mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-23 10:11:08 +00:00
adpcmenc: add new adpcm encoder element.
This commit is contained in:
Peter van Hardenberg
Michael Smith
parent
2dec1de420
commit
4aded03c5e
4 changed files with 586 additions and 0 deletions
|
|
@ -254,6 +254,7 @@ dnl *** plug-ins to include ***
|
|||
|
||||
dnl these are all the gst plug-ins, compilable without additional libs
|
||||
AG_GST_CHECK_PLUGIN(adpcmdec)
|
||||
AG_GST_CHECK_PLUGIN(adpcmenc)
|
||||
AG_GST_CHECK_PLUGIN(aiff)
|
||||
AG_GST_CHECK_PLUGIN(asfmux)
|
||||
AG_GST_CHECK_PLUGIN(audioparsers)
|
||||
|
|
@ -1632,6 +1633,7 @@ common/m4/Makefile
|
|||
gst-plugins-bad.spec
|
||||
gst/Makefile
|
||||
gst/adpcmdec/Makefile
|
||||
gst/adpcmenc/Makefile
|
||||
gst/aiff/Makefile
|
||||
gst/asfmux/Makefile
|
||||
gst/audioparsers/Makefile
|
||||
|
|
|
|||
|
|
@ -121,6 +121,7 @@ rm -rf $RPM_BUILD_ROOT
|
|||
%{_libdir}/gstreamer-%{majorminor}/libgstrtpmux.so
|
||||
%{_libdir}/gstreamer-%{majorminor}/libgstsiren.so
|
||||
%{_libdir}/gstreamer-%{majorminor}/libgstadpcmdec.so
|
||||
%{_libdir}/gstreamer-%{majorminor}/libgstadpcmenc.so
|
||||
%{_libdir}/gstreamer-%{majorminor}/libgstid3tag.so
|
||||
%{_libdir}/gstreamer-%{majorminor}/libgsthdvparse.so
|
||||
%{_libdir}/gstreamer-%{majorminor}/libgstshapewipe.so
|
||||
|
|
|
|||
12
gst/adpcmenc/Makefile.am
Normal file
12
gst/adpcmenc/Makefile.am
Normal file
|
|
@ -0,0 +1,12 @@
|
|||
plugin_LTLIBRARIES = libgstadpcmenc.la
|
||||
|
||||
# sources used to compile this plug-in
|
||||
libgstadpcmenc_la_SOURCES = adpcmenc.c
|
||||
|
||||
# flags used to compile this plugin
|
||||
# add other _CFLAGS and _LIBS as needed
|
||||
libgstadpcmenc_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS)
|
||||
libgstadpcmenc_la_LIBADD = $(GST_LIBS) $(GST_BASE_LIBS)
|
||||
libgstadpcmenc_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
|
||||
libgstadpcmenc_la_LIBTOOLFLAGS = --tag=disable-static
|
||||
|
||||
571
gst/adpcmenc/adpcmenc.c
Normal file
571
gst/adpcmenc/adpcmenc.c
Normal file
|
|
@ -0,0 +1,571 @@
|
|||
/* GStreamer
|
||||
* Copyright (C) 2009 Pioneers of the Inevitable <songbird@songbirdnest.com>
|
||||
*
|
||||
* Authors: Peter van Hardenberg <pvh@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 ADPCM encoders 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_ENC \
|
||||
(adpcmenc_get_type ())
|
||||
|
||||
#define GST_TYPE_ADPCMENC_LAYOUT \
|
||||
(adpcmenc_layout_get_type ())
|
||||
|
||||
#define GST_ADPCM_ENC(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_ADPCM_ENC, ADPCMEnc))
|
||||
|
||||
#define GST_CAT_DEFAULT adpcmenc_debug
|
||||
GST_DEBUG_CATEGORY_STATIC (adpcmenc_debug);
|
||||
|
||||
static const GstElementDetails adpcmenc_details =
|
||||
GST_ELEMENT_DETAILS ("ADPCM encoder",
|
||||
"Codec/Encoder/Audio",
|
||||
"Encode ADPCM audio",
|
||||
"Pioneers of the Inevitable <songbird@songbirdnest.com");
|
||||
|
||||
static GstStaticPadTemplate adpcmenc_sink_template =
|
||||
GST_STATIC_PAD_TEMPLATE ("sink",
|
||||
GST_PAD_SINK,
|
||||
GST_PAD_ALWAYS,
|
||||
GST_STATIC_CAPS ("audio/x-raw-int, "
|
||||
"depth = (int)16, "
|
||||
