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gstreamer/gst/wavparse/gstwavparse.c
Benjamin Otte 302cf767d9 fix to new plugin system 
Original commit message from CVS:
fix to new plugin system
2003-11-02 19:28:08 +00:00

1134 lines
31 KiB
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/* -*- Mode: C; tab-width: 2; indent-tabs-mode: t; c-basic-offset: 2 -*- */
/* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <gstwavparse.h>
static void gst_wavparse_base_init (gpointer g_class);
static void gst_wavparse_class_init (GstWavParseClass *klass);
static void gst_wavparse_init (GstWavParse *wavparse);
static GstElementStateReturn
gst_wavparse_change_state (GstElement *element);
static const GstFormat* gst_wavparse_get_formats (GstPad *pad);
static const GstQueryType *
gst_wavparse_get_query_types (GstPad *pad);
static gboolean gst_wavparse_pad_query (GstPad *pad,
GstQueryType type,
GstFormat *format,
gint64 *value);
static gboolean gst_wavparse_pad_convert (GstPad *pad,
GstFormat src_format,
gint64 src_value,
GstFormat *dest_format,
gint64 *dest_value);
static void gst_wavparse_loop (GstElement *element);
static const GstEventMask*
gst_wavparse_get_event_masks (GstPad *pad);
static gboolean gst_wavparse_srcpad_event (GstPad *pad, GstEvent *event);
static void gst_wavparse_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
/* elementfactory information */
static GstElementDetails gst_wavparse_details = GST_ELEMENT_DETAILS (
".wav parser",
"Codec/Parser",
"Parse a .wav file into raw audio",
"Erik Walthinsen <omega@cse.ogi.edu>"
);
GST_PAD_TEMPLATE_FACTORY (sink_template_factory,
"wavparse_sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"wavparse_wav",
"audio/x-wav",
NULL
)
)
GST_PAD_TEMPLATE_FACTORY (src_template_factory,
"wavparse_src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"wavparse_raw",
"audio/x-raw-int",
"endianness", GST_PROPS_INT (G_LITTLE_ENDIAN),
"signed", GST_PROPS_LIST (
GST_PROPS_BOOLEAN (FALSE),
GST_PROPS_BOOLEAN (TRUE)
),
"width", GST_PROPS_LIST (
GST_PROPS_INT (8),
GST_PROPS_INT (16)
),
"depth", GST_PROPS_LIST (
GST_PROPS_INT (8),
GST_PROPS_INT (16)
),
"rate", GST_PROPS_INT_RANGE (8000, 48000),
"channels", GST_PROPS_INT_RANGE (1, 2)
),
GST_CAPS_NEW (
"wavparse_mpeg",
"audio/mpeg",
"rate", GST_PROPS_INT_RANGE (8000, 48000),
"channels", GST_PROPS_INT_RANGE (1, 2),
"layer", GST_PROPS_INT_RANGE (1, 3)
),
GST_CAPS_NEW (
"parsewav_law",
"audio/x-alaw",
"rate", GST_PROPS_INT_RANGE (8000, 48000),
"channels", GST_PROPS_INT_RANGE (1, 2)
),
GST_CAPS_NEW (
"parsewav_law",
"audio/x-mulaw",
"rate", GST_PROPS_INT_RANGE (8000, 48000),
"channels", GST_PROPS_INT_RANGE (1, 2)
)
)
/* WavParse signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
PROP_0,
PROP_METADATA
};
static GstElementClass *parent_class = NULL;
/*static guint gst_wavparse_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_wavparse_get_type (void)
{
static GType wavparse_type = 0;
if (!wavparse_type) {
static const GTypeInfo wavparse_info = {
sizeof(GstWavParseClass),
gst_wavparse_base_init,
NULL,
(GClassInitFunc) gst_wavparse_class_init,
NULL,
NULL,
sizeof(GstWavParse),
0,
(GInstanceInitFunc) gst_wavparse_init,
};
wavparse_type = g_type_register_static (GST_TYPE_ELEMENT, "GstWavParse", &wavparse_info, 0);
