#include "string.h"
#include "portable_io.h"
-/** size of the output buffer */
-#define WAV_OUTBUF_SIZE 81920
-/** a wav header is always 44 bytes */
+/** A wav header is always 44 bytes. */
#define WAV_HEADER_LEN 44
-/** always write 16 bit header */
+/** Always write 16 bit header. */
#define BITS 16
static void make_wav_header(unsigned int channels, unsigned int samplerate,
write_u32(headbuf + 40, size - 44); /* chunk size */
}
-static ssize_t wav_convert(char *inbuf, size_t len, struct filter_node *fn)
-{
- size_t copy;
- int *bof = fn->private_data;
-
- 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->buf);
- fn->loaded = WAV_HEADER_LEN;
- *bof = 0;
-// return 0;
- }
- copy = PARA_MIN(len, fn->bufsize - fn->loaded);
- memmove(fn->buf + fn->loaded, inbuf, copy);
- fn->loaded += copy;
-// PARA_DEBUG_LOG("len = %d, copy = %d\n", len, copy);
- return copy;
-}
-
static void wav_close(struct filter_node *fn)
{
- free(fn->buf);
- fn->buf = NULL;
free(fn->private_data);
fn->private_data = NULL;
}
{
int *bof;
- fn->bufsize = WAV_OUTBUF_SIZE;
- fn->buf = para_malloc(fn->bufsize);
fn->private_data = para_malloc(sizeof(int));
bof = fn->private_data;
- fn->loaded = 0;
*bof = 1;
- PARA_INFO_LOG("wav filter node: %p, output buffer: %p, loaded: %zd\n",
- fn, fn->buf, fn->loaded);
}
static void wav_pre_select(struct sched *s, struct task *t)
char *header, *buf;
int32_t rate, ch;
-
t->error = 0;
if (iqs == 0) {
ret = -E_WAV_EOF;
}
/**
- * the init function of the wav filter
+ * The init function of the wav filter.
*
- * \param f struct to initialize
+ * \param f Structure to initialize.
*/
void wav_filter_init(struct filter *f)
{
- f->convert = wav_convert;
f->close = wav_close;
f->open = wav_open;
f->pre_select = wav_pre_select;