gstreamer/ext/speex/gstspeexdec.c

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/* GStreamer
* Copyright (C) 2004 Wim Taymans <wim@fluendo.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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gstspeexdec.h"
#include <string.h>
//#include <gst/tag/tag.h>
GST_DEBUG_CATEGORY (speexdec_debug);
#define GST_CAT_DEFAULT speexdec_debug
static GstElementDetails speex_dec_details = {
"SpeexDec",
"Codec/Decoder/Audio",
"decode speex streams to audio",
"Wim Taymans <wim@fluendo.com>",
};
#define DEFAULT_ENH TRUE
enum
{
ARG_0,
ARG_ENH
};
static GstStaticPadTemplate speex_dec_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"rate = (int) [ 6000, 48000 ], "
"channels = (int) [ 1, 2 ], "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) true, " "width = (int) 16, " "depth = (int) 16")
);
static GstStaticPadTemplate speex_dec_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-speex")
);
GST_BOILERPLATE (GstSpeexDec, gst_speex_dec, GstElement, GST_TYPE_ELEMENT);
static gboolean speex_dec_event (GstPad * pad, GstEvent * event);
static GstFlowReturn speex_dec_chain (GstPad * pad, GstBuffer * buf);
static GstStateChangeReturn speex_dec_change_state (GstElement * element,
GstStateChange transition);
static gboolean speex_dec_src_event (GstPad * pad, GstEvent * event);
static gboolean speex_dec_src_query (GstPad * pad, GstQuery * query);
static gboolean speex_dec_convert (GstPad * pad,
GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value);
static void gst_speexdec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_speexdec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void
gst_speex_dec_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 (&speex_dec_src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&speex_dec_sink_factory));
gst_element_class_set_details (element_class, &speex_dec_details);
}
static void
gst_speex_dec_class_init (GstSpeexDecClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->set_property = gst_speexdec_set_property;
gobject_class->get_property = gst_speexdec_get_property;
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ENH,
g_param_spec_boolean ("enh", "Enh", "Enable perceptual enhancement",
DEFAULT_ENH, G_PARAM_READWRITE));
gstelement_class->change_state = speex_dec_change_state;
GST_DEBUG_CATEGORY_INIT (speexdec_debug, "speexdec", 0,
"speex decoding element");
}
static const GstQueryType *
speex_get_query_types (GstPad * pad)
{
static const GstQueryType speex_dec_src_query_types[] = {
GST_QUERY_POSITION,
0
};
return speex_dec_src_query_types;
}
static void
gst_speex_dec_init (GstSpeexDec * dec, GstSpeexDecClass * g_class)
{
dec->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&speex_dec_sink_factory), "sink");
gst_pad_set_chain_function (dec->sinkpad, speex_dec_chain);
gst_pad_set_event_function (dec->sinkpad, speex_dec_event);
gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
dec->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&speex_dec_src_factory), "src");
gst_pad_use_fixed_caps (dec->srcpad);
gst_pad_set_event_function (dec->srcpad, speex_dec_src_event);
gst_pad_set_query_type_function (dec->srcpad, speex_get_query_types);
gst_pad_set_query_function (dec->srcpad, speex_dec_src_query);
gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
dec->enh = DEFAULT_ENH;
}
static gboolean
speex_dec_convert (GstPad * pad,
GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value)
{
gboolean res = TRUE;
GstSpeexDec *dec;
guint64 scale = 1;
dec = GST_SPEEXDEC (gst_pad_get_parent (pad));
if (dec->packetno < 1)
return FALSE;
if (pad == dec->sinkpad &&
(src_format == GST_FORMAT_BYTES || *dest_format == GST_FORMAT_BYTES))
return FALSE;
switch (src_format) {
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
scale = sizeof (float) * dec->header->nb_channels;
case GST_FORMAT_DEFAULT:
*dest_value = scale * (src_value * dec->header->rate / GST_SECOND);
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_BYTES:
*dest_value = src_value * sizeof (float) * dec->header->nb_channels;
break;
case GST_FORMAT_TIME:
*dest_value = src_value * GST_SECOND / dec->header->rate;
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_value = src_value / (sizeof (float) * dec->header->nb_channels);
break;
case GST_FORMAT_TIME:
*dest_value = src_value * GST_SECOND /
(dec->header->rate * sizeof (float) * dec->header->nb_channels);
break;
