ext/wavpack/: Add wavpack encoder element (#343131).

Original commit message from CVS:
Patch by: Sebastian Dröge  <mail at slomosnail de>
* ext/wavpack/Makefile.am:
* ext/wavpack/gstwavpack.c: (plugin_init):
* ext/wavpack/gstwavpackcommon.h:
* ext/wavpack/gstwavpackenc.c: (gst_wavpack_enc_mode_get_type),
(gst_wavpack_enc_correction_mode_get_type),
(gst_wavpack_enc_joint_stereo_mode_get_type),
(gst_wavpack_enc_base_init), (gst_wavpack_enc_class_init),
(gst_wavpack_enc_init), (gst_wavpack_enc_dispose),
(gst_wavpack_enc_sink_set_caps), (gst_wavpack_enc_set_wp_config),
(gst_wavpack_enc_format_samples), (gst_wavpack_enc_push_block),
(gst_wavpack_enc_chain), (gst_wavpack_enc_rewrite_first_block),
(gst_wavpack_enc_sink_event), (gst_wavpack_enc_change_state),
(gst_wavpack_enc_set_property), (gst_wavpack_enc_get_property),
(gst_wavpack_enc_plugin_init):
* ext/wavpack/gstwavpackenc.h:
* ext/wavpack/md5.c:
* ext/wavpack/md5.h:
Add wavpack encoder element (#343131).

ChangeLog

@@ -1,3 +1,26 @@
+2006-06-10  Tim-Philipp Müller  <tim at centricular dot net>
+
+	Patch by: Sebastian Dröge  <mail at slomosnail de>
+
+	* ext/wavpack/Makefile.am:
+	* ext/wavpack/gstwavpack.c: (plugin_init):
+	* ext/wavpack/gstwavpackcommon.h:
+	* ext/wavpack/gstwavpackenc.c: (gst_wavpack_enc_mode_get_type),
+	(gst_wavpack_enc_correction_mode_get_type),
+	(gst_wavpack_enc_joint_stereo_mode_get_type),
+	(gst_wavpack_enc_base_init), (gst_wavpack_enc_class_init),
+	(gst_wavpack_enc_init), (gst_wavpack_enc_dispose),
+	(gst_wavpack_enc_sink_set_caps), (gst_wavpack_enc_set_wp_config),
+	(gst_wavpack_enc_format_samples), (gst_wavpack_enc_push_block),
+	(gst_wavpack_enc_chain), (gst_wavpack_enc_rewrite_first_block),
+	(gst_wavpack_enc_sink_event), (gst_wavpack_enc_change_state),
+	(gst_wavpack_enc_set_property), (gst_wavpack_enc_get_property),
+	(gst_wavpack_enc_plugin_init):
+	* ext/wavpack/gstwavpackenc.h:
+	* ext/wavpack/md5.c:
+	* ext/wavpack/md5.h:
+	  Add wavpack encoder element (#343131).
+
 2006-06-09  Tim-Philipp Müller  <tim at centricular dot net>
 
 	* configure.ac:

ext/wavpack/Makefile.am

@@ -1,13 +1,22 @@
 
 plugin_LTLIBRARIES = libgstwavpack.la
 
-libgstwavpack_la_SOURCES =	gstwavpack.c \
+libgstwavpack_la_SOURCES = \
+				gstwavpack.c \
 				gstwavpackcommon.c \
 				gstwavpackparse.c \
-				gstwavpackdec.c
+				gstwavpackdec.c \
+				gstwavpackenc.c \
+				md5.c
 
 libgstwavpack_la_CFLAGS = $(GST_CFLAGS) $(WAVPACK_CFLAGS)
 libgstwavpack_la_LIBADD = $(GST_LIBS) $(WAVPACK_LIBS)
 libgstwavpack_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
 
-noinst_HEADERS = gstwavpackparse.h gstwavpackdec.h gstwavpackcommon.h
+noinst_HEADERS = \
+		gstwavpackparse.h \
+		gstwavpackdec.h \
+		gstwavpackenc.h \
+		gstwavpackcommon.h \
+		md5.h
+

ext/wavpack/gstwavpack.c

@@ -25,16 +25,18 @@
 
 #include "gstwavpackparse.h"
 #include "gstwavpackdec.h"
+#include "gstwavpackenc.h"
 
 static gboolean
 plugin_init (GstPlugin * plugin)
 {
   return (gst_wavpack_parse_plugin_init (plugin)
-      && gst_wavpack_dec_plugin_init (plugin));
+      && gst_wavpack_dec_plugin_init (plugin)
+      && gst_wavpack_enc_plugin_init (plugin));
 }
 
