-/*
- * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/** \file wav_filter.c A filter that inserts a wave header. */
#include <regex.h>
-#include <stdbool.h>
#include "para.h"
#include "error.h"
#include "list.h"
#include "sched.h"
-#include "ggo.h"
#include "buffer_tree.h"
#include "filter.h"
#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,
+static void make_wav_header(unsigned int channels, unsigned int sample_rate,
char *headbuf)
{
unsigned int size = 0x7fffffff;
- int bytespersec = channels * samplerate * BITS / 8;
+ int bytespersec = channels * sample_rate * BITS / 8;
int align = channels * BITS / 8;
- PARA_DEBUG_LOG("writing wave header: %d channels, %d KHz\n", channels, samplerate);
+ PARA_DEBUG_LOG("writing wave header: %u channels, %u KHz\n", channels, sample_rate);
memset(headbuf, 0, WAV_HEADER_LEN);
memcpy(headbuf, "RIFF", 4);
write_u32(headbuf + 4, size - 8);
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 + 24, sample_rate);
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 */
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)
+static void wav_pre_select(struct sched *s, void *context)
{
- struct filter_node *fn = container_of(t, struct filter_node, task);
+ struct filter_node *fn = context;
size_t iqs = btr_get_input_queue_size(fn->btrn);
- t->error = 0;
if (iqs == 0)
return;
- s->timeout.tv_sec = 0;
- s->timeout.tv_usec = 1;
+ sched_min_delay(s);
}
-static void wav_post_select(__a_unused struct sched *s, struct task *t)
+static int wav_post_select(__a_unused struct sched *s, void *context)
{
- struct filter_node *fn = container_of(t, struct filter_node, task);
+ struct filter_node *fn = context;
struct btr_node *btrn = fn->btrn;
size_t iqs = btr_get_input_queue_size(btrn);
int ret;
char *header, *buf;
int32_t rate, ch;
-
- t->error = 0;
if (iqs == 0) {
ret = -E_WAV_EOF;
if (btr_no_parent(btrn))
goto err;
- return;
+ return 0;
}
- ret = btr_exec_up(btrn, "samplerate", &buf);
+ ret = btr_exec_up(btrn, "sample_rate", &buf);
if (ret < 0) {
ret = -E_WAV_BAD_FC;
goto err;
btr_add_output(header, WAV_HEADER_LEN, btrn);
ret = -E_WAV_SUCCESS;
err:
- t->error = ret;
if (ret == -E_WAV_SUCCESS)
- btr_splice_out_node(btrn);
+ btr_splice_out_node(&fn->btrn);
else {
- btr_remove_node(btrn);
+ btr_remove_node(&fn->btrn);
PARA_ERROR_LOG("%s\n", para_strerror(-ret));
}
+ return ret;
}
-/**
- * the init function of the wav filter
- *
- * \param f struct 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;
- f->post_select = wav_post_select;
-}
+const struct filter lsg_filter_cmd_com_wav_user_data = {
+ .close = wav_close,
+ .open = wav_open,
+ .pre_select = wav_pre_select,
+ .post_select = wav_post_select,
+};