mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
Original commit message from CVS: * ext/aalib/gstaasink.c: * ext/annodex/gstcmmldec.c: * ext/annodex/gstcmmlenc.c: * ext/cairo/gsttextoverlay.c: * ext/cairo/gsttimeoverlay.c: * ext/cdio/gstcdiocddasrc.c: * ext/dv/gstdvdec.c: * ext/dv/gstdvdemux.c: * ext/esd/esdmon.c: * ext/esd/esdsink.c: * ext/flac/gstflacenc.c: * ext/flac/gstflactag.c: * ext/gconf/gstgconfaudiosink.c: (gst_gconf_audio_sink_base_init): * ext/gconf/gstgconfaudiosrc.c: (gst_gconf_audio_src_base_init): * ext/gconf/gstgconfvideosink.c: (gst_gconf_video_sink_base_init): * ext/gconf/gstgconfvideosrc.c: (gst_gconf_video_src_base_init): * ext/gdk_pixbuf/pixbufscale.c: * ext/hal/gsthalaudiosink.c: (gst_hal_audio_sink_base_init): * ext/hal/gsthalaudiosrc.c: (gst_hal_audio_src_base_init): * ext/jpeg/gstjpegdec.c: * ext/jpeg/gstjpegenc.c: * ext/jpeg/gstsmokedec.c: * ext/jpeg/gstsmokeenc.c: * ext/libcaca/gstcacasink.c: * ext/libmng/gstmngdec.c: * ext/libmng/gstmngenc.c: * ext/libpng/gstpngdec.c: * ext/libpng/gstpngenc.c: * ext/mikmod/gstmikmod.c: * ext/raw1394/gstdv1394src.c: * ext/shout2/gstshout2.c: (gst_shout2send_init): * ext/shout2/gstshout2.h: * ext/speex/gstspeexdec.c: * ext/speex/gstspeexenc.c: * gst/alpha/gstalpha.c: * gst/alpha/gstalphacolor.c: * gst/apetag/gstapedemux.c: * gst/auparse/gstauparse.c: * gst/autodetect/gstautoaudiosink.c: (gst_auto_audio_sink_base_init): * gst/autodetect/gstautovideosink.c: (gst_auto_video_sink_base_init): * gst/avi/gstavidemux.c: (gst_avi_demux_base_init): * gst/avi/gstavimux.c: (gst_avimux_base_init): * gst/cutter/gstcutter.c: * gst/debug/breakmydata.c: * gst/debug/efence.c: * gst/debug/gstnavigationtest.c: * gst/debug/gstnavseek.c: * gst/debug/negotiation.c: * gst/debug/progressreport.c: * gst/debug/testplugin.c: * gst/effectv/gstaging.c: * gst/effectv/gstdice.c: * gst/effectv/gstedge.c: * gst/effectv/gstquark.c: * gst/effectv/gstrev.c: * gst/effectv/gstshagadelic.c: * gst/effectv/gstvertigo.c: * gst/effectv/gstwarp.c: * gst/flx/gstflxdec.c: * gst/goom/gstgoom.c: * gst/icydemux/gsticydemux.c: * gst/id3demux/gstid3demux.c: * gst/interleave/deinterleave.c: * gst/interleave/interleave.c: * gst/law/alaw-decode.c: (gst_alawdec_base_init): * gst/law/alaw-encode.c: (gst_alawenc_base_init): * gst/law/mulaw-decode.c: (gst_mulawdec_base_init): * gst/law/mulaw-encode.c: (gst_mulawenc_base_init): * gst/level/gstlevel.c: * gst/matroska/matroska-demux.c: (gst_matroska_demux_base_init): * gst/matroska/matroska-mux.c: (gst_matroska_mux_base_init): * gst/median/gstmedian.c: * gst/monoscope/gstmonoscope.c: * gst/multipart/multipartdemux.c: * gst/multipart/multipartmux.c: * gst/oldcore/gstaggregator.c: * gst/oldcore/gstfdsink.c: * gst/oldcore/gstmd5sink.c: * gst/oldcore/gstmultifilesrc.c: * gst/oldcore/gstpipefilter.c: * gst/oldcore/gstshaper.c: * gst/oldcore/gststatistics.c: * gst/rtp/gstasteriskh263.c: * gst/rtp/gstrtpL16depay.c: * gst/rtp/gstrtpL16pay.c: * gst/rtp/gstrtpamrdepay.c: * gst/rtp/gstrtpamrpay.c: * gst/rtp/gstrtpdepay.c: * gst/rtp/gstrtpgsmpay.c: * gst/rtp/gstrtph263pay.c: * gst/rtp/gstrtph263pdepay.c: * gst/rtp/gstrtph263ppay.c: * gst/rtp/gstrtpilbcdepay.c: * gst/rtp/gstrtpmp4gpay.c: * gst/rtp/gstrtpmp4vdepay.c: * gst/rtp/gstrtpmp4vpay.c: * gst/rtp/gstrtpmpadepay.c: * gst/rtp/gstrtpmpapay.c: * gst/rtp/gstrtppcmadepay.c: * gst/rtp/gstrtppcmapay.c: * gst/rtp/gstrtppcmudepay.c: * gst/rtp/gstrtppcmupay.c: * gst/rtp/gstrtpspeexdepay.c: * gst/rtp/gstrtpspeexpay.c: * gst/rtsp/gstrtpdec.c: * gst/rtsp/gstrtspsrc.c: * gst/smpte/gstsmpte.c: * gst/udp/gstdynudpsink.c: * gst/udp/gstmultiudpsink.c: * gst/udp/gstudpsink.c: * gst/udp/gstudpsrc.c: * gst/videobox/gstvideobox.c: * gst/videofilter/gstgamma.c: (gst_gamma_base_init): * gst/videofilter/gstvideobalance.c: * gst/videofilter/gstvideoflip.c: * gst/videofilter/gstvideotemplate.c: (gst_videotemplate_base_init): * gst/videomixer/videomixer.c: * gst/wavparse/gstwavparse.c: (gst_wavparse_base_init), (gst_wavparse_class_init), (gst_wavparse_dispose), (gst_wavparse_reset), (gst_wavparse_init), (gst_wavparse_perform_seek), (gst_wavparse_peek_chunk_info), (gst_wavparse_peek_chunk), (gst_wavparse_stream_headers), (gst_wavparse_parse_stream_init), (gst_wavparse_send_event), (gst_wavparse_add_src_pad), (gst_wavparse_stream_data), (gst_wavparse_chain), (gst_wavparse_srcpad_event), (gst_wavparse_sink_activate), (gst_wavparse_sink_activate_pull), (gst_wavparse_change_state): * gst/wavparse/gstwavparse.h: * sys/oss/gstossmixerelement.c: * sys/oss/gstosssink.c: * sys/oss/gstosssrc.c: * sys/osxaudio/gstosxaudioelement.c: * sys/osxaudio/gstosxaudiosink.c: * sys/osxaudio/gstosxaudiosrc.c: * sys/sunaudio/gstsunaudiomixer.c: * sys/sunaudio/gstsunaudiosink.c: Define GstElementDetails as const and also static (when defined as global)
498 lines
16 KiB
C
498 lines
16 KiB
C
/* GStreamer
|
|
* Copyright (C) 2002 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2002 Wim Taymans <wim.taymans@chello.be>
|
|
*
|
|
* gstmd5sink.c: A sink computing an md5 checksum from a stream
|
|
*
|
|
* The md5 code was taken from glibc-2.2.3/crypt/md5.c and slightly
|
|
* modified.
