1 files changed, 116 insertions, 0 deletions
diff --git a/Src/aacdec-mft/AVIAACDecoder.cpp b/Src/aacdec-mft/AVIAACDecoder.cpp
new file mode 100644
index 00000000..f2cf1591
--- /dev/null
+++ b/Src/aacdec-mft/AVIAACDecoder.cpp
@@ -0,0 +1,116 @@
+#include "AVIAACDecoder.h"
+#include <math.h>
+#include "../nsutil/pcm.h"
+
+int AVIDecoder::CreateAudioDecoder(const nsavi::AVIH *avi_header, 
+								   const nsavi::STRH *stream_header, const nsavi::STRF *stream_format, const nsavi::STRD *stream_data, 
+								   unsigned int preferred_bits, unsigned int max_channels, bool floating_point, 
+								   ifc_aviaudiodecoder **decoder)
+{
+	nsavi::audio_format *waveformat = (nsavi::audio_format *)stream_format;
+
+	if (waveformat->format == nsavi::audio_format_aac)
+	{
+		AVIAACDecoder *aac_decoder = AVIAACDecoder::Create(waveformat, preferred_bits, max_channels, floating_point);
+		if (aac_decoder)
+		{
+			*decoder = aac_decoder;
+			return CREATEDECODER_SUCCESS;
+		}
+		return CREATEDECODER_SUCCESS;
+	}
+
+	return CREATEDECODER_NOT_MINE;
+
+}
+
+#define CBCLASS AVIDecoder
+START_DISPATCH;
+CB(CREATE_AUDIO_DECODER, CreateAudioDecoder)
+END_DISPATCH;
+#undef CBCLASS
+
+AVIAACDecoder *AVIAACDecoder::Create(const nsavi::audio_format *waveformat, unsigned int preferred_bits, unsigned int max_channels, bool floating_point)
+{
+	if (!floating_point)
+	{
+		if (preferred_bits >= 24) 
+			preferred_bits=24;
+		else
+			preferred_bits=16;
+	}
+	/*if (!max_channels)
+	max_channels = 8;*/
+
+	if (waveformat->extra_size_bytes)
+	{
+		AVIAACDecoder * decoder = new AVIAACDecoder(preferred_bits, floating_point);
+		if (decoder && SUCCEEDED(decoder->decoder.Open((const unsigned char *)(waveformat + 1), waveformat->extra_size_bytes))) {
+			return decoder;
+		}
+		delete decoder;
+	}
+
+	return 0;
+}
+
+AVIAACDecoder::AVIAACDecoder(unsigned int bps, bool floating_point)
+:  bps(bps), floating_point(floating_point)
+{
+}
+
+int AVIAACDecoder::OutputFrameSize(size_t *frame_size)
+{
+	size_t local_frame_size;
+	if (FAILED(decoder.OutputBlockSizeSamples(&local_frame_size))) {
+		return AVI_FAILURE;
+	}
+
+	*frame_size = local_frame_size;
+	return AVI_SUCCESS;
+}
+
+int AVIAACDecoder::GetOutputProperties(unsigned int *sampleRate, unsigned int *channels, unsigned int *bitsPerSample, bool *isFloat)
+{
+	uint32_t local_sample_rate, local_channels;
+	HRESULT hr = decoder.GetOutputProperties(&local_sample_rate, &local_channels);
+	if (FAILED(hr)) {
+		return AVI_FAILURE;
+	}
+
+	*sampleRate = local_sample_rate;
+	*channels = local_channels;
+	*bitsPerSample = bps;
+	*isFloat = floating_point;
+	return AVI_SUCCESS;
+}
+
+int AVIAACDecoder::DecodeChunk(uint16_t type, void **inputBuffer, size_t *inputBufferBytes, void *outputBuffer, size_t *outputBufferBytes)
+{
+	if (SUCCEEDED(decoder.Feed(*inputBuffer, *inputBufferBytes))
+		&& SUCCEEDED(decoder.Decode(outputBuffer, outputBufferBytes, bps, false, 1.0))) {
+			*inputBufferBytes = 0;
+			return AVI_SUCCESS;
+	}
+	return AVI_FAILURE;
+}
+
+void AVIAACDecoder::Flush()
+{
+	decoder.Flush();
+}
+
+void AVIAACDecoder::Close()
+{
+	delete this;
+}
+
+#define CBCLASS AVIAACDecoder
+START_DISPATCH;
+CB(OUTPUT_FRAME_SIZE, OutputFrameSize)
+CB(GET_OUTPUT_PROPERTIES, GetOutputProperties)
+CB(DECODE_CHUNK, DecodeChunk)
+VCB(FLUSH, Flush)
+VCB(CLOSE, Close)
+END_DISPATCH;
+#undef CBCLASS
+\ No newline at end of file