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refactor: clean up ndiout — fix hardcoded 1920, consistent naming

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Fix: c * 1920 → c * samples_per_frame (broke non-25fps or non-48kHz).
Fix: audio channel loop now iterates `channels` not `audio_slices.count`.

Rename: mxl_stride → video_stride, no_samples → samples_per_frame,
ndi_frame_10bit/16bit → v210_frame/p216_frame, ndi_audio_frame → ndi_audio.
Scope `ast` locally to its use block.
Drop unused #include "V210.hpp" and #include "FlowDef.hpp".
ndi_audio struct zero-initialized then filled only when has_audio.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
JohannesItten
2026-07-03 09:58:06 +03:00
parent ba3c2994ee
commit b7fb54e2bc
1 changed files with 96 additions and 97 deletions
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nodes/ndiout/main.cpp
+95 -96
View File
@@ -6,8 +6,6 @@
#include <mxl/flow.h>
#include <mxl/time.h>
#include "NodeBase.hpp"
#include "FlowDef.hpp"
#include "V210.hpp"
#include <Processing.NDI.Lib.h>
// RAII wrapper: init NDI, create sender, destroy both on scope exit.
@@ -35,6 +33,7 @@ struct NDIContext {
class NDIOutNode : public dmf::NodeBase {
void run() override {
// --- video flow ---
const auto flow_info = config().at("flow_id");
const auto flow_id = flow_info.at("id").get<std::string>();
const int width = flow_info.value("width", 1920);
@@ -42,7 +41,7 @@ class NDIOutNode : public dmf::NodeBase {
const int fps_num = flow_info.value("fps_num", 25);
const int fps_den = flow_info.value("fps_den", 1);
log("flow=%s", flow_id.c_str());
log("flow=%s %dx%d @ %d/%d fps", flow_id.c_str(), width, height, fps_num, fps_den);
log("waiting for flow to become active...");
bool active = false;
@@ -53,119 +52,114 @@ class NDIOutNode : public dmf::NodeBase {
if (!dmf::g_running) return;
log("flow active — starting read");
mxlFlowReader video_reader{};
mxlStatus vst = mxlCreateFlowReader(instance(), flow_id.c_str(), nullptr, &video_reader);
if (vst != MXL_STATUS_OK) {
log("mxlCreateFlowReader failed (status=%d)", vst);
return;
}
mxlFlowReader video_reader{};
mxlFlowConfigInfo video_cfg{};
mxlStatus vst = mxlCreateFlowReader(instance(), flow_id.c_str(), nullptr, &video_reader);
if (vst != MXL_STATUS_OK) { log("mxlCreateFlowReader failed (status=%d)", vst); return; }
mxlFlowReaderGetConfigInfo(video_reader, &video_cfg);
const uint32_t mxl_stride = video_cfg.discrete.sliceSizes[0];
const uint32_t video_stride = video_cfg.discrete.sliceSizes[0];
NDIContext ndi(flow_id.c_str());
// V210 (10-bit) intermediate and P216 (16-bit) send buffers
std::vector<uint8_t> buf_10bit(mxl_stride * height);
std::vector<uint8_t> buf_16bit(width * sizeof(uint16_t) * 2 * height);
NDIlib_video_frame_v2_t ndi_frame_10bit{};
ndi_frame_10bit.xres = width;
ndi_frame_10bit.yres = height;
ndi_frame_10bit.frame_rate_N = fps_num;
ndi_frame_10bit.frame_rate_D = fps_den;
ndi_frame_10bit.FourCC = static_cast<NDIlib_FourCC_video_type_e>(NDI_LIB_FOURCC('V','2','1','0'));
ndi_frame_10bit.line_stride_in_bytes = mxl_stride;
ndi_frame_10bit.p_data = buf_10bit.data();