|
|
*
|
|
* 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>
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <gst/gst.h>
|
|
#include "gstmd5sink.h"
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (gst_md5sink_debug);
|
|
#define GST_CAT_DEFAULT gst_md5sink_debug
|
|
|
|
static const GstElementDetails gst_md5sink_details =
|
|
GST_ELEMENT_DETAILS ("MD5 Sink",
|
|
"Sink",
|
|
"compute MD5 for incoming data",
|
|
"Benjamin Otte <in7y118@public.uni-hamburg.de>");
|
|
|
|
/* MD5Sink signals and args */
|
|
enum
|
|
{
|
|
/* FILL ME */
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
enum
|
|
{
|
|
ARG_0,
|
|
ARG_MD5
|
|
/* FILL ME */
|
|
};
|
|
|
|
GstStaticPadTemplate md5_sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS_ANY);
|
|
|
|
#define _do_init(bla) \
|
|
GST_DEBUG_CATEGORY_INIT (gst_md5sink_debug, "md5sink", 0, "md5sink element");
|
|
|
|
GST_BOILERPLATE_FULL (GstMD5Sink, gst_md5sink, GstElement, GST_TYPE_ELEMENT,
|
|
_do_init);
|
|
|
|
/* GObject stuff */
|
|
/*static void gst_md5sink_set_property (GObject *object, guint prop_id,
|
|
const GValue *value, GParamSpec *pspec);*/
|
|
static void gst_md5sink_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec);
|
|
|
|
static void gst_md5sink_chain (GstPad * pad, GstData * _data);
|
|
static GstStateChangeReturn gst_md5sink_change_state (GstElement * element,
|
|
GstStateChange transition);
|
|
|
|
|
|
/* MD5 stuff */
|
|
static void md5_init_ctx (GstMD5Sink * ctx);
|
|
static gpointer md5_read_ctx (GstMD5Sink * ctx, gpointer resbuf);
|
|
static gpointer md5_finish_ctx (GstMD5Sink * ctx, gpointer resbuf);
|
|
static void md5_process_bytes (const void *buffer, size_t len,
|
|
GstMD5Sink * ctx);
|
|
static void md5_process_block (const void *buffer, size_t len,
|
|
GstMD5Sink * ctx);
|
|
|
|
/* This array contains the bytes used to pad the buffer to the next
|
|
64-byte boundary. (RFC 1321, 3.1: Step 1) */
|
|
static const guchar fillbuf[64] = { 0x80, 0 /* , 0, 0, ... */ };
|
|
|
|
/* MD5 functions */
|
|
/* Initialize structure containing state of computation.
|
|
(RFC 1321, 3.3: Step 3) */
|
|
static void
|
|
md5_init_ctx (GstMD5Sink * ctx)
|
|
{
|
|
ctx->A = 0x67452301;
|
|
ctx->B = 0xefcdab89;
|
|
ctx->C = 0x98badcfe;
|
|
ctx->D = 0x10325476;
|
|
|
|
ctx->total[0] = ctx->total[1] = 0;
|
|
ctx->buflen = 0;
|
|
}
|
|
|
|
/* Process the remaining bytes in the internal buffer and the usual
|
|
prolog according to the standard and write the result to RESBUF.
|
|
|
|
IMPORTANT: On some systems it is required that RESBUF is correctly
|
|
aligned for a 32 bits value. */
|
|
static gpointer
|
|
md5_finish_ctx (GstMD5Sink * ctx, gpointer resbuf)
|
|
{
|
|
/* Take yet unprocessed bytes into account. */
|
|
guint32 bytes = ctx->buflen;
|
|
size_t pad;
|
|
|
|
/* Now count remaining bytes. */
|
|
ctx->total[0] += bytes;
|
|
if (ctx->total[0] < bytes)
|
|
++ctx->total[1];
|
|
|
|
pad = bytes >= 56 ? 64 + 56 - bytes : 56 - bytes;
|
|
memcpy (&ctx->buffer[bytes], fillbuf, pad);
|
|
|
|
/* Put the 64-bit file length in *bits* at the end of the buffer. */
|
|
*(guint32 *) & ctx->buffer[bytes + pad] = GUINT32_TO_LE (ctx->total[0] << 3);
|
|
*(guint32 *) & ctx->buffer[bytes + pad + 4] =
|
|
GUINT32_TO_LE ((ctx->total[1] << 3) | (ctx->total[0] >> 29));
|
|
|
|
/* Process last bytes. */
|
|
md5_process_block (ctx->buffer, bytes + pad + 8, ctx);
|
|
|
|
return md5_read_ctx (ctx, resbuf);
|
|
}
|
|
|
|
/* Put result from CTX in first 16 bytes following RESBUF. The result
|
|
must be in little endian byte order.