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
static gboolean
speex_dec_src_query (GstPad * pad, GstQuery * query)
{
gint64 samples_out = 0, total_samples;
GstSpeexDec *dec = GST_SPEEXDEC (GST_OBJECT_PARENT (pad));
GstFormat my_format = GST_FORMAT_TIME;
GstPad *peer;
if (GST_QUERY_TYPE (query) != GST_QUERY_POSITION)
return FALSE;
if (!(peer = gst_pad_get_peer (dec->sinkpad)))
return FALSE;
gst_pad_query_position (peer, &my_format, NULL, &total_samples);
gst_object_unref (peer);
samples_out = dec->samples_out;
speex_dec_convert (dec->srcpad, GST_FORMAT_DEFAULT, samples_out,
&my_format, &samples_out);
speex_dec_convert (dec->srcpad, GST_FORMAT_DEFAULT, total_samples,
&my_format, &total_samples);
gst_query_set_position (query, GST_FORMAT_TIME, samples_out, total_samples);
return TRUE;
}
static gboolean
speex_dec_src_event (GstPad * pad, GstEvent * event)
{
gboolean res = TRUE;
GstSpeexDec *dec = GST_SPEEXDEC (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:{
gint64 cur, stop;
GstFormat format, my_format = GST_FORMAT_DEFAULT;
GstSeekType cur_type, stop_type;
GstSeekFlags flags;
gst_event_parse_seek (event, NULL, &format, &flags, &cur_type, &cur,
&stop_type, &stop);
/* convert to samples_out */
if (speex_dec_convert (pad, format, cur, &my_format, &cur) &&
(stop == -1 ||
speex_dec_convert (pad, format, stop, &my_format, &stop))) {
GstEvent *real_seek = gst_event_new_seek (1.0, GST_FORMAT_DEFAULT,
flags, cur_type, cur, stop_type, stop);
res = gst_pad_send_event (GST_PAD_PEER (dec->sinkpad), real_seek);
} else
res = FALSE;
gst_event_unref (event);
break;
}
default:
res = gst_pad_event_default (pad, event);
break;
}
return res;
}
static gboolean
speex_dec_event (GstPad * pad, GstEvent * event)
{
GstSpeexDec *dec = GST_SPEEXDEC (GST_OBJECT_PARENT (pad));
gint64 value, time;
GstFormat fmt;
GST_LOG_OBJECT (dec, "handling event");
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:
gst_event_parse_newsegment (event, NULL, &fmt, &value, NULL, NULL);
if (fmt == GST_FORMAT_DEFAULT) {
dec->samples_out = value;
GST_DEBUG_OBJECT (dec,
"setting samples_out to %" G_GUINT64_FORMAT " after discont",
value);
} else {
GST_WARNING_OBJECT (dec,
"discont event didn't include offset, we might set it wrong now");
value = 0;
}
if (dec->packetno < 2) {
if (dec->samples_out != 0)
GST_ELEMENT_ERROR (dec, STREAM, DECODE, (NULL),
("can't handle discont before parsing first 2 packets"));
dec->packetno = 0;
gst_pad_push_event (dec->srcpad,
gst_event_new_newsegment (1.0, GST_FORMAT_TIME,
0, GST_CLOCK_TIME_NONE, 0));
} else {
GstFormat time_format = GST_FORMAT_TIME;
dec->packetno = 2;
/* if one of them works, all of them work */
if (speex_dec_convert (dec->srcpad, GST_FORMAT_DEFAULT,
dec->samples_out, &time_format, &time)) {
gst_pad_push_event (dec->srcpad,
gst_event_new_newsegment (1.0, GST_FORMAT_TIME,
time, GST_CLOCK_TIME_NONE, 0));
} else {
GST_ERROR_OBJECT (dec,
"failed to parse data for DISCONT event, not sending any");
}
}
gst_event_unref (event);
break;
default:
return gst_pad_event_default (dec->sinkpad, event);
}
return TRUE;
}
static GstFlowReturn
speex_dec_chain (GstPad * pad, GstBuffer * buf)
{
GstFlowReturn res;
GstSpeexDec *dec;
dec = GST_SPEEXDEC (gst_pad_get_parent (pad));
if (dec->packetno == 0) {
GstCaps *caps;
/* get the header */
dec->header = speex_packet_to_header ((char *) GST_BUFFER_DATA (buf),
GST_BUFFER_SIZE (buf));
gst_buffer_unref (buf);
if (!dec->header) {
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
(NULL), ("couldn't read header"));
return GST_FLOW_ERROR;
}
if (dec->header->mode >= SPEEX_NB_MODES) {
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
(NULL),
("Mode number %d does not (yet/any longer) exist in this version",
dec->header->mode));
return GST_FLOW_ERROR;
}
dec->mode = (SpeexMode *) speex_mode_list[dec->header->mode];
/* initialize the decoder */
dec->state = speex_decoder_init (dec->mode);
if (!dec->state) {
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
(NULL), ("couldn't initialize decoder"));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
speex_decoder_ctl (dec->state, SPEEX_SET_ENH, &dec->enh);
speex_decoder_ctl (dec->state, SPEEX_GET_FRAME_SIZE, &dec->frame_size);
if (dec->header->nb_channels != 1) {
dec->callback.callback_id = SPEEX_INBAND_STEREO;
dec->callback.func = speex_std_stereo_request_handler;
dec->callback.data = &dec->stereo;
speex_decoder_ctl (dec->state, SPEEX_SET_HANDLER, &dec->callback);