NDIlib_video_frame_v2_t ndi_frame_16bit{};
ndi_frame_16bit.xres = width;
ndi_frame_16bit.yres = height;
ndi_frame_16bit.frame_rate_N = fps_num;
ndi_frame_16bit.frame_rate_D = fps_den;
ndi_frame_16bit.line_stride_in_bytes = width * static_cast<int>(sizeof(uint16_t));
ndi_frame_16bit.p_data = buf_16bit.data();
// audio
mxlFlowReader audio_reader{};
// --- audio flow (optional) ---
mxlFlowReader audio_reader{};
mxlFlowConfigInfo audio_cfg{};
mxlStatus ast;
int sample_rate = 0;
int channels = 0;
int samples_per_frame = 0;
bool has_audio = config().contains("audio_flow_id");
int sample_rate = 0;
int channels = 0;
int bit_depth = 32;
int no_samples = 0;
bool has_audio = config().contains("audio_flow_id");
if (has_audio)
{
if (has_audio) {
const auto audio_flow_info = config().at("audio_flow_id");
const auto audio_flow_id = audio_flow_info.at("id").get<std::string>();
ast = mxlCreateFlowReader(instance(), audio_flow_id.c_str(), nullptr, &audio_reader);
const auto audio_flow_id = audio_flow_info.at("id").get<std::string>();
sample_rate = audio_flow_info.value("sample_rate", 48000);
channels = audio_flow_info.value("channels", 2);
samples_per_frame = sample_rate / fps_num;
log("audio flow=%s %d Hz %dch %d samples/frame",
audio_flow_id.c_str(), sample_rate, channels, samples_per_frame);
mxlStatus ast = mxlCreateFlowReader(instance(), audio_flow_id.c_str(), nullptr, &audio_reader);
if (ast != MXL_STATUS_OK) {
log("audio mxlCreateFlowReader failed (status=%d) — continuing without audio", ast);
has_audio = false;
} else {
mxlFlowReaderGetConfigInfo(audio_reader, &audio_cfg);
sample_rate = audio_flow_info.at("sample_rate").get<int>();
channels = audio_cfg.continuous.channelCount;
no_samples = sample_rate / fps_num;
log("audio channels: %i, samples: %i", channels, audio_cfg.continuous.bufferLength);
log("audio channels=%u buffer=%u samples",
audio_cfg.continuous.channelCount, audio_cfg.continuous.bufferLength);
}
}
NDIlib_audio_frame_v3_t ndi_audio_frame;
ndi_audio_frame.sample_rate = sample_rate;
ndi_audio_frame.no_channels = channels;
ndi_audio_frame.no_samples = no_samples;
ndi_audio_frame.FourCC = NDIlib_FourCC_audio_type_FLTP;
ndi_audio_frame.channel_stride_in_bytes = ndi_audio_frame.no_samples * sizeof(float);
NDIContext ndi(flow_id.c_str());
// core loop
// V210 intermediate and P216 send buffers for NDI video
std::vector<uint8_t> v210_buf(video_stride * height);
std::vector<uint8_t> p216_buf(width * sizeof(uint16_t) * 2 * height);
NDIlib_video_frame_v2_t v210_frame{};
v210_frame.xres = width;
v210_frame.yres = height;
v210_frame.frame_rate_N = fps_num;
v210_frame.frame_rate_D = fps_den;
v210_frame.FourCC = static_cast<NDIlib_FourCC_video_type_e>(NDI_LIB_FOURCC('V','2','1','0'));
v210_frame.line_stride_in_bytes = video_stride;
v210_frame.p_data = v210_buf.data();
NDIlib_video_frame_v2_t p216_frame{};
p216_frame.xres = width;
p216_frame.yres = height;
p216_frame.frame_rate_N = fps_num;
p216_frame.frame_rate_D = fps_den;
p216_frame.line_stride_in_bytes = width * static_cast<int>(sizeof(uint16_t));
p216_frame.p_data = p216_buf.data();
// Float planar buffer for NDI audio (ch0 samples, ch1 samples, ...)