 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
     GST_VERSION_MINOR,
     "wavpack",
     "Wavpack lossless/lossy audio format handling",
-    plugin_init, VERSION, "LGPL", "gst-wavpack", "http://www.wavpack.com")
+    plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

ext/wavpack/gstwavpackcommon.h

@@ -1,4 +1,4 @@
 #include <gst/gst.h>
 #include <wavpack/wavpack.h>
 
-gboolean gst_wavpack_read_header (WavpackHeader *header, guint8 *buf);
+gboolean gst_wavpack_read_header (WavpackHeader * header, guint8 * buf);

ext/wavpack/gstwavpackenc.h

@@ -0,0 +1,93 @@
+/* GStreamer Wavpack encoder plugin
+ * Copyrigh (c) 2006 Sebastian Dröge <mail@slomosnail.de>
+ *
+ * gstwavpackenc.h: Wavpack audio encoder
+ *
+ * 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.
+ */
+
+#ifndef __GST_WAVPACK_ENC_H__
+#define __GST_WAVPACK_ENC_H__
+
+#include <gst/gst.h>
+
+#include <wavpack/wavpack.h>
+#include <wavpack/md5.h>
+
+G_BEGIN_DECLS
+/* #define's don't like whitespacey bits */
+#define GST_TYPE_WAVPACK_ENC \
+  (gst_wavpack_enc_get_type())
+#define GST_WAVPACK_ENC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_WAVPACK_ENC,GstWavpackEnc))
+#define GST_WAVPACK_ENC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_WAVPACK_ENC,GstWavpackEnc))
+#define GST_IS_WAVPACK_ENC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_WAVPACK_ENC))
+#define GST_IS_WAVPACK_ENC_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_WAVPACK_ENC))
+typedef struct _GstWavpackEnc GstWavpackEnc;
+typedef struct _GstWavpackEncClass GstWavpackEncClass;
+
+typedef struct
+{
+  gboolean correction;
+  GstWavpackEnc *wavpack_enc;
+} write_id;
+
+
+struct _GstWavpackEnc
+{
+  GstElement element;
+
+  GstPad *sinkpad, *srcpad;
+  GstPad *wvcsrcpad;
+
+  GstFlowReturn srcpad_last_return;
+  GstFlowReturn wvcsrcpad_last_return;
+
+  WavpackConfig *wp_config;
+  WavpackContext *wp_context;
+
+  gint samplerate;
+  gint channels;
+  gint width;
+
+  write_id *wv_id, *wvc_id;
+
+  guint mode;
+  gdouble bitrate;
+  guint correction_mode;
+  gboolean md5;
+  MD5_CTX *md5_context;
+  gboolean extra_processing;
+  guint joint_stereo_mode;
+
+  void *first_block;
+  int32_t first_block_size;
+};
+
+struct _GstWavpackEncClass
+{
+  GstElementClass parent;
+};
+
+GType gst_wavpack_enc_get_type (void);
+
+gboolean gst_wavpack_enc_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+#endif /* __GST_WAVPACK_ENC_H__ */

