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vgmstream/src/meta/txtp.c
bnnm f5a9e5d06a Add TXTP silence entry
2020-08-15 20:04:50 +02:00

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#include "meta.h"
#include "../coding/coding.h"
#include "../layout/layout.h"
#include "../mixing.h"
#include "../plugins.h"
#define TXTP_LINE_MAX 1024
#define TXTP_MIXING_MAX 512
#define TXTP_GROUP_MODE_SEGMENTED 'S'
#define TXTP_GROUP_MODE_LAYERED 'L'
#define TXTP_GROUP_MODE_RANDOM 'R'
#define TXTP_GROUP_REPEAT 'R'
#define TXTP_POSITION_LOOPS 'L'
/* mixing info */
typedef enum {
MIX_SWAP,
MIX_ADD,
MIX_ADD_VOLUME,
MIX_VOLUME,
MIX_LIMIT,
MIX_DOWNMIX,
MIX_KILLMIX,
MIX_UPMIX,
MIX_FADE,
MACRO_VOLUME,
MACRO_TRACK,
MACRO_LAYER,
MACRO_CROSSTRACK,
MACRO_CROSSLAYER,
MACRO_DOWNMIX,
} txtp_mix_t;
typedef struct {
txtp_mix_t command;
/* common */
int ch_dst;
int ch_src;
double vol;
/* fade envelope */
double vol_start;
double vol_end;
char shape;
int32_t sample_pre;
int32_t sample_start;
int32_t sample_end;
int32_t sample_post;
double time_pre;
double time_start;
double time_end;
double time_post;
double position;
char position_type;
/* macros */
int max;
uint32_t mask;
char mode;
} txtp_mix_data;
typedef struct {
/* main entry */
char filename[TXTP_LINE_MAX];
int silent;
/* TXTP settings (applied at the end) */
int range_start;
int range_end;
int subsong;
uint32_t channel_mask;
int mixing_count;
txtp_mix_data mixing[TXTP_MIXING_MAX];
play_config_t config;
int sample_rate;
int loop_install_set;
int loop_end_max;
double loop_start_second;
int32_t loop_start_sample;
double loop_end_second;
int32_t loop_end_sample;
int trim_set;
double trim_second;
int32_t trim_sample;
} txtp_entry;
typedef struct {
int position;
char type;
int count;
char repeat;
int selected;
txtp_entry group_settings;
} txtp_group;
typedef struct {
txtp_entry* entry;
size_t entry_count;
size_t entry_max;
txtp_group* group;
size_t group_count;
size_t group_max;
int group_pos; /* entry counter for groups */
VGMSTREAM** vgmstream;
size_t vgmstream_count;
uint32_t loop_start_segment;
uint32_t loop_end_segment;
int is_loop_keep;
int is_loop_auto;
txtp_entry default_entry;
int default_entry_set;
int is_segmented;
int is_layered;
int is_single;
} txtp_header;
static txtp_header* parse_txtp(STREAMFILE* sf);
static int parse_entries(txtp_header* txtp, STREAMFILE* sf);
static int parse_groups(txtp_header* txtp);
static void clean_txtp(txtp_header* txtp, int fail);
static void apply_settings(VGMSTREAM* vgmstream, txtp_entry* current);
void add_mixing(txtp_entry* cfg, txtp_mix_data* mix, txtp_mix_t command);
/* TXTP - an artificial playlist-like format to play files with segments/layers/config */
VGMSTREAM* init_vgmstream_txtp(STREAMFILE* sf) {
VGMSTREAM* vgmstream = NULL;
txtp_header* txtp = NULL;
int ok;
/* checks */
if (!check_extensions(sf, "txtp"))
goto fail;
/* read .txtp with all files and settings */
txtp = parse_txtp(sf);
if (!txtp) goto fail;
/* process files in the .txtp */
ok = parse_entries(txtp, sf);
if (!ok) goto fail;
/* group files into layouts */
ok = parse_groups(txtp);
if (!ok) goto fail;
/* may happen if using mixed mode but some files weren't grouped */
if (txtp->vgmstream_count != 1) {
VGM_LOG("TXTP: wrong final vgmstream count %i\n", txtp->vgmstream_count);
goto fail;
}
/* should result in a final, single vgmstream possibly containing multiple vgmstreams */
vgmstream = txtp->vgmstream[0];
clean_txtp(txtp, 0);
return vgmstream;
fail:
clean_txtp(txtp, 1);
return NULL;
}
static void clean_txtp(txtp_header* txtp, int fail) {
int i, start;
if (!txtp)
return;
/* returns first vgmstream on success so it's not closed */
start = fail ? 0 : 1;
for (i = start; i < txtp->vgmstream_count; i++) {
close_vgmstream(txtp->vgmstream[i]);
}
free(txtp->vgmstream);
free(txtp->group);
free(txtp->entry);
free(txtp);
}
//todo fragment parser later
/*******************************************************************************/
/* ENTRIES */
/*******************************************************************************/
static int parse_silents(txtp_header* txtp) {
int i;
int channels = 0;
int sample_rate = 0;
int32_t num_samples = 0;
/* silents use same channels as close files */
for (i = 0; i < txtp->vgmstream_count; i++) {
if (!txtp->entry[i].silent) {
channels = txtp->vgmstream[i]->channels;
sample_rate = txtp->vgmstream[i]->sample_rate;
break;
}
}
/* actually open silents */
for (i = 0; i < txtp->vgmstream_count; i++) {
if (!txtp->entry[i].silent)
continue;
txtp->vgmstream[i] = init_vgmstream_silence(channels, sample_rate, num_samples);
if (!txtp->vgmstream[i]) goto fail;
apply_settings(txtp->vgmstream[i], &txtp->entry[i]);
}
return 1;
fail:
return 0;
}
static int is_silent(txtp_entry* entry) {
/* should also contain "." in the filename for commands with seconds ("1.0") to work */
return entry->filename[0] == '?';
}
/* open all entries and apply settings to resulting VGMSTREAMs */
static int parse_entries(txtp_header* txtp, STREAMFILE* sf) {
int i;
int has_silents = 0;
if (txtp->entry_count == 0)
goto fail;
txtp->vgmstream = calloc(txtp->entry_count, sizeof(VGMSTREAM*));
if (!txtp->vgmstream) goto fail;
txtp->vgmstream_count = txtp->entry_count;
/* open all entry files first as they'll be modified by modes */
for (i = 0; i < txtp->vgmstream_count; i++) {
STREAMFILE* temp_sf = NULL;
/* silent entry ignore */
if (is_silent(&txtp->entry[i])) {
txtp->entry[i].silent = 1;
has_silents = 1;
continue;
}
temp_sf = open_streamfile_by_filename(sf, txtp->entry[i].filename);
if (!temp_sf) {
