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/*
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 * Copyright (c) 2022 Omar Polo <op@openbsd.org>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/uio.h>
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#include <err.h>
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#include <event.h>
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#include <fcntl.h>
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#include <math.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <imsg.h>
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#include <unistd.h>
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#include <opusfile.h>
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#include "amused.h"
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#include "log.h"
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#ifndef nitems
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#define nitems(x) (sizeof(x)/sizeof(x[0]))
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#endif
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int
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play_opus(int fd)
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{
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	static uint16_t pcm[BUFSIZ];
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	static uint8_t out[BUFSIZ * 2];
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	OggOpusFile *of;
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	void *f;
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	int r, ret = 0;
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	OpusFileCallbacks cb = {NULL, NULL, NULL, NULL};
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	int i, li, prev_li = -1;
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	if ((f = op_fdopen(&cb, fd, "r")) == NULL)
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		err(1, "fdopen");
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	of = op_open_callbacks(f, &cb, NULL, 0, &r);
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	if (of == NULL) {
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		fclose(f);
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		return -1;
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	}
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	for (;;) {
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		/* NB: will downmix multichannels files into two channels */
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		r = op_read_stereo(of, pcm, nitems(pcm));
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		if (r == OP_HOLE) /* corrupt file segment? */
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			continue;
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		if (r < 0) {
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			log_warnx("error %d decoding file", ret);
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			ret = -1;
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			break;
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		}
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		if (r == 0)
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			break; /* eof */
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		li = op_current_link(of);
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		if (li != prev_li) {
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			const OpusHead *head;
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			prev_li = li;
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			head = op_head(of, li);
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			if (head->input_sample_rate &&
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			    player_setup(16, head->input_sample_rate, 2) == -1)
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				err(1, "player_setup");
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		}
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		for (i = 0; i < 2*r; ++i) {
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			out[2*i+0] = pcm[i] & 0xFF;
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			out[2*i+1] = (pcm[i] >> 8) & 0xFF;
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		}
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		if (!play(out, 4*r)) {
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			ret = 1;
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			break;
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		}
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	}
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	op_free(of);
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	return ret;
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}