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[input] Add a simple input for testing timing
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/* | ||
* Copyright (C) 2020 Espen Jurgensen | ||
* | ||
* This program is free software; you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation; either version 2 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* This program is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program; if not, write to the Free Software | ||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
*/ | ||
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#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <unistd.h> | ||
#include <stdint.h> | ||
#include <string.h> | ||
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#include <event2/buffer.h> | ||
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#include "misc.h" | ||
#include "logger.h" | ||
#include "input.h" | ||
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#define TIMER_NOISE_INTERVAL 5 | ||
#define TIMER_METADATA_INTERVAL 30 | ||
#define TIMER_SAMPLE_RATE 44100 | ||
#define TIMER_BPS 16 | ||
#define TIMER_CHANNELS 2 | ||
#define TIMER_BUFSIZE (STOB(TIMER_SAMPLE_RATE, TIMER_BPS, TIMER_CHANNELS) / 20) | ||
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struct timer_ctx | ||
{ | ||
uint8_t silence[TIMER_BUFSIZE]; | ||
uint8_t noise[TIMER_BUFSIZE]; | ||
uint64_t pos; | ||
}; | ||
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static int | ||
setup(struct input_source *source) | ||
{ | ||
struct timer_ctx *ctx; | ||
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ctx = calloc(1, sizeof(struct timer_ctx)); | ||
if (!ctx) | ||
return -1; | ||
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memset(&ctx->noise, 0x88, TIMER_BUFSIZE); | ||
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CHECK_NULL(L_PLAYER, source->evbuf = evbuffer_new()); | ||
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source->quality.sample_rate = TIMER_SAMPLE_RATE; | ||
source->quality.bits_per_sample = TIMER_BPS; | ||
source->quality.channels = TIMER_CHANNELS; | ||
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source->input_ctx = ctx; | ||
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return 0; | ||
} | ||
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static int | ||
stop(struct input_source *source) | ||
{ | ||
struct timer_ctx *ctx = source->input_ctx; | ||
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free(ctx); | ||
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if (source->evbuf) | ||
evbuffer_free(source->evbuf); | ||
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source->input_ctx = NULL; | ||
source->evbuf = NULL; | ||
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return 0; | ||
} | ||
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static int | ||
play(struct input_source *source) | ||
{ | ||
struct timer_ctx *ctx = source->input_ctx; | ||
short flags; | ||
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if (ctx->pos % (TIMER_METADATA_INTERVAL * source->quality.sample_rate) == 0) | ||
flags = INPUT_FLAG_METADATA; | ||
else | ||
flags = 0; | ||
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if (ctx->pos % (TIMER_NOISE_INTERVAL * source->quality.sample_rate) == 0) | ||
evbuffer_add(source->evbuf, ctx->noise, TIMER_BUFSIZE); | ||
else | ||
evbuffer_add(source->evbuf, ctx->silence, TIMER_BUFSIZE); | ||
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ctx->pos += BTOS(TIMER_BUFSIZE, TIMER_BPS, TIMER_CHANNELS); | ||
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input_write(source->evbuf, &source->quality, flags); | ||
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return 0; | ||
} | ||
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static int | ||
metadata_get(struct input_metadata *metadata, struct input_source *source) | ||
{ | ||
metadata->title = strdup("Timing test"); | ||
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metadata->pos_is_updated = true; | ||
metadata->pos_ms = 0; | ||
metadata->len_ms = TIMER_METADATA_INTERVAL * 1000; | ||
return 0; | ||
} | ||
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struct input_definition input_timer = | ||
{ | ||
.name = "timer", | ||
.type = INPUT_TYPE_TIMER, | ||
.disabled = 0, | ||
.setup = setup, | ||
.play = play, | ||
.stop = stop, | ||
.metadata_get = metadata_get, | ||
}; | ||
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