"width = (int)16, " "channels = (int) [1,2], " "rate = (int)[1, MAX]")
|
||||
);
|
||||
|
||||
static GstStaticPadTemplate adpcmenc_src_template =
|
||||
GST_STATIC_PAD_TEMPLATE ("src",
|
||||
GST_PAD_SRC,
|
||||
GST_PAD_ALWAYS,
|
||||
GST_STATIC_CAPS ("audio/x-adpcm, "
|
||||
" layout=(string){dvi}, "
|
||||
" block_align = (int) [64, 8192], "
|
||||
" rate = (int)[ 1, MAX ], " "channels = (int)[1,2];")
|
||||
);
|
||||
|
||||
#define MIN_ADPCM_BLOCK_SIZE 64
|
||||
#define MAX_ADPCM_BLOCK_SIZE 8192
|
||||
#define DEFAULT_ADPCM_BLOCK_SIZE 1024
|
||||
#define DEFAULT_ADPCM_LAYOUT LAYOUT_ADPCM_DVI
|
||||
|
||||
static int ima_indx_adjust[16] = {
|
||||
-1, -1, -1, -1, 2, 4, 6, 8, -1, -1, -1, -1, 2, 4, 6, 8,
|
||||
};
|
||||
|
||||
static int ima_step_size[89] = {
|
||||
7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
|
||||
50, 55, 60, 66, 73, 80, 88, 97, 107, 118, 130, 143, 157, 173, 190, 209, 230,
|
||||
253, 279, 307, 337, 371, 408, 449, 494, 544, 598, 658, 724, 796, 876, 963,
|
||||
1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066, 2272, 2499, 2749, 3024, 3327,
|
||||
3660, 4026, 4428, 4871, 5358, 5894, 6484, 7132, 7845, 8630, 9493, 10442,
|
||||
11487, 12635, 13899, 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794,
|
||||
32767
|
||||
};
|
||||
|
||||
|
||||
enum adpcm_properties
|
||||
{
|
||||
ARG_0,
|
||||
ARG_BLOCK_SIZE,
|
||||
ARG_LAYOUT
|
||||
};
|
||||
|
||||
enum adpcm_layout
|
||||
{
|
||||
LAYOUT_ADPCM_DVI
|
||||
};
|
||||
|
||||
static GType
|
||||
adpcmenc_layout_get_type (void)
|
||||
{
|
||||
static GType adpcmenc_layout_type = 0;
|
||||
|
||||
if (!adpcmenc_layout_type) {
|
||||
static GEnumValue layout_types[] = {
|
||||
{LAYOUT_ADPCM_DVI, "DVI/IMA APDCM", "dvi"},
|
||||
{0, NULL, NULL},
|
||||
};
|
||||
|
||||
adpcmenc_layout_type = g_enum_register_static ("GstADPCMEncLayout",
|
||||
layout_types);
|
||||
}
|
||||
|
||||
return adpcmenc_layout_type;
|
||||
}
|
||||
|
||||
typedef struct _ADPCMEncClass
|
||||
{
|
||||
GstElementClass parent_class;
|
||||
} ADPCMEncClass;
|
||||
|
||||
typedef struct _ADPCMEnc
|
||||
{
|
||||
GstElement parent;
|
||||
|
||||
GstPad *sinkpad;
|
||||
GstPad *srcpad;
|
||||
|
||||
GstCaps *output_caps;
|
||||
|
||||
enum adpcm_layout layout;
|
||||
int rate;
|
||||
int channels;
|
||||
int blocksize;
|
||||
int samples_per_block;
|
||||
|
||||
guint8 step_index[2];
|
||||
|
||||
gboolean is_setup;
|
||||
|
||||
GstClockTime timestamp;
|
||||
GstClockTime base_timestamp;
|
||||
|
||||
guint64 out_samples;
|
||||
|
||||
GstAdapter *adapter;
|
||||
|
||||
} ADPCMEnc;
|
||||
|
||||
GST_BOILERPLATE (ADPCMEnc, adpcmenc, GstElement, GST_TYPE_ELEMENT);
|
||||
static gboolean
|
||||
adpcmenc_setup (ADPCMEnc * enc)
|
||||
{
|
||||
const int DVI_IMA_HEADER_SIZE = 4;
|
||||
const int ADPCM_SAMPLES_PER_BYTE = 2;
|
||||
guint64 sample_bytes;
|
||||
|
||||
char *layout;
|
||||
switch (enc->layout) {
|
||||
case LAYOUT_ADPCM_DVI:
|
||||
layout = "dvi";
|
||||
/* IMA ADPCM includes a 4-byte header per channel, */
|
||||
sample_bytes = enc->blocksize - (DVI_IMA_HEADER_SIZE * enc->channels);
|
||||
