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authorKibum Kim <kb0929.kim@samsung.com>2012-01-07 00:46:56 +0900
committerKibum Kim <kb0929.kim@samsung.com>2012-01-07 00:46:56 +0900
commit4fcf0a9192ac1dee34309a66be632530b66f6822 (patch)
treee09f9233b63b22f97084798dcf6ffd3c85cc3adb /gst/law
parentdfa84b358c7cdf0535eba1fead62fc4122cc56e6 (diff)
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Git init
Diffstat (limited to 'gst/law')
-rw-r--r--gst/law/Makefile.am40
-rw-r--r--gst/law/Makefile.in899
-rw-r--r--gst/law/alaw-decode.c344
-rw-r--r--gst/law/alaw-decode.h58
-rw-r--r--gst/law/alaw-encode.c524
-rw-r--r--gst/law/alaw-encode.h59
-rw-r--r--gst/law/alaw.c77
-rw-r--r--gst/law/mulaw-conversion.c118
-rw-r--r--gst/law/mulaw-conversion.h12
-rw-r--r--gst/law/mulaw-decode.c307
-rw-r--r--gst/law/mulaw-decode.h58
-rw-r--r--gst/law/mulaw-encode.c297
-rw-r--r--gst/law/mulaw-encode.h59
-rw-r--r--gst/law/mulaw.c75
14 files changed, 2927 insertions, 0 deletions
diff --git a/gst/law/Makefile.am b/gst/law/Makefile.am
new file mode 100644
index 0000000..16bff25
--- /dev/null
+++ b/gst/law/Makefile.am
@@ -0,0 +1,40 @@
+plugin_LTLIBRARIES = libgstalaw.la libgstmulaw.la
+
+libgstalaw_la_SOURCES = alaw-encode.c alaw-decode.c alaw.c
+libgstalaw_la_CFLAGS = $(GST_CFLAGS)
+libgstalaw_la_LIBADD = $(GST_LIBS)
+libgstalaw_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+libgstalaw_la_LIBTOOLFLAGS = --tag=disable-static
+
+libgstmulaw_la_SOURCES = mulaw-encode.c mulaw-conversion.c mulaw-decode.c mulaw.c
+libgstmulaw_la_CFLAGS = $(GST_CFLAGS)
+libgstmulaw_la_LIBADD = $(GST_LIBS)
+libgstmulaw_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+libgstmulaw_la_LIBTOOLFLAGS = --tag=disable-static
+
+noinst_HEADERS = mulaw-conversion.h alaw-encode.h alaw-decode.h mulaw-encode.h mulaw-decode.h
+
+Android.mk: Makefile.am $(BUILT_SOURCES)
+ androgenizer \
+ -:PROJECT libgstalaw -:SHARED libgstalaw \
+ -:TAGS eng debug \
+ -:REL_TOP $(top_srcdir) -:ABS_TOP $(abs_top_srcdir) \
+ -:SOURCES $(libgstalaw_la_SOURCES) \
+ $(nodist_libgstalaw_la_SOURCES) \
+ -:CFLAGS $(DEFS) $(DEFAULT_INCLUDES) $(libgstalaw_la_CFLAGS) \
+ -:LDFLAGS $(libgstalaw_la_LDFLAGS) \
+ $(libgstalaw_la_LIBADD) \
+ -ldl \
+ -:PASSTHROUGH LOCAL_ARM_MODE:=arm \
+ LOCAL_MODULE_PATH:='$$(TARGET_OUT)/lib/gstreamer-0.10' \
+ -:SHARED libgstmulaw \
+ -:TAGS eng debug \
+ -:REL_TOP $(top_srcdir) -:ABS_TOP $(abs_top_srcdir) \
+ -:SOURCES $(libgstmulaw_la_SOURCES) \
+ -:CFLAGS $(DEFS) $(DEFAULT_INCLUDES) $(libgstmulaw_la_CFLAGS) \
+ -:LDFLAGS $(libgstmulaw_la_LDFLAGS) \
+ $(libgstmulaw_la_LIBADD) \
+ -ldl \
+ -:PASSTHROUGH LOCAL_ARM_MODE:=arm \
+ LOCAL_MODULE_PATH:='$$(TARGET_OUT)/lib/gstreamer-0.10' \
+ > $@
diff --git a/gst/law/Makefile.in b/gst/law/Makefile.in
new file mode 100644
index 0000000..31585dd
--- /dev/null
+++ b/gst/law/Makefile.in
@@ -0,0 +1,899 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
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+
+
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+am_libgstalaw_la_OBJECTS = libgstalaw_la-alaw-encode.lo \
+ libgstalaw_la-alaw-decode.lo libgstalaw_la-alaw.lo
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+@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) $(DEPDIR)/libgstmulaw_la-mulaw.Tpo $(DEPDIR)/libgstmulaw_la-mulaw.Plo
+@am__fastdepCC_FALSE@ $(AM_V_CC) @AM_BACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@ source='mulaw.c' object='libgstmulaw_la-mulaw.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@ $(LIBTOOL) $(AM_V_lt) --tag=CC $(libgstmulaw_la_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(libgstmulaw_la_CFLAGS) $(CFLAGS) -c -o libgstmulaw_la-mulaw.lo `test -f 'mulaw.c' || echo '$(srcdir)/'`mulaw.c
+
+mostlyclean-libtool:
+ -rm -f *.lo
+
+clean-libtool:
+ -rm -rf .libs _libs
+
+ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
+ list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
+ unique=`for i in $$list; do \
+ if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+ done | \
+ $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+ END { if (nonempty) { for (i in files) print i; }; }'`; \
+ mkid -fID $$unique
+tags: TAGS
+
+TAGS: $(HEADERS) $(SOURCES) $(TAGS_DEPENDENCIES) \
+ $(TAGS_FILES) $(LISP)
+ set x; \
+ here=`pwd`; \
+ list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
+ unique=`for i in $$list; do \
+ if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+ done | \
+ $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+ END { if (nonempty) { for (i in files) print i; }; }'`; \
+ shift; \
+ if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+ test -n "$$unique" || unique=$$empty_fix; \
+ if test $$# -gt 0; then \
+ $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+ "$$@" $$unique; \
+ else \
+ $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+ $$unique; \
+ fi; \
+ fi
+ctags: CTAGS
+CTAGS: $(HEADERS) $(SOURCES) $(TAGS_DEPENDENCIES) \
+ $(TAGS_FILES) $(LISP)
+ list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
+ unique=`for i in $$list; do \
+ if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+ done | \
+ $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+ END { if (nonempty) { for (i in files) print i; }; }'`; \
+ test -z "$(CTAGS_ARGS)$$unique" \
+ || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+ $$unique
+
+GTAGS:
+ here=`$(am__cd) $(top_builddir) && pwd` \
+ && $(am__cd) $(top_srcdir) \
+ && gtags -i $(GTAGS_ARGS) "$$here"
+
+distclean-tags:
+ -rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
+ @srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+ topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+ list='$(DISTFILES)'; \
+ dist_files=`for file in $$list; do echo $$file; done | \
+ sed -e "s|^$$srcdirstrip/||;t" \
+ -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+ case $$dist_files in \
+ */*) $(MKDIR_P) `echo "$$dist_files" | \
+ sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+ sort -u` ;; \
+ esac; \
+ for file in $$dist_files; do \
+ if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+ if test -d $$d/$$file; then \
+ dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+ if test -d "$(distdir)/$$file"; then \
+ find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+ fi; \
+ if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+ cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+ find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+ fi; \
+ cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+ else \
+ test -f "$(distdir)/$$file" \
+ || cp -p $$d/$$file "$(distdir)/$$file" \
+ || exit 1; \
+ fi; \
+ done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LTLIBRARIES) $(HEADERS)
+installdirs:
+ for dir in "$(DESTDIR)$(plugindir)"; do \
+ test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+ done
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+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+ `test -z '$(STRIP)' || \
+ echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+ -test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+ -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+ @echo "This command is intended for maintainers to use"
+ @echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-pluginLTLIBRARIES \
+ mostlyclean-am
+
+distclean: distclean-am
+ -rm -rf ./$(DEPDIR)
+ -rm -f Makefile
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+ distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
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+html: html-am
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+html-am:
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+install-ps-am:
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+