ext/wavpack/md5.c

@@ -0,0 +1,271 @@
+/*
+ * This code implements the MD5 message-digest algorithm.
+ * The algorithm is due to Ron Rivest.	This code was
+ * written by Colin Plumb in 1993, no copyright is claimed.
+ * This code is in the public domain; do with it what you wish.
+ *
+ * Equivalent code is available from RSA Data Security, Inc.
+ * This code has been tested against that, and is equivalent,
+ * except that you don't need to include two pages of legalese
+ * with every copy.
+ *
+ * To compute the message digest of a chunk of bytes, declare an
+ * MD5Context structure, pass it to MD5Init, call MD5Update as
+ * needed on buffers full of bytes, and then call MD5Final, which
+ * will fill a supplied 16-byte array with the digest.
+ */
+
+/* Brutally hacked by John Walker back from ANSI C to K&R (no
+   prototypes) to maintain the tradition that Netfone will compile
+   with Sun's original "cc". */
+
+#include <string.h>             /* for memcpy() */
+#include <glib.h>
+#include "md5.h"
+
+#if G_BYTE_ORDER == G_BIG_ENDIAN
+#define HIGHFIRST
+#endif
+
+#ifndef HIGHFIRST
+#define byteReverse(buf, len)   /* Nothing */
+#else
+/*
+ * Note: this code is harmless on little-endian machines.
+ */
+void
+byteReverse (buf, longs)
+     unsigned char *buf;
+     unsigned longs;
+{
+  uint32 t;
+
+  do {
+    t = (uint32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
+        ((unsigned) buf[1] << 8 | buf[0]);
+    *(uint32 *) buf = t;
+    buf += 4;
+  } while (--longs);
+}
+#endif
+
+/*
+ * Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
+ * initialization constants.
+ */
+void
+MD5Init (ctx)
+     struct MD5Context *ctx;
+{
+  ctx->buf[0] = 0x67452301;
+  ctx->buf[1] = 0xefcdab89;
+  ctx->buf[2] = 0x98badcfe;
+  ctx->buf[3] = 0x10325476;
+
+  ctx->bits[0] = 0;
+  ctx->bits[1] = 0;
+}
+
+/*
+ * Update context to reflect the concatenation of another buffer full
+ * of bytes.
+ */
+void
+MD5Update (ctx, buf, len)
+     struct MD5Context *ctx;
+     unsigned char *buf;
+     unsigned len;
+{
+  uint32 t;
+
+  /* Update bitcount */
+
+  t = ctx->bits[0];
+  if ((ctx->bits[0] = t + ((uint32) len << 3)) < t)
+    ctx->bits[1]++;             /* Carry from low to high */
+  ctx->bits[1] += len >> 29;
+
+  t = (t >> 3) & 0x3f;          /* Bytes already in shsInfo->data */
+
+  /* Handle any leading odd-sized chunks */
+
+  if (t) {
+    unsigned char *p = (unsigned char *) ctx->in + t;
+
+    t = 64 - t;
+    if (len < t) {
+      memcpy (p, buf, len);
+      return;
+    }
+    memcpy (p, buf, t);
+    byteReverse (ctx->in, 16);
+    MD5Transform (ctx->buf, (uint32 *) ctx->in);
+    buf += t;
+    len -= t;
+  }
+  /* Process data in 64-byte chunks */
+
+  while (len >= 64) {
+    memcpy (ctx->in, buf, 64);
+    byteReverse (ctx->in, 16);
+    MD5Transform (ctx->buf, (uint32 *) ctx->in);
+    buf += 64;
+    len -= 64;
+  }
+
+  /* Handle any remaining bytes of data. */
+
+  memcpy (ctx->in, buf, len);
+}
+
+/*
+ * Final wrapup - pad to 64-byte boundary with the bit pattern 
+ * 1 0* (64-bit count of bits processed, MSB-first)
+ */
+void
+MD5Final (digest, ctx)
+     unsigned char digest[16];
+     struct MD5Context *ctx;
+{
+  unsigned count;
+  unsigned char *p;
+
+  /* Compute number of bytes mod 64 */
+  count = (ctx->bits[0] >> 3) & 0x3F;
+
+  /* Set the first char of padding to 0x80.  This is safe since there is
+     always at least one byte free */
+  p = ctx->in + count;
+  *p++ = 0x80;
+
+  /* Bytes of padding needed to make 64 bytes */
+  count = 64 - 1 - count;
+
+  /* Pad out to 56 mod 64 */
+  if (count < 8) {
+    /* Two lots of padding:  Pad the first block to 64 bytes */
+    memset (p, 0, count);
+    byteReverse (ctx->in, 16);
+    MD5Transform (ctx->buf, (uint32 *) ctx->in);
+
+    /* Now fill the next block with 56 bytes */
+    memset (ctx->in, 0, 56);
+  } else {
+    /* Pad block to 56 bytes */
+    memset (p, 0, count - 8);
+  }
+  byteReverse (ctx->in, 14);
+
+  /* Append length in bits and transform */
+  ((uint32 *) ctx->in)[14] = ctx->bits[0];
+  ((uint32 *) ctx->in)[15] = ctx->bits[1];
+
+  MD5Transform (ctx->buf, (uint32 *) ctx->in);
+  byteReverse ((unsigned char *) ctx->buf, 4);
+  memcpy (digest, ctx->buf, 16);
+  memset (ctx, 0, sizeof (ctx));        /* In case it's sensitive */
+}
+
+
+/* The four core functions - F1 is optimized somewhat */
+
+/* #define F1(x, y, z) (x & y | ~x & z) */
+#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) (x ^ y ^ z)
+#define F4(x, y, z) (y ^ (x | ~z))
+
+/* This is the central step in the MD5 algorithm. */
+#define MD5STEP(f, w, x, y, z, data, s) \
+	( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
+
+/*
+ * The core of the MD5 algorithm, this alters an existing MD5 hash to
+ * reflect the addition of 16 longwords of new data.  MD5Update blocks
