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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/cdm/ppapi/external_clear_key/libvpx_cdm_video_decoder.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "media/base/limits.h"
// Include libvpx header files.
// VPX_CODEC_DISABLE_COMPAT excludes parts of the libvpx API that provide
// backwards compatibility for legacy applications using the library.
#define VPX_CODEC_DISABLE_COMPAT 1
extern "C" {
// Note: vpx_decoder.h must be first or compile will fail.
#include "third_party/libvpx_new/source/libvpx/vpx/vp8dx.h"
#include "third_party/libvpx_new/source/libvpx/vpx/vpx_decoder.h" // NOLINT
}
// Enable USE_COPYPLANE_WITH_LIBVPX to use |CopyPlane()| instead of memcpy to
// copy video frame data.
// #define USE_COPYPLANE_WITH_LIBVPX 1
namespace media {
static const int kDecodeThreads = 2;
LibvpxCdmVideoDecoder::LibvpxCdmVideoDecoder(CdmHost* host)
: is_initialized_(false),
host_(host),
vpx_codec_(NULL),
vpx_image_(NULL) {
}
LibvpxCdmVideoDecoder::~LibvpxCdmVideoDecoder() {
Deinitialize();
}
bool LibvpxCdmVideoDecoder::Initialize(const cdm::VideoDecoderConfig& config) {
DVLOG(1) << "Initialize()";
if (!IsValidOutputConfig(config.format, config.coded_size)) {
LOG(ERROR) << "Initialize(): invalid video decoder configuration.";
return false;
}
if (is_initialized_) {
LOG(ERROR) << "Initialize(): Already initialized.";
return false;
}
vpx_codec_ = new vpx_codec_ctx();
vpx_codec_dec_cfg_t vpx_config = {0};
vpx_config.w = config.coded_size.width;
vpx_config.h = config.coded_size.height;
vpx_config.threads = kDecodeThreads;
vpx_codec_err_t status = vpx_codec_dec_init(vpx_codec_,
vpx_codec_vp8_dx(),
&vpx_config,
0);
if (status != VPX_CODEC_OK) {
LOG(ERROR) << "InitializeLibvpx(): vpx_codec_dec_init failed, ret="
<< status;
delete vpx_codec_;
vpx_codec_ = NULL;
}
is_initialized_ = true;
return true;
}
void LibvpxCdmVideoDecoder::Deinitialize() {
DVLOG(1) << "Deinitialize()";
if (vpx_codec_) {
vpx_codec_destroy(vpx_codec_);
vpx_codec_ = NULL;
}
is_initialized_ = false;
}
void LibvpxCdmVideoDecoder::Reset() {
DVLOG(1) << "Reset()";
}
// static
bool LibvpxCdmVideoDecoder::IsValidOutputConfig(cdm::VideoFormat format,
const cdm::Size& data_size) {
return ((format == cdm::kYv12 || format == cdm::kI420) &&
(data_size.width % 2) == 0 && (data_size.height % 2) == 0 &&
data_size.width > 0 && data_size.height > 0 &&
data_size.width <= limits::kMaxDimension &&
data_size.height <= limits::kMaxDimension &&
data_size.width * data_size.height <= limits::kMaxCanvas);
}
cdm::Status LibvpxCdmVideoDecoder::DecodeFrame(
const uint8_t* compressed_frame,
int32_t compressed_frame_size,
int64_t timestamp,
cdm::VideoFrame* decoded_frame) {
DVLOG(1) << "DecodeFrame()";
DCHECK(decoded_frame);
// Pass |compressed_frame| to libvpx.
void* user_priv = reinterpret_cast<void*>(×tamp);
vpx_codec_err_t status = vpx_codec_decode(vpx_codec_,
compressed_frame,
compressed_frame_size,
user_priv,
0);
if (status != VPX_CODEC_OK) {
LOG(ERROR) << "DecodeFrameLibvpx(): vpx_codec_decode failed, status="
<< status;
return cdm::kDecodeError;
}
// Gets pointer to decoded data.
vpx_codec_iter_t iter = NULL;
vpx_image_ = vpx_codec_get_frame(vpx_codec_, &iter);
if (!vpx_image_)
return cdm::kNeedMoreData;
if (vpx_image_->user_priv != reinterpret_cast<void*>(×tamp)) {
LOG(ERROR) << "DecodeFrameLibvpx() invalid output timestamp.";
return cdm::kDecodeError;
}
decoded_frame->SetTimestamp(timestamp);
if (!CopyVpxImageTo(decoded_frame)) {
LOG(ERROR) << "DecodeFrameLibvpx() could not copy vpx image to output "
<< "buffer.";
return cdm::kDecodeError;
}
return cdm::kSuccess;
}
bool LibvpxCdmVideoDecoder::CopyVpxImageTo(cdm::VideoFrame* cdm_video_frame) {
DCHECK(cdm_video_frame);
DCHECK_EQ(vpx_image_->fmt, VPX_IMG_FMT_I420);
DCHECK_EQ(vpx_image_->d_w % 2, 0U);
DCHECK_EQ(vpx_image_->d_h % 2, 0U);
const int y_size = vpx_image_->stride[VPX_PLANE_Y] * vpx_image_->d_h;
const int uv_rows = vpx_image_->d_h / 2;
const int u_size = vpx_image_->stride[VPX_PLANE_U] * uv_rows;
const int v_size = vpx_image_->stride[VPX_PLANE_V] * uv_rows;
const int space_required = y_size + u_size + v_size;
DCHECK(!cdm_video_frame->FrameBuffer());
cdm_video_frame->SetFrameBuffer(host_->Allocate(space_required));
if (!cdm_video_frame->FrameBuffer()) {
LOG(ERROR) << "CopyVpxImageTo() CdmHost::Allocate failed.";
return false;
}
cdm_video_frame->FrameBuffer()->SetSize(space_required);
memcpy(cdm_video_frame->FrameBuffer()->Data(),
vpx_image_->planes[VPX_PLANE_Y],
y_size);
memcpy(cdm_video_frame->FrameBuffer()->Data() + y_size,
vpx_image_->planes[VPX_PLANE_U],
u_size);
memcpy(cdm_video_frame->FrameBuffer()->Data() + y_size + u_size,
vpx_image_->planes[VPX_PLANE_V],
v_size);
cdm_video_frame->SetFormat(cdm::kYv12);
cdm::Size video_frame_size;
video_frame_size.width = vpx_image_->d_w;
video_frame_size.height = vpx_image_->d_h;
cdm_video_frame->SetSize(video_frame_size);
cdm_video_frame->SetPlaneOffset(cdm::VideoFrame::kYPlane, 0);
cdm_video_frame->SetPlaneOffset(cdm::VideoFrame::kUPlane, y_size);
cdm_video_frame->SetPlaneOffset(cdm::VideoFrame::kVPlane,
y_size + u_size);
cdm_video_frame->SetStride(cdm::VideoFrame::kYPlane,
vpx_image_->stride[VPX_PLANE_Y]);
cdm_video_frame->SetStride(cdm::VideoFrame::kUPlane,
vpx_image_->stride[VPX_PLANE_U]);
cdm_video_frame->SetStride(cdm::VideoFrame::kVPlane,
vpx_image_->stride[VPX_PLANE_V]);
return true;
}
} // namespace media
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