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+ -rm -rf ./$(DEPDIR)
+ -rm -f Makefile
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+ mostlyclean-libtool
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+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \
+ clean-libtool clean-pluginLTLIBRARIES ctags distclean \
+ distclean-compile distclean-generic distclean-libtool \
+ distclean-tags distdir dvi dvi-am html html-am info info-am \
+ install install-am install-data install-data-am install-dvi \
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+
+
+Android.mk: Makefile.am $(BUILT_SOURCES)
+ androgenizer \
+ -:PROJECT libgstalaw -:SHARED libgstalaw \
+ -:TAGS eng debug \
+ -:REL_TOP $(top_srcdir) -:ABS_TOP $(abs_top_srcdir) \
+ -:SOURCES $(libgstalaw_la_SOURCES) \
+ $(nodist_libgstalaw_la_SOURCES) \
+ -:CFLAGS $(DEFS) $(DEFAULT_INCLUDES) $(libgstalaw_la_CFLAGS) \
+ -:LDFLAGS $(libgstalaw_la_LDFLAGS) \
+ $(libgstalaw_la_LIBADD) \
+ -ldl \
+ -:PASSTHROUGH LOCAL_ARM_MODE:=arm \
+ LOCAL_MODULE_PATH:='$$(TARGET_OUT)/lib/gstreamer-0.10' \
+ -:SHARED libgstmulaw \
+ -:TAGS eng debug \
+ -:REL_TOP $(top_srcdir) -:ABS_TOP $(abs_top_srcdir) \
+ -:SOURCES $(libgstmulaw_la_SOURCES) \
+ -:CFLAGS $(DEFS) $(DEFAULT_INCLUDES) $(libgstmulaw_la_CFLAGS) \
+ -:LDFLAGS $(libgstmulaw_la_LDFLAGS) \
+ $(libgstmulaw_la_LIBADD) \
+ -ldl \
+ -:PASSTHROUGH LOCAL_ARM_MODE:=arm \
+ LOCAL_MODULE_PATH:='$$(TARGET_OUT)/lib/gstreamer-0.10' \
+ > $@
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/gst/law/alaw-decode.c b/gst/law/alaw-decode.c
new file mode 100644
index 0000000..ee5367a
--- /dev/null
+++ b/gst/law/alaw-decode.c
@@ -0,0 +1,344 @@
+/* GStreamer A-Law to PCM conversion
+ * Copyright (C) 2000 by Abramo Bagnara <abramo@alsa-project.org>
+ *
+ * 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 2.1 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-alawdec
+ *
+ * This element decodes alaw audio. Alaw coding is also known as G.711.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "alaw-decode.h"
+
+extern GstStaticPadTemplate alaw_dec_src_factory;
+extern GstStaticPadTemplate alaw_dec_sink_factory;
+
+GST_DEBUG_CATEGORY_STATIC (alaw_dec_debug);
+#define GST_CAT_DEFAULT alaw_dec_debug
+
+static GstStateChangeReturn
+gst_alaw_dec_change_state (GstElement * element, GstStateChange transition);
+static GstFlowReturn gst_alaw_dec_chain (GstPad * pad, GstBuffer * buffer);
+
+GST_BOILERPLATE (GstALawDec, gst_alaw_dec, GstElement, GST_TYPE_ELEMENT);
+
+/* some day we might have defines in gstconfig.h that tell us about the
+ * desired cpu/memory/binary size trade-offs */
+#define GST_ALAW_DEC_USE_TABLE
+
+#ifdef GST_ALAW_DEC_USE_TABLE
+
+static const gint alaw_to_s16_table[256] = {
+ -5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736,
+ -7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784,
+ -2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368,
+ -3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392,
+ -22016, -20992, -24064, -23040, -17920, -16896, -19968, -18944,
+ -30208, -29184, -32256, -31232, -26112, -25088, -28160, -27136,
+ -11008, -10496, -12032, -11520, -8960, -8448, -9984, -9472,
+ -15104, -14592, -16128, -15616, -13056, -12544, -14080, -13568,
+ -344, -328, -376, -360, -280, -264, -312, -296,
+ -472, -456, -504, -488, -408, -392, -440, -424,
+ -88, -72, -120, -104, -24, -8, -56, -40,
+ -216, -200, -248, -232, -152, -136, -184, -168,
+ -1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184,
+ -1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696,
+ -688, -656, -752, -720, -560, -528, -624, -592,
+ -944, -912, -1008, -976, -816, -784, -880, -848,
+ 5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736,
+ 7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784,
+ 2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368,
+ 3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
+ 22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
+ 30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
+ 11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472,
+ 15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
+ 344, 328, 376, 360, 280, 264, 312, 296,
+ 472, 456, 504, 488, 408, 392, 440, 424,
+ 88, 72, 120, 104, 24, 8, 56, 40,
+ 216, 200, 248, 232, 152, 136, 184, 168,
+ 1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184,
+ 1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
+ 688, 656, 752, 720, 560, 528, 624, 592,
+ 944, 912, 1008, 976, 816, 784, 880, 848
+};
+
+static inline gint
+alaw_to_s16 (guint8 a_val)
+{
+ return alaw_to_s16_table[a_val];
+}
+
+#else /* GST_ALAW_DEC_USE_TABLE */
+
+static inline gint
+alaw_to_s16 (guint8 a_val)
+{
+ gint t;
+ gint seg;
+
+ a_val ^= 0x55;
+ t = a_val & 0x7f;
+ if (t < 16)
+ t = (t << 4) + 8;
+ else {
+ seg = (t >> 4) & 0x07;
+ t = ((t & 0x0f) << 4) + 0x108;
+ t <<= seg - 1;
+ }
+ return ((a_val & 0x80) ? t : -t);
+}
+
+#endif /* GST_ALAW_DEC_USE_TABLE */
+
+static gboolean
+gst_alaw_dec_sink_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstALawDec *alawdec;
+ GstStructure *structure;
+ int rate, channels;
+ gboolean ret;
+ GstCaps *outcaps;
+
+ alawdec = GST_ALAW_DEC (GST_PAD_PARENT (pad));
+
+ structure = gst_caps_get_structure (caps, 0);
+
+ ret = gst_structure_get_int (structure, "rate", &rate);
+ 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 (alawdec->srcpad, outcaps);
+ gst_caps_unref (outcaps);
+
+ if (ret) {
+ GST_DEBUG_OBJECT (alawdec, "rate=%d, channels=%d", rate, channels);
+ alawdec->rate = rate;
+ alawdec->channels = channels;
+ }
+ return ret;
+}
+
+static GstCaps *
+gst_alaw_dec_getcaps (GstPad * pad)
+{
+ GstALawDec *alawdec;
+ GstPad *otherpad;
+ GstCaps *othercaps, *result;
+ const GstCaps *templ;
+ const gchar *name;
+ gint i;
+
+ alawdec = GST_ALAW_DEC (GST_PAD_PARENT (pad));
+
+ /* figure out the name of the caps we are going to return */
+ if (pad == alawdec->srcpad) {
+ name = "audio/x-raw-int";
+ otherpad = alawdec->sinkpad;
+ } else {
+ name = "audio/x-alaw";
+ otherpad = alawdec->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 == alawdec->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;
+}
+
+static void
+gst_alaw_dec_base_init (gpointer klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&alaw_dec_src_factory));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&alaw_dec_sink_factory));
+
+ gst_element_class_set_details_simple (element_class, "A Law audio decoder",
+ "Codec/Decoder/Audio", "Convert 8bit A law to 16bit PCM",
+ "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
+
+ GST_DEBUG_CATEGORY_INIT (alaw_dec_debug, "alawdec", 0, "A Law audio decoder");
+}
+
+static void
+gst_alaw_dec_class_init (GstALawDecClass * klass)
+{
+ GstElementClass *element_class = (GstElementClass *) klass;
+
+ element_class->change_state = GST_DEBUG_FUNCPTR (gst_alaw_dec_change_state);
+}
+
+static void
+gst_alaw_dec_init (GstALawDec * alawdec, GstALawDecClass * klass)
+{
+ alawdec->sinkpad =
+ gst_pad_new_from_static_template (&alaw_dec_sink_factory, "sink");
+ gst_pad_set_setcaps_function (alawdec->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_alaw_dec_sink_setcaps));
+ gst_pad_set_getcaps_function (alawdec->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_alaw_dec_getcaps));
+ gst_pad_set_chain_function (alawdec->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_alaw_dec_chain));
+ gst_element_add_pad (GST_ELEMENT (alawdec), alawdec->sinkpad);
+
+ alawdec->srcpad =
+ gst_pad_new_from_static_template (&alaw_dec_src_factory, "src");
+ gst_pad_use_fixed_caps (alawdec->srcpad);
+ gst_pad_set_getcaps_function (alawdec->srcpad,
+ GST_DEBUG_FUNCPTR (gst_alaw_dec_getcaps));