VGM_LOG("TXTP: cannot open streamfile for %s\n", txtp->entry[i].filename);
goto fail;
}
temp_sf->stream_index = txtp->entry[i].subsong;
txtp->vgmstream[i] = init_vgmstream_from_STREAMFILE(temp_sf);
close_streamfile(temp_sf);
if (!txtp->vgmstream[i]) {
VGM_LOG("TXTP: cannot open vgmstream for %s#%i\n", txtp->entry[i].filename, txtp->entry[i].subsong);
goto fail;
}
apply_settings(txtp->vgmstream[i], &txtp->entry[i]);
}
if (has_silents) {
if (!parse_silents(txtp))
goto fail;
}
return 1;
fail:
return 0;
}
/*******************************************************************************/
/* GROUPS */
/*******************************************************************************/
static void update_vgmstream_list(VGMSTREAM* vgmstream, txtp_header* txtp, int position, int count) {
int i;
//;VGM_LOG("TXTP: compact position=%i count=%i, vgmstreams=%i\n", position, count, txtp->vgmstream_count);
/* sets and compacts vgmstream list pulling back all following entries */
txtp->vgmstream[position] = vgmstream;
for (i = position + count; i < txtp->vgmstream_count; i++) {
//;VGM_LOG("TXTP: copy %i to %i\n", i, i + 1 - count);
txtp->vgmstream[i + 1 - count] = txtp->vgmstream[i];
}
/* list can only become smaller, no need to alloc/free/etc */
txtp->vgmstream_count = txtp->vgmstream_count + 1 - count;
//;VGM_LOG("TXTP: compact vgmstreams=%i\n", txtp->vgmstream_count);
}
static int make_group_segment(txtp_header* txtp, int is_group, int position, int count) {
VGMSTREAM* vgmstream = NULL;
segmented_layout_data *data_s = NULL;
int i, loop_flag = 0;
/* allowed for actual groups (not final "mode"), otherwise skip to optimize */
if (!is_group && count == 1) {
//;VGM_LOG("TXTP: ignored single group\n");
return 1;
}
if (position + count > txtp->vgmstream_count || position < 0 || count < 0) {
VGM_LOG("TXTP: ignored segment position=%i, count=%i, entries=%i\n", position, count, txtp->vgmstream_count);
return 1;
}
/* loop settings only make sense if this group becomes final vgmstream */
if (position == 0 && txtp->vgmstream_count == count) {
if (txtp->loop_start_segment && !txtp->loop_end_segment) {
txtp->loop_end_segment = count;
}
else if (txtp->is_loop_auto) { /* auto set to last segment */
txtp->loop_start_segment = count;
txtp->loop_end_segment = count;
}
loop_flag = (txtp->loop_start_segment > 0 && txtp->loop_start_segment <= count);
}
/* init layout */
data_s = init_layout_segmented(count);
if (!data_s) goto fail;
/* copy each subfile */
for (i = 0; i < count; i++) {
data_s->segments[i] = txtp->vgmstream[i + position];
txtp->vgmstream[i + position] = NULL; /* will be freed by layout */
}
/* setup VGMSTREAMs */
if (!setup_layout_segmented(data_s))
goto fail;
/* build the layout VGMSTREAM */
vgmstream = allocate_segmented_vgmstream(data_s,loop_flag, txtp->loop_start_segment - 1, txtp->loop_end_segment - 1);
if (!vgmstream) goto fail;
/* custom meta name if all parts don't match */
for (i = 0; i < count; i++) {
if (vgmstream->meta_type != data_s->segments[i]->meta_type) {
vgmstream->meta_type = meta_TXTP;
break;
}
}
/* fix loop keep */
if (loop_flag && txtp->is_loop_keep) {
int32_t current_samples = 0;
for (i = 0; i < count; i++) {
if (txtp->loop_start_segment == i+1 /*&& data_s->segments[i]->loop_start_sample*/) {
vgmstream->loop_start_sample = current_samples + data_s->segments[i]->loop_start_sample;
}
current_samples += data_s->segments[i]->num_samples;
if (txtp->loop_end_segment == i+1 && data_s->segments[i]->loop_end_sample) {
vgmstream->loop_end_sample = current_samples - data_s->segments[i]->num_samples + data_s->segments[i]->loop_end_sample;
}
}
}
/* set new vgmstream and reorder positions */
update_vgmstream_list(vgmstream, txtp, position, count);
return 1;
fail:
close_vgmstream(vgmstream);
if (!vgmstream)
free_layout_segmented(data_s);
return 0;
}
static int make_group_layer(txtp_header* txtp, int is_group, int position, int count) {
VGMSTREAM* vgmstream = NULL;
layered_layout_data* data_l = NULL;
int i;
/* allowed for actual groups (not final mode), otherwise skip to optimize */
if (!is_group && count == 1) {
//;VGM_LOG("TXTP: ignored single group\n");
return 1;
}
if (position + count > txtp->vgmstream_count || position < 0 || count < 0) {
VGM_LOG("TXTP: ignored layer position=%i, count=%i, entries=%i\n", position, count, txtp->vgmstream_count);
return 1;
}
/* init layout */
data_l = init_layout_layered(count);
if (!data_l) goto fail;
/* copy each subfile */
for (i = 0; i < count; i++) {
data_l->layers[i] = txtp->vgmstream[i + position];
txtp->vgmstream[i + position] = NULL; /* will be freed by layout */
}
/* setup VGMSTREAMs */
if (!setup_layout_layered(data_l))
goto fail;
/* build the layout VGMSTREAM */
vgmstream = allocate_layered_vgmstream(data_l);
if (!vgmstream) goto fail;
/* custom meta name if all parts don't match */
for (i = 0; i < count; i++) {
if (vgmstream->meta_type != data_l->layers[i]->meta_type) {
vgmstream->meta_type = meta_TXTP;
break;
}
}
/* loop settings only make sense if this group becomes final vgmstream */
if (position == 0 && txtp->vgmstream_count == count) {
if (txtp->is_loop_auto && !vgmstream->loop_flag) {
vgmstream_force_loop(vgmstream, 1, 0, vgmstream->num_samples);
}
}
/* set new vgmstream and reorder positions */
update_vgmstream_list(vgmstream, txtp, position, count);
return 1;
fail:
close_vgmstream(vgmstream);
if (!vgmstream)
free_layout_layered(data_l);
return 0;
}
static int make_group_random(txtp_header* txtp, int is_group, int position, int count, int selected) {
VGMSTREAM* vgmstream = NULL;
int i;
