internal static vpx_codec_err_t vp8_init(vpx_codec_ctx_t ctx,
vpx_codec_priv_enc_mr_cfg_t data)
{
vpx_codec_err_t res = vpx_codec_err_t.VPX_CODEC_OK;
//(void)data;
//vp8_rtcd();
//vpx_dsp_rtcd();
//vpx_scale_rtcd();
/* This function only allocates space for the vpx_codec_alg_priv_t
* structure. More memory may be required at the time the stream
* information becomes known.
*/
if (ctx.priv == null)
{
if (vp8_init_ctx(ctx) != 0)
{
return(vpx_codec_err_t.VPX_CODEC_MEM_ERROR);
}
/* initialize number of fragments to zero */
ctx.priv.fragments.count = 0;
/* is input fragments enabled? */
ctx.priv.fragments.enabled = (int)([email protected]_flags & vpx_decoder.VPX_CODEC_USE_INPUT_FRAGMENTS);
/*post processing level initialized to do nothing */
}
return(res);
}
/// <summary>
/// Initialize a decoder instance.
///
/// Initializes a decoder context using the given interface. Applications
/// should call the vpx_codec_dec_init convenience macro instead of this
/// function directly, to ensure that the ABI version number parameter
/// is properly initialized.
///
/// If the library was configured with --disable-multithread, this call
/// is not thread safe and should be guarded with a lock if being used
/// in a multithreaded context.
/// </summary>
/// <param name="ctx">Pointer to this instance's context.</param>
/// <param name="iface">Pointer to the algorithm interface to use.</param>
/// <param name="cfg">Configuration to use, if known. May be NULL.</param>
/// <param name="flags">Bitfield of VPX_CODEC_USE_* flags.</param>
/// <param name="ver">ABI version number. Must be set to VPX_DECODER_ABI_VERSION.</param>
/// <returns>
/// VPX_CODEC_OK The decoder algorithm initialized.
/// VPX_CODEC_MEM_ERROR Memory allocation failed.
/// </returns>
public static 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_DECODER_ABI_VERSION)
{
vpx_codec_err_t res;
if (ver != VPX_DECODER_ABI_VERSION)
{
res = vpx_codec_err_t.VPX_CODEC_ABI_MISMATCH;
}
else if (ctx == null || iface == null)
{
res = vpx_codec_err_t.VPX_CODEC_INVALID_PARAM;
}
else if (iface.abi_version != vpx_codec_internal.VPX_CODEC_INTERNAL_ABI_VERSION)
{
res = vpx_codec_err_t.VPX_CODEC_ABI_MISMATCH;
}
else if (((flags & VPX_CODEC_USE_POSTPROC) > 0) &&
((iface.caps & VPX_CODEC_CAP_POSTPROC) == 0))
{
res = vpx_codec_err_t.VPX_CODEC_INCAPABLE;
}
else if (((flags & VPX_CODEC_USE_ERROR_CONCEALMENT) > 0) &&
((iface.caps & VPX_CODEC_CAP_ERROR_CONCEALMENT) == 0))
{
res = vpx_codec_err_t.VPX_CODEC_INCAPABLE;
}
else if (((flags & VPX_CODEC_USE_INPUT_FRAGMENTS) > 0) &&
((iface.caps & VPX_CODEC_CAP_INPUT_FRAGMENTS) == 0))
{
res = vpx_codec_err_t.VPX_CODEC_INCAPABLE;
}
else if ((iface.caps & vpx_codec.VPX_CODEC_CAP_DECODER) == 0)
{
res = vpx_codec_err_t.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;
ctx.dec_cfg = cfg;
res = ctx.iface.init(ctx, null);
if (res != vpx_codec_err_t.VPX_CODEC_OK)
{
//ctx.err_detail = ctx.priv != null ? ctx.priv.err_detail : null;
vpx_codec.vpx_codec_destroy(ctx);
}
}
//return SAVE_STATUS(ctx, res);
return(ctx != null ? (ctx.err = res) : res);
}
/// <summary>
/// Convenience macro for vpx_codec_dec_init_ver()
///
/// Ensures the ABI version parameter is properly set.
