int CVideoEncodeVt::CreateCVPixelBuffer(const AVFrame* apFrame, CVPixelBufferRef* apPixelBuffer,
VTCompressionSessionRef aSession)
{
CVPixelBufferPoolRef pixBufPoll;
int iPlaneCnt = 0;
int iColor = 0;
int iWidths [AV_NUM_DATA_POINTERS] = {0};
int iHeights[AV_NUM_DATA_POINTERS] = {0};
int iStrides[AV_NUM_DATA_POINTERS] = {0};
int iContiguousBufSize = 0;
//取得像素信息
int ret = GetCVPixelInfo(apFrame, &iColor, &iPlaneCnt, iWidths, iHeights, iStrides, &iContiguousBufSize);
if (ret < 0)
{
CLog::GetInstance().Log(ENUM_LOG_LEVEL::enum_Log_Level5, "GetCVPixelInfo failed!");
return -1;
}
//取得像素缓冲池
pixBufPoll = VTCompressionSessionGetPixelBufferPool(aSession);
if (NULL == pixBufPoll)
{
CLog::GetInstance().Log(ENUM_LOG_LEVEL::enum_Log_Level5, "VTCompressionSessionGetPixelBufferPool failed!");
return -1;
}
//分配一个像素缓冲
ret = CVPixelBufferPoolCreatePixelBuffer(NULL, pixBufPoll, apPixelBuffer);
if (0 != ret)
{
CLog::GetInstance().Log(ENUM_LOG_LEVEL::enum_Log_Level5, "CVPixelBufferPoolCreatePixelBuffer failed!");
return -1;
}
//将图像拷贝到像素缓冲
ret = CopyFrameToPixelBuffer(apFrame, *apPixelBuffer, iStrides, iHeights);
if(ret < 0)
{
CLog::GetInstance().Log(ENUM_LOG_LEVEL::enum_Log_Level5, "CopyFrameToPixelBuffer failed!");
CFRelease(*apPixelBuffer);
apPixelBuffer = NULL;
return -1;
}
return 0;
}
static void h264_enc_process(MSFilter *f) {
VTH264EncCtx *ctx = (VTH264EncCtx *)f->data;
mblk_t *frame;
OSStatus err;
CMTime p_time = CMTimeMake(f->ticker->time, 1000);
if(!ctx->is_configured) {
ms_queue_flush(f->inputs[0]);
return;
}
#if 0 && TARGET_OS_IPHONE
CVPixelBufferPoolRef pixbuf_pool = VTCompressionSessionGetPixelBufferPool(ctx->session);
if(pixbuf_pool == NULL) {
ms_error("VideoToolbox: fails to get the pixel buffer pool");
return;
}
#endif
while((frame = ms_queue_get(f->inputs[0]))) {
YuvBuf src_yuv_frame, dst_yuv_frame = {0};
CVPixelBufferRef pixbuf;
CFMutableDictionaryRef enc_param = NULL;
int i, pixbuf_fmt = kCVPixelFormatType_420YpCbCr8Planar;
CFNumberRef value;
CFMutableDictionaryRef pixbuf_attr;
ms_yuv_buf_init_from_mblk(&src_yuv_frame, frame);
#if 0 && TARGET_OS_IPHONE
CVPixelBufferPoolCreatePixelBuffer(NULL, pixbuf_pool, &pixbuf);
#else
pixbuf_attr = CFDictionaryCreateMutable(NULL, 0, NULL, NULL);
value = CFNumberCreate(NULL, kCFNumberIntType, &pixbuf_fmt);
CFDictionarySetValue(pixbuf_attr, kCVPixelBufferPixelFormatTypeKey, value);
CVPixelBufferCreate(NULL, ctx->conf.vsize.width, ctx->conf.vsize.height, kCVPixelFormatType_420YpCbCr8Planar, pixbuf_attr, &pixbuf);
CFRelease(pixbuf_attr);
#endif
CVPixelBufferLockBaseAddress(pixbuf, 0);
dst_yuv_frame.w = (int)CVPixelBufferGetWidth(pixbuf);
dst_yuv_frame.h = (int)CVPixelBufferGetHeight(pixbuf);
for(i=0; i<3; i++) {
dst_yuv_frame.planes[i] = CVPixelBufferGetBaseAddressOfPlane(pixbuf, i);
dst_yuv_frame.strides[i] = (int)CVPixelBufferGetBytesPerRowOfPlane(pixbuf, i);
}
ms_yuv_buf_copy(src_yuv_frame.planes, src_yuv_frame.strides, dst_yuv_frame.planes, dst_yuv_frame.strides, (MSVideoSize){dst_yuv_frame.w, dst_yuv_frame.h});
CVPixelBufferUnlockBaseAddress(pixbuf, 0);
freemsg(frame);
ms_filter_lock(f);
if(ctx->fps_changed || ctx->bitrate_changed || ctx->vfu_requested) {
CFNumberRef value;
enc_param = CFDictionaryCreateMutable(NULL, 0, NULL, NULL);
if(ctx->fps_changed) {
value = CFNumberCreate(NULL, kCFNumberFloatType, &ctx->conf.fps);
CFDictionaryAddValue(enc_param, kVTCompressionPropertyKey_ExpectedFrameRate, value);
ctx->fps_changed = FALSE;
}
if(ctx->bitrate_changed) {
value = CFNumberCreate(NULL, kCFNumberIntType, &ctx->conf.required_bitrate);
CFDictionaryAddValue(enc_param, kVTCompressionPropertyKey_AverageBitRate, value);
ctx->bitrate_changed = FALSE;
}
if(ctx->vfu_requested) {
int force_keyframe = 1;
value = CFNumberCreate(NULL, kCFNumberIntType, &force_keyframe);
CFDictionaryAddValue(enc_param, kVTEncodeFrameOptionKey_ForceKeyFrame, value);
ctx->vfu_requested = FALSE;
}
}
ms_filter_unlock(f);
if(!ctx->enable_avpf) {
if(ctx->first_frame) {
ms_video_starter_first_frame(&ctx->starter, f->ticker->time);
}
if(ms_video_starter_need_i_frame(&ctx->starter, f->ticker->time)) {
if(enc_param == NULL) enc_param = CFDictionaryCreateMutable(NULL, 0, NULL, NULL);
if(CFDictionaryGetValue(enc_param, kVTEncodeFrameOptionKey_ForceKeyFrame) == NULL) {
int force_keyframe = 1;
CFNumberRef value = CFNumberCreate(NULL, kCFNumberIntType, &force_keyframe);
CFDictionaryAddValue(enc_param, kVTEncodeFrameOptionKey_ForceKeyFrame, value);
}
}
}
if((err = VTCompressionSessionEncodeFrame(ctx->session, pixbuf, p_time, kCMTimeInvalid, enc_param, NULL, NULL)) != noErr) {
ms_error("VideoToolbox: could not pass a pixbuf to the encoder: error code %d", err);
}
CFRelease(pixbuf);
ctx->first_frame = FALSE;
if(enc_param) CFRelease(enc_param);
}
ms_mutex_lock(&ctx->mutex);
while ((frame = ms_queue_get(&ctx->queue))) {
ms_mutex_unlock(&ctx->mutex);
ms_queue_put(f->outputs[0], frame);
ms_mutex_lock(&ctx->mutex);
}
ms_mutex_unlock(&ctx->mutex);
}
