1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libvpx/vpx/src/vpx_codec.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,184 @@
1.4 +/*
1.5 + * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license
1.8 + * that can be found in the LICENSE file in the root of the source
1.9 + * tree. An additional intellectual property rights grant can be found
1.10 + * in the file PATENTS. All contributing project authors may
1.11 + * be found in the AUTHORS file in the root of the source tree.
1.12 + */
1.13 +
1.14 +
1.15 +/*!\file
1.16 + * \brief Provides the high level interface to wrap decoder algorithms.
1.17 + *
1.18 + */
1.19 +#include <stdarg.h>
1.20 +#include <stdlib.h>
1.21 +#include "vpx/vpx_integer.h"
1.22 +#include "vpx/internal/vpx_codec_internal.h"
1.23 +#include "vpx_version.h"
1.24 +
1.25 +#define SAVE_STATUS(ctx,var) (ctx?(ctx->err = var):var)
1.26 +
1.27 +int vpx_codec_version(void) {
1.28 + return VERSION_PACKED;
1.29 +}
1.30 +
1.31 +
1.32 +const char *vpx_codec_version_str(void) {
1.33 + return VERSION_STRING_NOSP;
1.34 +}
1.35 +
1.36 +
1.37 +const char *vpx_codec_version_extra_str(void) {
1.38 + return VERSION_EXTRA;
1.39 +}
1.40 +
1.41 +
1.42 +const char *vpx_codec_iface_name(vpx_codec_iface_t *iface) {
1.43 + return iface ? iface->name : "<invalid interface>";
1.44 +}
1.45 +
1.46 +const char *vpx_codec_err_to_string(vpx_codec_err_t err) {
1.47 + switch (err) {
1.48 + case VPX_CODEC_OK:
1.49 + return "Success";
1.50 + case VPX_CODEC_ERROR:
1.51 + return "Unspecified internal error";
1.52 + case VPX_CODEC_MEM_ERROR:
1.53 + return "Memory allocation error";
1.54 + case VPX_CODEC_ABI_MISMATCH:
1.55 + return "ABI version mismatch";
1.56 + case VPX_CODEC_INCAPABLE:
1.57 + return "Codec does not implement requested capability";
1.58 + case VPX_CODEC_UNSUP_BITSTREAM:
1.59 + return "Bitstream not supported by this decoder";
1.60 + case VPX_CODEC_UNSUP_FEATURE:
1.61 + return "Bitstream required feature not supported by this decoder";
1.62 + case VPX_CODEC_CORRUPT_FRAME:
1.63 + return "Corrupt frame detected";
1.64 + case VPX_CODEC_INVALID_PARAM:
1.65 + return "Invalid parameter";
1.66 + case VPX_CODEC_LIST_END:
1.67 + return "End of iterated list";
1.68 + }
1.69 +
1.70 + return "Unrecognized error code";
1.71 +}
1.72 +
1.73 +const char *vpx_codec_error(vpx_codec_ctx_t *ctx) {
1.74 + return (ctx) ? vpx_codec_err_to_string(ctx->err)
1.75 + : vpx_codec_err_to_string(VPX_CODEC_INVALID_PARAM);
1.76 +}
1.77 +
1.78 +const char *vpx_codec_error_detail(vpx_codec_ctx_t *ctx) {
1.79 + if (ctx && ctx->err)
1.80 + return ctx->priv ? ctx->priv->err_detail : ctx->err_detail;
1.81 +
1.82 + return NULL;
1.83 +}
1.84 +
1.85 +
1.86 +vpx_codec_err_t vpx_codec_destroy(vpx_codec_ctx_t *ctx) {
1.87 + vpx_codec_err_t res;
1.88 +
1.89 + if (!ctx)
1.90 + res = VPX_CODEC_INVALID_PARAM;