/* two samples per byte, plus a single sample in the header. */
|
||||
enc->samples_per_block =
|
||||
((sample_bytes * ADPCM_SAMPLES_PER_BYTE) / enc->channels) + 1;
|
||||
break;
|
||||
default:
|
||||
GST_WARNING_OBJECT (enc, "Invalid layout");
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
enc->output_caps = gst_caps_new_simple ("audio/x-adpcm",
|
||||
"rate", G_TYPE_INT, enc->rate,
|
||||
"channels", G_TYPE_INT, enc->channels,
|
||||
"layout", G_TYPE_STRING, layout,
|
||||
"block_align", G_TYPE_INT, enc->blocksize, NULL);
|
||||
|
||||
if (enc->output_caps) {
|
||||
gst_pad_set_caps (enc->srcpad, enc->output_caps);
|
||||
}
|
||||
|
||||
enc->is_setup = TRUE;
|
||||
enc->timestamp = GST_CLOCK_TIME_NONE;
|
||||
enc->base_timestamp = GST_CLOCK_TIME_NONE;
|
||||
enc->adapter = gst_adapter_new ();
|
||||
enc->out_samples = 0;
|
||||
|
||||
/* Step index state is carried between blocks. */
|
||||
enc->step_index[0] = 0;
|
||||
enc->step_index[1] = 0;
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static void
|
||||
adpcmenc_teardown (ADPCMEnc * enc)
|
||||
{
|
||||
if (enc->output_caps) {
|
||||
gst_caps_unref (enc->output_caps);
|
||||
enc->output_caps = NULL;
|
||||
}
|
||||
if (enc->adapter) {
|
||||
g_object_unref (enc->adapter);
|
||||
enc->adapter = NULL;
|
||||
}
|
||||
enc->is_setup = FALSE;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
adpcmenc_sink_setcaps (GstPad * pad, GstCaps * caps)
|
||||
{
|
||||
ADPCMEnc *enc = (ADPCMEnc *) gst_pad_get_parent (pad);
|
||||
GstStructure *structure = gst_caps_get_structure (caps, 0);
|
||||
|
||||
if (!gst_structure_get_int (structure, "rate", &enc->rate))
|
||||
return FALSE;
|
||||
if (!gst_structure_get_int (structure, "channels", &enc->channels))
|
||||
return FALSE;
|
||||
|
||||
if (enc->is_setup) {
|
||||
adpcmenc_teardown (enc);
|
||||
}
|
||||
adpcmenc_setup (enc);
|
||||
|
||||
gst_object_unref (enc);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static void
|
||||
adpcmenc_set_property (GObject * object,
|
||||
guint prop_id, const GValue * value, GParamSpec * pspec)
|
||||
{
|
||||
ADPCMEnc *enc = GST_ADPCM_ENC (object);
|
||||
|
||||
switch (prop_id) {
|
||||
case ARG_BLOCK_SIZE:
|
||||
enc->blocksize = g_value_get_int (value);
|
||||
break;
|
||||
case ARG_LAYOUT:
|
||||
enc->layout = g_value_get_enum (value);
|
||||
break;
|
||||
default:
|
||||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
adpcmenc_get_property (GObject * object,
|
||||
guint prop_id, GValue * value, GParamSpec * pspec)
|
||||
{
|
||||
ADPCMEnc *enc = GST_ADPCM_ENC (object);
|
||||
|
||||
switch (prop_id) {
|
||||
case ARG_BLOCK_SIZE:
|
||||
g_value_set_int (value, enc->blocksize);
|
||||
break;
|
||||
case ARG_LAYOUT:
|
||||
g_value_set_enum (value, enc->layout);
|
||||
break;
|
||||
default:
|
||||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static guint8
|
||||
adpcmenc_encode_ima_sample (gint16 sample, gint16 * prev_sample,
|
||||
guint8 * stepindex)
|
||||
{
|
||||
const int NEGATIVE_SIGN_BIT = 0x8;
|
||||
int diff, vpdiff, mask, step;
|
||||
int bytecode = 0x0;
|
||||
diff = sample - *prev_sample;
|
||||
step = ima_step_size[*stepindex];
