1 files changed, 144 insertions, 0 deletions
diff --git a/gst/wavparse/gstriff.c b/gst/wavparse/gstriff.c
new file mode 100644
index 00000000..d343568c
--- /dev/null
+++ b/gst/wavparse/gstriff.c
@@ -0,0 +1,144 @@
+/* Gnome-Streamer
+ * 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 <stdlib.h>
+#include <gstriff.h>
+
+
+GstRiff *gst_riff_new() {
+  GstRiff *riff;
+
+  riff = (GstRiff *)malloc(sizeof(GstRiff));
+  g_return_val_if_fail(riff != NULL, NULL);
+
+  riff->form = 0;
+  riff->chunks = NULL;
+  riff->state = 0;
+  riff->curoffset = 0;
+  riff->nextlikely = 0;
+
+  return riff;
+}
+
+gint gst_riff_next_buffer(GstRiff *riff,GstBuffer *buf,gulong off) {
+  gulong last;
+  GstRiffChunk *chunk;
+
+  g_return_val_if_fail(riff != NULL, 0);
+  g_return_val_if_fail(buf != NULL, 0);
+  g_return_val_if_fail(GST_BUFFER_DATA(buf) != NULL, 0);
+
+  last = off + GST_BUFFER_SIZE(buf);
+
+  if (off == 0) {
+    gulong *words = (gulong *)GST_BUFFER_DATA(buf);
+
+    /* verify this is a valid RIFF file, first of all */
+    if (words[0] != gst_riff_fourcc_to_id("RIFF")) {
+      riff->state = GST_RIFF_ENOTRIFF;
+      return riff->state;
+    }
+    riff->form = words[2];
+//    g_print("form is 0x%08x '%s'\n",words[2],gst_riff_id_to_fourcc(words[2]));
+    riff->nextlikely = 12;	/* skip 'RIFF', length, and form */
+  }
+
+  /* loop while the next likely chunk header is in this buffer */
+  while ((riff->nextlikely+8) < last) {
+    gulong *words = (gulong *)((guchar *)GST_BUFFER_DATA(buf) + riff->nextlikely);
+
+//    g_print("next likely chunk is at offset 0x%08x\n",riff->nextlikely);
+    chunk = (GstRiffChunk *)malloc(sizeof(GstRiffChunk));
+    g_return_val_if_fail(chunk != NULL,0);
+    chunk->offset = riff->nextlikely+8;	/* point to the actual data */
+    chunk->id = words[0];
+    chunk->size = words[1];
+//    g_print("chunk id is 0x%08x '%s' and is 0x%08x long\n",words[0],
+//            gst_riff_id_to_fourcc(words[0]),words[1]);
+    riff->nextlikely += 8 + chunk->size;	/* doesn't include hdr */
+    riff->chunks = g_list_prepend(riff->chunks,chunk);
+  }
+
+  return 0;
+}
+
+
+gulong gst_riff_fourcc_to_id(gchar *fourcc) {
+  g_return_val_if_fail(fourcc != NULL,0);
+
+  return (fourcc[0] << 0) | (fourcc[1] << 8) |
+         (fourcc[2] << 16) | (fourcc[3] << 24);
+}
+
+gchar *gst_riff_id_to_fourcc(gulong id) {
+  gchar *fourcc = (gchar *)malloc(5);
+
+  g_return_val_if_fail(fourcc != NULL, NULL);
+
+  fourcc[0] = (id >> 0) & 0xff;
+  fourcc[1] = (id >> 8) & 0xff;
+  fourcc[2] = (id >> 16) & 0xff;
+  fourcc[3] = (id >> 24) & 0xff;
+  fourcc[4] = 0;
+
+  return fourcc;
+}
+
+GList *gst_riff_get_chunk_list(GstRiff *riff) {
+  g_return_val_if_fail(riff != NULL, NULL);
+
+  return riff->chunks;
+}
+
+GstRiffChunk *gst_riff_get_chunk(GstRiff *riff,gchar *fourcc) {
+  GList *chunk;
+
+  g_return_val_if_fail(riff != NULL, NULL);
+  g_return_val_if_fail(fourcc != NULL, NULL);
+
+  chunk = riff->chunks;
+  while (chunk) {
+    if (((GstRiffChunk *)(chunk->data))->id == gst_riff_fourcc_to_id(fourcc))
+      return (GstRiffChunk *)(chunk->data);
+    chunk = g_list_next(chunk);
+  }
+
+  return NULL;
+}
+
+gulong gst_riff_get_nextlikely(GstRiff *riff) {
+  g_return_val_if_fail(riff != NULL, 0);
+
+  return riff->nextlikely;
+}
+
+/*
+    guchar *hchar = (guchar *)(buf->data);
+    gulong hlong = *(gulong *)(buf->data);
+
+    g_print("header is 0x%08x native, %02x %02x %02x %02x, '%c%c%c%c'\n",
+            hlong,
+            hchar[0],hchar[1],hchar[2],hchar[3],
+            hchar[0],hchar[1],hchar[2],hchar[3]);
+    g_print("header 0x%08x translates to '%s'\n",hlong,
+            gst_riff_id_to_fourcc(hlong));
+    g_print("header 0x%08x trancodes to 0x%08x\n",hlong,
+            gst_riff_fourcc_to_id(gst_riff_id_to_fourcc(hlong)));
+*/