}
return wavparse_type;
}
static void
gst_wavparse_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_wavparse_details);
/* register src pads */
gst_element_class_add_pad_template (element_class, GST_PAD_TEMPLATE_GET (sink_template_factory));
gst_element_class_add_pad_template (element_class, GST_PAD_TEMPLATE_GET (src_template_factory));
}
static void
gst_wavparse_class_init (GstWavParseClass *klass)
{
GstElementClass *gstelement_class;
GObjectClass *object_class;
gstelement_class = (GstElementClass*) klass;
object_class = (GObjectClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
object_class->get_property = gst_wavparse_get_property;
gstelement_class->change_state = gst_wavparse_change_state;
g_object_class_install_property (object_class, PROP_METADATA,
g_param_spec_boxed ("metadata",
"Metadata", "Metadata",
GST_TYPE_CAPS,
G_PARAM_READABLE));
}
static void
gst_wavparse_init (GstWavParse *wavparse)
{
GstProps *props;
/* sink */
wavparse->sinkpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (sink_template_factory), "sink");
gst_element_add_pad (GST_ELEMENT (wavparse), wavparse->sinkpad);
gst_pad_set_formats_function (wavparse->sinkpad, gst_wavparse_get_formats);
gst_pad_set_convert_function (wavparse->sinkpad, gst_wavparse_pad_convert);
gst_pad_set_query_type_function (wavparse->sinkpad,
gst_wavparse_get_query_types);
gst_pad_set_query_function (wavparse->sinkpad, gst_wavparse_pad_query);
/* source */
wavparse->srcpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (src_template_factory), "src");
gst_element_add_pad (GST_ELEMENT (wavparse), wavparse->srcpad);
gst_pad_set_formats_function (wavparse->srcpad, gst_wavparse_get_formats);
gst_pad_set_convert_function (wavparse->srcpad, gst_wavparse_pad_convert);
gst_pad_set_query_type_function (wavparse->srcpad,
gst_wavparse_get_query_types);
gst_pad_set_query_function (wavparse->srcpad, gst_wavparse_pad_query);
gst_pad_set_event_function (wavparse->srcpad, gst_wavparse_srcpad_event);
gst_pad_set_event_mask_function (wavparse->srcpad, gst_wavparse_get_event_masks);
gst_element_set_loop_function (GST_ELEMENT (wavparse), gst_wavparse_loop);
wavparse->state = GST_WAVPARSE_UNKNOWN;
wavparse->bps = 0;
wavparse->seek_pending = FALSE;
wavparse->seek_offset = 0;
props = gst_props_empty_new ();
/* Metadata is added later when we find it */
gst_caps_replace_sink (&wavparse->metadata,
gst_caps_new ("wav_metadata",
"application/x-gst-metadata",
props));
}
static void
gst_wavparse_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GstWavParse *wavparse;
wavparse = GST_WAVPARSE (object);
switch (prop_id) {
case PROP_METADATA:
g_value_set_boxed (value, wavparse->metadata);
break;
default:
break;
}
}
static void
gst_wavparse_parse_adtl (GstWavParse *wavparse,
int len)
{
guint32 got_bytes;
GstByteStream *bs = wavparse->bs;
gst_riff_chunk *temp_chunk, chunk;
guint8 *tempdata;
struct _gst_riff_labl labl, *temp_labl;
struct _gst_riff_ltxt ltxt, *temp_ltxt;
struct _gst_riff_note note, *temp_note;
char *label_name;
GstProps *props;
GstPropsEntry *entry;
GstCaps *new_caps;
GList *caps = NULL;
props = wavparse->metadata->properties;
while (len > 0) {
got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (gst_riff_chunk));