|
||||
vpdiff = step >> 3;
|
||||
|
||||
if (diff < 0) {
|
||||
diff = -diff;
|
||||
bytecode = NEGATIVE_SIGN_BIT;
|
||||
}
|
||||
|
||||
mask = 0x4;
|
||||
while (mask > 0) {
|
||||
if (diff >= step) {
|
||||
bytecode |= mask;
|
||||
diff -= step;
|
||||
vpdiff += step;
|
||||
}
|
||||
step >>= 1;
|
||||
mask >>= 1;
|
||||
}
|
||||
|
||||
if (bytecode & 8) {
|
||||
vpdiff = -vpdiff;
|
||||
}
|
||||
|
||||
*prev_sample = CLAMP (*prev_sample + vpdiff, G_MININT16, G_MAXINT16);
|
||||
*stepindex = CLAMP (*stepindex + ima_indx_adjust[bytecode], 0, 88);
|
||||
|
||||
return bytecode;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
adpcmenc_encode_ima_block (ADPCMEnc * enc, gint16 * samples, guint8 * outbuf)
|
||||
{
|
||||
const int HEADER_SIZE = 4;
|
||||
gint16 prev_sample[2] = { 0, 0 };
|
||||
guint32 write_pos = 0;
|
||||
guint32 read_pos = 0;
|
||||
guint8 channel = 0;
|
||||
|
||||
/* Write a header for each channel.
|
||||
* The header consists of a sixteen-bit predicted sound value,
|
||||
* and an eight bit step_index, carried forward from any previous block.
|
||||
* These allow seeking within the file.
|
||||
*/
|
||||
for (channel = 0; channel < enc->channels; channel++) {
|
||||
write_pos = channel * HEADER_SIZE;
|
||||
outbuf[write_pos + 0] = (samples[channel] & 0xFF);
|
||||
outbuf[write_pos + 1] = (samples[channel] >> 8) & 0xFF;
|
||||
outbuf[write_pos + 2] = enc->step_index[channel];
|
||||
outbuf[write_pos + 3] = 0;
|
||||
prev_sample[channel] = samples[channel];
|
||||
}
|
||||
|
||||
/* raw-audio looks like this for a stereo stream:
|
||||
* [ L, R, L, R, L, R ... ]
|
||||
* encoded audio is in eight-sample blocks, two samples to a byte thusly:
|
||||
* [ LL, LL, LL, LL, RR, RR, RR, RR ... ]
|
||||
*/
|
||||
write_pos = HEADER_SIZE * enc->channels;
|
||||
read_pos = enc->channels; /* the first sample is in the header. */
|
||||
while (write_pos < enc->blocksize) {
|
||||
gint8 CHANNEL_CHUNK_SIZE = 8;
|
||||
for (channel = 0; channel < enc->channels; channel++) {
|
||||
/* convert eight samples (four bytes) per channel, then swap */
|
||||
guint32 channel_chunk_base = read_pos + channel;
|
||||
gint8 chunk;
|
||||
for (chunk = 0; chunk < CHANNEL_CHUNK_SIZE; chunk++) {
|
||||
guint8 packed_byte = 0, encoded_sample;
|
||||
encoded_sample =
|
||||
adpcmenc_encode_ima_sample (samples[channel_chunk_base +
|
||||
(chunk * enc->channels)], &prev_sample[channel],
|
||||
&enc->step_index[channel]);
|
||||
packed_byte |= encoded_sample & 0x0F;
|
||||
|
||||
chunk++;
|
||||
|
||||
encoded_sample =
|
||||
adpcmenc_encode_ima_sample (samples[channel_chunk_base +
|
||||
(chunk * enc->channels)], &prev_sample[channel],
|
||||
&enc->step_index[channel]);
|
||||
packed_byte |= encoded_sample << 4 & 0xF0;
|
||||
|
||||
outbuf[write_pos++] = packed_byte;
|
||||
}
|
||||
}
|
||||
/* advance to the next block of 8 samples per channel */
|
||||
read_pos += CHANNEL_CHUNK_SIZE * enc->channels;
|
||||
if (read_pos > enc->samples_per_block * enc->channels) {
|
||||
GST_LOG ("Ran past the end. (Reading %i of %i.)", read_pos,
|
||||
enc->samples_per_block);
|
||||
}
