/*
- * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2013 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 "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,
- struct filter_node *fn)
+static void make_wav_header(unsigned int channels, unsigned int sample_rate,
+ char *headbuf)
{
- char *headbuf = fn->buf;
unsigned int size = 0x7fffffff;
- int bytespersec = channels * samplerate * BITS / 8;
+ int bytespersec = channels * sample_rate * BITS / 8;
int align = channels * BITS / 8;
- assert(channels);
- PARA_DEBUG_LOG("writing wave header: %d channels, %d KHz\n", channels, samplerate);
+ PARA_DEBUG_LOG("writing wave header: %d channels, %d KHz\n", channels, sample_rate);
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 + 24, sample_rate);
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);
-}
-
-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;
- make_wav_header(fn->fc->channels, fn->fc->samplerate, fn);
- 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;
+ 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 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)
+{
+ struct filter_node *fn = container_of(t, struct filter_node, task);
+ size_t iqs = btr_get_input_queue_size(fn->btrn);
+
+ t->error = 0;
+ if (iqs == 0)
+ return;
+ sched_min_delay(s);
+}
+
+static int wav_post_select(__a_unused struct sched *s, struct task *t)
+{
+ struct filter_node *fn = container_of(t, struct filter_node, task);
+ struct btr_node *btrn = fn->btrn;
+ size_t iqs = btr_get_input_queue_size(btrn);
+ int ret;
+ char *header, *buf;
+ int32_t rate, ch;
+
+ if (iqs == 0) {
+ ret = -E_WAV_EOF;
+ if (btr_no_parent(btrn))
+ goto err;
+ return 0;
+ }
+ ret = btr_exec_up(btrn, "sample_rate", &buf);
+ if (ret < 0) {
+ ret = -E_WAV_BAD_FC;
+ goto err;
+ }
+ ret = para_atoi32(buf, &rate);
+ free(buf);
+ if (ret < 0)
+ goto err;
+ ret = btr_exec_up(btrn, "channels", &buf);
+ if (ret < 0) {
+ ret = -E_WAV_BAD_FC;
+ goto err;
+ }
+ ret = para_atoi32(buf, &ch);
+ free(buf);
+ if (ret < 0)
+ goto err;
+ header = para_malloc(WAV_HEADER_LEN);
+ make_wav_header(ch, rate, header);
+ btr_add_output(header, WAV_HEADER_LEN, btrn);
+ ret = -E_WAV_SUCCESS;
+err:
+ if (ret == -E_WAV_SUCCESS)
+ btr_splice_out_node(btrn);
+ else {
+ btr_remove_node(&fn->btrn);
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ }
+ return ret;
}
/**
- * 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;
+ f->new_post_select = wav_post_select;
}
projects / paraslash.git / blobdiff