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Add .TUN ACM [Descent to Undermountain (PC)]

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bnnm 2021-12-11 12:43:31 +01:00
parent 48c67ecfd8
commit e283384dcd
1 changed files with 15 additions and 13 deletions
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28
src/meta/acm.c
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@ -3,51 +3,53 @@
#include "../coding/acm_decoder_libacm.h"
/* ACM - InterPlay infinity engine games [Planescape: Torment (PC), Baldur's Gate (PC)] */
VGMSTREAM * init_vgmstream_acm(STREAMFILE *streamFile) {
VGMSTREAM* init_vgmstream_acm(STREAMFILE* sf) {
VGMSTREAM * vgmstream = NULL;
int loop_flag = 0, channel_count, sample_rate, num_samples;
int loop_flag = 0, channels, sample_rate, num_samples;
int force_channel_number = 0;
acm_codec_data *data = NULL;
/* checks */
/* .acm: plain ACM extension (often but not always paired with .mus, parsed elsewhere)
* .tun: Descent to Undermountain (PC)
* .wavc: header id for WAVC sfx (from bigfiles, extensionless) */
if (!check_extensions(streamFile, "acm,wavc"))
if (!check_extensions(sf, "acm,tun,wavc"))
goto fail;
if (read_32bitBE(0x00,streamFile) != 0x97280301 && /* header id (music) */
read_32bitBE(0x00,streamFile) != 0x57415643) /* "WAVC" (sfx) */
if (read_u32be(0x00,sf) != 0x97280301 && /* header id (music) */
!is_id32be(0x00,sf, "WAVC")) /* sfx */
goto fail;
/* Plain ACM "channels" in the header may be set to 2 for mono voices or 1 for music,
/* Plain ACM "channels" in the header (at 0x08) may be set to 2 for mono voices [FO1] or 1 for music [P:T],
* but actually seem related to ACM rows/cols and have nothing to do with channels.
*
* libacm will set plain ACM (not WAVC) to 2ch unless changes unless changed, but
* only Fallout (PC) seems to use plain ACM for sfx, others are WAVC (which do have channels).
* libacm will set plain ACM (not WAVC) to 2ch unless changed, but only Fallout (PC)
* and Descent to Undermountain (PC) seems to use plain ACM for sfx/voices,
* others are WAVC (which do have channels).
* DtU seems to use the field
*
* Doesn't look like there is any way to detect mono/stereo, so as a quick hack if
* we have a plain ACM (not WAVC) named .wavc we will force 1ch. */
if (check_extensions(streamFile, "wavc")
&& read_32bitBE(0x00,streamFile) == 0x97280301) {
if (check_extensions(sf, "wavc") && read_u32be(0x00,sf) == 0x97280301) {
force_channel_number = 1;
}
/* init decoder */
{
ACMStream *handle;
data = init_acm(streamFile, force_channel_number);
data = init_acm(sf, force_channel_number);
if (!data) goto fail;
handle = data->handle;
channel_count = handle->info.channels;
channels = handle->info.channels;
sample_rate = handle->info.rate;
num_samples = handle->total_values / handle->info.channels;
}
/* 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;