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/*
* Copyright (c) 2012 The WebRTC 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.
*/
#include "modules/video_capture/device_info_impl.h"
#include <stdlib.h>
#include <cstdint>
#include "absl/strings/match.h"
#include "absl/strings/string_view.h"
#include "api/video/video_rotation.h"
#include "common_video/libyuv/include/webrtc_libyuv.h"
#include "modules/video_capture/video_capture_defines.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
#include "rtc_base/synchronization/mutex.h"
#ifndef abs
#define abs(a) (a >= 0 ? a : -a)
#endif
namespace webrtc {
namespace videocapturemodule {
DeviceInfoImpl::DeviceInfoImpl()
: _lastUsedDeviceName(nullptr), _lastUsedDeviceNameLength(0) {}
DeviceInfoImpl::~DeviceInfoImpl(void) {
MutexLock lock(&_apiLock);
free(_lastUsedDeviceName);
}
int32_t DeviceInfoImpl::NumberOfCapabilities(const char* deviceUniqueIdUTF8) {
if (!deviceUniqueIdUTF8)
return -1;
MutexLock lock(&_apiLock);
// Is it the same device that is asked for again.
if (absl::EqualsIgnoreCase(
deviceUniqueIdUTF8,
absl::string_view(_lastUsedDeviceName, _lastUsedDeviceNameLength))) {
return static_cast<int32_t>(_captureCapabilities.size());
}
int32_t ret = CreateCapabilityMap(deviceUniqueIdUTF8);
return ret;
}
int32_t DeviceInfoImpl::GetCapability(const char* deviceUniqueIdUTF8,
const uint32_t deviceCapabilityNumber,
VideoCaptureCapability& capability) {
RTC_DCHECK(deviceUniqueIdUTF8);
MutexLock lock(&_apiLock);
if (!absl::EqualsIgnoreCase(
deviceUniqueIdUTF8,
absl::string_view(_lastUsedDeviceName, _lastUsedDeviceNameLength))) {
if (-1 == CreateCapabilityMap(deviceUniqueIdUTF8)) {
return -1;
}
}
// Make sure the number is valid
if (deviceCapabilityNumber >= (unsigned int)_captureCapabilities.size()) {
RTC_LOG(LS_ERROR) << "Invalid deviceCapabilityNumber "
<< deviceCapabilityNumber << ">= number of capabilities ("
<< _captureCapabilities.size() << ").";
return -1;
}
capability = _captureCapabilities[deviceCapabilityNumber];
return 0;
}
int32_t DeviceInfoImpl::GetBestMatchedCapability(
const char* deviceUniqueIdUTF8,
const VideoCaptureCapability& requested,
VideoCaptureCapability& resulting) {
if (!deviceUniqueIdUTF8)
return -1;
MutexLock lock(&_apiLock);
if (!absl::EqualsIgnoreCase(
deviceUniqueIdUTF8,
absl::string_view(_lastUsedDeviceName, _lastUsedDeviceNameLength))) {
if (-1 == CreateCapabilityMap(deviceUniqueIdUTF8)) {
return -1;
}
}
int32_t bestformatIndex = -1;
int32_t bestWidth = 0;
int32_t bestHeight = 0;
int32_t bestFrameRate = 0;
VideoType bestVideoType = VideoType::kUnknown;
const int32_t numberOfCapabilies =
static_cast<int32_t>(_captureCapabilities.size());
for (int32_t tmp = 0; tmp < numberOfCapabilies;
++tmp) // Loop through all capabilities
{
VideoCaptureCapability& capability = _captureCapabilities[tmp];
const int32_t diffWidth = capability.width - requested.width;
const int32_t diffHeight = capability.height - requested.height;
const int32_t diffFrameRate = capability.maxFPS - requested.maxFPS;
const int32_t currentbestDiffWith = bestWidth - requested.width;
const int32_t currentbestDiffHeight = bestHeight - requested.height;
const int32_t currentbestDiffFrameRate = bestFrameRate - requested.maxFPS;
if ((diffHeight >= 0 &&
diffHeight <= abs(currentbestDiffHeight)) // Height better or equalt
// that previouse.
|| (currentbestDiffHeight < 0 && diffHeight >= currentbestDiffHeight)) {
if (diffHeight ==
currentbestDiffHeight) // Found best height. Care about the width)
{
if ((diffWidth >= 0 &&
diffWidth <= abs(currentbestDiffWith)) // Width better or equal
|| (currentbestDiffWith < 0 && diffWidth >= currentbestDiffWith)) {
if (diffWidth == currentbestDiffWith &&
diffHeight == currentbestDiffHeight) // Same size as previously
{
// Also check the best frame rate if the diff is the same as
// previouse
if (((diffFrameRate >= 0 &&
diffFrameRate <=
currentbestDiffFrameRate) // Frame rate to high but
// better match than previouse
// and we have not selected IUV
|| (currentbestDiffFrameRate < 0 &&
diffFrameRate >=
currentbestDiffFrameRate)) // Current frame rate is
// lower than requested.
// This is better.
) {
if ((currentbestDiffFrameRate ==
diffFrameRate) // Same frame rate as previous or frame rate
// allready good enough
|| (currentbestDiffFrameRate >= 0)) {
if (bestVideoType != requested.videoType &&
requested.videoType != VideoType::kUnknown &&
(capability.videoType == requested.videoType ||
capability.videoType == VideoType::kI420 ||
capability.videoType == VideoType::kYUY2 ||
capability.videoType == VideoType::kYV12 ||
capability.videoType == VideoType::kNV12)) {
bestVideoType = capability.videoType;
bestformatIndex = tmp;
}
// If width height and frame rate is full filled we can use the
// camera for encoding if it is supported.
if (capability.height == requested.height &&
capability.width == requested.width &&
capability.maxFPS >= requested.maxFPS) {
bestVideoType = capability.videoType;
bestformatIndex = tmp;
}
} else // Better frame rate
{
bestWidth = capability.width;
bestHeight = capability.height;
bestFrameRate = capability.maxFPS;
bestVideoType = capability.videoType;
bestformatIndex = tmp;
}
}
} else // Better width than previously
{
bestWidth = capability.width;
bestHeight = capability.height;
bestFrameRate = capability.maxFPS;
bestVideoType = capability.videoType;
bestformatIndex = tmp;
}
} // else width no good
} else // Better height
{
bestWidth = capability.width;
bestHeight = capability.height;
bestFrameRate = capability.maxFPS;
bestVideoType = capability.videoType;
bestformatIndex = tmp;
}
} // else height not good
} // end for
RTC_LOG(LS_VERBOSE) << "Best camera format: " << bestWidth << "x"
<< bestHeight << "@" << bestFrameRate
<< "fps, color format: "
<< static_cast<int>(bestVideoType);
// Copy the capability
if (bestformatIndex < 0)
return -1;
resulting = _captureCapabilities[bestformatIndex];
return bestformatIndex;
}
// Default implementation. This should be overridden by Mobile implementations.
int32_t DeviceInfoImpl::GetOrientation(const char* /* deviceUniqueIdUTF8 */,
VideoRotation& orientation) {
orientation = kVideoRotation_0;
return -1;
}
} // namespace videocapturemodule
} // namespace webrtc
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