-/*
- * Copyright (C) 2009 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2009 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/** \file prebuffer_filter.c Paraslash's prebuffering filter. */
#include <regex.h>
+#include <lopsub.h>
#include "para.h"
-#include "prebuffer_filter.cmdline.h"
+#include "filter_cmd.lsg.h"
#include "list.h"
#include "sched.h"
-#include "ggo.h"
+#include "buffer_tree.h"
#include "filter.h"
#include "string.h"
#include "error.h"
/** Data specific to the prebuffer filter. */
struct private_prebuffer_data {
- /** The configuration data for this instance of the filter. */
- struct prebuffer_filter_args_info *conf;
/** Number of bytes prebuffered or -1 if no longer prebuffering. */
int prebuffered;
/** End of prebuffering period. */
struct timeval barrier;
};
-static ssize_t prebuffer_convert(char *inbuf, size_t inbuf_len,
- struct filter_node *fn)
+static void prebuffer_pre_select(struct sched *s, void *context)
{
+ struct filter_node *fn = context;
+ struct btr_node *btrn = fn->btrn;
+ size_t iqs = btr_get_input_queue_size(btrn);
struct private_prebuffer_data *ppd = fn->private_data;
- struct prebuffer_filter_args_info *conf = ppd->conf;
+ struct timeval diff;
- if (inbuf_len == 0) {
- if (*fn->fc->input_error < 0 && ppd->prebuffered >= 0)
- goto prebuffer_end;
- return 0;
- }
- if (ppd->prebuffered < 0) {
- size_t copy = PARA_MIN(inbuf_len, fn->bufsize - fn->loaded);
- memcpy(fn->buf + fn->loaded, inbuf, copy);
- fn->loaded += copy;
- return copy;
- }
- if (ppd->prebuffered + inbuf_len > fn->bufsize) {
- fn->bufsize = PARA_MAX(2 * fn->bufsize,
- ppd->prebuffered + inbuf_len);
- fn->buf = para_realloc(fn->buf, fn->bufsize);
- }
- memcpy(fn->buf + ppd->prebuffered, inbuf, inbuf_len);
- if (ppd->prebuffered == 0) {
+ if (iqs == 0)
+ return;
+ if (ppd->barrier.tv_sec == 0) {
+ uint32_t duration = FILTER_CMD_OPT_UINT32_VAL(PREBUFFER,
+ DURATION, fn->lpr);
struct timeval tv;
- PARA_INFO_LOG("prebuffer period %dms\n",
- conf->duration_arg);
- ms2tv(conf->duration_arg, &tv);
+ PARA_INFO_LOG("prebuffer period %" PRIu32 "ms\n", duration);
+ ms2tv(duration, &tv);
tv_add(&tv, now, &ppd->barrier);
}
- ppd->prebuffered += inbuf_len;
- PARA_DEBUG_LOG("%d bytes prebuffered\n", ppd->prebuffered);
- if (*fn->fc->input_error >= 0) {
- struct timeval diff;
- if (tv_diff(now, &ppd->barrier, &diff) < 0)
- goto out;
- if (ppd->prebuffered < conf->size_arg)
- goto out;
- }
-prebuffer_end:
- fn->loaded = ppd->prebuffered;
- ppd->prebuffered = -1;
-out:
- return inbuf_len;
+ if (tv_diff(&ppd->barrier, now, &diff) < 0)
+ return sched_min_delay(s);
+ sched_request_timeout(&diff, s);
}
static void prebuffer_close(struct filter_node *fn)
{
free(fn->private_data);
- free(fn->buf);
}
-static int prebuffer_parse_config(int argc, char **argv, void **config)
+static int prebuffer_post_select(__a_unused struct sched *s, void *context)
{
- struct prebuffer_filter_args_info *prebuffer_conf
- = para_calloc(sizeof(*prebuffer_conf));
- int ret = -E_PREBUFFER_SYNTAX;
+ struct filter_node *fn = context;
+ struct btr_node *btrn = fn->btrn;
+ size_t iqs = btr_get_input_queue_size(btrn);
+ struct private_prebuffer_data *ppd = fn->private_data;
+ uint32_t size = FILTER_CMD_OPT_UINT32_VAL(PREBUFFER, SIZE, fn->lpr);
- if (prebuffer_cmdline_parser(argc, argv, prebuffer_conf))
- goto err;
- ret = -ERRNO_TO_PARA_ERROR(EINVAL);
- if (prebuffer_conf->duration_arg < 0)
- goto err;
- if (prebuffer_conf->size_arg < 0)
- goto err;
- PARA_NOTICE_LOG("prebuffering %ims, %i bytes\n",
- prebuffer_conf->duration_arg, prebuffer_conf->size_arg);
- *config = prebuffer_conf;
- return 1;
-err:
- free(prebuffer_conf);
- return ret;
+ if (ppd->barrier.tv_sec == 0)
+ return 0;
+ if (tv_diff(now, &ppd->barrier, NULL) < 0)
+ return 0;
+ if (iqs < size)
+ return 0;
+ btr_splice_out_node(&fn->btrn);
+ return -E_PREBUFFER_SUCCESS;
}
static void prebuffer_open(struct filter_node *fn)
{
struct private_prebuffer_data *ppd = para_calloc(sizeof(*ppd));
-
- ppd->conf = fn->conf;
fn->private_data = ppd;
- fn->bufsize = 8192; /* gets increased on demand */
- fn->buf = para_malloc(fn->bufsize);
}
-/**
- * The init function of the prebuffer filter.
- *
- * \param f Pointer to the struct to initialize.
- */
-void prebuffer_filter_init(struct filter *f)
-{
- struct prebuffer_filter_args_info dummy;
-
- prebuffer_cmdline_parser_init(&dummy);
- f->open = prebuffer_open;
- f->close = prebuffer_close;
- f->convert = prebuffer_convert;
- f->parse_config = prebuffer_parse_config;
- f->help = (struct ggo_help) {
- .short_help = prebuffer_filter_args_info_help,
- .detailed_help = prebuffer_filter_args_info_detailed_help
- };
-}
+const struct filter lsg_filter_cmd_com_prebuffer_user_data = {
+ .open = prebuffer_open,
+ .close = prebuffer_close,
+ .pre_select = prebuffer_pre_select,
+ .post_select = prebuffer_post_select,
+};