstOpusDec, gst_opus_dec, GstElement, GST_TYPE_ELEMENT); static gboolean opus_dec_sink_event (GstPad * pad, GstEvent * event); static GstFlowReturn opus_dec_chain (GstPad * pad, GstBuffer * buf); static gboolean opus_dec_sink_setcaps (GstPad * pad, GstCaps * caps); static GstStateChangeReturn opus_dec_change_state (GstElement * element, GstStateChange transition); static gboolean opus_dec_src_event (GstPad * pad, GstEvent * event); static gboolean opus_dec_src_query (GstPad * pad, GstQuery * query); static gboolean opus_dec_sink_query (GstPad * pad, GstQuery * query); static const GstQueryType *opus_get_src_query_types (GstPad * pad); static const GstQueryType *opus_get_sink_query_types (GstPad * pad); static gboolean opus_dec_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value); static GstFlowReturn opus_dec_chain_parse_data (GstOpusDec * dec, GstBuffer * buf, GstClockTime timestamp, GstClockTime duration); static GstFlowReturn opus_dec_chain_parse_header (GstOpusDec * dec, GstBuffer * buf); #if 0 static GstFlowReturn opus_dec_chain_parse_comments (GstOpusDec * dec, GstBuffer * buf); #endif static void gst_opus_dec_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&opus_dec_src_factory)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&opus_dec_sink_factory)); gst_element_class_set_details_simple (element_class, "Opus audio decoder", "Codec/Decoder/Audio", "decode opus streams to audio", "Sebastian Dröge "); } static void gst_opus_dec_class_init (GstOpusDecClass * klass) { GstElementClass *gstelement_class; gstelement_class = (GstElementClass *) klass; gstelement_class->change_state = GST_DEBUG_FUNCPTR (opus_dec_change_state); GST_DEBUG_CATEGORY_INIT (opusdec_debug, "opusdec", 0, "opus decoding element"); } static void gst_opus_dec_reset (GstOpusDec * dec) { gst_segment_init (&dec->segment, GST_FORMAT_UNDEFINED); dec->granulepos = -1; dec->packetno = 0; dec->frame_size = 0; dec->frame_samples = 960; dec->frame_duration = 0; if (dec->state) { opus_decoder_destroy (dec->state); dec->state = NULL; } #if 0 if (dec->mode) { opus_mode_destroy (dec->mode); dec->mode = NULL; } #endif gst_buffer_replace (&dec->streamheader, NULL); gst_buffer_replace (&dec->vorbiscomment, NULL); g_list_foreach (dec->extra_headers, (GFunc) gst_mini_object_unref, NULL); g_list_free (dec->extra_headers); dec->extra_headers = NULL; #if 0 memset (&dec->header, 0, sizeof (dec->header)); #endif } static void gst_opus_dec_init (GstOpusDec * dec, GstOpusDecClass * g_class) { dec->sinkpad = gst_pad_new_from_static_template (&opus_dec_sink_factory, "sink"); gst_pad_set_chain_function (dec->sinkpad, GST_DEBUG_FUNCPTR (opus_dec_chain)); gst_pad_set_event_function (dec->sinkpad, GST_DEBUG_FUNCPTR (opus_dec_sink_event)); gst_pad_set_query_type_function (dec->sinkpad, GST_DEBUG_FUNCPTR (opus_get_sink_query_types)); gst_pad_set_query_function (dec->sinkpad, GST_DEBUG_FUNCPTR (opus_dec_sink_query)); gst_pad_set_setcaps_function (dec->sinkpad, GST_DEBUG_FUNCPTR (opus_dec_sink_setcaps)); gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad); dec->srcpad = gst_pad_new_from_static_template (&opus_dec_src_factory, "src"); gst_pad_use_fixed_caps (dec->srcpad); gst_pad_set_event_function (dec->srcpad, GST_DEBUG_FUNCPTR (opus_dec_src_event)); gst_pad_set_query_type_function (dec->srcpad, GST_DEBUG_FUNCPTR (opus_get_src_query_types)); gst_pad_set_query_function (dec->srcpad, GST_DEBUG_FUNCPTR (opus_dec_src_query)); gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad); dec->sample_rate = 48000; dec->n_channels = 2; gst_opus_dec_reset (dec); } static gboolean opus_dec_sink_setcaps (GstPad * pad, GstCaps * caps) { GstOpusDec *dec = GST_OPUS_DEC (gst_pad_get_parent (pad)); gboolean ret = TRUE; GstStructure *s; const GValue *streamheader; s = gst_caps_get_structure (caps, 0); if ((streamheader = gst_structure_get_value (s, "streamheader")) && G_VALUE_HOLDS (streamheader, GST_TYPE_ARRAY) && gst_value_array_get_size (streamheader) >= 2) { const GValue *header; GstBuffer *buf; GstFlowReturn res = GST_FLOW_OK; header = gst_value_array_get_value (streamheader, 0); if (header && G_VALUE_HOLDS (header, GST_TYPE_BUFFER)) { buf = gst_value_get_buffer (header); res = opus_dec_chain_parse_header (dec, buf); if (res != GST_FLOW_OK) goto done; gst_buffer_replace (&dec->streamheader, buf); } #if 0 vorbiscomment = gst_value_array_get_value (streamheader, 1); if (vorbiscomment && G_VALUE_HOLDS (vorbiscomment, GST_TYPE_BUFFER)) { buf = gst_value_get_buffer (vorbiscomment); res = opus_dec_chain_parse_comments (dec, buf); if (res != GST_FLOW_OK) goto done; gst_buffer_replace (&dec->vorbiscomment, buf); } #endif g_list_foreach (dec->extra_headers, (GFunc) gst_mini_object_unref, NULL); g_list_free (dec->extra_headers); dec->extra_headers = NULL; if (gst_value_array_get_size (streamheader) > 2) { gint i, n; n = gst_value_array_get_size (streamheader); for (i = 2; i < n; i++) { header = gst_value_array_get_value (streamheader, i); buf = gst_value_get_buffer (header); dec->extra_headers = g_list_prepend (dec->extra_headers, gst_buffer_ref (buf)); } } } done: gst_object_unref (dec); return ret; } static gboolean opus_dec_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value) { gboolean res = TRUE; GstOpusDec *dec; guint64 scale = 1; dec = GST_OPUS_DEC (gst_pad_get_parent (pad)); if (dec->packetno < 1) { res = FALSE; goto cleanup; } if (src_format == *dest_format) { *dest_value = src_value; res = TRUE; goto cleanup; } if (pad == dec->sinkpad && (src_format == GST_FORMAT_BYTES || *dest_format == GST_FORMAT_BYTES)) { res = FALSE; goto cleanup; } switch (src_format) { case GST_FORMAT_TIME: switch (*dest_format) { case GST_FORMAT_BYTES: scale = sizeof (gint16) * dec->n_channels; case GST_FORMAT_DEFAULT: *dest_value = gst_util_uint64_scale_int (scale * src_value, dec->sample_rate, GST_SECOND); break; default: res = FALSE; break; } break; case GST_FORMAT_DEFAULT: switch (*dest_format) { case GST_FORMAT_BYTES: *dest_value = src_value * sizeof (gint16) * dec->n_channels; break; case GST_FORMAT_TIME: *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND, dec->sample_rate); break; default: res = FALSE; break; } break; case GST_FORMAT_BYTES: switch (*dest_format) { case GST_FORMAT_DEFAULT: *dest_value = src_value / (sizeof (gint16) * dec->n_channels); break; case GST_FORMAT_TIME: *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND, dec->sample_rate * sizeof (gint16) * dec->n_channels); break; default: res = FALSE; break; } break; default: res = FALSE; break; } cleanup: gst_object_unref (dec); return res; } static const GstQueryType * opus_get_sink_query_types (GstPad * pad) { static const GstQueryType opus_dec_sink_query_types[] = { GST_QUERY_CONVERT, 0 }; return opus_dec_sink_query_types; } static gboolean opus_dec_sink_query (GstPad * pad, GstQuery * query) { GstOpusDec *dec; gboolean res; dec = GST_OPUS_DEC (gst_pad_get_parent (pad)); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_CONVERT: { GstFormat src_fmt, dest_fmt; gint64 src_val, dest_val; gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val); res = opus_dec_convert (pad, src_fmt, src_val, &dest_fmt, &dest_val); if (res) { gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val); } break; } default: res = gst_pad_query_default (pad, query); break; } gst_object_unref (dec); return res; } static const GstQueryType * opus_get_src_query_types (GstPad * pad) { static const GstQueryType