256 lines
8.9 KiB
Plaintext
256 lines
8.9 KiB
Plaintext
//
|
|
// libtgvoip is free and unencumbered public domain software.
|
|
// For more information, see http://unlicense.org or the UNLICENSE file
|
|
// you should have received with this source code distribution.
|
|
//
|
|
|
|
#import <Foundation/Foundation.h>
|
|
#include "VideoToolboxEncoderSource.h"
|
|
#include "../../PrivateDefines.h"
|
|
#include "../../logging.h"
|
|
|
|
using namespace tgvoip;
|
|
using namespace tgvoip::video;
|
|
|
|
#define CHECK_ERR(err, msg) if(err!=noErr){LOGE("VideoToolboxEncoder: " msg " failed: %d", err); return;}
|
|
|
|
VideoToolboxEncoderSource::VideoToolboxEncoderSource(){
|
|
|
|
}
|
|
|
|
VideoToolboxEncoderSource::~VideoToolboxEncoderSource(){
|
|
if(session){
|
|
CFRelease(session);
|
|
session=NULL;
|
|
}
|
|
}
|
|
|
|
void VideoToolboxEncoderSource::Start(){
|
|
|
|
}
|
|
|
|
void VideoToolboxEncoderSource::Stop(){
|
|
|
|
}
|
|
|
|
void VideoToolboxEncoderSource::Reset(uint32_t codec, int maxResolution){
|
|
if(session){
|
|
LOGV("Releasing old compression session");
|
|
//VTCompressionSessionCompleteFrames(session, kCMTimeInvalid);
|
|
VTCompressionSessionInvalidate(session);
|
|
CFRelease(session);
|
|
session=NULL;
|
|
LOGV("Released compression session");
|
|
}
|
|
CMVideoCodecType codecType;
|
|
switch(codec){
|
|
case CODEC_AVC:
|
|
codecType=kCMVideoCodecType_H264;
|
|
break;
|
|
case CODEC_HEVC:
|
|
codecType=kCMVideoCodecType_HEVC;
|
|
break;
|
|
default:
|
|
LOGE("VideoToolboxEncoder: Unsupported codec");
|
|
return;
|
|
}
|
|
needUpdateStreamParams=true;
|
|
this->codec=codec;
|
|
// typedef void (*VTCompressionOutputCallback)(void *outputCallbackRefCon, void *sourceFrameRefCon, OSStatus status, VTEncodeInfoFlags infoFlags, CMSampleBufferRef sampleBuffer);
|
|
uint32_t width, height;
|
|
switch(maxResolution){
|
|
case INIT_VIDEO_RES_1080:
|
|
width=1920;
|
|
height=1080;
|
|
break;
|
|
case INIT_VIDEO_RES_720:
|
|
width=1280;
|
|
height=720;
|
|
break;
|
|
case INIT_VIDEO_RES_480:
|
|
width=854;
|
|
height=480;
|
|
break;
|
|
case INIT_VIDEO_RES_360:
|
|
default:
|
|
width=640;
|
|
height=360;
|
|
break;
|
|
}
|
|
OSStatus status=VTCompressionSessionCreate(NULL, width, height, codecType, NULL, NULL, NULL, [](void *outputCallbackRefCon, void *sourceFrameRefCon, OSStatus status, VTEncodeInfoFlags infoFlags, CMSampleBufferRef sampleBuffer){
|
|
reinterpret_cast<VideoToolboxEncoderSource*>(outputCallbackRefCon)->EncoderCallback(status, sampleBuffer, infoFlags);
|
|
}, this, &session);
|
|
if(status!=noErr){
|
|
LOGE("VTCompressionSessionCreate failed: %d", status);
|
|
return;
|
|
}
|
|
LOGD("Created VTCompressionSession");
|
|
status=VTSessionSetProperty(session, kVTCompressionPropertyKey_AllowFrameReordering, kCFBooleanFalse);
|
|
CHECK_ERR(status, "VTSessionSetProperty(AllowFrameReordering)");
|
|
int64_t interval=15;
|
|
status=VTSessionSetProperty(session, kVTCompressionPropertyKey_MaxKeyFrameIntervalDuration, (__bridge CFTypeRef)@(interval));
|
|
CHECK_ERR(status, "VTSessionSetProperty(MaxKeyFrameIntervalDuration)");
|
|
SetEncoderBitrateAndLimit(lastBitrate);
|
|
status=VTSessionSetProperty(session, kVTCompressionPropertyKey_RealTime, kCFBooleanTrue);
|
|
CHECK_ERR(status, "VTSessionSetProperty(RealTime)");
