/*
- * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
*/
#include <regex.h>
-#include <stdbool.h>
#include "para.h"
#include "compress_filter.cmdline.h"
#include "string.h"
#include "error.h"
-/** The size of the output data buffer. */
-#define COMPRESS_CHUNK_SIZE 40960
-
/** Data specific to the compress filter. */
struct private_compress_data {
/** The current multiplier. */
int peak;
};
-static ssize_t compress(char *inbuf, size_t inbuf_len, struct filter_node *fn)
-{
- size_t i, length = PARA_MIN((inbuf_len / 2) * 2,
- (fn->bufsize - fn->loaded) / 2 * 2);
- struct private_compress_data *pcd = fn->private_data;
- int16_t *ip = (int16_t *)inbuf, *op = (int16_t *)(fn->buf + fn->loaded);
- unsigned gain_shift = pcd->conf->inertia_arg + pcd->conf->damp_arg,
- mask = (1 << pcd->conf->blocksize_arg) - 1;
-
- if (!length)
- return 0;
- for (i = 0; i < length / 2; i++) {
- /* be careful in that heat, my dear */
- int sample = *ip++, adjusted_sample = (PARA_ABS(sample) *
- pcd->current_gain) >> gain_shift;
- if (adjusted_sample > 32767) { /* clip */
- PARA_NOTICE_LOG("clip: sample: %d, adjusted sample: %d\n",
- sample, adjusted_sample);
- adjusted_sample = 32767;
- pcd->current_gain = (3 * pcd->current_gain +
- (1 << pcd->conf->inertia_arg)) / 4;
- pcd->peak = 0;
- } else
- pcd->peak = PARA_MAX(pcd->peak, adjusted_sample);
- *op++ = sample >= 0? adjusted_sample : -adjusted_sample;
- if (++pcd->num_samples & mask)
- continue;
-// PARA_DEBUG_LOG("gain: %u, peak: %u\n", pcd->current_gain,
-// pcd->peak);
- if (pcd->peak < pcd->conf->target_level_arg) {
- if (pcd->current_gain < pcd->max_gain)
- pcd->current_gain++;
- } else
- pcd->current_gain = PARA_MAX(pcd->current_gain - 2,
- 1U << pcd->conf->inertia_arg);
- pcd->peak = 0;
- }
- fn->loaded += length;
- return length;
-}
-
-static void close_compress(struct filter_node *fn)
+static void compress_close(struct filter_node *fn)
{
free(fn->private_data);
- free(fn->buf);
}
-static void compress_post_select(__a_unused struct sched *s, struct task *t)
+static int compress_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 private_compress_data *pcd = fn->private_data;
struct btr_node *btrn = fn->btrn;
bool inplace = btr_inplace_ok(btrn);
//inplace = false;
next_buffer:
- t->error = 0;
ret = btr_node_status(btrn, fn->min_iqs, BTR_NT_INTERNAL);
if (ret < 0)
goto err;
if (ret == 0)
- return;
+ return 0;
btr_merge(btrn, fn->min_iqs);
length = btr_next_buffer(btrn, &inbuf) & ~(size_t)1;
if (length == 0) { /* eof and 1 byte available */
op = para_malloc(length);
for (i = 0; i < length / 2; i++) {
/* be careful in that heat, my dear */
- int sample = *ip++, adjusted_sample = (PARA_ABS(sample) *
- pcd->current_gain) >> gain_shift;
- if (adjusted_sample > 32767) { /* clip */
- PARA_NOTICE_LOG("clip: sample: %d, adjusted sample: %d\n",
- sample, adjusted_sample);
- adjusted_sample = 32767;
+ int sample = *ip++;
+ bool neg = false;
+
+ if (sample < 0) {
+ sample = -sample;
+ neg = true;
+ }
+ sample *= pcd->current_gain;
+ sample >>= gain_shift;
+ if (sample > 32767) { /* clip */
+ sample = 32767;
pcd->current_gain = (3 * pcd->current_gain +
(1 << pcd->conf->inertia_arg)) / 4;
pcd->peak = 0;
- } else
- pcd->peak = PARA_MAX(pcd->peak, adjusted_sample);
- op[i] = sample >= 0? adjusted_sample : -adjusted_sample;
+ } else if (sample > pcd->peak)
+ pcd->peak = sample;
+ op[i] = neg? -sample : sample;
if (++pcd->num_samples & mask)
continue;
// PARA_DEBUG_LOG("gain: %u, peak: %u\n", pcd->current_gain,
goto next_buffer;
err:
assert(ret < 0);
- t->error = ret;
- btr_remove_node(btrn);
+ btr_remove_node(&fn->btrn);
+ return ret;
}
/** TODO: Add sanity checks */
static int compress_parse_config(int argc, char **argv, void **config)
{
- int ret;
- struct compress_filter_args_info *compress_conf
- = para_calloc(sizeof(*compress_conf));
+ struct compress_filter_args_info *conf = para_calloc(sizeof(*conf));
- ret = -E_COMPRESS_SYNTAX;
- if (compress_cmdline_parser(argc, argv, compress_conf))
- goto err;
- *config = compress_conf;
+ compress_filter_cmdline_parser(argc, argv, conf);
+ *config = conf;
return 1;
-err:
- free(compress_conf);
- return ret;
}
-static void open_compress(struct filter_node *fn)
+static void compress_open(struct filter_node *fn)
{
struct private_compress_data *pcd = para_calloc(
sizeof(struct private_compress_data));
pcd->conf = fn->conf;
fn->private_data = pcd;
fn->min_iqs = 2; /* 16 bit audio */
- fn->bufsize = COMPRESS_CHUNK_SIZE;
- fn->buf = para_malloc(fn->bufsize);
pcd->current_gain = 1 << pcd->conf->inertia_arg;
pcd->max_gain = 1 << (pcd->conf->inertia_arg + pcd->conf->aggressiveness_arg);
}
+static void compress_free_config(void *conf)
+{
+ compress_filter_cmdline_parser_free(conf);
+}
+
/**
* The init function of the compress filter.
*
{
struct compress_filter_args_info dummy;
- compress_cmdline_parser_init(&dummy);
- f->open = open_compress;
- f->close = close_compress;
- f->convert = compress;
+ compress_filter_cmdline_parser_init(&dummy);
+ f->open = compress_open;
+ f->close = compress_close;
f->pre_select = generic_filter_pre_select;
f->post_select = compress_post_select;
f->parse_config = compress_parse_config;
- f->help = (struct ggo_help) {
- .short_help = compress_filter_args_info_help,
- .detailed_help = compress_filter_args_info_detailed_help
- };
+ f->free_config = compress_free_config;
+ f->help = (struct ggo_help)DEFINE_GGO_HELP(compress_filter);
}
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