gstreamer/ext/speex/gstspeexdec.c
2011-07-06 15:57:23 +02:00

942 lines
25 KiB
C

/* GStreamer
* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
* Copyright (C) 2006 Tim-Philipp Müller <tim centricular 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.
*/
/**
* SECTION:element-speexdec
* @see_also: speexenc, oggdemux
*
* This element decodes a Speex stream to raw integer audio.
* <ulink url="http://www.speex.org/">Speex</ulink> is a royalty-free
* audio codec maintained by the <ulink url="http://www.xiph.org/">Xiph.org
* Foundation</ulink>.
*
* <refsect2>
* <title>Example pipelines</title>
* |[
* gst-launch -v filesrc location=speex.ogg ! oggdemux ! speexdec ! audioconvert ! audioresample ! alsasink
* ]| Decode an Ogg/Speex file. To create an Ogg/Speex file refer to the
* documentation of speexenc.
* </refsect2>
*
* Last reviewed on 2006-04-05 (0.10.2)
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gstspeexdec.h"
#include <stdlib.h>
#include <string.h>
#include <gst/tag/tag.h>
GST_DEBUG_CATEGORY_STATIC (speexdec_debug);
#define GST_CAT_DEFAULT speexdec_debug
#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")
);
#define gst_speex_dec_parent_class parent_class
G_DEFINE_TYPE (GstSpeexDec, gst_speex_dec, GST_TYPE_ELEMENT);
static gboolean speex_dec_sink_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_sink_query (GstPad * pad, GstQuery * query);
static const GstQueryType *speex_get_src_query_types (GstPad * pad);
static const GstQueryType *speex_get_sink_query_types (GstPad * pad);
static gboolean speex_dec_convert (GstPad * pad,
GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value);
static void gst_speex_dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_speex_dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static GstFlowReturn speex_dec_chain_parse_data (GstSpeexDec * dec,
GstBuffer * buf, GstClockTime timestamp, GstClockTime duration);
static GstFlowReturn speex_dec_chain_parse_header (GstSpeexDec * dec,
GstBuffer * buf);
static GstFlowReturn speex_dec_chain_parse_comments (GstSpeexDec * dec,
GstBuffer * buf);
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_speex_dec_set_property;
gobject_class->get_property = gst_speex_dec_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 | G_PARAM_STATIC_STRINGS));
gstelement_class->change_state = GST_DEBUG_FUNCPTR (speex_dec_change_state);
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&speex_dec_src_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&speex_dec_sink_factory));
gst_element_class_set_details_simple (gstelement_class, "Speex audio decoder",
"Codec/Decoder/Audio",
"decode speex streams to audio", "Wim Taymans <wim@fluendo.com>");
GST_DEBUG_CATEGORY_INIT (speexdec_debug, "speexdec", 0,
"speex decoding element");
}
static void
gst_speex_dec_reset (GstSpeexDec * dec)
{
gst_segment_init (&dec->segment, GST_FORMAT_UNDEFINED);
dec->packetno = 0;
dec->frame_size = 0;
dec->frame_duration = 0;
dec->mode = NULL;
free (dec->header);
dec->header = NULL;
speex_bits_destroy (&dec->bits);
gst_buffer_replace (&dec->streamheader, NULL);
gst_buffer_replace (&dec->vorbiscomment, NULL);
if (dec->stereo) {
speex_stereo_state_destroy (dec->stereo);
dec->stereo = NULL;
}
if (dec->state) {
speex_decoder_destroy (dec->state);
dec->state = NULL;
}
}
static void
gst_speex_dec_init (GstSpeexDec * dec)
{
dec->sinkpad =
gst_pad_new_from_static_template (&speex_dec_sink_factory, "sink");
gst_pad_set_chain_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (speex_dec_chain));
gst_pad_set_event_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (speex_dec_sink_event));
gst_pad_set_query_type_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (speex_get_sink_query_types));
gst_pad_set_query_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (speex_dec_sink_query));
gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
dec->srcpad =
gst_pad_new_from_static_template (&speex_dec_src_factory, "src");
gst_pad_use_fixed_caps (dec->srcpad);
gst_pad_set_event_function (dec->srcpad,
GST_DEBUG_FUNCPTR (speex_dec_src_event));
gst_pad_set_query_type_function (dec->srcpad,
GST_DEBUG_FUNCPTR (speex_get_src_query_types));
gst_pad_set_query_function (dec->srcpad,
GST_DEBUG_FUNCPTR (speex_dec_src_query));
gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
dec->enh = DEFAULT_ENH;
gst_speex_dec_reset (dec);
}
static gboolean
speex_dec_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstSpeexDec *dec = GST_SPEEX_DEC (gst_pad_get_parent (pad));
gboolean ret = TRUE;
GstStructure *s;
const GValue *streamheader;
s = gst_caps_get_structure (caps, 0);
if ((streamheader = gst_structure_get_value (s, "streamheader")) &&
G_VALUE_HOLDS (streamheader, GST_TYPE_ARRAY) &&
gst_value_array_get_size (streamheader) >= 2) {
const GValue *header, *vorbiscomment;
GstBuffer *buf;
GstFlowReturn res = GST_FLOW_OK;
header = gst_value_array_get_value (streamheader, 0);
if (header && G_VALUE_HOLDS (header, GST_TYPE_BUFFER)) {
buf = gst_value_get_buffer (header);
res = speex_dec_chain_parse_header (dec, buf);
if (res != GST_FLOW_OK)
goto done;
gst_buffer_replace (&dec->streamheader, buf);
}
vorbiscomment = gst_value_array_get_value (streamheader, 1);
if (vorbiscomment && G_VALUE_HOLDS (vorbiscomment, GST_TYPE_BUFFER)) {
buf = gst_value_get_buffer (vorbiscomment);
res = speex_dec_chain_parse_comments (dec, buf);
if (res != GST_FLOW_OK)
goto done;
gst_buffer_replace (&dec->vorbiscomment, buf);
}
}
done:
gst_object_unref (dec);
return ret;
}
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_SPEEX_DEC (gst_pad_get_parent (pad));
if (src_format == *dest_format) {
*dest_value = src_value;
res = TRUE;
goto cleanup;
}
if (dec->packetno < 1) {
res = FALSE;
goto cleanup;
}
if (pad == dec->sinkpad &&
(src_format == GST_FORMAT_BYTES || *dest_format == GST_FORMAT_BYTES)) {
res = FALSE;
goto cleanup;
}
switch (src_format) {
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
scale = 2 * dec->header->nb_channels;
case GST_FORMAT_DEFAULT:
*dest_value =
gst_util_uint64_scale_int (scale * src_value, dec->header->rate,
GST_SECOND);
break;
default:
res = FALSE;
break;
}
break;
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_BYTES:
*dest_value = src_value * 2 * dec->header->nb_channels;
break;
case GST_FORMAT_TIME:
*dest_value =
gst_util_uint64_scale_int (src_value, GST_SECOND,
dec->header->rate);
break;
default:
res = FALSE;
break;
}
break;
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_value = src_value / (2 * dec->header->nb_channels);
break;
case GST_FORMAT_TIME:
*dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND,
dec->header->rate * 2 * dec->header->nb_channels);
break;
default:
res = FALSE;
break;
}
break;
default:
res = FALSE;
break;
}
cleanup:
gst_object_unref (dec);
return res;
}
static const GstQueryType *
speex_get_sink_query_types (GstPad * pad)
{
static const GstQueryType speex_dec_sink_query_types[] = {
GST_QUERY_CONVERT,
0
};
return speex_dec_sink_query_types;
}
static gboolean
speex_dec_sink_query (GstPad * pad, GstQuery * query)
{
GstSpeexDec *dec;
gboolean res;
dec = GST_SPEEX_DEC (gst_pad_get_parent (pad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONVERT:
{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
res = speex_dec_convert (pad, src_fmt, src_val, &dest_fmt, &dest_val);
if (res) {
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
}
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
gst_object_unref (dec);
return res;
}
static const GstQueryType *
speex_get_src_query_types (GstPad * pad)
{
static const GstQueryType speex_dec_src_query_types[] = {
GST_QUERY_POSITION,
GST_QUERY_DURATION,
0