if (got_bytes != sizeof (gst_riff_chunk)) {
return;
}
temp_chunk = (gst_riff_chunk *) tempdata;
chunk.id = GUINT32_FROM_LE (temp_chunk->id);
chunk.size = GUINT32_FROM_LE (temp_chunk->size);
if (chunk.size == 0) {
gst_bytestream_flush (bs, sizeof (gst_riff_chunk));
len -= sizeof (gst_riff_chunk);
continue;
}
switch (chunk.id) {
case GST_RIFF_adtl_labl:
got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (struct _gst_riff_labl));
if (got_bytes != sizeof (struct _gst_riff_labl)) {
return;
}
temp_labl = (struct _gst_riff_labl *) tempdata;
labl.id = GUINT32_FROM_LE (temp_labl->id);
labl.size = GUINT32_FROM_LE (temp_labl->size);
labl.identifier = GUINT32_FROM_LE (temp_labl->identifier);
gst_bytestream_flush (bs, sizeof (struct _gst_riff_labl));
len -= sizeof (struct _gst_riff_labl);
got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, labl.size - 4);
if (got_bytes != labl.size - 4) {
return;
}
label_name = (char *) tempdata;
gst_bytestream_flush (bs, ((labl.size - 4) + 1) & ~1);
len -= (( (labl.size - 4) + 1) & ~1);
new_caps = gst_caps_new ("label",
"application/x-gst-metadata",
gst_props_new (
"identifier", GST_PROPS_INT (labl.identifier),
"name", GST_PROPS_STRING (label_name),
NULL));
if (gst_props_get (props, "labels", &caps, NULL)) {
caps = g_list_append (caps, new_caps);
} else {
caps = g_list_append (NULL, new_caps);
entry = gst_props_entry_new ("labels", GST_PROPS_GLIST (caps));
gst_props_add_entry (props, entry);
}
break;
case GST_RIFF_adtl_ltxt:
got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (struct _gst_riff_ltxt));
if (got_bytes != sizeof (struct _gst_riff_ltxt)) {
return;
}
temp_ltxt = (struct _gst_riff_ltxt *) tempdata;
ltxt.id = GUINT32_FROM_LE (temp_ltxt->id);
ltxt.size = GUINT32_FROM_LE (temp_ltxt->size);
ltxt.identifier = GUINT32_FROM_LE (temp_ltxt->identifier);
ltxt.length = GUINT32_FROM_LE (temp_ltxt->length);
ltxt.purpose = GUINT32_FROM_LE (temp_ltxt->purpose);
ltxt.country = GUINT16_FROM_LE (temp_ltxt->country);
ltxt.language = GUINT16_FROM_LE (temp_ltxt->language);
ltxt.dialect = GUINT16_FROM_LE (temp_ltxt->dialect);
ltxt.codepage = GUINT16_FROM_LE (temp_ltxt->codepage);
gst_bytestream_flush (bs, sizeof (struct _gst_riff_ltxt));
len -= sizeof (struct _gst_riff_ltxt);
if (ltxt.size - 20 > 0) {
got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, ltxt.size - 20);
if (got_bytes != ltxt.size - 20) {
return;
}
gst_bytestream_flush (bs, ((ltxt.size - 20) + 1) & ~1);
len -= (( (ltxt.size - 20) + 1) & ~1);
label_name = (char *) tempdata;
} else {
label_name = "";
}
new_caps = gst_caps_new ("ltxt",
"application/x-gst-metadata",
gst_props_new (
"identifier", GST_PROPS_INT (ltxt.identifier),
"name", GST_PROPS_STRING (label_name),
"length", GST_PROPS_INT (ltxt.length),
NULL));
if (gst_props_get (props, "ltxts", &caps, NULL)) {
caps = g_list_append (caps, new_caps);
} else {
caps = g_list_append (NULL, new_caps);
entry = gst_props_entry_new ("ltxts", GST_PROPS_GLIST (caps));
gst_props_add_entry (props, entry);
}
break;
case GST_RIFF_adtl_note:
got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (struct _gst_riff_note));
if (got_bytes != sizeof (struct _gst_riff_note)) {
return;
}
temp_note = (struct _gst_riff_note *) tempdata;
note.id = GUINT32_FROM_LE (temp_note->id);
