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gstreamer/ext/mad/gstmad.c
Wim Taymans b0c33553d3 - Changed plugins for new APIs 
Original commit message from CVS:
- Changed plugins for new APIs
- modularized audiofile.
- added seeking, query and convert functions for mad, mpeg2dec,
avidemux, mpegdemux, mpegparse
- sync updates to oss. removed the ossclock for now
2002-05-26 21:59:22 +00:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
#include <gst/gst.h>
#include <string.h>
#include <mad.h>
#define GST_TYPE_MAD \
(gst_mad_get_type())
#define GST_MAD(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MAD,GstMad))
#define GST_MAD_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MAD,GstMad))
#define GST_IS_MAD(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MAD))
#define GST_IS_MAD_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MAD))
typedef struct _GstMad GstMad;
typedef struct _GstMadClass GstMadClass;
struct _GstMad {
GstElement element;
/* pads */
GstPad *sinkpad, *srcpad;
/* state */
struct mad_stream stream;
struct mad_frame frame;
struct mad_synth synth;
guchar *tempbuffer;
glong tempsize;
gboolean need_sync;
guint64 base_time;
guint64 framestamp; /* timestamp-like, but counted in frames */
guint64 total_samples; /* the number of samples since the sync point */
gboolean restart;
/* info */
struct mad_header header;
gboolean new_header;
gboolean can_seek;
gint channels;
guint framecount;
gint vbr_average; /* average bitrate */
guint64 vbr_rate; /* average * framecount */
/* caps */
gboolean caps_set;
};
struct _GstMadClass {
GstElementClass parent_class;
};
/* elementfactory information */
static GstElementDetails gst_mad_details = {
"mad mp3 decoder",
"Codec/Audio/Decoder",
"Uses mad code to decode mp3 streams",
VERSION,
"Wim Taymans <wim.taymans@chello.be>",
"(C) 2001",
};
/* Mad signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_LAYER,
ARG_MODE,
ARG_EMPHASIS,
ARG_BITRATE,
ARG_SAMPLERATE,
ARG_CHANNELS,
ARG_AVERAGE_BITRATE,
/* FILL ME */
};
GST_PAD_TEMPLATE_FACTORY (mad_src_template_factory,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"mad_src",
"audio/raw",
"format", GST_PROPS_STRING ("int"),
"law", GST_PROPS_INT (0),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"signed", GST_PROPS_BOOLEAN (TRUE),
"width", GST_PROPS_INT (16),
"depth", GST_PROPS_INT (16),
"rate", GST_PROPS_INT_RANGE (11025, 48000),
"channels", GST_PROPS_INT_RANGE (1, 2)
)
)
GST_PAD_TEMPLATE_FACTORY (mad_sink_template_factory,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"mad_sink",
"audio/mp3",
NULL
)
)
static void gst_mad_class_init (GstMadClass *klass);
static void gst_mad_init (GstMad *mad);
static void gst_mad_dispose (GObject *object);
static void gst_mad_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec);
static void gst_mad_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static gboolean gst_mad_src_event (GstPad *pad, GstEvent *event);
static gboolean gst_mad_src_query (GstPad *pad, GstPadQueryType type,
GstFormat *format, gint64 *value);
static gboolean gst_mad_convert_sink (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
static gboolean gst_mad_convert_src (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
static void gst_mad_chain (GstPad *pad, GstBuffer *buffer);
static GstElementStateReturn
gst_mad_change_state (GstElement *element);
static GstElementClass *parent_class = NULL;
