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/*
* 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/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 {
if (ctx->priv->alg_priv)
ctx->iface->destroy(ctx->priv->alg_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_ERROR;
for (entry = ctx->iface->ctrl_maps; entry && entry->fn; entry++) {
if (!entry->ctrl_id || entry->ctrl_id == ctrl_id) {
va_list ap;
va_start(ap, ctrl_id);
res = entry->fn(ctx->priv->alg_priv, ctrl_id, ap);
va_end(ap);
break;
}
}
}
return SAVE_STATUS(ctx, res);
}
//------------------------------------------------------------------------------
// mmap interface
vpx_codec_err_t vpx_mmap_alloc(vpx_codec_mmap_t *mmap) {
unsigned int align = mmap->align ? mmap->align - 1 : 0;
if (mmap->flags & VPX_CODEC_MEM_ZERO)
mmap->priv = calloc(1, mmap->sz + align);
else
mmap->priv = malloc(mmap->sz + align);
if (mmap->priv == NULL) return VPX_CODEC_MEM_ERROR;
mmap->base = (void *)((((uintptr_t)mmap->priv) + align) & ~(uintptr_t)align);
mmap->dtor = vpx_mmap_dtor;
return VPX_CODEC_OK;
}
void vpx_mmap_dtor(vpx_codec_mmap_t *mmap) {
free(mmap->priv);
}
vpx_codec_err_t vpx_validate_mmaps(const vpx_codec_stream_info_t *si,
const vpx_codec_mmap_t *mmaps,
const mem_req_t *mem_reqs, int nreqs,
vpx_codec_flags_t init_flags) {
int i;
for (i = 0; i < nreqs - 1; ++i) {
/* Ensure the segment has been allocated */
if (mmaps[i].base == NULL) {
return VPX_CODEC_MEM_ERROR;
}
/* Verify variable size segment is big enough for the current si. */
if (mem_reqs[i].calc_sz != NULL) {
vpx_codec_dec_cfg_t cfg;
cfg.w = si->w;
cfg.h = si->h;
if (mmaps[i].sz < mem_reqs[i].calc_sz(&cfg, init_flags)) {
return VPX_CODEC_MEM_ERROR;
}
}
}
return VPX_CODEC_OK;
}
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