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-rw-r--r--gst/dvdlpcmdec/.gitignore7
-rw-r--r--gst/dvdlpcmdec/Makefile.am9
-rw-r--r--gst/dvdlpcmdec/gstdvdlpcmdec.c394
-rw-r--r--gst/dvdlpcmdec/gstdvdlpcmdec.h66
4 files changed, 476 insertions, 0 deletions
diff --git a/gst/dvdlpcmdec/.gitignore b/gst/dvdlpcmdec/.gitignore
new file mode 100644
index 00000000..08f5ed37
--- /dev/null
+++ b/gst/dvdlpcmdec/.gitignore
@@ -0,0 +1,7 @@
+Makefile
+Makefile.in
+*.o
+*.lo
+*.la
+.deps
+.libs
diff --git a/gst/dvdlpcmdec/Makefile.am b/gst/dvdlpcmdec/Makefile.am
new file mode 100644
index 00000000..31e51169
--- /dev/null
+++ b/gst/dvdlpcmdec/Makefile.am
@@ -0,0 +1,9 @@
+
+plugin_LTLIBRARIES = libgstdvdlpcmdec.la
+
+libgstdvdlpcmdec_la_SOURCES = gstdvdlpcmdec.c
+libgstdvdlpcmdec_la_CFLAGS = $(GST_CFLAGS)
+libgstdvdlpcmdec_la_LIBADD =
+libgstdvdlpcmdec_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
+noinst_HEADERS = gstdvdlpcmdec.h
diff --git a/gst/dvdlpcmdec/gstdvdlpcmdec.c b/gst/dvdlpcmdec/gstdvdlpcmdec.c
new file mode 100644
index 00000000..2062d14d
--- /dev/null
+++ b/gst/dvdlpcmdec/gstdvdlpcmdec.c
@@ -0,0 +1,394 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2005> Jan Schmidt <jan@noraisin.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+/* Element-Checklist-Version: TODO */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <stdlib.h>
+#include <string.h>
+
+#include "gstdvdlpcmdec.h"
+#include <gst/audio/audio.h>
+
+GST_DEBUG_CATEGORY_STATIC (dvdlpcm_debug);
+#define GST_CAT_DEFAULT dvdlpcm_debug
+
+/* elementfactory information */
+static GstElementDetails gst_dvdlpcmdec_details =
+GST_ELEMENT_DETAILS ("DVD LPCM Audio decoder",
+ "Codec/Demuxer/Audio",
+ "Decode DVD LPCM frames into standard PCM audio",
+ "Jan Schmidt <jan@noraisin.net>");
+
+static GstStaticPadTemplate gst_dvdlpcmdec_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-dvd-lpcm, "
+ "width = (int) { 16, 20, 24 }, "
+ "rate = (int) { 48000, 96000 }, "
+ "channels = (int) [ 1, 8 ], "
+ "dynamic_range = (int) [ 0, 255 ], "
+ "emphasis = (boolean) { TRUE, FALSE }, "
+ "mute = (boolean) { TRUE, FALSE }")
+ );
+
+static GstStaticPadTemplate gst_dvdlpcmdec_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS)
+ );
+
+/* DvdLpcmDec signals and args */
+enum
+{
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum
+{
+ ARG_0
+ /* FILL ME */
+};
+
+static void gst_dvdlpcmdec_base_init (gpointer g_class);
+static void gst_dvdlpcmdec_class_init (GstDvdLpcmDecClass * klass);
+static void gst_dvdlpcmdec_init (GstDvdLpcmDec * dvdlpcmdec);
+
+static void gst_dvdlpcmdec_chain (GstPad * pad, GstData * _data);
+static GstPadLinkReturn gst_dvdlpcmdec_link (GstPad * pad,
+ const GstCaps * caps);
+
+static GstElementStateReturn gst_dvdlpcmdec_change_state (GstElement * element);
+
+static GstElementClass *parent_class = NULL;
+
+GType
+gst_dvdlpcmdec_get_type (void)
+{
+ static GType dvdlpcmdec_type = 0;
+
+ if (!dvdlpcmdec_type) {
+ static const GTypeInfo dvdlpcmdec_info = {
+ sizeof (GstDvdLpcmDecClass),
+ gst_dvdlpcmdec_base_init,
