How to seek to specific frame #2
Description
I need to achieve drag to some position to play.
So, I've tried to use fseek(input, 14954847 + 429832, SEEK_SET) to jump to specific frame in basic-decoder-mfalc.c
(14954847 is the sample offset of seekpoint 60, 429832 is the metadata header length.)
and then called mfalc_sync(m).
[seekpoint 60]
sample number: 5202944
sample offset: 14954847
samples: 1024
following is the basic-decoder-mflac output
metadata block: type: 4, is_last: 0, length: 197
[vorbis_comment]
vendor string=[32]reference libFLAC 1.3.2 20170101
comment[0]=[43]ALBUM=For Your Entertainment (Tour Edition)
comment[1]=[19]ARTIST=Adam Lambert
comment[2]=[36]COMMENT=Create by taurusxin/ncmdump.
comment[3]=[26]TITLE=Whataya Want from Me
comment[4]=[13]TRACKNUMBER=3
metadata block: type: 6, is_last: 0, length: 423423
[picture]
type=3
mime string=[10]image/jpeg
description string=[0]
width=0
height=0
colordepth=0
totalcolors=0
data=[423381 bytes]
metadata block: type: 1, is_last: 1, length: 4096
decoded 8 frames
result: -3
miniflac (536 bytes):
state: MINIFLAC_FRAME
bitreader (40 bytes):
val: 0x00000000
bits: 0
crc8: 139
crc16: 31069
pos: 153
len: 16384
ogg (80 bytes):
state: MINIFLAC_OGG_CAPTUREPATTERN_O
bitreader (40 bytes):
val: 0x00000000
bits: 0
crc8: 0
crc16: 0
pos: 0
len: 0
version: 0
headertype: 0
continuation: 0
b_o_s: 0
e_o_s: 0
granulepos: 0
serialno: 0
pageno: 0
segments: 0
curseg: 0
length: 0
pos: 0
header (4 bytes):
state: MINIFLAC_OGGHEADER_PACKETTYPE
streammarker (4 bytes):
state: MINIFLAC_STREAMMARKER_F
metadata (116 bytes):
state: MINIFLAC_METADATA_HEADER
pos: 0
header (16 bytes):
is_last: 1
type_raw: 1
type: MINIFLAC_METADATA_PADDING
length: 4096
streaminfo: (16 bytes)
state: MINIFLAC_STREAMINFO_MD5_1
pos: 16
sample_rate: 44100
bps: 16
vorbis_comment (20 bytes):
state: MINIFLAC_VORBISCOMMENT_COMMENT_LENGTH
len: 13
pos: 13
tot: 5
cur: 5
picture (12 bytes):
state: MINIFLAC_PICTURE_PICTURE_DATA
len: 423381
pos: 423381
cuesheet (12 bytes):
state: MINIFLAC_CUESHEET_CATALOG
pos: 0
track: 0
tracks: 0
point: 0
points: 0
seektable (12 bytes):
state: MINIFLAC_SEEKTABLE_SAMPLE_NUMBER
len: 114
pos: 114
application (12 bytes):
state: MINIFLAC_APPLICATION_ID
len: 0
pos: 0
frame (272 bytes):
state: MINIFLAC_FRAME_FOOTER
cur_subframe: 2
crc16: 52128
frame_header (40 bytes):
state: MINIFLAC_FRAME_HEADER_SYNC
block_size_raw: 10
sample_rate_raw: 9
channel_assignment_raw: 9
blocking_strategy: 0
block_size: 1024
sample_rate: 44100
channel_assignment: MINIFLAC_CHASSGN_RIGHT_SIDE
channels: 2
bps: 16
sample_number: 9
frame_number: 9
crc8: 142
subframe (216 bytes):
state: MINIFLAC_SUBFRAME_HEADER
bps: 0
subframe_header (12 bytes):
state: MINIFLAC_SUBFRAME_HEADER_RESERVEBIT1
type: MINIFLAC_SUBFRAME_TYPE_UNKNOWN
order: 0
wasted_bits: 0
type_raw: 0
subframe_constant (4 bytes):
state: MINIFLAC_SUBFRAME_CONSTANT_DECODE
subframe_verbatim (8 bytes):
state: MINIFLAC_SUBFRAME_VERBATIM_DECODE
pos: 0
subframe_fixed (8 bytes):
state: MINIFLAC_SUBFRAME_FIXED_DECODE
pos: 0
subframe_lpc (140 bytes):
state: MINIFLAC_SUBFRAME_LPC_PRECISION
pos: 0
precision: 0
shift: 0
coefficients:
coefficients[0]: 0
coefficients[1]: 0
coefficients[2]: 0
coefficients[3]: 0
coefficients[4]: 0
coefficients[5]: 0
coefficients[6]: 0
coefficients[7]: 0
coefficients[8]: 0
coefficients[9]: 0
coefficients[10]: 0
coefficients[11]: 0
coefficients[12]: 0
coefficients[13]: 0
coefficients[14]: 0
coefficients[15]: 0
coefficients[16]: 0
coefficients[17]: 0
coefficients[18]: 0
coefficients[19]: 0
coefficients[20]: 0
coefficients[21]: 0
coefficients[22]: 0
coefficients[23]: 0
coefficients[24]: 0
coefficients[25]: 0
coefficients[26]: 0
coefficients[27]: 0
coefficients[28]: 0
coefficients[29]: 0
coefficients[30]: 0
coefficients[31]: 0
residual (36 bytes):
state: MINIFLAC_RESIDUAL_CODING_METHOD
coding_method: 0
partition_order: 0
rice_parameter: 0
rice_size: 0
msb: 0
rice_parameter_size: 0
value: 0
partition: 0
partition_total: 0
residual: 0
residual_total: 0