/* static guint gst_mad_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_mad_get_type (void)
{
static GType mad_type = 0;
if (!mad_type) {
static const GTypeInfo mad_info = {
sizeof(GstMadClass),
NULL,
NULL,
(GClassInitFunc)gst_mad_class_init,
NULL,
NULL,
sizeof(GstMad),
0,
(GInstanceInitFunc)gst_mad_init,
};
mad_type = g_type_register_static(GST_TYPE_ELEMENT, "GstMad", &mad_info, 0);
}
return mad_type;
}
static gchar *layers[] = { "unknown", "I", "II", "III" };
static gchar *modes[] = { "single channel", "dual channel", "joint stereo", "stereo" };
static gchar *emphases[] = { "none", "50/15 microseconds", "CCITT J.17" };
static void
gst_mad_class_init (GstMadClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*) klass;
gstelement_class = (GstElementClass*) klass;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
gobject_class->set_property = gst_mad_set_property;
gobject_class->get_property = gst_mad_get_property;
gobject_class->dispose = gst_mad_dispose;
gstelement_class->change_state = gst_mad_change_state;
/* init properties */
/* currently, string representations are used, we might want to change that */
/* FIXME: descriptions need to be more technical, default values and ranges need to be selected right */
g_object_class_install_property (gobject_class, ARG_LAYER,
g_param_spec_string ("layer", "Layer", "The audio MPEG Layer this stream is encoded in",
layers[0], G_PARAM_READABLE));
g_object_class_install_property (gobject_class, ARG_MODE,
g_param_spec_string ("mode", "Mode", "The current mode of the channels",
modes[0], G_PARAM_READABLE));
g_object_class_install_property (gobject_class, ARG_EMPHASIS,
g_param_spec_string ("emphasis", "Emphasis", "Emphasis",
emphases[0], G_PARAM_READABLE));
g_object_class_install_property (gobject_class, ARG_BITRATE,
g_param_spec_int ("bitrate", "Bitrate", "current bitrate of the stream",
0, G_MAXINT, 0, G_PARAM_READABLE));
g_object_class_install_property (gobject_class, ARG_AVERAGE_BITRATE,
g_param_spec_int ("average-bitrate", "average bitrate", "average bitrate of the stream",
0, G_MAXINT, 0, G_PARAM_READABLE));
g_object_class_install_property (gobject_class, ARG_SAMPLERATE,
g_param_spec_int ("samplerate", "Samplerate", "current samplerate of the stream",
0, G_MAXINT, 0, G_PARAM_READABLE));
g_object_class_install_property (gobject_class, ARG_CHANNELS,
g_param_spec_int ("channels", "Channels", "number of channels",
1, 2, 1, G_PARAM_READABLE));
}
static void
gst_mad_init (GstMad *mad)
{
/* create the sink and src pads */
mad->sinkpad = gst_pad_new_from_template(
GST_PAD_TEMPLATE_GET (mad_sink_template_factory), "sink");
gst_element_add_pad (GST_ELEMENT (mad), mad->sinkpad);
gst_pad_set_chain_function (mad->sinkpad, GST_DEBUG_FUNCPTR (gst_mad_chain));
gst_pad_set_convert_function (mad->sinkpad, GST_DEBUG_FUNCPTR (gst_mad_convert_sink));
mad->srcpad = gst_pad_new_from_template(
GST_PAD_TEMPLATE_GET (mad_src_template_factory), "src");
gst_element_add_pad (GST_ELEMENT (mad), mad->srcpad);
gst_pad_set_event_function (mad->srcpad, GST_DEBUG_FUNCPTR (gst_mad_src_event));
gst_pad_set_query_function (mad->srcpad, GST_DEBUG_FUNCPTR (gst_mad_src_query));
gst_pad_set_convert_function (mad->srcpad, GST_DEBUG_FUNCPTR (gst_mad_convert_src));
mad->tempbuffer = g_malloc (MAD_BUFFER_MDLEN * 3);
mad->tempsize = 0;
mad->need_sync = TRUE;
mad->base_time = 0;
mad->framestamp = 0;
mad->total_samples = 0;