+ NULL,
+ (GClassInitFunc) gst_dvdlpcmdec_class_init,
+ NULL,
+ NULL,
+ sizeof (GstDvdLpcmDec),
+ 0,
+ (GInstanceInitFunc) gst_dvdlpcmdec_init,
+ };
+
+ dvdlpcmdec_type =
+ g_type_register_static (GST_TYPE_ELEMENT, "GstDvdLpcmDec",
+ &dvdlpcmdec_info, 0);
+ }
+ return dvdlpcmdec_type;
+}
+
+static void
+gst_dvdlpcmdec_base_init (gpointer g_class)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_dvdlpcmdec_sink_template));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_dvdlpcmdec_src_template));
+ gst_element_class_set_details (element_class, &gst_dvdlpcmdec_details);
+}
+
+static void
+gst_dvdlpcmdec_class_init (GstDvdLpcmDecClass * klass)
+{
+ GstElementClass *gstelement_class;
+
+ gstelement_class = (GstElementClass *) klass;
+
+ parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+ gstelement_class->change_state = gst_dvdlpcmdec_change_state;
+}
+
+static void
+gst_dvdlpcm_reset (GstDvdLpcmDec * dvdlpcmdec)
+{
+ dvdlpcmdec->rate = 0;
+ dvdlpcmdec->channels = 0;
+ dvdlpcmdec->width = 0;
+ dvdlpcmdec->out_width = 0;
+ dvdlpcmdec->dynamic_range = 0;
+ dvdlpcmdec->emphasis = FALSE;
+ dvdlpcmdec->mute = FALSE;
+ dvdlpcmdec->offset = 0;
+
+ gst_pad_set_explicit_caps (dvdlpcmdec->srcpad, NULL);
+}
+
+static void
+gst_dvdlpcmdec_init (GstDvdLpcmDec * dvdlpcmdec)
+{
+ dvdlpcmdec->sinkpad =
+ gst_pad_new_from_template (gst_static_pad_template_get
+ (&gst_dvdlpcmdec_sink_template), "sink");
+ gst_pad_set_link_function (dvdlpcmdec->sinkpad, gst_dvdlpcmdec_link);
+ gst_pad_set_chain_function (dvdlpcmdec->sinkpad, gst_dvdlpcmdec_chain);
+ gst_element_add_pad (GST_ELEMENT (dvdlpcmdec), dvdlpcmdec->sinkpad);
+
+ dvdlpcmdec->srcpad =
+ gst_pad_new_from_template (gst_static_pad_template_get
+ (&gst_dvdlpcmdec_src_template), "src");
+ gst_pad_use_explicit_caps (dvdlpcmdec->srcpad);
+ gst_element_add_pad (GST_ELEMENT (dvdlpcmdec), dvdlpcmdec->srcpad);
+
+ gst_dvdlpcm_reset (dvdlpcmdec);
+}
+
+
+static GstPadLinkReturn
+gst_dvdlpcmdec_link (GstPad * pad, const GstCaps * caps)
+{
+ GstStructure *structure;
+ gboolean res = TRUE;
+ GstDvdLpcmDec *dvdlpcmdec;
+ GstCaps *src_caps;
+
+ g_return_val_if_fail (caps != NULL, GST_PAD_LINK_REFUSED);
+ g_return_val_if_fail (pad != NULL, GST_PAD_LINK_REFUSED);
+
+ dvdlpcmdec = GST_DVDLPCMDEC (gst_pad_get_parent (pad));
+
+ structure = gst_caps_get_structure (caps, 0);
+
+ res &= gst_structure_get_int (structure, "rate", &dvdlpcmdec->rate);
+ res &= gst_structure_get_int (structure, "channels", &dvdlpcmdec->channels);
+ res &= gst_structure_get_int (structure, "width", &dvdlpcmdec->width);
+ res &= gst_structure_get_int (structure, "dynamic_range",
+ &dvdlpcmdec->dynamic_range);
+ res &= gst_structure_get_boolean (structure, "emphasis",
+ &dvdlpcmdec->emphasis);
+ res &= gst_structure_get_boolean (structure, "mute", &dvdlpcmdec->mute);
+
+ if (!res)
+ return GST_PAD_LINK_REFUSED;
+
+ /* Output width is the input width rounded up to the nearest byte */
+ if (dvdlpcmdec->width == 20)
+ dvdlpcmdec->out_width = 24;
+ else
+ dvdlpcmdec->out_width = dvdlpcmdec->width;
