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/* Copyright (C) 2010-2020 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (trans_stream_pipe.c).
* ---------------------------------------------------------------------------------------
*
* Permission is hereby granted, free of charge,
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdlib.h>
#include <string.h>
#include <streams/trans_stream.h>
struct pipe_trans_stream
{
const uint8_t *in;
uint8_t *out;
uint32_t in_size, out_size;
};
static void *pipe_stream_new(void)
{
struct pipe_trans_stream *stream =
(struct pipe_trans_stream*)malloc(sizeof(*stream));
if (!stream)
return NULL;
stream->in = NULL;
stream->out = NULL;
stream->in_size = 0;
stream->out_size = 0;
return stream;
}
static void pipe_stream_free(void *data)
{
free(data);
}
static void pipe_set_in(void *data, const uint8_t *in, uint32_t in_size)
{
struct pipe_trans_stream *p = (struct pipe_trans_stream *) data;
if (!p)
return;
p->in = in;
p->in_size = in_size;
}
static void pipe_set_out(void *data, uint8_t *out, uint32_t out_size)
{
struct pipe_trans_stream *p = (struct pipe_trans_stream *) data;
if (!p)
return;
p->out = out;
p->out_size = out_size;
}
static bool pipe_trans(
void *data, bool flush,
uint32_t *rd, uint32_t *wn,
enum trans_stream_error *error)
{
struct pipe_trans_stream *p = (struct pipe_trans_stream *) data;
if (p->out_size < p->in_size)
{
memcpy(p->out, p->in, p->out_size);
*rd = *wn = p->out_size;
p->in += p->out_size;
p->out += p->out_size;
*error = TRANS_STREAM_ERROR_BUFFER_FULL;
return false;
}
memcpy(p->out, p->in, p->in_size);
*rd = *wn = p->in_size;
p->in += p->in_size;
p->out += p->in_size;
*error = TRANS_STREAM_ERROR_NONE;
return true;
}
const struct trans_stream_backend pipe_backend = {
"pipe",
&pipe_backend,
pipe_stream_new,
pipe_stream_free,
NULL,
pipe_set_in,
pipe_set_out,
pipe_trans
};
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