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https://github.com/vgmstream/vgmstream.git
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Add TXTH base_offset, loop_behavior, improve math without spaces
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bnnm
parent
efacca42de
commit
bba3bd98ee
108
src/meta/txth.c
108
src/meta/txth.c
@ -70,6 +70,7 @@ typedef struct {
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uint32_t skip_samples;
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uint32_t loop_flag;
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uint32_t loop_behavior;
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int loop_flag_set;
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int loop_flag_auto;
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@ -105,6 +106,8 @@ typedef struct {
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int chunk_size_set;
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int chunk_count_set;
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uint32_t base_offset;
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/* original STREAMFILE and its type (may be an unsupported "base" file or a .txth) */
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STREAMFILE *streamFile;
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int streamfile_is_txth;
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@ -565,6 +568,19 @@ static VGMSTREAM *init_subfile(txth_header * txth) {
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//todo: other combos with subsongs + subfile?
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/* load some fields for possible calcs */
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if (!txth->channels)
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txth->channels = vgmstream->channels;
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if (!txth->sample_rate)
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txth->sample_rate = vgmstream->sample_rate;
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if (!txth->interleave)
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txth->interleave = vgmstream->interleave_block_size;
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if (!txth->interleave_last)
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txth->interleave_last = vgmstream->interleave_last_block_size;
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//if (!txth->loop_flag) //?
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// txth->loop_flag = vgmstream->loop_flag;
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close_streamfile(streamSubfile);
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return vgmstream;
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@ -696,7 +712,6 @@ static int parse_num(STREAMFILE * streamFile, txth_header * txth, const char * v
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static int parse_string(STREAMFILE * streamFile, txth_header * txth, const char * val, char * str);
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static int parse_coef_table(STREAMFILE * streamFile, txth_header * txth, const char * val, uint8_t * out_value, size_t out_size);
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static int is_string(const char * val, const char * cmp);
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static int is_substring(const char * val, const char * cmp);
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static int get_bytes_to_samples(txth_header * txth, uint32_t bytes);
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static int get_padding_size(txth_header * txth, int discard_empty);
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@ -979,11 +994,32 @@ static int parse_keyval(STREAMFILE * streamFile_, txth_header * txth, const char
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else {
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if (!parse_num(txth->streamHead,txth,val, &txth->loop_flag)) goto fail;
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txth->loop_flag_set = 1;
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if (txth->loop_flag == 0xFFFF || txth->loop_flag == 0xFFFFFFFF) { /* normally -1 = no loop */
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if (txth->loop_behavior == 0) {
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if ((txth->loop_flag == 0xFFFF || txth->loop_flag == 0xFFFFFFFF) )
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txth->loop_flag = 0;
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}
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else if (txth->loop_behavior == 1) {
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if (txth->loop_flag == 0xFF || txth->loop_flag == 0xFFFF || txth->loop_flag == 0xFFFFFFFF)
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txth->loop_flag = 1;
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}
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else if (txth->loop_behavior == 2) {
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if (txth->loop_flag == 0xFF || txth->loop_flag == 0xFFFF || txth->loop_flag == 0xFFFFFFFF)
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txth->loop_flag = 0;
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}
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}
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}
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else if (is_string(key,"loop_behavior")) {
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if (is_string(val, "default"))
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txth->loop_behavior = 0;
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else if (is_string(val, "negative"))
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txth->loop_behavior = 1;
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else if (is_string(val, "positive"))
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txth->loop_behavior = 2;
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else
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goto fail;
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}
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/* COEFS */
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else if (is_string(key,"coef_offset")) {
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@ -1139,6 +1175,12 @@ static int parse_keyval(STREAMFILE * streamFile_, txth_header * txth, const char
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set_body_chunk(txth);
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}
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/* BASE OFFSET */
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else if (is_string(key,"base_offset")) {
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if (!parse_num(txth->streamHead,txth,val, &txth->base_offset)) goto fail;
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}
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/* DEFAULT */
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else {
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VGM_LOG("TXTH: unknown key=%s, val=%s\n", key,val);
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@ -1152,8 +1194,28 @@ fail:
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return 0;
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}