};
return speex_dec_src_query_types;
}
static gboolean
speex_dec_src_query (GstPad * pad, GstQuery * query)
{
GstSpeexDec *dec;
gboolean res = FALSE;
dec = GST_SPEEX_DEC (gst_pad_get_parent (pad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:{
GstSegment segment;
GstFormat format;
gint64 cur;
gst_query_parse_position (query, &format, NULL);
GST_PAD_STREAM_LOCK (dec->sinkpad);
segment = dec->segment;
GST_PAD_STREAM_UNLOCK (dec->sinkpad);
if (segment.format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (dec, "segment not initialised yet");
break;
}
if ((res = speex_dec_convert (dec->srcpad, GST_FORMAT_TIME,
segment.position, &format, &cur))) {
gst_query_set_position (query, format, cur);
}
break;
}
case GST_QUERY_DURATION:{
GstFormat format = GST_FORMAT_TIME;
gint64 dur;
/* get duration from demuxer */
if (!gst_pad_query_peer_duration (dec->sinkpad, &format, &dur))
break;
gst_query_parse_duration (query, &format, NULL);
/* and convert it into the requested format */
if ((res = speex_dec_convert (dec->srcpad, GST_FORMAT_TIME,
dur, &format, &dur))) {
gst_query_set_duration (query, format, dur);
}
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
gst_object_unref (dec);
return res;
}
static gboolean
speex_dec_src_event (GstPad * pad, GstEvent * event)
{
gboolean res = FALSE;
GstSpeexDec *dec = GST_SPEEX_DEC (gst_pad_get_parent (pad));
GST_LOG_OBJECT (dec, "handling %s event", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:{
GstFormat format, tformat;
gdouble rate;
GstEvent *real_seek;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gint64 cur, stop;
gint64 tcur, tstop;
gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur,
&stop_type, &stop);
/* we have to ask our peer to seek to time here as we know
* nothing about how to generate a granulepos from the src
* formats or anything.
*
* First bring the requested format to time
*/
tformat = GST_FORMAT_TIME;
if (!(res = speex_dec_convert (pad, format, cur, &tformat, &tcur)))
break;
if (!(res = speex_dec_convert (pad, format, stop, &tformat, &tstop)))
break;
/* then seek with time on the peer */
real_seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
flags, cur_type, tcur, stop_type, tstop);
GST_LOG_OBJECT (dec, "seek to %" GST_TIME_FORMAT, GST_TIME_ARGS (tcur));
res = gst_pad_push_event (dec->sinkpad, real_seek);
gst_event_unref (event);
break;
}
default:
res = gst_pad_event_default (pad, event);
break;
}
gst_object_unref (dec);
return res;
}
static gboolean
speex_dec_sink_event (GstPad * pad, GstEvent * event)
{
GstSpeexDec *dec;
gboolean ret = FALSE;
dec = GST_SPEEX_DEC (gst_pad_get_parent (pad));
GST_LOG_OBJECT (dec, "handling %s event", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
ret = speex_dec_sink_setcaps (pad, caps);
gst_event_unref (event);
break;
}
case GST_EVENT_SEGMENT:{
GstSegment segment;
gst_event_copy_segment (event, &segment);
if (segment.format != GST_FORMAT_TIME)
goto newseg_wrong_format;
if (segment.rate <= 0.0)
goto newseg_wrong_rate;
#if 0
if (update) {
/* time progressed without data, see if we can fill the gap with
* some concealment data */
if (dec->segment.position < start) {
GstClockTime duration;
duration = start - dec->segment.position;
speex_dec_chain_parse_data (dec, NULL, dec->segment.position,
duration);
}
}
#endif
/* now configure the values */
dec->segment = segment;
GST_DEBUG_OBJECT (dec, "segment now: %" GST_SEGMENT_FORMAT, &segment);
ret = gst_pad_push_event (dec->srcpad, event);
break;
}
default:
ret = gst_pad_event_default (pad, event);
break;
}
gst_object_unref (dec);
return ret;
/* ERRORS */
newseg_wrong_format:
{
GST_DEBUG_OBJECT (dec, "received non TIME newsegment");
gst_object_unref (dec);
return FALSE;
}
newseg_wrong_rate:
{
GST_DEBUG_OBJECT (dec, "negative rates not supported yet");
gst_object_unref (dec);