note.size = GUINT32_FROM_LE (temp_note->size);
note.identifier = GUINT32_FROM_LE (temp_note->identifier);
gst_bytestream_flush (bs, sizeof (struct _gst_riff_note));
len -= sizeof (struct _gst_riff_note);
got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, note.size - 4);
if (got_bytes != note.size - 4) {
return;
}
gst_bytestream_flush (bs, ((note.size - 4) + 1) & ~1);
len -= (( (note.size - 4) + 1) & ~1);
label_name = (char *) tempdata;
new_caps = gst_caps_new ("note",
"application/x-gst-metadata",
gst_props_new (
"identifier", GST_PROPS_INT (note.identifier),
"name", GST_PROPS_STRING (label_name),
NULL));
if (gst_props_get (props, "notes", &caps, NULL)) {
caps = g_list_append (caps, new_caps);
} else {
caps = g_list_append (NULL, new_caps);
entry = gst_props_entry_new ("notes", GST_PROPS_GLIST (caps));
gst_props_add_entry (props, entry);
}
break;
default:
g_print ("Unknown chunk: " GST_FOURCC_FORMAT "\n", GST_FOURCC_ARGS(chunk.id));
return;
}
}
}
static void
gst_wavparse_parse_info (GstWavParse *wavparse,
int len)
{
gst_riff_chunk *temp_chunk, chunk;
GstByteStream *bs = wavparse->bs;
guint8 *tempdata;
guint32 got_bytes;
char *name, *type;
while (len > 0) {
got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (gst_riff_chunk));
temp_chunk = (gst_riff_chunk *) tempdata;
chunk.id = GUINT32_FROM_LE (temp_chunk->id);
chunk.size = GUINT32_FROM_LE (temp_chunk->size);
gst_bytestream_flush (bs, sizeof (gst_riff_chunk));
if (got_bytes != sizeof (gst_riff_chunk)) {
return;
}
/* move our pointer on past the header */
len -= sizeof (gst_riff_chunk);
if (chunk.size == 0) {
continue;
}
got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, chunk.size);
name = (char *) tempdata;
if (got_bytes != chunk.size) {
return;
}
/* move our pointer on past the data ... on an even boundary */
gst_bytestream_flush (bs, (chunk.size + 1) & ~1);
len -= ((chunk.size + 1) & ~1);
/* We now have an info string in 'name' of type chunk.id
- find type */
switch (chunk.id) {
case GST_RIFF_INFO_IARL:
type = "Location";
break;
case GST_RIFF_INFO_IART:
type = "Artist";
break;
case GST_RIFF_INFO_ICMS:
type = "Commissioner";
break;
case GST_RIFF_INFO_ICMT:
type = "Comment";
break;
case GST_RIFF_INFO_ICOP:
type = "Copyright";
break;
case GST_RIFF_INFO_ICRD:
type = "Creation Date";
break;
case GST_RIFF_INFO_IENG:
type = "Engineer";
break;
case GST_RIFF_INFO_IGNR:
type = "Genre";
break;
case GST_RIFF_INFO_IKEY:
type = "Keywords";
break;
case GST_RIFF_INFO_INAM:
type = "Title"; /* name */
break;
case GST_RIFF_INFO_IPRD:
type = "Product";
break;
case GST_RIFF_INFO_ISBJ:
type = "Subject";
break;
case GST_RIFF_INFO_ISFT:
type = "Software";
break;
case GST_RIFF_INFO_ITCH:
type = "Technician";
break;
default:
g_print ("Unknown: %4.4s\n", (char *) &chunk.id);
type = NULL;
break;
}
if (type) {
GstPropsEntry *entry;
entry = gst_props_entry_new (type, GST_PROPS_STRING (name));
gst_props_add_entry (wavparse->metadata->properties, entry);
}
}
g_object_notify (G_OBJECT (wavparse), "metadata");
}
static void
gst_wavparse_parse_cues (GstWavParse *wavparse,
int len)
{
guint32 got_bytes;
GstByteStream *bs = wavparse->bs;
struct _gst_riff_cue *temp_cue, cue;
struct _gst_riff_cuepoints *points;
guint8 *tempdata;
int i;
GList *cues = NULL;