/// </summary>
public static vpx_codec_err_t vpx_codec_dec_init(vpx_codec_ctx_t ctx,
vpx_codec_iface_t iface,
vpx_codec_dec_cfg_t cfg,
vpx_codec_flags_t flags)
{
return(vpx_codec_dec_init_ver(ctx, iface, cfg, flags));
}
/* REQUIRED FUNCTIONS
*
* The following functions are required to be implemented for all codecs.
* They represent the base case functionality expected of all codecs.
*/
/*!\brief Destroy a codec instance
*
* Destroys a codec context, freeing any associated memory buffers.
*
* \param[in] ctx Pointer to this instance's context
*
* \retval #VPX_CODEC_OK
* The codec algorithm initialized.
* \retval #VPX_CODEC_MEM_ERROR
* Memory allocation failed.
*/
// vpx_codec_err_t vpx_codec_destroy(vpx_codec_ctx_t *ctx);
public static vpx_codec_err_t vpx_codec_destroy(vpx_codec_ctx_t ctx)
{
vpx_codec_err_t res;
if (ctx == null)
{
res = vpx_codec_err_t.VPX_CODEC_INVALID_PARAM;
}
else if (ctx.iface == null || ctx.priv == null)
{
res = vpx_codec_err_t.VPX_CODEC_ERROR;
}
else
{
//ctx.iface.destroy((vpx_codec_alg_priv_t)ctx.priv);
ctx.iface = null;
ctx.name = null;
ctx.priv = null;
res = vpx_codec_err_t.VPX_CODEC_OK;
}
// return SAVE_STATUS(ctx, res);
return(ctx != null ? (ctx.err = res) : res);
}
/*!\brief Retrieve detailed error information for codec context
*
* Returns a human readable string providing detailed information about
* the last error.
*
* \param[in] ctx Pointer to this instance's context.
*
* \retval NULL
* No detailed information is available.
*/
// const char *vpx_codec_error_detail(vpx_codec_ctx_t *ctx);
public static string vpx_codec_error_detail(vpx_codec_ctx_t ctx)
{
if (ctx != null)
{
//return ctx.priv != null ? ctx.priv.err_detail : ctx.err_detail;
return(ctx.err_detail);
}
return(null);
}
public static vpx_image_t vpx_codec_get_frame(vpx_codec_ctx_t ctx, vpx_codec_iter_t iter)
{
vpx_image_t img;
if (ctx == null || iter == null || ctx.iface == null || ctx.priv == null)
{
img = null;
}
else
{
img = ctx.iface.dec.get_frame(get_alg_priv(ctx), iter);
}
return(img);
}
private static int vp8_init_ctx(vpx_codec_ctx_t ctx)
{
//vpx_codec_alg_priv_t priv = (vpx_codec_alg_priv_t)vpx_calloc(1, sizeof(*priv));
//if (!priv) return 1;
vpx_codec_alg_priv_t priv = new vpx_codec_alg_priv_t();
//ctx.priv = new vpx_codec_priv_t();
ctx.priv = new vpx_codec_alg_priv_t();
//ctx.priv.init_flags = ctx.init_flags;
//priv.si.sz = sizeof(priv->si);
//priv.decrypt_cb = null;
//priv.decrypt_state = IntPtr.Zero;
//if (ctx.dec_cfg != null) {
/* Update the reference to the config structure to an internal copy. */
//priv.cfg = *ctx->config.dec;
ctx.dec_cfg = priv.cfg; //&priv->cfg;
//}
return(0);
}
//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);
//}
public unsafe static vpx_codec_err_t vpx_codec_decode(vpx_codec_ctx_t ctx, byte *data,
uint data_sz, IntPtr user_priv, long deadline)
{
vpx_codec_err_t res;
/* Sanity checks */
