--- a/gst_plugins_good/gst/law/mulaw-decode.c Fri Jul 09 16:26:45 2010 -0500
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,309 +0,0 @@
-/* GStreamer
- * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
- *
- * 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-mulawdec
- *
- * This element decodes mulaw audio. Mulaw coding is also known as G.711.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-#include <gst/gst.h>
-#include "mulaw-decode.h"
-#include "mulaw-conversion.h"
-
-extern GstStaticPadTemplate mulaw_dec_src_factory;
-extern GstStaticPadTemplate mulaw_dec_sink_factory;
-
-/* Stereo signals and args */
-enum
-{
- /* FILL ME */
- LAST_SIGNAL
-};
-
-enum
-{
- ARG_0
-};
-
-static void gst_mulawdec_class_init (GstMuLawDecClass * klass);
-static void gst_mulawdec_base_init (GstMuLawDecClass * klass);
-static void gst_mulawdec_init (GstMuLawDec * mulawdec);
-static GstStateChangeReturn
-gst_mulawdec_change_state (GstElement * element, GstStateChange transition);
-
-static GstFlowReturn gst_mulawdec_chain (GstPad * pad, GstBuffer * buffer);
-
-static GstElementClass *parent_class = NULL;
-
-static gboolean
-mulawdec_sink_setcaps (GstPad * pad, GstCaps * caps)
-{
- GstMuLawDec *mulawdec;
- GstStructure *structure;
- int rate, channels;
- gboolean ret;
- GstCaps *outcaps;
-
- mulawdec = GST_MULAWDEC (GST_PAD_PARENT (pad));
-
- structure = gst_caps_get_structure (caps, 0);
- ret = gst_structure_get_int (structure, "rate", &rate);
- ret = ret && gst_structure_get_int (structure, "channels", &channels);
- if (!ret)
- return FALSE;
-
- outcaps = gst_caps_new_simple ("audio/x-raw-int",
- "width", G_TYPE_INT, 16,
- "depth", G_TYPE_INT, 16,
- "endianness", G_TYPE_INT, G_BYTE_ORDER,
- "signed", G_TYPE_BOOLEAN, TRUE,
- "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, channels, NULL);
- ret = gst_pad_set_caps (mulawdec->srcpad, outcaps);
- gst_caps_unref (outcaps);
-
- if (ret) {
- GST_DEBUG_OBJECT (mulawdec, "rate=%d, channels=%d", rate, channels);
- mulawdec->rate = rate;
- mulawdec->channels = channels;
- }
- return ret;
-}
-
-static GstCaps *
-mulawdec_getcaps (GstPad * pad)
-{
- GstMuLawDec *mulawdec;
- GstPad *otherpad;
- GstCaps *othercaps, *result;
- const GstCaps *templ;
- gchar *name;
- gint i;
-
- mulawdec = GST_MULAWDEC (GST_PAD_PARENT (pad));
-
- /* figure out the name of the caps we are going to return */
- if (pad == mulawdec->srcpad) {
- name = "audio/x-raw-int";
- otherpad = mulawdec->sinkpad;
- } else {
- name = "audio/x-mulaw";
- otherpad = mulawdec->srcpad;
- }
- /* get caps from the peer, this can return NULL when there is no peer */
- othercaps = gst_pad_peer_get_caps (otherpad);
-
- /* get the template caps to make sure we return something acceptable */
- templ = gst_pad_get_pad_template_caps (pad);
-
- if (othercaps) {
- /* there was a peer */
- othercaps = gst_caps_make_writable (othercaps);
-
- /* go through the caps and remove the fields we don't want */
- for (i = 0; i < gst_caps_get_size (othercaps); i++) {
- GstStructure *structure;
-
- structure = gst_caps_get_structure (othercaps, i);
-
- /* adjust the name */
- gst_structure_set_name (structure, name);
-
- if (pad == mulawdec->sinkpad) {
- /* remove the fields we don't want */
- gst_structure_remove_fields (structure, "width", "depth", "endianness",
- "signed", NULL);
- } else {
- /* add fixed fields */
- gst_structure_set (structure, "width", G_TYPE_INT, 16,
- "depth", G_TYPE_INT, 16,
- "endianness", G_TYPE_INT, G_BYTE_ORDER,
- "signed", G_TYPE_BOOLEAN, TRUE, NULL);
- }
- }
- /* filter against the allowed caps of the pad to return our result */
- result = gst_caps_intersect (othercaps, templ);
- gst_caps_unref (othercaps);
- } else {
- /* there was no peer, return the template caps */
- result = gst_caps_copy (templ);
- }
- return result;
-}
-
-GType
-gst_mulawdec_get_type (void)
-{
- static GType mulawdec_type = 0;
-
- if (!mulawdec_type) {
- static const GTypeInfo mulawdec_info = {
- sizeof (GstMuLawDecClass),
- (GBaseInitFunc) gst_mulawdec_base_init,
- NULL,
