Implemented some basic functionality (namely Sniff() and GetStreamInfo()).

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@6134 a95241bf-73f2-0310-859d-f6bbb57e9c96

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

@@ -5,9 +5,11 @@
 
 
 #include "MusePackReader.h"
+#include "mpc/mpc_dec.h"
 
-#include <ByteOrder.h>
 #include <InterfaceDefs.h>
+#include <stdio.h>
+#include <string.h>
 
 
 MusePackReader::MusePackReader()
@@ -23,12 +25,29 @@ MusePackReader::~MusePackReader()
 const char *
 MusePackReader::Copyright()
 {
+	return "MusePack reader, " B_UTF8_COPYRIGHT " by Axel Dörfler";
 }
 
 
 status_t 
-MusePackReader::Sniff(int32 *streamCount)
+MusePackReader::Sniff(int32 *_streamCount)
 {
+	BPositionIO *file = dynamic_cast<BPositionIO *>(Source());
+	if (file == NULL)
+		// we cannot handle non seekable files for now
+		return B_ERROR;
+
+	file->Seek(0, SEEK_SET);
+	int error = fInfo.ReadStreamInfo(file);
+	if (error > B_OK) {
+		// error came from engine
+		printf("MusePack: ReadStreamInfo() engine error %d\n", error);
+		return B_ERROR;
+	} else if (error < B_OK)
+		return error;
+
+	*_streamCount = 1;
+	return B_OK;
 }
 
 
@@ -39,31 +58,58 @@ MusePackReader::GetFileFormatInfo(media_file_format *mff)
 
 
 status_t 
-MusePackReader::AllocateCookie(int32 streamNumber, void **cookie)
+MusePackReader::AllocateCookie(int32 streamNumber, void **_cookie)
 {
+	// we don't need a cookie - we only know one single stream
+	*_cookie = NULL;
+	return B_OK;
 }
 
 
 status_t 
 MusePackReader::FreeCookie(void *cookie)
 {
+	// nothing to do here
+	return B_OK;
 }
 
 
 status_t 
-MusePackReader::GetStreamInfo(void *cookie, int64 *frameCount, bigtime_t *duration, media_format *format, void **infoBuffer, int32 *infoSize)
+MusePackReader::GetStreamInfo(void *cookie, int64 *_frameCount, bigtime_t *_duration,
+	media_format *format, void **_infoBuffer, int32 *_infoSize)
 {
+	if (cookie != NULL)
+		return B_BAD_VALUE;
+
+	*_frameCount = fInfo.simple.Frames;
+	*_duration = bigtime_t(1000.0 * (fInfo.simple.Frames - 0.5) * FRAMELEN
+		/ (fInfo.simple.SampleFreq / 1000) + 0.5);
+
+	media_format_description description;
+	description.family = B_MISC_FORMAT_FAMILY;
+	description.u.misc.codec = 'MPC7';
+		// ToDo: does this make any sense? BTW '7' is the most recent stream version...
+	BMediaFormats formats;
+	formats.GetFormatFor(description, format);
+
+	*_infoBuffer = NULL;
+	*_infoSize = 0;
+
+	return B_OK;
 }
 
 
 status_t 
 MusePackReader::Seek(void *cookie, uint32 seekTo, int64 *frame, bigtime_t *time)
 {
+	return B_ERROR;
 }
 
 
 status_t 
-MusePackReader::GetNextChunk(void *cookie, void **chunkBuffer, int32 *chunkSize, media_header *mediaHeader)
+MusePackReader::GetNextChunk(void *cookie, void **chunkBuffer, int32 *chunkSize,
+	media_header *mediaHeader)
 {
+	return B_ERROR;
 }
 

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

@@ -9,6 +9,8 @@
 #include "ReaderPlugin.h"
 #include <MediaFormats.h>
 
+#include "mpc/in_mpc.h"
+
 
 class MusePackReader : public Reader {
 	public:
@@ -34,6 +36,7 @@ class MusePackReader : public Reader {
 					media_header *mediaHeader);
 
 	private:
+		StreamInfo	fInfo;
 };
 
 #endif	/* MUSEPACK_READER_H */