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[input] Add a simple input for testing timing

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ejurgensen
2020-05-12 20:16:44 +02:00
parent c1fad30df0
commit 360e46683b
5 changed files with 137 additions and 1 deletions
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127
src/inputs/timer.c Normal file
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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
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdint.h>
#include <string.h>
#include <event2/buffer.h>
#include "misc.h"
#include "logger.h"
#include "input.h"
#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)
struct timer_ctx
{
uint8_t silence[TIMER_BUFSIZE];
uint8_t noise[TIMER_BUFSIZE];
uint64_t pos;
};
static int
setup(struct input_source *source)
{
struct timer_ctx *ctx;
ctx = calloc(1, sizeof(struct timer_ctx));
if (!ctx)
return -1;
memset(&ctx->noise, 0x88, TIMER_BUFSIZE);
CHECK_NULL(L_PLAYER, source->evbuf = evbuffer_new());
source->quality.sample_rate = TIMER_SAMPLE_RATE;
source->quality.bits_per_sample = TIMER_BPS;
source->quality.channels = TIMER_CHANNELS;
source->input_ctx = ctx;
return 0;
}
static int
stop(struct input_source *source)
{
struct timer_ctx *ctx = source->input_ctx;
free(ctx);
if (source->evbuf)
evbuffer_free(source->evbuf);
source->input_ctx = NULL;
source->evbuf = NULL;
return 0;
}
static int
play(struct input_source *source)
{
struct timer_ctx *ctx = source->input_ctx;
short flags;
if (ctx->pos % (TIMER_METADATA_INTERVAL * source->quality.sample_rate) == 0)
flags = INPUT_FLAG_METADATA;
else
flags = 0;
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);
ctx->pos += BTOS(TIMER_BUFSIZE, TIMER_BPS, TIMER_CHANNELS);
input_write(source->evbuf, &source->quality, flags);
return 0;
}
static int
metadata_get(struct input_metadata *metadata, struct input_source *source)
{
metadata->title = strdup("Timing test");
metadata->pos_is_updated = true;
metadata->pos_ms = 0;
metadata->len_ms = TIMER_METADATA_INTERVAL * 1000;
return 0;
}
struct input_definition input_timer =
{
.name = "timer",
.type = INPUT_TYPE_TIMER,
.disabled = 0,
.setup = setup,
.play = play,
.stop = stop,
.metadata_get = metadata_get,
};