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
12 /* This is a simple program showing how to initialize the decoder in XMA mode */
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <stdarg.h>
16 #include <string.h>
17 #define VPX_CODEC_DISABLE_COMPAT 1
18 #include "vpx_config.h"
19 #include "vpx/vpx_decoder.h"
20 #include "vpx/vpx_integer.h"
21 #if CONFIG_VP9_DECODER
22 #include "vpx/vp8dx.h"
23 #endif
24
25 static char *exec_name;
26 static int verbose = 0;
27
28 static const struct {
29 const char *name;
30 vpx_codec_iface_t *iface;
31 } ifaces[] = {
32 #if CONFIG_VP9_DECODER
33 {"vp9", &vpx_codec_vp8_dx_algo},
34 #endif
35 };
36
usage_exit(void)37 static void usage_exit(void) {
38 int i;
39
40 printf("Usage: %s <options>\n\n"
41 "Options:\n"
42 "\t--codec <name>\tCodec to use (default=%s)\n"
43 "\t-h <height>\tHeight of the simulated video frame, in pixels\n"
44 "\t-w <width> \tWidth of the simulated video frame, in pixels\n"
45 "\t-v \tVerbose mode (show individual segment sizes)\n"
46 "\t--help \tShow this message\n"
47 "\n"
48 "Included decoders:\n"
49 "\n",
50 exec_name,
51 ifaces[0].name);
52
53 for (i = 0; i < sizeof(ifaces) / sizeof(ifaces[0]); i++)
54 printf(" %-6s - %s\n",
55 ifaces[i].name,
56 vpx_codec_iface_name(ifaces[i].iface));
57
58 exit(EXIT_FAILURE);
59 }
60
usage_error(const char * fmt,...)61 static void usage_error(const char *fmt, ...) {
62 va_list ap;
63 va_start(ap, fmt);
64 vprintf(fmt, ap);
65 printf("\n");
66 usage_exit();
67 }
68
my_mem_dtor(vpx_codec_mmap_t * mmap)69 void my_mem_dtor(vpx_codec_mmap_t *mmap) {
70 if (verbose)
71 printf("freeing segment %d\n", mmap->id);
72
73 free(mmap->priv);
74 }
75
main(int argc,char ** argv)76 int main(int argc, char **argv) {
77 vpx_codec_ctx_t decoder;
78 vpx_codec_iface_t *iface = ifaces[0].iface;
79 vpx_codec_iter_t iter;
80 vpx_codec_dec_cfg_t cfg;
81 vpx_codec_err_t res = VPX_CODEC_OK;
82 unsigned int alloc_sz = 0;
83 unsigned int w = 352;
84 unsigned int h = 288;
85 int i;
86
87 exec_name = argv[0];
88
89 for (i = 1; i < argc; i++) {
90 if (!strcmp(argv[i], "--codec")) {
91 if (i + 1 < argc) {
92 int j, k = -1;
93
94 i++;
95
96 for (j = 0; j < sizeof(ifaces) / sizeof(ifaces[0]); j++)
97 if (!strcmp(ifaces[j].name, argv[i]))
98 k = j;
99
100 if (k >= 0)
101 iface = ifaces[k].iface;
102 else
103 usage_error("Error: Unrecognized argument (%s) to --codec\n",
104 argv[i]);
105 } else
106 usage_error("Error: Option --codec requires argument.\n");
107 } else if (!strcmp(argv[i], "-v"))
108 verbose = 1;
109 else if (!strcmp(argv[i], "-h"))
110 if (i + 1 < argc) {
111 h = atoi(argv[++i]);
112 } else
113 usage_error("Error: Option -h requires argument.\n");
114 else if (!strcmp(argv[i], "-w"))
115 if (i + 1 < argc) {
116 w = atoi(argv[++i]);
117 } else
118 usage_error("Error: Option -w requires argument.\n");
119 else if (!strcmp(argv[i], "--help"))
120 usage_exit();
121 else
122 usage_error("Error: Unrecognized option %s\n\n", argv[i]);
123 }
124
125 if (argc == 1)
126 printf("Using built-in defaults. For options, rerun with --help\n\n");
127
128 /* XMA mode is not supported on all decoders! */
129 if (!(vpx_codec_get_caps(iface) & VPX_CODEC_CAP_XMA)) {
130 printf("%s does not support XMA mode!\n", vpx_codec_iface_name(iface));
131 return EXIT_FAILURE;
132 }
133
134 /* The codec knows how much memory to allocate based on the size of the
135 * encoded frames. This data can be parsed from the bitstream with
136 * vpx_codec_peek_stream_info() if a bitstream is available. Otherwise,
137 * a fixed size can be used that will be the upper limit on the frame
138 * size the decoder can decode.
139 */
140 cfg.w = w;
141 cfg.h = h;
142
143 /* Initialize the decoder in XMA mode. */
144 if (vpx_codec_dec_init(&decoder, iface, &cfg, VPX_CODEC_USE_XMA)) {
145 printf("Failed to initialize decoder in XMA mode: %s\n",
146 vpx_codec_error(&decoder));
147 return EXIT_FAILURE;
148 }
149
150 /* Iterate through the list of memory maps, allocating them with the
151 * requested alignment.
152 */
153 iter = NULL;
154
155 do {
156 vpx_codec_mmap_t mmap;
157 unsigned int align;
158
159 res = vpx_codec_get_mem_map(&decoder, &mmap, &iter);
160 align = mmap.align ? mmap.align - 1 : 0;
161
162 if (!res) {
163 if (verbose)
164 printf("Allocating segment %u, size %lu, align %u %s\n",
165 mmap.id, mmap.sz, mmap.align,
166 mmap.flags & VPX_CODEC_MEM_ZERO ? "(ZEROED)" : "");
167
168 if (mmap.flags & VPX_CODEC_MEM_ZERO)
169 mmap.priv = calloc(1, mmap.sz + align);
170 else
171 mmap.priv = malloc(mmap.sz + align);
172
173 mmap.base = (void *)((((uintptr_t)mmap.priv) + align) &
174 ~(uintptr_t)align);
175 mmap.dtor = my_mem_dtor;
176 alloc_sz += mmap.sz + align;
177
178 if (vpx_codec_set_mem_map(&decoder, &mmap, 1)) {
179 printf("Failed to set mmap: %s\n", vpx_codec_error(&decoder));
180 return EXIT_FAILURE;
181 }
182 } else if (res != VPX_CODEC_LIST_END) {
183 printf("Failed to get mmap: %s\n", vpx_codec_error(&decoder));
184 return EXIT_FAILURE;
185 }
186 } while (res != VPX_CODEC_LIST_END);
187
188 printf("%s\n %d bytes external memory required for %dx%d.\n",
189 decoder.name, alloc_sz, cfg.w, cfg.h);
190 vpx_codec_destroy(&decoder);
191 return EXIT_SUCCESS;
192
193 }
194