/* allowed for actual groups (not final mode), otherwise skip to optimize */
if (!is_group && count == 1) {
//;VGM_LOG("TXTP: ignored single group\n");
return 1;
}
if (position + count > txtp->vgmstream_count || position < 0 || count < 0) {
VGM_LOG("TXTP: ignored random position=%i, count=%i, entries=%i\n", position, count, txtp->vgmstream_count);
return 1;
}
/* 0=actually random for fun and testing, but undocumented since random music is kinda weird, may change anytime
* (plus foobar caches song duration so it can get strange if randoms are too different) */
if (selected < 0) {
static int random_seed = 0;
srand((unsigned)txtp + random_seed++); /* whatevs */
selected = (rand() % count); /* 0..count-1 */
//;VGM_LOG("TXTP: autoselected random %i\n", selected);
}
if (selected < 0 || selected >= count) {
goto fail;
}
/* get selected and remove non-selected */
vgmstream = txtp->vgmstream[position + selected];
txtp->vgmstream[position + selected] = NULL;
for (i = 0; i < count; i++) {
close_vgmstream(txtp->vgmstream[i + position]);
}
/* set new vgmstream and reorder positions */
update_vgmstream_list(vgmstream, txtp, position, count);
return 1;
fail:
close_vgmstream(vgmstream);
return 0;
}
static int parse_groups(txtp_header* txtp) {
int i;
/* detect single files before grouping */
if (txtp->group_count == 0 && txtp->vgmstream_count == 1) {
txtp->is_single = 1;
txtp->is_segmented = 0;
txtp->is_layered = 0;
}
/* group files as needed */
for (i = 0; i < txtp->group_count; i++) {
txtp_group *grp = &txtp->group[i];
int pos, groups;
//;VGM_LOG("TXTP: apply group %i%c%i%c\n",txtp->group[i].position,txtp->group[i].type,txtp->group[i].count,txtp->group[i].repeat);
/* special meaning of "all files" */
if (grp->position < 0 || grp->position >= txtp->vgmstream_count)
grp->position = 0;
if (grp->count <= 0)
grp->count = txtp->vgmstream_count - grp->position;
/* repeats N groups (trailing files are not grouped) */
if (grp->repeat == TXTP_GROUP_REPEAT) {
groups = ((txtp->vgmstream_count - grp->position) / grp->count);
}
else {
groups = 1;
}
/* as groups are compacted position goes 1 by 1 */
for (pos = grp->position; pos < grp->position + groups; pos++) {
//;VGM_LOG("TXTP: group=%i, count=%i, groups=%i\n", pos, grp->count, groups);
switch(grp->type) {
case TXTP_GROUP_MODE_LAYERED:
if (!make_group_layer(txtp, 1, pos, grp->count))
goto fail;
break;
case TXTP_GROUP_MODE_SEGMENTED:
if (!make_group_segment(txtp, 1, pos, grp->count))
goto fail;
break;
case TXTP_GROUP_MODE_RANDOM:
if (!make_group_random(txtp, 1, pos, grp->count, grp->selected))
goto fail;
break;
default:
goto fail;
}
}
/* group may also have settings (like downmixing) */
apply_settings(txtp->vgmstream[grp->position], &grp->group_settings);
}
/* final tweaks (should be integrated with the above?) */
if (txtp->is_layered) {
if (!make_group_layer(txtp, 0, 0, txtp->vgmstream_count))
goto fail;
}
if (txtp->is_segmented) {
if (!make_group_segment(txtp, 0, 0, txtp->vgmstream_count))
goto fail;
}
if (txtp->is_single) {
/* special case of setting start_segment to force/overwrite looping
* (better to use #E but left for compatibility with older TXTPs) */
if (txtp->loop_start_segment == 1 && !txtp->loop_end_segment) {
vgmstream_force_loop(txtp->vgmstream[0], 1, txtp->vgmstream[0]->loop_start_sample, txtp->vgmstream[0]->num_samples);
}
}
/* apply default settings to the resulting file */
if (txtp->default_entry_set) {
apply_settings(txtp->vgmstream[0], &txtp->default_entry);
}
return 1;
fail:
return 0;
}
/*******************************************************************************/
/* CONFIG */
/*******************************************************************************/
static void copy_flag(int* dst_flag, int* src_flag) {
if (!*src_flag)
return;
*dst_flag = 1;
}
static void copy_secs(int* dst_flag, double* dst_secs, int* src_flag, double* src_secs) {
if (!*src_flag)
return;
*dst_flag = 1;
*dst_secs = *src_secs;
}
static void copy_time(int* dst_flag, int32_t* dst_time, double* dst_time_s, int* src_flag, int32_t* src_time, double* src_time_s) {
if (!*src_flag)
return;
*dst_flag = 1;
*dst_time = *src_time;
*dst_time_s = *src_time_s;
}
static void copy_config(play_config_t* dst, play_config_t* src) {
if (!src->config_set)
return;
dst->config_set = 1;
copy_flag(&dst->play_forever, &src->play_forever);
copy_flag(&dst->ignore_fade, &src->ignore_fade);
copy_flag(&dst->force_loop, &src->force_loop);
copy_flag(&dst->really_force_loop, &src->really_force_loop);
copy_flag(&dst->ignore_loop, &src->ignore_loop);
copy_secs(&dst->loop_count_set, &dst->loop_count, &src->loop_count_set, &src->loop_count);
copy_secs(&dst->fade_time_set, &dst->fade_time, &src->fade_time_set, &src->fade_time);
copy_secs(&dst->fade_delay_set, &dst->fade_delay, &src->fade_delay_set, &src->fade_delay);
copy_time(&dst->pad_begin_set, &dst->pad_begin, &dst->pad_begin_s, &src->pad_begin_set, &src->pad_begin, &src->pad_begin_s);
copy_time(&dst->pad_end_set, &dst->pad_end, &dst->pad_end_s, &src->pad_end_set, &src->pad_end, &src->pad_end_s);
copy_time(&dst->trim_begin_set, &dst->trim_begin, &dst->trim_begin_s, &src->trim_begin_set, &src->trim_begin, &src->trim_begin_s);
copy_time(&dst->trim_end_set, &dst->trim_end, &dst->trim_end_s, &src->trim_end_set, &src->trim_end, &src->trim_end_s);
copy_time(&dst->body_time_set, &dst->body_time, &dst->body_time_s, &src->body_time_set, &src->body_time, &src->body_time_s);
}
#if 0
static void init_config(VGMSTREAM* vgmstream) {
play_config_t* cfg = &vgmstream->config;
//todo only on segmented/layered?
