Initial community commit

Src/aacdec-mft/FLVAACDecoder.cpp

@@ -0,0 +1,115 @@
+#include "FLVAACDecoder.h"
+#include <math.h>
+#include "../nsutil/pcm.h"
+
+int FLVDecoder::CreateAudioDecoder(int stereo, int bits, int sample_rate, int format_type, ifc_flvaudiodecoder **decoder)
+{
+	if (format_type == FLV::AUDIO_FORMAT_AAC)
+	{
+		FLVAAC *aac = new FLVAAC();
+		if (!aac)
+		{
+			return CREATEDECODER_FAILURE;
+		}
+		*decoder = aac;
+		return CREATEDECODER_SUCCESS;
+	}
+	return CREATEDECODER_NOT_MINE;
+}
+
+int FLVDecoder::HandlesAudio(int format_type)
+{
+	if (format_type == FLV::AUDIO_FORMAT_AAC)
+	{
+		return CREATEDECODER_SUCCESS;
+	}
+	return CREATEDECODER_NOT_MINE;
+}
+
+#define CBCLASS FLVDecoder
+START_DISPATCH;
+CB(CREATE_AUDIO_DECODER, CreateAudioDecoder)
+CB(HANDLES_AUDIO, HandlesAudio)
+END_DISPATCH;
+#undef CBCLASS
+
+/* --- */
+FLVAAC::FLVAAC()
+{
+	bps = 16;
+	preDelay=0;
+	got_decoder_config = false;
+}
+
+int FLVAAC::GetOutputFormat(unsigned int *sample_rate, unsigned int *channels, unsigned int *_bits)
+{
+	uint32_t local_sample_rate, local_channels;
+	HRESULT hr = decoder.GetOutputProperties(&local_sample_rate, &local_channels);
+	if (FAILED(hr)) {
+		return FLV_AUDIO_FAILURE;
+	}
+
+	*sample_rate = local_sample_rate;
+	*channels = local_channels;
+
+	*_bits = bps;
+	return FLV_AUDIO_SUCCESS;
+}
+
+int FLVAAC::DecodeSample(const void *input_buffer, size_t input_buffer_bytes, void *samples, size_t *samples_size_bytes, double *bitrate)
+{
+	const uint8_t *type = (const uint8_t *)input_buffer;
+	if (type[0] == 0)
+	{
+		decoder.Open(type+1, input_buffer_bytes-1);
+
+		got_decoder_config=true;
+		*samples_size_bytes=0;
+		return FLV_AUDIO_SUCCESS;
+		return FLV_AUDIO_FAILURE;
+	}
+	else if (type[0] == 1)
+	{
+		decoder.Feed(input_buffer, input_buffer_bytes);
+		decoder.Decode(samples, samples_size_bytes, bps, false, 1.0);
+		*bitrate = 0;
+		return FLV_AUDIO_SUCCESS;
+		
+	}
+	else
+		return FLV_AUDIO_FAILURE;
+}
+
+void FLVAAC::Flush()
+{
+	decoder.Flush();
+}
+
+void FLVAAC::Close()
+{
+	delete this;
+}
+
+int FLVAAC::Ready()
+{
+	return !!got_decoder_config;
+}
+
+void FLVAAC::SetPreferences(unsigned int _max_channels, unsigned int preferred_bits)
+{
+	if (preferred_bits)
+		bps = preferred_bits;
+
+	// TODO: max channels
+}
+
+#define CBCLASS FLVAAC
+START_DISPATCH;
+CB(FLV_AUDIO_GETOUTPUTFORMAT, GetOutputFormat)
+CB(FLV_AUDIO_DECODE, DecodeSample)
+VCB(FLV_AUDIO_FLUSH, Flush)
+VCB(FLV_AUDIO_CLOSE, Close)
+CB(FLV_AUDIO_READY, Ready)
+VCB(FLV_AUDIO_SETPREFERENCES, SetPreferences)
+END_DISPATCH;
+#undef CBCLASS