*/
#include <stdio.h>
+#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#define CHUNKSIZE 4096
-static int vcedit_open (vcedit_state *state);
-
struct vcedit_state_St {
int refcount;
- ogg_sync_state *oy;
- ogg_stream_state *os;
-
- vorbis_comment *vc;
- vorbis_info *vi;
+ ogg_sync_state oy;
+ ogg_stream_state os;
- char filename[PATH_MAX];
+ vorbis_comment vc;
+ vorbis_info vi;
FILE *in;
+ bool opened;
long serial;
unsigned char *mainbuf;
unsigned char *bookbuf;
int mainlen;
int booklen;
- const char *lasterror;
char *vendor;
int prevW;
int extrapage;
int eosin;
+
+ char filename[0];
};
+static void
+vcedit_state_free (vcedit_state *state)
+{
+ free (state->mainbuf);
+ free (state->bookbuf);
+ free (state->vendor);
+
+ if (state->in) {
+ fclose (state->in);
+ state->in = NULL;
+ }
+
+ free (state);
+}
+
+static bool
+vcedit_state_init (vcedit_state *state, const char *filename)
+{
+ state->refcount = 1;
+
+ strcpy (state->filename, filename);
+
+ return true;
+}
+
vcedit_state *
vcedit_state_new (const char *filename)
{
vcedit_state *state;
+ size_t len;
- state = malloc (sizeof (vcedit_state));
+ len = strlen (filename);
+ if (len > PATH_MAX)
+ return NULL;
+
+ state = malloc (sizeof (vcedit_state) + len + 1);
if (!state)
return NULL;
memset (state, 0, sizeof (vcedit_state));
- state->refcount = 1;
-
- snprintf (state->filename, sizeof (state->filename),
- "%s", filename);
-
- state->in = fopen (state->filename, "rb");
-
- if (vcedit_open (state) < 0) {
- free (state);
+ if (!vcedit_state_init (state, filename)) {
+ vcedit_state_free (state);
return NULL;
}
return state;
}
-const char *
-vcedit_error (vcedit_state *state)
-{
- return state->lasterror;
-}
-
vorbis_comment *
vcedit_comments (vcedit_state *state)
{
- return state->vc;
+ return state->opened ? &state->vc : NULL;
}
static void
vcedit_clear_internals (vcedit_state *state)
{
- if (state->vc) {
- vorbis_comment_clear (state->vc);
- free (state->vc);
- state->vc = NULL;
- }
+ ogg_stream_clear (&state->os);
+ ogg_sync_clear (&state->oy);
- if (state->os) {
- ogg_stream_clear (state->os);
- free (state->os);
- state->os = NULL;
- }
-
- if (state->oy) {
- ogg_sync_clear (state->oy);
- free (state->oy);
- state->oy = NULL;
- }
+ vorbis_info_clear (&state->vi);
+ vorbis_comment_clear (&state->vc);
free (state->vendor);
state->vendor = NULL;
state->bookbuf = NULL;
state->booklen = 0;
- if (state->vi) {
- vorbis_info_clear (state->vi);
- free (state->vi);
- state->vi = NULL;
- }
-
state->serial = 0;
+ state->opened = false;
}
void
void
vcedit_state_unref (vcedit_state *state)
{
- state->refcount--;
+ if (--state->refcount)
+ return;
- if (!state->refcount) {
- fclose (state->in);
+ if (state->opened)
vcedit_clear_internals (state);
- free (state);
- }
+
+ vcedit_state_free (state);
}
/* Next two functions pulled straight from libvorbis, apart from one change
static void
_v_writestring (oggpack_buffer *o, char *s, int len)
{
- while (len--) {
+ while (len--)
oggpack_write (o, *s++, 8);
- }
}
static int
{
int this, ret = 0;
- this = vorbis_packet_blocksize (s->vi, p);
+ this = vorbis_packet_blocksize (&s->vi, p);
if (s->prevW)
ret = (this + s->prevW) / 4;
char *buffer;
int result, bytes;
- result = ogg_stream_packetout (s->os, p);
-
- if (result > 0)
+ result = ogg_stream_packetout (&s->os, p);
+ if (result == 1)
return 1;
if (s->eosin)
return 0;
- while (ogg_sync_pageout (s->oy, page) <= 0) {
- buffer = ogg_sync_buffer (s->oy, CHUNKSIZE);
+ while (ogg_sync_pageout (&s->oy, page) != 1) {
+ buffer = ogg_sync_buffer (&s->oy, CHUNKSIZE);
bytes = fread (buffer, 1, CHUNKSIZE, s->in);
- ogg_sync_wrote (s->oy, bytes);
+ ogg_sync_wrote (&s->oy, bytes);
- if (!bytes)
+ if (!bytes && feof (s->in))
return 0;
}
return 0;
