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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 <string.h>
#include <sys/soundcard.h>
/*#define DEBUG_ENABLED */
#include "gstflacdec.h"
extern GstPadTemplate *dec_src_template, *dec_sink_template;
/* elementfactory information */
GstElementDetails flacdec_details = {
"FLAC decoder",
"Codec/Audio/Decoder",
"Decodes FLAC lossless audio streams",
VERSION,
"Wim Taymans <wim.taymans@chello.be>",
"(C) 2001",
};
/* FlacDec signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
};
static void gst_flacdec_class_init (FlacDecClass *klass);
static void gst_flacdec_init (FlacDec *flacdec);
static void gst_flacdec_loop (GstElement *element);
static void gst_flacdec_metadata_callback (const FLAC__StreamDecoder *decoder,
const FLAC__StreamMetaData *metadata,
void *client_data);
static void gst_flacdec_error_callback (const FLAC__StreamDecoder *decoder,
FLAC__StreamDecoderErrorStatus status,
void *client_data);
static FLAC__StreamDecoderReadStatus gst_flacdec_read (const FLAC__StreamDecoder *decoder,
FLAC__byte buffer[], unsigned *bytes, void *client_data);
static FLAC__StreamDecoderWriteStatus gst_flacdec_write (const FLAC__StreamDecoder *decoder,
const FLAC__Frame *frame, const FLAC__int32 *buffer[],
void *client_data);
static GstElementClass *parent_class = NULL;
/*static guint gst_flacdec_signals[LAST_SIGNAL] = { 0 }; */
GType
flacdec_get_type(void) {
static GType flacdec_type = 0;
if (!flacdec_type) {
static const GTypeInfo flacdec_info = {
sizeof(FlacDecClass),
NULL,
NULL,
(GClassInitFunc)gst_flacdec_class_init,
NULL,
NULL,
sizeof(FlacDec),
0,
(GInstanceInitFunc)gst_flacdec_init,
};
flacdec_type = g_type_register_static (GST_TYPE_ELEMENT, "FlacDec", &flacdec_info, 0);
}
return flacdec_type;
}
static void
gst_flacdec_class_init (FlacDecClass *klass)
{
GstElementClass *gstelement_class;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
}
static void
gst_flacdec_init (FlacDec *flacdec)
{
flacdec->sinkpad = gst_pad_new_from_template (dec_sink_template, "sink");
gst_element_add_pad (GST_ELEMENT (flacdec), flacdec->sinkpad);
gst_element_set_loop_function (GST_ELEMENT (flacdec), gst_flacdec_loop);
flacdec->srcpad = gst_pad_new_from_template (dec_src_template, "src");
gst_element_add_pad (GST_ELEMENT (flacdec), flacdec->srcpad);
flacdec->decoder = FLAC__stream_decoder_new ();
flacdec->offset_left = 0;
flacdec->data_left = NULL;
FLAC__stream_decoder_set_read_callback (flacdec->decoder, gst_flacdec_read);
FLAC__stream_decoder_set_write_callback (flacdec->decoder, gst_flacdec_write);
FLAC__stream_decoder_set_metadata_callback (flacdec->decoder, gst_flacdec_metadata_callback);
FLAC__stream_decoder_set_error_callback (flacdec->decoder, gst_flacdec_error_callback);
FLAC__stream_decoder_set_client_data (flacdec->decoder, flacdec);
FLAC__stream_decoder_init (flacdec->decoder);
}
static void
gst_flacdec_metadata_callback (const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
{
}
static void
gst_flacdec_error_callback (const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
{
}
static FLAC__StreamDecoderReadStatus
gst_flacdec_read (const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data)
{
FlacDec *flacdec;
GstBuffer *inbuf = NULL;
gint insize;
guchar *indata;
flacdec = GST_FLACDEC (client_data);
if (flacdec->data_left == NULL) {
inbuf = gst_pad_pull (flacdec->sinkpad);
insize = GST_BUFFER_SIZE (inbuf);
indata = GST_BUFFER_DATA (inbuf);
}
else {
inbuf = flacdec->data_left;
insize = GST_BUFFER_SIZE (inbuf) - flacdec->offset_left;
indata = GST_BUFFER_DATA (inbuf) + flacdec->offset_left;
}
if (*bytes < insize) {
/* we have more than we can handle */
flacdec->data_left = inbuf;
flacdec->offset_left += *bytes;
inbuf = NULL;
}
else {
flacdec->data_left = NULL;
flacdec->offset_left = 0;
*bytes = insize;
}
memcpy (buffer, indata, *bytes);
if (inbuf)
gst_buffer_unref (inbuf);
return FLAC__STREAM_DECODER_READ_CONTINUE;
}
static FLAC__StreamDecoderWriteStatus
gst_flacdec_write (const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data)
{
FlacDec *flacdec;
GstBuffer *outbuf;
guint depth = frame->header.bits_per_sample;
guint channels = frame->header.channels;
guint samples = frame->header.blocksize;
guint j, i;
flacdec = GST_FLACDEC (client_data);
if (!GST_PAD_CAPS (flacdec->srcpad)) {
gst_pad_try_set_caps (flacdec->srcpad,
GST_CAPS_NEW (
"flac_caps",
"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 (depth),
"depth", GST_PROPS_INT (depth),
"rate", GST_PROPS_INT (frame->header.sample_rate),
"channels", GST_PROPS_INT (channels)
));
}
outbuf = gst_buffer_new ();
GST_BUFFER_SIZE (outbuf) = samples * channels * ((depth+7)>>3);
GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
if (depth == 8) {
guint8 *outbuffer = (guint8 *)GST_BUFFER_DATA (outbuf);
for (i=0; i<samples; i++) {
for (j=0; j < channels; j++) {
*outbuffer++ = (guint8) buffer[j][i];
}
}
}
else if (depth == 16) {
guint16 *outbuffer = (guint16 *)GST_BUFFER_DATA (outbuf);
for (i=0; i<samples; i++) {
for (j=0; j < channels; j++) {
*outbuffer++ = (guint16) buffer[j][i];
}
}
}
else {
g_warning ("flacdec: invalid depth %d found\n", depth);
return FLAC__STREAM_DECODER_WRITE_ABORT;
}
gst_pad_push (flacdec->srcpad, outbuf);
return FLAC__STREAM_DECODER_WRITE_CONTINUE;
}
static void
gst_flacdec_loop (GstElement *element)
{
FlacDec *flacdec;
flacdec = GST_FLACDEC (element);
if (FLAC__stream_decoder_get_state (flacdec->decoder) == FLAC__STREAM_DECODER_SEARCH_FOR_METADATA) {
FLAC__stream_decoder_process_metadata (flacdec->decoder);
}
FLAC__stream_decoder_process_one_frame (flacdec->decoder);
}
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