|
|
LOGD("VTCompressionSession initialized");
|
|
|
|
// TODO change camera frame rate dynamically based on resolution + codec
|
|
}
|
|
|
|
void VideoToolboxEncoderSource::RequestKeyFrame(){
|
|
keyframeRequested=true;
|
|
}
|
|
|
|
void VideoToolboxEncoderSource::EncodeFrame(CMSampleBufferRef frame){
|
|
if(!session)
|
|
return;
|
|
CMFormatDescriptionRef format=CMSampleBufferGetFormatDescription(frame);
|
|
CMMediaType type=CMFormatDescriptionGetMediaType(format);
|
|
if(type!=kCMMediaType_Video){
|
|
//LOGW("Received non-video CMSampleBuffer");
|
|
return;
|
|
}
|
|
if(bitrateChangeRequested){
|
|
LOGI("VideoToolboxEocnder: setting bitrate to %u", bitrateChangeRequested);
|
|
SetEncoderBitrateAndLimit(bitrateChangeRequested);
|
|
lastBitrate=bitrateChangeRequested;
|
|
bitrateChangeRequested=0;
|
|
}
|
|
CFDictionaryRef frameProps=NULL;
|
|
if(keyframeRequested){
|
|
LOGI("VideoToolboxEncoder: requesting keyframe");
|
|
const void* keys[]={kVTEncodeFrameOptionKey_ForceKeyFrame};
|
|
const void* values[]={kCFBooleanTrue};
|
|
frameProps=CFDictionaryCreate(NULL, keys, values, 1, NULL, NULL);
|
|
keyframeRequested=false;
|
|
}
|
|
|
|
//CMVideoDimensions size=CMVideoFormatDescriptionGetDimensions(format);
|
|
//LOGD("EncodeFrame %d x %d", size.width, size.height);
|
|
CVImageBufferRef imgBuffer=CMSampleBufferGetImageBuffer(frame);
|
|
//OSType pixFmt=CVPixelBufferGetPixelFormatType(imgBuffer);
|
|
//LOGV("pixel format: %c%c%c%c", PRINT_FOURCC(pixFmt));
|
|
OSStatus status=VTCompressionSessionEncodeFrame(session, imgBuffer, CMSampleBufferGetPresentationTimeStamp(frame), CMSampleBufferGetDuration(frame), frameProps, NULL, NULL);
|
|
CHECK_ERR(status, "VTCompressionSessionEncodeFrame");
|
|
if(frameProps)
|
|
CFRelease(frameProps);
|
|
}
|
|
|
|
void VideoToolboxEncoderSource::SetBitrate(uint32_t bitrate){
|
|
bitrateChangeRequested=bitrate;
|
|
}
|
|
|
|
void VideoToolboxEncoderSource::EncoderCallback(OSStatus status, CMSampleBufferRef buffer, VTEncodeInfoFlags flags){
|
|
if(status!=noErr){
|
|
LOGE("EncoderCallback error: %d", status);
|
|
return;
|
|
}
|
|
if(flags & kVTEncodeInfo_FrameDropped){
|
|
LOGW("VideoToolboxEncoder: Frame dropped");
|
|
}
|
|
if(!CMSampleBufferGetNumSamples(buffer)){
|
|
LOGW("Empty CMSampleBuffer");
|
|
return;
|
|
}
|
|
const uint8_t startCode[]={0, 0, 0, 1};
|
|
if(needUpdateStreamParams){
|
|
LOGI("VideoToolboxEncoder: Updating stream params");
|
|
CMFormatDescriptionRef format=CMSampleBufferGetFormatDescription(buffer);
|
|
CMVideoDimensions size=CMVideoFormatDescriptionGetDimensions(format);
|
|
width=size.width;
|
|
height=size.height;
|
|
csd.clear();
|
|
if(codec==CODEC_AVC){
|
|
for(size_t i=0;i<2;i++){
|
|
const uint8_t* ps=NULL;
|
|
size_t pl=0;
|
|
status=CMVideoFormatDescriptionGetH264ParameterSetAtIndex(format, i, &ps, &pl, NULL, NULL);
|
|
CHECK_ERR(status, "CMVideoFormatDescriptionGetH264ParameterSetAtIndex");
|
|
Buffer b(pl+4);
|
|
b.CopyFrom(ps, 4, pl);
|
|
b.CopyFrom(startCode, 0, 4);
|
|
csd.push_back(std::move(b));
|
|
}
|
|
}else if(codec==CODEC_HEVC){
|
|
LOGD("here1");
|
|
BufferOutputStream csdBuf(1024);
|
|
for(size_t i=0;i<3;i++){
|
|
const uint8_t* ps=NULL;
|
|
size_t pl=0;
|
|
