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fa499dad06
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@284 fefdeb5f-60dc-0310-8127-8f9354f1896f
98 lines
3.9 KiB
C
98 lines
3.9 KiB
C
#ifndef foomemblockqhfoo
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#define foomemblockqhfoo
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/* $Id$ */
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/***
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This file is part of polypaudio.
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polypaudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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polypaudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with polypaudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#include <sys/types.h>
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#include "memblock.h"
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#include "memchunk.h"
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struct pa_memblockq;
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/* Parameters:
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- maxlength: maximum length of queue. If more data is pushed into the queue, data from the front is dropped
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- length: the target length of the queue.
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- base: a base value for all metrics. Only multiples of this value are popped from the queue
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- prebuf: before passing the first byte out, make sure that enough bytes are in the queue
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- minreq: pa_memblockq_missing() will only return values greater than this value
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*/
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struct pa_memblockq* pa_memblockq_new(size_t maxlength,
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size_t tlength,
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size_t base,
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size_t prebuf,
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size_t minreq,
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struct pa_memblock_stat *s);
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void pa_memblockq_free(struct pa_memblockq*bq);
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/* Push a new memory chunk into the queue. Optionally specify a value for future cancellation. */
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void pa_memblockq_push(struct pa_memblockq* bq, const struct pa_memchunk *chunk, size_t delta);
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/* Same as pa_memblockq_push(), however chunks are filtered through a mcalign object, and thus aligned to multiples of base */
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void pa_memblockq_push_align(struct pa_memblockq* bq, const struct pa_memchunk *chunk, size_t delta);
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/* Return a copy of the next memory chunk in the queue. It is not removed from the queue */
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int pa_memblockq_peek(struct pa_memblockq* bq, struct pa_memchunk *chunk);
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/* Drop the specified bytes from the queue, only valid aufter pa_memblockq_peek() */
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void pa_memblockq_drop(struct pa_memblockq *bq, const struct pa_memchunk *chunk, size_t length);
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/* Drop the specified bytes from the queue */
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void pa_memblockq_skip(struct pa_memblockq *bq, size_t length);
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/* Shorten the pa_memblockq to the specified length by dropping data at the end of the queue */
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void pa_memblockq_shorten(struct pa_memblockq *bq, size_t length);
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/* Empty the pa_memblockq */
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void pa_memblockq_empty(struct pa_memblockq *bq);
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/* Test if the pa_memblockq is currently readable, that is, more data than base */
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int pa_memblockq_is_readable(struct pa_memblockq *bq);
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/* Test if the pa_memblockq is currently writable for the specified amount of bytes */
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int pa_memblockq_is_writable(struct pa_memblockq *bq, size_t length);
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/* Return the length of the queue in bytes */
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uint32_t pa_memblockq_get_length(struct pa_memblockq *bq);
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/* Return how many bytes are missing in queue to the specified fill amount */
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uint32_t pa_memblockq_missing(struct pa_memblockq *bq);
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/* Returns the minimal request value */
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uint32_t pa_memblockq_get_minreq(struct pa_memblockq *bq);
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/* Force disabling of pre-buf even when the pre-buffer is not yet filled */
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void pa_memblockq_prebuf_disable(struct pa_memblockq *bq);
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/* Reenable pre-buf to the initial level */
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void pa_memblockq_prebuf_reenable(struct pa_memblockq *bq);
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/* Manipulate the write pointer */
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void pa_memblockq_seek(struct pa_memblockq *bq, size_t delta);
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/* Flush the queue */
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void pa_memblockq_flush(struct pa_memblockq *bq);
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/* Get Target length */
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uint32_t pa_memblockq_get_tlength(struct pa_memblockq *bq);
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#endif
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