/* * Copyright (c) 2013 Jan Vesely * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup audio * @brief HelenOS sound server * @{ */ /** @file */ #ifndef AUDIO_DATA_H_ #define AUDIO_DATA_H_ #include <adt/list.h> #include <refcount.h> #include <errno.h> #include <fibril_synch.h> #include <pcm/format.h> /** Reference counted audio buffer */ typedef struct { /** Audio data */ void *data; /** Size of the buffer pointer to by data */ size_t size; /** Format of the audio data */ pcm_format_t format; /** Reference counter */ atomic_refcount_t refcount; } audio_data_t; /** Audio data pipe structure */ typedef struct { /** List of audio data buffers */ list_t list; /** Total size of all buffers */ size_t bytes; /** Total frames stored in all buffers */ size_t frames; /** List access synchronization */ fibril_mutex_t guard; } audio_pipe_t; audio_data_t *audio_data_create(void *data, size_t size, pcm_format_t format); void audio_data_addref(audio_data_t *adata); void audio_data_unref(audio_data_t *adata); void audio_pipe_init(audio_pipe_t *pipe); void audio_pipe_fini(audio_pipe_t *pipe); errno_t audio_pipe_push(audio_pipe_t *pipe, audio_data_t *data); audio_data_t *audio_pipe_pop(audio_pipe_t *pipe); size_t audio_pipe_mix_data(audio_pipe_t *pipe, void *buffer, size_t size, const pcm_format_t *f); /** * Total bytes getter. * @param pipe The audio pipe. * @return Total size of buffer stored in the pipe. */ static inline size_t audio_pipe_bytes(audio_pipe_t *pipe) { assert(pipe); return pipe->bytes; } /** * Total bytes getter. * @param pipe The audio pipe. * @return Total number of frames stored in the pipe. */ static inline size_t audio_pipe_frames(audio_pipe_t *pipe) { assert(pipe); return pipe->frames; } /** * Push data form buffer directly to pipe. * @param pipe The target pipe. * @param data audio buffer. * @param size size of the @p data buffer * @param f format of the audio data. * @return Error code. * * Reference counted buffer is created automatically. */ static inline errno_t audio_pipe_push_data(audio_pipe_t *pipe, void *data, size_t size, pcm_format_t f) { audio_data_t *adata = audio_data_create(data, size, f); if (adata) { const errno_t ret = audio_pipe_push(pipe, adata); audio_data_unref(adata); return ret; } return ENOMEM; } #endif /** * @} */