if (cfg->play_forever
cfg->loop_count_set || cfg->fade_time_set || cfg->fade_delay_set ||
cfg->pad_begin_set || cfg->pad_end_set || cfg->trim_begin_set || cfg->trim_end_set ||
cfg->body_time_set) {
VGM_LOG("setup!\n");
}
}
#endif
static void apply_settings(VGMSTREAM* vgmstream, txtp_entry* current) {
/* base settings */
if (current->sample_rate > 0) {
vgmstream->sample_rate = current->sample_rate;
}
if (current->loop_install_set) {
if (current->loop_start_second > 0 || current->loop_end_second > 0) {
current->loop_start_sample = current->loop_start_second * vgmstream->sample_rate;
current->loop_end_sample = current->loop_end_second * vgmstream->sample_rate;
if (current->loop_end_sample > vgmstream->num_samples &&
current->loop_end_sample - vgmstream->num_samples <= 0.1 * vgmstream->sample_rate)
current->loop_end_sample = vgmstream->num_samples; /* allow some rounding leeway */
}
if (current->loop_end_max) {
current->loop_end_sample = vgmstream->num_samples;
}
vgmstream_force_loop(vgmstream, current->loop_install_set, current->loop_start_sample, current->loop_end_sample);
}
if (current->trim_set) {
if (current->trim_second != 0.0) {
/* trim sample can become 0 here when second is too small (rounded) */
current->trim_sample = (double)current->trim_second * (double)vgmstream->sample_rate;
}
if (current->trim_sample < 0) {
vgmstream->num_samples += current->trim_sample; /* trim from end (add negative) */
}
else if (current->trim_sample > 0 && vgmstream->num_samples > current->trim_sample) {
vgmstream->num_samples = current->trim_sample; /* trim to value >0 */
}
/* readjust after triming if it went over (could check for more edge cases but eh) */
if (vgmstream->loop_end_sample > vgmstream->num_samples)
vgmstream->loop_end_sample = vgmstream->num_samples;
}
/* add macro to mixing list */
if (current->channel_mask) {
int ch;
for (ch = 0; ch < vgmstream->channels; ch++) {
if (!((current->channel_mask >> ch) & 1)) {
txtp_mix_data mix = {0};
mix.ch_dst = ch + 1;
mix.vol = 0.0f;
add_mixing(current, &mix, MIX_VOLUME);
}
}
}
/* copy mixing list (should be done last as some mixes depend on config) */
if (current->mixing_count > 0) {
int m, position_samples;
for (m = 0; m < current->mixing_count; m++) {
txtp_mix_data *mix = &current->mixing[m];
switch(mix->command) {
/* base mixes */
case MIX_SWAP: mixing_push_swap(vgmstream, mix->ch_dst, mix->ch_src); break;
case MIX_ADD: mixing_push_add(vgmstream, mix->ch_dst, mix->ch_src, 1.0); break;
case MIX_ADD_VOLUME: mixing_push_add(vgmstream, mix->ch_dst, mix->ch_src, mix->vol); break;
case MIX_VOLUME: mixing_push_volume(vgmstream, mix->ch_dst, mix->vol); break;
case MIX_LIMIT: mixing_push_limit(vgmstream, mix->ch_dst, mix->vol); break;
case MIX_UPMIX: mixing_push_upmix(vgmstream, mix->ch_dst); break;
case MIX_DOWNMIX: mixing_push_downmix(vgmstream, mix->ch_dst); break;
case MIX_KILLMIX: mixing_push_killmix(vgmstream, mix->ch_dst); break;
case MIX_FADE:
/* Convert from time to samples now that sample rate is final.
* Samples and time values may be mixed though, so it's done for every
* value (if one is 0 the other will be too, though) */
if (mix->time_pre > 0.0) mix->sample_pre = mix->time_pre * vgmstream->sample_rate;
if (mix->time_start > 0.0) mix->sample_start = mix->time_start * vgmstream->sample_rate;
if (mix->time_end > 0.0) mix->sample_end = mix->time_end * vgmstream->sample_rate;
if (mix->time_post > 0.0) mix->sample_post = mix->time_post * vgmstream->sample_rate;
/* convert special meaning too */
if (mix->time_pre < 0.0) mix->sample_pre = -1;
if (mix->time_post < 0.0) mix->sample_post = -1;
if (mix->position_type == TXTP_POSITION_LOOPS && vgmstream->loop_flag) {
int loop_pre = vgmstream->loop_start_sample;
int loop_samples = (vgmstream->loop_end_sample - vgmstream->loop_start_sample);
position_samples = loop_pre + loop_samples * mix->position;
if (mix->sample_pre >= 0) mix->sample_pre += position_samples;
mix->sample_start += position_samples;
mix->sample_end += position_samples;
if (mix->sample_post >= 0) mix->sample_post += position_samples;
}
mixing_push_fade(vgmstream, mix->ch_dst, mix->vol_start, mix->vol_end, mix->shape,
mix->sample_pre, mix->sample_start, mix->sample_end, mix->sample_post);
break;
/* macro mixes */
case MACRO_VOLUME: mixing_macro_volume(vgmstream, mix->vol, mix->mask); break;
case MACRO_TRACK: mixing_macro_track(vgmstream, mix->mask); break;
case MACRO_LAYER: mixing_macro_layer(vgmstream, mix->max, mix->mask, mix->mode); break;
case MACRO_CROSSTRACK: mixing_macro_crosstrack(vgmstream, mix->max); break;
case MACRO_CROSSLAYER: mixing_macro_crosslayer(vgmstream, mix->max, mix->mode); break;
case MACRO_DOWNMIX: mixing_macro_downmix(vgmstream, mix->max); break;
default:
break;
}
}
}
/* default play config (last after sample rate mods/mixing/etc) */
copy_config(&vgmstream->config, &current->config);
setup_state_vgmstream(vgmstream);
/* config is enabled in layouts or externally (for compatibility, since we don't know yet if this
* VGMSTREAM will part of a layout, or is enabled externally to not mess up plugins's calcs) */
}
/*******************************************************************************/
/* PARSER - HELPERS */
/*******************************************************************************/
/* sscanf 101: "matches = sscanf(string-from, string-commands, parameters...)"
* - reads linearly and matches "%" commands to input parameters as found
* - reads until string end (NULL) or not being able to match current parameter
* - returns number of matched % parameters until stop, or -1 if no matches and reached string end
* - must supply pointer param for every "%" in the string
* - %d/f: match number until end or *non-number* (so "%d" reads "5t" as "5")
* - %s: reads string (dangerous due to overflows and surprising as %s%d can't match numbers since string eats all chars)
* - %[^(chars)] match string with chars not in the list (stop reading at those chars)
* - %*(command) read but don't match (no need to supply parameterr)
* - " ": ignore all spaces until next non-space
* - other chars in string must exist: ("%dt t%dt" reads "5t t5t" as "5" and "5", while "t5t 5t" matches only first "5")
* - %n: special match (not counted in return value), chars consumed until that point (can appear and be set multiple times)
*/
static int get_double(const char* params, double *value, int *is_set) {
int n, m;
double temp;
if (is_set) *is_set = 0;
m = sscanf(params, " %lf%n", &temp,&n);
if (m != 1 || temp < 0)
return 0;
if (is_set) *is_set = 1;
*value = temp;
return n;
}
static int get_int(const char* params, int *value) {
int n,m;
int temp;
m = sscanf(params, " %d%n", &temp,&n);
if (m != 1 || temp < 0)
return 0;
*value = temp;
return n;
}
static int get_position(const char* params, double* value_f, char* value_type) {
int n,m;
double temp_f;
char temp_c;
/* test if format is position: N.n(type) */
m = sscanf(params, " %lf%c%n", &temp_f,&temp_c,&n);
if (m != 2 || temp_f < 0.0)
return 0;
/* test accepted chars as it will capture anything */
if (temp_c != TXTP_POSITION_LOOPS)
return 0;
*value_f = temp_f;
*value_type = temp_c;
return n;
}
static int get_time(const char* params, double* value_f, int32_t* value_i) {
int n,m;
int temp_i1, temp_i2;
double temp_f1, temp_f2;
char temp_c;
/* test if format is hour: N:N(.n) or N_N(.n) */
m = sscanf(params, " %d%c%d%n", &temp_i1,&temp_c,&temp_i2,&n);
if (m == 3 && (temp_c == ':' || temp_c == '_')) {
m = sscanf(params, " %lf%c%lf%n", &temp_f1,&temp_c,&temp_f2,&n);
