/*
- * 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.
*/
#include "list.h"
#include "sched.h"
+#include "ggo.h"
#include "filter.h"
#include "string.h"
+#include "portable_io.h"
/** size of the output buffer */
#define WAV_OUTBUF_SIZE 81920
/** always write 16 bit header */
#define BITS 16
-/**
- * write a 32 bit unsigned value to a buffer
- *
- * \param buf the buffer to write to
- * \param x the value to write
- */
-#define WRITE_U32(buf, x) (buf)[0] = (unsigned char)((x) & 0xff);\
- (buf)[1] = (unsigned char)(((x) >> 8) & 0xff);\
- (buf)[2] = (unsigned char)(((x) >> 16) & 0xff);\
- (buf)[3] = (unsigned char)(((x) >> 24) & 0xff);
-
-/**
- * write a 16 bit unsigned value to a buffer
- *
- * \param buf the buffer to write to
- * \param x the value to write
- */
-#define WRITE_U16(buf, x) (buf)[0] = (unsigned char)((x) & 0xff);
-
static void make_wav_header(unsigned int channels, unsigned int samplerate,
struct filter_node *fn)
{
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);
+ 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_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_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); /* 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)