mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-02 20:55:55 +00:00
adpcmdec: Add new plugin for ms-adpcm decoding.
This commit is contained in:
Michael Smith
parent
0444aa3374
commit
1a98c66f4a
2
common
2
common
|
|
@ -1 +1 @@
|
|||
Subproject commit 888e0a268b60904dd208b672a3c57f1ff7d9786c
|
||||
Subproject commit 6ab11d17cb8e4d1ed755da7accac9630d567a097
|
||||
|
|
@ -251,6 +251,7 @@ dnl *** plug-ins to include ***
|
|||
|
||||
dnl these are all the gst plug-ins, compilable without additional libs
|
||||
AG_GST_CHECK_PLUGIN(aacparse)
|
||||
AG_GST_CHECK_PLUGIN(adpcmdec)
|
||||
AG_GST_CHECK_PLUGIN(aiffparse)
|
||||
AG_GST_CHECK_PLUGIN(amrparse)
|
||||
AG_GST_CHECK_PLUGIN(autoconvert)
|
||||
|
|
@ -1560,6 +1561,7 @@ common/shave-libtool
|
|||
gst-plugins-bad.spec
|
||||
gst/Makefile
|
||||
gst/aacparse/Makefile
|
||||
gst/adpcmdec/Makefile
|
||||
gst/aiffparse/Makefile
|
||||
gst/amrparse/Makefile
|
||||
gst/autoconvert/Makefile
|
||||
|
|
|
|||
12
gst/adpcmdec/Makefile.am
Normal file
12
gst/adpcmdec/Makefile.am
Normal file
|
|
@ -0,0 +1,12 @@
|
|||
plugin_LTLIBRARIES = libgstadpcmdec.la
|
||||
|
||||
# sources used to compile this plug-in
|
||||
libgstadpcmdec_la_SOURCES = adpcmdec.c
|
||||
|
||||
# flags used to compile this plugin
|
||||
# add other _CFLAGS and _LIBS as needed
|
||||
libgstadpcmdec_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS)
|
||||
libgstadpcmdec_la_LIBADD = $(GST_LIBS) $(GST_BASE_LIBS)
|
||||
libgstadpcmdec_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
|
||||
libgstadpcmdec_la_LIBTOOLFLAGS = --tag=disable-static
|
||||
|
||||
452
gst/adpcmdec/adpcmdec.c
Normal file
452
gst/adpcmdec/adpcmdec.c
Normal file
|
|
@ -0,0 +1,452 @@
|
|||
/* GStreamer
|
||||
* Copyright (C) 2009 Pioneers of the Inevitable <songbird@songbirdnest.com>
|
||||
*
|
||||
* Authors: Michael Smith <msmith@songbirdnest.com>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
/* Based on MS-ADPCM decoder in libsndfile,
|
||||
Copyright (C) 1999-2002 Erik de Castro Lopo <erikd@zip.com.au
|
||||
*/
|
||||
|
||||
#ifdef HAVE_CONFIG_H
|
||||
#include "config.h"
|
||||
#endif
|
||||
|
||||
#include <gst/gst.h>
|
||||
#include <gst/base/gstadapter.h>
|
||||
|
||||
#define GST_TYPE_ADPCM_DEC \
|
||||
(adpcmdec_get_type ())
|
||||
|
||||
#define GST_ADPCM_DEC(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_ADPCM_DEC, ADPCMDec))
|
||||
|
||||
#define GST_CAT_DEFAULT adpcmdec_debug
|
||||
GST_DEBUG_CATEGORY_STATIC (adpcmdec_debug);
|
||||
|
||||
static const GstElementDetails adpcmdec_details =
|
||||
GST_ELEMENT_DETAILS ("MS-ADPCM decoder",
|
||||
"Codec/Decoder/Audio",
|
||||
"Decode MS AD-PCM audio",
|
||||
"Pioneers of the Inevitable <songbird@songbirdnest.com");
|
||||
|
||||
static GstStaticPadTemplate adpcmdec_sink_template =
|
||||
GST_STATIC_PAD_TEMPLATE ("sink",
|
||||
GST_PAD_SINK,
|
||||
GST_PAD_ALWAYS,
|
||||
GST_STATIC_CAPS ("audio/x-adpcm, "
|
||||
"layout=(string)microsoft, "
|
||||
"block_align = (int) [64, 8096], "