+ * the data and converts bytes into longwords for this routine.
+ */
+void
+MD5Transform (buf, in)
+     uint32 buf[4];
+     uint32 in[16];
+{
+  register uint32 a, b, c, d;
+
+  a = buf[0];
+  b = buf[1];
+  c = buf[2];
+  d = buf[3];
+
+  MD5STEP (F1, a, b, c, d, in[0] + 0xd76aa478, 7);
+  MD5STEP (F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
+  MD5STEP (F1, c, d, a, b, in[2] + 0x242070db, 17);
+  MD5STEP (F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
+  MD5STEP (F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
+  MD5STEP (F1, d, a, b, c, in[5] + 0x4787c62a, 12);
+  MD5STEP (F1, c, d, a, b, in[6] + 0xa8304613, 17);
+  MD5STEP (F1, b, c, d, a, in[7] + 0xfd469501, 22);
+  MD5STEP (F1, a, b, c, d, in[8] + 0x698098d8, 7);
+  MD5STEP (F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
+  MD5STEP (F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
+  MD5STEP (F1, b, c, d, a, in[11] + 0x895cd7be, 22);
+  MD5STEP (F1, a, b, c, d, in[12] + 0x6b901122, 7);
+  MD5STEP (F1, d, a, b, c, in[13] + 0xfd987193, 12);
+  MD5STEP (F1, c, d, a, b, in[14] + 0xa679438e, 17);
+  MD5STEP (F1, b, c, d, a, in[15] + 0x49b40821, 22);
+
+  MD5STEP (F2, a, b, c, d, in[1] + 0xf61e2562, 5);
+  MD5STEP (F2, d, a, b, c, in[6] + 0xc040b340, 9);
+  MD5STEP (F2, c, d, a, b, in[11] + 0x265e5a51, 14);
+  MD5STEP (F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
+  MD5STEP (F2, a, b, c, d, in[5] + 0xd62f105d, 5);
+  MD5STEP (F2, d, a, b, c, in[10] + 0x02441453, 9);
+  MD5STEP (F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
+  MD5STEP (F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
+  MD5STEP (F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
+  MD5STEP (F2, d, a, b, c, in[14] + 0xc33707d6, 9);
+  MD5STEP (F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
+  MD5STEP (F2, b, c, d, a, in[8] + 0x455a14ed, 20);
+  MD5STEP (F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
+  MD5STEP (F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
+  MD5STEP (F2, c, d, a, b, in[7] + 0x676f02d9, 14);
+  MD5STEP (F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
+
+  MD5STEP (F3, a, b, c, d, in[5] + 0xfffa3942, 4);
+  MD5STEP (F3, d, a, b, c, in[8] + 0x8771f681, 11);
+  MD5STEP (F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
+  MD5STEP (F3, b, c, d, a, in[14] + 0xfde5380c, 23);
+  MD5STEP (F3, a, b, c, d, in[1] + 0xa4beea44, 4);
+  MD5STEP (F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
+  MD5STEP (F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
+  MD5STEP (F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
+  MD5STEP (F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
+  MD5STEP (F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
+  MD5STEP (F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
+  MD5STEP (F3, b, c, d, a, in[6] + 0x04881d05, 23);
+  MD5STEP (F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
+  MD5STEP (F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
+  MD5STEP (F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
+  MD5STEP (F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
+
+  MD5STEP (F4, a, b, c, d, in[0] + 0xf4292244, 6);
+  MD5STEP (F4, d, a, b, c, in[7] + 0x432aff97, 10);
+  MD5STEP (F4, c, d, a, b, in[14] + 0xab9423a7, 15);
+  MD5STEP (F4, b, c, d, a, in[5] + 0xfc93a039, 21);
+  MD5STEP (F4, a, b, c, d, in[12] + 0x655b59c3, 6);
+  MD5STEP (F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
+  MD5STEP (F4, c, d, a, b, in[10] + 0xffeff47d, 15);
+  MD5STEP (F4, b, c, d, a, in[1] + 0x85845dd1, 21);
+  MD5STEP (F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
+  MD5STEP (F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
+  MD5STEP (F4, c, d, a, b, in[6] + 0xa3014314, 15);
+  MD5STEP (F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
+  MD5STEP (F4, a, b, c, d, in[4] + 0xf7537e82, 6);
+  MD5STEP (F4, d, a, b, c, in[11] + 0xbd3af235, 10);
+  MD5STEP (F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
+  MD5STEP (F4, b, c, d, a, in[9] + 0xeb86d391, 21);
+
+  buf[0] += a;
+  buf[1] += b;
+  buf[2] += c;
+  buf[3] += d;
+}

ext/wavpack/md5.h

@@ -0,0 +1,28 @@
+#ifndef MD5_H
+#define MD5_H
+
+#include "_stdint.h"
+
+#ifndef uint32
+typedef uint32_t uint32;
+#endif
+
+struct MD5Context
+{
+  uint32 buf[4];
+  uint32 bits[2];
+  unsigned char in[64];
+};
+
+extern void MD5Init (struct MD5Context *ctx);
+extern void MD5Update (struct MD5Context *ctx, unsigned char *buf,
+    unsigned len);
+extern void MD5Final (unsigned char digest[16], struct MD5Context *ctx);
+extern void MD5Transform (uint32 buf[4], uint32 in[16]);
+
+/*
+ * This is needed to make RSAREF happy on some MS-DOS compilers.
+ */
+typedef struct MD5Context MD5_CTX;
+
+#endif /* !MD5_H */