1 /*
2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 /*!\file
12  * \brief Provides the high level interface to wrap decoder algorithms.
13  *
14  */
15 
16 #define INLINE __inline
17 
18 #if 0
19 #define SAVE_STATUS(ctx, var) (ctx ? (ctx->err = var) : var)
20 
21 int vpx_codec_version(void) { return VERSION_PACKED; }
22 
23 const char *vpx_codec_version_str(void) { return VERSION_STRING_NOSP; }
24 
25 const char *vpx_codec_version_extra_str(void) { return VERSION_EXTRA; }
26 
27 const char *vpx_codec_iface_name(vpx_codec_iface_t *iface) {
28   return iface ? iface->name : "<invalid interface>";
29 }
30 
31 const char *vpx_codec_err_to_string(vpx_codec_err_t err) {
32   switch (err) {
33     case VPX_CODEC_OK: return "Success";
34     case VPX_CODEC_ERROR: return "Unspecified internal error";
35     case VPX_CODEC_MEM_ERROR: return "Memory allocation error";
36     case VPX_CODEC_ABI_MISMATCH: return "ABI version mismatch";
37     case VPX_CODEC_INCAPABLE:
38       return "Codec does not implement requested capability";
39     case VPX_CODEC_UNSUP_BITSTREAM:
40       return "Bitstream not supported by this decoder";
41     case VPX_CODEC_UNSUP_FEATURE:
42       return "Bitstream required feature not supported by this decoder";
43     case VPX_CODEC_CORRUPT_FRAME: return "Corrupt frame detected";
44     case VPX_CODEC_INVALID_PARAM: return "Invalid parameter";
45     case VPX_CODEC_LIST_END: return "End of iterated list";
46   }
47 
48   return "Unrecognized error code";
49 }
50 
51 const char *vpx_codec_error(vpx_codec_ctx_t *ctx) {
52   return (ctx) ? vpx_codec_err_to_string(ctx->err)
53                : vpx_codec_err_to_string(VPX_CODEC_INVALID_PARAM);
54 }
55 
56 const char *vpx_codec_error_detail(vpx_codec_ctx_t *ctx) {
57   if (ctx && ctx->err)
58     return ctx->priv ? ctx->priv->err_detail : ctx->err_detail;
59 
60   return NULL;
61 }
62 
63 vpx_codec_err_t vpx_codec_destroy(vpx_codec_ctx_t *ctx) {
64   vpx_codec_err_t res;
65 
66   if (!ctx)
67     res = VPX_CODEC_INVALID_PARAM;
68   else if (!ctx->iface || !ctx->priv)
69     res = VPX_CODEC_ERROR;
70   else {
71     ctx->iface->destroy((vpx_codec_alg_priv_t *)ctx->priv);
72 
73     ctx->iface = NULL;
74     ctx->name = NULL;
75     ctx->priv = NULL;
76     res = VPX_CODEC_OK;
77   }
78 
79   return SAVE_STATUS(ctx, res);
80 }
81 
82 vpx_codec_caps_t vpx_codec_get_caps(vpx_codec_iface_t *iface) {
83   return (iface) ? iface->caps : 0;
84 }
85 
86 vpx_codec_err_t vpx_codec_control_(vpx_codec_ctx_t *ctx, int ctrl_id, ...) {
87   vpx_codec_err_t res;
88 
89   if (!ctx || !ctrl_id)
90     res = VPX_CODEC_INVALID_PARAM;
91   else if (!ctx->iface || !ctx->priv || !ctx->iface->ctrl_maps)
92     res = VPX_CODEC_ERROR;
93   else {
94     vpx_codec_ctrl_fn_map_t *entry;
95 
96     res = VPX_CODEC_INCAPABLE;
97 
98     for (entry = ctx->iface->ctrl_maps; entry && entry->fn; entry++) {
99       if (!entry->ctrl_id || entry->ctrl_id == ctrl_id) {
100         va_list ap;
101 
102         va_start(ap, ctrl_id);
103         res = entry->fn((vpx_codec_alg_priv_t *)ctx->priv, ap);
104         va_end(ap);
105         break;
106       }
107     }
108   }
109 
110   return SAVE_STATUS(ctx, res);
111 }
112 
113 void vpx_internal_error(struct vpx_internal_error_info *info,
114                         vpx_codec_err_t error, const char *fmt, ...) {
115   va_list ap;
116 
117   info->error_code = error;
118   info->has_detail = 0;
119 
120   if (fmt) {
121     size_t sz = sizeof(info->detail);
122 
123     info->has_detail = 1;
124     va_start(ap, fmt);
125     vsnprintf(info->detail, sz - 1, fmt, ap);
126     va_end(ap);
127     info->detail[sz - 1] = '\0';
128   }
129 
130   if (info->setjmp) longjmp(info->jmp, info->error_code);
131 }
132 #endif
133