mad->new_header = TRUE;
mad->framecount = 0;
mad->vbr_average = 0;
mad->vbr_rate = 0;
mad->restart = FALSE;
GST_FLAG_SET (mad, GST_ELEMENT_EVENT_AWARE);
}
static void
gst_mad_dispose (GObject *object)
{
GstMad *mad = GST_MAD (object);
G_OBJECT_CLASS (parent_class)->dispose (object);
g_free (mad->tempbuffer);
}
static gboolean
gst_mad_convert_sink (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
gboolean res = TRUE;
GstMad *mad;
if (src_format == *dest_format) {
*dest_value = src_value;
return TRUE;
}
mad = GST_MAD (gst_pad_get_parent (pad));
if (mad->vbr_average == 0)
return FALSE;
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_TIME;
case GST_FORMAT_TIME:
/* multiply by 8 because vbr is in bits/second */
*dest_value = src_value * 8 * GST_SECOND / mad->vbr_average;
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_BYTES;
case GST_FORMAT_BYTES:
/* multiply by 8 because vbr is in bits/second */
*dest_value = src_value * mad->vbr_average / (8 * GST_SECOND);
break;
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
static gboolean
gst_mad_convert_src (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
gboolean res = TRUE;
guint scale = 1;
gint bytes_per_sample;
GstMad *mad;
if (src_format == *dest_format) {
*dest_value = src_value;
return res;
}
mad = GST_MAD (gst_pad_get_parent (pad));
bytes_per_sample = MAD_NCHANNELS (&mad->frame.header) << 1;
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_SAMPLES:
if (bytes_per_sample == 0)
return FALSE;
*dest_value = src_value / bytes_per_sample;
break;
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_TIME;
case GST_FORMAT_TIME:
{
gint byterate = bytes_per_sample * mad->frame.header.samplerate;
if (byterate == 0)
return FALSE;
*dest_value = src_value * GST_SECOND / byterate;
break;
}
default:
res = FALSE;
}
break;
case GST_FORMAT_SAMPLES:
switch (*dest_format) {
case GST_FORMAT_BYTES:
*dest_value = src_value * bytes_per_sample;
break;
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_TIME;
case GST_FORMAT_TIME:
if (mad->frame.header.samplerate == 0)
return FALSE;
*dest_value = src_value * GST_SECOND / mad->frame.header.samplerate;
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_BYTES;
case GST_FORMAT_BYTES:
scale = bytes_per_sample;
/* fallthrough */
case GST_FORMAT_SAMPLES:
*dest_value = src_value * scale * mad->frame.header.samplerate / GST_SECOND;
break;
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
static gboolean
gst_mad_src_query (GstPad *pad, GstPadQueryType type,
GstFormat *format, gint64 *value)
{
gboolean res = TRUE;
GstMad *mad;
static const GstFormat formats[] = { GST_FORMAT_TIME, GST_FORMAT_BYTES };
gint i;
mad = GST_MAD (gst_pad_get_parent (pad));
switch (type) {
case GST_PAD_QUERY_TOTAL:
{
switch (*format) {
case GST_FORMAT_DEFAULT:
*format = GST_FORMAT_TIME;
/* fallthrough */
case GST_FORMAT_BYTES:
case GST_FORMAT_SAMPLES:
case GST_FORMAT_TIME:
{
res = FALSE;
for (i = 0; i < 2 && !res; i++) {
GstFormat peer_format;
gint64 peer_value;
peer_format = formats[i];
/* do the probe */
if (gst_pad_query (GST_PAD_PEER (mad->sinkpad), GST_PAD_QUERY_TOTAL,
&peer_format, &peer_value))
{
GstFormat conv_format;
/* convert to TIME */
conv_format = GST_FORMAT_TIME;
res = gst_mad_convert_sink (pad,
peer_format, peer_value,
&conv_format, value);
/* and to final format */
res &= gst_mad_convert_src (pad,
GST_FORMAT_TIME, *value,
format, value);
}
}
break;
