/* *  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);}