|
||||
"rate = (int)[ 1, MAX ], " "channels = (int)[1,2]")
|
||||
);
|
||||
|
||||
static GstStaticPadTemplate adpcmdec_src_template =
|
||||
GST_STATIC_PAD_TEMPLATE ("src",
|
||||
GST_PAD_SRC,
|
||||
GST_PAD_ALWAYS,
|
||||
GST_STATIC_CAPS ("audio/x-raw-int, "
|
||||
"depth = (int)16, "
|
||||
"width = (int)16, "
|
||||
"endianness = (int)" G_STRINGIFY (G_BYTE_ORDER) ", "
|
||||
"signed = (boolean)TRUE, "
|
||||
"channels = (int) [1,2], " "rate = (int)[1, MAX]")
|
||||
);
|
||||
|
||||
typedef struct _ADPCMDecClass
|
||||
{
|
||||
GstElementClass parent_class;
|
||||
} ADPCMDecClass;
|
||||
|
||||
typedef struct _ADPCMDec
|
||||
{
|
||||
GstElement parent;
|
||||
|
||||
GstPad *sinkpad;
|
||||
GstPad *srcpad;
|
||||
|
||||
GstCaps *output_caps;
|
||||
|
||||
int rate;
|
||||
int channels;
|
||||
int blocksize;
|
||||
|
||||
gboolean is_setup;
|
||||
|
||||
GstClockTime timestamp;
|
||||
|
||||
guint64 out_samples;
|
||||
|
||||
GstAdapter *adapter;
|
||||
|
||||
} ADPCMDec;
|
||||
|
||||
GST_BOILERPLATE (ADPCMDec, adpcmdec, GstElement, GST_TYPE_ELEMENT);
|
||||
static gboolean
|
||||
adpcmdec_setup (ADPCMDec * dec)
|
||||
{
|
||||
dec->output_caps = gst_caps_new_simple ("audio/x-raw-int",
|
||||
"rate", G_TYPE_INT, dec->rate,
|
||||
"channels", G_TYPE_INT, dec->channels,
|
||||
"width", G_TYPE_INT, 16,
|
||||
"depth", G_TYPE_INT, 16,
|
||||
"endianness", G_TYPE_INT, G_BYTE_ORDER,
|
||||
"signed", G_TYPE_BOOLEAN, TRUE, NULL);
|
||||
|
||||
if (dec->output_caps) {
|
||||
gst_pad_set_caps (dec->srcpad, dec->output_caps);
|
||||
}
|
||||
|
||||
dec->is_setup = TRUE;
|
||||
dec->timestamp = GST_CLOCK_TIME_NONE;
|
||||
dec->adapter = gst_adapter_new ();
|
||||
dec->out_samples = 0;
|
||||
|
||||
return gst_pad_push_event (dec->srcpad, gst_event_new_new_segment (FALSE,
|
||||
1.0, GST_FORMAT_TIME, 0, -1, 0));
|
||||
}
|
||||
|
||||
static void
|
||||
adpcmdec_teardown (ADPCMDec * dec)
|
||||
{
|
||||
if (dec->output_caps) {
|
||||
gst_caps_unref (dec->output_caps);
|
||||
dec->output_caps = NULL;
|
||||
}
|
||||
if (dec->adapter) {
|
||||
g_object_unref (dec->adapter);
|
||||
dec->adapter = NULL;
|
||||
}
|
||||
dec->is_setup = FALSE;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
adpcmdec_sink_setcaps (GstPad * pad, GstCaps * caps)
|
||||
{
|
||||
ADPCMDec *dec = (ADPCMDec *) gst_pad_get_parent (pad);
|
||||
GstStructure *structure = gst_caps_get_structure (caps, 0);
|
||||
|
||||
if (!gst_structure_get_int (structure, "block_align", &dec->blocksize))
|
||||
return FALSE;
|
||||
if (!gst_structure_get_int (structure, "rate", &dec->rate))
|
||||
return FALSE;
|
||||
if (!gst_structure_get_int (structure, "channels", &dec->channels))
|
||||
return FALSE;
|
||||
|
||||
if (dec->is_setup)
|
||||
adpcmdec_teardown (dec);
|
||||
gst_object_unref (dec);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
|
||||
/*=====================================================================
|
||||
* From libsndfile:
|
||||
*
|
||||
* MS ADPCM Block Layout.
