Implemented explicit flushing of buffered samples from sink to file #703

- Added `virtual ROC_ATTR_NODISCARD status::StatusCode flush()=0` pure virtual function in `sndio::ISink`. - Added this method to all ISink implementations. - Implementations that don't use buffereing are no-op. - For SoxSink, flush() sends the buffered samples to disk. - sndio::Pump invokes `flush()` when it exits from `run()`.
roc-streaming · Jul 21, 2024 · 04793ad · 04793ad
1 parent 987f5e3
commit 04793ad
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Showing 18 changed files with 66 additions and 1 deletion.
diff --git a/src/internal_modules/roc_pipeline/sender_loop.cpp b/src/internal_modules/roc_pipeline/sender_loop.cpp
@@ -221,6 +221,12 @@ status::StatusCode SenderLoop::write(audio::Frame& frame) {
     return code;
 }
 
+status::StatusCode SenderLoop::flush() {
+    core::Mutex::Lock lock(sink_mutex_);
+
+    return sink_.flush();
+}
+
 core::nanoseconds_t SenderLoop::timestamp_imp() const {
     return core::timestamp(core::ClockMonotonic);
 }

diff --git a/src/internal_modules/roc_pipeline/sender_loop.h b/src/internal_modules/roc_pipeline/sender_loop.h
@@ -152,6 +152,7 @@ class SenderLoop : public PipelineLoop, private sndio::ISink {
     virtual core::nanoseconds_t latency() const;
     virtual bool has_clock() const;
     virtual status::StatusCode write(audio::Frame& frame);
+    virtual ROC_ATTR_NODISCARD status::StatusCode flush();
 
     // Methods of PipelineLoop
     virtual core::nanoseconds_t timestamp_imp() const;

diff --git a/src/internal_modules/roc_pipeline/sender_sink.cpp b/src/internal_modules/roc_pipeline/sender_sink.cpp
@@ -205,5 +205,9 @@ status::StatusCode SenderSink::write(audio::Frame& frame) {
     return code;
 }
 
+status::StatusCode SenderSink::flush() {
+    return status::StatusOK;
+}
+
 } // namespace pipeline
 } // namespace roc
diff --git a/src/internal_modules/roc_pipeline/sender_sink.h b/src/internal_modules/roc_pipeline/sender_sink.h
@@ -109,6 +109,9 @@ class SenderSink : public sndio::ISink, public core::NonCopyable<> {
     //! Write frame.
     virtual ROC_ATTR_NODISCARD status::StatusCode write(audio::Frame& frame);
 
+    //! Flush buffered samples to disk
+    virtual ROC_ATTR_NODISCARD status::StatusCode flush();
+
 private:
     SenderSinkConfig sink_config_;
 

diff --git a/src/internal_modules/roc_pipeline/transcoder_sink.cpp b/src/internal_modules/roc_pipeline/transcoder_sink.cpp
@@ -129,5 +129,9 @@ status::StatusCode TranscoderSink::write(audio::Frame& frame) {
     return frame_writer_->write(frame);
 }
 
+status::StatusCode TranscoderSink::flush() {
+    return status::StatusOK;
+}
+
 } // namespace pipeline
 } // namespace roc
diff --git a/src/internal_modules/roc_pipeline/transcoder_sink.h b/src/internal_modules/roc_pipeline/transcoder_sink.h
@@ -69,6 +69,9 @@ class TranscoderSink : public sndio::ISink, public core::NonCopyable<> {
     //! Write frame.
     virtual ROC_ATTR_NODISCARD status::StatusCode write(audio::Frame& frame);
 
+    //! Flush buffered samples to disk
+    virtual ROC_ATTR_NODISCARD status::StatusCode flush();
+
 private:
     audio::FrameFactory frame_factory_;
 

diff --git a/src/internal_modules/roc_sndio/isink.h b/src/internal_modules/roc_sndio/isink.h
@@ -14,6 +14,7 @@
 
 #include "roc_audio/iframe_writer.h"
 #include "roc_sndio/idevice.h"
+#include "roc_status/status_code.h"
 
 namespace roc {
 namespace sndio {
@@ -22,6 +23,9 @@ namespace sndio {
 class ISink : virtual public IDevice, public audio::IFrameWriter {
 public:
     virtual ~ISink();
+
+    //! Flush buffered samples to disk
+    virtual ROC_ATTR_NODISCARD status::StatusCode flush() = 0;
 };
 
 } // namespace sndio

diff --git a/src/internal_modules/roc_sndio/pump.cpp b/src/internal_modules/roc_sndio/pump.cpp
@@ -74,7 +74,7 @@ status::StatusCode Pump::run() {
 
     roc_log(LogDebug, "pump: exiting main loop");
 
-    return code;
+    return sink_.flush();
 }
 
 void Pump::stop() {

diff --git a/src/internal_modules/roc_sndio/target_pulseaudio/roc_sndio/pulseaudio_device.cpp b/src/internal_modules/roc_sndio/target_pulseaudio/roc_sndio/pulseaudio_device.cpp
@@ -326,6 +326,10 @@ status::StatusCode PulseaudioDevice::write(audio::Frame& frame) {
     return handle_request_(frame.bytes(), frame.num_bytes());
 }
 