- (GClassInitFunc) gst_mulawdec_class_init,
- NULL,
- NULL,
- sizeof (GstMuLawDec),
- 0,
- (GInstanceInitFunc) gst_mulawdec_init,
- };
-
- mulawdec_type =
- g_type_register_static (GST_TYPE_ELEMENT, "GstMuLawDec", &mulawdec_info,
- 0);
- }
- return mulawdec_type;
-}
-
-static void
-gst_mulawdec_base_init (GstMuLawDecClass * klass)
-{
- GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
- const GstElementDetails mulawdec_details =
- GST_ELEMENT_DETAILS ("Mu Law audio decoder",
- "Codec/Decoder/Audio",
- "Convert 8bit mu law to 16bit PCM",
- "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
-
- gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&mulaw_dec_src_factory));
- gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&mulaw_dec_sink_factory));
- gst_element_class_set_details (element_class, &mulawdec_details);
-}
-
-static void
-gst_mulawdec_class_init (GstMuLawDecClass * klass)
-{
- GstElementClass *element_class = (GstElementClass *) klass;
-
- parent_class = g_type_class_peek_parent (klass);
-
- element_class->change_state = GST_DEBUG_FUNCPTR (gst_mulawdec_change_state);
-}
-
-static void
-gst_mulawdec_init (GstMuLawDec * mulawdec)
-{
- mulawdec->sinkpad =
- gst_pad_new_from_static_template (&mulaw_dec_sink_factory, "sink");
- gst_pad_set_setcaps_function (mulawdec->sinkpad, mulawdec_sink_setcaps);
- gst_pad_set_getcaps_function (mulawdec->sinkpad, mulawdec_getcaps);
- gst_pad_set_chain_function (mulawdec->sinkpad, gst_mulawdec_chain);
- gst_element_add_pad (GST_ELEMENT (mulawdec), mulawdec->sinkpad);
-
- mulawdec->srcpad =
- gst_pad_new_from_static_template (&mulaw_dec_src_factory, "src");
- gst_pad_use_fixed_caps (mulawdec->srcpad);
- gst_pad_set_getcaps_function (mulawdec->srcpad, mulawdec_getcaps);
- gst_element_add_pad (GST_ELEMENT (mulawdec), mulawdec->srcpad);
-}
-
-static GstFlowReturn
-gst_mulawdec_chain (GstPad * pad, GstBuffer * buffer)
-{
- GstMuLawDec *mulawdec;
- gint16 *linear_data;
- guint8 *mulaw_data;
- guint mulaw_size;
- GstBuffer *outbuf;
- GstFlowReturn ret;
-
- mulawdec = GST_MULAWDEC (GST_PAD_PARENT (pad));
-
- if (G_UNLIKELY (mulawdec->rate == 0))
- goto not_negotiated;
-
- mulaw_data = (guint8 *) GST_BUFFER_DATA (buffer);
- mulaw_size = GST_BUFFER_SIZE (buffer);
-
- ret =
- gst_pad_alloc_buffer_and_set_caps (mulawdec->srcpad,
- GST_BUFFER_OFFSET_NONE, mulaw_size * 2, GST_PAD_CAPS (mulawdec->srcpad),
- &outbuf);
- if (ret != GST_FLOW_OK)
- goto alloc_failed;
-
- linear_data = (gint16 *) GST_BUFFER_DATA (outbuf);
-
- /* copy discont flag */
- if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))
- GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
-
- GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buffer);
- if (GST_BUFFER_DURATION (outbuf) == GST_CLOCK_TIME_NONE)
- GST_BUFFER_DURATION (outbuf) = gst_util_uint64_scale_int (GST_SECOND,
- mulaw_size * 2, 2 * mulawdec->rate * mulawdec->channels);
- else
- GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buffer);
- gst_buffer_set_caps (outbuf, GST_PAD_CAPS (mulawdec->srcpad));
-
- mulaw_decode (mulaw_data, linear_data, mulaw_size);
-
- gst_buffer_unref (buffer);
-
- ret = gst_pad_push (mulawdec->srcpad, outbuf);
-
- return ret;
-
- /* ERRORS */
-not_negotiated:
- {
- GST_WARNING_OBJECT (mulawdec, "no input format set: not-negotiated");
- gst_buffer_unref (buffer);
- return GST_FLOW_NOT_NEGOTIATED;
- }
-alloc_failed:
- {
- GST_DEBUG_OBJECT (mulawdec, "pad alloc failed, flow: %s",
- gst_flow_get_name (ret));
- gst_buffer_unref (buffer);
- return ret;
- }
-}
-
-static GstStateChangeReturn
-gst_mulawdec_change_state (GstElement * element, GstStateChange transition)
-{
- GstStateChangeReturn ret;
- GstMuLawDec *dec = GST_MULAWDEC (element);
-
- switch (transition) {
- default:
- break;
- }
-
- ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
- if (ret != GST_STATE_CHANGE_SUCCESS)
- return ret;
-
- switch (transition) {
- case GST_STATE_CHANGE_PAUSED_TO_READY:
- dec->rate = 0;
- dec->channels = 0;
- break;
- default:
- break;
- }
-
- return ret;
-}