+ gst_element_add_pad (GST_ELEMENT (alawdec), alawdec->srcpad);
+}
+
+static GstFlowReturn
+gst_alaw_dec_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstALawDec *alawdec;
+ gint16 *linear_data;
+ guint8 *alaw_data;
+ guint alaw_size;
+ GstBuffer *outbuf;
+ gint i;
+ GstFlowReturn ret;
+
+ alawdec = GST_ALAW_DEC (GST_PAD_PARENT (pad));
+
+ if (G_UNLIKELY (alawdec->rate == 0))
+ goto not_negotiated;
+
+ GST_LOG_OBJECT (alawdec, "buffer with ts=%" GST_TIME_FORMAT,
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
+
+ alaw_data = GST_BUFFER_DATA (buffer);
+ alaw_size = GST_BUFFER_SIZE (buffer);
+
+ ret =
+ gst_pad_alloc_buffer_and_set_caps (alawdec->srcpad,
+ GST_BUFFER_OFFSET_NONE, alaw_size * 2, GST_PAD_CAPS (alawdec->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);
+ GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buffer);
+ gst_buffer_set_caps (outbuf, GST_PAD_CAPS (alawdec->srcpad));
+
+ for (i = 0; i < alaw_size; i++) {
+ linear_data[i] = alaw_to_s16 (alaw_data[i]);
+ }
+ gst_buffer_unref (buffer);
+
+ ret = gst_pad_push (alawdec->srcpad, outbuf);
+
+ return ret;
+
+not_negotiated:
+ {
+ gst_buffer_unref (buffer);
+ GST_WARNING_OBJECT (alawdec, "no input format set: not-negotiated");
+ return GST_FLOW_NOT_NEGOTIATED;
+ }
+alloc_failed:
+ {
+ gst_buffer_unref (buffer);
+ GST_DEBUG_OBJECT (alawdec, "pad alloc failed, flow: %s",
+ gst_flow_get_name (ret));
+ return ret;
+ }
+}
+
+static GstStateChangeReturn
+gst_alaw_dec_change_state (GstElement * element, GstStateChange transition)
+{
+ GstStateChangeReturn ret;
+ GstALawDec *dec = GST_ALAW_DEC (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;
+}
diff --git a/gst/law/alaw-decode.h b/gst/law/alaw-decode.h
new file mode 100644
index 0000000..55433cc
--- /dev/null
+++ b/gst/law/alaw-decode.h
@@ -0,0 +1,58 @@
+/* GStreamer A-Law to PCM conversion
+ * Copyright (C) 2000 by Abramo Bagnara <abramo@alsa-project.org>
+ *
+ * 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.
+ */
+
+#ifndef __GST_ALAW_DECODE_H__
+#define __GST_ALAW_DECODE_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_ALAW_DEC \
+ (gst_alaw_dec_get_type())
+#define GST_ALAW_DEC(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALAW_DEC,GstALawDec))
+#define GST_ALAW_DEC_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALAW_DEC,GstALawDecClass))
+#define GST_IS_ALAW_DEC(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALAW_DEC))
+#define GST_IS_ALAW_DEC_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALAW_DEC))
+
+typedef struct _GstALawDec GstALawDec;
+typedef struct _GstALawDecClass GstALawDecClass;
+
+struct _GstALawDec {
+ GstElement element;
+
+ GstPad *sinkpad,*srcpad;
+ gint rate;
+ gint channels;
+};
+
+struct _GstALawDecClass {
+ GstElementClass parent_class;
+};
+
+GType gst_alaw_dec_get_type(void);
+
+G_END_DECLS
+
+#endif /* __GST_ALAW_DECODE_H__ */
+
diff --git a/gst/law/alaw-encode.c b/gst/law/alaw-encode.c
new file mode 100644
index 0000000..f5514ce
--- /dev/null
+++ b/gst/law/alaw-encode.c
@@ -0,0 +1,524 @@
+/* GStreamer PCM to A-Law conversion
+ * Copyright (C) 2000 by Abramo Bagnara <abramo@alsa-project.org>
+ *
+ * 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 2.1 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-alawenc
+ *
+ * This element encode alaw audio. Alaw coding is also known as G.711.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "alaw-encode.h"
+
+GST_DEBUG_CATEGORY_STATIC (alaw_enc_debug);
+#define GST_CAT_DEFAULT alaw_enc_debug
+
+extern GstStaticPadTemplate alaw_enc_src_factory;
+extern GstStaticPadTemplate alaw_enc_sink_factory;
+
+static GstFlowReturn gst_alaw_enc_chain (GstPad * pad, GstBuffer * buffer);
+
+GST_BOILERPLATE (GstALawEnc, gst_alaw_enc, GstElement, GST_TYPE_ELEMENT);
+
+/* some day we might have defines in gstconfig.h that tell us about the
+ * desired cpu/memory/binary size trade-offs */
+#define GST_ALAW_ENC_USE_TABLE
+
+#ifdef GST_ALAW_ENC_USE_TABLE
+
+static const guint8 alaw_encode[2048 + 1] = {
+ 0xd5, 0xd4, 0xd7, 0xd6, 0xd1, 0xd0, 0xd3, 0xd2, 0xdd, 0xdc, 0xdf, 0xde,
+ 0xd9, 0xd8, 0xdb, 0xda, 0xc5, 0xc4, 0xc7, 0xc6, 0xc1, 0xc0, 0xc3, 0xc2,
+ 0xcd, 0xcc, 0xcf, 0xce, 0xc9, 0xc8, 0xcb, 0xca, 0xf5, 0xf5, 0xf4, 0xf4,
+ 0xf7, 0xf7, 0xf6, 0xf6, 0xf1, 0xf1, 0xf0, 0xf0, 0xf3, 0xf3, 0xf2, 0xf2,
+ 0xfd, 0xfd, 0xfc, 0xfc, 0xff, 0xff, 0xfe, 0xfe, 0xf9, 0xf9, 0xf8, 0xf8,
+ 0xfb, 0xfb, 0xfa, 0xfa, 0xe5, 0xe5, 0xe5, 0xe5, 0xe4, 0xe4, 0xe4, 0xe4,
+ 0xe7, 0xe7, 0xe7, 0xe7, 0xe6, 0xe6, 0xe6, 0xe6, 0xe1, 0xe1, 0xe1, 0xe1,
+ 0xe0, 0xe0, 0xe0, 0xe0, 0xe3, 0xe3, 0xe3, 0xe3, 0xe2, 0xe2, 0xe2, 0xe2,
+ 0xed, 0xed, 0xed, 0xed, 0xec, 0xec, 0xec, 0xec, 0xef, 0xef, 0xef, 0xef,
+ 0xee, 0xee, 0xee, 0xee, 0xe9, 0xe9, 0xe9, 0xe9, 0xe8, 0xe8, 0xe8, 0xe8,
+ 0xeb, 0xeb, 0xeb, 0xeb, 0xea, 0xea, 0xea, 0xea, 0x95, 0x95, 0x95, 0x95,
+ 0x95, 0x95, 0x95, 0x95, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94,
+ 0x97, 0x97, 0x97, 0x97, 0x97, 0x97, 0x97, 0x97, 0x96, 0x96, 0x96, 0x96,
+ 0x96, 0x96, 0x96, 0x96, 0x91, 0x91, 0x91, 0x91, 0x91, 0x91, 0x91, 0x91,
+ 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x93, 0x93, 0x93, 0x93,
+ 0x93, 0x93, 0x93, 0x93, 0x92, 0x92, 0x92, 0x92, 0x92, 0x92, 0x92, 0x92,
+ 0x9d, 0x9d, 0x9d, 0x9d, 0x9d, 0x9d, 0x9d, 0x9d, 0x9c, 0x9c, 0x9c, 0x9c,
+ 0x9c, 0x9c, 0x9c, 0x9c, 0x9f, 0x9f, 0x9f, 0x9f, 0x9f, 0x9f, 0x9f, 0x9f,
+ 0x9e, 0x9e, 0x9e, 0x9e, 0x9e, 0x9e, 0x9e, 0x9e, 0x99, 0x99, 0x99, 0x99,
+ 0x99, 0x99, 0x99, 0x99, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98,
+ 0x9b, 0x9b, 0x9b, 0x9b, 0x9b, 0x9b, 0x9b, 0x9b, 0x9a, 0x9a, 0x9a, 0x9a,
+ 0x9a, 0x9a, 0x9a, 0x9a, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85,
+ 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x84, 0x84, 0x84, 0x84,
+ 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84,
+ 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87,
+ 0x87, 0x87, 0x87, 0x87, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86,
+ 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x81, 0x81, 0x81, 0x81,
+ 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
+ 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+ 0x80, 0x80, 0x80, 0x80, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
+ 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x82, 0x82, 0x82, 0x82,
+ 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
+ 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d,
+ 0x8d, 0x8d, 0x8d, 0x8d, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c,
+ 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8f, 0x8f, 0x8f, 0x8f,
+ 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f,
+ 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e,
+ 0x8e, 0x8e, 0x8e, 0x8e, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89,
+ 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x88, 0x88, 0x88, 0x88,
+ 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88,
+ 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b,
+ 0x8b, 0x8b, 0x8b, 0x8b, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a,
+ 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0xb5, 0xb5, 0xb5, 0xb5,
+ 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5,
+ 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5,
+ 0xb5, 0xb5, 0xb5, 0xb5, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4,
+ 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4,
+ 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4,
+ 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7,
+ 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7,
+ 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb6, 0xb6, 0xb6, 0xb6,
+ 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6,