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static GstFlowReturn
|
||||
adpcmenc_encode_block (ADPCMEnc * enc, gint16 * samples, int blocksize)
|
||||
{
|
||||
gboolean res;
|
||||
GstBuffer *outbuf = NULL;
|
||||
|
||||
if (enc->layout == LAYOUT_ADPCM_DVI) {
|
||||
outbuf = gst_buffer_new_and_alloc (enc->blocksize);
|
||||
res = adpcmenc_encode_ima_block (enc, samples, GST_BUFFER_DATA (outbuf));
|
||||
} else {
|
||||
GST_WARNING_OBJECT (enc, "Unknown layout");
|
||||
return GST_FLOW_ERROR;
|
||||
}
|
||||
|
||||
if (!res) {
|
||||
gst_buffer_unref (outbuf);
|
||||
GST_WARNING_OBJECT (enc, "Encode of block failed");
|
||||
return GST_FLOW_ERROR;
|
||||
}
|
||||
|
||||
gst_buffer_set_caps (outbuf, enc->output_caps);
|
||||
GST_BUFFER_TIMESTAMP (outbuf) = enc->timestamp;
|
||||
|
||||
enc->out_samples += enc->samples_per_block;
|
||||
enc->timestamp = enc->base_timestamp +
|
||||
gst_util_uint64_scale_int (enc->out_samples, GST_SECOND, enc->rate);
|
||||
GST_BUFFER_DURATION (outbuf) = enc->timestamp - GST_BUFFER_TIMESTAMP (outbuf);
|
||||
|
||||
return gst_pad_push (enc->srcpad, outbuf);
|
||||
}
|
||||
|
||||
static GstFlowReturn
|
||||
adpcmenc_chain (GstPad * pad, GstBuffer * buf)
|
||||
{
|
||||
ADPCMEnc *enc = (ADPCMEnc *) gst_pad_get_parent (pad);
|
||||
GstFlowReturn ret = GST_FLOW_OK;
|
||||
gint16 *samples;
|
||||
GstBuffer *databuf = NULL;
|
||||
int input_bytes_per_block;
|
||||
const int BYTES_PER_SAMPLE = 2;
|
||||
|
||||
if (enc->base_timestamp == GST_CLOCK_TIME_NONE) {
|
||||
enc->base_timestamp = GST_BUFFER_TIMESTAMP (buf);
|
||||
if (enc->base_timestamp == GST_CLOCK_TIME_NONE)
|
||||
enc->base_timestamp = 0;
|
||||
enc->timestamp = enc->base_timestamp;
|
||||
}
|
||||
|
||||
gst_adapter_push (enc->adapter, buf);
|
||||
|
||||
input_bytes_per_block =
|
||||
enc->samples_per_block * BYTES_PER_SAMPLE * enc->channels;
|
||||
|
||||
while (gst_adapter_available (enc->adapter) >= input_bytes_per_block) {
|
||||
databuf = gst_adapter_take_buffer (enc->adapter, input_bytes_per_block);
|
||||
samples = (gint16 *) GST_BUFFER_DATA (databuf);
|
||||
ret = adpcmenc_encode_block (enc, samples, enc->blocksize);
|
||||
gst_buffer_unref (databuf);
|
||||
if (ret != GST_FLOW_OK)
|
||||
goto done;
|
||||
}
|
||||
|
||||
done:
|
||||
gst_object_unref (enc);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
adpcmenc_sink_event (GstPad * pad, GstEvent * event)
|
||||
{
|
||||
ADPCMEnc *enc = (ADPCMEnc *) gst_pad_get_parent (pad);
|
||||
gboolean res;
|
||||
switch (GST_EVENT_TYPE (event)) {
|
||||
case GST_EVENT_FLUSH_STOP:
|
||||
enc->out_samples = 0;
|
||||
enc->timestamp = GST_CLOCK_TIME_NONE;
|
||||
enc->base_timestamp = GST_CLOCK_TIME_NONE;
|
||||
gst_adapter_clear (enc->adapter);
|
||||
/* Fall through */
|
||||
default:
|
||||
res = gst_pad_push_event (enc->srcpad, event);
|
||||
break;
|
||||
}
|
||||
gst_object_unref (enc);
|
||||
return res;
|
||||
}
|
||||
|
||||
static GstStateChangeReturn
|
||||
adpcmenc_change_state (GstElement * element, GstStateChange transition)
|
||||
{
|
||||
GstStateChangeReturn ret;
|
||||
ADPCMEnc *enc = (ADPCMEnc *) 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:
|
||||
adpcmenc_teardown (enc);
|
||||
break;
|
||||
case GST_STATE_CHANGE_READY_TO_NULL:
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void
|
||||
adpcmenc_dispose (GObject * obj)
|
||||
{
|
||||
G_OBJECT_CLASS (parent_class)->dispose (obj);
|
||||
}
|
||||
|
||||
static void
|
||||
adpcmenc_init (ADPCMEnc * enc, ADPCMEncClass * klass)
|
||||
{
|
||||
enc->sinkpad =
|
||||
gst_pad_new_from_static_template (&adpcmenc_sink_template, "sink");
|
||||
gst_pad_set_setcaps_function (enc->sinkpad,
|
||||
GST_DEBUG_FUNCPTR (adpcmenc_sink_setcaps));
|
||||
gst_pad_set_chain_function (enc->sinkpad, GST_DEBUG_FUNCPTR (adpcmenc_chain));
|
||||
gst_pad_set_event_function (enc->sinkpad,
|
||||
GST_DEBUG_FUNCPTR (adpcmenc_sink_event));
|
||||
gst_element_add_pad (GST_ELEMENT (enc), enc->sinkpad);
|
||||
|
||||
enc->srcpad =
|
||||
gst_pad_new_from_static_template (&adpcmenc_src_template, "src");
|
||||
gst_element_add_pad (GST_ELEMENT (enc), enc->srcpad);
|
||||
|
||||
/* Set defaults. */
|
||||
enc->blocksize = DEFAULT_ADPCM_BLOCK_SIZE;
|
||||
enc->layout = DEFAULT_ADPCM_LAYOUT;
|
||||
}
|
||||
|
||||
static void
|
||||
adpcmenc_class_init (ADPCMEncClass * klass)
|
||||
{
|
||||
GObjectClass *gobjectclass = (GObjectClass *) klass;
|
||||
GstElementClass *gstelement_class = (GstElementClass *) klass;
|
||||
|
||||
gobjectclass->set_property = adpcmenc_set_property;
|
||||
gobjectclass->get_property = adpcmenc_get_property;
|
||||
|
||||
g_object_class_install_property (gobjectclass, ARG_LAYOUT,
|
||||
g_param_spec_enum ("layout", "Layout",
|
||||
"Layout for output stream",
|
||||
GST_TYPE_ADPCMENC_LAYOUT, DEFAULT_ADPCM_LAYOUT,
|
||||
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
||||
|
||||
g_object_class_install_property (gobjectclass, ARG_BLOCK_SIZE,
|
||||
g_param_spec_int ("blockalign", "Block Align",
|
||||
"Block size for output stream",
|
||||
MIN_ADPCM_BLOCK_SIZE, MAX_ADPCM_BLOCK_SIZE,
|
||||
DEFAULT_ADPCM_BLOCK_SIZE,
|
||||
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
||||
|
||||
gobjectclass->dispose = adpcmenc_dispose;
|
||||
gstelement_class->change_state = adpcmenc_change_state;
|
||||
} static void
|
||||
|
||||
adpcmenc_base_init (gpointer klass)
|
||||
{
|
||||
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
||||
gst_element_class_add_pad_template (element_class,
|
||||
gst_static_pad_template_get (&adpcmenc_sink_template));
|
||||
gst_element_class_add_pad_template (element_class,
|
||||
gst_static_pad_template_get (&adpcmenc_src_template));
|
||||
gst_element_class_set_details (element_class, &adpcmenc_details);
|
||||
}
|
||||
|
||||
static gboolean
|
||||
plugin_init (GstPlugin * plugin)
|
||||
{
|
||||
GST_DEBUG_CATEGORY_INIT (adpcmenc_debug, "adpcmenc", 0, "ADPCM Encoders");
|
||||
if (!gst_element_register (plugin, "adpcmenc", GST_RANK_PRIMARY,
|
||||
GST_TYPE_ADPCM_ENC)) {
|
||||
return FALSE;
|
||||
}
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "adpcmenc",
|
||||
"ADPCM encoder", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,
|
||||
GST_PACKAGE_ORIGIN);
|
||||
Loading…
Reference in a new issue