+status::StatusCode PulseaudioDevice::flush() {
+    return status::StatusOK;
+}
+
 status::StatusCode PulseaudioDevice::read(audio::Frame& frame,
                                           packet::stream_timestamp_t duration,
                                           audio::FrameReadMode mode) {

diff --git a/src/internal_modules/roc_sndio/target_pulseaudio/roc_sndio/pulseaudio_device.h b/src/internal_modules/roc_sndio/target_pulseaudio/roc_sndio/pulseaudio_device.h
@@ -98,6 +98,9 @@ class PulseaudioDevice : public ISink, public ISource, public core::NonCopyable<
          packet::stream_timestamp_t duration,
          audio::FrameReadMode mode);
 
+    //! Flush buffered samples to disk
+    virtual ROC_ATTR_NODISCARD status::StatusCode flush();
+
 private:
     static void context_state_cb_(pa_context* context, void* userdata);
 

diff --git a/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_sink.cpp b/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_sink.cpp
@@ -244,6 +244,10 @@ status::StatusCode SndfileSink::write(audio::Frame& frame) {
     return status::StatusOK;
 }
 
+status::StatusCode SndfileSink::flush() {
+    return status::StatusOK;
+}
+
 status::StatusCode SndfileSink::open_(const char* driver, const char* path) {
     if (!map_to_sndfile(&driver, path, file_info_)) {
         roc_log(LogDebug,

diff --git a/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_sink.h b/src/internal_modules/roc_sndio/target_sndfile/roc_sndio/sndfile_sink.h
@@ -66,6 +66,9 @@ class SndfileSink : public ISink, public core::NonCopyable<> {
     //! Write frame.
     virtual ROC_ATTR_NODISCARD status::StatusCode write(audio::Frame& frame);
 
+    //! Flush buffered samples to disk
+    virtual ROC_ATTR_NODISCARD status::StatusCode flush();
+
 private:
     status::StatusCode open_(const char* driver, const char* path);
     void close_();

diff --git a/src/internal_modules/roc_sndio/target_sox/roc_sndio/sox_sink.cpp b/src/internal_modules/roc_sndio/target_sox/roc_sndio/sox_sink.cpp
@@ -217,6 +217,14 @@ status::StatusCode SoxSink::write(audio::Frame& frame) {
     return status::StatusOK;
 }
 
+status::StatusCode SoxSink::flush() {
+    if (fflush((FILE*)output_->fp) == 0) {
+        return status::StatusOK;
+    }
+
+    return status::StatusErrFile;
+}
+
 status::StatusCode SoxSink::init_names_(const char* driver, const char* path) {
     if (driver) {
         if (!driver_name_.assign(driver)) {

diff --git a/src/internal_modules/roc_sndio/target_sox/roc_sndio/sox_sink.h b/src/internal_modules/roc_sndio/target_sox/roc_sndio/sox_sink.h
@@ -78,6 +78,9 @@ class SoxSink : public ISink, public core::NonCopyable<> {
     //! Write frame.
     virtual ROC_ATTR_NODISCARD status::StatusCode write(audio::Frame& frame);
 
+    //! Flush buffered samples to disk.
+    virtual ROC_ATTR_NODISCARD status::StatusCode flush();
+
 private:
     status::StatusCode init_names_(const char* driver, const char* path);
     status::StatusCode init_buffer_();

diff --git a/src/internal_modules/roc_sndio/wav_sink.cpp b/src/internal_modules/roc_sndio/wav_sink.cpp
@@ -138,6 +138,10 @@ status::StatusCode WavSink::write(audio::Frame& frame) {
     return status::StatusOK;
 }
 
+status::StatusCode WavSink::flush() {
+    return status::StatusOK;
+}
+
 status::StatusCode WavSink::open_(const char* path) {
     if (output_file_) {
         roc_panic("wav sink: already opened");

diff --git a/src/internal_modules/roc_sndio/wav_sink.h b/src/internal_modules/roc_sndio/wav_sink.h
@@ -63,6 +63,9 @@ class WavSink : public ISink, public core::NonCopyable<> {
     //! Write frame.
     virtual ROC_ATTR_NODISCARD status::StatusCode write(audio::Frame& frame);
 
+    //! Flush buffered samples to disk
+    virtual ROC_ATTR_NODISCARD status::StatusCode flush();
+
 private:
     status::StatusCode open_(const char* path);
     void close_();

diff --git a/src/tests/roc_pipeline/test_helpers/mock_sink.h b/src/tests/roc_pipeline/test_helpers/mock_sink.h
@@ -75,6 +75,10 @@ class MockSink : public sndio::ISink, public core::NonCopyable<> {
         return status::StatusOK;
     }
 
+    virtual ROC_ATTR_NODISCARD status::StatusCode flush() {
+        return status::StatusOK;
+    }
+
     void expect_frames(size_t total) {
         UNSIGNED_LONGS_EQUAL(total, n_frames_);
     }

diff --git a/src/tests/roc_sndio/test_helpers/mock_sink.h b/src/tests/roc_sndio/test_helpers/mock_sink.h
@@ -82,6 +82,10 @@ class MockSink : public ISink {
         }
     }
 
+    virtual ROC_ATTR_NODISCARD status::StatusCode flush() {
+        return status::StatusOK;
+    }
+
 private:
     enum { MaxSz = 256 * 1024 };