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