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/*C
(c) 2005 bl0rg.net
**/
#include "conf.h"
#include <assert.h>
#include <stdlib.h>
#include "ogg.h"
#include "buf.h"
#include "vorbis.h"
/*M
\emph{Initialize a Vorbis stream.}
**/
void vorbis_stream_init(vorbis_stream_t *vorbis) {
assert(vorbis != NULL);
ogg_page_init(&vorbis->page);
assert(vorbis->page.raw.data != NULL);
vorbis->segment = 0;
vorbis->hdr_pages_cnt = 0;
int i;
for (i = 0; i < VORBIS_MAX_HDR_PAGES; i++)
ogg_page_init(vorbis->hdr_pages + i);
buf_alloc(&vorbis->id_hdr, 1000);
assert(vorbis->id_hdr.data != NULL);
buf_alloc(&vorbis->comment_hdr, 1000);
assert(vorbis->comment_hdr.data != NULL);
buf_alloc(&vorbis->setup_hdr, 2000);
assert(vorbis->setup_hdr.data != NULL);
}
/*M
\emph{Free the structures allocated inside the Vorbis stream.}
**/
void vorbis_stream_destroy(vorbis_stream_t *vorbis) {
ogg_page_destroy(&vorbis->page);
vorbis->segment = 0;
int i;
for (i = 0; i < VORBIS_MAX_HDR_PAGES; i++)
ogg_page_destroy(vorbis->hdr_pages + i);
buf_free(&vorbis->id_hdr);
buf_free(&vorbis->comment_hdr);
buf_free(&vorbis->setup_hdr);
}
/*M
\emph{Check if the buffer contains a Vorbis header of type
\verb|type|.}
**/
int vorbis_check_packet(buf_t *buf, unsigned char type) {
assert(buf != NULL);
if (buf->len < VORBIS_HDR_SIZE)
return 0;
if (buf->data[0] != type)
return 0;
if ((buf->data[1] != VORBIS_SYNC_HDR_BYTE1) ||
(buf->data[2] != VORBIS_SYNC_HDR_BYTE2) ||
(buf->data[3] != VORBIS_SYNC_HDR_BYTE3) ||
(buf->data[4] != VORBIS_SYNC_HDR_BYTE4) ||
(buf->data[5] != VORBIS_SYNC_HDR_BYTE5) ||
(buf->data[6] != VORBIS_SYNC_HDR_BYTE6))
return 0;
return 1;
}
/*C
**/
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