+
+ /* Build explicit caps to set on the src pad */
+ src_caps = gst_caps_new_simple ("audio/x-raw-int",
+ "rate", G_TYPE_INT, dvdlpcmdec->rate,
+ "channels", G_TYPE_INT, dvdlpcmdec->channels,
+ "endianness", G_TYPE_INT, G_BIG_ENDIAN,
+ "depth", G_TYPE_INT, dvdlpcmdec->out_width,
+ "width", G_TYPE_INT, dvdlpcmdec->out_width,
+ "signed", G_TYPE_BOOLEAN, TRUE, NULL);
+
+ GST_DEBUG_OBJECT (dvdlpcmdec, "Set rate %d, channels %d, width %d (out %d)",
+ dvdlpcmdec->rate, dvdlpcmdec->channels, dvdlpcmdec->width,
+ dvdlpcmdec->out_width);
+
+ if (!gst_pad_set_explicit_caps (dvdlpcmdec->srcpad, src_caps))
+ res = FALSE;
+
+ gst_caps_free (src_caps);
+
+ if (!res)
+ return GST_PAD_LINK_REFUSED;
+
+ return GST_PAD_LINK_OK;
+}
+
+static void
+gst_dvdlpcmdec_chain (GstPad * pad, GstData * _data)
+{
+ GstBuffer *buf = GST_BUFFER (_data);
+ GstDvdLpcmDec *dvdlpcmdec;
+ guchar *data;
+ gint64 size;
+
+ g_return_if_fail (pad != NULL);
+ g_return_if_fail (GST_IS_PAD (pad));
+ g_return_if_fail (buf != NULL);
+
+ dvdlpcmdec = GST_DVDLPCMDEC (gst_pad_get_parent (pad));
+
+ data = GST_BUFFER_DATA (buf);
+ size = GST_BUFFER_SIZE (buf);
+
+ GST_LOG_OBJECT (dvdlpcmdec, "got buffer %p of size %" G_GINT64_FORMAT, buf,
+ size);
+
+ if (dvdlpcmdec->rate == 0) {
+ GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, FORMAT, (NULL),
+ ("Buffer pushed before negotiation"));
+ gst_buffer_unref (buf);
+ return;
+ }
+
+ if (!GST_PAD_IS_USABLE (dvdlpcmdec->srcpad)) {
+ GST_DEBUG_OBJECT (dvdlpcmdec, "Discarding buffer on disabled pad");
+ gst_buffer_unref (buf);
+ return;
+ }
+
+ /* We don't currently do anything at all regarding emphasis, mute or
+ * dynamic_range - I'm not sure what they're for */
+ switch (dvdlpcmdec->width) {
+ case 16:
+ {
+ /* We can just pass 16-bits straight through intact */
+ dvdlpcmdec->offset += GST_BUFFER_SIZE (buf);
+ gst_pad_push (dvdlpcmdec->srcpad, GST_DATA (buf));
+ return;
+ }
+ case 20:
+ {
+ /* Allocate a new buffer and copy 20-bit width to 24-bit */
+ gint64 samples = size * 8 / 20;
+ gint64 count = size / 10;
+ gint64 i;
+ guchar *src;
+ guchar *dest;
+ GstBuffer *outbuf;
+
+ if (count * 10 != samples * 3) {
+ g_print ("bleh\n");
+ }
+ outbuf = gst_pad_alloc_buffer (dvdlpcmdec->srcpad, dvdlpcmdec->offset,
+ samples * 3);
+ if (!outbuf) {
+ GST_ELEMENT_ERROR (dvdlpcmdec, RESOURCE, FAILED, (NULL),
+ ("Buffer allocation failed"));
+ gst_buffer_unref (buf);
+ return;
+ }
+ gst_buffer_stamp (outbuf, buf);
+
+ src = data;
+ dest = GST_BUFFER_DATA (outbuf);
+
+ /* Copy 20-bit LPCM format to 24-bit buffers, with 0x00 in the lowest
+ * nibble. Not that the first 2 bytes are already correct */
+ for (i = 0; i < count; i++) {
+ dest[0] = src[0];
+ dest[1] = src[1];
+ dest[2] = src[8] & 0xf0;
+ dest[3] = src[2];
+ dest[4] = src[3];
+ dest[5] = (src[8] & 0x0f) << 4;
+ dest[6] = src[4];
+ dest[7] = src[5];
+ dest[8] = src[9] & 0x0f;
+ dest[9] = src[6];
+ dest[10] = src[7];
+ dest[11] = (src[9] & 0x0f) << 4;
+
+ src += 10;
+ dest += 12;
+ }
+
+ gst_buffer_unref (buf);
+ dvdlpcmdec->offset += GST_BUFFER_SIZE (outbuf);
