gstreamer/ext/bz2/gstbz2dec.c

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/* GStreamer bz2 decoder
* Copyright (C) 2006 Lutz Müller <lutz topfrose de>
* 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 "gstbz2dec.h"
#include <gst/base/gsttypefindhelper.h>
#include <bzlib.h>
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (bz2dec_debug);
#define GST_CAT_DEFAULT bz2dec_debug
Define GstElementDetails as const and also static (when defined as global) Original commit message from CVS: * ext/amrwb/gstamrwbdec.c: * ext/amrwb/gstamrwbenc.c: * ext/amrwb/gstamrwbparse.c: * ext/arts/gst_arts.c: * ext/artsd/gstartsdsink.c: * ext/audiofile/gstafparse.c: * ext/audiofile/gstafsink.c: * ext/audiofile/gstafsrc.c: * ext/audioresample/gstaudioresample.c: * ext/bz2/gstbz2dec.c: * ext/bz2/gstbz2enc.c: * ext/cdaudio/gstcdaudio.c: * ext/directfb/dfbvideosink.c: * ext/divx/gstdivxdec.c: * ext/divx/gstdivxenc.c: * ext/dts/gstdtsdec.c: (gst_dtsdec_base_init): * ext/faac/gstfaac.c: (gst_faac_base_init): * ext/faad/gstfaad.c: * ext/gsm/gstgsmdec.c: * ext/gsm/gstgsmenc.c: * ext/hermes/gsthermescolorspace.c: * ext/ivorbis/vorbisfile.c: * ext/lcs/gstcolorspace.c: * ext/libfame/gstlibfame.c: * ext/libmms/gstmms.c: (gst_mms_base_init): * ext/musepack/gstmusepackdec.c: (gst_musepackdec_base_init): * ext/musicbrainz/gsttrm.c: (gst_musicbrainz_base_init): * ext/nas/nassink.c: (gst_nassink_base_init): * ext/neon/gstneonhttpsrc.c: * ext/sdl/sdlaudiosink.c: * ext/sdl/sdlvideosink.c: * ext/shout/gstshout.c: * ext/snapshot/gstsnapshot.c: * ext/sndfile/gstsf.c: * ext/swfdec/gstswfdec.c: * ext/tarkin/gsttarkindec.c: * ext/tarkin/gsttarkinenc.c: * ext/theora/theoradec.c: * ext/wavpack/gstwavpackdec.c: (gst_wavpack_dec_base_init): * ext/wavpack/gstwavpackparse.c: (gst_wavpack_parse_base_init): * ext/xvid/gstxviddec.c: * ext/xvid/gstxvidenc.c: * gst/cdxaparse/gstcdxaparse.c: (gst_cdxa_parse_base_init): * gst/cdxaparse/gstcdxastrip.c: (gst_cdxastrip_base_init): * gst/chart/gstchart.c: * gst/colorspace/gstcolorspace.c: * gst/deinterlace/gstdeinterlace.c: * gst/equalizer/gstiirequalizer.c: (gst_iir_equalizer_base_init): * gst/festival/gstfestival.c: * gst/filter/gstbpwsinc.c: * gst/filter/gstiir.c: * gst/filter/gstlpwsinc.c: * gst/freeze/gstfreeze.c: * gst/games/gstpuzzle.c: (gst_puzzle_base_init): * gst/librfb/gstrfbsrc.c: * gst/mixmatrix/mixmatrix.c: * gst/mpeg1sys/gstmpeg1systemencode.c: * gst/mpeg1videoparse/gstmp1videoparse.c: * gst/mpeg2sub/gstmpeg2subt.c: * gst/mpegaudioparse/gstmpegaudioparse.c: * gst/multifilesink/gstmultifilesink.c: * gst/overlay/gstoverlay.c: * gst/passthrough/gstpassthrough.c: * gst/playondemand/gstplayondemand.c: * gst/qtdemux/qtdemux.c: * gst/rtjpeg/gstrtjpegdec.c: * gst/rtjpeg/gstrtjpegenc.c: * gst/smooth/gstsmooth.c: * gst/smoothwave/gstsmoothwave.c: * gst/spectrum/gstspectrum.c: * gst/speed/gstspeed.c: * gst/stereo/gststereo.c: * gst/switch/gstswitch.c: * gst/tta/gstttadec.c: (gst_tta_dec_base_init): * gst/tta/gstttaparse.c: (gst_tta_parse_base_init): * gst/vbidec/gstvbidec.c: * gst/videocrop/gstvideocrop.c: * gst/videodrop/gstvideodrop.c: * gst/virtualdub/gstxsharpen.c: * gst/xingheader/gstxingmux.c: (gst_xing_mux_base_init): * gst/y4m/gsty4mencode.c: * sys/cdrom/gstcdplayer.c: * sys/directdraw/gstdirectdrawsink.c: * sys/directsound/gstdirectsoundsink.c: * sys/glsink/glimagesink.c: * sys/qcam/gstqcamsrc.c: * sys/v4l2/gstv4l2src.c: * sys/vcd/vcdsrc.c: (gst_vcdsrc_base_init): * sys/ximagesrc/ximagesrc.c: Define GstElementDetails as const and also static (when defined as global)
