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// Copyright (c) 2012 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/video/capture/win/sink_input_pin_win.h"
#include <cstring>
// Avoid including strsafe.h via dshow as it will cause build warnings.
#define NO_DSHOW_STRSAFE
#include <dshow.h>
#include "base/logging.h"
namespace media {
const REFERENCE_TIME kSecondsToReferenceTime = 10000000;
static DWORD GetArea(const BITMAPINFOHEADER& info_header) {
return info_header.biWidth * info_header.biHeight;
}
SinkInputPin::SinkInputPin(IBaseFilter* filter,
SinkFilterObserver* observer)
: requested_frame_rate_(0),
observer_(observer),
PinBase(filter) {
}
void SinkInputPin::SetRequestedMediaFormat(
VideoPixelFormat pixel_format,
float frame_rate,
const BITMAPINFOHEADER& info_header) {
requested_pixel_format_ = pixel_format;
requested_frame_rate_ = frame_rate;
requested_info_header_ = info_header;
resulting_format_.frame_size.SetSize(0, 0);
resulting_format_.frame_rate = 0;
resulting_format_.pixel_format = PIXEL_FORMAT_UNKNOWN;
}
const VideoCaptureFormat& SinkInputPin::ResultingFormat() {
return resulting_format_;
}
bool SinkInputPin::IsMediaTypeValid(const AM_MEDIA_TYPE* media_type) {
GUID type = media_type->majortype;
if (type != MEDIATYPE_Video)
return false;
GUID format_type = media_type->formattype;
if (format_type != FORMAT_VideoInfo)
return false;
// Check for the sub types we support.
GUID sub_type = media_type->subtype;
VIDEOINFOHEADER* pvi =
reinterpret_cast<VIDEOINFOHEADER*>(media_type->pbFormat);
if (pvi == NULL)
return false;
// Store the incoming width and height.
resulting_format_.frame_size.SetSize(pvi->bmiHeader.biWidth,
abs(pvi->bmiHeader.biHeight));
if (pvi->AvgTimePerFrame > 0) {
resulting_format_.frame_rate =
static_cast<int>(kSecondsToReferenceTime / pvi->AvgTimePerFrame);
} else {
resulting_format_.frame_rate = requested_frame_rate_;
}
if (sub_type == kMediaSubTypeI420 &&
pvi->bmiHeader.biCompression == MAKEFOURCC('I', '4', '2', '0')) {
resulting_format_.pixel_format = PIXEL_FORMAT_I420;
return true;
}
if (sub_type == MEDIASUBTYPE_YUY2 &&
pvi->bmiHeader.biCompression == MAKEFOURCC('Y', 'U', 'Y', '2')) {
resulting_format_.pixel_format = PIXEL_FORMAT_YUY2;
return true;
}
if (sub_type == MEDIASUBTYPE_MJPG &&
pvi->bmiHeader.biCompression == MAKEFOURCC('M', 'J', 'P', 'G')) {
resulting_format_.pixel_format = PIXEL_FORMAT_MJPEG;
return true;
}
if (sub_type == MEDIASUBTYPE_RGB24 &&
pvi->bmiHeader.biCompression == BI_RGB) {
resulting_format_.pixel_format = PIXEL_FORMAT_RGB24;
return true;
}
if (sub_type == MEDIASUBTYPE_RGB32 &&
pvi->bmiHeader.biCompression == BI_RGB) {
resulting_format_.pixel_format = PIXEL_FORMAT_RGB32;
return true;
}
return false;
}
bool SinkInputPin::GetValidMediaType(int index, AM_MEDIA_TYPE* media_type) {
if (media_type->cbFormat < sizeof(VIDEOINFOHEADER))
return false;
VIDEOINFOHEADER* pvi =
reinterpret_cast<VIDEOINFOHEADER*>(media_type->pbFormat);
ZeroMemory(pvi, sizeof(VIDEOINFOHEADER));
pvi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
pvi->bmiHeader.biPlanes = 1;
pvi->bmiHeader.biClrImportant = 0;
pvi->bmiHeader.biClrUsed = 0;
if (requested_frame_rate_ > 0) {
pvi->AvgTimePerFrame =
kSecondsToReferenceTime / requested_frame_rate_;
}
media_type->majortype = MEDIATYPE_Video;
media_type->formattype = FORMAT_VideoInfo;
media_type->bTemporalCompression = FALSE;
if (requested_pixel_format_ == PIXEL_FORMAT_MJPEG) {
// If the requested pixel format is MJPEG, accept only MJPEG.
// This is ok since the capabilities of the capturer have been
// enumerated and we know that it is supported.
if (index != 0)
return false;
pvi->bmiHeader = requested_info_header_;
return true;
}
switch (index) {
case 0: {
pvi->bmiHeader.biCompression = MAKEFOURCC('I', '4', '2', '0');
pvi->bmiHeader.biBitCount = 12; // bit per pixel
pvi->bmiHeader.biWidth = requested_info_header_.biWidth;
pvi->bmiHeader.biHeight = requested_info_header_.biHeight;
pvi->bmiHeader.biSizeImage = GetArea(requested_info_header_) * 3 / 2;
media_type->subtype = kMediaSubTypeI420;
break;
}
case 1: {
pvi->bmiHeader.biCompression = MAKEFOURCC('Y', 'U', 'Y', '2');
pvi->bmiHeader.biBitCount = 16;
pvi->bmiHeader.biWidth = requested_info_header_.biWidth;
pvi->bmiHeader.biHeight = requested_info_header_.biHeight;
pvi->bmiHeader.biSizeImage = GetArea(requested_info_header_) * 2;
media_type->subtype = MEDIASUBTYPE_YUY2;
break;
}
case 2: {
pvi->bmiHeader.biCompression = BI_RGB;
pvi->bmiHeader.biBitCount = 24;
pvi->bmiHeader.biWidth = requested_info_header_.biWidth;
pvi->bmiHeader.biHeight = requested_info_header_.biHeight;
pvi->bmiHeader.biSizeImage = GetArea(requested_info_header_) * 3;
media_type->subtype = MEDIASUBTYPE_RGB24;
break;
}
case 3: {
pvi->bmiHeader.biCompression = BI_RGB;
pvi->bmiHeader.biBitCount = 32;
pvi->bmiHeader.biWidth = requested_info_header_.biWidth;
pvi->bmiHeader.biHeight = requested_info_header_.biHeight;
pvi->bmiHeader.biSizeImage = GetArea(requested_info_header_) * 4;
media_type->subtype = MEDIASUBTYPE_RGB32;
break;
}
default:
return false;
}
media_type->bFixedSizeSamples = TRUE;
media_type->lSampleSize = pvi->bmiHeader.biSizeImage;
return true;
}
HRESULT SinkInputPin::Receive(IMediaSample* sample) {
const int length = sample->GetActualDataLength();
uint8* buffer = NULL;
if (length <= 0) {
DLOG(WARNING) << "Media sample length is 0 or less.";
return S_FALSE;
}
if (FAILED(sample->GetPointer(&buffer)))
return S_FALSE;
observer_->FrameReceived(buffer, length);
return S_OK;
}
SinkInputPin::~SinkInputPin() {}
} // namespace media
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