|
||||
* ======================
|
||||
* Block is usually 256, 512 or 1024 bytes depending on sample rate.
|
||||
* For a mono file, the block is laid out as follows:
|
||||
* byte purpose
|
||||
* 0 block predictor [0..6]
|
||||
* 1,2 initial idelta (positive)
|
||||
* 3,4 sample 1
|
||||
* 5,6 sample 0
|
||||
* 7..n packed bytecodes
|
||||
*
|
||||
* For a stereo file, the block is laid out as follows:
|
||||
* byte purpose
|
||||
* 0 block predictor [0..6] for left channel
|
||||
* 1 block predictor [0..6] for right channel
|
||||
* 2,3 initial idelta (positive) for left channel
|
||||
* 4,5 initial idelta (positive) for right channel
|
||||
* 6,7 sample 1 for left channel
|
||||
* 8,9 sample 1 for right channel
|
||||
* 10,11 sample 0 for left channel
|
||||
* 12,13 sample 0 for right channel
|
||||
* 14..n packed bytecodes
|
||||
*
|
||||
*=====================================================================
|
||||
*/
|
||||
static int AdaptationTable[] = {
|
||||
230, 230, 230, 230, 307, 409, 512, 614,
|
||||
768, 614, 512, 409, 307, 230, 230, 230
|
||||
};
|
||||
|
||||
static int AdaptCoeff1[] = {
|
||||
256, 512, 0, 192, 240, 460, 392
|
||||
};
|
||||
|
||||
static int AdaptCoeff2[] = {
|
||||
0, -256, 0, 64, 0, -208, -232
|
||||
};
|
||||
|
||||
static gint16
|
||||
read_sample (guint8 * data)
|
||||
{
|
||||
guint16 val = data[0] | (data[1] << 8);
|
||||
return *((gint16 *) & val);
|
||||
}
|
||||
|
||||
/* Decode a single block of data from 'data', storing 'n_samples' decoded 16 bit
|
||||
samples in 'samples'.
|
||||
|
||||
All buffer lengths have been verified by the caller
|
||||
*/
|
||||
static gboolean
|
||||
adpcmdec_decode_ms_block (ADPCMDec * dec, int n_samples, guint8 * data,
|
||||
gint16 * samples)
|
||||
{
|
||||
gint16 pred[2];
|
||||
gint16 idelta[2];
|
||||
int idx; /* Current byte offset in 'data' */
|
||||
int i; /* Current sample index in 'samples' */
|
||||
|
||||
/* Read the block header, verify for sanity */
|
||||
if (dec->channels == 1) {
|
||||
pred[0] = data[0];
|
||||
idelta[0] = read_sample (data + 1);
|
||||
samples[1] = read_sample (data + 3);
|
||||
samples[0] = read_sample (data + 5);
|
||||
idx = 7;
|
||||
i = 2;
|
||||
if (pred[0] < 0 || pred[0] > 6) {
|
||||
GST_WARNING_OBJECT (dec, "Invalid block predictor");
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
|
||||
else {
|
||||
pred[0] = data[0];
|
||||
pred[1] = data[1];
|
||||
idelta[0] = read_sample (data + 2);
|
||||
idelta[1] = read_sample (data + 4);
|
||||
samples[2] = read_sample (data + 6);
|
||||
samples[3] = read_sample (data + 8);
|
||||
samples[0] = read_sample (data + 10);
|
||||
samples[1] = read_sample (data + 12);
|
||||
idx = 14;
|
||||
i = 4;
|
||||
if (pred[0] < 0 || pred[0] > 6 || pred[1] < 0 || pred[1] > 6) {
|
||||
GST_WARNING_OBJECT (dec, "Invalid block predictor");
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
for (; i < n_samples; i++) {
|
||||
int chan = i % dec->channels;
|
||||
int bytecode;
|
||||
int delta;
|
||||
int current;
|
||||
int predict;
|
||||
if (i % 2 == 0) {
|
||||
bytecode = (data[idx] >> 4) & 0x0F;
