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1 /*
2 * Copyright (c) 2022 Omar Polo <op@openbsd.org>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
17 #include <sys/types.h>
18 #include <sys/queue.h>
19 #include <sys/uio.h>
21 #include <err.h>
22 #include <event.h>
23 #include <inttypes.h>
24 #include <limits.h>
25 #include <sndio.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <stdint.h>
29 #include <imsg.h>
31 #include <FLAC/stream_decoder.h>
33 #include "amused.h"
34 #include "log.h"
36 static FLAC__StreamDecoderWriteStatus
37 writecb(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame,
38 const int32_t * const *buffer, void *data)
39 {
40 static uint8_t buf[BUFSIZ];
41 int i;
42 size_t len;
44 for (i = 0, len = 0; i < frame->header.blocksize; ++i) {
45 if (len+4 >= sizeof(buf)) {
46 if (!play(buf, len))
47 goto quit;
48 }
50 buf[len++] = buffer[0][i] & 0xff;
51 buf[len++] = (buffer[0][i] >> 8) & 0xff;
53 buf[len++] = buffer[1][i] & 0xff;
54 buf[len++] = (buffer[1][i] >> 8) & 0xff;
55 }
57 if (len != 0 && !play(buf, len))
58 goto quit;
60 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
61 quit:
62 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
63 }
65 static void
66 metacb(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *meta,
67 void *d)
68 {
69 uint32_t sample_rate;
70 int channels;
72 if (meta->type == FLAC__METADATA_TYPE_STREAMINFO) {
73 sample_rate = meta->data.stream_info.sample_rate;
74 channels = meta->data.stream_info.channels;
76 if (player_setup(16, sample_rate, channels) == -1)
77 err(1, "player_setrate");
78 }
79 }
81 static void
82 errcb(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status,
83 void *data)
84 {
85 log_warnx("flac error: %s", FLAC__StreamDecoderErrorStatusString[status]);
86 }
88 void
89 play_flac(int fd)
90 {
91 FILE *f;
92 int s, ok = 1;
93 const char *state;
94 FLAC__StreamDecoder *decoder = NULL;
95 FLAC__StreamDecoderInitStatus init_status;
97 if ((f = fdopen(fd, "r")) == NULL)
98 err(1, "fdopen");
100 decoder = FLAC__stream_decoder_new();
101 if (decoder == NULL)
102 err(1, "flac stream decoder");
104 FLAC__stream_decoder_set_md5_checking(decoder, 1);
106 init_status = FLAC__stream_decoder_init_FILE(decoder, f, writecb,
107 metacb, errcb, NULL);
108 if (init_status != FLAC__STREAM_DECODER_INIT_STATUS_OK)
109 errx(1, "flac decoder: %s",
110 FLAC__StreamDecoderInitStatusString[init_status]);
112 ok = FLAC__stream_decoder_process_until_end_of_stream(decoder);
113 s = FLAC__stream_decoder_get_state(decoder);
114 if (!ok && s != FLAC__STREAM_DECODER_ABORTED) {
115 state = FLAC__StreamDecoderStateString[s];
116 log_warnx("decoding failed; state: %s", state);
119 FLAC__stream_decoder_delete(decoder);
121 fclose(f);