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2nd try: Introduce a small api for loading code (codecs,plugins) from disk/memory.

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It's a used by codec/plugin loading and vastly reduces code duplication. It's also a step forward in getting rid of libuisimulator in the application ports.

Apparently sh needs linker symbols prefixed with _ even if they're referenced without from C code.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27902 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2010-08-27 00:29:50 +00:00
parent 97d2a6ec5c
commit 194174a371
8 changed files with 316 additions and 239 deletions
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107
apps/codecs.c
View file

@ -28,6 +28,7 @@
#include <ctype.h>
#include <stdarg.h>
#include "string-extra.h"
#include "load_code.h"
#include "debug.h"
#include "button.h"
#include "dir.h"
@ -74,26 +75,13 @@ size_t codec_size;
extern void* plugin_get_audio_buffer(size_t *buffer_size);
#if (CONFIG_PLATFORM & PLATFORM_NATIVE) && defined(HAVE_RECORDING)
#undef open
static int open(const char* pathname, int flags, ...)
{
#if (CONFIG_PLATFORM & PLATFORM_HOSTED)
int fd;
if (flags & O_CREAT)
{
va_list ap;
va_start(ap, flags);
fd = sim_open(pathname, flags, va_arg(ap, unsigned int));
va_end(ap);
}
else
fd = sim_open(pathname, flags);
return fd;
#else
return file_open(pathname, flags);
#endif
}
#endif
struct codec_api ci = {
0, /* filesize */
@ -197,62 +185,46 @@ void codec_get_full_path(char *path, const char *codec_root_fn)
CODECS_DIR, codec_root_fn);
}
static int codec_load_ram(int size, struct codec_api *api)
static int codec_load_ram(void *handle, struct codec_api *api)
{
struct codec_header *hdr;
struct codec_header *hdr = lc_get_header(handle);
int status;
#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
hdr = (struct codec_header *)codecbuf;
if (size <= (signed)sizeof(struct codec_header)
|| (hdr->magic != CODEC_MAGIC
#ifdef HAVE_RECORDING
&& hdr->magic != CODEC_ENC_MAGIC
#endif
)
|| hdr->target_id != TARGET_ID
|| hdr->load_addr != codecbuf
|| hdr->end_addr > codecbuf + CODEC_SIZE)
{
logf("codec header error");
return CODEC_ERROR;
}
codec_size = hdr->end_addr - codecbuf;
#elif (CONFIG_PLATFORM & PLATFORM_HOSTED)
void *pd;
hdr = sim_codec_load_ram(codecbuf, size, &pd);
if (pd == NULL)
return CODEC_ERROR;
if (hdr == NULL
|| (hdr->magic != CODEC_MAGIC
#ifdef HAVE_RECORDING
&& hdr->magic != CODEC_ENC_MAGIC
#endif
)
|| hdr->target_id != TARGET_ID) {
sim_codec_close(pd);
)
|| hdr->target_id != TARGET_ID
#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
|| hdr->load_addr != codecbuf
|| hdr->end_addr > codecbuf + CODEC_SIZE
#endif
)
{
logf("codec header error");
lc_close(handle);
return CODEC_ERROR;
}
codec_size = codecbuf - codecbuf;
#endif /* CONFIG_PLATFORM */
if (hdr->api_version > CODEC_API_VERSION
|| hdr->api_version < CODEC_MIN_API_VERSION) {
sim_codec_close(pd);
logf("codec api version error");
lc_close(handle);
return CODEC_ERROR;
}
#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
codec_size = hdr->end_addr - codecbuf;
#else
codec_size = 0;
#endif
*(hdr->api) = api;
cpucache_invalidate();
status = hdr->entry_point();
sim_codec_close(pd);
lc_close(handle);
return status;
}
@ -260,36 +232,37 @@ static int codec_load_ram(int size, struct codec_api *api)
int codec_load_buf(unsigned int hid, struct codec_api *api)
{
int rc;
void *handle;
rc = bufread(hid, CODEC_SIZE, codecbuf);
if (rc < 0) {
logf("error loading codec");
return CODEC_ERROR;
}
handle = lc_open_from_mem(codecbuf, rc);
if (handle == NULL)
{
logf("error loading codec");
return CODEC_ERROR;
}
api->discard_codec();
return codec_load_ram(rc, api);
return codec_load_ram(handle, api);
}
int codec_load_file(const char *plugin, struct codec_api *api)
{
char path[MAX_PATH];
int fd;
int rc;
void *handle;
codec_get_full_path(path, plugin);
fd = open(path, O_RDONLY);
if (fd < 0) {
logf("Codec load error:%d", fd);
handle = lc_open(path, codecbuf, CODEC_SIZE);
if (handle == NULL) {
logf("Codec load error");
splashf(HZ*2, "Couldn't load codec: %s", path);
return fd;
}
rc = read(fd, &codecbuf[0], CODEC_SIZE);
close(fd);
if (rc <= 0) {
logf("Codec read error");
return CODEC_ERROR;
}
return codec_load_ram((size_t)rc, api);
return codec_load_ram(handle, api);
}