/* *  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. */ /*!\file * \brief Provides the high level interface to wrap decoder algorithms. * */#include <stdarg.h>#include <stdlib.h>#include "vpx_config.h"#include "vpx/vpx_integer.h"#include "vpx/internal/vpx_codec_internal.h"#include "vpx_version.h" #define SAVE_STATUS(ctx, var) (ctx ? (ctx->err = var) : var) int vpx_codec_version(void) { return VERSION_PACKED; } const char *vpx_codec_version_str(void) { return VERSION_STRING_NOSP; } const char *vpx_codec_version_extra_str(void) { return VERSION_EXTRA; } const char *vpx_codec_iface_name(vpx_codec_iface_t *iface) {  return iface ? iface->name : "<invalid interface>";} const char *vpx_codec_err_to_string(vpx_codec_err_t err) {  switch (err) {    case VPX_CODEC_OK: return "Success";    case VPX_CODEC_ERROR: return "Unspecified internal error";    case VPX_CODEC_MEM_ERROR: return "Memory allocation error";    case VPX_CODEC_ABI_MISMATCH: return "ABI version mismatch";    case VPX_CODEC_INCAPABLE:      return "Codec does not implement requested capability";    case VPX_CODEC_UNSUP_BITSTREAM:      return "Bitstream not supported by this decoder";    case VPX_CODEC_UNSUP_FEATURE:      return "Bitstream required feature not supported by this decoder";    case VPX_CODEC_CORRUPT_FRAME: return "Corrupt frame detected";    case VPX_CODEC_INVALID_PARAM: return "Invalid parameter";    case VPX_CODEC_LIST_END: return "End of iterated list";  }   return "Unrecognized error code";} const char *vpx_codec_error(vpx_codec_ctx_t *ctx) {  return (ctx) ? vpx_codec_err_to_string(ctx->err)               : vpx_codec_err_to_string(VPX_CODEC_INVALID_PARAM);} const char *vpx_codec_error_detail(vpx_codec_ctx_t *ctx) {  if (ctx && ctx->err)    return ctx->priv ? ctx->priv->err_detail : ctx->err_detail;   return NULL;} vpx_codec_err_t vpx_codec_destroy(vpx_codec_ctx_t *ctx) {  vpx_codec_err_t res;   if (!ctx)    res = VPX_CODEC_INVALID_PARAM;  else if (!ctx->iface || !ctx->priv)    res = VPX_CODEC_ERROR;  else {    ctx->iface->destroy((vpx_codec_alg_priv_t *)ctx->priv);     ctx->iface = NULL;    ctx->name = NULL;    ctx->priv = NULL;    res = VPX_CODEC_OK;  }   return SAVE_STATUS(ctx, res);} vpx_codec_caps_t vpx_codec_get_caps(vpx_codec_iface_t *iface) {  return (iface) ? iface->caps : 0;} vpx_codec_err_t vpx_codec_control_(vpx_codec_ctx_t *ctx, int ctrl_id, ...) {  vpx_codec_err_t res;   if (!ctx || !ctrl_id)    res = VPX_CODEC_INVALID_PARAM;  else if (!ctx->iface || !ctx->priv || !ctx->iface->ctrl_maps)    res = VPX_CODEC_ERROR;  else {    vpx_codec_ctrl_fn_map_t *entry;     res = VPX_CODEC_INCAPABLE;     for (entry = ctx->iface->ctrl_maps; entry->fn; entry++) {      if (!entry->ctrl_id || entry->ctrl_id == ctrl_id) {        va_list ap;         va_start(ap, ctrl_id);        res = entry->fn((vpx_codec_alg_priv_t *)ctx->priv, ap);        va_end(ap);        break;      }    }  }   return SAVE_STATUS(ctx, res);} void vpx_internal_error(struct vpx_internal_error_info *info,                        vpx_codec_err_t error, const char *fmt, ...) {  va_list ap;   info->error_code = error;  info->has_detail = 0;   if (fmt) {    size_t sz = sizeof(info->detail);     info->has_detail = 1;    va_start(ap, fmt);    vsnprintf(info->detail, sz - 1, fmt, ap);    va_end(ap);    info->detail[sz - 1] = '\0';  }   if (info->setjmp) longjmp(info->jmp, info->error_code);}