GstPropsEntry *entry;
while (len > 0) {
got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (struct _gst_riff_cue));
temp_cue = (struct _gst_riff_cue *) tempdata;
/* fixup for our big endian friends */
cue.id = GUINT32_FROM_LE (temp_cue->id);
cue.size = GUINT32_FROM_LE (temp_cue->size);
cue.cuepoints = GUINT32_FROM_LE (temp_cue->cuepoints);
gst_bytestream_flush (bs, sizeof (struct _gst_riff_cue));
if (got_bytes != sizeof (struct _gst_riff_cue)) {
return;
}
len -= sizeof (struct _gst_riff_cue);
/* -4 because cue.size contains the cuepoints size
and we've already flushed that out of the system */
got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, cue.size - 4);
gst_bytestream_flush (bs, ((cue.size - 4) + 1) & ~1);
if (got_bytes != cue.size - 4) {
return;
}
len -= ( ((cue.size - 4) + 1) & ~1);
/* now we have an array of struct _gst_riff_cuepoints in tempdata */
points = (struct _gst_riff_cuepoints *) tempdata;
for (i = 0; i < cue.cuepoints; i++) {
GstCaps *caps;
caps = gst_caps_new ("cues",
"application/x-gst-metadata",
gst_props_new (
"identifier", GST_PROPS_INT (points[i].identifier),
"position", GST_PROPS_INT (points[i].offset),
NULL));
cues = g_list_append (cues, caps);
}
entry = gst_props_entry_new ("cues", GST_PROPS_GLIST (cues));
gst_props_add_entry (wavparse->metadata->properties, entry);
}
g_object_notify (G_OBJECT (wavparse), "metadata");
}
static void
gst_wavparse_parse_fmt (GstWavParse *wavparse)
{
GstWavParseFormat *format;
GstCaps *caps = NULL;
guint8 *fmtdata;
GstByteStream *bs = wavparse->bs;
guint32 got_bytes;
got_bytes = gst_bytestream_peek_bytes (bs, &fmtdata, sizeof (GstWavParseFormat));
format = (GstWavParseFormat *) fmtdata;
if (got_bytes == sizeof (GstWavParseFormat)) {
gst_bytestream_flush (bs, got_bytes);
wavparse->bps = GUINT16_FROM_LE (format->wBlockAlign);
wavparse->rate = GUINT32_FROM_LE (format->dwSamplesPerSec);
wavparse->channels = GUINT16_FROM_LE (format->wChannels);
wavparse->width = GUINT16_FROM_LE (format->wBitsPerSample);
wavparse->format = GINT16_FROM_LE (format->wFormatTag);
/* set the caps on the src pad */
/* FIXME: handle all of the other formats as well */
switch (wavparse->format) {
case GST_RIFF_WAVE_FORMAT_ALAW:
case GST_RIFF_WAVE_FORMAT_MULAW: {
char *mime = (wavparse->format == GST_RIFF_WAVE_FORMAT_ALAW) ?
"audio/x-alaw" : "audio/x-mulaw";
if (wavparse->width != 8) {
g_warning ("Ignoring invalid width %d", wavparse->width);
return;
}
caps = GST_CAPS_NEW ("parsewav_src",
mime,
"rate", GST_PROPS_INT (wavparse->rate),
"channels", GST_PROPS_INT (wavparse->channels)
);
}
case GST_RIFF_WAVE_FORMAT_PCM:
caps = GST_CAPS_NEW ("parsewav_src",
"audio/x-raw-int",
"endianness", GST_PROPS_INT (G_LITTLE_ENDIAN),
"signed", GST_PROPS_BOOLEAN ((wavparse->width > 8) ? TRUE : FALSE),
"width", GST_PROPS_INT (wavparse->width),
"depth", GST_PROPS_INT (wavparse->width),
"rate", GST_PROPS_INT (wavparse->rate),
"channels", GST_PROPS_INT (wavparse->channels)
);
break;
case GST_RIFF_WAVE_FORMAT_MPEGL12:
case GST_RIFF_WAVE_FORMAT_MPEGL3: {
int layer = (wavparse->format == GST_RIFF_WAVE_FORMAT_MPEGL12) ? 2 : 3;
caps = GST_CAPS_NEW ("parsewav_src",
"audio/mpeg",
"layer", GST_PROPS_INT (layer),
"rate", GST_PROPS_INT (wavparse->rate),
