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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/cast/video_receiver/codecs/vp8/vp8_decoder.h"
#include "base/logging.h"
#include "third_party/libvpx/source/libvpx/vpx/vp8dx.h"
namespace media {
namespace cast {
Vp8Decoder::Vp8Decoder(int number_of_cores) {
decoder_.reset(new vpx_dec_ctx_t());
InitDecode(number_of_cores);
}
Vp8Decoder::~Vp8Decoder() {}
void Vp8Decoder::InitDecode(int number_of_cores) {
vpx_codec_dec_cfg_t cfg;
cfg.threads = number_of_cores;
vpx_codec_flags_t flags = VPX_CODEC_USE_POSTPROC;
if (vpx_codec_dec_init(decoder_.get(), vpx_codec_vp8_dx(), &cfg, flags)) {
DCHECK(false) << "VP8 decode error";
}
}
bool Vp8Decoder::Decode(const EncodedVideoFrame& input_image,
I420VideoFrame* decoded_frame) {
VLOG(1) << "VP8 decode frame:" << static_cast<int>(input_image.frame_id)
<< " sized:" << input_image.data.size();
if (input_image.data.empty()) return false;
vpx_codec_iter_t iter = NULL;
vpx_image_t* img;
if (vpx_codec_decode(decoder_.get(),
input_image.data.data(),
static_cast<unsigned int>(input_image.data.size()),
0,
1 /* real time*/)) {
VLOG(1) << "Failed to decode VP8 frame.";
return false;
}
img = vpx_codec_get_frame(decoder_.get(), &iter);
if (img == NULL) {
VLOG(1) << "Skip rendering VP8 frame:"
<< static_cast<int>(input_image.frame_id);
return false;
}
// The img is only valid until the next call to vpx_codec_decode.
// Populate the decoded image.
decoded_frame->width = img->d_w;
decoded_frame->height = img->d_h;
decoded_frame->y_plane.stride = img->stride[VPX_PLANE_Y];
decoded_frame->y_plane.length = img->stride[VPX_PLANE_Y] * img->d_h;
decoded_frame->y_plane.data = new uint8[decoded_frame->y_plane.length];
memcpy(decoded_frame->y_plane.data, img->planes[VPX_PLANE_Y],
decoded_frame->y_plane.length);
decoded_frame->u_plane.stride = img->stride[VPX_PLANE_U];
decoded_frame->u_plane.length = img->stride[VPX_PLANE_U] * (img->d_h + 1) / 2;
decoded_frame->u_plane.data = new uint8[decoded_frame->u_plane.length];
memcpy(decoded_frame->u_plane.data, img->planes[VPX_PLANE_U],
decoded_frame->u_plane.length);
decoded_frame->v_plane.stride = img->stride[VPX_PLANE_V];
decoded_frame->v_plane.length = img->stride[VPX_PLANE_V] * (img->d_h + 1) / 2;
decoded_frame->v_plane.data = new uint8[decoded_frame->v_plane.length];
memcpy(decoded_frame->v_plane.data, img->planes[VPX_PLANE_V],
decoded_frame->v_plane.length);
return true;
}
} // namespace cast
} // namespace media
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