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-rw-r--r--gst/law/alaw-decode.c120
1 files changed, 47 insertions, 73 deletions
diff --git a/gst/law/alaw-decode.c b/gst/law/alaw-decode.c
index 4e24102d..ea84fcba 100644
--- a/gst/law/alaw-decode.c
+++ b/gst/law/alaw-decode.c
@@ -1,7 +1,5 @@
-/* GStreamer
- * Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
- * PCM - A-Law conversion
- * Copyright (C) 2000 by Abramo Bagnara <abramo@alsa-project.org>
+/* 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
@@ -22,34 +20,20 @@
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <gst/gst.h>
+
#include "alaw-decode.h"
-extern GstPadTemplate *alawdec_src_template, *alawdec_sink_template;
+extern GstPadTemplate *alawdec_src_template;
+extern GstPadTemplate *alawdec_sink_template;
-/* Stereo signals and args */
-enum
-{
- /* FILL ME */
- LAST_SIGNAL
-};
+GST_DEBUG_CATEGORY_STATIC (alaw_dec_debug);
+#define GST_CAT_DEFAULT alaw_dec_debug
-enum
-{
- ARG_0
-};
-
-static void gst_alawdec_class_init (GstALawDecClass * klass);
-static void gst_alawdec_base_init (GstALawDecClass * klass);
-static void gst_alawdec_init (GstALawDec * alawdec);
static GstStateChangeReturn
-gst_alawdec_change_state (GstElement * element, GstStateChange transition);
-
-static GstFlowReturn gst_alawdec_chain (GstPad * pad, GstBuffer * buffer);
+gst_alaw_dec_change_state (GstElement * element, GstStateChange transition);
+static GstFlowReturn gst_alaw_dec_chain (GstPad * pad, GstBuffer * buffer);
-static GstElementClass *parent_class = NULL;
-
-/*static guint gst_stereo_signals[LAST_SIGNAL] = { 0 }; */
+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 */
@@ -121,14 +105,14 @@ alaw_to_s16 (guint8 a_val)
#endif /* GST_ALAW_DEC_USE_TABLE */
static gboolean
-alawdec_sink_setcaps (GstPad * pad, GstCaps * caps)
+gst_alaw_dec_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstALawDec *alawdec;
GstStructure *structure;
int rate, channels;
gboolean ret;
- alawdec = GST_ALAWDEC (GST_PAD_PARENT (pad));
+ alawdec = GST_ALAW_DEC (GST_PAD_PARENT (pad));
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (structure, "rate", &rate);
@@ -145,65 +129,42 @@ alawdec_sink_setcaps (GstPad * pad, GstCaps * caps)
"signed", G_TYPE_BOOLEAN, TRUE,
"rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, channels, NULL);
- return TRUE;
-}
+ GST_DEBUG_OBJECT (alawdec, "rate=%d, channels=%d", rate, channels);
-GType
-gst_alawdec_get_type (void)
-{
- static GType alawdec_type = 0;
-
- if (!alawdec_type) {
- static const GTypeInfo alawdec_info = {
- sizeof (GstALawDecClass),
- (GBaseInitFunc) gst_alawdec_base_init,
- NULL,
- (GClassInitFunc) gst_alawdec_class_init,
- NULL,
- NULL,
- sizeof (GstALawDec),
- 0,
- (GInstanceInitFunc) gst_alawdec_init,
- };
-
- alawdec_type =
- g_type_register_static (GST_TYPE_ELEMENT, "GstALawDec", &alawdec_info,
- 0);
- }
- return alawdec_type;
+ return TRUE;
}
static void
-gst_alawdec_base_init (GstALawDecClass * klass)
+gst_alaw_dec_base_init (gpointer klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
- const GstElementDetails alawdec_details =
- GST_ELEMENT_DETAILS ("A Law audio decoder",
- "Codec/Decoder/Audio",
- "Convert 8bit A law to 16bit PCM",
- "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
gst_element_class_add_pad_template (element_class, alawdec_src_template);
gst_element_class_add_pad_template (element_class, alawdec_sink_template);
- gst_element_class_set_details (element_class, &alawdec_details);
+
+ 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_alawdec_class_init (GstALawDecClass * klass)
+gst_alaw_dec_class_init (GstALawDecClass * klass)
{
GstElementClass *element_class = (GstElementClass *) klass;
- parent_class = g_type_class_peek_parent (klass);
-
- element_class->change_state = GST_DEBUG_FUNCPTR (gst_alawdec_change_state);
+ element_class->change_state = GST_DEBUG_FUNCPTR (gst_alaw_dec_change_state);
}
static void
-gst_alawdec_init (GstALawDec * alawdec)
+gst_alaw_dec_init (GstALawDec * alawdec, GstALawDecClass * klass)
{
alawdec->sinkpad = gst_pad_new_from_template (alawdec_sink_template, "sink");
- gst_pad_set_setcaps_function (alawdec->sinkpad, alawdec_sink_setcaps);
- gst_pad_set_chain_function (alawdec->sinkpad, gst_alawdec_chain);
+ gst_pad_set_setcaps_function (alawdec->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_alaw_dec_sink_setcaps));
+ 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_template (alawdec_src_template, "src");
@@ -212,7 +173,7 @@ gst_alawdec_init (GstALawDec * alawdec)
}
static GstFlowReturn
-gst_alawdec_chain (GstPad * pad, GstBuffer * buffer)
+gst_alaw_dec_chain (GstPad * pad, GstBuffer * buffer)
{
GstALawDec *alawdec;
gint16 *linear_data;
@@ -222,7 +183,13 @@ gst_alawdec_chain (GstPad * pad, GstBuffer * buffer)
gint i;
GstFlowReturn ret;
- alawdec = GST_ALAWDEC (gst_pad_get_parent (pad));
+ alawdec = GST_ALAW_DEC (GST_PAD_PARENT (pad));
+
+ if (G_UNLIKELY (alawdec->srccaps == NULL))
+ 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);
@@ -241,20 +208,27 @@ gst_alawdec_chain (GstPad * pad, GstBuffer * buffer)
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);
- gst_object_unref (alawdec);
+done:
+
+ gst_buffer_unref (buffer);
return ret;
+
+not_negotiated:
+ {
+ ret = GST_FLOW_NOT_NEGOTIATED;
+ goto done;
+ }
}
static GstStateChangeReturn
-gst_alawdec_change_state (GstElement * element, GstStateChange transition)
+gst_alaw_dec_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
- GstALawDec *dec = GST_ALAWDEC (element);
+ GstALawDec *dec = GST_ALAW_DEC (element);
switch (transition) {
default:
generated by cgit (git 2.34.1) at 2024-06-17 06:29:30 +0000