-/*
- * Copyright (C) 2005-2011 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 oggdec_filter.c Paraslash's ogg vorbis decoder. */
#include "para.h"
#include "list.h"
#include "sched.h"
-#include "ggo.h"
#include "buffer_tree.h"
#include "filter.h"
#include "error.h"
0, /* no initial bytes */
ovc); /* the ov_open_callbacks */
if (oret == OV_ENOTVORBIS || oret == OV_EBADHEADER) {
- /* this might be due to the input buffer being too small */
+ /* maybe the input buffer is too small */
if (!btr_no_parent(btrn)) {
fn->min_iqs += 1000;
iqs = btr_get_input_queue_size(btrn);
ret = 0;
if (iqs < fn->min_iqs)
goto out;
- PARA_CRIT_LOG("iqs: %zu\n", iqs);
btr_merge(btrn, fn->min_iqs);
pod->converted = 0;
goto open;
goto out;
pod->channels = ov_info(vf, 0)->channels;
pod->sample_rate = ov_info(vf, 0)->rate;
- PARA_NOTICE_LOG("%d channels, %d Hz\n", pod->channels,
+ PARA_NOTICE_LOG("%u channels, %u Hz\n", pod->channels,
pod->sample_rate);
ret = 1;
out:
return ret;
}
+/** Suspend decoding if output queue size is larger than that. */
#define OGGDEC_MAX_OUTPUT_SIZE (96 * 1024)
+
+/**
+ * Allocate chunks of this size and produce at most one chunk of output per
+ * ->post_select() invocation. If the buffer could only be filled partially
+ * due to insufficient input being available, it is shrunk to the real output
+ * size and the resized buffer is fed into the output queue.
+ */
#define OGGDEC_OUTPUT_CHUNK_SIZE (32 * 1024)
-static void ogg_pre_select(struct sched *s, struct task *t)
+static void ogg_pre_select(struct sched *s, void *context)
{
- struct filter_node *fn = container_of(t, struct filter_node, task);
+ struct filter_node *fn = context;
struct private_oggdec_data *pod = fn->private_data;
struct btr_node *btrn = fn->btrn;
int ret;
sched_min_delay(s);
}
-static void ogg_post_select(__a_unused struct sched *s, struct task *t)
+static int ogg_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_oggdec_data *pod = fn->private_data;
struct btr_node *btrn = fn->btrn;
int ret, have;
char *buf;
ret = btr_node_status(btrn, fn->min_iqs, BTR_NT_INTERNAL);
- if (ret < 0 && ret != -E_BTR_EOF) /* fatal error */
- goto out;
- if (ret <= 0 && !pod->have_more) /* nothing to do */
+ if (ret < 0) {
+ if (ret != -E_BTR_EOF) /* fatal error */
+ goto out;
+ if (fn->min_iqs == 0 && !pod->have_more) /* EOF */
+ goto out;
+ /* last ov_read() returned OV_HOLE */
+ } else if (ret == 0 && !pod->have_more) /* nothing to do */
goto out;
+ if (btr_get_output_queue_size(btrn) > OGGDEC_MAX_OUTPUT_SIZE)
+ return 0;
if (!pod->vf) {
if (ret <= 0)
goto out;
break;
fn->min_iqs = 0;
have += ret;
- if (have < OGGDEC_OUTPUT_CHUNK_SIZE)
- continue;
- if (btr_get_output_queue_size(btrn) > OGGDEC_MAX_OUTPUT_SIZE)
+ if (have >= OGGDEC_OUTPUT_CHUNK_SIZE)
break;
- btr_add_output(buf, have, btrn);
- buf = para_malloc(OGGDEC_OUTPUT_CHUNK_SIZE);
- have = 0;
}
pod->have_more = (ret > 0);
- if (have > 0)
+ if (have > 0) {
+ if (have < OGGDEC_OUTPUT_CHUNK_SIZE)
+ buf = para_realloc(buf, have);
btr_add_output(buf, have, btrn);
- else
+ } else
free(buf);
if (ret == OV_HOLE) /* avoid buffer underruns */
fn->min_iqs = 9000;
if (ret >= 0 || ret == OV_HOLE)
- return;
+ return 0;
ret = -E_OGGDEC_BADLINK;
out:
- t->error = ret;
if (ret < 0)
- btr_remove_node(btrn);
+ btr_remove_node(&fn->btrn);
+ return ret;
}
-/**
- * The init function of the ogg vorbis decoder.
- *
- * \param f Its fields are filled in by the function.
- */
-void oggdec_filter_init(struct filter *f)
-{
- f->open = ogg_open;
- f->close = ogg_close;
- f->pre_select = ogg_pre_select;
- f->post_select = ogg_post_select;
- f->execute = oggdec_execute;
-}
+const struct filter lsg_filter_cmd_com_oggdec_user_data = {
+ .open = ogg_open,
+ .close = ogg_close,
+ .pre_select = ogg_pre_select,
+ .post_select = ogg_post_select,
+ .execute = oggdec_execute
+};