|
||||
} else {
|
||||
bytecode = data[idx] & 0x0F;
|
||||
idx++;
|
||||
}
|
||||
|
||||
delta = idelta[chan];
|
||||
idelta[chan] = (AdaptationTable[bytecode] * delta) >> 8;
|
||||
if (idelta[chan] < 16)
|
||||
idelta[chan] = 16;
|
||||
|
||||
/* Bytecode is used above as an index into the table. Below, it's used
|
||||
as a signed 4-bit value; convert appropriately */
|
||||
if (bytecode & 0x8)
|
||||
bytecode -= 0x10;
|
||||
|
||||
predict = ((samples[i - dec->channels] * AdaptCoeff1[pred[chan]]) +
|
||||
(samples[i - 2 * dec->channels] * AdaptCoeff2[pred[chan]])
|
||||
) >> 8;
|
||||
|
||||
current = (bytecode * delta) + predict;
|
||||
|
||||
/* Clamp to 16 bits, store decoded sample */
|
||||
samples[i] = CLAMP (current, G_MININT16, G_MAXINT16);
|
||||
}
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static GstFlowReturn
|
||||
adpcmdec_chain (GstPad * pad, GstBuffer * buf)
|
||||
{
|
||||
ADPCMDec *dec = (ADPCMDec *) gst_pad_get_parent (pad);
|
||||
GstFlowReturn ret = GST_FLOW_OK;
|
||||
guint8 *data;
|
||||
GstBuffer *outbuf = NULL;
|
||||
GstBuffer *databuf = NULL;
|
||||
int outsize;
|
||||
int samples;
|
||||
gboolean res;
|
||||
|
||||
if (!dec->is_setup)
|
||||
adpcmdec_setup (dec);
|
||||
|
||||
if (dec->timestamp == GST_CLOCK_TIME_NONE)
|
||||
dec->timestamp = GST_BUFFER_TIMESTAMP (buf);
|
||||
|
||||
gst_adapter_push (dec->adapter, buf);
|
||||
|
||||
while (gst_adapter_available (dec->adapter) >= dec->blocksize) {
|
||||
databuf = gst_adapter_take_buffer (dec->adapter, dec->blocksize);
|
||||
data = GST_BUFFER_DATA (databuf);
|
||||
|
||||
/* Each block has a 3 byte header per channel, plus 4 bytes per channel to
|
||||
give two initial sample values per channel. Then the remainder gives
|
||||
two samples per byte */
|
||||
samples = (dec->blocksize - 7 * dec->channels) * 2 + 2 * dec->channels;
|
||||
outsize = 2 * samples;
|
||||
outbuf = gst_buffer_new_and_alloc (outsize);
|
||||
|
||||
res = adpcmdec_decode_ms_block (dec, samples, data,
|
||||
(gint16 *) (GST_BUFFER_DATA (outbuf)));
|
||||
|
||||
/* Done with input data, free it */
|
||||
gst_buffer_unref (databuf);
|
||||
|
||||
if (!res) {
|
||||
gst_buffer_unref (outbuf);
|
||||
GST_WARNING_OBJECT (dec, "Decode of block failed");
|
||||
ret = GST_FLOW_ERROR;
|
||||
goto done;
|
||||
}
|
||||
|
||||
gst_buffer_set_caps (outbuf, dec->output_caps);
|
||||
GST_BUFFER_TIMESTAMP (outbuf) = dec->timestamp;
|
||||
dec->out_samples += samples / dec->channels;
|
||||
dec->timestamp =
|
||||
gst_util_uint64_scale_int (dec->out_samples, GST_SECOND, dec->rate);
|
||||
GST_BUFFER_DURATION (outbuf) =
|
||||
dec->timestamp - GST_BUFFER_TIMESTAMP (outbuf);
|
||||
|
||||
ret = gst_pad_push (dec->srcpad, outbuf);
|
||||
if (ret != GST_FLOW_OK)
|
||||
goto done;
|
||||
}
|
||||
|
||||
done:
|
||||
gst_object_unref (dec);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
adpcmdec_sink_event (GstPad * pad, GstEvent * event)
|
||||
{
|
||||
ADPCMDec *dec = (ADPCMDec *) gst_pad_get_parent (pad);
|
||||
gboolean res;
|
||||
switch (GST_EVENT_TYPE (event)) {
|
||||