return FALSE;
}
}
static GstFlowReturn
speex_dec_chain_parse_header (GstSpeexDec * dec, GstBuffer * buf)
{
GstCaps *caps;
char *data;
gsize size;
/* get the header */
data = gst_buffer_map (buf, &size, NULL, GST_MAP_READ);
dec->header = speex_packet_to_header (data, size);
gst_buffer_unmap (buf, data, size);
if (!dec->header)
goto no_header;
if (dec->header->mode >= SPEEX_NB_MODES || dec->header->mode < 0)
goto mode_too_old;
dec->mode = speex_lib_get_mode (dec->header->mode);
/* initialize the decoder */
dec->state = speex_decoder_init (dec->mode);
if (!dec->state)
goto init_failed;
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->stereo = speex_stereo_state_init ();
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);
dec->frame_duration = gst_util_uint64_scale_int (dec->frame_size,
GST_SECOND, 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))
goto nego_failed;
gst_caps_unref (caps);
return GST_FLOW_OK;
/* ERRORS */
no_header:
{
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
(NULL), ("couldn't read header"));
return GST_FLOW_ERROR;
}
mode_too_old:
{
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;
}
init_failed:
{
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
(NULL), ("couldn't initialize decoder"));
return GST_FLOW_ERROR;
}
nego_failed:
{
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
(NULL), ("couldn't negotiate format"));
gst_caps_unref (caps);
return GST_FLOW_NOT_NEGOTIATED;
}
}
static GstFlowReturn
speex_dec_chain_parse_comments (GstSpeexDec * dec, GstBuffer * buf)
{
GstTagList *list;
gchar *ver, *encoder = NULL;
list = gst_tag_list_from_vorbiscomment_buffer (buf, NULL, 0, &encoder);
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);
}
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_AUDIO_CODEC, "Speex", NULL);
ver = g_strndup (dec->header->speex_version, SPEEX_HEADER_VERSION_LENGTH);
g_strstrip (ver);
if (ver != NULL && *ver != '\0') {
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_ENCODER_VERSION, ver, NULL);
}
if (dec->header->bitrate > 0) {
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_BITRATE, (guint) dec->header->bitrate, NULL);
}
GST_INFO_OBJECT (dec, "tags: %" GST_PTR_FORMAT, list);
gst_element_found_tags_for_pad (GST_ELEMENT (dec), dec->srcpad, list);
g_free (encoder);
g_free (ver);
return GST_FLOW_OK;
}
static GstFlowReturn
speex_dec_chain_parse_data (GstSpeexDec * dec, GstBuffer * buf,
GstClockTime timestamp, GstClockTime duration)
{
GstFlowReturn res = GST_FLOW_OK;
gint i, fpp;
SpeexBits *bits;
gsize size;
char *data;
if (!dec->frame_duration)
goto not_negotiated;
if (timestamp != -1) {
dec->segment.position = timestamp;
} else {
timestamp = dec->segment.position;
}
if (buf) {
/* send data to the bitstream */
data = gst_buffer_map (buf, &size, NULL, GST_MAP_READ);
speex_bits_read_from (&dec->bits, data, size);
gst_buffer_unmap (buf, data, size);
fpp = dec->header->frames_per_packet;
bits = &dec->bits;
GST_DEBUG_OBJECT (dec, "received buffer of size %u, fpp %d, %d bits", size,
fpp, speex_bits_remaining (bits));
} else {
/* concealment data, pass NULL as the bits parameters */
GST_DEBUG_OBJECT (dec, "creating concealment data");
fpp = dec->header->frames_per_packet;
bits = NULL;
}
/* now decode each frame, catering for unknown number of them (e.g. rtp) */
for (i = 0; i < fpp; i++) {
GstBuffer *outbuf;
gint16 *out_data;
gint ret;
GST_LOG_OBJECT (dec, "decoding frame %d/%d, %d bits remaining", i, fpp,
bits ? speex_bits_remaining (bits) : -1);
#if 0
res = gst_pad_alloc_buffer_and_set_caps (dec->srcpad,
GST_BUFFER_OFFSET_NONE, dec->frame_size * dec->header->nb_channels * 2,
GST_PAD_CAPS (dec->srcpad), &outbuf);
if (res != GST_FLOW_OK) {
GST_DEBUG_OBJECT (dec, "buf alloc flow: %s", gst_flow_get_name (res));
return res;
}
#endif
/* FIXME, we can use a bufferpool because we have fixed size buffers. We