+ 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6,
+ 0xb6, 0xb6, 0xb6, 0xb6, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1,
+ 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1,
+ 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1,
+ 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0,
+ 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0,
+ 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb3, 0xb3, 0xb3, 0xb3,
+ 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3,
+ 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3, 0xb3,
+ 0xb3, 0xb3, 0xb3, 0xb3, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2,
+ 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2,
+ 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2,
+ 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd,
+ 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd,
+ 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbc, 0xbc, 0xbc, 0xbc,
+ 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc,
+ 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc,
+ 0xbc, 0xbc, 0xbc, 0xbc, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
+ 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
+ 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
+ 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe,
+ 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe,
+ 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xb9, 0xb9, 0xb9, 0xb9,
+ 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9,
+ 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9,
+ 0xb9, 0xb9, 0xb9, 0xb9, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8,
+ 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8,
+ 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8,
+ 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
+ 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
+ 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xba, 0xba, 0xba, 0xba,
+ 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba,
+ 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba, 0xba,
+ 0xba, 0xba, 0xba, 0xba, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5,
+ 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5,
+ 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5,
+ 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5,
+ 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5,
+ 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa5, 0xa4, 0xa4, 0xa4, 0xa4,
+ 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4,
+ 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4,
+ 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4,
+ 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4,
+ 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4,
+ 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7,
+ 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7,
+ 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7,
+ 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7,
+ 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7,
+ 0xa7, 0xa7, 0xa7, 0xa7, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6,
+ 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6,
+ 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6,
+ 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6,
+ 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6,
+ 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa1, 0xa1, 0xa1, 0xa1,
+ 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1,
+ 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1,
+ 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1,
+ 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1,
+ 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1,
+ 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0,
+ 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0,
+ 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0,
+ 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0,
+ 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0,
+ 0xa0, 0xa0, 0xa0, 0xa0, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3,
+ 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3,
+ 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3,
+ 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3,
+ 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3,
+ 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa2, 0xa2, 0xa2, 0xa2,
+ 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2,
+ 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2,
+ 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2,
+ 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2,
+ 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2, 0xa2,
+ 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad,
+ 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad,
+ 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad,
+ 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad,
+ 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad,
+ 0xad, 0xad, 0xad, 0xad, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac,
+ 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac,
+ 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac,
+ 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac,
+ 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac,
+ 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xac, 0xaf, 0xaf, 0xaf, 0xaf,
+ 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf,
+ 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf,
+ 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf,
+ 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf,
+ 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf,
+ 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae,
+ 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae,
+ 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae,
+ 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae,
+ 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae,
+ 0xae, 0xae, 0xae, 0xae, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9,
+ 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9,
+ 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9,
+ 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9,
+ 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9,
+ 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa9, 0xa8, 0xa8, 0xa8, 0xa8,
+ 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8,
+ 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8,
+ 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8,
+ 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8,
+ 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8,
+ 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab,
+ 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab,
+ 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab,
+ 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab,
+ 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab,
+ 0xab, 0xab, 0xab, 0xab, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+ 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+ 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+ 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+ 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
+ 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0x2a
+};
+
+static inline guint8
+s16_to_alaw (gint16 pcm_val)
+{
+ if (pcm_val >= 0)
+ return alaw_encode[pcm_val / 16];
+ else
+ return (0x7F & alaw_encode[pcm_val / -16]);
+}
+
+#else /* GST_ALAW_ENC_USE_TABLE */
+
+/*
+ * s16_to_alaw() - Convert a 16-bit linear PCM value to 8-bit A-law
+ *
+ * s16_to_alaw() accepts an 16-bit integer and encodes it as A-law data.