}
- ogg_stream_pagein (s->os, page);
+ ogg_stream_pagein (&s->os, page);
return _fetch_next_packet (s, p, page);
}
-static int
+vcedit_error
vcedit_open (vcedit_state *state)
{
- char *buffer;
- int bytes, i;
- int chunks = 0;
+ vcedit_error ret;
ogg_packet *header;
ogg_packet header_main, header_comments, header_codebooks;
ogg_page og;
+ char *buffer;
+ size_t bytes, total = 0;
+ int i = 0;
- state->oy = malloc (sizeof (ogg_sync_state));
- ogg_sync_init (state->oy);
-
- while (1) {
- buffer = ogg_sync_buffer (state->oy, CHUNKSIZE);
- bytes = fread (buffer, 1, CHUNKSIZE, state->in);
-
- ogg_sync_wrote (state->oy, bytes);
+ state->in = fopen (state->filename, "rb");
+ if (!state->in)
+ return VCEDIT_ERR_OPEN;
- if (ogg_sync_pageout (state->oy, &og) == 1)
- break;
+ ogg_sync_init (&state->oy);
+ do {
/* Bail if we don't find data in the first 40 kB */
- if (chunks++ >= 10) {
- if (bytes < CHUNKSIZE)
- state->lasterror = "Input truncated or empty.";
- else
- state->lasterror = "Input is not an Ogg bitstream.";
+ if (feof (state->in) || total >= (CHUNKSIZE * 10)) {
+ ogg_sync_clear (&state->oy);
- goto err;
+ return VCEDIT_ERR_INVAL;
}
- }
- state->serial = ogg_page_serialno (&og);
+ buffer = ogg_sync_buffer (&state->oy, CHUNKSIZE);
- state->os = malloc (sizeof (ogg_stream_state));
- ogg_stream_init (state->os, state->serial);
+ bytes = fread (buffer, 1, CHUNKSIZE, state->in);
+ total += bytes;
- state->vi = malloc (sizeof (vorbis_info));
- vorbis_info_init (state->vi);
+ ogg_sync_wrote (&state->oy, bytes);
+ } while (ogg_sync_pageout (&state->oy, &og) != 1);
+
+ state->serial = ogg_page_serialno (&og);
- state->vc = malloc (sizeof (vorbis_comment));
- vorbis_comment_init (state->vc);
+ ogg_stream_init (&state->os, state->serial);
+ vorbis_info_init (&state->vi);
+ vorbis_comment_init (&state->vc);
- if (ogg_stream_pagein (state->os, &og) < 0) {
- state->lasterror = "Error reading first page of Ogg bitstream.";
+ if (ogg_stream_pagein (&state->os, &og) < 0) {
+ ret = VCEDIT_ERR_INVAL;
goto err;
}
- if (ogg_stream_packetout (state->os, &header_main) != 1) {
- state->lasterror = "Error reading initial header packet.";
+ if (ogg_stream_packetout (&state->os, &header_main) != 1) {
+ ret = VCEDIT_ERR_INVAL;
goto err;
}
- if (vorbis_synthesis_headerin (state->vi, state->vc, &header_main) < 0) {
- state->lasterror = "Ogg bitstream does not contain vorbis data.";
+ if (vorbis_synthesis_headerin (&state->vi, &state->vc, &header_main) < 0) {
+ ret = VCEDIT_ERR_INVAL;
goto err;
}
state->mainbuf = malloc (state->mainlen);
memcpy (state->mainbuf, header_main.packet, header_main.bytes);
- i = 0;
header = &header_comments;
while (i < 2) {
while (i < 2) {
- int result = ogg_sync_pageout (state->oy, &og);
+ int result;
+ result = ogg_sync_pageout (&state->oy, &og);
if (!result)
break; /* Too little data so far */
- if (result == 1) {
- ogg_stream_pagein (state->os, &og);
+ if (result != 1)
+ continue;
- while (i < 2) {
- result = ogg_stream_packetout (state->os, header);
+ ogg_stream_pagein (&state->os, &og);
- if (!result)
- break;
+ while (i < 2) {
+ result = ogg_stream_packetout (&state->os, header);
+ if (!result)
+ break;
- if (result == -1) {
- state->lasterror = "Corrupt secondary header.";
- goto err;
- }
-
- vorbis_synthesis_headerin (state->vi, state->vc, header);
+ if (result != 1) {
+ ret = VCEDIT_ERR_INVAL;
+ goto err;
+ }
- if (i == 1) {
- state->booklen = header->bytes;
- state->bookbuf = malloc (state->booklen);
- memcpy (state->bookbuf, header->packet, header->bytes);
- }
+ vorbis_synthesis_headerin (&state->vi, &state->vc, header);
- i++;
- header = &header_codebooks;
+ if (i++ == 1) {
+ state->booklen = header->bytes;
+ state->bookbuf = malloc (state->booklen);