|
|
|
|
IMPORTANT: On some systems it is required that RESBUF is correctly
|
|
aligned for a 32 bits value. */
|
|
static gpointer
|
|
md5_read_ctx (GstMD5Sink * ctx, gpointer resbuf)
|
|
{
|
|
((guint32 *) resbuf)[0] = GUINT32_TO_LE (ctx->A);
|
|
((guint32 *) resbuf)[1] = GUINT32_TO_LE (ctx->B);
|
|
((guint32 *) resbuf)[2] = GUINT32_TO_LE (ctx->C);
|
|
((guint32 *) resbuf)[3] = GUINT32_TO_LE (ctx->D);
|
|
|
|
return resbuf;
|
|
}
|
|
|
|
static void
|
|
md5_process_bytes (const void *buffer, size_t len, GstMD5Sink * ctx)
|
|
{
|
|
/*const void aligned_buffer = buffer; */
|
|
|
|
/* When we already have some bits in our internal buffer concatenate
|
|
both inputs first. */
|
|
if (ctx->buflen != 0) {
|
|
size_t left_over = ctx->buflen;
|
|
size_t add = 128 - left_over > len ? len : 128 - left_over;
|
|
|
|
/* Only put full words in the buffer. */
|
|
/* Forcing alignment here appears to be only an optimization.
|
|
* The glibc source uses __alignof__, which seems to be a
|
|
* gratuitous usage of a GCC extension, when sizeof() will
|
|
* work fine. (And don't question the sanity of using
|
|
* sizeof(guint32) instead of 4. */
|
|
/* add -= add % __alignof__ (guint32); */
|
|
add -= add % sizeof (guint32);
|
|
|
|
memcpy (&ctx->buffer[left_over], buffer, add);
|
|
ctx->buflen += add;
|
|
|
|
if (ctx->buflen > 64) {
|
|
md5_process_block (ctx->buffer, ctx->buflen & ~63, ctx);
|
|
|
|
ctx->buflen &= 63;
|
|
/* The regions in the following copy operation cannot overlap. */
|
|
memcpy (ctx->buffer, &ctx->buffer[(left_over + add) & ~63], ctx->buflen);
|
|
}
|
|
|
|
buffer = (const char *) buffer + add;
|
|
len -= add;
|
|
}
|
|
|
|
/* Process available complete blocks. */
|
|
if (len > 64) {
|
|
md5_process_block (buffer, len & ~63, ctx);
|
|
buffer = (const char *) buffer + (len & ~63);
|
|
len &= 63;
|
|
}
|
|
|
|
/* Move remaining bytes in internal buffer. */
|
|
if (len > 0) {
|
|
size_t left_over = ctx->buflen;
|
|
|
|
memcpy (&ctx->buffer[left_over], buffer, len);
|
|
left_over += len;
|
|
if (left_over >= 64) {
|
|
md5_process_block (ctx->buffer, 64, ctx);
|
|
left_over -= 64;
|
|
memcpy (ctx->buffer, &ctx->buffer[64], left_over);
|
|
}
|
|
ctx->buflen = left_over;
|
|
}
|
|
}
|
|
|
|
|
|
/* These are the four functions used in the four steps of the MD5 algorithm
|
|
and defined in the RFC 1321. The first function is a little bit optimized
|
|
(as found in Colin Plumbs public domain implementation). */
|
|
/* #define FF(b, c, d) ((b & c) | (~b & d)) */
|
|
#define FF(b, c, d) (d ^ (b & (c ^ d)))
|
|
#define FG(b, c, d) FF (d, b, c)
|
|
#define FH(b, c, d) (b ^ c ^ d)
|
|
#define FI(b, c, d) (c ^ (b | ~d))
|
|
|
|
/* Process LEN bytes of BUFFER, accumulating context into CTX.