"channels", GST_PROPS_INT (wavparse->channels)
);
}
break;
default:
gst_element_error (GST_ELEMENT (wavparse), "wavparse: format %d not handled", wavparse->format);
return;
}
if (gst_pad_try_set_caps (wavparse->srcpad, caps) <= 0) {
gst_element_error (GST_ELEMENT (wavparse), "Could not set caps");
return;
}
GST_DEBUG ("frequency %d, channels %d",
wavparse->rate, wavparse->channels);
}
}
static gboolean
gst_wavparse_handle_sink_event (GstWavParse *wavparse)
{
guint32 remaining;
GstEvent *event;
GstEventType type;
gboolean res = TRUE;
gst_bytestream_get_status (wavparse->bs, &remaining, &event);
type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
GST_DEBUG ("wavparse: event %p %d", event, type);
switch (type) {
case GST_EVENT_EOS:
gst_bytestream_flush (wavparse->bs, remaining);
gst_pad_event_default (wavparse->sinkpad, event);
res = FALSE;
goto done;
case GST_EVENT_FLUSH:
g_warning ("Wavparse: Flush event");
break;
default:
g_warning ("Wavparse: Unhandled event %d", type);
break;
}
gst_event_unref (event);
done:
return res;
}
static void
gst_wavparse_loop (GstElement *element)
{
GstWavParse *wavparse;
gst_riff_riff chunk;
guint32 flush = 0;
guint32 got_bytes;
GstByteStream *bs;
wavparse = GST_WAVPARSE (element);
bs = wavparse->bs;
if (wavparse->seek_pending) {
GST_DEBUG ("wavparse: seek pending to %" G_GINT64_FORMAT " %08llx",
wavparse->seek_offset,
(unsigned long long) wavparse->seek_offset);
if (!gst_bytestream_seek (bs, wavparse->seek_offset, GST_SEEK_METHOD_SET)) {
GST_INFO ("wavparse: Could not seek");
}
wavparse->seek_pending = FALSE;
}
if (wavparse->state == GST_WAVPARSE_DATA) {
GstBuffer *buf;
int desired;
/* This seems to want the whole chunk,
Will this screw up streaming?
Does anyone care about streaming wavs?
FIXME: Should we have a decent buffer size? */
#define MAX_BUFFER_SIZE 1024
if (wavparse->dataleft > 0) {
desired = MIN (wavparse->dataleft, MAX_BUFFER_SIZE);
got_bytes = gst_bytestream_peek (bs, &buf, desired);
if (got_bytes == 0) {
return;
}
wavparse->dataleft -= got_bytes;
wavparse->byteoffset += got_bytes;
gst_bytestream_flush (bs, got_bytes);
gst_pad_push (wavparse->srcpad, GST_DATA (buf));
return;
} else {
wavparse->state = GST_WAVPARSE_OTHER;
}
}
do {
gst_riff_riff *temp_chunk;
guint8 *tempdata;
guint32 skipsize;
/* read first two dwords to get chunktype and size */
while (TRUE) {
got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (gst_riff_chunk));
temp_chunk = (gst_riff_riff *) tempdata;
if (got_bytes < sizeof (gst_riff_chunk)) {
if (!gst_wavparse_handle_sink_event (wavparse)) {
return;
}
} else {
break;
}
}
chunk.id = GUINT32_FROM_LE (temp_chunk->id);
chunk.size = GUINT32_FROM_LE (temp_chunk->size);
switch (chunk.id) {
case GST_RIFF_TAG_RIFF:
case GST_RIFF_TAG_LIST:
/* Read complete list chunk */
while (TRUE) {
got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (gst_riff_list));
temp_chunk = (gst_riff_riff *) tempdata;
if (got_bytes < sizeof (gst_riff_list)) {
if (!gst_wavparse_handle_sink_event (wavparse)) {
return;
}
} else {
break;
}
}
chunk.type = GUINT32_FROM_LE (temp_chunk->type);
skipsize = sizeof (gst_riff_list);
break;
default:
skipsize = sizeof (gst_riff_chunk);
break;
}
gst_bytestream_flush (bs, skipsize);
} while (FALSE);
/* need to flush an even number of bytes at the end */