+ memcpy (state->bookbuf, header->packet, header->bytes);
}
+
+ header = &header_codebooks;
}
}
- buffer = ogg_sync_buffer (state->oy, CHUNKSIZE);
+ buffer = ogg_sync_buffer (&state->oy, CHUNKSIZE);
bytes = fread (buffer, 1, CHUNKSIZE, state->in);
- if (bytes == 0 && i < 2) {
- state->lasterror = "EOF before end of vorbis headers.";
+ if (!bytes && feof (state->in) && i < 2) {
+ ret = VCEDIT_ERR_INVAL;
goto err;
}
- ogg_sync_wrote (state->oy, bytes);
+ ogg_sync_wrote (&state->oy, bytes);
}
/* Copy the vendor tag */
- state->vendor = strdup (state->vc->vendor);
+ state->vendor = strdup (state->vc.vendor);
/* Headers are done! */
- return 0;
+ state->opened = true;
+
+ return VCEDIT_ERR_SUCCESS;
err:
vcedit_clear_internals (state);
- return -1;
+ return ret;
}
-int
+vcedit_error
vcedit_write (vcedit_state *state)
{
ogg_stream_state streamout;
int s, result, bytes, needflush = 0, needout = 0;
size_t tmp;
+ if (!state->opened)
+ return VCEDIT_ERR_INVAL;
+
strcpy (tmpfile, state->filename);
strcat (tmpfile, ".XXXXXX");
s = mkstemp (tmpfile);
- if (s == -1) {
- state->lasterror = "Error writing stream to output. "
- "Cannot open temporary file.";
- return -1;
- }
+ if (s == -1)
+ return VCEDIT_ERR_TMPFILE;
out = fdopen (s, "wb");
if (!out) {
unlink (tmpfile);
close (s);
- state->lasterror = "Error writing stream to output. "
- "Cannot open temporary file.";
- return -1;
+
+ return VCEDIT_ERR_TMPFILE;
}
state->prevW = state->extrapage = state->eosin = 0;
ogg_stream_init (&streamout, state->serial);
- _commentheader_out (state->vc, state->vendor, &header_comments);
+ _commentheader_out (&state->vc, state->vendor, &header_comments);
ogg_stream_packetin (&streamout, &header_main);
ogg_stream_packetin (&streamout, &header_comments);
/* clear it, because not all paths to here do */
state->eosin = 0;
- while (!state->eosin) { /* We reached eos, not eof */
+ do {
/* We copy the rest of the stream (other logical streams)
* through, a page at a time.
*/
- while (1) {
- result = ogg_sync_pageout (state->oy, &ogout);
+ while ((result = ogg_sync_pageout (&state->oy, &ogout))) {
+ if (result != 1)
+ continue;
- if (!result)
- break;
-
- if (result < 0)
- state->lasterror = "Corrupt or missing data, continuing...";
- else {
- /* Don't bother going through the rest, we can just
- * write the page out now
- */
- tmp = fwrite (ogout.header, 1, ogout.header_len, out);
- if (tmp != (size_t) ogout.header_len)
- goto cleanup;
+ /* Don't bother going through the rest, we can just
+ * write the page out now
+ */
+ tmp = fwrite (ogout.header, 1, ogout.header_len, out);
+ if (tmp != (size_t) ogout.header_len)
+ goto cleanup;
- tmp = fwrite (ogout.body, 1, ogout.body_len, out);
- if (tmp != (size_t) ogout.body_len)
- goto cleanup;
- }
+ tmp = fwrite (ogout.body, 1, ogout.body_len, out);
+ if (tmp != (size_t) ogout.body_len)
+ goto cleanup;
}
- buffer = ogg_sync_buffer (state->oy, CHUNKSIZE);
+ buffer = ogg_sync_buffer (&state->oy, CHUNKSIZE);
bytes = fread (buffer, 1, CHUNKSIZE, state->in);
- ogg_sync_wrote (state->oy, bytes);
+ ogg_sync_wrote (&state->oy, bytes);
- if (!bytes) {
- state->eosin = 1;
- break;
- }
- }
+ state->eosin = !bytes && feof (state->in);
+ } while (!state->eosin);
fclose (out);
fclose (state->in);
state->mainbuf = state->bookbuf = NULL;
- if (!state->eosin) {
- state->lasterror = "Error writing stream to output. "
- "Output stream may be corrupted or truncated.";
- return -1;
- }
+ if (!state->eosin)
+ return VCEDIT_ERR_INVAL;
vcedit_clear_internals (state);
- state->in = fopen (state->filename, "rb");
- vcedit_open (state);
-
- return 0;
+ return (vcedit_open (state) == VCEDIT_ERR_SUCCESS) ?
+ VCEDIT_ERR_SUCCESS : VCEDIT_ERR_REOPEN;
}
projects / ruby-vorbistagger.git / blobdiff