+ *
+ * Linear Input Code Compressed Code
+ * ------------------------ ---------------
+ * 0000000wxyza 000wxyz
+ * 0000001wxyza 001wxyz
+ * 000001wxyzab 010wxyz
+ * 00001wxyzabc 011wxyz
+ * 0001wxyzabcd 100wxyz
+ * 001wxyzabcde 101wxyz
+ * 01wxyzabcdef 110wxyz
+ * 1wxyzabcdefg 111wxyz
+ *
+ * For further information see John C. Bellamy's Digital Telephony, 1982,
+ * John Wiley & Sons, pps 98-111 and 472-476.
+ */
+
+static inline gint
+val_seg (gint val)
+{
+ gint r = 1;
+
+ val >>= 8;
+ if (val & 0xf0) {
+ val >>= 4;
+ r += 4;
+ }
+ if (val & 0x0c) {
+ val >>= 2;
+ r += 2;
+ }
+ if (val & 0x02)
+ r += 1;
+ return r;
+}
+
+static inline guint8
+s16_to_alaw (gint pcm_val)
+{
+ gint seg;
+ guint8 mask;
+ guint8 aval;
+
+ if (pcm_val >= 0) {
+ mask = 0xD5;
+ } else {
+ mask = 0x55;
+ pcm_val = -pcm_val;
+ if (pcm_val > 0x7fff)
+ pcm_val = 0x7fff;
+ }
+
+ if (pcm_val < 256)
+ aval = pcm_val >> 4;
+ else {
+ /* Convert the scaled magnitude to segment number. */
+ seg = val_seg (pcm_val);
+ aval = (seg << 4) | ((pcm_val >> (seg + 3)) & 0x0f);
+ }
+ return aval ^ mask;
+}
+
+#endif /* GST_ALAW_ENC_USE_TABLE */
+
+static GstCaps *
+gst_alaw_enc_getcaps (GstPad * pad)
+{
+ GstALawEnc *alawenc;
+ GstPad *otherpad;
+ GstCaps *othercaps, *result;
+ const GstCaps *templ;
+ const gchar *name;
+ gint i;
+
+ alawenc = GST_ALAW_ENC (GST_PAD_PARENT (pad));
+
+ /* figure out the name of the caps we are going to return */
+ if (pad == alawenc->srcpad) {
+ name = "audio/x-alaw";
+ otherpad = alawenc->sinkpad;
+ } else {
+ name = "audio/x-raw-int";
+ otherpad = alawenc->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 == alawenc->srcpad) {
+ /* 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;
+}
+
+static gboolean
+gst_alaw_enc_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstALawEnc *alawenc;
+ GstPad *otherpad;
+ GstStructure *structure;
+ gboolean ret;
+ GstCaps *base_caps;
+
+ alawenc = GST_ALAW_ENC (GST_PAD_PARENT (pad));
+
+ structure = gst_caps_get_structure (caps, 0);
+ gst_structure_get_int (structure, "channels", &alawenc->channels);
+ gst_structure_get_int (structure, "rate", &alawenc->rate);
+
+ if (pad == alawenc->sinkpad) {
+ otherpad = alawenc->srcpad;
+ } else {
+ otherpad = alawenc->sinkpad;
+ }
+
+ base_caps = gst_caps_copy (gst_pad_get_pad_template_caps (otherpad));
+ structure = gst_caps_get_structure (base_caps, 0);
+ gst_structure_set (structure, "rate", G_TYPE_INT, alawenc->rate, NULL);
+ gst_structure_set (structure, "channels", G_TYPE_INT, alawenc->channels,
+ NULL);
+
+ GST_DEBUG_OBJECT (alawenc, "rate=%d, channels=%d", alawenc->rate,
+ alawenc->channels);
+
+ ret = gst_pad_set_caps (otherpad, base_caps);
+
+ gst_caps_unref (base_caps);
+
+ return ret;
+}
+
+static void
+gst_alaw_enc_base_init (gpointer klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&alaw_enc_src_factory));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&alaw_enc_sink_factory));
+
+ gst_element_class_set_details_simple (element_class,
+ "A Law audio encoder", "Codec/Encoder/Audio",
+ "Convert 16bit PCM to 8bit A law",
+ "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
+
+ GST_DEBUG_CATEGORY_INIT (alaw_enc_debug, "alawenc", 0, "A Law audio encoder");
+}
+
+static void
+gst_alaw_enc_class_init (GstALawEncClass * klass)
+{
+ /* nothing to do here for now */
+}
+
+static void
+gst_alaw_enc_init (GstALawEnc * alawenc, GstALawEncClass * klass)
+{
+ alawenc->sinkpad =
+ gst_pad_new_from_static_template (&alaw_enc_sink_factory, "sink");
+ gst_pad_set_setcaps_function (alawenc->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_alaw_enc_setcaps));
+ gst_pad_set_getcaps_function (alawenc->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_alaw_enc_getcaps));
+ gst_pad_set_chain_function (alawenc->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_alaw_enc_chain));
+ gst_element_add_pad (GST_ELEMENT (alawenc), alawenc->sinkpad);
+
+ alawenc->srcpad =
+ gst_pad_new_from_static_template (&alaw_enc_src_factory, "src");
+ gst_pad_set_setcaps_function (alawenc->srcpad,
+ GST_DEBUG_FUNCPTR (gst_alaw_enc_setcaps));
+ gst_pad_set_getcaps_function (alawenc->srcpad,
+ GST_DEBUG_FUNCPTR (gst_alaw_enc_getcaps));
+ gst_pad_use_fixed_caps (alawenc->srcpad);
+ gst_element_add_pad (GST_ELEMENT (alawenc), alawenc->srcpad);
+
+ /* init rest */
+ alawenc->channels = 0;
+ alawenc->rate = 0;
+}
+
+static GstFlowReturn
+gst_alaw_enc_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstALawEnc *alawenc;
+ gint16 *linear_data;
+ guint linear_size;
+ guint8 *alaw_data;
+ guint alaw_size;
+ GstBuffer *outbuf;
+ gint i;
+ GstFlowReturn ret;
+ GstClockTime timestamp, duration;
+
+ alawenc = GST_ALAW_ENC (GST_PAD_PARENT (pad));
+
+ if (G_UNLIKELY (alawenc->rate == 0 || alawenc->channels == 0))
+ goto not_negotiated;
+
+ linear_data = (gint16 *) GST_BUFFER_DATA (buffer);
+ linear_size = GST_BUFFER_SIZE (buffer);
+
+ alaw_size = linear_size / 2;
+
+ timestamp = GST_BUFFER_TIMESTAMP (buffer);
+ duration = GST_BUFFER_DURATION (buffer);
+
+ GST_LOG_OBJECT (alawenc, "buffer with ts=%" GST_TIME_FORMAT,
+ GST_TIME_ARGS (timestamp));
+
+ ret =
+ gst_pad_alloc_buffer_and_set_caps (alawenc->srcpad,
+ GST_BUFFER_OFFSET_NONE, alaw_size, GST_PAD_CAPS (alawenc->srcpad),
+ &outbuf);
+ if (ret != GST_FLOW_OK)
+ goto done;
+
+ if (duration == GST_CLOCK_TIME_NONE) {
+ duration = gst_util_uint64_scale_int (alaw_size,
+ GST_SECOND, alawenc->rate * alawenc->channels);
+ }
+
+ if (GST_BUFFER_SIZE (outbuf) < alaw_size) {
+ /* pad-alloc can return a smaller buffer */
+ gst_buffer_unref (outbuf);
+ outbuf = gst_buffer_new_and_alloc (alaw_size);
+ }
+
+ alaw_data = (guint8 *) 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) = timestamp;
+ GST_BUFFER_DURATION (outbuf) = duration;
+
+ gst_buffer_set_caps (outbuf, GST_PAD_CAPS (alawenc->srcpad));
+
+ for (i = 0; i < alaw_size; i++) {
+ alaw_data[i] = s16_to_alaw (linear_data[i]);
+ }
+
+ ret = gst_pad_push (alawenc->srcpad, outbuf);
+
+done:
+
+ gst_buffer_unref (buffer);
+
+ return ret;
+
+not_negotiated:
+ {
+ ret = GST_FLOW_NOT_NEGOTIATED;
+ goto done;
+ }
+}
diff --git a/gst/law/alaw-encode.h b/gst/law/alaw-encode.h
new file mode 100644
index 0000000..3ca53a6
--- /dev/null
+++ b/gst/law/alaw-encode.h
@@ -0,0 +1,59 @@
+/* GStreamer PCM to A-Law conversion
+ * Copyright (C) 2000 by Abramo Bagnara <abramo@alsa-project.org>
+ *
+ * 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.
