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Add M2 looping .m4a [G-Darius HD (Switch)]

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This commit is contained in:
bnnm 2021-10-02 18:15:45 +02:00
parent 011aa6c6c1
commit 29547af5be
1 changed files with 22 additions and 8 deletions
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30
src/meta/mp4.c
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@ -25,16 +25,16 @@ VGMSTREAM* init_vgmstream_mp4_aac_ffmpeg(STREAMFILE* sf) {
/* checks */
/* .bin: Final Fantasy Dimensions (iOS), Final Fantasy V (iOS)
* .msd: UNO (iOS) */
if (!check_extensions(sf,"mp4,m4a,m4v,lmp4,bin,lbin,msd"))
goto fail;
if ((read_u32be(0x00,sf) & 0xFFFFFF00) != 0) /* first atom BE size (usually ~0x18) */
goto fail;
if (!is_id32be(0x04,sf, "ftyp"))
goto fail;
/* .bin: Final Fantasy Dimensions (iOS), Final Fantasy V (iOS)
* .msd: UNO (iOS) */
if (!check_extensions(sf,"mp4,m4a,m4v,lmp4,bin,lbin,msd"))
goto fail;
file_size = get_streamfile_size(sf);
ffmpeg_data = init_ffmpeg_offset(sf, start_offset, file_size);
@ -86,7 +86,7 @@ fail:
/* read useful MP4 chunks */
static void parse_mp4(STREAMFILE* sf, mp4_header* mp4) {
off_t offset, suboffset, max_offset, max_suboffset;
uint32_t offset, suboffset, max_offset, max_suboffset;
/* MOV format chunks, called "atoms", size goes first because Apple */
@ -117,12 +117,25 @@ static void parse_mp4(STREAMFILE* sf, mp4_header* mp4) {
mp4->loop_start = read_u32be(offset + 0x08 + 0x2c,sf);
mp4->loop_end = read_u32be(offset + 0x08 + 0x30,sf);
}
/* could stop reading since FFmpeg will too */
max_offset = 0;
}
/* M2 emu's .m4a (codename zoom) */
else if (is_id32be(offset + 0x08 + 0x00,sf, "ZOOM")) {
/* 0x00: id */
mp4->encoder_delay = read_s32be(offset + 0x08 + 0x04,sf); /* Apple's 2112, also in iTunes tag */
/* 0x08: end padding */
mp4->num_samples = read_s32be(offset + 0x08 + 0x0c,sf);
mp4->loop_start = read_s32be(offset + 0x08 + 0x10,sf);
mp4->loop_end = read_s32be(offset + 0x08 + 0x14,sf);
mp4->loop_flag = (mp4->loop_end != 0);
if (mp4->loop_flag)
mp4->loop_end++; /* assumed, matches num_samples this way */
max_offset = 0;
}
break;
case 0x6D6F6F76: { /* "moov" (header) */
suboffset = offset += 0x08;
suboffset = offset + 0x08;
max_suboffset = offset + size;
while (suboffset < max_suboffset) {
uint32_t subsize = read_u32be(suboffset + 0x00,sf);
@ -145,6 +158,7 @@ static void parse_mp4(STREAMFILE* sf, mp4_header* mp4) {
mp4->num_samples = read_s32be(criw_offset + 0x0c,sf);
mp4->loop_flag = (mp4->loop_end > 0);
/* next 2 fields are null */
max_offset = 0;
}
break;