xref: /haiku/src/add-ons/media/media-add-ons/reader/MediaReaderAddOn.cpp (revision 9ed520d828d76d0d4cd81ffc9abf75f10f490dd8)

// MediaReaderAddOn.cpp
//
// Andrew Bachmann, 2002
//
// A MediaReaderAddOn is an add-on
// that can make MediaReader nodes
//
// MediaReader nodes read a file into a multistream


#include <MediaDefs.h>
#include <MediaAddOn.h>
#include <Errors.h>
#include <Node.h>
#include <Mime.h>
#include <StorageDefs.h>

#include "MediaReader.h"
#include "MediaReaderAddOn.h"

#include <limits.h>
#include <stdio.h>
#include <string.h>

// instantiation function
extern "C" _EXPORT BMediaAddOn * make_media_addon(image_id image) {
	return new MediaReaderAddOn(image);
}

// -------------------------------------------------------- //
// ctor/dtor
// -------------------------------------------------------- //

MediaReaderAddOn::~MediaReaderAddOn()
{
}

MediaReaderAddOn::MediaReaderAddOn(image_id image) :
	AbstractFileInterfaceAddOn(image)
{
	fprintf(stderr,"MediaReaderAddOn::MediaReaderAddOn\n");
}

// -------------------------------------------------------- //
// BMediaAddOn impl
// -------------------------------------------------------- //

status_t MediaReaderAddOn::GetFlavorAt(
	int32 n,
	const flavor_info ** out_info)
{
	fprintf(stderr,"MediaReaderAddOn::GetFlavorAt\n");
	if (out_info == 0) {
		fprintf(stderr,"<- B_BAD_VALUE\n");
		return B_BAD_VALUE; // we refuse to crash because you were stupid
	}
	if (n != 0) {
		fprintf(stderr,"<- B_BAD_INDEX\n");
		return B_BAD_INDEX;
	}
	flavor_info * infos = new flavor_info[1];
	MediaReader::GetFlavor(&infos[0],n);
	(*out_info) = infos;
	return B_OK;
}

BMediaNode * MediaReaderAddOn::InstantiateNodeFor(
				const flavor_info * info,
				BMessage * config,
				status_t * out_error)
{
	fprintf(stderr,"MediaReaderAddOn::InstantiateNodeFor\n");
	if (out_error == 0) {
		fprintf(stderr,"<- NULL\n");
		return 0; // we refuse to crash because you were stupid
	}
	// XXX: read from add-on's attributes
	size_t defaultChunkSize = size_t(8192); // 8192 bytes = 8 Kilobytes
	float defaultBitRate = 2048; // = 2048 kilobits/millisec = 256000 Kilobytes/sec
	MediaReader * node
		= new MediaReader(defaultChunkSize,
						  defaultBitRate,
						  info,config,this);
	if (node == 0) {
		*out_error = B_NO_MEMORY;
		fprintf(stderr,"<- B_NO_MEMORY\n");
	} else {
		*out_error = node->InitCheck();
	}
	return node;
}

status_t MediaReaderAddOn::GetConfigurationFor(
				BMediaNode * your_node,
				BMessage * into_message)
{
	fprintf(stderr,"MediaReaderAddOn::GetConfigurationFor\n");
	if (into_message == 0) {
		fprintf(stderr,"<- B_BAD_VALUE\n");
		return B_BAD_VALUE; // we refuse to crash because you were stupid
	}
	MediaReader * node
		= dynamic_cast<MediaReader*>(your_node);
	if (node == 0) {
		fprintf(stderr,"<- B_BAD_TYPE\n");
		return B_BAD_TYPE;
	}
	return node->GetConfigurationFor(into_message);
}

// -------------------------------------------------------- //
// BMediaAddOn impl for B_FILE_INTERFACE nodes
// -------------------------------------------------------- //

// This function treats null pointers slightly differently than the others.
// This is because a program could reasonably call this function with just
// about any junk, get the out_read_items or out_write_items and then use
// that to create an array of sufficient size to hold the result, and then
// call us again.  So we won't punish them if they supply us with null
// pointers the first time around.
//
// A stupid program might not supply an out_read_items, but actually supply
// an out_readable_formats and then try to do something useful with it. As
// an extreme gesture of nicety we will fill the out_readable_formats with
// a valid entry, although they could easily read into garbage after that...
status_t MediaReaderAddOn::GetFileFormatList(
				int32 flavor_id,
				media_file_format * out_writable_formats,
				int32 in_write_items,
				int32 * out_write_items,
				media_file_format * out_readable_formats,
				int32 in_read_items,
				int32 * out_read_items,
				void * _reserved)
{
	fprintf(stderr,"MediaReaderAddOn::GetFileFormatList\n");
	if (flavor_id != 0) {
		// this is a sanity check for now
		fprintf(stderr,"<- B_BAD_INDEX\n");
		return B_BAD_INDEX;
	}
	// see null check comment above
	if (out_write_items != 0) {
		*out_write_items = 0;
	}
	// see null check comment above
	if (out_read_items != 0) {
		*out_read_items = 1;
	}
	if (out_readable_formats != 0) {
		// don't go off the end
		if (in_read_items > 0) {
			MediaReader::GetFileFormat(&out_readable_formats[0]);
		}
	}
	return B_OK;
}

status_t MediaReaderAddOn::SniffTypeKind(
				const BMimeType & type,
				uint64 in_kinds,
				float * out_quality,
				int32 * out_internal_id,
				void * _reserved)
{
	fprintf(stderr,"MediaReaderAddOn::SniffTypeKind\n");
	return AbstractFileInterfaceAddOn::SniffTypeKind(type,in_kinds,
													 B_BUFFER_PRODUCER,
													 out_quality,out_internal_id,
													 _reserved);
}

// -------------------------------------------------------- //
// main
// -------------------------------------------------------- //

int main(int argc, char *argv[])
{
	fprintf(stderr,"main called for MediaReaderAddOn\n");
}

// -------------------------------------------------------- //
// stuffing
// -------------------------------------------------------- //

status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_0(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_1(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_2(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_3(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_4(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_5(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_6(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_7(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_8(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_9(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_10(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_11(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_12(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_13(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_14(void *) {};
status_t MediaReaderAddOn::_Reserved_MediaReaderAddOn_15(void *) {};