if (m != 3 || /*temp_f1 < 0.0 ||*/ temp_f1 >= 60.0 || temp_f2 < 0.0 || temp_f2 >= 60.0)
return 0;
*value_f = temp_f1 * 60.0 + temp_f2;
return n;
}
/* test if format is seconds: N.n */
m = sscanf(params, " %d.%d%n", &temp_i1,&temp_i2,&n);
if (m == 2) {
m = sscanf(params, " %lf%n", &temp_f1,&n);
if (m != 1 /*|| temp_f1 < 0.0*/)
return 0;
*value_f = temp_f1;
return n;
}
/* test is format is hex samples: 0xN */
m = sscanf(params, " 0x%x%n", &temp_i1,&n);
if (m == 1) {
/* allow negative samples for special meanings */
//if (temp_i1 < 0)
// return 0;
*value_i = temp_i1;
return n;
}
/* assume format is samples: N */
m = sscanf(params, " %d%n", &temp_i1,&n);
if (m == 1) {
/* allow negative samples for special meanings */
//if (temp_i1 < 0)
// return 0;
*value_i = temp_i1;
return n;
}
return 0;
}
static int get_time_f(const char* params, double* value_f, int32_t* value_i, int* flag) {
int n = get_time(params, value_f, value_i);
if (n > 0)
*flag = 1;
return n;
}
static int get_bool(const char* params, int* value) {
int n,m;
char temp;
n = 0; /* init as it's not matched if c isn't */
m = sscanf(params, " %c%n", &temp, &n);
if (m >= 1 && !(temp == '#' || temp == '\r' || temp == '\n'))
return 0; /* ignore if anything non-space/comment matched */
if (m >= 1 && temp == '#')
n--; /* don't consume separator when returning totals */
*value = 1;
return n;
}
static int get_mask(const char* params, uint32_t* value) {
int n, m, total_n = 0;
int temp1,temp2, r1, r2;
int i;
char cmd;
uint32_t mask = *value;
while (params[0] != '\0') {
m = sscanf(params, " %c%n", &cmd,&n); /* consume comma */
if (m == 1 && (cmd == ',' || cmd == '-')) { /* '-' is alt separator (space is ok too, implicitly) */
params += n;
continue;
}
m = sscanf(params, " %d%n ~ %d%n", &temp1,&n, &temp2,&n);
if (m == 1) { /* single values */
r1 = temp1 - 1;
r2 = temp1 - 1;
}
else if (m == 2) { /* range */
r1 = temp1 - 1;
r2 = temp2 - 1;
}
else { /* no more matches */
break;
}
if (n == 0 || r1 < 0 || r1 > 31 || r2 < 0 || r2 > 31)
break;
for (i = r1; i < r2 + 1; i++) {
mask |= (1 << i);
}
params += n;
total_n += n;
if (params[0]== ',' || params[0]== '-')
params++;
}
*value = mask;
return total_n;
}
static int get_fade(const char* params, txtp_mix_data* mix, int* p_n) {
int n, m, tn = 0;
char type, separator;
m = sscanf(params, " %d %c%n", &mix->ch_dst, &type, &n);
if (m != 2 || n == 0) goto fail;
params += n;
tn += n;
if (type == '^') {
/* full definition */
m = sscanf(params, " %lf ~ %lf = %c @%n", &mix->vol_start, &mix->vol_end, &mix->shape, &n);
if (m != 3 || n == 0) goto fail;
params += n;
tn += n;
n = get_time(params, &mix->time_pre, &mix->sample_pre);
if (n == 0) goto fail;
params += n;
tn += n;
m = sscanf(params, " %c%n", &separator, &n);
if ( m != 1 || n == 0 || separator != '~') goto fail;
params += n;
tn += n;
n = get_time(params, &mix->time_start, &mix->sample_start);
if (n == 0) goto fail;
params += n;
tn += n;
m = sscanf(params, " %c%n", &separator, &n);
if (m != 1 || n == 0 || separator != '+') goto fail;
params += n;
tn += n;
n = get_time(params, &mix->time_end, &mix->sample_end);
if (n == 0) goto fail;
params += n;
tn += n;
m = sscanf(params, " %c%n", &separator, &n);
if (m != 1 || n == 0 || separator != '~') goto fail;
params += n;
tn += n;
n = get_time(params, &mix->time_post, &mix->sample_post);
if (n == 0) goto fail;
params += n;
tn += n;
}
else {
/* simplified definition */
if (type == '{' || type == '(') {
mix->vol_start = 0.0;
mix->vol_end = 1.0;
}
else if (type == '}' || type == ')') {
mix->vol_start = 1.0;
mix->vol_end = 0.0;
}
else {
goto fail;
}
mix->shape = type; /* internally converted */
mix->time_pre = -1.0;
mix->sample_pre = -1;
n = get_position(params, &mix->position, &mix->position_type);
//if (n == 0) goto fail; /* optional */
params += n;
tn += n;
n = get_time(params, &mix->time_start, &mix->sample_start);
if (n == 0) goto fail;
params += n;
tn += n;
m = sscanf(params, " %c%n", &separator, &n);
if (m != 1 || n == 0 || separator != '+') goto fail;
params += n;
tn += n;
n = get_time(params, &mix->time_end, &mix->sample_end);
if (n == 0) goto fail;
params += n;
tn += n;
mix->time_post = -1.0;
mix->sample_post = -1;
}
mix->time_end = mix->time_start + mix->time_end; /* defined as length */
*p_n = tn;
return 1;
fail:
return 0;
}
/*******************************************************************************/
/* PARSER - MAIN */
/*******************************************************************************/
void add_mixing(txtp_entry* entry, txtp_mix_data* mix, txtp_mix_t command) {
if (entry->mixing_count + 1 > TXTP_MIXING_MAX) {
VGM_LOG("TXTP: too many mixes\n");
return;
}
/* parser reads ch1 = first, but for mixing code ch0 = first
* (if parser reads ch0 here it'll become -1 with meaning of "all channels" in mixing code) */
mix->ch_dst--;
mix->ch_src--;
mix->command = command;
entry->mixing[entry->mixing_count] = *mix; /* memcpy'ed */
entry->mixing_count++;
}
static void add_settings(txtp_entry* current, txtp_entry* entry, const char* filename) {
/* don't memcopy to allow list additions and ignore values not set, as current can be "default" settings */
//*current = *cfg;
if (filename)
strcpy(current->filename, filename);
/* play config */
copy_config(&current->config, &entry->config);
/* file settings */
if (entry->subsong)
current->subsong = entry->subsong;
if (entry->sample_rate > 0)
current->sample_rate = entry->sample_rate;
if (entry->channel_mask)
current->channel_mask = entry->channel_mask;
if (entry->loop_install_set) {
current->loop_install_set = entry->loop_install_set;
current->loop_end_max = entry->loop_end_max;
current->loop_start_sample = entry->loop_start_sample;
current->loop_start_second = entry->loop_start_second;
current->loop_end_sample = entry->loop_end_sample;
current->loop_end_second = entry->loop_end_second;
}
if (entry->trim_set) {
current->trim_set = entry->trim_set;
current->trim_second = entry->trim_second;
current->trim_sample = entry->trim_sample;
}
if (entry->mixing_count > 0) {
int i;
for (i = 0; i < entry->mixing_count; i++) {
current->mixing[current->mixing_count] = entry->mixing[i];
current->mixing_count++;
}
}
}
static void parse_params(txtp_entry* entry, char* params) {
/* parse params: #(commands) */
int n, nc, nm, mc;
char command[TXTP_LINE_MAX] = {0};
play_config_t* tcfg = &entry->config;
entry->range_start = 0;
entry->range_end = 1;
while (params != NULL) {
/* position in next #(command) */
params = strchr(params, '#');
if (!params) break;
//;VGM_LOG("TXTP: params='%s'\n", params);
/* get command until next space/number/comment/end */
command[0] = '\0';
mc = sscanf(params, "#%n%[^ #0-9\r\n]%n", &nc, command, &nc);
//;VGM_LOG("TXTP: command='%s', nc=%i, mc=%i\n", command, nc, mc);
if (mc <= 0 && nc == 0) break;
params[0] = '\0'; //todo don't modify input string and properly calculate filename end
params += nc; /* skip '#' and command */
/* check command string (though at the moment we only use single letters) */
if (strcmp(command,"c") == 0) {
/* channel mask: file.ext#c1,2 = play channels 1,2 and mutes rest */
params += get_mask(params, &entry->channel_mask);
//;VGM_LOG("TXTP: channel_mask ");{int i; for (i=0;i<16;i++)VGM_LOG("%i ",(entry->channel_mask>>i)&1);}VGM_LOG("\n");
}
else if (strcmp(command,"m") == 0) {
/* channel mixing: file.ext#m(sub-command),(sub-command),etc */
char cmd;
while (params[0] != '\0') {
txtp_mix_data mix = {0};
//;VGM_LOG("TXTP: subcommand='%s'\n", params);
//todo use strchr instead?
