Added some missing pieces to get the engine to work with our codec API.

It's even working a bit (you hear something that's at least similar to
what you should hear :).
Since the underlying engine doesn't differentiate between container and
contents, this looks like a hack, too.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@6165 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/media/plugins/musepack/MusePackDecoder.cpp

@@ -5,9 +5,7 @@
 
 
 #include "MusePackDecoder.h"
-
-#include <ByteOrder.h>
-#include <InterfaceDefs.h>
+#include "mpc/in_mpc.h"
 
 
 MusePackDecoder::MusePackDecoder()
@@ -17,29 +15,59 @@ MusePackDecoder::MusePackDecoder()
 
 MusePackDecoder::~MusePackDecoder()
 {
+	delete fDecoder;
 }
 
 
 status_t 
 MusePackDecoder::Setup(media_format *ioEncodedFormat, const void *infoBuffer, int32 infoSize)
 {
+	if (infoBuffer == NULL || infoSize != sizeof(MPC_decoder))
+		return B_BAD_VALUE;
+
+	fDecoder = (MPC_decoder *)infoBuffer;
+	return B_OK;
 }
 
 
 status_t 
-MusePackDecoder::NegotiateOutputFormat(media_format *ioDecodedFormat)
+MusePackDecoder::NegotiateOutputFormat(media_format *format)
 {
+	// ToDo: rework the underlying MPC engine to be more flexible
+
+	format->type = B_MEDIA_RAW_AUDIO;
+	format->u.raw_audio.frame_rate = fDecoder->fInfo->simple.SampleFreq;
+	format->u.raw_audio.channel_count = fDecoder->fInfo->simple.Channels;
+	format->u.raw_audio.format = media_raw_audio_format::B_AUDIO_FLOAT;
+	format->u.raw_audio.byte_order = B_MEDIA_HOST_ENDIAN;
+	format->u.raw_audio.buffer_size = sizeof(MPC_SAMPLE_FORMAT) * FRAMELEN * 2 * 2;
+		// the buffer size is hardcoded in the MPC engine...
+
+	if (format->u.raw_audio.channel_mask == 0) {
+		format->u.raw_audio.channel_mask = (format->u.raw_audio.channel_count == 1) ?
+			B_CHANNEL_LEFT : B_CHANNEL_LEFT | B_CHANNEL_RIGHT;
+	}
+
+	return B_OK;
 }
 
 
 status_t 
 MusePackDecoder::Seek(uint32 seekTo, int64 seekFrame, int64 *frame, bigtime_t seekTime, bigtime_t *time)
 {
+	return B_OK;
 }
 
 
 status_t 
-MusePackDecoder::Decode(void *buffer, int64 *frameCount, media_header *mediaHeader, media_decode_info *info)
+MusePackDecoder::Decode(void *buffer, int64 *_frameCount, media_header *mediaHeader, media_decode_info *info)
 {
+	// ToDo: add error checking (check for broken frames)
+
+	uint32 ring = fDecoder->Zaehler;
+	*_frameCount = fDecoder->DECODE((MPC_SAMPLE_FORMAT *)buffer);
+	fDecoder->UpdateBuffer(ring);
+
+	return B_OK;
 }
 

src/add-ons/media/plugins/musepack/MusePackDecoder.h

@@ -9,6 +9,8 @@
 #include "DecoderPlugin.h"
 #include <MediaFormats.h>
 
+#include "mpc/mpc_dec.h"
+
 
 class MusePackDecoder : public Decoder {
 	public:
@@ -27,6 +29,8 @@ class MusePackDecoder : public Decoder {
 					media_header *mediaHeader, media_decode_info *info);
 
 	private:
+		MPC_decoder	*fDecoder;
+		StreamInfo	*fInfo;
 };
 
 #endif	/* MUSEPACK_DECODER_H */

src/add-ons/media/plugins/musepack/MusePackReader.cpp

@@ -92,8 +92,19 @@ MusePackReader::GetStreamInfo(void *cookie, int64 *_frameCount, bigtime_t *_dura
 	BMediaFormats formats;
 	formats.GetFormatFor(description, format);
 
-	*_infoBuffer = NULL;
-	*_infoSize = 0;
+	// allocate and initialize internal decoder
+	MPC_decoder *decoder = new MPC_decoder(static_cast<BPositionIO *>(Source()));
+	decoder->RESET_Globals();
+	decoder->RESET_Synthesis();
+	decoder->SetStreamInfo(&fInfo);
+	if (!decoder->FileInit()) {
+		delete decoder;
+		return B_ERROR;
+	}
+
+	// we provide the stream info in this place
+	*_infoBuffer = (void *)decoder;
+	*_infoSize = sizeof(MPC_decoder);
 
 	return B_OK;
 }
@@ -102,7 +113,9 @@ MusePackReader::GetStreamInfo(void *cookie, int64 *_frameCount, bigtime_t *_dura
 status_t 
 MusePackReader::Seek(void *cookie, uint32 seekTo, int64 *frame, bigtime_t *time)
 {
-	return B_ERROR;
+	// we don't care, let the decoder do the work...
+	// (MPC not really differentiates between decoder and container)
+	return B_OK;
 }
 
 
@@ -110,6 +123,7 @@ status_t
 MusePackReader::GetNextChunk(void *cookie, void **chunkBuffer, int32 *chunkSize,
 	media_header *mediaHeader)
 {
+	// this one will never be called by our decoder
 	return B_ERROR;
 }