From 20d28e80a5c861a9d5f449ea911ab75b4f37ad0d Mon Sep 17 00:00:00 2001
From: Jef <jef@targetspot.com>
Date: Tue, 24 Sep 2024 14:54:57 +0200
Subject: Initial community commit

---
 Src/Plugins/Encoder/enc_flac/AudioCoderFlac.cpp | 203 ++++++++++++++++++++++++
 1 file changed, 203 insertions(+)
 create mode 100644 Src/Plugins/Encoder/enc_flac/AudioCoderFlac.cpp

(limited to 'Src/Plugins/Encoder/enc_flac/AudioCoderFlac.cpp')

diff --git a/Src/Plugins/Encoder/enc_flac/AudioCoderFlac.cpp b/Src/Plugins/Encoder/enc_flac/AudioCoderFlac.cpp
new file mode 100644
index 00000000..38bb124e
--- /dev/null
+++ b/Src/Plugins/Encoder/enc_flac/AudioCoderFlac.cpp
@@ -0,0 +1,203 @@
+#include "AudioCoderFlac.h"
+#include <bfc/platform/types.h>
+#include <FLAC/metadata.h>
+
+AudioCoderFlac::AudioCoderFlac(unsigned int nch, unsigned int bps, unsigned int samplerate, unsigned int compression)
+{
+	/* initialize stuff first so we can clean up safely if things go wrong */
+	finished = false;
+	finishedBytes = 0;
+	padding = 0;
+	encoder = 0;
+	win32State.bytesWritten = 0;
+	win32State.handle = INVALID_HANDLE_VALUE;
+	tempFile[0]=0;
+
+	wchar_t tempPath[MAX_PATH-14] = {0};
+	GetTempPath(MAX_PATH-14, tempPath);
+	GetTempFileName(tempPath, L"wfl", 0, tempFile);
+	win32State.handle = CreateFile(tempFile, GENERIC_READ|GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, 0);
+
+	if (win32State.handle != INVALID_HANDLE_VALUE)
+	{
+		this->nch = nch;
+		this->bps = bps;
+		encoder = FLAC__stream_encoder_new();
+
+		if (!encoder)
+			return;
+
+		// set stream info
+		if (!FLAC__stream_encoder_set_channels(encoder, nch)
+		    || !FLAC__stream_encoder_set_bits_per_sample(encoder, bps)
+		    || !FLAC__stream_encoder_set_sample_rate(encoder, samplerate)
+		    || !FLAC__stream_encoder_set_total_samples_estimate(encoder, 0)
+		    || !FLAC__stream_encoder_set_compression_level(encoder, compression)
+		    || !FLAC__stream_encoder_set_blocksize(encoder, 0))
+		{
+			FLAC__stream_encoder_delete(encoder);
+			encoder=0;
+			return;
+		}
+		// TODO: set any more config stuff
+
+		// TODO: seektable?
+		//FLAC__StreamMetadata *seektable = FLAC__metadata_object_new(FLAC__METADATA_TYPE_SEEKTABLE);
+
+		padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
+		if (padding)
+		{
+			padding->length = 16384; // TODO: configurable padding size
+			if (!FLAC__stream_encoder_set_metadata(encoder, &padding, 1))
+			{
+				FLAC__stream_encoder_delete(encoder);
+				encoder=0;
+				return;
+			}
+		}
+
+		if (FLAC__stream_encoder_init_stream(encoder, Win32_Write, Win32_Seek, Win32_Tell, NULL, &win32State) != FLAC__STREAM_ENCODER_INIT_STATUS_OK)
+		{
+			FLAC__stream_encoder_delete(encoder);
+			encoder=0;
+			return;
+		}
+	}
+}
+
+bool AudioCoderFlac::OK()
+{
+	if (!encoder)
+		return false;
+
+	return FLAC__stream_encoder_get_state(encoder) == FLAC__STREAM_ENCODER_OK;
+}
+
+AudioCoderFlac::~AudioCoderFlac()
+{
+	if (encoder)
+		FLAC__stream_encoder_delete(encoder);
+
+	if (padding)
+		FLAC__metadata_object_delete(padding);
+
+	if (win32State.handle != INVALID_HANDLE_VALUE)
+		CloseHandle(win32State.handle);
+
+}
+
+static void Copy8(FLAC__int32 *buffer, void *inputData, int numSamples)
+{
+	uint8_t *in = (uint8_t *)inputData;
+
+	for (int i=0;i<numSamples;i++)
+	{
+		buffer[i] = (FLAC__int32)in[i];
+	}
+}
+
+static void Copy16(FLAC__int32 *buffer, void *inputData, int numSamples)
+{
+	int16_t *in = (int16_t *)inputData;
+
+	for (int i=0;i<numSamples;i++)
+	{
+		buffer[i] = (FLAC__int32)in[i];
+	}
+}
+
+static void Copy24(FLAC__int32 *buffer, void *inputData, int numSamples)
+{
+	uint8_t *in = (uint8_t *)inputData;
+
+	for (int i=0;i<numSamples;i++)
+	{
+		FLAC__int32 val = (((FLAC__int32)in[0]) << 0);
+		val = val | (((FLAC__int32)in[1]) << 8);
+		val = val | (((FLAC__int32)in[2]) << 16);
+
+		buffer[i] = (FLAC__int32)val;
+		in+=3;
+	}
+}
+
+static void Copy32(FLAC__int32 *buffer, void *inputData, int numSamples)
+{
+	int32_t *in = (int32_t *)inputData;
+
+	for (int i=0;i<numSamples;i++)
+	{
+		buffer[i] = (FLAC__int32)in[i];
+	}
+}
+
+int AudioCoderFlac::Encode(int framepos, void *in, int in_avail, int *in_used, void *out, int out_avail)
+{
+	FLAC__int32 buffer[65536];
+
+
+	FLAC__uint64 startBytes = win32State.bytesWritten;
+
+	if (!in_avail)
+	{
+		if (finished)
+		{
+			int ret = (int)finishedBytes;
+			finishedBytes = 0;
+			return ret;
+		}
+		return 0;
+	}
+
+
+	int numSamples = in_avail/(bps/8);
+
+	if (numSamples>65536)
+		numSamples = 65536;
+
+	switch (bps)
+	{
+	case 8:
+		Copy8(buffer, in, numSamples);
+		break;
+	case 16:
+		Copy16(buffer, in, numSamples);
+		break;
+	case 24:
+		Copy24(buffer, in, numSamples);
+		break;
+	case 32:
+		Copy32(buffer, in, numSamples);
+		break;
+	}
+
+	FLAC__bool result = FLAC__stream_encoder_process_interleaved(encoder, buffer, numSamples/nch);
+
+	if (result)
+	{
+		*in_used = numSamples*(bps/8);
+		return (int)(win32State.bytesWritten - startBytes);
+	}
+
+	return 0;
+}
+
+void AudioCoderFlac::PrepareToFinish()
+{
+	FLAC__uint64 startBytes = win32State.bytesWritten;
+	FLAC__stream_encoder_finish(encoder);
+	finishedBytes =  win32State.bytesWritten - startBytes;
+}
+
+void AudioCoderFlac::Finish(const wchar_t *destination)
+{
+	if (win32State.handle != INVALID_HANDLE_VALUE)
+		CloseHandle(win32State.handle);
+
+	win32State.handle = INVALID_HANDLE_VALUE;
+	if (!MoveFile(tempFile, destination))
+	{
+		if (CopyFile(tempFile, destination, FALSE))
+			DeleteFile(tempFile);
+	}
+}
\ No newline at end of file
-- 
cgit