if (sscanf(params, " %c%n", &cmd, &n) == 1 && n != 0 && cmd == ',') {
params += n;
continue;
}
if (sscanf(params, " %d - %d%n", &mix.ch_dst, &mix.ch_src, &n) == 2 && n != 0) {
//;VGM_LOG("TXTP: mix %i-%i\n", mix.ch_dst, mix.ch_src);
add_mixing(entry, &mix, MIX_SWAP); /* N-M: swaps M with N */
params += n;
continue;
}
if ((sscanf(params, " %d + %d * %lf%n", &mix.ch_dst, &mix.ch_src, &mix.vol, &n) == 3 && n != 0) ||
(sscanf(params, " %d + %d x %lf%n", &mix.ch_dst, &mix.ch_src, &mix.vol, &n) == 3 && n != 0)) {
//;VGM_LOG("TXTP: mix %i+%i*%f\n", mix.ch_dst, mix.ch_src, mix.vol);
add_mixing(entry, &mix, MIX_ADD_VOLUME); /* N+M*V: mixes M*volume to N */
params += n;
continue;
}
if (sscanf(params, " %d + %d%n", &mix.ch_dst, &mix.ch_src, &n) == 2 && n != 0) {
//;VGM_LOG("TXTP: mix %i+%i\n", mix.ch_dst, mix.ch_src);
add_mixing(entry, &mix, MIX_ADD); /* N+M: mixes M to N */
params += n;
continue;
}
if ((sscanf(params, " %d * %lf%n", &mix.ch_dst, &mix.vol, &n) == 2 && n != 0) ||
(sscanf(params, " %d x %lf%n", &mix.ch_dst, &mix.vol, &n) == 2 && n != 0)) {
//;VGM_LOG("TXTP: mix %i*%f\n", mix.ch_dst, mix.vol);
add_mixing(entry, &mix, MIX_VOLUME); /* N*V: changes volume of N */
params += n;
continue;
}
if ((sscanf(params, " %d = %lf%n", &mix.ch_dst, &mix.vol, &n) == 2 && n != 0)) {
//;VGM_LOG("TXTP: mix %i=%f\n", mix.ch_dst, mix.vol);
add_mixing(entry, &mix, MIX_LIMIT); /* N=V: limits volume of N */
params += n;
continue;
}
if (sscanf(params, " %d%c%n", &mix.ch_dst, &cmd, &n) == 2 && n != 0 && cmd == 'D') {
//;VGM_LOG("TXTP: mix %iD\n", mix.ch_dst);
add_mixing(entry, &mix, MIX_KILLMIX); /* ND: downmix N and all following channels */
params += n;
continue;
}
if (sscanf(params, " %d%c%n", &mix.ch_dst, &cmd, &n) == 2 && n != 0 && cmd == 'd') {
//;VGM_LOG("TXTP: mix %id\n", mix.ch_dst);
add_mixing(entry, &mix, MIX_DOWNMIX);/* Nd: downmix N only */
params += n;
continue;
}
if (sscanf(params, " %d%c%n", &mix.ch_dst, &cmd, &n) == 2 && n != 0 && cmd == 'u') {
//;VGM_LOG("TXTP: mix %iu\n", mix.ch_dst);
add_mixing(entry, &mix, MIX_UPMIX); /* Nu: upmix N */
params += n;
continue;
}
if (get_fade(params, &mix, &n) != 0) {
//;VGM_LOG("TXTP: fade %d^%f~%f=%c@%f~%f+%f~%f\n",
// mix.ch_dst, mix.vol_start, mix.vol_end, mix.shape,
// mix.time_pre, mix.time_start, mix.time_end, mix.time_post);
add_mixing(entry, &mix, MIX_FADE); /* N^V1~V2@T1~T2+T3~T4: fades volumes between positions */
params += n;
continue;
}
break; /* unknown mix/new command/end */
}
}
else if (strcmp(command,"s") == 0 || (nc == 1 && params[0] >= '0' && params[0] <= '9')) {
/* subsongs: file.ext#s2 = play subsong 2, file.ext#2~10 = play subsong range */
int subsong_start = 0, subsong_end = 0;
//todo also advance params?