flush = (chunk.size + 1) & ~1;
switch (wavparse->state) {
case GST_WAVPARSE_START:
if (chunk.id != GST_RIFF_TAG_RIFF &&
chunk.type != GST_RIFF_RIFF_WAVE) {
gst_element_error (element, "This doesn't appear to be a WAV file %08x %08x", chunk.id, chunk.type);
return;
}
wavparse->state = GST_WAVPARSE_OTHER;
/* We are not going to flush lists */
flush = 0;
break;
case GST_WAVPARSE_OTHER:
GST_DEBUG ("riff tag: %4.4s %08x", (char *) &chunk.id, chunk.size);
switch (chunk.id) {
case GST_RIFF_TAG_data:
wavparse->state = GST_WAVPARSE_DATA;
wavparse->dataleft = chunk.size;
wavparse->byteoffset = 0;
flush = 0;
break;
case GST_RIFF_TAG_fmt:
gst_wavparse_parse_fmt (wavparse);
break;
case GST_RIFF_TAG_cue:
gst_wavparse_parse_cues (wavparse, chunk.size);
break;
case GST_RIFF_TAG_LIST:
GST_DEBUG ("list type: %4.4s", (char *) &chunk.type);
switch (chunk.type) {
case GST_RIFF_LIST_INFO:
gst_wavparse_parse_info (wavparse, chunk.size - 4);
flush = 0;
break;
case GST_RIFF_LIST_adtl:
gst_wavparse_parse_adtl (wavparse, chunk.size - 4);
flush = 0;
break;
default:
flush = 0;
break;
}
flush = 0;
break;
}
case GST_WAVPARSE_DATA:
/* Should have been handled up there ^^^^ */
flush = 0;
break;
default:
/* Unknown */
GST_DEBUG (" ***** unknown chunkid %08x", chunk.id);
break;
}
if (flush > 0) {
gboolean res;
res = gst_bytestream_flush (bs, flush);
if (!res) {
guint32 remaining;
GstEvent *event;
gst_bytestream_get_status (bs, &remaining, &event);
gst_event_unref (event);
}
}
}
/* convert and query stuff */
static const GstFormat *
gst_wavparse_get_formats (GstPad *pad)
{
static GstFormat formats[] = {
GST_FORMAT_TIME,
GST_FORMAT_BYTES,
GST_FORMAT_DEFAULT, /* a "frame", ie a set of samples per Hz */
0,
0
};
return formats;
}
static gboolean
gst_wavparse_pad_convert (GstPad *pad,
GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
gint bytes_per_sample;
glong byterate;
GstWavParse *wavparse;
wavparse = GST_WAVPARSE (gst_pad_get_parent (pad));
bytes_per_sample = wavparse->channels * wavparse->width / 8;
if (bytes_per_sample == 0) {
GST_DEBUG ("bytes_per_sample is 0, probably an mp3 - channels %d, width %d\n",
wavparse->channels, wavparse->width);
return FALSE;
}
byterate = (glong) (bytes_per_sample * wavparse->rate);
if (byterate == 0) {
g_warning ("byterate is 0, internal error\n");
return FALSE;
}
GST_DEBUG ("bytes per sample: %d\n", bytes_per_sample);
switch (src_format) {
case GST_FORMAT_BYTES:
if (*dest_format == GST_FORMAT_DEFAULT)
*dest_value = src_value / bytes_per_sample;
else if (*dest_format == GST_FORMAT_TIME)
*dest_value = src_value * GST_SECOND / byterate;
else
return FALSE;
break;
case GST_FORMAT_DEFAULT:
if (*dest_format == GST_FORMAT_BYTES)
*dest_value = src_value * bytes_per_sample;
else if (*dest_format == GST_FORMAT_TIME)
*dest_value = src_value * GST_SECOND / wavparse->rate;
else
return FALSE;
break;
case GST_FORMAT_TIME:
if (*dest_format == GST_FORMAT_BYTES)
*dest_value = src_value * byterate / GST_SECOND;
else if (*dest_format == GST_FORMAT_DEFAULT)
*dest_value = src_value * wavparse->rate / GST_SECOND;
else
return FALSE;
*dest_value = *dest_value & ~(bytes_per_sample - 1);
break;
default:
g_warning ("unhandled format for wavparse\n");
break;
}
return TRUE;
}
static const GstQueryType *