+ gst_pad_push (dvdlpcmdec->srcpad, GST_DATA (outbuf));
+ return;
+ }
+ case 24:
+ {
+ /* Rearrange 24-bit LPCM format in-place. Note that the first 2
+ * and last byte are already correct */
+ gint64 count = size / 12;
+ gint64 i;
+ guchar *src = data;
+
+ for (i = 0; i < count; i++) {
+ guchar temp[9];
+
+ temp[0] = src[8];
+ temp[1] = src[2];
+ temp[2] = src[3];
+ temp[3] = src[9];
+ temp[4] = src[4];
+ temp[5] = src[5];
+ temp[6] = src[10];
+ temp[7] = src[6];
+ temp[8] = src[7];
+
+ memcpy (src + 2, temp, 9);
+ src += 12;
+ }
+
+ dvdlpcmdec->offset += GST_BUFFER_SIZE (buf);
+ gst_pad_push (dvdlpcmdec->srcpad, GST_DATA (buf));
+ return;
+ }
+ default:
+ GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, WRONG_TYPE, (NULL),
+ ("Invalid sample width configured"));
+ }
+
+ gst_buffer_unref (buf);
+}
+
+static GstElementStateReturn
+gst_dvdlpcmdec_change_state (GstElement * element)
+{
+ GstDvdLpcmDec *dvdlpcmdec = GST_DVDLPCMDEC (element);
+
+ switch (GST_STATE_TRANSITION (element)) {
+ case GST_STATE_PAUSED_TO_READY:
+ gst_dvdlpcm_reset (dvdlpcmdec);
+ break;
+ default:
+ break;
+ }
+
+ if (parent_class->change_state)
+ return parent_class->change_state (element);
+
+ return GST_STATE_SUCCESS;
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ GST_DEBUG_CATEGORY_INIT (dvdlpcm_debug, "dvdlpcmdec", 0, "DVD LPCM Decoder");
+
+ if (!gst_element_register (plugin, "dvdlpcmdec", GST_RANK_PRIMARY,
+ GST_TYPE_DVDLPCMDEC)) {
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "dvdlpcmdec",
+ "Decode DVD LPCM frames into standard PCM",
+ plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)
diff --git a/gst/dvdlpcmdec/gstdvdlpcmdec.h b/gst/dvdlpcmdec/gstdvdlpcmdec.h
new file mode 100644
index 00000000..099e70f6
--- /dev/null
+++ b/gst/dvdlpcmdec/gstdvdlpcmdec.h
@@ -0,0 +1,66 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2005> Jan Schmidt <jan@noraisin.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_DVDLPCMDEC_H__
+#define __GST_DVDLPCMDEC_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_DVDLPCMDEC \
+ (gst_dvdlpcmdec_get_type())
+#define GST_DVDLPCMDEC(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DVDLPCMDEC,GstDvdLpcmDec))
+#define GST_DVDLPCMDEC_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DVDLPCMDEC,GstDvdLpcmDec))
+#define GST_IS_DVDLPCMDEC(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DVDLPCMDEC))
+#define GST_IS_DVDLPCMDEC_CLASS(obj) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DVDLPCMDEC))
+
+typedef struct _GstDvdLpcmDec GstDvdLpcmDec;
+typedef struct _GstDvdLpcmDecClass GstDvdLpcmDecClass;
+
+struct _GstDvdLpcmDec {
+ GstElement element;
+
+ GstPad *sinkpad,*srcpad;
+
+ guint rate;
+ guint channels;
+ guint width;
+ guint out_width;
+ guint dynamic_range;
+ guint emphasis;
+ guint mute;
+
+ guint64 offset;
+};
+
+struct _GstDvdLpcmDecClass {
+ GstElementClass parent_class;
+};
+
+GType gst_dvdlpcmdec_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_DVDLPCMDEC_H__ */
generated by cgit (git 2.34.1) at 2025-06-14 17:07:19 +0000