if (sscanf(params, " %d ~ %d", &subsong_start, &subsong_end) == 2) {
if (subsong_start > 0 && subsong_end > 0) {
entry->range_start = subsong_start-1;
entry->range_end = subsong_end;
}
//;VGM_LOG("TXTP: subsong range %i~%i\n", range_start, range_end);
}
else if (sscanf(params, " %d", &subsong_start) == 1) {
if (subsong_start > 0) {
entry->range_start = subsong_start-1;
entry->range_end = subsong_start;
}
//;VGM_LOG("TXTP: subsong single %i-%i\n", range_start, range_end);
}
else { /* wrong setting, ignore */
//;VGM_LOG("TXTP: subsong none\n");
}
}
/* play config */
else if (strcmp(command,"i") == 0) {
params += get_bool(params, &tcfg->ignore_loop);
tcfg->config_set = 1;
}
else if (strcmp(command,"e") == 0) {
params += get_bool(params, &tcfg->force_loop);
tcfg->config_set = 1;
}
else if (strcmp(command,"E") == 0) {
params += get_bool(params, &tcfg->really_force_loop);
tcfg->config_set = 1;
}
else if (strcmp(command,"F") == 0) {
params += get_bool(params, &tcfg->ignore_fade);
tcfg->config_set = 1;
}
else if (strcmp(command,"L") == 0) {
params += get_bool(params, &tcfg->play_forever);
tcfg->config_set = 1;
}
else if (strcmp(command,"l") == 0) {
params += get_double(params, &tcfg->loop_count, &tcfg->loop_count_set);
if (tcfg->loop_count < 0)
tcfg->loop_count_set = 0;
tcfg->config_set = 1;
}
else if (strcmp(command,"f") == 0) {
params += get_double(params, &tcfg->fade_time, &tcfg->fade_time_set);
if (tcfg->fade_time < 0)
tcfg->fade_time_set = 0;
tcfg->config_set = 1;
}
else if (strcmp(command,"d") == 0) {
params += get_double(params, &tcfg->fade_delay, &tcfg->fade_delay_set);
if (tcfg->fade_delay < 0)
tcfg->fade_delay_set = 0;
tcfg->config_set = 1;
}
else if (strcmp(command,"p") == 0) {
params += get_time_f(params, &tcfg->pad_begin_s, &tcfg->pad_begin, &tcfg->pad_begin_set);
tcfg->config_set = 1;
}
else if (strcmp(command,"P") == 0) {
params += get_time_f(params, &tcfg->pad_end_s, &tcfg->pad_end, &tcfg->pad_end_set);
tcfg->config_set = 1;
}
else if (strcmp(command,"r") == 0) {
params += get_time_f(params, &tcfg->trim_begin_s, &tcfg->trim_begin, &tcfg->trim_begin_set);
tcfg->config_set = 1;
}
else if (strcmp(command,"R") == 0) {
params += get_time_f(params, &tcfg->trim_end_s, &tcfg->trim_end, &tcfg->trim_end_set);
tcfg->config_set = 1;
}
else if (strcmp(command,"b") == 0) {
params += get_time_f(params, &tcfg->body_time_s, &tcfg->body_time, &tcfg->body_time_set);
tcfg->config_set = 1;
}
/* other settings */
else if (strcmp(command,"h") == 0) {
params += get_int(params, &entry->sample_rate);
//;VGM_LOG("TXTP: sample_rate %i\n", cfg->sample_rate);
}
else if (strcmp(command,"I") == 0) {
n = get_time(params, &entry->loop_start_second, &entry->loop_start_sample);
if (n > 0) { /* first value must exist */
params += n;
n = get_time(params, &entry->loop_end_second, &entry->loop_end_sample);
if (n == 0) { /* second value is optional */
entry->loop_end_max = 1;
}
params += n;
entry->loop_install_set = 1;
}
//;VGM_LOG("TXTP: loop_install %i (max=%i): %i %i / %f %f\n", entry->loop_install, entry->loop_end_max,
// entry->loop_start_sample, entry->loop_end_sample, entry->loop_start_second, entry->loop_end_second);
}
else if (strcmp(command,"t") == 0) {
entry->trim_set = get_time(params, &entry->trim_second, &entry->trim_sample);
//;VGM_LOG("TXTP: trim %i - %f / %i\n", entry->trim_set, entry->trim_second, entry->trim_sample);
}
//todo cleanup
/* macros */
else if (strcmp(command,"@volume") == 0) {
txtp_mix_data mix = {0};
nm = get_double(params, &mix.vol, NULL);
params += nm;
if (nm == 0) continue;
nm = get_mask(params, &mix.mask);
params += nm;
add_mixing(entry, &mix, MACRO_VOLUME);
}
else if (strcmp(command,"@track") == 0 ||
strcmp(command,"C") == 0 ) {
txtp_mix_data mix = {0};
nm = get_mask(params, &mix.mask);
params += nm;
if (nm == 0) continue;
add_mixing(entry, &mix, MACRO_TRACK);
}
else if (strcmp(command,"@layer-v") == 0 ||
strcmp(command,"@layer-b") == 0 ||
strcmp(command,"@layer-e") == 0) {
txtp_mix_data mix = {0};
nm = get_int(params, &mix.max);
params += nm;
if (nm > 0) { /* max is optional (auto-detects and uses max channels) */
nm = get_mask(params, &mix.mask);
params += nm;
}
mix.mode = command[7]; /* pass letter */
add_mixing(entry, &mix, MACRO_LAYER);
}
else if (strcmp(command,"@crosslayer-v") == 0 ||
strcmp(command,"@crosslayer-b") == 0 ||
strcmp(command,"@crosslayer-e") == 0 ||
strcmp(command,"@crosstrack") == 0) {
txtp_mix_data mix = {0};
txtp_mix_t type;
if (strcmp(command,"@crosstrack") == 0) {
type = MACRO_CROSSTRACK;
}
else {
type = MACRO_CROSSLAYER;
mix.mode = command[12]; /* pass letter */
}
nm = get_int(params, &mix.max);
params += nm;
if (nm == 0) continue;
add_mixing(entry, &mix, type);
}
else if (strcmp(command,"@downmix") == 0) {
txtp_mix_data mix = {0};
mix.max = 2; /* stereo only for now */
//nm = get_int(params, &mix.max);
//params += nm;
//if (nm == 0) continue;
add_mixing(entry, &mix, MACRO_DOWNMIX);
}
else if (params[nc] == ' ') {
//;VGM_LOG("TXTP: comment\n");
break; /* comment, ignore rest */
}
else {
//;VGM_LOG("TXTP: unknown command\n");
/* end, incorrect command, or possibly a comment or double ## comment too
* (shouldn't fail for forward compatibility) */
break;
}
}
}
static int add_group(txtp_header* txtp, char* line) {
int n, m;
txtp_group cfg = {0};
int auto_pos = 0;
char c;
/* parse group: (position)(type)(count)(repeat) #(commands) */
//;VGM_LOG("TXTP: parse group '%s'\n", line);
m = sscanf(line, " %c%n", &c, &n);
if (m == 1 && c == '-') {
auto_pos = 1;
line += n;
}
m = sscanf(line, " %d%n", &cfg.position, &n);
if (m == 1) {
cfg.position--; /* externally 1=first but internally 0=first */
line += n;
}
m = sscanf(line, " %c%n", &cfg.type, &n);
if (m == 1) {
line += n;
}
m = sscanf(line, " %d%n", &cfg.count, &n);
if (m == 1) {
line += n;
}
m = sscanf(line, " %c%n", &cfg.repeat, &n);
if (m == 1 && cfg.repeat == TXTP_GROUP_REPEAT) {
auto_pos = 0;
line += n;
}
m = sscanf(line, " >%d%n", &cfg.selected, &n);
if (m == 1) {
cfg.selected--; /* externally 1=first but internally 0=first */
line += n;
}
parse_params(&cfg.group_settings, line);
/* Groups can use "auto" position of last N files, so we need a counter that changes like this:
* #layer of 2 (pos = 0)
* #sequence of 2
* bgm pos +1 > 1
* bgm pos +1 > 2
* group = -S2 pos -2 +1 > 1 (group is at 1 now since it "collapses" wems but becomes a position)
* #sequence of 3
* bgm pos +1 > 2
* bgm pos +1 > 3
* #sequence of 2
