ref: 8ebd34543023c06dd1c60d50f93930cd188a1bdc
parent: 07ec79072d67c0c9854c1973d9af11a2f329983b
author: Jean-Marc Valin <[email protected]>
date: Thu Nov 29 15:17:32 EST 2007
initial celt struct
--- /dev/null
+++ b/libcelt/celt.c
@@ -1,0 +1,80 @@
+/* (C) 2007 Jean-Marc Valin, CSIRO
+*/
+/*
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ - Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ - Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+ - Neither the name of the Xiph.org Foundation nor the names of its
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
+ CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include "os_support.h"
+
+struct CELTState_ {+ int frame_size;
+ int block_size;
+ int nb_blocks;
+
+ float preemph;
+ float preemph_mem;
+
+ float *window;
+ float *in_mem;
+ float *mdct_overlap;
+ float *out_mem;
+};
+
+typedef struct CELTState_ CELTState;
+
+CELTState *celt_init(int blockSize, int blocksPerFrame)
+{+
+}
+
+void celt_encode(CELTState *st, short *pcm)
+{+ int i;
+ int N = st->block_size;
+ float in[(st->nb_blocks+1)*N];
+ float X[st->nb_blocks*N];
+
+ /* FIXME: Add preemphasis */
+ for (i=0;i<N;i++)
+ in[i] = st->in_mem[i];
+ for (;i<st->nb_blocks*N;i++)
+ in[i] = pcm[i-N];
+
+ /* Compute MDCTs */
+
+ /* Pitch analysis */
+
+ /* Band normalisation */
+
+ /* Pitch prediction */
+
+ /* Residual quantisation */
+
+ /* Synthesis */
+}
+