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/*
* Copyright 2014 Boris Timofeev <mashin87@gmail.com>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "../comment.h"
#include "../debug.h"
#include "../ip.h"
#include "../utils.h"
#include "../xmalloc.h"
#include <ayemu.h>
#include <string.h>
struct vtx_private {
ayemu_ay_t ay;
ayemu_ay_reg_frame_t regs;
ayemu_vtx_t *vtx;
int pos;
int left;
};
static const int sample_rate = 44100;
static const int channels = 2;
static const int bits = 16;
static int vtx_open(struct input_plugin_data *ip_data)
{
struct vtx_private *priv;
priv = xnew(struct vtx_private, 1);
ip_data->private = priv;
priv->vtx = ayemu_vtx_load_from_file(ip_data->filename);
if (!priv->vtx) {
d_print("error: failed to open file %s\n", ip_data->filename);
free(priv);
return -IP_ERROR_INTERNAL;
}
ayemu_init(&priv->ay);
ayemu_set_sound_format(&priv->ay, sample_rate, channels, bits);
ayemu_set_chip_type(&priv->ay, priv->vtx->chiptype, NULL);
ayemu_set_chip_freq(&priv->ay, priv->vtx->chipFreq);
ayemu_set_stereo(&priv->ay, priv->vtx->stereo, NULL);
ip_data->sf = sf_bits(bits) | sf_rate(sample_rate) | sf_channels(channels) | sf_signed(1);
ip_data->sf |= sf_host_endian();
channel_map_init_stereo(ip_data->channel_map);
priv->pos = 0;
priv->left = 0;
return 0;
}
static int vtx_close(struct input_plugin_data *ip_data)
{
struct vtx_private *priv = ip_data->private;
ayemu_vtx_free(priv->vtx);
free(priv);
ip_data->private = NULL;
return 0;
}
static int vtx_read(struct input_plugin_data *ip_data, char *buffer, int count)
{
struct vtx_private *priv = ip_data->private;
int need = count;
int donow = 0;
while (need > 0) {
if (priv->left > 0) {
donow = min_i(need, priv->left);
buffer = ayemu_gen_sound(&priv->ay, (char *)buffer, donow);
priv->left -= donow;
need -= donow;
} else {
if (priv->pos >= priv->vtx->frames)
return 0;
ayemu_vtx_getframe(priv->vtx, priv->pos++, priv->regs);
ayemu_set_regs(&priv->ay, priv->regs);
priv->left = (sample_rate / priv->vtx->playerFreq) * (channels * bits / 8);
}
}
return count;
}
static int vtx_seek(struct input_plugin_data *ip_data, double offset)
{
struct vtx_private *priv = ip_data->private;
int sample = sample_rate * offset;
int samples_per_frame = sample_rate / priv->vtx->playerFreq;
priv->pos = sample / samples_per_frame;
if (priv->pos >= priv->vtx->frames) {
return 0;
}
ayemu_vtx_getframe(priv->vtx, priv->pos, priv->regs);
priv->left = samples_per_frame - (sample % samples_per_frame);
return 0;
}
static int vtx_read_comments(struct input_plugin_data *ip_data, struct keyval **comments)
{
struct vtx_private *priv = ip_data->private;
GROWING_KEYVALS(c);
const char *str;
str = priv->vtx->author;
if (str && str[0])
comments_add_const(&c, "artist", str);
str = priv->vtx->from;
if (str && str[0])
comments_add_const(&c, "album", str);
str = priv->vtx->title;
if (str && str[0])
comments_add_const(&c, "title", str);
int year = priv->vtx->year;
if (year > 0) {
char buf[16] = {0};
snprintf(buf, sizeof buf, "%d", year);
comments_add_const(&c, "date", buf);
}
str = priv->vtx->comment;
if (str && str[0])
comments_add_const(&c, "comment", str);
keyvals_terminate(&c);
*comments = c.keyvals;
return 0;
}
static int vtx_duration(struct input_plugin_data *ip_data)
{
struct vtx_private *priv = ip_data->private;
return (int)(priv->vtx->frames / priv->vtx->playerFreq);
}
static long vtx_bitrate(struct input_plugin_data *ip_data)
{
return -IP_ERROR_FUNCTION_NOT_SUPPORTED;
}
static long vtx_current_bitrate(struct input_plugin_data *ip_data)
{
return -IP_ERROR_FUNCTION_NOT_SUPPORTED;
}
static char *vtx_codec(struct input_plugin_data *ip_data)
{
return xstrdup("vtx");
}
static char *vtx_codec_profile(struct input_plugin_data *ip_data)
{
return NULL;
}
const struct input_plugin_ops ip_ops = {
.open = vtx_open,
.close = vtx_close,
.read = vtx_read,
.seek = vtx_seek,
.read_comments = vtx_read_comments,
.duration = vtx_duration,
.bitrate = vtx_bitrate,
.bitrate_current = vtx_current_bitrate,
.codec = vtx_codec,
.codec_profile = vtx_codec_profile
};
const int ip_priority = 50;
const char * const ip_extensions[] = {"vtx", NULL};
const char * const ip_mime_types[] = { NULL };
const struct input_plugin_opt ip_options[] = { { NULL } };
const unsigned ip_abi_version = IP_ABI_VERSION;
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