opus_dec_src_query_types[] = { GST_QUERY_POSITION, GST_QUERY_DURATION, 0 }; return opus_dec_src_query_types; } static gboolean opus_dec_src_query (GstPad * pad, GstQuery * query) { GstOpusDec *dec; gboolean res = FALSE; dec = GST_OPUS_DEC (gst_pad_get_parent (pad)); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_POSITION:{ GstSegment segment; GstFormat format; gint64 cur; gst_query_parse_position (query, &format, NULL); GST_PAD_STREAM_LOCK (dec->sinkpad); segment = dec->segment; GST_PAD_STREAM_UNLOCK (dec->sinkpad); if (segment.format != GST_FORMAT_TIME) { GST_DEBUG_OBJECT (dec, "segment not initialised yet"); break; } if ((res = opus_dec_convert (dec->srcpad, GST_FORMAT_TIME, segment.last_stop, &format, &cur))) { gst_query_set_position (query, format, cur); } break; } case GST_QUERY_DURATION:{ GstFormat format = GST_FORMAT_TIME; gint64 dur; /* get duration from demuxer */ if (!gst_pad_query_peer_duration (dec->sinkpad, &format, &dur)) break; gst_query_parse_duration (query, &format, NULL); /* and convert it into the requested format */ if ((res = opus_dec_convert (dec->srcpad, GST_FORMAT_TIME, dur, &format, &dur))) { gst_query_set_duration (query, format, dur); } break; } default: res = gst_pad_query_default (pad, query); break; } gst_object_unref (dec); return res; } static gboolean opus_dec_src_event (GstPad * pad, GstEvent * event) { gboolean res = FALSE; GstOpusDec *dec = GST_OPUS_DEC (gst_pad_get_parent (pad)); GST_LOG_OBJECT (dec, "handling %s event", GST_EVENT_TYPE_NAME (event)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEEK:{ GstFormat format, tformat; gdouble rate; GstEvent *real_seek; GstSeekFlags flags; GstSeekType cur_type, stop_type; gint64 cur, stop; gint64 tcur, tstop; gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur, &stop_type, &stop); /* we have to ask our peer to seek to time here as we know * nothing about how to generate a granulepos from the src * formats or anything. * * First bring the requested format to time */ tformat = GST_FORMAT_TIME; if (!(res = opus_dec_convert (pad, format, cur, &tformat, &tcur))) break; if (!(res = opus_dec_convert (pad, format, stop, &tformat, &tstop))) break; /* then seek with time on the peer */ real_seek = gst_event_new_seek (rate, GST_FORMAT_TIME, flags, cur_type, tcur, stop_type, tstop); GST_LOG_OBJECT (dec, "seek to %" GST_TIME_FORMAT, GST_TIME_ARGS (tcur)); res = gst_pad_push_event (dec->sinkpad, real_seek); gst_event_unref (event); break; } default: res = gst_pad_event_default (pad, event); break; } gst_object_unref (dec); return res; } static gboolean opus_dec_sink_event (GstPad * pad, GstEvent * event) { GstOpusDec *dec; gboolean ret = FALSE; dec = GST_OPUS_DEC (gst_pad_get_parent (pad)); GST_LOG_OBJECT (dec, "handling %s event", GST_EVENT_TYPE_NAME (event)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_NEWSEGMENT:{ GstFormat format; gdouble rate, arate; gint64 start, stop, time; gboolean update; gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format, &start, &stop, &time); if (format != GST_FORMAT_TIME) goto newseg_wrong_format; if (rate <= 0.0) goto newseg_wrong_rate; if (update) { /* time progressed without data, see if we can fill the gap with * some concealment data */ if (dec->segment.last_stop < start) { GstClockTime duration; duration = start - dec->segment.last_stop; opus_dec_chain_parse_data (dec, NULL, dec->segment.last_stop, duration); } } /* now configure the values */ gst_segment_set_newsegment_full (&dec->segment, update, rate, arate, GST_FORMAT_TIME, start, stop, time); dec->granulepos = -1; GST_DEBUG_OBJECT (dec, "segment now: cur = %" GST_TIME_FORMAT " [%" GST_TIME_FORMAT " - %" GST_TIME_FORMAT "]", GST_TIME_ARGS (dec->segment.last_stop), GST_TIME_ARGS (dec->segment.start), GST_TIME_ARGS (dec->segment.stop)); ret = gst_pad_push_event (dec->srcpad, event); break; } default: ret = gst_pad_event_default (pad, event); break; } gst_object_unref (dec); return ret; /* ERRORS */ newseg_wrong_format: { GST_DEBUG_OBJECT (dec, "received non TIME newsegment"); gst_object_unref (dec); return FALSE; } newseg_wrong_rate: { GST_DEBUG_OBJECT (dec, "negative rates not supported yet"); gst_object_unref (dec); return FALSE; } } static GstFlowReturn opus_dec_chain_parse_header (GstOpusDec * dec, GstBuffer * buf) { GstCaps *caps; //gint error = OPUS_OK; #if 0 dec->samples_per_frame = opus_packet_get_samples_per_frame ( (const unsigned char *) GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf)); #endif #if 0 if (memcmp (dec->header.codec_id, "OPUS ", 8) != 0) goto invalid_header; #endif #if 0 #ifdef HAVE_OPUS_0_7 dec->mode = opus_mode_create (dec->sample_rate, dec->header.frame_size, &error); #else dec->mode = opus_mode_create (dec->sample_rate, dec->header.nb_channels, dec->header.frame_size, &error); #endif if (!dec->mode) goto mode_init_failed; /* initialize the decoder */ #ifdef HAVE_OPUS_0_11 dec->state = opus_decoder_create_custom (dec->mode, dec->header.nb_channels, &error); #else #ifdef HAVE_OPUS_0_7 dec->state = opus_decoder_create (dec->mode, dec->header.nb_channels, &error); #else dec->state = opus_decoder_create (dec->mode); #endif #endif #endif dec->state = opus_decoder_create (dec->sample_rate, dec->n_channels); if (!dec->state) goto init_failed; #if 0 #ifdef HAVE_OPUS_0_8 dec->frame_size = dec->header.frame_size; #else opus_mode_info (dec->mode, OPUS_GET_FRAME_SIZE, &dec->frame_size); #endif #endif dec->frame_duration = gst_util_uint64_scale_int (dec->frame_size, GST_SECOND, dec->sample_rate); /* set caps */ caps = gst_caps_new_simple ("audio/x-raw-int", "rate", G_TYPE_INT, dec->sample_rate, "channels", G_TYPE_INT, dec->n_channels, "signed", G_TYPE_BOOLEAN, TRUE, "endianness", G_TYPE_INT, G_BYTE_ORDER, "width", G_TYPE_INT, 16, "depth", G_TYPE_INT, 16, NULL); GST_DEBUG_OBJECT (dec, "rate=%d channels=%d frame-size=%d", dec->sample_rate, dec->n_channels, dec->frame_size); if (!gst_pad_set_caps (dec->srcpad, caps)) goto nego_failed; gst_caps_unref (caps); return GST_FLOW_OK; /* ERRORS */ #if 0 invalid_header: { GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE, (NULL), ("Invalid header")); return GST_FLOW_ERROR; } mode_init_failed: { GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE, (NULL), ("Mode initialization failed: %d", error)); return GST_FLOW_ERROR; } #endif init_failed: { GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE, (NULL), ("couldn't initialize decoder")); return GST_FLOW_ERROR; } nego_failed: { GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE, (NULL), ("couldn't negotiate format")); gst_caps_unref (caps); return GST_FLOW_NOT_NEGOTIATED; } } #if 0 static GstFlowReturn opus_dec_chain_parse_comments (GstOpusDec * dec, GstBuffer * buf) { GstTagList *list; gchar *encoder = NULL; list = gst_tag_list_from_vorbiscomment_buffer (buf, NULL, 0, &encoder); if (!list) { GST_WARNING_OBJECT (dec, "couldn't decode comments"); list = gst_tag_list_new (); } if (encoder) { gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_ENCODER, encoder, NULL); } gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_AUDIO_CODEC, "Opus", NULL); if (dec->header.bytes_per_packet > 0) { gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE, (guint) dec->header.bytes_per_packet * 8, NULL); } GST_INFO_OBJECT (dec, "tags: %" GST_PTR_FORMAT, list); gst_element_found_tags_for_pad (GST_ELEMENT (dec), dec->srcpad, list); g_free (encoder); g_free (ver); return GST_FLOW_OK; } #endif static GstFlowReturn