/*
- * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file wav_filter.c A filter that inserts a wave header. */
-#include "para.h"
+#include <regex.h>
+#include "para.h"
+#include "error.h"
#include "list.h"
#include "sched.h"
+#include "ggo.h"
#include "filter.h"
#include "string.h"
#include "portable_io.h"
int bytespersec = channels * samplerate * BITS / 8;
int align = channels * BITS / 8;
- assert(channels);
PARA_DEBUG_LOG("writing wave header: %d channels, %d KHz\n", channels, samplerate);
memset(headbuf, 0, WAV_HEADER_LEN);
memcpy(headbuf, "RIFF", 4);
write_u32(headbuf + 4, size - 8);
memcpy(headbuf + 8, "WAVE", 4);
memcpy(headbuf + 12, "fmt ", 4);
- write_u32(headbuf + 16, 16);
- write_u16(headbuf + 20, 1); /* format */
+ write_u32(headbuf + 16, 16); /* 16 + extra format bytes (zero) */
+ write_u16(headbuf + 20, 1); /* format (1 == PCM/uncompressed) */
write_u16(headbuf + 22, channels);
write_u32(headbuf + 24, samplerate);
write_u32(headbuf + 28, bytespersec);
- write_u16(headbuf + 32, align);
- write_u16(headbuf + 34, BITS);
- memcpy(headbuf + 36, "data", 4);
- write_u32(headbuf + 40, size - 44);
+ write_u16(headbuf + 32, align); /* number of bytes per sample slice */
+ write_u16(headbuf + 34, BITS); /* significant bits per sample */
+ memcpy(headbuf + 36, "data", 4); /* chunk ID */
+ write_u32(headbuf + 40, size - 44); /* chunk size */
}
static ssize_t wav_convert(char *inbuf, size_t len, struct filter_node *fn)
if (*bof) {
if (!len)
return 0;
+ if (!fn->fc->channels || !fn->fc->samplerate) {
+ PARA_ERROR_LOG("%s\n", para_strerror(E_WAV_BAD_FC));
+ return -E_WAV_BAD_FC;
+ }
make_wav_header(fn->fc->channels, fn->fc->samplerate, fn);
fn->loaded = WAV_HEADER_LEN;
*bof = 0;