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 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 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 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 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
