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Extend lc_open() to also being able to load overlay plugins.

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For this it needs to look at the plugin header. Since lc_open() doesn't know
it's a plugin, the header needs to be changed slightly to include the new lc_header (which needs to be the first element in plugin_header so it can be casted savely).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28054 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2010-09-09 16:17:21 +00:00
parent cec7c99613
commit 0d4585b28f
10 changed files with 167 additions and 105 deletions
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23
apps/codecs.h
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@ -51,6 +51,7 @@
#include "settings.h"
#include "gcc_extensions.h"
#include "load_code.h"
#ifdef CODEC
#if defined(DEBUG) || defined(SIMULATOR)
@ -240,11 +241,7 @@ struct codec_api {
/* codec header */
struct codec_header {
unsigned long magic; /* RCOD or RENC */
unsigned short target_id;
unsigned short api_version;
unsigned char *load_addr;
unsigned char *end_addr;
struct lc_header lc_hdr; /* must be first */
enum codec_status(*entry_point)(void);
struct codec_api **api;
};
@ -261,27 +258,27 @@ extern unsigned char plugin_end_addr[];
#define CODEC_HEADER \
const struct codec_header __header \
__attribute__ ((section (".header")))= { \
CODEC_MAGIC, TARGET_ID, CODEC_API_VERSION, \
plugin_start_addr, plugin_end_addr, codec_start, &ci };
{ CODEC_MAGIC, TARGET_ID, CODEC_API_VERSION, \
plugin_start_addr, plugin_end_addr }, codec_start, &ci };
/* encoders */
#define CODEC_ENC_HEADER \
const struct codec_header __header \
__attribute__ ((section (".header")))= { \
CODEC_ENC_MAGIC, TARGET_ID, CODEC_API_VERSION, \
plugin_start_addr, plugin_end_addr, codec_start, &ci };
{ CODEC_ENC_MAGIC, TARGET_ID, CODEC_API_VERSION, \
plugin_start_addr, plugin_end_addr }, codec_start, &ci };
#else /* def SIMULATOR */
/* decoders */
#define CODEC_HEADER \
const struct codec_header __header \
__attribute__((visibility("default"))) = { \
CODEC_MAGIC, TARGET_ID, CODEC_API_VERSION, \
NULL, NULL, codec_start, &ci };
{ CODEC_MAGIC, TARGET_ID, CODEC_API_VERSION, NULL, NULL }, \
codec_start, &ci };
/* encoders */
#define CODEC_ENC_HEADER \
const struct codec_header __header = { \
CODEC_ENC_MAGIC, TARGET_ID, CODEC_API_VERSION, \
NULL, NULL, codec_start, &ci };
{ CODEC_ENC_MAGIC, TARGET_ID, CODEC_API_VERSION, NULL, NULL }, \
codec_start, &ci };
#endif /* SIMULATOR */
#endif /* CODEC */