* could also use an allocator */
outbuf =
gst_buffer_new_allocate (NULL,
dec->frame_size * dec->header->nb_channels * 2, 0);
out_data = gst_buffer_map (outbuf, &size, NULL, GST_MAP_WRITE);
ret = speex_decode_int (dec->state, bits, out_data);
gst_buffer_unmap (outbuf, out_data, size);
if (ret == -1) {
/* uh? end of stream */
if (fpp == 0 && speex_bits_remaining (bits) < 8) {
/* if we did not know how many frames to expect, then we get this
at the end if there are leftover bits to pad to the next byte */
} else {
GST_WARNING_OBJECT (dec, "Unexpected end of stream found");
}
gst_buffer_unref (outbuf);
outbuf = NULL;
break;
} else if (ret == -2) {
GST_WARNING_OBJECT (dec, "Decoding error: corrupted stream?");
gst_buffer_unref (outbuf);
outbuf = NULL;
break;
}
if (bits && speex_bits_remaining (bits) < 0) {
GST_WARNING_OBJECT (dec, "Decoding overflow: corrupted stream?");
gst_buffer_unref (outbuf);
outbuf = NULL;
break;
}
if (dec->header->nb_channels == 2)
speex_decode_stereo_int (out_data, dec->frame_size, dec->stereo);
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
GST_BUFFER_DURATION (outbuf) = dec->frame_duration;
dec->segment.position += dec->frame_duration;
timestamp = dec->segment.position;
GST_LOG_OBJECT (dec, "pushing buffer with ts=%" GST_TIME_FORMAT ", dur=%"
GST_TIME_FORMAT, GST_TIME_ARGS (timestamp),
GST_TIME_ARGS (dec->frame_duration));
res = gst_pad_push (dec->srcpad, outbuf);
if (res != GST_FLOW_OK) {
GST_DEBUG_OBJECT (dec, "flow: %s", gst_flow_get_name (res));
break;
}
}
return res;
/* ERRORS */
not_negotiated:
{
GST_ELEMENT_ERROR (dec, CORE, NEGOTIATION, (NULL),
("decoder not initialized"));
return GST_FLOW_NOT_NEGOTIATED;
}
}
static gboolean
memcmp_buffers (GstBuffer * buf1, GstBuffer * buf2)
{
gsize size1, size2;
gpointer data1;
gboolean res;
size1 = gst_buffer_get_size (buf1);
size2 = gst_buffer_get_size (buf2);
if (size1 != size2)
return FALSE;
data1 = gst_buffer_map (buf1, NULL, NULL, GST_MAP_READ);
res = gst_buffer_memcmp (buf2, 0, data1, size1) == 0;
gst_buffer_unmap (buf1, data1, size1);
return res;
}
static GstFlowReturn
speex_dec_chain (GstPad * pad, GstBuffer * buf)
{
GstFlowReturn res;
GstSpeexDec *dec;
dec = GST_SPEEX_DEC (gst_pad_get_parent (pad));
/* If we have the streamheader and vorbiscomment from the caps already
* ignore them here */
if (dec->streamheader && dec->vorbiscomment) {
if (memcmp_buffers (dec->streamheader, buf)) {
res = GST_FLOW_OK;
} else if (memcmp_buffers (dec->vorbiscomment, buf)) {
res = GST_FLOW_OK;
} else {
res =
speex_dec_chain_parse_data (dec, buf, GST_BUFFER_TIMESTAMP (buf),
GST_BUFFER_DURATION (buf));
}
} else {
/* Otherwise fall back to packet counting and assume that the
* first two packets are the headers. */
switch (dec->packetno) {
case 0:
res = speex_dec_chain_parse_header (dec, buf);
break;
case 1:
res = speex_dec_chain_parse_comments (dec, buf);
break;
default:
res =
speex_dec_chain_parse_data (dec, buf, GST_BUFFER_TIMESTAMP (buf),
GST_BUFFER_DURATION (buf));
break;
}
}
dec->packetno++;
gst_buffer_unref (buf);
gst_object_unref (dec);
return res;
}
static void
gst_speex_dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstSpeexDec *speexdec;
speexdec = GST_SPEEX_DEC (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_speex_dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstSpeexDec *speexdec;
speexdec = GST_SPEEX_DEC (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)
{
GstStateChangeReturn ret;
GstSpeexDec *dec = GST_SPEEX_DEC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
case GST_STATE_CHANGE_READY_TO_PAUSED:
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret != GST_STATE_CHANGE_SUCCESS)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_speex_dec_reset (dec);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}