1.91 + else if (!ctx->iface || !ctx->priv)
1.92 + res = VPX_CODEC_ERROR;
1.93 + else {
1.94 + if (ctx->priv->alg_priv)
1.95 + ctx->iface->destroy(ctx->priv->alg_priv);
1.96 +
1.97 + ctx->iface = NULL;
1.98 + ctx->name = NULL;
1.99 + ctx->priv = NULL;
1.100 + res = VPX_CODEC_OK;
1.101 + }
1.102 +
1.103 + return SAVE_STATUS(ctx, res);
1.104 +}
1.105 +
1.106 +
1.107 +vpx_codec_caps_t vpx_codec_get_caps(vpx_codec_iface_t *iface) {
1.108 + return (iface) ? iface->caps : 0;
1.109 +}
1.110 +
1.111 +
1.112 +vpx_codec_err_t vpx_codec_control_(vpx_codec_ctx_t *ctx,
1.113 + int ctrl_id,
1.114 + ...) {
1.115 + vpx_codec_err_t res;
1.116 +
1.117 + if (!ctx || !ctrl_id)
1.118 + res = VPX_CODEC_INVALID_PARAM;
1.119 + else if (!ctx->iface || !ctx->priv || !ctx->iface->ctrl_maps)
1.120 + res = VPX_CODEC_ERROR;
1.121 + else {
1.122 + vpx_codec_ctrl_fn_map_t *entry;
1.123 +
1.124 + res = VPX_CODEC_ERROR;
1.125 +
1.126 + for (entry = ctx->iface->ctrl_maps; entry && entry->fn; entry++) {
1.127 + if (!entry->ctrl_id || entry->ctrl_id == ctrl_id) {
1.128 + va_list ap;
1.129 +
1.130 + va_start(ap, ctrl_id);
1.131 + res = entry->fn(ctx->priv->alg_priv, ctrl_id, ap);
1.132 + va_end(ap);
1.133 + break;
1.134 + }
1.135 + }
1.136 + }
1.137 +
1.138 + return SAVE_STATUS(ctx, res);
1.139 +}
1.140 +
1.141 +//------------------------------------------------------------------------------
1.142 +// mmap interface
1.143 +
1.144 +vpx_codec_err_t vpx_mmap_alloc(vpx_codec_mmap_t *mmap) {
1.145 + unsigned int align = mmap->align ? mmap->align - 1 : 0;
1.146 +
1.147 + if (mmap->flags & VPX_CODEC_MEM_ZERO)
1.148 + mmap->priv = calloc(1, mmap->sz + align);
1.149 + else
1.150 + mmap->priv = malloc(mmap->sz + align);
1.151 +
1.152 + if (mmap->priv == NULL) return VPX_CODEC_MEM_ERROR;
1.153 + mmap->base = (void *)((((uintptr_t)mmap->priv) + align) & ~(uintptr_t)align);
1.154 + mmap->dtor = vpx_mmap_dtor;
1.155 + return VPX_CODEC_OK;
1.156 +}
1.157 +
1.158 +void vpx_mmap_dtor(vpx_codec_mmap_t *mmap) {
1.159 + free(mmap->priv);
1.160 +}
1.161 +
1.162 +vpx_codec_err_t vpx_validate_mmaps(const vpx_codec_stream_info_t *si,
1.163 + const vpx_codec_mmap_t *mmaps,
1.164 + const mem_req_t *mem_reqs, int nreqs,
1.165 + vpx_codec_flags_t init_flags) {
1.166 + int i;
1.167 +
1.168 + for (i = 0; i < nreqs - 1; ++i) {
1.169 + /* Ensure the segment has been allocated */
1.170 + if (mmaps[i].base == NULL) {
1.171 + return VPX_CODEC_MEM_ERROR;
1.172 + }
1.173 +
1.174 + /* Verify variable size segment is big enough for the current si. */
1.175 + if (mem_reqs[i].calc_sz != NULL) {
1.176 + vpx_codec_dec_cfg_t cfg;
1.177 +
1.178 + cfg.w = si->w;
1.179 + cfg.h = si->h;
1.180 +
1.181 + if (mmaps[i].sz < mem_reqs[i].calc_sz(&cfg, init_flags)) {
1.182 + return VPX_CODEC_MEM_ERROR;
1.183 + }
1.184 + }
1.185 + }
1.186 + return VPX_CODEC_OK;
1.187 +}
