libvpx: Add VP9 decoder.

source/libvpx/example_xma.c

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 
 /* This is a simple program showing how to initialize the decoder in XMA mode */
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
 #include <string.h>
 #define VPX_CODEC_DISABLE_COMPAT 1
 #include "vpx_config.h"
 #include "vpx/vpx_decoder.h"
 #include "vpx/vpx_integer.h"
-#if CONFIG_VP8_DECODER
+#if CONFIG_VP9_DECODER
 #include "vpx/vp8dx.h"
 #endif
 
 static char *exec_name;
 static int   verbose = 0;
 
-static const struct
-{
-    const char *name;
-    const vpx_codec_iface_t *iface;
-} ifaces[] =
-{
-#if CONFIG_VP8_DECODER
-    {"vp8",  &vpx_codec_vp8_dx_algo},
+static const struct {
+  const char *name;
+  const vpx_codec_iface_t *iface;
+} ifaces[] = {
+#if CONFIG_VP9_DECODER
+  {"vp9",  &vpx_codec_vp8_dx_algo},
 #endif
 };
 
-static void usage_exit(void)
-{
-    int i;
+static void usage_exit(void) {
+  int i;
 
-    printf("Usage: %s <options>\n\n"
-           "Options:\n"
-           "\t--codec <name>\tCodec to use (default=%s)\n"
-           "\t-h <height>\tHeight of the simulated video frame, in pixels\n"
-           "\t-w <width> \tWidth of the simulated video frame, in pixels\n"
-           "\t-v         \tVerbose mode (show individual segment sizes)\n"
-           "\t--help     \tShow this message\n"
-           "\n"
-           "Included decoders:\n"
-           "\n",
-           exec_name,
-           ifaces[0].name);
+  printf("Usage: %s <options>\n\n"
+         "Options:\n"
+         "\t--codec <name>\tCodec to use (default=%s)\n"
+         "\t-h <height>\tHeight of the simulated video frame, in pixels\n"
+         "\t-w <width> \tWidth of the simulated video frame, in pixels\n"
+         "\t-v         \tVerbose mode (show individual segment sizes)\n"
+         "\t--help     \tShow this message\n"
+         "\n"
+         "Included decoders:\n"
+         "\n",
+         exec_name,
+         ifaces[0].name);
 
-    for (i = 0; i < sizeof(ifaces) / sizeof(ifaces[0]); i++)
-        printf("    %-6s - %s\n",
-               ifaces[i].name,
-               vpx_codec_iface_name(ifaces[i].iface));
+  for (i = 0; i < sizeof(ifaces) / sizeof(ifaces[0]); i++)
+    printf("    %-6s - %s\n",
+           ifaces[i].name,
+           vpx_codec_iface_name(ifaces[i].iface));
 
-    exit(EXIT_FAILURE);
+  exit(EXIT_FAILURE);
 }
 
-static void usage_error(const char *fmt, ...)
-{
-    va_list ap;
-    va_start(ap, fmt);
-    vprintf(fmt, ap);
-    printf("\n");
-    usage_exit();
+static void usage_error(const char *fmt, ...) {
+  va_list ap;
+  va_start(ap, fmt);
+  vprintf(fmt, ap);
+  printf("\n");
+  usage_exit();
 }
 
-void my_mem_dtor(vpx_codec_mmap_t *mmap)
-{
-    if (verbose)
-        printf("freeing segment %d\n", mmap->id);
+void my_mem_dtor(vpx_codec_mmap_t *mmap) {
+  if (verbose)
+    printf("freeing segment %d\n", mmap->id);
 
-    free(mmap->priv);
+  free(mmap->priv);
 }
 
-int main(int argc, char **argv)
-{
-    vpx_codec_ctx_t           decoder;
-    vpx_codec_iface_t        *iface = ifaces[0].iface;
-    vpx_codec_iter_t          iter;
-    vpx_codec_dec_cfg_t       cfg;
-    vpx_codec_err_t           res = VPX_CODEC_OK;
-    unsigned int            alloc_sz = 0;
-    unsigned int            w = 352;
-    unsigned int            h = 288;
-    int                     i;
+int main(int argc, char **argv) {
+  vpx_codec_ctx_t           decoder;
+  vpx_codec_iface_t        *iface = ifaces[0].iface;
+  vpx_codec_iter_t          iter;
+  vpx_codec_dec_cfg_t       cfg;
+  vpx_codec_err_t           res = VPX_CODEC_OK;
+  unsigned int            alloc_sz = 0;
+  unsigned int            w = 352;
+  unsigned int            h = 288;
+  int                     i;
 
