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3719602c PC |
1 | /* Copyright (C) 2010-2020 The RetroArch team |
2 | * | |
3 | * --------------------------------------------------------------------------------------- | |
4 | * The following license statement only applies to this file (trans_stream_pipe.c). | |
5 | * --------------------------------------------------------------------------------------- | |
6 | * | |
7 | * Permission is hereby granted, free of charge, | |
8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), | |
9 | * to deal in the Software without restriction, including without limitation the rights to | |
10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, | |
11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, | |
16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
21 | */ | |
22 | ||
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | ||
26 | #include <streams/trans_stream.h> | |
27 | ||
28 | struct pipe_trans_stream | |
29 | { | |
30 | const uint8_t *in; | |
31 | uint8_t *out; | |
32 | uint32_t in_size, out_size; | |
33 | }; | |
34 | ||
35 | static void *pipe_stream_new(void) | |
36 | { | |
37 | struct pipe_trans_stream *stream = | |
38 | (struct pipe_trans_stream*)malloc(sizeof(*stream)); | |
39 | if (!stream) | |
40 | return NULL; | |
41 | ||
42 | stream->in = NULL; | |
43 | stream->out = NULL; | |
44 | stream->in_size = 0; | |
45 | stream->out_size = 0; | |
46 | ||
47 | return stream; | |
48 | } | |
49 | ||
50 | static void pipe_stream_free(void *data) | |
51 | { | |
52 | free(data); | |
53 | } | |
54 | ||
55 | static void pipe_set_in(void *data, const uint8_t *in, uint32_t in_size) | |
56 | { | |
57 | struct pipe_trans_stream *p = (struct pipe_trans_stream *) data; | |
58 | ||
59 | if (!p) | |
60 | return; | |
61 | ||
62 | p->in = in; | |
63 | p->in_size = in_size; | |
64 | } | |
65 | ||
66 | static void pipe_set_out(void *data, uint8_t *out, uint32_t out_size) | |
67 | { | |
68 | struct pipe_trans_stream *p = (struct pipe_trans_stream *) data; | |
69 | ||
70 | if (!p) | |
71 | return; | |
72 | ||
73 | p->out = out; | |
74 | p->out_size = out_size; | |
75 | } | |
76 | ||
77 | static bool pipe_trans( | |
78 | void *data, bool flush, | |
79 | uint32_t *rd, uint32_t *wn, | |
80 | enum trans_stream_error *error) | |
81 | { | |
82 | struct pipe_trans_stream *p = (struct pipe_trans_stream *) data; | |
83 | ||
84 | if (p->out_size < p->in_size) | |
85 | { | |
86 | memcpy(p->out, p->in, p->out_size); | |
87 | *rd = *wn = p->out_size; | |
88 | p->in += p->out_size; | |
89 | p->out += p->out_size; | |
90 | *error = TRANS_STREAM_ERROR_BUFFER_FULL; | |
91 | return false; | |
92 | } | |
93 | ||
94 | memcpy(p->out, p->in, p->in_size); | |
95 | *rd = *wn = p->in_size; | |
96 | p->in += p->in_size; | |
97 | p->out += p->in_size; | |
98 | *error = TRANS_STREAM_ERROR_NONE; | |
99 | return true; | |
100 | } | |
101 | ||
102 | const struct trans_stream_backend pipe_backend = { | |
103 | "pipe", | |
104 | &pipe_backend, | |
105 | pipe_stream_new, | |
106 | pipe_stream_free, | |
107 | NULL, | |
108 | pipe_set_in, | |
109 | pipe_set_out, | |
110 | pipe_trans | |
111 | }; |