}
default:
res = FALSE;
break;
}
break;
}
case GST_PAD_QUERY_POSITION:
switch (*format) {
case GST_FORMAT_DEFAULT:
*format = GST_FORMAT_TIME;
/* fall through */
default:
{
GstFormat time_format;
gint64 samples;
time_format = GST_FORMAT_SAMPLES;
res = gst_mad_convert_src (pad,
GST_FORMAT_TIME, mad->base_time,
&time_format, &samples);
/* we only know about our samples, convert to requested format */
res &= gst_mad_convert_src (pad,
GST_FORMAT_SAMPLES, mad->total_samples + samples,
format, value);
break;
}
}
break;
default:
res = FALSE;
break;
}
return res;
}
static gboolean
gst_mad_src_event (GstPad *pad, GstEvent *event)
{
gboolean res = TRUE;
GstMad *mad;
static const GstFormat formats[] = { GST_FORMAT_TIME, GST_FORMAT_BYTES };
gint i;
mad = GST_MAD (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
/* the all-formats seek logic */
case GST_EVENT_SEEK:
{
gint64 src_offset;
gboolean flush;
GstFormat format;
format = GST_FORMAT_TIME;
/* first bring the src_format to TIME */
if (!gst_mad_convert_src (pad,
GST_EVENT_SEEK_FORMAT (event), GST_EVENT_SEEK_OFFSET (event),
&format, &src_offset))
{
/* didn't work, probably unsupported seek format then */
res = FALSE;
break;
}
/* shave off the flush flag, we'll need it later */
flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
/* we need to break out of the processing loop on flush */
mad->restart = flush;
/* assume the worst */
res = FALSE;
/* while we did not exhaust our seek formats without result */
for (i = 0; i < 2 && !res; i++) {
gint64 desired_offset;
format = formats[i];
/* try to convert requested format to one we can seek with on the sinkpad */
if (gst_mad_convert_sink (pad, GST_FORMAT_TIME, src_offset, &format, &desired_offset))
{
GstEvent *seek_event;
/* conversion succeeded, create the seek */
seek_event = gst_event_new_seek (formats[i] | GST_SEEK_METHOD_SET | flush, desired_offset);
/* do the seek */
if (gst_pad_send_event (GST_PAD_PEER (mad->sinkpad), seek_event)) {
/* seek worked, we're done, loop will exit */
res = TRUE;
}
gst_event_free (seek_event);
}
/* at this point, either the seek worked or res == FALSE */
}
break;
}
default:
res = FALSE;
break;
}
return res;
}
static inline signed int
scale (mad_fixed_t sample)
{
/* round */
sample += (1L << (MAD_F_FRACBITS - 16));
/* clip */
if (sample >= MAD_F_ONE)
sample = MAD_F_ONE - 1;
else if (sample < -MAD_F_ONE)
sample = -MAD_F_ONE;
/* quantize */
return sample >> (MAD_F_FRACBITS + 1 - 16);
}
/* do we need this function? */
static void
gst_mad_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstMad *mad;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_MAD (object));
mad = GST_MAD (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mad_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstMad *mad;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_MAD (object));
mad = GST_MAD (object);
switch (prop_id) {
case ARG_LAYER:
g_value_set_string (value, layers[mad->header.layer]);
break;
case ARG_MODE:
g_value_set_string (value, modes[mad->header.mode]);
break;
case ARG_EMPHASIS:
g_value_set_string (value, emphases[mad->header.emphasis]);
break;
case ARG_BITRATE:
g_value_set_int (value, mad->header.bitrate);
break;
case ARG_AVERAGE_BITRATE:
g_value_set_int (value, mad->vbr_average);
break;
case ARG_SAMPLERATE:
g_value_set_int (value, mad->header.samplerate);
break;
case ARG_CHANNELS:
g_value_set_int (value, mad->channels);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mad_update_info (GstMad *mad)
{
gint abr = mad->vbr_average;
struct mad_header *header = &mad->frame.header;
#define CHECK_HEADER(h1,str) \
G_STMT_START{ \
if (mad->header.h1 != header->h1 || mad->new_header) { \
mad->header.h1 = header->h1; \
g_object_notify (G_OBJECT (mad), str); \
}; \
} G_STMT_END
g_object_freeze_notify (G_OBJECT (mad));
/* update average bitrate */
if (mad->new_header) {
mad->framecount = 1;
mad->vbr_rate = header->bitrate;
abr = 0;
} else {
mad->framecount++;
mad->vbr_rate += header->bitrate;
}
mad->vbr_average = (gint) (mad->vbr_rate / mad->framecount);
if (abr != mad->vbr_average) {
g_object_notify (G_OBJECT (mad), "average_bitrate");
}
CHECK_HEADER (layer, "layer");
CHECK_HEADER (mode, "mode");
CHECK_HEADER (emphasis, "emphasis");
CHECK_HEADER (bitrate, "bitrate");
CHECK_HEADER (samplerate, "samplerate");
if (mad->channels != MAD_NCHANNELS (header) || mad->new_header) {
mad->channels = MAD_NCHANNELS (header);
g_object_notify (G_OBJECT (mad), "channels");
}
mad->new_header = FALSE;
g_object_thaw_notify (G_OBJECT (mad));
#undef CHECK_HEADER
}
static void
gst_mad_chain (GstPad *pad, GstBuffer *buffer)
{
GstMad *mad;
gchar *data;
glong size;
mad = GST_MAD (gst_pad_get_parent (pad));
if (GST_IS_EVENT (buffer)) {
GstEvent *event = GST_EVENT (buffer);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_DISCONTINUOUS:
{
gint n = GST_EVENT_DISCONT_OFFSET_LEN (event);
gint i;
for (i=0; i<n; i++) {
if (GST_EVENT_DISCONT_OFFSET(event,i).format == GST_FORMAT_BYTES ||
GST_EVENT_DISCONT_OFFSET(event,i).format == GST_FORMAT_TIME)
{
gint64 value = GST_EVENT_DISCONT_OFFSET (event, i).value;
gint64 time;
GstFormat format;
/* see how long the input bytes take */
format = GST_FORMAT_TIME;
if (!gst_mad_convert_sink (pad,
GST_EVENT_DISCONT_OFFSET (event, i).format, value,
&format, &time))
{
time = 0;
}
mad->base_time = time;
gst_event_free (event);
event = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, time, NULL);
break;
}
}
mad->total_samples = 0;
mad->tempsize = 0;
/* we don't need to restart when we get here */
mad->restart = FALSE;
}
default:
gst_pad_event_default (pad, event);
break;
}
gst_event_free (event);
return;
}
if (GST_BUFFER_TIMESTAMP (buffer) != -1) {
mad->base_time = GST_BUFFER_TIMESTAMP (buffer);
mad->total_samples = 0;
}
/* end of new bit */
data = GST_BUFFER_DATA (buffer);
size = GST_BUFFER_SIZE (buffer);
while (size > 0) {
gint tocopy;
guchar *mad_input_buffer;
/* cut the buffer in MDLEN pieces */
tocopy = MIN (MAD_BUFFER_MDLEN, size);
memcpy (mad->tempbuffer + mad->tempsize, data, tocopy);
mad->tempsize += tocopy;
size -= tocopy;
data += tocopy;
mad_input_buffer = mad->tempbuffer;
/* if we have data we can try to proceed */
while (mad->tempsize >= 0) {
gint consumed;
guint nchannels, nsamples;
mad_fixed_t const *left_ch, *right_ch;
GstBuffer *outbuffer;
gint16 *outdata;
mad_stream_buffer (&mad->stream, mad_input_buffer, mad->tempsize);
if (mad_frame_decode (&mad->frame, &mad->stream) == -1) {
/* not enough data, need to wait for next buffer? */
if (mad->stream.error == MAD_ERROR_BUFLEN) {
break;
}
if (!MAD_RECOVERABLE (mad->stream.error)) {
gst_element_error (GST_ELEMENT (mad), "fatal error decoding stream");
return;
}
mad_frame_mute (&mad->frame);
mad_synth_mute (&mad->synth);
/* recoverable errors pass */
goto next;
}
mad_synth_frame (&mad->synth, &mad->frame);