|
|
It is assumed that LEN % 64 == 0. */
|
|
static void
|
|
md5_process_block (const void *buffer, size_t len, GstMD5Sink * ctx)
|
|
{
|
|
guint32 correct_words[16];
|
|
const guint32 *words = buffer;
|
|
size_t nwords = len / sizeof (guint32);
|
|
const guint32 *endp = words + nwords;
|
|
guint32 A = ctx->A;
|
|
guint32 B = ctx->B;
|
|
guint32 C = ctx->C;
|
|
guint32 D = ctx->D;
|
|
|
|
/* First increment the byte count. RFC 1321 specifies the possible
|
|
length of the file up to 2^64 bits. Here we only compute the
|
|
number of bytes. Do a double word increment. */
|
|
ctx->total[0] += len;
|
|
if (ctx->total[0] < len)
|
|
++ctx->total[1];
|
|
|
|
/* Process all bytes in the buffer with 64 bytes in each round of
|
|
the loop. */
|
|
while (words < endp) {
|
|
guint32 *cwp = correct_words;
|
|
guint32 A_save = A;
|
|
guint32 B_save = B;
|
|
guint32 C_save = C;
|
|
guint32 D_save = D;
|
|
|
|
/* First round: using the given function, the context and a constant
|
|
the next context is computed. Because the algorithms processing
|
|
unit is a 32-bit word and it is determined to work on words in
|
|
little endian byte order we perhaps have to change the byte order
|
|
before the computation. To reduce the work for the next steps
|
|
we store the swapped words in the array CORRECT_WORDS. */
|
|
|
|
#define OP(a, b, c, d, s, T) \
|
|
do \
|
|
{ \
|
|
a += FF (b, c, d) + (*cwp++ = GUINT32_TO_LE (*words)) + T; \
|
|
++words; \
|
|
CYCLIC (a, s); \
|
|
a += b; \
|
|
} \
|
|
while (0)
|
|
|
|
/* It is unfortunate that C does not provide an operator for
|
|
cyclic rotation. Hope the C compiler is smart enough. */
|
|
#define CYCLIC(w, s) (w = (w << s) | (w >> (32 - s)))
|
|
|
|
/* Before we start, one word to the strange constants.
|
|
They are defined in RFC 1321 as
|
|
|
|
T[i] = (int) (4294967296.0 * fabs (sin (i))), i=1..64
|
|
*/
|
|
|
|
/* Round 1. */
|
|
OP (A, B, C, D, 7, 0xd76aa478);
|
|
OP (D, A, B, C, 12, 0xe8c7b756);
|
|
OP (C, D, A, B, 17, 0x242070db);
|
|
OP (B, C, D, A, 22, 0xc1bdceee);
|
|
OP (A, B, C, D, 7, 0xf57c0faf);
|
|
OP (D, A, B, C, 12, 0x4787c62a);
|
|
OP (C, D, A, B, 17, 0xa8304613);
|
|
OP (B, C, D, A, 22, 0xfd469501);
|
|
OP (A, B, C, D, 7, 0x698098d8);
|
|
OP (D, A, B, C, 12, 0x8b44f7af);
|
|
OP (C, D, A, B, 17, 0xffff5bb1);
|
|
OP (B, C, D, A, 22, 0x895cd7be);
|
|
OP (A, B, C, D, 7, 0x6b901122);
|
|
OP (D, A, B, C, 12, 0xfd987193);
|
|
OP (C, D, A, B, 17, 0xa679438e);
|
|
OP (B, C, D, A, 22, 0x49b40821);
|
|
|
|
/* For the second to fourth round we have the possibly swapped words
|
|
in CORRECT_WORDS. Redefine the macro to take an additional first
|
|
argument specifying the function to use. */
|
|
#undef OP
|
|
#define OP(f, a, b, c, d, k, s, T) \
|
|
do \
|
|
{ \
|
|
a += f (b, c, d) + correct_words[k] + T; \
|
|
CYCLIC (a, s); \
|
|
a += b; \