gst_wavparse_get_query_types (GstPad *pad)
{
static const GstQueryType types[] = {
GST_QUERY_TOTAL,
GST_QUERY_POSITION,
0
};
return types;
}
/* handle queries for location and length in requested format */
static gboolean
gst_wavparse_pad_query (GstPad *pad, GstQueryType type,
GstFormat *format, gint64 *value)
{
GstFormat peer_format = GST_FORMAT_BYTES;
gint64 peer_value;
GstWavParse *wavparse;
/* probe sink's peer pad, convert value, and that's it :) */
/* FIXME: ideally we'd loop over possible formats of peer instead
* of only using BYTE */
wavparse = GST_WAVPARSE (gst_pad_get_parent (pad));
if (!gst_pad_query (GST_PAD_PEER (wavparse->sinkpad), type,
&peer_format, &peer_value)) {
g_warning ("Could not query sink pad's peer\n");
return FALSE;
}
if (!gst_pad_convert (wavparse->sinkpad, peer_format, peer_value,
format, value)) {
g_warning ("Could not query sink pad's peer\n");
return FALSE;
}
GST_DEBUG ("pad_query done, value %" G_GINT64_FORMAT "\n", *value);
return TRUE;
}
static const GstEventMask*
gst_wavparse_get_event_masks (GstPad *pad)
{
static const GstEventMask gst_wavparse_src_event_masks[] = {
{ GST_EVENT_SEEK, GST_SEEK_METHOD_SET |
GST_SEEK_FLAG_FLUSH },
{ 0, }
};
return gst_wavparse_src_event_masks;
}
static gboolean
gst_wavparse_srcpad_event (GstPad *pad, GstEvent *event)
{
#if 0
GstWavParse *wavparse = GST_WAVPARSE (GST_PAD_PARENT (pad));
gboolean res = FALSE;
GST_DEBUG ("event %d", GST_EVENT_TYPE (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
gint64 byteoffset;
GstFormat format;
/* we can only seek when in the DATA state */
if (wavparse->state != GST_WAVPARSE_DATA) {
return FALSE;
}
format = GST_FORMAT_BYTES;
/* bring format to bytes for the peer element,
* FIXME be smarter here */
res = gst_pad_convert (pad,
GST_EVENT_SEEK_FORMAT (event),
GST_EVENT_SEEK_OFFSET (event),
&format,
&byteoffset);
if (res) {
/* ok, seek worked, update our state */
wavparse->seek_offset = byteoffset;
wavparse->seek_pending = TRUE;
wavparse->need_discont = TRUE;
}
break;
}
default:
break;
}
gst_event_unref (event);
return res;
#else
return FALSE;
#endif
}
static GstElementStateReturn
gst_wavparse_change_state (GstElement *element)
{
GstWavParse *wavparse = GST_WAVPARSE (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_PAUSED:
wavparse->bs = gst_bytestream_new (wavparse->sinkpad);
wavparse->state = GST_WAVPARSE_START;
break;
case GST_STATE_PAUSED_TO_PLAYING:
break;
case GST_STATE_PLAYING_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_READY:
gst_bytestream_destroy (wavparse->bs);
wavparse->state = GST_WAVPARSE_UNKNOWN;
wavparse->bps = 0;
wavparse->seek_pending = FALSE;
wavparse->seek_offset = 0;
gst_caps_replace (&wavparse->metadata, NULL);
break;
case GST_STATE_READY_TO_NULL:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
static gboolean
plugin_init (GstPlugin *plugin)
{
if (!gst_library_load ("gstbytestream")) {
return FALSE;
}
return gst_element_register (plugin, "wavparse", GST_RANK_SECONDARY, GST_TYPE_WAVPARSE);
}
GST_PLUGIN_DEFINE (
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"wavparse",
"Parse a .wav file into raw audio",
plugin_init,
VERSION,
GST_LICENSE,
GST_COPYRIGHT,
GST_PACKAGE,
GST_ORIGIN
)
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