/* NULL data ptr allowed if data_sz is 0 too */
if (ctx == null || data == null || data_sz == 0)
{
res = vpx_codec_err_t.VPX_CODEC_INVALID_PARAM;
}
else if (ctx.iface == null || ctx.priv == null)
{
res = vpx_codec_err_t.VPX_CODEC_ERROR;
}
else
{
res = ctx.iface.dec.decode(get_alg_priv(ctx), data, data_sz, user_priv,
deadline);
}
return(ctx != null ? (ctx.err = res) : res);
}
public static vpx_codec_alg_priv_t get_alg_priv(vpx_codec_ctx_t ctx)
{
return(ctx.priv);
}
public unsafe IEnumerable <VideoSample> DecodeVideo(byte[] frame, VideoPixelFormatsEnum pixelFormat, VideoCodecsEnum codec)
{
lock (_decoderLock)
{
if (_vp8Decoder == null)
{
_vp8Decoder = new vpx_codec_ctx_t();
vpx_codec_iface_t algo = vp8_dx.vpx_codec_vp8_dx();
vpx_codec_dec_cfg_t cfg = new vpx_codec_dec_cfg_t {
threads = 1
};
vpx_codec_err_t res = vpx_decoder.vpx_codec_dec_init(_vp8Decoder, algo, cfg, 0);
}
//logger.LogDebug($"Attempting to decode {frame.Length} bytes.");
//Console.WriteLine(frame.HexStr());
fixed(byte *pFrame = frame)
{
var result = vpx_decoder.vpx_codec_decode(_vp8Decoder, pFrame, (uint)frame.Length, IntPtr.Zero, 0);
//logger.LogDebug($"VP8 decode result {result}.");
if (result != vpx_codec_err_t.VPX_CODEC_OK)
{
logger.LogWarning($"VP8 decode of video sample failed with {result}.");
}
}
IntPtr iter = IntPtr.Zero;
var img = vpx_decoder.vpx_codec_get_frame(_vp8Decoder, iter);
if (img == null)
{
logger.LogWarning("Image could not be acquired from VP8 decoder stage.");
}
else
{
int dwidth = (int)img.d_w;
int dheight = (int)img.d_h;
int sz = dwidth * dheight;
var yPlane = img.planes[0];
var uPlane = img.planes[1];
var vPlane = img.planes[2];
byte[] decodedBuffer = new byte[dwidth * dheight * 3 / 2];
for (uint row = 0; row < dheight; row++)
{
Marshal.Copy((IntPtr)(yPlane + row * img.stride[0]), decodedBuffer, (int)(row * dwidth), (int)dwidth);
if (row < dheight / 2)
{
Marshal.Copy((IntPtr)(uPlane + row * img.stride[1]), decodedBuffer, (int)(sz + row * (dwidth / 2)), (int)dwidth / 2);
Marshal.Copy((IntPtr)(vPlane + row * img.stride[2]), decodedBuffer, (int)(sz + sz / 4 + row * (dwidth / 2)), (int)dwidth / 2);
}
}
byte[] rgb = PixelConverter.I420toBGR(decodedBuffer, dwidth, dheight, out _);
return(new List <VideoSample> {
new VideoSample {
Width = img.d_w, Height = img.d_h, Sample = rgb
}
});
}
return(new List <VideoSample>());
}
}
/*!\brief Retrieve error synopsis for codec context
*
* Returns a human readable string for the last error returned by the
* algorithm. The returned error will be one line and will not contain
* any newline characters.
*
*
* \param[in] ctx Pointer to this instance's context.
*
*/
// const char *vpx_codec_error(vpx_codec_ctx_t *ctx);
public static string vpx_codec_error(vpx_codec_ctx_t ctx)
{
return(ctx != null?vpx_codec_err_to_string(ctx.err)
: vpx_codec_err_to_string(vpx_codec_err_t.VPX_CODEC_INVALID_PARAM));
}