2006-04-25 21:56:38 +00:00
static const GstElementDetails bz2dec_details =
GST_ELEMENT_DETAILS ("BZ2 decoder",
"Codec/Decoder", "Decodes compressed streams",
"Lutz Mueller <lutz@users.sourceforge.net>");
static GstStaticPadTemplate sink_template =
GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-bzip"));
static GstStaticPadTemplate src_template =
GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
struct _GstBz2dec
{
GstElement parent;
/* Properties */
guint first_buffer_size;
guint buffer_size;
gboolean ready;
bz_stream stream;
guint64 offset;
};
struct _GstBz2decClass
{
GstElementClass parent_class;
};
GST_BOILERPLATE (GstBz2dec, gst_bz2dec, GstElement, GST_TYPE_ELEMENT);
#define DEFAULT_FIRST_BUFFER_SIZE 1024
#define DEFAULT_BUFFER_SIZE 1024
enum
{
PROP_0,
PROP_FIRST_BUFFER_SIZE,
PROP_BUFFER_SIZE
};
static void
gst_bz2dec_decompress_end (GstBz2dec * b)
{
g_return_if_fail (GST_IS_BZ2DEC (b));
if (b->ready) {
BZ2_bzDecompressEnd (&b->stream);
memset (&b->stream, 0, sizeof (b->stream));
b->ready = FALSE;
}
}
static void
gst_bz2dec_decompress_init (GstBz2dec * b)
{
g_return_if_fail (GST_IS_BZ2DEC (b));
gst_bz2dec_decompress_end (b);
b->offset = 0;
switch (BZ2_bzDecompressInit (&b->stream, 0, 0)) {
case BZ_OK:
b->ready = TRUE;
return;
default:
b->ready = FALSE;
GST_ELEMENT_ERROR (b, CORE, FAILED, (NULL),
("Failed to start decompression."));
return;
}
}
static GstFlowReturn
gst_bz2dec_chain (GstPad * pad, GstBuffer * in)
{
GstBz2dec *b = GST_BZ2DEC (gst_pad_get_parent (pad));
GstPad *src = gst_element_get_pad (GST_ELEMENT (b), "src");
int r = BZ_OK;
gst_object_unref (b);
gst_object_unref (src);
if (!b->ready) {
GST_ELEMENT_ERROR (b, CORE, FAILED, (NULL), ("Decompressor not ready."));
return GST_FLOW_ERROR;
}
b->stream.next_in = (char *) GST_BUFFER_DATA (in);
b->stream.avail_in = GST_BUFFER_SIZE (in);
while (r != BZ_STREAM_END) {
GstBuffer *out;
guint n;
GstFlowReturn fr;
/* Create the output buffer */
if ((fr = gst_pad_alloc_buffer (src, b->offset,
b->offset ? b->buffer_size : b->first_buffer_size,
GST_PAD_CAPS (src), &out)) != GST_FLOW_OK) {
gst_bz2dec_decompress_init (b);
return fr;
}
/* Decode */
b->stream.next_out = (char *) GST_BUFFER_DATA (out);
b->stream.avail_out = GST_BUFFER_SIZE (out);
r = BZ2_bzDecompress (&b->stream);
if ((r != BZ_OK) && (r != BZ_STREAM_END)) {
GST_ELEMENT_ERROR (b, STREAM, DECODE, (NULL),
("Failed to decompress data (error code %i).", r));
gst_bz2dec_decompress_init (b);
gst_buffer_unref (out);
return GST_FLOW_ERROR;
}
if (b->stream.avail_out >= GST_BUFFER_SIZE (out)) {
gst_buffer_unref (out);
break;
}
GST_BUFFER_SIZE (out) -= b->stream.avail_out;
GST_BUFFER_OFFSET (out) = b->stream.total_out_lo32 - GST_BUFFER_SIZE (out);
/* Configure source pad (if necessary) */
if (!b->offset) {