nchannels = MAD_NCHANNELS (&mad->frame.header);
nsamples = mad->synth.pcm.length;
left_ch = mad->synth.pcm.samples[0];
right_ch = mad->synth.pcm.samples[1];
/* at this point we can accept seek events */
mad->can_seek = TRUE;
gst_mad_update_info (mad);
outbuffer = gst_buffer_new ();
outdata = (gint16 *) GST_BUFFER_DATA (outbuffer) = g_malloc (nsamples * nchannels * 2);
GST_BUFFER_SIZE (outbuffer) = nsamples * nchannels * 2;
if (mad->frame.header.samplerate == 0) {
g_warning ("mad->frame.header.samplerate is 0 !");
}
else {
GST_BUFFER_TIMESTAMP (outbuffer) = mad->base_time +
mad->total_samples * GST_SECOND / mad->frame.header.samplerate;
}
mad->total_samples += nsamples;
/* end of new bit */
while (nsamples--) {
/* output sample(s) in 16-bit signed native-endian PCM */
*outdata++ = scale(*left_ch++) & 0xffff;
if (nchannels == 2) {
*outdata++ = scale(*right_ch++) & 0xffff;
}
}
if (mad->caps_set == FALSE) {
if (!gst_pad_try_set_caps (mad->srcpad,
gst_caps_new (
"mad_src",
"audio/raw",
gst_props_new (
"format", GST_PROPS_STRING ("int"),
"law", GST_PROPS_INT (0),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"signed", GST_PROPS_BOOLEAN (TRUE),
"width", GST_PROPS_INT (16),
"depth", GST_PROPS_INT (16),
#if MAD_VERSION_MINOR <= 12
"rate", GST_PROPS_INT (mad->header.sfreq),
#else
"rate", GST_PROPS_INT (mad->header.samplerate),
#endif
"channels", GST_PROPS_INT (nchannels),
NULL)))) {
gst_element_error (GST_ELEMENT (mad), "could not set caps on source pad, aborting...");
}
mad->caps_set = TRUE;
}
if (GST_PAD_IS_CONNECTED (mad->srcpad)) {
gst_pad_push (mad->srcpad, outbuffer);
}
else {
gst_buffer_unref (outbuffer);
}
if (mad->restart) {
mad->restart = FALSE;
mad->tempsize = 0;
goto end;
}
next:
/* figure out how many bytes mad consumed */
consumed = mad->stream.next_frame - mad_input_buffer;
/* move out pointer to where mad want the next data */
mad_input_buffer += consumed;
mad->tempsize -= consumed;
}
memmove (mad->tempbuffer, mad_input_buffer, mad->tempsize);
}
end:
gst_buffer_unref (buffer);
}
static GstElementStateReturn
gst_mad_change_state (GstElement *element)
{
GstMad *mad;
mad = GST_MAD (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_PAUSED:
mad_stream_init (&mad->stream);
mad_frame_init (&mad->frame);
mad_synth_init (&mad->synth);
mad->tempsize = 0;
mad->can_seek = FALSE;
mad->total_samples = 0;
break;
case GST_STATE_PAUSED_TO_PLAYING:
/* do something to get out of the chain function faster */
break;
case GST_STATE_PLAYING_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_READY:
mad_synth_finish (&mad->synth);
mad_frame_finish (&mad->frame);
mad_stream_finish (&mad->stream);
mad->vbr_average = 0;
mad->frame.header.samplerate = 0;
mad->can_seek = FALSE;
mad->restart = TRUE;
break;
case GST_STATE_READY_TO_NULL:
break;
}
parent_class->change_state (element);
return GST_STATE_SUCCESS;
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
/* create an elementfactory for the mad element */
factory = gst_element_factory_new ("mad", GST_TYPE_MAD, &gst_mad_details);
g_return_val_if_fail (factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory,
GST_PAD_TEMPLATE_GET (mad_sink_template_factory));
gst_element_factory_add_pad_template (factory,
GST_PAD_TEMPLATE_GET (mad_src_template_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"mad",
plugin_init
};
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