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96 lines
2.9 KiB
96 lines
2.9 KiB
5 years ago
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/*
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Calf Box, an open source musical instrument.
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Copyright (C) 2010-2013 Krzysztof Foltman
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef CBOX_PREFETCH_PIPE_H
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#define CBOX_PREFETCH_PIPE_H
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#include <assert.h>
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#include <glib.h>
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#include <pthread.h>
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#include <sndfile.h>
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#include <stdint.h>
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#include <tarfile.h>
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#define PIPE_MIN_PREFETCH_SIZE_FRAMES 2048
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struct cbox_waveform;
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enum cbox_prefetch_pipe_state
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{
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pps_free,
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pps_opening,
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pps_active,
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pps_finished,
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pps_error,
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pps_closing,
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pps_closed,
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};
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struct cbox_prefetch_pipe
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{
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union {
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volatile enum cbox_prefetch_pipe_state state;
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uint64_t atomic1;
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};
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struct cbox_waveform *waveform;
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struct cbox_tarfile_sndstream sndstream;
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int16_t *data;
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uint32_t buffer_size;
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uint32_t min_buffer_frames;
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SF_INFO info;
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SNDFILE *sndfile;
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uint32_t file_pos_frame;
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uint32_t file_loop_start;
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uint32_t file_loop_end;
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uint32_t buffer_loop_end;
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uint32_t play_count, loop_count;
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size_t write_ptr;
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size_t produced;
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size_t consumed;
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gboolean finished;
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gboolean returned;
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};
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extern void cbox_prefetch_pipe_init(struct cbox_prefetch_pipe *pipe, uint32_t buffer_size, uint32_t min_buffer_frames);
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extern void cbox_prefetch_pipe_consumed(struct cbox_prefetch_pipe *pipe, uint32_t frames);
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extern void cbox_prefetch_pipe_close(struct cbox_prefetch_pipe *pipe);
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static inline uint32_t cbox_prefetch_pipe_get_remaining(struct cbox_prefetch_pipe *pipe)
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{
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assert(pipe->consumed <= pipe->produced);
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return pipe->produced - pipe->consumed;
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}
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struct cbox_prefetch_stack
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{
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struct cbox_prefetch_pipe *pipes;
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int *next_free_pipe;
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int pipe_count;
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pthread_t thr_prefetch;
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int last_free_pipe;
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gboolean finished;
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};
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extern struct cbox_prefetch_stack *cbox_prefetch_stack_new(int npipes, uint32_t buffer_size, uint32_t min_buffer_frames);
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extern struct cbox_prefetch_pipe *cbox_prefetch_stack_pop(struct cbox_prefetch_stack *stack, struct cbox_waveform *waveform, uint32_t file_loop_start, uint32_t file_loop_end, uint32_t loop_count);
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extern void cbox_prefetch_stack_push(struct cbox_prefetch_stack *stack, struct cbox_prefetch_pipe *pipe);
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extern int cbox_prefetch_stack_get_active_pipe_count(struct cbox_prefetch_stack *stack);
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extern void cbox_prefetch_stack_destroy(struct cbox_prefetch_stack *stack);
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#endif
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