GstCaps *caps = NULL;
caps = gst_type_find_helper_for_buffer (GST_OBJECT (b), out, NULL);
if (caps) {
gst_buffer_set_caps (out, caps);
gst_pad_set_caps (src, caps);
gst_caps_unref (caps);
}
}
/* Push data */
n = GST_BUFFER_SIZE (out);
if ((fr = gst_pad_push (src, out)) != GST_FLOW_OK)
return fr;
b->offset += n;
}
gst_buffer_unref (in);
return GST_FLOW_OK;
}
static void
gst_bz2dec_init (GstBz2dec * b, GstBz2decClass * klass)
{
GstPad *pad;
b->first_buffer_size = DEFAULT_FIRST_BUFFER_SIZE;
b->buffer_size = DEFAULT_BUFFER_SIZE;
pad =
gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
"sink");
gst_pad_set_chain_function (pad, gst_bz2dec_chain);
gst_element_add_pad (GST_ELEMENT (b), pad);
pad =
gst_pad_new_from_template (gst_static_pad_template_get (&src_template),
"src");
gst_element_add_pad (GST_ELEMENT (b), pad);
gst_pad_use_fixed_caps (pad);
gst_bz2dec_decompress_init (b);
}
static void
gst_bz2dec_base_init (gpointer g_class)
{
GstElementClass *ec = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (ec,
gst_static_pad_template_get (&sink_template));
gst_element_class_add_pad_template (ec,
gst_static_pad_template_get (&src_template));
gst_element_class_set_details (ec, &bz2dec_details);
}
static void
gst_bz2dec_finalize (GObject * object)
{
GstBz2dec *b = GST_BZ2DEC (object);
gst_bz2dec_decompress_end (b);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_bz2dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstBz2dec *b = GST_BZ2DEC (object);
switch (prop_id) {
case PROP_BUFFER_SIZE:
g_value_set_uint (value, b->buffer_size);
break;
case PROP_FIRST_BUFFER_SIZE:
g_value_set_uint (value, b->first_buffer_size);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gst_bz2dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstBz2dec *b = GST_BZ2DEC (object);
switch (prop_id) {
case PROP_BUFFER_SIZE:
b->buffer_size = g_value_get_uint (value);
break;
case PROP_FIRST_BUFFER_SIZE:
b->first_buffer_size = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static GstStateChangeReturn
gst_bz2dec_change_state (GstElement * element, GstStateChange transition)
{
GstBz2dec *b = GST_BZ2DEC (element);
GstStateChangeReturn ret;
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret != GST_STATE_CHANGE_SUCCESS)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_bz2dec_decompress_init (b);
break;
default:
break;
}
return ret;
}
static void
gst_bz2dec_class_init (GstBz2decClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_bz2dec_change_state);
gobject_class->finalize = gst_bz2dec_finalize;
gobject_class->get_property = gst_bz2dec_get_property;
gobject_class->set_property = gst_bz2dec_set_property;
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_FIRST_BUFFER_SIZE, g_param_spec_uint ("first_buffer_size",
"Size of first buffer", "Size of first buffer (used to determine the "
"mime type of the uncompressed data)", 1, G_MAXUINT,
DEFAULT_FIRST_BUFFER_SIZE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BUFFER_SIZE,
g_param_spec_uint ("buffer_size", "Buffer size", "Buffer size",
1, G_MAXUINT, DEFAULT_BUFFER_SIZE, G_PARAM_READWRITE));
GST_DEBUG_CATEGORY_INIT (bz2dec_debug, "bz2dec", 0, "BZ2 decompressor");
}