case GST_EVENT_FLUSH_STOP:
|
||||
gst_adapter_clear (dec->adapter);
|
||||
/* Fall through */
|
||||
default:
|
||||
res = gst_pad_push_event (dec->srcpad, event);
|
||||
break;
|
||||
}
|
||||
gst_object_unref (dec);
|
||||
return res;
|
||||
}
|
||||
|
||||
static GstStateChangeReturn
|
||||
adpcmdec_change_state (GstElement * element, GstStateChange transition)
|
||||
{
|
||||
GstStateChangeReturn ret;
|
||||
ADPCMDec *dec = (ADPCMDec *) element;
|
||||
|
||||
switch (transition) {
|
||||
case GST_STATE_CHANGE_NULL_TO_READY:
|
||||
break;
|
||||
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
||||
break;
|
||||
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
||||
|
||||
switch (transition) {
|
||||
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
||||
break;
|
||||
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
||||
adpcmdec_teardown (dec);
|
||||
break;
|
||||
case GST_STATE_CHANGE_READY_TO_NULL:
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void
|
||||
adpcmdec_dispose (GObject * obj)
|
||||
{
|
||||
G_OBJECT_CLASS (parent_class)->dispose (obj);
|
||||
}
|
||||
|
||||
static void
|
||||
adpcmdec_init (ADPCMDec * dec, ADPCMDecClass * klass)
|
||||
{
|
||||
dec->sinkpad =
|
||||
gst_pad_new_from_static_template (&adpcmdec_sink_template, "sink");
|
||||
gst_pad_set_setcaps_function (dec->sinkpad,
|
||||
GST_DEBUG_FUNCPTR (adpcmdec_sink_setcaps));
|
||||
gst_pad_set_chain_function (dec->sinkpad, GST_DEBUG_FUNCPTR (adpcmdec_chain));
|
||||
gst_pad_set_event_function (dec->sinkpad,
|
||||
GST_DEBUG_FUNCPTR (adpcmdec_sink_event));
|
||||
gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
|
||||
dec->srcpad =
|
||||
gst_pad_new_from_static_template (&adpcmdec_src_template, "src");
|
||||
gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
|
||||
}
|
||||
|
||||
static void
|
||||
adpcmdec_class_init (ADPCMDecClass * klass)
|
||||
{
|
||||
GObjectClass *gobjectclass = (GObjectClass *) klass;
|
||||
GstElementClass *gstelement_class = (GstElementClass *) klass;
|
||||
gobjectclass->dispose = adpcmdec_dispose;
|
||||
gstelement_class->change_state = adpcmdec_change_state;
|
||||
} static void
|
||||
|
||||
adpcmdec_base_init (gpointer klass)
|
||||
{
|
||||
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
||||
gst_element_class_add_pad_template (element_class,
|
||||
gst_static_pad_template_get (&adpcmdec_sink_template));
|
||||
gst_element_class_add_pad_template (element_class,
|
||||
gst_static_pad_template_get (&adpcmdec_src_template));
|
||||
gst_element_class_set_details (element_class, &adpcmdec_details);
|
||||
}
|
||||
|
||||
static gboolean
|
||||
plugin_init (GstPlugin * plugin)
|
||||
{
|
||||
GST_DEBUG_CATEGORY_INIT (adpcmdec_debug, "adpcmdec", 0, "ADPCM Decoders");
|
||||
if (!gst_element_register (plugin, "msadpcmdec", GST_RANK_PRIMARY,
|
||||
GST_TYPE_ADPCM_DEC)) {
|
||||
return FALSE;
|
||||
}
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "adpcmdec",
|
||||
"ADPCM decoder", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,
|
||||
GST_PACKAGE_ORIGIN);
|
||||
Loading…
Reference in a new issue