-    exec_name = argv[0];
+  exec_name = argv[0];
 
-    for (i = 1; i < argc; i++)
-    {
-        if (!strcmp(argv[i], "--codec"))
-        {
-            if (i + 1 < argc)
-            {
-                int j, k = -1;
+  for (i = 1; i < argc; i++) {
+    if (!strcmp(argv[i], "--codec")) {
+      if (i + 1 < argc) {
+        int j, k = -1;
 
-                i++;
+        i++;
 
-                for (j = 0; j < sizeof(ifaces) / sizeof(ifaces[0]); j++)
-                    if (!strcmp(ifaces[j].name, argv[i]))
-                        k = j;
+        for (j = 0; j < sizeof(ifaces) / sizeof(ifaces[0]); j++)
+          if (!strcmp(ifaces[j].name, argv[i]))
+            k = j;
 
-                if (k >= 0)
-                    iface = ifaces[k].iface;
-                else
-                    usage_error("Error: Unrecognized argument (%s) to --codec\n",
-                                argv[i]);
-            }
-            else
-                usage_error("Error: Option --codec requires argument.\n");
-        }
-        else if (!strcmp(argv[i], "-v"))
-            verbose = 1;
-        else if (!strcmp(argv[i], "-h"))
-            if (i + 1 < argc)
-            {
-                h = atoi(argv[++i]);
-            }
-            else
-                usage_error("Error: Option -h requires argument.\n");
-        else if (!strcmp(argv[i], "-w"))
-            if (i + 1 < argc)
-            {
-                w = atoi(argv[++i]);
-            }
-            else
-                usage_error("Error: Option -w requires argument.\n");
-        else if (!strcmp(argv[i], "--help"))
-            usage_exit();
+        if (k >= 0)
+          iface = ifaces[k].iface;
         else
-            usage_error("Error: Unrecognized option %s\n\n", argv[i]);
+          usage_error("Error: Unrecognized argument (%s) to --codec\n",
+                      argv[i]);
+      } else
+        usage_error("Error: Option --codec requires argument.\n");
+    } else if (!strcmp(argv[i], "-v"))
+      verbose = 1;
+    else if (!strcmp(argv[i], "-h"))
+      if (i + 1 < argc) {
+        h = atoi(argv[++i]);
+      } else
+        usage_error("Error: Option -h requires argument.\n");
+    else if (!strcmp(argv[i], "-w"))
+      if (i + 1 < argc) {
+        w = atoi(argv[++i]);
+      } else
+        usage_error("Error: Option -w requires argument.\n");
+    else if (!strcmp(argv[i], "--help"))
+      usage_exit();
+    else
+      usage_error("Error: Unrecognized option %s\n\n", argv[i]);
+  }
+
+  if (argc == 1)
+    printf("Using built-in defaults. For options, rerun with --help\n\n");
+
+  /* XMA mode is not supported on all decoders! */
+  if (!(vpx_codec_get_caps(iface) & VPX_CODEC_CAP_XMA)) {
+    printf("%s does not support XMA mode!\n", vpx_codec_iface_name(iface));
+    return EXIT_FAILURE;
+  }
+
+  /* The codec knows how much memory to allocate based on the size of the
+   * encoded frames. This data can be parsed from the bitstream with
+   * vpx_codec_peek_stream_info() if a bitstream is available. Otherwise,
+   * a fixed size can be used that will be the upper limit on the frame
+   * size the decoder can decode.
+   */
+  cfg.w = w;
+  cfg.h = h;
+
+  /* Initialize the decoder in XMA mode. */
+  if (vpx_codec_dec_init(&decoder, iface, &cfg, VPX_CODEC_USE_XMA)) {
+    printf("Failed to initialize decoder in XMA mode: %s\n", vpx_codec_error(&decoder));
+    return EXIT_FAILURE;
+  }
+
+  /* Iterate through the list of memory maps, allocating them with the
+   * requested alignment.
+   */
+  iter = NULL;
+
+  do {
+    vpx_codec_mmap_t  mmap;
+    unsigned int    align;
+
+    res = vpx_codec_get_mem_map(&decoder, &mmap, &iter);
+    align = mmap.align ? mmap.align - 1 : 0;
+
+    if (!res) {
+      if (verbose)
+        printf("Allocating segment %u, size %lu, align %u %s\n",
+               mmap.id, mmap.sz, mmap.align,
+               mmap.flags & VPX_CODEC_MEM_ZERO ? "(ZEROED)" : "");
+
+      if (mmap.flags & VPX_CODEC_MEM_ZERO)
+        mmap.priv = calloc(1, mmap.sz + align);
+      else
+        mmap.priv = malloc(mmap.sz + align);
+
+      mmap.base = (void *)((((uintptr_t)mmap.priv) + align) & ~(uintptr_t)align);
+      mmap.dtor = my_mem_dtor;
+      alloc_sz += mmap.sz + align;
+
+      if (vpx_codec_set_mem_map(&decoder, &mmap, 1)) {
+        printf("Failed to set mmap: %s\n", vpx_codec_error(&decoder));
+        return EXIT_FAILURE;
+      }
+    } else if (res != VPX_CODEC_LIST_END) {
+      printf("Failed to get mmap: %s\n", vpx_codec_error(&decoder));
+      return EXIT_FAILURE;
     }
+  } while (res != VPX_CODEC_LIST_END);
 