|
|
} \
|
|
while (0)
|
|
|
|
/* Round 2. */
|
|
OP (FG, A, B, C, D, 1, 5, 0xf61e2562);
|
|
OP (FG, D, A, B, C, 6, 9, 0xc040b340);
|
|
OP (FG, C, D, A, B, 11, 14, 0x265e5a51);
|
|
OP (FG, B, C, D, A, 0, 20, 0xe9b6c7aa);
|
|
OP (FG, A, B, C, D, 5, 5, 0xd62f105d);
|
|
OP (FG, D, A, B, C, 10, 9, 0x02441453);
|
|
OP (FG, C, D, A, B, 15, 14, 0xd8a1e681);
|
|
OP (FG, B, C, D, A, 4, 20, 0xe7d3fbc8);
|
|
OP (FG, A, B, C, D, 9, 5, 0x21e1cde6);
|
|
OP (FG, D, A, B, C, 14, 9, 0xc33707d6);
|
|
OP (FG, C, D, A, B, 3, 14, 0xf4d50d87);
|
|
OP (FG, B, C, D, A, 8, 20, 0x455a14ed);
|
|
OP (FG, A, B, C, D, 13, 5, 0xa9e3e905);
|
|
OP (FG, D, A, B, C, 2, 9, 0xfcefa3f8);
|
|
OP (FG, C, D, A, B, 7, 14, 0x676f02d9);
|
|
OP (FG, B, C, D, A, 12, 20, 0x8d2a4c8a);
|
|
|
|
/* Round 3. */
|
|
OP (FH, A, B, C, D, 5, 4, 0xfffa3942);
|
|
OP (FH, D, A, B, C, 8, 11, 0x8771f681);
|
|
OP (FH, C, D, A, B, 11, 16, 0x6d9d6122);
|
|
OP (FH, B, C, D, A, 14, 23, 0xfde5380c);
|
|
OP (FH, A, B, C, D, 1, 4, 0xa4beea44);
|
|
OP (FH, D, A, B, C, 4, 11, 0x4bdecfa9);
|
|
OP (FH, C, D, A, B, 7, 16, 0xf6bb4b60);
|
|
OP (FH, B, C, D, A, 10, 23, 0xbebfbc70);
|
|
OP (FH, A, B, C, D, 13, 4, 0x289b7ec6);
|
|
OP (FH, D, A, B, C, 0, 11, 0xeaa127fa);
|
|
OP (FH, C, D, A, B, 3, 16, 0xd4ef3085);
|
|
OP (FH, B, C, D, A, 6, 23, 0x04881d05);
|
|
OP (FH, A, B, C, D, 9, 4, 0xd9d4d039);
|
|
OP (FH, D, A, B, C, 12, 11, 0xe6db99e5);
|
|
OP (FH, C, D, A, B, 15, 16, 0x1fa27cf8);
|
|
OP (FH, B, C, D, A, 2, 23, 0xc4ac5665);
|
|
|
|
/* Round 4. */
|
|
OP (FI, A, B, C, D, 0, 6, 0xf4292244);
|
|
OP (FI, D, A, B, C, 7, 10, 0x432aff97);
|
|
OP (FI, C, D, A, B, 14, 15, 0xab9423a7);
|
|
OP (FI, B, C, D, A, 5, 21, 0xfc93a039);
|
|
OP (FI, A, B, C, D, 12, 6, 0x655b59c3);
|
|
OP (FI, D, A, B, C, 3, 10, 0x8f0ccc92);
|
|
OP (FI, C, D, A, B, 10, 15, 0xffeff47d);
|
|
OP (FI, B, C, D, A, 1, 21, 0x85845dd1);
|
|
OP (FI, A, B, C, D, 8, 6, 0x6fa87e4f);
|
|
OP (FI, D, A, B, C, 15, 10, 0xfe2ce6e0);
|
|
OP (FI, C, D, A, B, 6, 15, 0xa3014314);
|
|
OP (FI, B, C, D, A, 13, 21, 0x4e0811a1);
|
|
OP (FI, A, B, C, D, 4, 6, 0xf7537e82);
|
|
OP (FI, D, A, B, C, 11, 10, 0xbd3af235);
|
|
OP (FI, C, D, A, B, 2, 15, 0x2ad7d2bb);
|
|
OP (FI, B, C, D, A, 9, 21, 0xeb86d391);
|
|
|
|
/* Add the starting values of the context. */
|
|
A += A_save;
|
|
B += B_save;
|
|
C += C_save;
|
|
D += D_save;
|
|
}
|
|
|
|
/* Put checksum in context given as argument. */
|
|
ctx->A = A;
|
|
ctx->B = B;
|
|
ctx->C = C;
|
|
ctx->D = D;
|
|
}
|
|
|
|
static void
|
|
gst_md5sink_base_init (gpointer g_class)
|
|
{
|
|
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
|
|
|
|
gst_element_class_set_details (gstelement_class, &gst_md5sink_details);
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&md5_sink_template));
|
|
}
|
|
|
|
static void
|
|