+ */
+
+
+#ifndef __GST_ALAW_ENCODE_H__
+#define __GST_ALAW_ENCODE_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_ALAW_ENC \
+ (gst_alaw_enc_get_type())
+#define GST_ALAW_ENC(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALAW_ENC,GstALawEnc))
+#define GST_ALAW_ENC_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALAW_ENC,GstALawEncClass))
+#define GST_IS_ALAW_ENC(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALAW_ENC))
+#define GST_IS_ALAW_ENC_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALAW_ENC))
+
+typedef struct _GstALawEnc GstALawEnc;
+typedef struct _GstALawEncClass GstALawEncClass;
+
+struct _GstALawEnc {
+ GstElement element;
+
+ GstPad *sinkpad,*srcpad;
+
+ gint channels;
+ gint rate;
+};
+
+struct _GstALawEncClass {
+ GstElementClass parent_class;
+};
+
+GType gst_alaw_enc_get_type(void);
+
+G_END_DECLS
+
+#endif /* __GST_ALAW_ENCODE_H__ */
diff --git a/gst/law/alaw.c b/gst/law/alaw.c
new file mode 100644
index 0000000..0442935
--- /dev/null
+++ b/gst/law/alaw.c
@@ -0,0 +1,77 @@
+/* GStreamer PCM/A-Law conversions
+ *
+ * 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 2.1 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "alaw-encode.h"
+#include "alaw-decode.h"
+
+GstStaticPadTemplate alaw_dec_src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-raw-int, "
+ "rate = (int) [ 8000, 192000 ], "
+ "channels = (int) [ 1, 2 ], "
+ "endianness = (int) BYTE_ORDER, "
+ "width = (int) 16, " "depth = (int) 16, " "signed = (boolean) True")
+ );
+
+GstStaticPadTemplate alaw_dec_sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-alaw, "
+ "rate = [ 8000 , 192000 ], " "channels = [ 1 , 2 ]")
+ );
+
+GstStaticPadTemplate alaw_enc_sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-raw-int, "
+ "rate = (int) [ 8000, 192000 ], "
+ "channels = (int) [ 1, 2 ], "
+ "endianness = (int) BYTE_ORDER, "
+ "width = (int) 16, " "depth = (int) 16, " "signed = (boolean) True")
+ );
+
+GstStaticPadTemplate alaw_enc_src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-alaw, "
+ "rate = [ 8000 , 192000 ], " "channels = [ 1 , 2 ]")
+ );
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ if (!gst_element_register (plugin, "alawenc",
+ GST_RANK_PRIMARY, GST_TYPE_ALAW_ENC) ||
+ !gst_element_register (plugin, "alawdec",
+ GST_RANK_PRIMARY, GST_TYPE_ALAW_DEC))
+ return FALSE;
+
+ return TRUE;
+}
+
+/* FIXME 0.11: merge alaw and mulaw into one plugin? */
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "alaw",
+ "ALaw audio conversion routines",
+ plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
diff --git a/gst/law/mulaw-conversion.c b/gst/law/mulaw-conversion.c
new file mode 100644
index 0000000..8afae80
--- /dev/null
+++ b/gst/law/mulaw-conversion.c
@@ -0,0 +1,118 @@
+/*
+ * This routine converts from linear to ulaw
+ * 29 September 1989
+ *
+ * Craig Reese: IDA/Supercomputing Research Center
+ * Joe Campbell: Department of Defense
+ *
+ * References:
+ * 1) CCITT Recommendation G.711 (very difficult to follow)
+ * 2) "A New Digital Technique for Implementation of Any
+ * Continuous PCM Companding Law," Villeret, Michel,
+ * et al. 1973 IEEE Int. Conf. on Communications, Vol 1,
+ * 1973, pg. 11.12-11.17
+ * 3) MIL-STD-188-113,"Interoperability and Performance Standards
+ * for Analog-to_Digital Conversion Techniques,"
+ * 17 February 1987
+ *
+ * Input: Signed 16 bit linear sample
+ * Output: 8 bit ulaw sample
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <glib.h>
+
+#include "mulaw-conversion.h"
+
+#undef ZEROTRAP /* turn on the trap as per the MIL-STD */
+#define BIAS 0x84 /* define the add-in bias for 16 bit samples */
+#define CLIP 32635
+
+void
+mulaw_encode (gint16 * in, guint8 * out, gint numsamples)
+{
+ static gint16 exp_lut[256] = { 0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
+ 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
+ };
+ gint16 sign, exponent, mantissa, i;
+ gint16 sample;
+ guint8 ulawbyte;
+
+ for (i = 0; i < numsamples; i++) {
+ sample = in[i];
+ /** get the sample into sign-magnitude **/
+ sign = (sample >> 8) & 0x80; /* set aside the sign */
+ if (sign != 0) {
+ sample = -sample; /* get magnitude */
+ }
+ /* sample can be zero because we can overflow in the inversion,
+ * checking against the unsigned version solves this */
+ if (((guint16) sample) > CLIP)
+ sample = CLIP; /* clip the magnitude */
+
+ /** convert from 16 bit linear to ulaw **/
+ sample = sample + BIAS;
+ exponent = exp_lut[(sample >> 7) & 0xFF];
+ mantissa = (sample >> (exponent + 3)) & 0x0F;
+ ulawbyte = ~(sign | (exponent << 4) | mantissa);
+#ifdef ZEROTRAP
+ if (ulawbyte == 0)
+ ulawbyte = 0x02; /* optional CCITT trap */
+#endif
+ out[i] = ulawbyte;
+ }
+}
+
+/*
+ * This routine converts from ulaw to 16 bit linear
+ * 29 September 1989
+ *
+ * Craig Reese: IDA/Supercomputing Research Center
+ *
+ * References:
+ * 1) CCITT Recommendation G.711 (very difficult to follow)
+ * 2) MIL-STD-188-113,"Interoperability and Performance Standards
+ * for Analog-to_Digital Conversion Techniques,"
+ * 17 February 1987
+ *
+ * Input: 8 bit ulaw sample
+ * Output: signed 16 bit linear sample
+ */
+
+void
+mulaw_decode (guint8 * in, gint16 * out, gint numsamples)
+{
+ static gint16 exp_lut[8] = { 0, 132, 396, 924, 1980, 4092, 8316, 16764 };
+ gint16 sign, exponent, mantissa;
+ guint8 ulawbyte;
+ gint16 linear, i;
+
+ for (i = 0; i < numsamples; i++) {
+ ulawbyte = in[i];
+ ulawbyte = ~ulawbyte;
+ sign = (ulawbyte & 0x80);
+ exponent = (ulawbyte >> 4) & 0x07;
+ mantissa = ulawbyte & 0x0F;
+ linear = exp_lut[exponent] + (mantissa << (exponent + 3));
