ref: ef4a9670a85450a4ea4587634c20ca6c2fa2f8f9
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)
vpx_codec_err_t vpx_codec_dec_init_ver(vpx_codec_ctx_t *ctx,
vpx_codec_iface_t *iface,
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_XMA) && !(iface->caps & VPX_CODEC_CAP_XMA))
res = VPX_CODEC_INCAPABLE;
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 = VPX_CODEC_OK;
if (!(flags & VPX_CODEC_USE_XMA))
{
res = ctx->iface->init(ctx, NULL);
if (res)
{
ctx->err_detail = ctx->priv ? ctx->priv->err_detail : NULL;
vpx_codec_destroy(ctx);
}
if (ctx->priv)
ctx->priv->iface = ctx->iface;
}
}
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(ctx->priv->alg_priv, 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))
res = VPX_CODEC_INVALID_PARAM;
else if (!ctx->iface || !ctx->priv)
res = VPX_CODEC_ERROR;
else
{
res = ctx->iface->dec.decode(ctx->priv->alg_priv, 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(ctx->priv->alg_priv, 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_FRAME))
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_get_mem_map(vpx_codec_ctx_t *ctx,
vpx_codec_mmap_t *mmap,
vpx_codec_iter_t *iter)
{
vpx_codec_err_t res = VPX_CODEC_OK;
if (!ctx || !mmap || !iter || !ctx->iface)
res = VPX_CODEC_INVALID_PARAM;
else if (!(ctx->iface->caps & VPX_CODEC_CAP_XMA))
res = VPX_CODEC_ERROR;
else
res = ctx->iface->get_mmap(ctx, mmap, iter);
return SAVE_STATUS(ctx, res);
}
vpx_codec_err_t vpx_codec_set_mem_map(vpx_codec_ctx_t *ctx,
vpx_codec_mmap_t *mmap,
unsigned int num_maps)
{
vpx_codec_err_t res = VPX_CODEC_MEM_ERROR;
if (!ctx || !mmap || !ctx->iface)
res = VPX_CODEC_INVALID_PARAM;
else if (!(ctx->iface->caps & VPX_CODEC_CAP_XMA))
res = VPX_CODEC_ERROR;
else
{
unsigned int i;
for (i = 0; i < num_maps; i++, mmap++)
{
if (!mmap->base)
break;
/* Everything look ok, set the mmap in the decoder */
res = ctx->iface->set_mmap(ctx, mmap);
if (res)
break;
}
}
return SAVE_STATUS(ctx, res);
}