Merge branch 't/doc'

[paraslash.git] / prebuffer_filter.c

diff --git a/prebuffer_filter.c b/prebuffer_filter.c
index f23e4e578e1409fbe00891aa2521e01f119ce739..0759d678bc51ca90284108e3a5d5bc25a4c3fc4a 100644 (file)
--- a/prebuffer_filter.c
+++ b/prebuffer_filter.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2009-2013 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -13,6 +13,7 @@
 #include "list.h"
 #include "sched.h"
 #include "ggo.h"
+#include "buffer_tree.h"
 #include "filter.h"
 #include "string.h"
 #include "error.h"
@@ -27,77 +28,69 @@ struct private_prebuffer_data {
        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, 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);
        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) {
                struct timeval tv;
                PARA_INFO_LOG("prebuffer period %dms\n",
                        conf->duration_arg);
                ms2tv(conf->duration_arg, &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_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);
+       struct private_prebuffer_data *ppd = fn->private_data;
+       struct prebuffer_filter_args_info *conf = ppd->conf;
+
+       if (ppd->barrier.tv_sec == 0)
+               return 0;
+       if (tv_diff(now, &ppd->barrier, NULL) < 0)
+               return 0;
+       if (iqs < conf->size_arg)
+               return 0;
+       btr_splice_out_node(fn->btrn);
+       return -E_PREBUFFER_SUCCESS;
 }
 
 static int prebuffer_parse_config(int argc, char **argv, void **config)
 {
-       struct prebuffer_filter_args_info *prebuffer_conf
-               = para_calloc(sizeof(*prebuffer_conf));
+       struct prebuffer_filter_args_info *conf = para_calloc(sizeof(*conf));
        int ret = -E_PREBUFFER_SYNTAX;
 
-       if (prebuffer_cmdline_parser(argc, argv, prebuffer_conf))
-               goto err;
+       prebuffer_filter_cmdline_parser(argc, argv, conf);
        ret = -ERRNO_TO_PARA_ERROR(EINVAL);
-       if (prebuffer_conf->duration_arg < 0)
+       if (conf->duration_arg < 0)
                goto err;
-       if (prebuffer_conf->size_arg < 0)
+       if (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;
+       PARA_NOTICE_LOG("prebuffering %ims, %i bytes\n", conf->duration_arg,
+               conf->size_arg);
+       *config = conf;
        return 1;
 err:
-       free(prebuffer_conf);
+       free(conf);
        return ret;
 }
 
@@ -107,8 +100,11 @@ static void prebuffer_open(struct filter_node *fn)
 
        ppd->conf = fn->conf;
        fn->private_data = ppd;
-       fn->bufsize = 8192; /* gets increased on demand */
-       fn->buf = para_malloc(fn->bufsize);
+}
+
+static void prebuffer_free_config(void *conf)
+{
+       prebuffer_filter_cmdline_parser_free(conf);
 }
 
 /**
@@ -120,11 +116,13 @@ void prebuffer_filter_init(struct filter *f)
 {
        struct prebuffer_filter_args_info dummy;
 
-       prebuffer_cmdline_parser_init(&dummy);
+       prebuffer_filter_cmdline_parser_init(&dummy);
        f->open = prebuffer_open;
        f->close = prebuffer_close;
-       f->convert = prebuffer_convert;
        f->parse_config = prebuffer_parse_config;
+       f->free_config = prebuffer_free_config;
+       f->pre_select = prebuffer_pre_select;
+       f->post_select = prebuffer_post_select;
        f->help = (struct ggo_help) {
                .short_help = prebuffer_filter_args_info_help,
                .detailed_help = prebuffer_filter_args_info_detailed_help