-    if (argc == 1)
-        printf("Using built-in defaults. For options, rerun with --help\n\n");
-
-    /* XMA mode is not supported on all decoders! */
-    if (!(vpx_codec_get_caps(iface) & VPX_CODEC_CAP_XMA))
-    {
-        printf("%s does not support XMA mode!\n", vpx_codec_iface_name(iface));
-        return EXIT_FAILURE;
-    }
-
-    /* The codec knows how much memory to allocate based on the size of the
-     * encoded frames. This data can be parsed from the bitstream with
-     * vpx_codec_peek_stream_info() if a bitstream is available. Otherwise,
-     * a fixed size can be used that will be the upper limit on the frame
-     * size the decoder can decode.
-     */
-    cfg.w = w;
-    cfg.h = h;
-
-    /* Initialize the decoder in XMA mode. */
-    if (vpx_codec_dec_init(&decoder, iface, &cfg, VPX_CODEC_USE_XMA))
-    {
-        printf("Failed to initialize decoder in XMA mode: %s\n", vpx_codec_error(&decoder));
-        return EXIT_FAILURE;
-    }
-
-    /* Iterate through the list of memory maps, allocating them with the
-     * requested alignment.
-     */
-    iter = NULL;
-
-    do
-    {
-        vpx_codec_mmap_t  mmap;
-        unsigned int    align;
-
-        res = vpx_codec_get_mem_map(&decoder, &mmap, &iter);
-        align = mmap.align ? mmap.align - 1 : 0;
-
-        if (!res)
-        {
-            if (verbose)
-                printf("Allocating segment %u, size %lu, align %u %s\n",
-                       mmap.id, mmap.sz, mmap.align,
-                       mmap.flags & VPX_CODEC_MEM_ZERO ? "(ZEROED)" : "");
-
-            if (mmap.flags & VPX_CODEC_MEM_ZERO)
-                mmap.priv = calloc(1, mmap.sz + align);
-            else
-                mmap.priv = malloc(mmap.sz + align);
-
-            mmap.base = (void *)((((uintptr_t)mmap.priv) + align) & ~(uintptr_t)align);
-            mmap.dtor = my_mem_dtor;
-            alloc_sz += mmap.sz + align;
-
-            if (vpx_codec_set_mem_map(&decoder, &mmap, 1))
-            {
-                printf("Failed to set mmap: %s\n", vpx_codec_error(&decoder));
-                return EXIT_FAILURE;
-            }
-        }
-        else if (res != VPX_CODEC_LIST_END)
-        {
-            printf("Failed to get mmap: %s\n", vpx_codec_error(&decoder));
-            return EXIT_FAILURE;
-        }
-    }
-    while (res != VPX_CODEC_LIST_END);
-
-    printf("%s\n    %d bytes external memory required for %dx%d.\n",
-           decoder.name, alloc_sz, cfg.w, cfg.h);
-    vpx_codec_destroy(&decoder);
-    return EXIT_SUCCESS;
+  printf("%s\n    %d bytes external memory required for %dx%d.\n",
+         decoder.name, alloc_sz, cfg.w, cfg.h);
+  vpx_codec_destroy(&decoder);
+  return EXIT_SUCCESS;
 
 }