* bgm pos +1 > 4
* bgm pos +1 > 5
* group = -S2 pos -2 +1 > 4 (groups is at 4 now since are uncollapsed wems at 2/3)
* group = -S3 pos -3 +1 > 2
* group = -L2 pos -2 +1 > 1
*/
txtp->group_pos++;
txtp->group_pos -= cfg.count;
if (auto_pos) {
cfg.position = txtp->group_pos - 1; /* internally 1 = first */
}
//;VGM_LOG("TXTP: parsed group %i%c%i%c, auto=%i\n",cfg.position+1,cfg.type,cfg.count,cfg.repeat, auto_pos);
/* add final group */
{
/* resize in steps if not enough */
if (txtp->group_count+1 > txtp->group_max) {
txtp_group *temp_group;
txtp->group_max += 5;
temp_group = realloc(txtp->group, sizeof(txtp_group) * txtp->group_max);
if (!temp_group) goto fail;
txtp->group = temp_group;
}
/* new group */
txtp->group[txtp->group_count] = cfg; /* memcpy */
txtp->group_count++;
}
return 1;
fail:
return 0;
}
static void clean_filename(char* filename) {
int i;
size_t len;
if (filename[0] == '\0')
return;
/* normalize paths */
fix_dir_separators(filename);
/* remove trailing spaces */
len = strlen(filename);
for (i = len-1; i > 0; i--) {
if (filename[i] != ' ')
break;
filename[i] = '\0';
}
}
static int add_entry(txtp_header* txtp, char* filename, int is_default) {
int i;
txtp_entry entry = {0};
//;VGM_LOG("TXTP: filename=%s\n", filename);
/* parse filename: file.ext#(commands) */
{
char* params;
if (is_default) {
params = filename; /* multiple commands without filename */
}
else {
/* find settings start after filenames (filenames can also contain dots and #,
* so this may be fooled by certain patterns) */
params = strchr(filename, '.'); /* first dot (may be a false positive) */
if (!params) /* extensionless */
params = filename;
params = strchr(params, '#'); /* next should be actual settings */
if (!params)
params = NULL;
}
parse_params(&entry, params);
}
clean_filename(filename);
//;VGM_LOG("TXTP: clean filename='%s'\n", filename);
/* settings that applies to final vgmstream */
if (is_default) {
txtp->default_entry_set = 1;
add_settings(&txtp->default_entry, &entry, NULL);
return 1;
}
/* add final entry */
for (i = entry.range_start; i < entry.range_end; i++){
txtp_entry* current;
/* resize in steps if not enough */
if (txtp->entry_count+1 > txtp->entry_max) {
txtp_entry* temp_entry;
txtp->entry_max += 5;
temp_entry = realloc(txtp->entry, sizeof(txtp_entry) * txtp->entry_max);
if (!temp_entry) goto fail;
txtp->entry = temp_entry;
}
/* new entry */
current = &txtp->entry[txtp->entry_count];
memset(current,0, sizeof(txtp_entry));
entry.subsong = (i+1);
add_settings(current, &entry, filename);
txtp->entry_count++;
txtp->group_pos++;
}
return 1;
fail:
return 0;
}
/*******************************************************************************/
/* PARSER - BASE */
/*******************************************************************************/
static int is_substring(const char* val, const char* cmp) {
int n;
char subval[TXTP_LINE_MAX] = {0};
/* read string without trailing spaces or comments/commands */
if (sscanf(val, " %s%n[^ #\t\r\n]%n", subval, &n, &n) != 1)
return 0;
if (0 != strcmp(subval,cmp))
return 0;
return n;
}
static int parse_num(const char* val, uint32_t* out_value) {
int hex = (val[0]=='0' && val[1]=='x');
if (sscanf(val, hex ? "%x" : "%u", out_value) != 1)
goto fail;
return 1;
fail:
return 0;
}
static int parse_keyval(txtp_header* txtp, const char* key, const char* val) {
//;VGM_LOG("TXTP: key=val '%s'='%s'\n", key,val);
if (0==strcmp(key,"loop_start_segment")) {
if (!parse_num(val, &txtp->loop_start_segment)) goto fail;
}
else if (0==strcmp(key,"loop_end_segment")) {
if (!parse_num(val, &txtp->loop_end_segment)) goto fail;
}
else if (0==strcmp(key,"mode")) {
if (is_substring(val,"layers")) {
txtp->is_segmented = 0;
txtp->is_layered = 1;
}
else if (is_substring(val,"segments")) {
txtp->is_segmented = 1;
txtp->is_layered = 0;
}
else if (is_substring(val,"mixed")) {
txtp->is_segmented = 0;
txtp->is_layered = 0;
}
else {
goto fail;
}
}
else if (0==strcmp(key,"loop_mode")) {
if (is_substring(val,"keep")) {
txtp->is_loop_keep = 1;
}
else if (is_substring(val,"auto")) {
txtp->is_loop_auto = 1;
}
else {
goto fail;
}
}
else if (0==strcmp(key,"commands")) {
char val2[TXTP_LINE_MAX];
strcpy(val2, val); /* copy since val is modified here but probably not important */
if (!add_entry(txtp, val2, 1)) goto fail;
}
else if (0==strcmp(key,"group")) {
char val2[TXTP_LINE_MAX];
strcpy(val2, val); /* copy since val is modified here but probably not important */
if (!add_group(txtp, val2)) goto fail;
}
else {
goto fail;
}
return 1;
fail:
VGM_LOG("TXTP: error while parsing key=val '%s'='%s'\n", key,val);
return 0;
}
static txtp_header* parse_txtp(STREAMFILE* sf) {
txtp_header* txtp = NULL;
off_t txt_offset = 0x00;
off_t file_size = get_streamfile_size(sf);
txtp = calloc(1,sizeof(txtp_header));
if (!txtp) goto fail;
/* defaults */
txtp->is_segmented = 1;
/* skip BOM if needed */
if (file_size > 0 &&
((uint16_t)read_16bitLE(0x00, sf) == 0xFFFE || (uint16_t)read_16bitLE(0x00, sf) == 0xFEFF))
txt_offset = 0x02;
/* read and parse lines */
while (txt_offset < file_size) {
char line[TXTP_LINE_MAX];
char key[TXTP_LINE_MAX] = {0}, val[TXTP_LINE_MAX] = {0}; /* at least as big as a line to avoid overflows (I hope) */
char filename[TXTP_LINE_MAX] = {0};
int ok, bytes_read, line_ok;
bytes_read = read_line(line, sizeof(line), txt_offset, sf, &line_ok);
if (!line_ok) goto fail;
txt_offset += bytes_read;
/* get key/val (ignores lead/trail spaces, # may be commands or comments) */
ok = sscanf(line, " %[^ \t#=] = %[^\t\r\n] ", key,val);
if (ok == 2) { /* key=val */
if (!parse_keyval(txtp, key, val)) /* read key/val */
goto fail;
continue;
}
/* must be a filename (only remove spaces from start/end, as filenames con contain mid spaces/#/etc) */
ok = sscanf(line, " %[^\t\r\n] ", filename);
if (ok != 1) /* not a filename either */
continue;
if (filename[0] == '#')
continue; /* simple comment */
/* filename with settings */
if (!add_entry(txtp, filename, 0))
goto fail;
}
/* mini-txth: if no entries are set try with filename, ex. from "song.ext#3.txtp" use "song.ext#3"
* (it's possible to have default "commands" inside the .txtp plus filename+settings) */
if (txtp->entry_count == 0) {
char filename[PATH_LIMIT] = {0};
get_streamfile_basename(sf, filename, sizeof(filename));
add_entry(txtp, filename, 0);
}
return txtp;
fail:
clean_txtp(txtp, 1);
return NULL;
}
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