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Port LPCM decoder to 0.9

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Original commit message from CVS:
Port LPCM decoder to 0.9
This commit is contained in:
Michael Smith 2005-08-31 11:53:35 +00:00
parent 63a8a2d555
commit 9f0c73f484
5 changed files with 529 additions and 0 deletions
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10
ChangeLog
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@ -1,3 +1,13 @@
2005-08-31 Michael Smith <msmith@fluendo.com>
* configure.ac:
* gst/dvdlpcmdec/Makefile.am:
* gst/dvdlpcmdec/gstdvdlpcmdec.c: (gst_dvdlpcm_reset),
(gst_dvdlpcmdec_init), (gst_dvdlpcmdec_link), (update_timestamps),
(gst_dvdlpcmdec_chain):
* gst/dvdlpcmdec/gstdvdlpcmdec.h:
Port LPCM decoder to 0.9
2005-08-30 Jan Schmidt <thaytan@mad.scientist.com>
* configure.ac:

1
configure.ac
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@ -520,6 +520,7 @@ Makefile
gst-plugins.spec
gst/Makefile
gst/mpegaudioparse/Makefile
gst/dvdlpcmdec/Makefile
gst/qtdemux/Makefile
gst/realmedia/Makefile
gst/silence/Makefile

9
gst/dvdlpcmdec/Makefile.am Normal file
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@ -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

442
gst/dvdlpcmdec/gstdvdlpcmdec.c Normal file
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@ -0,0 +1,442 @@
/* 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"
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 ("audio/x-raw-int, "
"width = (int) { 16, 24 }, "
"rate = (int) { 48000, 96000 }, "
"channels = (int) [ 1, 8 ], "
"endianness = (int) { BIG_ENDIAN }, "
"depth = (int) { 16, 24 }, " "signed = (boolean) { true }")
);
/* 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 GstFlowReturn gst_dvdlpcmdec_chain (GstPad * pad, GstBuffer * buffer);
static GstPadLinkReturn gst_dvdlpcmdec_link (GstPad * pad, GstPad * peer);
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;
dvdlpcmdec->timestamp = 0;
GST_LOG_OBJECT (dvdlpcmdec, "Setting NULL caps on src pad");
gst_pad_set_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_element_add_pad (GST_ELEMENT (dvdlpcmdec), dvdlpcmdec->srcpad);
gst_dvdlpcm_reset (dvdlpcmdec);
}
static GstPadLinkReturn
gst_dvdlpcmdec_link (GstPad * pad, GstPad * peer)
{
GstStructure *structure;
gboolean res = TRUE;
GstDvdLpcmDec *dvdlpcmdec;
GstCaps *src_caps;
GstCaps *caps;
g_return_val_if_fail (peer != NULL, GST_PAD_LINK_REFUSED);
g_return_val_if_fail (pad != NULL, GST_PAD_LINK_REFUSED);
dvdlpcmdec = GST_DVDLPCMDEC (gst_pad_get_parent (pad));
caps = gst_pad_get_caps (peer);
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) {
GST_DEBUG_OBJECT (dvdlpcmdec, "Couldn't get parameters; missing caps?");
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 caps to set on the src pad, which we know from the incoming caps */
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_caps (dvdlpcmdec->srcpad, src_caps)) {
GST_DEBUG_OBJECT (dvdlpcmdec, "Failed to set caps!");
res = FALSE;
} else {
GST_DEBUG_OBJECT (dvdlpcmdec, "Successfully set caps: %" GST_PTR_FORMAT,
caps);
}
gst_caps_unref (src_caps);
if (!res)
return GST_PAD_LINK_REFUSED;
return GST_PAD_LINK_OK;
}
static void
update_timestamps (GstDvdLpcmDec * dvdlpcmdec, GstBuffer * buf, int samples)
{
GST_BUFFER_DURATION (buf) = samples * GST_SECOND / dvdlpcmdec->rate;
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
/* Then leave it as-is, and save this timestamp */
dvdlpcmdec->timestamp = GST_BUFFER_TIMESTAMP (buf);
} else {
dvdlpcmdec->timestamp += GST_BUFFER_DURATION (buf);
GST_BUFFER_TIMESTAMP (buf) = dvdlpcmdec->timestamp;
}
GST_LOG_OBJECT (dvdlpcmdec, "Updated timestamp to %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
}
static GstFlowReturn
gst_dvdlpcmdec_chain (GstPad * pad, GstBuffer * buf)
{
GstDvdLpcmDec *dvdlpcmdec;
gint64 size;
g_return_val_if_fail (pad != NULL, GST_FLOW_ERROR);
g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
g_return_val_if_fail (buf != NULL, GST_FLOW_ERROR);
dvdlpcmdec = GST_DVDLPCMDEC (gst_pad_get_parent (pad));
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 GST_FLOW_ERROR;
}
if (!GST_PAD_IS_USABLE (dvdlpcmdec->srcpad)) {
GST_DEBUG_OBJECT (dvdlpcmdec, "Discarding buffer on disabled pad");
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
/* 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, once we set
* appropriate things on the buffer */
int samples;
samples = size / dvdlpcmdec->channels / 2;
/* Set appropriate caps on it to pass downstream */
gst_buffer_set_caps (buf, GST_PAD_CAPS (dvdlpcmdec->srcpad));
update_timestamps (dvdlpcmdec, buf, samples);
dvdlpcmdec->offset += size;
gst_pad_push (dvdlpcmdec->srcpad, buf);
return GST_FLOW_OK;
}
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;
GstFlowReturn newbufret;
GstCaps *bufcaps = GST_PAD_CAPS (dvdlpcmdec->srcpad);
newbufret = gst_pad_alloc_buffer (dvdlpcmdec->srcpad, dvdlpcmdec->offset,
samples * 3, bufcaps, &outbuf);
if (newbufret != GST_FLOW_OK) {
GST_ELEMENT_ERROR (dvdlpcmdec, RESOURCE, FAILED, (NULL),
("Buffer allocation failed"));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
gst_buffer_stamp (outbuf, buf);
update_timestamps (dvdlpcmdec, buf, samples / dvdlpcmdec->channels);
src = GST_BUFFER_DATA (buf);
dest = GST_BUFFER_DATA (outbuf);
/* Copy 20-bit LPCM format to 24-bit buffers, with 0x00 in the lowest
* nibble. Note 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, outbuf);
return GST_FLOW_OK;
}
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;
int samples = size / dvdlpcmdec->channels / 3;
/* Ensure our output buffer is writable */
buf = gst_buffer_make_writable (buf);
/* And set appropriate caps on it */
gst_buffer_set_caps (buf, GST_PAD_CAPS (dvdlpcmdec->srcpad));
update_timestamps (dvdlpcmdec, buf, samples);
src = GST_BUFFER_DATA (buf);
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, buf);
return GST_FLOW_OK;
}
default:
GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, WRONG_TYPE, (NULL),
("Invalid sample width configured"));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
}
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)

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gst/dvdlpcmdec/gstdvdlpcmdec.h Normal file
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@ -0,0 +1,67 @@
/* 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;
gint rate;
gint channels;
gint width;
gint out_width;
gint dynamic_range;
gint emphasis;
gint mute;
guint64 offset;
GstClockTime timestamp;
};
struct _GstDvdLpcmDecClass {
GstElementClass parent_class;
};
GType gst_dvdlpcmdec_get_type (void);
G_END_DECLS
#endif /* __GST_DVDLPCMDEC_H__ */