ref: 472e14e725acec83e1ed4f945b64e2f14dcaacaa
dir: /vpx/src/vpx_decoder.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.
*/
/*!\file
* \brief Provides the high level interface to wrap decoder algorithms.
*
*/
#include <string.h>
#include "vpx/internal/vpx_codec_internal.h"
#define SAVE_STATUS(ctx,var) (ctx?(ctx->err = var):var)
static vpx_codec_alg_priv_t *get_alg_priv(vpx_codec_ctx_t *ctx) {
return (vpx_codec_alg_priv_t *)ctx->priv;
}
vpx_codec_err_t vpx_codec_dec_init_ver(vpx_codec_ctx_t *ctx,
vpx_codec_iface_t *iface,
const vpx_codec_dec_cfg_t *cfg,
vpx_codec_flags_t flags,
int ver) {
vpx_codec_err_t res;
if (ver != VPX_DECODER_ABI_VERSION)
res = VPX_CODEC_ABI_MISMATCH;
else if (!ctx || !iface)
res = VPX_CODEC_INVALID_PARAM;
else if (iface->abi_version != VPX_CODEC_INTERNAL_ABI_VERSION)
res = VPX_CODEC_ABI_MISMATCH;
else if ((flags & VPX_CODEC_USE_POSTPROC) && !(iface->caps & VPX_CODEC_CAP_POSTPROC))
res = VPX_CODEC_INCAPABLE;
else if ((flags & VPX_CODEC_USE_ERROR_CONCEALMENT) &&
!(iface->caps & VPX_CODEC_CAP_ERROR_CONCEALMENT))
res = VPX_CODEC_INCAPABLE;
else if ((flags & VPX_CODEC_USE_INPUT_FRAGMENTS) &&
!(iface->caps & VPX_CODEC_CAP_INPUT_FRAGMENTS))
res = VPX_CODEC_INCAPABLE;
else if (!(iface->caps & VPX_CODEC_CAP_DECODER))
res = VPX_CODEC_INCAPABLE;
else {
memset(ctx, 0, sizeof(*ctx));
ctx->iface = iface;
ctx->name = iface->name;
ctx->priv = NULL;
ctx->init_flags = flags;
ctx->config.dec = cfg;
res = ctx->iface->init(ctx, NULL);
if (res) {
ctx->err_detail = ctx->priv ? ctx->priv->err_detail : NULL;
vpx_codec_destroy(ctx);
}
}
return SAVE_STATUS(ctx, res);
}
vpx_codec_err_t vpx_codec_peek_stream_info(vpx_codec_iface_t *iface,
const uint8_t *data,
unsigned int data_sz,
vpx_codec_stream_info_t *si) {
vpx_codec_err_t res;
if (!iface || !data || !data_sz || !si
|| si->sz < sizeof(vpx_codec_stream_info_t))
res = VPX_CODEC_INVALID_PARAM;
else {
/* Set default/unknown values */
si->w = 0;
si->h = 0;
res = iface->dec.peek_si(data, data_sz, si);
}
return res;
}
vpx_codec_err_t vpx_codec_get_stream_info(vpx_codec_ctx_t *ctx,
vpx_codec_stream_info_t *si) {
vpx_codec_err_t res;
if (!ctx || !si || si->sz < sizeof(vpx_codec_stream_info_t))
res = VPX_CODEC_INVALID_PARAM;
else if (!ctx->iface || !ctx->priv)
res = VPX_CODEC_ERROR;
else {
/* Set default/unknown values */
si->w = 0;
si->h = 0;
res = ctx->iface->dec.get_si(get_alg_priv(ctx), si);
}
return SAVE_STATUS(ctx, res);
}
vpx_codec_err_t vpx_codec_decode(vpx_codec_ctx_t *ctx,
const uint8_t *data,
unsigned int data_sz,
void *user_priv,
long deadline) {
vpx_codec_err_t res;
/* Sanity checks */
/* NULL data ptr allowed if data_sz is 0 too */
if (!ctx || (!data && data_sz) || (data && !data_sz))
res = VPX_CODEC_INVALID_PARAM;
else if (!ctx->iface || !ctx->priv)
res = VPX_CODEC_ERROR;
else {
res = ctx->iface->dec.decode(get_alg_priv(ctx), data, data_sz, user_priv,
deadline);
}
return SAVE_STATUS(ctx, res);
}
vpx_image_t *vpx_codec_get_frame(vpx_codec_ctx_t *ctx,
vpx_codec_iter_t *iter) {
vpx_image_t *img;
if (!ctx || !iter || !ctx->iface || !ctx->priv)
img = NULL;
else
img = ctx->iface->dec.get_frame(get_alg_priv(ctx), iter);
return img;
}
vpx_codec_err_t vpx_codec_register_put_frame_cb(vpx_codec_ctx_t *ctx,
vpx_codec_put_frame_cb_fn_t cb,
void *user_priv) {
vpx_codec_err_t res;
if (!ctx || !cb)
res = VPX_CODEC_INVALID_PARAM;
else if (!ctx->iface || !ctx->priv
|| !(ctx->iface->caps & VPX_CODEC_CAP_PUT_FRAME))
res = VPX_CODEC_ERROR;
else {
ctx->priv->dec.put_frame_cb.u.put_frame = cb;
ctx->priv->dec.put_frame_cb.user_priv = user_priv;
res = VPX_CODEC_OK;
}
return SAVE_STATUS(ctx, res);
}
vpx_codec_err_t vpx_codec_register_put_slice_cb(vpx_codec_ctx_t *ctx,
vpx_codec_put_slice_cb_fn_t cb,
void *user_priv) {
vpx_codec_err_t res;
if (!ctx || !cb)
res = VPX_CODEC_INVALID_PARAM;
else if (!ctx->iface || !ctx->priv
|| !(ctx->iface->caps & VPX_CODEC_CAP_PUT_SLICE))
res = VPX_CODEC_ERROR;
else {
ctx->priv->dec.put_slice_cb.u.put_slice = cb;
ctx->priv->dec.put_slice_cb.user_priv = user_priv;
res = VPX_CODEC_OK;
}
return SAVE_STATUS(ctx, res);
}
vpx_codec_err_t vpx_codec_set_frame_buffer_functions(
vpx_codec_ctx_t *ctx, vpx_get_frame_buffer_cb_fn_t cb_get,
vpx_release_frame_buffer_cb_fn_t cb_release, void *cb_priv) {
vpx_codec_err_t res;
if (!ctx || !cb_get || !cb_release) {
res = VPX_CODEC_INVALID_PARAM;
} else if (!ctx->iface || !ctx->priv ||
!(ctx->iface->caps & VPX_CODEC_CAP_EXTERNAL_FRAME_BUFFER)) {
res = VPX_CODEC_ERROR;
} else {
res = ctx->iface->dec.set_fb_fn(get_alg_priv(ctx), cb_get, cb_release,
cb_priv);
}
return SAVE_STATUS(ctx, res);
}