status=CMVideoFormatDescriptionGetHEVCParameterSetAtIndex(format, i, &ps, &pl, NULL, NULL);
|
|
CHECK_ERR(status, "CMVideoFormatDescriptionGetHEVCParameterSetAtIndex");
|
|
csdBuf.WriteBytes(startCode, 4);
|
|
csdBuf.WriteBytes(ps, pl);
|
|
}
|
|
csd.push_back(std::move(csdBuf));
|
|
}
|
|
needUpdateStreamParams=false;
|
|
}
|
|
CMBlockBufferRef blockBuffer=CMSampleBufferGetDataBuffer(buffer);
|
|
size_t len=CMBlockBufferGetDataLength(blockBuffer);
|
|
|
|
int frameFlags=0;
|
|
CFArrayRef attachmentsArray=CMSampleBufferGetSampleAttachmentsArray(buffer, 0);
|
|
if(attachmentsArray && CFArrayGetCount(attachmentsArray)){
|
|
CFBooleanRef notSync;
|
|
CFDictionaryRef dict=(CFDictionaryRef)CFArrayGetValueAtIndex(attachmentsArray, 0);
|
|
BOOL keyExists=CFDictionaryGetValueIfPresent(dict, kCMSampleAttachmentKey_NotSync, (const void **)¬Sync);
|
|
if(!keyExists || !CFBooleanGetValue(notSync)){
|
|
frameFlags |= VIDEO_FRAME_FLAG_KEYFRAME;
|
|
}
|
|
}else{
|
|
frameFlags |= VIDEO_FRAME_FLAG_KEYFRAME;
|
|
}
|
|
|
|
Buffer frame(len);
|
|
CMBlockBufferCopyDataBytes(blockBuffer, 0, len, *frame);
|
|
uint32_t offset=0;
|
|
while(offset<len){
|
|
uint32_t nalLen=CFSwapInt32BigToHost(*reinterpret_cast<uint32_t*>(*frame+offset));
|
|
//LOGV("NAL length %u", nalLen);
|
|
frame.CopyFrom(startCode, offset, 4);
|
|
offset+=nalLen+4;
|
|
}
|
|
callback(std::move(frame), frameFlags);
|
|
|
|
//LOGV("EncoderCallback: %u bytes total", (unsigned int)len);
|
|
}
|
|
|
|
void VideoToolboxEncoderSource::SetEncoderBitrateAndLimit(uint32_t bitrate){
|
|
OSStatus status=VTSessionSetProperty(session, kVTCompressionPropertyKey_AverageBitRate, (__bridge CFTypeRef)@(bitrate));
|
|
CHECK_ERR(status, "VTSessionSetProperty(AverageBitRate)");
|
|
|
|
int64_t dataLimitValue=(int64_t)(bitrate/8);
|
|
CFNumberRef bytesPerSecond=CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt64Type, &dataLimitValue);
|
|
int64_t oneValue=1;
|
|
CFNumberRef one=CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt64Type, &oneValue);
|
|
const void* numbers[]={bytesPerSecond, one};
|
|
CFArrayRef limits=CFArrayCreate(NULL, numbers, 2, &kCFTypeArrayCallBacks);
|
|
status=VTSessionSetProperty(session, kVTCompressionPropertyKey_DataRateLimits, limits);
|
|
CFRelease(bytesPerSecond);
|
|
CFRelease(one);
|
|
CFRelease(limits);
|
|
CHECK_ERR(status, "VTSessionSetProperty(DataRateLimits");
|
|
}
|
|
|
|
std::vector<uint32_t> VideoToolboxEncoderSource::GetAvailableEncoders(){
|
|
std::vector<uint32_t> res;
|
|
res.push_back(CODEC_AVC);
|
|
CFArrayRef encoders;
|
|
OSStatus status=VTCopyVideoEncoderList(NULL, &encoders);
|
|
for(CFIndex i=0;i<CFArrayGetCount(encoders);i++){
|
|
CFDictionaryRef v=(CFDictionaryRef)CFArrayGetValueAtIndex(encoders, i);
|
|
NSDictionary* encoder=(__bridge NSDictionary*)v;
|
|
//NSString* name=(NSString*)CFDictionaryGetValue(v, kVTVideoEncoderList_EncoderName);
|
|
uint32_t codecType=[(NSNumber*)encoder[(NSString*)kVTVideoEncoderList_CodecType] intValue];
|
|
//LOGV("Encoders[%u]: %s, %c%c%c%c", i, [(NSString*)encoder[(NSString*)kVTVideoEncoderList_EncoderName] cStringUsingEncoding:NSUTF8StringEncoding], PRINT_FOURCC(codecType));
|
|
if(codecType==kCMVideoCodecType_HEVC){
|
|
res.push_back(CODEC_HEVC);
|
|
break;
|
|
}
|
|
}
|
|
CFRelease(encoders);
|
|
return res;
|
|
}
|