}
speex_decoder_ctl (dec->state, SPEEX_SET_SAMPLING_RATE, &dec->header->rate);
speex_bits_init (&dec->bits);
/* set caps */
caps = gst_caps_new_simple ("audio/x-raw-int",
"rate", G_TYPE_INT, dec->header->rate,
"channels", G_TYPE_INT, dec->header->nb_channels,
"signed", G_TYPE_BOOLEAN, TRUE,
"endianness", G_TYPE_INT, G_BYTE_ORDER,
"width", G_TYPE_INT, 16, "depth", G_TYPE_INT, 16, NULL);
if (!gst_pad_set_caps (dec->srcpad, caps)) {
gst_caps_unref (caps);
return GST_FLOW_NOT_NEGOTIATED;
}
gst_caps_unref (caps);
gst_pad_push_event (dec->srcpad,
gst_event_new_newsegment (1.0, GST_FORMAT_TIME,
0, GST_CLOCK_TIME_NONE, 0));
} else if (dec->packetno == 1) {
gchar *encoder = NULL;
/* FIXME parse comments */
GstTagList *list = gst_tag_list_new (); //gst_tag_list_from_vorbiscomment_buffer (buf, "", 1,
// &encoder);
gst_buffer_unref (buf);
if (!list) {
GST_WARNING_OBJECT (dec, "couldn't decode comments");
list = gst_tag_list_new ();
}
if (encoder) {
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_ENCODER, encoder, NULL);
g_free (encoder);
}
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_AUDIO_CODEC, "Speex", NULL);
/*
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_ENCODER_VERSION, dec->vi.version, NULL);
if (dec->vi.bitrate_upper > 0)
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_MAXIMUM_BITRATE, (guint) vd->vi.bitrate_upper, NULL);
if (vd->vi.bitrate_nominal > 0)
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_NOMINAL_BITRATE, (guint) vd->vi.bitrate_nominal, NULL);
if (vd->vi.bitrate_lower > 0)
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_MINIMUM_BITRATE, (guint) vd->vi.bitrate_lower, NULL);
*/
gst_element_found_tags_for_pad (GST_ELEMENT (dec), dec->srcpad, list);
} else {
gint i;
/* send data to the bitstream */
speex_bits_read_from (&dec->bits, (char *) GST_BUFFER_DATA (buf),
GST_BUFFER_SIZE (buf));
gst_buffer_unref (buf);
/* now decode each frame */
for (i = 0; i < dec->header->frames_per_packet; i++) {
gint ret;
GstBuffer *outbuf;
gint16 *out_data;
ret = speex_decode (dec->state, &dec->bits, dec->output);
if (ret == -1) {
/* uh? end of stream */
GST_WARNING_OBJECT (dec, "Unexpected end of stream found");
break;
} else if (ret == -2) {
GST_WARNING_OBJECT (dec, "Decoding error: corrupted stream?");
break;
}
if (speex_bits_remaining (&dec->bits) < 0) {
GST_WARNING_OBJECT (dec, "Decoding overflow: corrupted stream?");
break;
}
if (dec->header->nb_channels == 2)
speex_decode_stereo (dec->output, dec->frame_size, &dec->stereo);
if ((res = gst_pad_alloc_buffer (dec->srcpad, GST_BUFFER_OFFSET_NONE,
dec->frame_size * dec->header->nb_channels * 2,
GST_PAD_CAPS (dec->srcpad), &outbuf)) != GST_FLOW_OK)
return res;
out_data = (gint16 *) GST_BUFFER_DATA (outbuf);
/*PCM saturation (just in case) */
for (i = 0; i < dec->frame_size * dec->header->nb_channels; i++) {
if (dec->output[i] > 32767.0)
out_data[i] = 32767;
else if (dec->output[i] < -32768.0)
out_data[i] = -32768;
else
out_data[i] = (gint16) dec->output[i];
}
GST_BUFFER_OFFSET (outbuf) = dec->samples_out;
GST_BUFFER_OFFSET_END (outbuf) = dec->samples_out + dec->frame_size;
GST_BUFFER_TIMESTAMP (outbuf) =
dec->samples_out * GST_SECOND / dec->header->rate;
GST_BUFFER_DURATION (outbuf) =
dec->frame_size * GST_SECOND / dec->header->rate;
res = gst_pad_push (dec->srcpad, outbuf);
if (res != GST_FLOW_OK && res != GST_FLOW_NOT_LINKED)
return res;
dec->samples_out += dec->frame_size;
}
}
dec->packetno++;
return GST_FLOW_OK;
}
static void
gst_speexdec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstSpeexDec *speexdec;
g_return_if_fail (GST_IS_SPEEXDEC (object));
speexdec = GST_SPEEXDEC (object);
switch (prop_id) {
case ARG_ENH:
g_value_set_boolean (value, speexdec->enh);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_speexdec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstSpeexDec *speexdec;
g_return_if_fail (GST_IS_SPEEXDEC (object));
speexdec = GST_SPEEXDEC (object);
switch (prop_id) {
case ARG_ENH:
speexdec->enh = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
speex_dec_change_state (GstElement * element, GstStateChange transition)
{
GstSpeexDec *vd = GST_SPEEXDEC (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;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
vd->packetno = 0;
vd->samples_out = 0;
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return parent_class->change_state (element, transition);
}