track_t *track_from_path(const char *path)
{
AVFormatContext *avctx = NULL;
track_t *track;
if (avformat_open_input(&avctx, path, NULL, NULL)) {
return NULL;
}
if (!is_valid_audio_file(avctx)) {
return NULL;
}
track = track_create(path, avctx, -1);
avformat_close_input(&avctx);
return track;
}
static bool cdi_parse_track(FILE *f, const char *fn, uint32_t version,
uint8_t track, uint8_t session, uint32_t *offs)
{
static const uint8_t mark[10] = { 0, 0, 1, 0, 0, 0, ~0, ~0, ~0, ~0 };
uint8_t buf[89];
int i;
if (fread(buf, 1, 4, f) != 4) {
msg_perror(fn);
return false;
}
if (get_le32(buf) != 0 &&
fseek(f, 8, SEEK_CUR) < 0) {
msg_perror(fn);
return false;
}
if (fread(buf, 1, 25, f) != 25) {
msg_perror(fn);
return false;
}
if (memcmp(buf, mark, 10) || memcmp(buf+10, mark, 10)) {
msg_error("Track start mark not identified\n");
return false;
}
if (buf[24] > 0 &&
fseek(f, buf[24], SEEK_CUR) < 0) {
msg_perror(fn);
return false;
}
if (fread(buf, 1, 23, f) != 23) {
msg_perror(fn);
return false;
}
if (get_le32(buf+19) == 0x80000000UL &&
fseek(f, 8, SEEK_CUR) < 0) {
msg_perror(fn);
return false;
}
if (fread(buf, 1, 89, f) != 89) {
msg_perror(fn);
return false;
}
struct track *t = track_create();
if (!t)
return false;
t->track_nr = track;
t->session_nr = session - 1;
t->track_ctl = buf[60];
t->start_sector = get_le32(buf+32)+150;
uint32_t pregap = get_le32(buf+2);
uint32_t length = get_le32(buf+6);
uint32_t tot_length = get_le32(buf+36);
uint32_t secsize;
switch (buf[56]) {
case 0: secsize = 2048; break;
case 1: secsize = 2336; break;
case 2: secsize = 2352; break;
default:
msg_error("Unknown sector size encountered\n");
return false;
}
enum track_type type;
switch (buf[16]) {
case 0:
if (secsize != 2352) {
msg_error("Invalid sector size for audio track\n");
return false;
}
type = TRACK_RAW_2352;
break;
case 1:
if (secsize != 2048) {
msg_error("Invalid sector size for mode 1 track\n");
return false;
}
type = TRACK_MODE_1_2048;
break;
case 2:
if (secsize == 2336)
type = TRACK_MODE_2_2336;
else if (secsize == 2048)
type = TRACK_XA_FORM_1_2048;
else {
msg_error("Invalid sector size for mode 2 track\n");
return false;
}
break;
default:
msg_error("Invalid track mode\n");
return false;
}
if (!track_data_from_file(t, type, secsize, f,
*offs + pregap * secsize,
length))
return false;
*offs += tot_length * secsize;
if (version != CDI_VERSION_2) {
if (fread(buf, 1, 9, f) != 9) {
msg_perror(fn);
return false;
}
if (get_le32(buf+5) == (uint32_t)(~0UL) &&
fseek(f, 78, SEEK_CUR) < 0) {
msg_perror(fn);
return false;
}
}
return true;
}