+ if (sign != 0)
+ linear = -linear;
+ out[i] = linear;
+ }
+}
diff --git a/gst/law/mulaw-conversion.h b/gst/law/mulaw-conversion.h
new file mode 100644
index 0000000..38367ad
--- /dev/null
+++ b/gst/law/mulaw-conversion.h
@@ -0,0 +1,12 @@
+#ifndef _GST_ULAW_CONVERSION_H
+#define _GST_ULAW_CONVERSION_H
+
+#include <glib.h>
+
+void
+mulaw_encode(gint16* in, guint8* out, gint numsamples);
+void
+mulaw_decode(guint8* in,gint16* out,gint numsamples);
+
+#endif /* _GST_ULAW_CONVERSION_H */
+
diff --git a/gst/law/mulaw-decode.c b/gst/law/mulaw-decode.c
new file mode 100644
index 0000000..40347ab
--- /dev/null
+++ b/gst/law/mulaw-decode.c
@@ -0,0 +1,307 @@
+/* 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;
+ const 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);
+
+ 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_simple (element_class, "Mu Law audio decoder",
+ "Codec/Decoder/Audio",
+ "Convert 8bit mu law to 16bit PCM",
+ "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
+}
+
+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;
+}
diff --git a/gst/law/mulaw-decode.h b/gst/law/mulaw-decode.h
new file mode 100644
index 0000000..9585118
--- /dev/null
+++ b/gst/law/mulaw-decode.h
@@ -0,0 +1,58 @@
+/* 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.
+ */
+
+#ifndef __GST_MULAWDECODE_H__
+#define __GST_MULAWDECODE_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_MULAWDEC \
+ (gst_mulawdec_get_type())
+#define GST_MULAWDEC(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MULAWDEC,GstMuLawDec))
+#define GST_MULAWDEC_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MULAWDEC,GstMuLawDecClass))
+#define GST_IS_MULAWDEC(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MULAWDEC))
+#define GST_IS_MULAWDEC_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MULAWDEC))
+
+typedef struct _GstMuLawDec GstMuLawDec;
+typedef struct _GstMuLawDecClass GstMuLawDecClass;
+
+struct _GstMuLawDec {
+ GstElement element;
+
+ GstPad *sinkpad,*srcpad;
+
+ gint rate;
+ gint channels;
+};
+
+struct _GstMuLawDecClass {
+ GstElementClass parent_class;
+};
+
+GType gst_mulawdec_get_type(void);
+
+G_END_DECLS
+
+#endif /* __GST_STEREO_H__ */
diff --git a/gst/law/mulaw-encode.c b/gst/law/mulaw-encode.c
new file mode 100644
index 0000000..0ab1a1e
--- /dev/null
+++ b/gst/law/mulaw-encode.c
@@ -0,0 +1,297 @@
+/* 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-mulawenc
+ *
+ * This element encode mulaw audio. Mulaw coding is also known as G.711.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <gst/gst.h>
+#include "mulaw-encode.h"
+#include "mulaw-conversion.h"
+
+extern GstStaticPadTemplate mulaw_enc_src_factory;
+extern GstStaticPadTemplate mulaw_enc_sink_factory;
+
+/* Stereo signals and args */
+enum
+{
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum
+{
+ ARG_0
+};
+
+static void gst_mulawenc_class_init (GstMuLawEncClass * klass);
+static void gst_mulawenc_base_init (GstMuLawEncClass * klass);
+static void gst_mulawenc_init (GstMuLawEnc * mulawenc);
+
+static GstFlowReturn gst_mulawenc_chain (GstPad * pad, GstBuffer * buffer);
+
+static GstElementClass *parent_class = NULL;
+
+/*static guint gst_stereo_signals[LAST_SIGNAL] = { 0 }; */
+
+static GstCaps *
+mulawenc_getcaps (GstPad * pad)
+{
+ GstMuLawEnc *mulawenc;
+ GstPad *otherpad;
+ GstCaps *othercaps, *result;
+ const GstCaps *templ;
+ const gchar *name;
+ gint i;
+
+ mulawenc = GST_MULAWENC (GST_PAD_PARENT (pad));
+
+ /* figure out the name of the caps we are going to return */
+ if (pad == mulawenc->srcpad) {
+ name = "audio/x-mulaw";
+ otherpad = mulawenc->sinkpad;
+ } else {
+ name = "audio/x-raw-int";
+ otherpad = mulawenc->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 == mulawenc->srcpad) {
+ /* 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;
+}
+
+static gboolean
+mulawenc_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstMuLawEnc *mulawenc;
+ GstPad *otherpad;
+ GstStructure *structure;
+ GstCaps *base_caps;
+
+ mulawenc = GST_MULAWENC (gst_pad_get_parent (pad));
+
+ structure = gst_caps_get_structure (caps, 0);
+ gst_structure_get_int (structure, "channels", &mulawenc->channels);
+ gst_structure_get_int (structure, "rate", &mulawenc->rate);
+
+ if (pad == mulawenc->sinkpad) {
+ otherpad = mulawenc->srcpad;
+ } else {
+ otherpad = mulawenc->sinkpad;
+ }
+ base_caps = gst_caps_copy (gst_pad_get_pad_template_caps (otherpad));
+
+ structure = gst_caps_get_structure (base_caps, 0);
+ gst_structure_set (structure, "rate", G_TYPE_INT, mulawenc->rate, NULL);
+ gst_structure_set (structure, "channels", G_TYPE_INT, mulawenc->channels,
+ NULL);
+
+ gst_pad_set_caps (otherpad, base_caps);
+
+ gst_object_unref (mulawenc);
+ gst_caps_unref (base_caps);
+
+ return TRUE;
+}
+
+GType
+gst_mulawenc_get_type (void)
+{
+ static GType mulawenc_type = 0;
+
+ if (!mulawenc_type) {
+ static const GTypeInfo mulawenc_info = {
+ sizeof (GstMuLawEncClass),
+ (GBaseInitFunc) gst_mulawenc_base_init,
+ NULL,
+ (GClassInitFunc) gst_mulawenc_class_init,
+ NULL,
+ NULL,
+ sizeof (GstMuLawEnc),
+ 0,
+ (GInstanceInitFunc) gst_mulawenc_init,
+ };
+
+ mulawenc_type =
+ g_type_register_static (GST_TYPE_ELEMENT, "GstMuLawEnc", &mulawenc_info,
+ 0);
+ }
+ return mulawenc_type;
+}
+
+static void
+gst_mulawenc_base_init (GstMuLawEncClass * klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&mulaw_enc_src_factory));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&mulaw_enc_sink_factory));
+ gst_element_class_set_details_simple (element_class, "Mu Law audio encoder",
+ "Codec/Encoder/Audio",
+ "Convert 16bit PCM to 8bit mu law",