opus_dec_chain_parse_data (GstOpusDec * dec, GstBuffer * buf, GstClockTime timestamp, GstClockTime duration) { GstFlowReturn res = GST_FLOW_OK; gint size; guint8 *data; GstBuffer *outbuf; gint16 *out_data; int n; if (timestamp != -1) { dec->segment.last_stop = timestamp; dec->granulepos = -1; } if (dec->state == NULL) { GstCaps *caps; dec->state = opus_decoder_create (dec->sample_rate, dec->n_channels); /* set caps */ caps = gst_caps_new_simple ("audio/x-raw-int", "rate", G_TYPE_INT, dec->sample_rate, "channels", G_TYPE_INT, dec->n_channels, "signed", G_TYPE_BOOLEAN, TRUE, "endianness", G_TYPE_INT, G_BYTE_ORDER, "width", G_TYPE_INT, 16, "depth", G_TYPE_INT, 16, NULL); GST_DEBUG_OBJECT (dec, "rate=%d channels=%d frame-size=%d", dec->sample_rate, dec->n_channels, dec->frame_size); if (!gst_pad_set_caps (dec->srcpad, caps)) GST_ERROR ("nego failure"); gst_caps_unref (caps); } if (buf) { data = GST_BUFFER_DATA (buf); size = GST_BUFFER_SIZE (buf); GST_DEBUG_OBJECT (dec, "received buffer of size %u", size); /* copy timestamp */ } else { /* concealment data, pass NULL as the bits parameters */ GST_DEBUG_OBJECT (dec, "creating concealment data"); data = NULL; size = 0; } GST_DEBUG ("bandwidth %d", opus_packet_get_bandwidth (data)); GST_DEBUG ("samples_per_frame %d", opus_packet_get_samples_per_frame (data, 48000)); GST_DEBUG ("channels %d", opus_packet_get_nb_channels (data)); res = gst_pad_alloc_buffer_and_set_caps (dec->srcpad, GST_BUFFER_OFFSET_NONE, dec->frame_samples * dec->n_channels * 2, GST_PAD_CAPS (dec->srcpad), &outbuf); if (res != GST_FLOW_OK) { GST_DEBUG_OBJECT (dec, "buf alloc flow: %s", gst_flow_get_name (res)); return res; } out_data = (gint16 *) GST_BUFFER_DATA (outbuf); GST_LOG_OBJECT (dec, "decoding frame"); n = opus_decode (dec->state, data, size, out_data, dec->frame_samples, TRUE); if (n < 0) { GST_ELEMENT_ERROR (dec, STREAM, DECODE, ("Decoding error: %d", n), (NULL)); return GST_FLOW_ERROR; } if (!GST_CLOCK_TIME_IS_VALID (timestamp)) { timestamp = gst_util_uint64_scale_int (dec->granulepos - dec->frame_size, GST_SECOND, dec->sample_rate); } GST_DEBUG_OBJECT (dec, "timestamp=%" GST_TIME_FORMAT, GST_TIME_ARGS (timestamp)); GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf); GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buf); if (dec->discont) { GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT); dec->discont = 0; } dec->segment.last_stop += dec->frame_duration; GST_LOG_OBJECT (dec, "pushing buffer with ts=%" GST_TIME_FORMAT ", dur=%" GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)), GST_TIME_ARGS (dec->frame_duration)); res = gst_pad_push (dec->srcpad, outbuf); if (res != GST_FLOW_OK) GST_DEBUG_OBJECT (dec, "flow: %s", gst_flow_get_name (res)); return res; } static GstFlowReturn opus_dec_chain (GstPad * pad, GstBuffer * buf) { GstFlowReturn res; GstOpusDec *dec; dec = GST_OPUS_DEC (gst_pad_get_parent (pad)); if (GST_BUFFER_IS_DISCONT (buf)) { dec->discont = TRUE; } res = opus_dec_chain_parse_data (dec, buf, GST_BUFFER_TIMESTAMP (buf), GST_BUFFER_DURATION (buf)); //done: dec->packetno++; gst_buffer_unref (buf); gst_object_unref (dec); return res; } static GstStateChangeReturn opus_dec_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret; GstOpusDec *dec = GST_OPUS_DEC (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: case GST_STATE_CHANGE_READY_TO_PAUSED: case GST_STATE_CHANGE_PAUSED_TO_PLAYING: default: break; } ret = parent_class->change_state (element, transition); if (ret != GST_STATE_CHANGE_SUCCESS) return ret; switch (transition) { case GST_STATE_CHANGE_PLAYING_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_READY: gst_opus_dec_reset (dec); break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; }