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static int is_substring(const char * val, const char * cmp, int inline_field) {
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char chr;
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int len = strlen(cmp);
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/* "val" must contain "cmp" entirely */
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if (strncmp(val, cmp, len) != 0)
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return 0;
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chr = val[len];
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/* "val" can end with math for inline fields (like interleave*0x10) */
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if (inline_field && (chr == '+' || chr == '-' || chr == '*' || chr == '/'))
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return len;
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/* otherwise "val" ends in space or eof (to tell "interleave" and "interleave_last" apart) */
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if (chr != '\0' && chr != ' ')
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return 0;
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return len;
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}
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static int is_string(const char * val, const char * cmp) {
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int len = is_substring(val, cmp);
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int len = is_substring(val, cmp, 0);
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if (!len) return 0;
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/* also test that after string there aren't other values
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@ -1166,19 +1228,8 @@ static int is_string(const char * val, const char * cmp) {
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return len;
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}
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static int is_substring(const char * val, const char * cmp) {
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int len = strlen(cmp);
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if (strncmp(val, cmp, len) != 0)
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return 0;
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/* string in val must be a full word (end with null or space) to
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* avoid mistaking stuff like "interleave" with "interleave_last"
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* (could also check , except when used for math */
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if (val[len] != '\0' && val[len] != ' ')
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return 0;
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return len;
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static int is_string_field(const char * val, const char * cmp) {
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return is_substring(val, cmp, 1);
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}
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static int parse_string(STREAMFILE * streamFile, txth_header * txth, const char * val, char * str) {
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@ -1278,6 +1329,9 @@ static int parse_num(STREAMFILE * streamFile, txth_header * txth, const char * v
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if (sscanf(val, hex ? "@%x%n" : "@%u%n", &offset, &n) != 1) goto fail;
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}
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/* adjust offset */
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offset += txth->base_offset;
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if (/*offset < 0 ||*/ offset > get_streamfile_size(streamFile))
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goto fail;
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@ -1306,17 +1360,17 @@ static int parse_num(STREAMFILE * streamFile, txth_header * txth, const char * v
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value_read = 1;
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}
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else { /* known field */
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if ((n = is_substring(val,"interleave"))) value = txth->interleave;
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else if ((n = is_substring(val,"interleave_last"))) value = txth->interleave_last;
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else if ((n = is_substring(val,"channels"))) value = txth->channels;
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else if ((n = is_substring(val,"sample_rate"))) value = txth->sample_rate;
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else if ((n = is_substring(val,"start_offset"))) value = txth->start_offset;
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else if ((n = is_substring(val,"data_size"))) value = txth->data_size;
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else if ((n = is_substring(val,"num_samples"))) value = txth->num_samples;
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else if ((n = is_substring(val,"loop_start_sample"))) value = txth->loop_start_sample;
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else if ((n = is_substring(val,"loop_end_sample"))) value = txth->loop_end_sample;
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else if ((n = is_substring(val,"subsong_count"))) value = txth->subsong_count;
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else if ((n = is_substring(val,"subsong_offset"))) value = txth->subsong_offset;
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if ((n = is_string_field(val,"interleave"))) value = txth->interleave;
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else if ((n = is_string_field(val,"interleave_last"))) value = txth->interleave_last;
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else if ((n = is_string_field(val,"channels"))) value = txth->channels;
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else if ((n = is_string_field(val,"sample_rate"))) value = txth->sample_rate;
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else if ((n = is_string_field(val,"start_offset"))) value = txth->start_offset;
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else if ((n = is_string_field(val,"data_size"))) value = txth->data_size;
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else if ((n = is_string_field(val,"num_samples"))) value = txth->num_samples;
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else if ((n = is_string_field(val,"loop_start_sample"))) value = txth->loop_start_sample;
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else if ((n = is_string_field(val,"loop_end_sample"))) value = txth->loop_end_sample;
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else if ((n = is_string_field(val,"subsong_count"))) value = txth->subsong_count;
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else if ((n = is_string_field(val,"subsong_offset"))) value = txth->subsong_offset;
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else goto fail;
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value_read = 1;
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}
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