+ "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
+}
+
+static void
+gst_mulawenc_class_init (GstMuLawEncClass * klass)
+{
+ parent_class = g_type_class_peek_parent (klass);
+}
+
+static void
+gst_mulawenc_init (GstMuLawEnc * mulawenc)
+{
+ mulawenc->sinkpad =
+ gst_pad_new_from_static_template (&mulaw_enc_sink_factory, "sink");
+ gst_pad_set_setcaps_function (mulawenc->sinkpad, mulawenc_setcaps);
+ gst_pad_set_getcaps_function (mulawenc->sinkpad, mulawenc_getcaps);
+ gst_pad_set_chain_function (mulawenc->sinkpad, gst_mulawenc_chain);
+ gst_element_add_pad (GST_ELEMENT (mulawenc), mulawenc->sinkpad);
+
+ mulawenc->srcpad =
+ gst_pad_new_from_static_template (&mulaw_enc_src_factory, "src");
+ gst_pad_set_setcaps_function (mulawenc->srcpad, mulawenc_setcaps);
+ gst_pad_set_getcaps_function (mulawenc->srcpad, mulawenc_getcaps);
+ gst_pad_use_fixed_caps (mulawenc->srcpad);
+ gst_element_add_pad (GST_ELEMENT (mulawenc), mulawenc->srcpad);
+
+ /* init rest */
+ mulawenc->channels = 0;
+ mulawenc->rate = 0;
+}
+
+static GstFlowReturn
+gst_mulawenc_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstMuLawEnc *mulawenc;
+ gint16 *linear_data;
+ guint linear_size;
+ guint8 *mulaw_data;
+ guint mulaw_size;
+ GstBuffer *outbuf;
+ GstFlowReturn ret;
+ GstClockTime timestamp, duration;
+
+ mulawenc = GST_MULAWENC (gst_pad_get_parent (pad));
+
+ if (!mulawenc->rate || !mulawenc->channels)
+ goto not_negotiated;
+
+ linear_data = (gint16 *) GST_BUFFER_DATA (buffer);
+ linear_size = GST_BUFFER_SIZE (buffer);
+
+ mulaw_size = linear_size / 2;
+
+ timestamp = GST_BUFFER_TIMESTAMP (buffer);
+ duration = GST_BUFFER_DURATION (buffer);
+
+ ret = gst_pad_alloc_buffer_and_set_caps (mulawenc->srcpad,
+ GST_BUFFER_OFFSET_NONE, mulaw_size, GST_PAD_CAPS (mulawenc->srcpad),
+ &outbuf);
+ if (ret != GST_FLOW_OK)
+ goto alloc_failed;
+
+ if (duration == -1) {
+ duration = gst_util_uint64_scale_int (mulaw_size,
+ GST_SECOND, mulawenc->rate * mulawenc->channels);
+ }
+
+ if (GST_BUFFER_SIZE (outbuf) < mulaw_size) {
+ /* pad-alloc can suggest a smaller size */
+ gst_buffer_unref (outbuf);
+ outbuf = gst_buffer_new_and_alloc (mulaw_size);
+ }
+
+ mulaw_data = (guint8 *) 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) = timestamp;
+ GST_BUFFER_DURATION (outbuf) = duration;
+
+ gst_buffer_set_caps (outbuf, GST_PAD_CAPS (mulawenc->srcpad));
+
+ mulaw_encode (linear_data, mulaw_data, mulaw_size);
+
+ gst_buffer_unref (buffer);
+
+ ret = gst_pad_push (mulawenc->srcpad, outbuf);
+
+done:
+ gst_object_unref (mulawenc);
+
+ return ret;
+
+not_negotiated:
+ {
+ GST_DEBUG_OBJECT (mulawenc, "no format negotiated");
+ ret = GST_FLOW_NOT_NEGOTIATED;
+ gst_buffer_unref (buffer);
+ goto done;
+ }
+alloc_failed:
+ {
+ GST_DEBUG_OBJECT (mulawenc, "pad alloc failed");
+ gst_buffer_unref (buffer);
+ goto done;
+ }
+}
diff --git a/gst/law/mulaw-encode.h b/gst/law/mulaw-encode.h
new file mode 100644
index 0000000..f428c3c
--- /dev/null
+++ b/gst/law/mulaw-encode.h
@@ -0,0 +1,59 @@
+/* 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.
+ */
+
+
+#ifndef __GST_MULAWENCODE_H__
+#define __GST_MULAWENCODE_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_MULAWENC \
+ (gst_mulawenc_get_type())
+#define GST_MULAWENC(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MULAWENC,GstMuLawEnc))
+#define GST_MULAWENC_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MULAWENC,GstMuLawEncClass))
+#define GST_IS_MULAWENC(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MULAWENC))
+#define GST_IS_MULAWENC_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MULAWENC))
+
+typedef struct _GstMuLawEnc GstMuLawEnc;
+typedef struct _GstMuLawEncClass GstMuLawEncClass;
+
+struct _GstMuLawEnc {
+ GstElement element;
+
+ GstPad *sinkpad,*srcpad;
+
+ gint channels;
+ gint rate;
+};
+
+struct _GstMuLawEncClass {
+ GstElementClass parent_class;
+};
+
+GType gst_mulawenc_get_type(void);
+
+G_END_DECLS
+
+#endif /* __GST_STEREO_H__ */
diff --git a/gst/law/mulaw.c b/gst/law/mulaw.c
new file mode 100644
index 0000000..e8d9e72
--- /dev/null
+++ b/gst/law/mulaw.c
@@ -0,0 +1,75 @@
+/* GStreamer PCM/A-Law conversions
+ *
+ * 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 2.1 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include "mulaw-encode.h"
+#include "mulaw-decode.h"
+
+GstStaticPadTemplate mulaw_dec_src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-raw-int, "
+ "rate = (int) [ 8000, 192000 ], "
+ "channels = (int) [ 1, 2 ], "
+ "endianness = (int) BYTE_ORDER, "
+ "width = (int) 16, " "depth = (int) 16, " "signed = (boolean) True")
+ );
+
+GstStaticPadTemplate mulaw_dec_sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-mulaw, "
+ "rate = [ 8000 , 192000 ], " "channels = [ 1 , 2 ]")
+ );
+
+GstStaticPadTemplate mulaw_enc_sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-raw-int, "
+ "rate = (int) [ 8000, 192000 ], "
+ "channels = (int) [ 1, 2 ], "
+ "endianness = (int) BYTE_ORDER, "
+ "width = (int) 16, " "depth = (int) 16, " "signed = (boolean) True")
+ );
+
+GstStaticPadTemplate mulaw_enc_src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-mulaw, "
+ "rate = [ 8000 , 192000 ], " "channels = [ 1 , 2 ]")
+ );
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ if (!gst_element_register (plugin, "mulawenc",
+ GST_RANK_PRIMARY, GST_TYPE_MULAWENC) ||
+ !gst_element_register (plugin, "mulawdec",
+ GST_RANK_PRIMARY, GST_TYPE_MULAWDEC))
+ return FALSE;
+
+ return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "mulaw",
+ "MuLaw audio conversion routines",
+ plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)