std::vector<float> audio_planar(static_cast<size_t>(channels) * samples_per_frame);
NDIlib_audio_frame_v3_t ndi_audio{};
if (has_audio) {
ndi_audio.sample_rate = sample_rate;
ndi_audio.no_channels = channels;
ndi_audio.no_samples = samples_per_frame;
ndi_audio.FourCC = NDIlib_FourCC_audio_type_FLTP;
ndi_audio.channel_stride_in_bytes = samples_per_frame * sizeof(float);
ndi_audio.p_data = reinterpret_cast<uint8_t*>(audio_planar.data());
}
// --- main loop ---
const mxlRational video_rate = {fps_num, fps_den};
const mxlRational audio_rate = {sample_rate, 1};
uint64_t video_index = mxlGetCurrentIndex(&video_rate);
uint64_t audio_index = has_audio ? mxlGetCurrentIndex(&audio_rate) : 0;
uint64_t frame_count = 0;
uint64_t invalid_count = 0;
uint64_t late_count = 0;
uint64_t video_index = mxlGetCurrentIndex(&video_rate);
uint64_t audio_index = has_audio ? mxlGetCurrentIndex(&audio_rate) : 0;
uint64_t frame_count = 0;
uint64_t invalid_count = 0;
uint64_t late_count = 0;
uint64_t ndi_frame_count = 0;
auto wall_start = std::chrono::steady_clock::now();
auto last_log_time = wall_start;
std::vector<float> audio_planar(static_cast<size_t>(channels) * no_samples);
ndi_audio_frame.p_data = reinterpret_cast<uint8_t*>(audio_planar.data());
auto wall_start = std::chrono::steady_clock::now();
auto last_log_time = wall_start;
while (dmf::g_running.load(std::memory_order_relaxed)) {
mxlGrainInfo video_grain{};
mxlGrainInfo audio_grain{};
uint8_t* video_buf = nullptr;
mxlWrappedMultiBufferSlice audio_slices;
vst = mxlFlowReaderGetGrainNonBlocking(video_reader, video_index, &video_grain, &video_buf);
bool ndi_has_connections = NDIlib_send_get_no_connections(ndi.sender, 0) > 0;
// --- audio: non-blocking, one chunk per video frame ---
if (has_audio) {
ast = mxlFlowReaderGetSamplesNonBlocking(audio_reader, audio_index, no_samples, &audio_slices);
mxlWrappedMultiBufferSlice audio_slices{};
mxlStatus ast = mxlFlowReaderGetSamplesNonBlocking(
audio_reader, audio_index, samples_per_frame, &audio_slices);
if (ast == MXL_STATUS_OK) {
for (size_t c = 0; c < audio_slices.count; c++) {
float* dst = audio_planar.data() + c * 1920;
size_t frag0_samples = audio_slices.base.fragments[0].size / sizeof(float);
const uint8_t* src0 = static_cast<const uint8_t*>(audio_slices.base.fragments[0].pointer)
+ c * audio_slices.stride;
std::memcpy(dst, src0, frag0_samples * sizeof(float));
if (audio_slices.base.fragments[1].size > 0) {
size_t frag1_samples = audio_slices.base.fragments[1].size / sizeof(float);
const uint8_t* src1 = static_cast<const uint8_t*>(audio_slices.base.fragments[1].pointer)
+ c * audio_slices.stride;
std::memcpy(dst + frag0_samples, src1, frag1_samples * sizeof(float));
const size_t frag0 = audio_slices.base.fragments[0].size / sizeof(float);
const size_t frag1 = audio_slices.base.fragments[1].size / sizeof(float);
for (int c = 0; c < channels; ++c) {
float* dst = audio_planar.data() + c * samples_per_frame;
const auto* src0 = reinterpret_cast<const float*>(
static_cast<const uint8_t*>(audio_slices.base.fragments[0].pointer)
+ c * audio_slices.stride);
std::memcpy(dst, src0, frag0 * sizeof(float));
if (frag1 > 0) {
const auto* src1 = reinterpret_cast<const float*>(
static_cast<const uint8_t*>(audio_slices.base.fragments[1].pointer)
+ c * audio_slices.stride);
std::memcpy(dst + frag0, src1, frag1 * sizeof(float));
}
}
NDIlib_send_send_audio_v3(ndi.sender, &ndi_audio_frame);
audio_index += no_samples;
NDIlib_send_send_audio_v3(ndi.sender, &ndi_audio);
audio_index += samples_per_frame;
} else if (ast == MXL_ERR_OUT_OF_RANGE_TOO_LATE) {
mxlFlowRuntimeInfo ari{};
mxlFlowReaderGetRuntimeInfo(audio_reader, &ari);
@@ -173,16 +167,21 @@ class NDIOutNode : public dmf::NodeBase {
}
}
// --- video ---
mxlGrainInfo video_grain{};
uint8_t* video_buf = nullptr;
vst = mxlFlowReaderGetGrainNonBlocking(video_reader, video_index, &video_grain, &video_buf);
if (vst == MXL_STATUS_OK) {
frame_count++;
if (video_grain.flags & MXL_GRAIN_FLAG_INVALID) invalid_count++;
if (ndi_has_connections) {
std::memcpy(ndi_frame_10bit.p_data, video_buf, mxl_stride * height);
NDIlib_util_V210_to_P216(&ndi_frame_10bit, &ndi_frame_16bit);
NDIlib_send_send_video_v2(ndi.sender, &ndi_frame_16bit);
if (NDIlib_send_get_no_connections(ndi.sender, 0) > 0) {
std::memcpy(v210_frame.p_data, video_buf, video_stride * height);
NDIlib_util_V210_to_P216(&v210_frame, &p216_frame);
NDIlib_send_send_video_v2(ndi.sender, &p216_frame);
if (++ndi_frame_count == 1)
log("NDI receiver connected");
log("first NDI receiver connected");
} else {
ndi_frame_count = 0;
}