#define CHUNK_SIZE 32768
static double chunk_time = 0.25;
+struct ogg_datasource {
+ char *map;
+ off_t numbytes;
+ off_t fpos;
+};
+
static size_t cb_read(void *buf, size_t size, size_t nmemb, void *datasource)
{
- FILE *f = datasource;
- return fread(buf, size, nmemb, f);
+ struct ogg_datasource *ods = datasource;
+ size_t copy = PARA_MIN(ods->numbytes - ods->fpos, size * nmemb),
+ ret = copy / size;
+ if (!ret)
+ return 0;
+ memcpy(buf, ods->map + ods->fpos, copy);
+// PARA_INFO_LOG("size: %zd, nmemb: %zd, ret: %zd\n", size, nmemb, ret);
+ ods->fpos += ret * size;
+ return ret;
}
-static int cb_seek(__a_unused void *datasource, ogg_int64_t offset,
+static int cb_seek(void *datasource, ogg_int64_t offset,
int whence)
{
- FILE *f = datasource;
- return fseek(f, offset, whence);
+ struct ogg_datasource *ods = datasource;
+ switch (whence) {
+ case SEEK_SET:
+ if (offset >= 0 && offset <= ods->numbytes) {
+ ods->fpos = offset;
+ return 0;
+ }
+ errno = EINVAL;
+ return -1;
+ break;
+ case SEEK_END:
+ if (offset <= 0 && -offset <= ods->numbytes) {
+ ods->fpos = ods->numbytes + offset;
+ return 0;
+ }
+ errno = EINVAL;
+ return -1;
+ break;
+ case SEEK_CUR:
+ if ((offset >= 0 && offset + ods->fpos > ods->numbytes) ||
+ (offset < 0 && offset + ods->fpos < 0)) {
+ errno = EINVAL;
+ return -1;
+ }
+ ods->fpos += offset;
+ return 0;
+ }
+ errno = EINVAL;
+ return -1;
}
/* don't do anything as vss still needs the open filehandle */
return 0;
}
-long cb_tell(void *datasource)
+static long cb_tell(void *datasource)
{
- FILE *f = datasource;
- return ftell(f);
+ struct ogg_datasource *ods = datasource;
+ return (unsigned long)ods->fpos;
}
-int ogg_open_callbacks(void *datasource, OggVorbis_File *vf, ov_callbacks c)
+static int ogg_open_callbacks(void *datasource, OggVorbis_File *vf, ov_callbacks c)
{
int ret = ov_open_callbacks(datasource, vf,
NULL, /* no initial buffer */
}
-static int ogg_save_header(FILE *file, struct audio_format_info *afi)
+static void ogg_save_header(char *map, struct audio_format_info *afi)
{
- int ret;
-
afi->header = para_malloc(afi->header_len);
- rewind(file);
- ret = read(fileno(file), afi->header, afi->header_len);
- if (ret == afi->header_len)
- return 1;
- free(afi->header);
- return -E_OGG_READ;
+ memcpy(afi->header, map, afi->header_len);
}
-static int ogg_compute_header_len(FILE *file, struct audio_format_info *afi)
+static int ogg_compute_header_len(char *map, off_t numbytes,
+ struct audio_format_info *afi)
{
- int ret, len, in = fileno(file);
+ int ret, len = PARA_MIN(numbytes, CHUNK_SIZE);
unsigned int serial;
char *buf;
ogg_page page;
ogg_sync_init(sync_in);
vorbis_info_init(&vi);
vorbis_comment_init(&vc);
- buf = ogg_sync_buffer(sync_in, CHUNK_SIZE);
- len = read(in, buf, CHUNK_SIZE);
- ret = -E_OGG_READ;
- if (len <= 0)
- goto err1;
+ buf = ogg_sync_buffer(sync_in, len);
+ memcpy(buf, map, len);
ogg_sync_wrote(sync_in, len);
ret = -E_SYNC_PAGEOUT;
if (ogg_sync_pageout(sync_in, &page) <= 0)
while (ogg_stream_flush(stream_out, &page))
afi->header_len += page.body_len + page.header_len;
PARA_INFO_LOG("header_len = %d\n", afi->header_len);
- ret = ogg_save_header(file, afi);
+ ogg_save_header(map, afi);
+ ret = 1;
err2:
ogg_stream_destroy(stream_in);
ogg_stream_destroy(stream_out);
max_chunk_len = PARA_MAX(max_chunk_len, diff);
min = (i == 1)? diff : PARA_MIN(min, diff);
afi->chunk_table[i] = pos;
- if (i < 11 || !((i - 1) % 1000)|| i > num - 11)
- PARA_DEBUG_LOG("chunk #%d: %g secs, pos: %zd, "
- "size: %zd\n", i - 1,
- i * chunk_time, pos, pos - old_pos);
+// if (i < 11 || !((i - 1) % 1000)|| i > num - 11)
+// PARA_DEBUG_LOG("chunk #%d: %g secs, pos: %zd, "
+// "size: %zd\n", i - 1,
+// i * chunk_time, pos, pos - old_pos);
old_pos = pos;
}
num_chunks = i - 1;
/*
* Init oggvorbis file and write some tech data to given pointers.
*/
-static int ogg_get_file_info(FILE *file, struct audio_format_info *afi)
+static int ogg_get_file_info(char *map, off_t numbytes,
+ struct audio_format_info *afi)
{
int ret;
double time_total;
ogg_int64_t raw_total;
long vi_sampling_rate, vi_bitrate;
OggVorbis_File of;
- static const ov_callbacks ovc = {
+ const ov_callbacks ovc = {
.read_func = cb_read,
.seek_func = cb_seek,
.close_func = cb_close,
.tell_func = cb_tell
};
+ struct ogg_datasource ods = {.map = map, .numbytes = numbytes, .fpos = 0};
- if (!file)
- return -E_OGG_NO_FILE;
- ret = ogg_compute_header_len(file, afi);
+ ret = ogg_compute_header_len(map, numbytes, afi);
if (ret < 0)
return ret;
- rewind(file);
- ret = ogg_open_callbacks(file, &of, ovc);
+ ret = ogg_open_callbacks(&ods, &of, ovc);
if (ret < 0)
goto err;
ret = -E_OGG_INFO;
afi->seconds_total = time_total;
vi_sampling_rate = vi->rate;
vi_bitrate = ov_bitrate(&of, 0);
- rewind(file);
afi->chunks_total = ogg_compute_chunk_table(&of, afi, time_total);
- rewind(file);
sprintf(afi->info_string, "audio_file_info1:%lu x %lu, %ldkHz, "
"%d channels, %ldkbps\n"
"audio_file_info2: \n"
afi->chunks_total, (long unsigned) (chunk_time * 1000 * 1000),
vi_sampling_rate / 1000, vi->channels, vi_bitrate / 1000
);
- rewind(file);
afi->chunk_tv.tv_sec = 0;
afi->chunk_tv.tv_usec = 250 * 1000;
tv_scale(3, &afi->chunk_tv, &afi->eof_tv);