libvpx: Pull from upstream

source/libvpx/examples/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_VP9_DECODER
-#include "vpx/vp8dx.h"
-#endif
-
-static char *exec_name;
-static int   verbose = 0;
-
-static const struct {
-  const char *name;
-  vpx_codec_iface_t *iface;
-} ifaces[] = {
-#if CONFIG_VP9_DECODER
-  {"vp9",  &vpx_codec_vp8_dx_algo},
-#endif
-};
-
-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);
-
-  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);
-}
-
-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);
-
-  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;
-
-  exec_name = argv[0];
-
-  for (i = 1; i < argc; i++) {
-    if (!strcmp(argv[i], "--codec")) {
-      if (i + 1 < argc) {
-        int j, k = -1;
-
-        i++;
-
-        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();
-    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);
-
-  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;
-
-}