/*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see .
*/
#include
#include
#include "af.h"
#include "audio/format.h"
#include "osdep/endian.h"
static bool test_conversion(int src_format, int dst_format)
{
if ((src_format & AF_FORMAT_PLANAR) ||
(dst_format & AF_FORMAT_PLANAR))
return false;
if (((src_format & ~AF_FORMAT_SIGN_MASK) ==
(dst_format & ~AF_FORMAT_SIGN_MASK)) &&
((src_format & AF_FORMAT_TYPE_MASK) == AF_FORMAT_I))
return true;
return false;
}
static int control(struct af_instance *af, int cmd, void *arg)
{
switch (cmd) {
case AF_CONTROL_REINIT: {
struct mp_audio *in = arg;
struct mp_audio orig_in = *in;
struct mp_audio *out = af->data;
if (!test_conversion(in->format, out->format))
return AF_DETACH;
out->rate = in->rate;
mp_audio_set_channels(out, &in->channels);
return mp_audio_config_equals(in, &orig_in) ? AF_OK : AF_FALSE;
}
case AF_CONTROL_SET_FORMAT: {
mp_audio_set_format(af->data, *(int*)arg);
return AF_OK;
}
}
return AF_UNKNOWN;
}
static void si2us(void *data, int len, int bps)
{
ptrdiff_t i = -(len * bps);
uint8_t *p = &((uint8_t *)data)[len * bps];
if (BYTE_ORDER == LITTLE_ENDIAN && bps > 1)
p += bps - 1;
if (len <= 0)
return;
do {
p[i] ^= 0x80;
} while (i += bps);
}
static int filter(struct af_instance *af, struct mp_audio *data, int flags)
{
int infmt = data->format;
int outfmt = af->data->format;
size_t len = data->samples * data->nch;
if ((infmt & AF_FORMAT_SIGN_MASK) != (outfmt & AF_FORMAT_SIGN_MASK))
si2us(data->planes[0], len, data->bps);
mp_audio_set_format(data, outfmt);
return 0;
}
static int af_open(struct af_instance *af)
{
af->control = control;
af->filter = filter;
return AF_OK;
}
const struct af_info af_info_convertsignendian = {
.info = "Convert between sample format sign",
.name = "convertsign",
.open = af_open,
.test_conversion = test_conversion,
};