/* GStreamer Adaptive Multi-Rate Narrow-Band (AMR-NB) plugin * Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net> * * 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:element-amrwbdec * @see_also: #GstAmrwbEnc, #GstAmrwbParse * * AMR wideband decoder based on the * <ulink url="http://www.penguin.cz/~utx/amr">reference codec implementation</ulink>. * * <refsect2> * <title>Example launch line</title> * |[ * gst-launch filesrc location=abc.amr ! amrwbparse ! amrwbdec ! audioresample ! audioconvert ! alsasink * ]| * </refsect2> */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gstamrwbdec.h" static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/AMR-WB, " "rate = (int) 16000, " "channels = (int) 1") ); static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-raw-int, " "width = (int) 16, " "depth = (int) 16, " "signed = (boolean) TRUE, " "endianness = (int) BYTE_ORDER, " "rate = (int) 16000, " "channels = (int) 1") ); GST_DEBUG_CATEGORY_STATIC (gst_amrwbdec_debug); #define GST_CAT_DEFAULT gst_amrwbdec_debug extern const UWord8 block_size[]; static gboolean gst_amrwbdec_event (GstPad * pad, GstEvent * event); static GstFlowReturn gst_amrwbdec_chain (GstPad * pad, GstBuffer * buffer); static gboolean gst_amrwbdec_setcaps (GstPad * pad, GstCaps * caps); static GstStateChangeReturn gst_amrwbdec_state_change (GstElement * element, GstStateChange transition); static void gst_amrwbdec_finalize (GObject * object); #define _do_init(bla) \ GST_DEBUG_CATEGORY_INIT (gst_amrwbdec_debug, "amrwbdec", 0, "AMR-WB audio decoder"); GST_BOILERPLATE_FULL (GstAmrwbDec, gst_amrwbdec, GstElement, GST_TYPE_ELEMENT, _do_init); static void gst_amrwbdec_base_init (gpointer klass) { GstElementClass *element_class = GST_ELEMENT_CLASS (klass); GstElementDetails details = GST_ELEMENT_DETAILS ("AMR-WB audio decoder", "Codec/Decoder/Audio", "Adaptive Multi-Rate Wideband audio decoder", "Renato Araujo <renato.filho@indt.org.br>"); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&sink_template)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&src_template)); gst_element_class_set_details (element_class, &details); } static void gst_amrwbdec_class_init (GstAmrwbDecClass * klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); object_class->finalize = gst_amrwbdec_finalize; element_class->change_state = GST_DEBUG_FUNCPTR (gst_amrwbdec_state_change); } static void gst_amrwbdec_init (GstAmrwbDec * amrwbdec, GstAmrwbDecClass * klass) { /* create the sink pad */ amrwbdec->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink"); gst_pad_set_setcaps_function (amrwbdec->sinkpad, gst_amrwbdec_setcaps); gst_pad_set_event_function (amrwbdec->sinkpad, gst_amrwbdec_event); gst_pad_set_chain_function (amrwbdec->sinkpad, gst_amrwbdec_chain); gst_element_add_pad (GST_ELEMENT (amrwbdec), amrwbdec->sinkpad); /* create the src pad */ amrwbdec->srcpad = gst_pad_new_from_static_template (&src_template, "src"); gst_pad_use_fixed_caps (amrwbdec->srcpad); gst_element_add_pad (GST_ELEMENT (amrwbdec), amrwbdec->srcpad); amrwbdec->adapter = gst_adapter_new (); /* init rest */ amrwbdec->handle = NULL; amrwbdec->channels = 0; amrwbdec->rate = 0; amrwbdec->duration = 0; amrwbdec->ts = -1; } static void gst_amrwbdec_finalize (GObject * object) { GstAmrwbDec *amrwbdec; amrwbdec = GST_AMRWBDEC (object); gst_adapter_clear (amrwbdec->adapter); g_object_unref (amrwbdec->adapter); G_OBJECT_CLASS (parent_class)->finalize (object); } static gboolean gst_amrwbdec_setcaps (GstPad * pad, GstCaps * caps) { GstStructure *structure; GstAmrwbDec *amrwbdec; GstCaps *copy; amrwbdec = GST_AMRWBDEC (gst_pad_get_parent (pad)); structure = gst_caps_get_structure (caps, 0); /* get channel count */ gst_structure_get_int (structure, "channels", &amrwbdec->channels); gst_structure_get_int (structure, "rate", &amrwbdec->rate); /* create reverse caps */ copy = gst_caps_new_simple ("audio/x-raw-int", "channels", G_TYPE_INT, amrwbdec->channels, "width", G_TYPE_INT, 16, "depth", G_TYPE_INT, 16, "endianness", G_TYPE_INT, G_BYTE_ORDER, "rate", G_TYPE_INT, amrwbdec->rate, "signed", G_TYPE_BOOLEAN, TRUE, NULL); amrwbdec->duration = gst_util_uint64_scale_int (GST_SECOND, L_FRAME16k, amrwbdec->rate * amrwbdec->channels); gst_pad_set_caps (amrwbdec->srcpad, copy); gst_caps_unref (copy); gst_object_unref (amrwbdec); return TRUE; } static gboolean gst_amrwbdec_event (GstPad * pad, GstEvent * event) { GstAmrwbDec *amrwbdec; gboolean ret = TRUE; amrwbdec = GST_AMRWBDEC (gst_pad_get_parent (pad)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_FLUSH_START: ret = gst_pad_push_event (amrwbdec->srcpad, event); break; case GST_EVENT_FLUSH_STOP: ret = gst_pad_push_event (amrwbdec->srcpad, event); gst_adapter_clear (amrwbdec->adapter); amrwbdec->ts = -1; break; case GST_EVENT_EOS: gst_adapter_clear (amrwbdec->adapter); ret = gst_pad_push_event (amrwbdec->srcpad, event); break; 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); /* we need time for now */ if (format != GST_FORMAT_TIME) goto newseg_wrong_format; GST_DEBUG_OBJECT (amrwbdec, "newsegment: update %d, rate %g, arate %g, start %" GST_TIME_FORMAT ", stop %" GST_TIME_FORMAT ", time %" GST_TIME_FORMAT, update, rate, arate, GST_TIME_ARGS (start), GST_TIME_ARGS (stop), GST_TIME_ARGS (time)); /* now configure the values */ gst_segment_set_newsegment_full (&amrwbdec->segment, update, rate, arate, format, start, stop, time); ret = gst_pad_push_event (amrwbdec->srcpad, event); } break; default: ret = gst_pad_push_event (amrwbdec->srcpad, event); break; } done: gst_object_unref (amrwbdec); return ret; /* ERRORS */ newseg_wrong_format: { GST_DEBUG_OBJECT (amrwbdec, "received non TIME newsegment"); goto done; } } static GstFlowReturn gst_amrwbdec_chain (GstPad * pad, GstBuffer * buffer) { GstAmrwbDec *amrwbdec; GstFlowReturn ret = GST_FLOW_OK; amrwbdec = GST_AMRWBDEC (gst_pad_get_parent (pad)); if (amrwbdec->rate == 0 || amrwbdec->channels == 0) goto not_negotiated; /* discontinuity, don't combine samples before and after the * DISCONT */ if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)) { gst_adapter_clear (amrwbdec->adapter); amrwbdec->ts = -1; amrwbdec->discont = TRUE; } /* take latest timestamp, FIXME timestamp is the one of the * first buffer in the adapter. */ if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) amrwbdec->ts = GST_BUFFER_TIMESTAMP (buffer); gst_adapter_push (amrwbdec->adapter, buffer); while (TRUE) { GstBuffer *out; const guint8 *data; gint block, mode; /* need to peek data to get the size */ if (gst_adapter_available (amrwbdec->adapter) < 1) break; data = gst_adapter_peek (amrwbdec->adapter, 1); /* get size */ mode = (data[0] >> 3) & 0x0F; block = block_size[mode]; GST_DEBUG_OBJECT (amrwbdec, "mode %d, block %d", mode, block); if (!block || gst_adapter_available (amrwbdec->adapter) < block) break; /* the library seems to write into the source data, hence the copy. */ data = gst_adapter_take (amrwbdec->adapter, block); /* get output */ out = gst_buffer_new_and_alloc (sizeof (gint16) * L_FRAME16k); GST_BUFFER_DURATION (out) = amrwbdec->duration; GST_BUFFER_TIMESTAMP (out) = amrwbdec->ts; if (amrwbdec->ts != -1) amrwbdec->ts += amrwbdec->duration; if (amrwbdec->discont) { GST_BUFFER_FLAG_SET (out, GST_BUFFER_FLAG_DISCONT); amrwbdec->discont = FALSE; } gst_buffer_set_caps (out, GST_PAD_CAPS (amrwbdec->srcpad)); /* decode */ D_IF_decode (amrwbdec->handle, (UWord8 *) data, (Word16 *) GST_BUFFER_DATA (out), _good_frame); g_free ((gpointer) data); /* send out */ ret = gst_pad_push (amrwbdec->srcpad, out); } gst_object_unref (amrwbdec); return ret; /* ERRORS */ not_negotiated: { GST_ELEMENT_ERROR (amrwbdec, STREAM, TYPE_NOT_FOUND, (NULL), ("Decoder is not initialized")); gst_object_unref (amrwbdec); return GST_FLOW_NOT_NEGOTIATED; } } static GstStateChangeReturn gst_amrwbdec_state_change (GstElement * element, GstStateChange transition) { GstAmrwbDec *amrwbdec; GstStateChangeReturn ret; amrwbdec = GST_AMRWBDEC (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: if (!(amrwbdec->handle = D_IF_init ())) goto init_failed; break; case GST_STATE_CHANGE_READY_TO_PAUSED: gst_adapter_clear (amrwbdec->adapter); amrwbdec->rate = 0; amrwbdec->channels = 0; amrwbdec->ts = -1; amrwbdec->discont = TRUE; gst_segment_init (&amrwbdec->segment, GST_FORMAT_TIME); break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_READY_TO_NULL: D_IF_exit (amrwbdec->handle); break; default: break; } return ret; /* ERRORS */ init_failed: { GST_ELEMENT_ERROR (amrwbdec, LIBRARY, INIT, (NULL), ("Failed to open AMR Decoder")); return GST_STATE_CHANGE_FAILURE; } }