gst_md5sink_class_init (GstMD5SinkClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstElementClass *gstelement_class;
|
|
|
|
gobject_class = (GObjectClass *) klass;
|
|
gstelement_class = (GstElementClass *) klass;
|
|
|
|
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_md5sink_get_property);
|
|
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MD5,
|
|
g_param_spec_string ("md5", "md5", "current value of the md5 sum",
|
|
"", G_PARAM_READABLE));
|
|
|
|
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_md5sink_change_state);
|
|
}
|
|
|
|
static void
|
|
gst_md5sink_init (GstMD5Sink * md5sink)
|
|
{
|
|
GstPad *pad;
|
|
|
|
pad =
|
|
gst_pad_new_from_template (gst_static_pad_template_get
|
|
(&md5_sink_template), "sink");
|
|
gst_element_add_pad (GST_ELEMENT (md5sink), pad);
|
|
gst_pad_set_chain_function (pad, GST_DEBUG_FUNCPTR (gst_md5sink_chain));
|
|
|
|
md5_init_ctx (md5sink);
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_md5sink_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstMD5Sink *sink;
|
|
|
|
/* element check */
|
|
sink = GST_MD5SINK (element);
|
|
|
|
g_return_val_if_fail (GST_IS_MD5SINK (sink), GST_STATE_CHANGE_FAILURE);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
md5_init_ctx (sink);
|
|
g_object_notify (G_OBJECT (element), "md5");
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
md5_finish_ctx (sink, sink->md5);
|
|
g_object_notify (G_OBJECT (element), "md5");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if ((GST_ELEMENT_CLASS (parent_class)->change_state))
|
|
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
return GST_STATE_CHANGE_SUCCESS;
|
|
}
|
|
|
|
static void
|
|
gst_md5sink_get_property (GObject * object, guint prop_id, GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstMD5Sink *sink;
|
|
|
|
g_return_if_fail (GST_IS_MD5SINK (object));
|
|
|
|
sink = GST_MD5SINK (object);
|
|
|
|
switch (prop_id) {
|
|
case ARG_MD5:
|
|
{
|
|
/* you could actually get a value for the current md5.
|
|
* This is currently disabled.
|
|
* md5_read_ctx (sink, sink->md5); */
|
|
/* md5 is a guchar[16] */
|
|
int i;
|
|
guchar *md5string = g_malloc0 (33);
|
|
|
|
for (i = 0; i < 16; ++i)
|
|
sprintf (md5string + i * 2, "%02x", sink->md5[i]);
|
|
g_value_set_string (value, md5string);
|
|
g_free (md5string);
|
|
}
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_md5sink_chain (GstPad * pad, GstData * _data)
|
|
{
|
|
GstBuffer *buf = GST_BUFFER (_data);
|
|
GstMD5Sink *md5sink;
|
|
|
|
g_return_if_fail (pad != NULL);
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
g_return_if_fail (buf != NULL);
|
|
|
|
md5sink = GST_MD5SINK (gst_pad_get_parent (pad));
|
|
|
|
if (GST_IS_BUFFER (buf)) {
|
|
md5_process_bytes (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), md5sink);
|
|
}
|
|
|
|
gst_buffer_unref (buf);
|
|
}
|