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Fix .vxn encoder delay / gapless [Asphalt 9 (Android)]

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This commit is contained in:
bnnm 2021-05-31 22:24:00 +02:00
parent 4bb3d2f2dc
commit b01b420a91
1 changed files with 28 additions and 9 deletions
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37
src/meta/vxn.c
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@ -1,10 +1,11 @@
#include "meta.h"
#include "../coding/coding.h"
/* VXN - from Gameloft mobile games */
VGMSTREAM* init_vgmstream_vxn(STREAMFILE* sf) {
VGMSTREAM* vgmstream = NULL;
int loop_flag = 0, channel_count, codec, sample_rate, block_align, bits, num_samples;
int loop_flag = 0, channels, codec, sample_rate, block_align, bits, num_samples, encoder_delay;
off_t start_offset, stream_offset, chunk_offset, first_offset = 0x00;
size_t stream_size;
int total_subsongs, target_subsong = sf->stream_index;
@ -13,22 +14,32 @@ VGMSTREAM* init_vgmstream_vxn(STREAMFILE* sf) {
if (!check_extensions(sf,"vxn"))
goto fail;
if (read_u32be(0x00,sf) != 0x566F784E) /* "VoxN" */
if (!is_id32be(0x00,sf, "VoxN"))
goto fail;
/* 0x04: chunk size */
/* 0x08: ASCII version? ("0.0.1") */
if (read_u32le(0x10,sf) != get_streamfile_size(sf))
goto fail;
/* 0x14: first MPC data start */
/* header is RIFF-like with many custom chunks */
if (!find_chunk_le(sf, 0x41666D74,first_offset,0, &chunk_offset,NULL)) /* "Afmt" */
goto fail;
codec = read_u16le(chunk_offset+0x00, sf);
channel_count = read_u16le(chunk_offset+0x02, sf);
channels = read_u16le(chunk_offset+0x02, sf);
sample_rate = read_u32le(chunk_offset+0x04, sf);
block_align = read_u16le(chunk_offset+0x08, sf);
bits = read_16bitLE(chunk_offset+0x0a, sf);
bits = read_s16le(chunk_offset+0x0a, sf);
/* files are divided into segment subsongs, often a leadout and loop in that order
* (the "Plst" and "Rule" chunks may have order info) */
/* files are divided into segment subsongs, often a leadout and loop in that order,
* but may also have +15 [Asphalt 9]. Various chunks seem to define how they are used:
* - Rule: optional, not related to number of playlists
* - Plst: sets N playlists + some flags?
* - Stat: N entries (1 per playlist), start? + name (null-terminated, size 0x0C) + sample values?
* - Trsn: optional, transitions for playlists?
* - Grps: N entries (1 per playlist), 0x18 per entry, unknown
* - Gprs: playlist segments, 0x20 per entry, playlist id + segment + null + segment? + flags (0/1/-1)
*/
if (!find_chunk_le(sf, 0x5365676D,first_offset,0, &chunk_offset,NULL)) /* "Segm" */
goto fail;
total_subsongs = read_u32le(chunk_offset+0x00, sf);
@ -45,7 +56,7 @@ VGMSTREAM* init_vgmstream_vxn(STREAMFILE* sf) {
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,loop_flag);
vgmstream = allocate_vgmstream(channels, loop_flag);
if (!vgmstream) goto fail;
vgmstream->sample_rate = sample_rate;
@ -85,16 +96,24 @@ VGMSTREAM* init_vgmstream_vxn(STREAMFILE* sf) {
break;
#ifdef VGM_USE_FFMPEG
case 0x0800: /* Musepack (ex. Asphalt Xtreme) */
case 0x0800: /* Musepack (ex. Asphalt Xtreme, Asphalt 9) */
if (bits != -1) goto fail;
vgmstream->codec_data = init_ffmpeg_offset(sf, start_offset,stream_size);
vgmstream->codec_data = init_ffmpeg_offset(sf, start_offset, stream_size);
if (!vgmstream->codec_data) goto fail;
vgmstream->coding_type = coding_FFmpeg;
vgmstream->layout_type = layout_none;
/* unlike standard .mpc, .vxn has no seek table so no need to fix */
//ffmpeg_set_force_seek(vgmstream->codec_data);
encoder_delay = 0;
mpc_get_samples(sf, start_offset, NULL, &encoder_delay);
/* num_samples matches MPC samples */
/* FFmpeg doesn't set encoder delay */
ffmpeg_set_skip_samples(vgmstream->codec_data, encoder_delay);
break;
#endif