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/*C
(c) 2005 bl0rg.net
**/
#include "conf.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "pack.h"
#include "file.h"
#include "ogg.h"
#include "crc32.h"
int ogg_fill_page_hdr(ogg_page_t *page) {
assert(page != NULL);
unsigned long size = OGG_HDR_MIN_SIZE + page->page_segments;
int i;
for (i = 0; i < page->page_segments; i++)
size += page->lacing_values[i];
if (page->raw.size < size)
if (!buf_grow(&page->raw))
return 0;
unsigned char *ptr = page->raw.data;
UINT8_PACK(ptr, OGG_SYNC_HDR_BYTE1);
UINT8_PACK(ptr, OGG_SYNC_HDR_BYTE2);
UINT8_PACK(ptr, OGG_SYNC_HDR_BYTE3);
UINT8_PACK(ptr, OGG_SYNC_HDR_BYTE4);
UINT8_PACK(ptr, 0);
unsigned char flags = 0;
if (page->b.continuation)
flags |= 1;
if (page->b.first)
flags |= 2;
if (page->b.last)
flags |= 4;
UINT8_PACK(ptr, flags);
memcpy(ptr, page->position, 8);
ptr += 8;
LE_UINT32_PACK(ptr, page->stream);
LE_UINT32_PACK(ptr, page->page_no);
LE_UINT32_PACK(ptr, 0);
UINT8_PACK(ptr, page->page_segments);
for (i = 0; i < page->page_segments; i++)
UINT8_PACK(ptr, page->lacing_values[i]);
return 1;
}
void ogg_fill_page_cksum(ogg_page_t *page) {
assert(page != NULL);
assert(page->raw.data != NULL);
unsigned long cksum = crc32(&ogg_crc32, page->raw.data, page->size);
unsigned char *ptr = page->raw.data + 22;
LE_UINT32_PACK(ptr, cksum);
}
int ogg_write_page(file_t *ogg, ogg_page_t *page) {
assert(ogg != NULL);
assert(page != NULL);
assert(page->raw.data != NULL);
assert(page->size <= page->raw.size);
if (file_write(ogg, page->raw.data, page->size) <= 0)
return EEOF;
return 1;
}
/*C
**/
#ifdef OGG_WRITETEST
#include <stdio.h>
#include <string.h>
int main(int argc, char *argv[]) {
char *f[2];
if (!(f[0] = *++argv) ||
!(f[1] = *++argv)) {
fprintf(stderr, "Usage: oggtest mp3in mp3out\n");
return 1;
}
file_t in;
if (!file_open_read(&in, f[0])) {
fprintf(stderr, "Could not open ogg file for read: %s\n", f[0]);
return 1;
}
file_t out;
if (!file_open_write(&out, f[1])) {
fprintf(stderr, "Could not open ogg file for write: %s\n", f[1]);
file_close(&in);
return 1;
}
ogg_page_t page;
ogg_init();
ogg_page_init(&page);
while (ogg_next_page(&in, &page) > 0) {
memset(page.raw.data, 0, OGG_HDR_MIN_SIZE);
if (!ogg_fill_page_hdr(&page)) {
ogg_page_destroy(&page);
file_close(&in);
file_close(&out);
return 1;
}
ogg_fill_page_cksum(&page);
if (ogg_write_page(&out, &page) <= 0) {
fprintf(stderr, "Could not write page\n");
ogg_page_destroy(&page);
file_close(&in);
file_close(&out);
return 1;
}
fgetc(stdin);
}
ogg_page_destroy(&page);
file_close(&in);
file_close(&out);
return 0;
}
#endif /* OGG_WRITETEST */
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