| /* libFLAC - Free Lossless Audio Codec library |
| * Copyright (C) 2001,2002 Josh Coalson |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 02111-1307, USA. |
| */ |
| |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "private/metadata.h" |
| |
| #include "FLAC/assert.h" |
| |
| |
| /**************************************************************************** |
| * |
| * Local routines |
| * |
| ***************************************************************************/ |
| |
| static FLAC__bool copy_bytes_(FLAC__byte **to, const FLAC__byte *from, unsigned bytes) |
| { |
| if(bytes > 0 && 0 != from) { |
| FLAC__byte *x; |
| if(0 == (x = malloc(bytes))) |
| return false; |
| memcpy(x, from, bytes); |
| *to = x; |
| } |
| else { |
| FLAC__ASSERT(0 == from); |
| FLAC__ASSERT(bytes == 0); |
| *to = 0; |
| } |
| return true; |
| } |
| |
| static FLAC__bool copy_vcentry_(FLAC__StreamMetadata_VorbisComment_Entry *to, const FLAC__StreamMetadata_VorbisComment_Entry *from) |
| { |
| to->length = from->length; |
| if(0 == from->entry) { |
| FLAC__ASSERT(from->length == 0); |
| to->entry = 0; |
| } |
| else { |
| FLAC__byte *x; |
| FLAC__ASSERT(from->length > 0); |
| if(0 == (x = malloc(from->length))) |
| return false; |
| memcpy(x, from->entry, from->length); |
| to->entry = x; |
| } |
| return true; |
| } |
| |
| static void seektable_calculate_length_(FLAC__StreamMetadata *object) |
| { |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); |
| |
| object->length = object->data.seek_table.num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH; |
| } |
| |
| static FLAC__StreamMetadata_SeekPoint *seekpoint_array_new_(unsigned num_points) |
| { |
| FLAC__StreamMetadata_SeekPoint *object_array; |
| |
| FLAC__ASSERT(num_points > 0); |
| |
| object_array = malloc(num_points * sizeof(FLAC__StreamMetadata_SeekPoint)); |
| |
| if(0 != object_array) { |
| unsigned i; |
| for(i = 0; i < num_points; i++) { |
| object_array[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER; |
| object_array[i].stream_offset = 0; |
| object_array[i].frame_samples = 0; |
| } |
| } |
| |
| return object_array; |
| } |
| |
| static void vorbiscomment_calculate_length_(FLAC__StreamMetadata *object) |
| { |
| unsigned i; |
| |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); |
| |
| object->length = (FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN) / 8; |
| object->length += object->data.vorbis_comment.vendor_string.length; |
| object->length += (FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8; |
| for(i = 0; i < object->data.vorbis_comment.num_comments; i++) { |
| object->length += (FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8); |
| object->length += object->data.vorbis_comment.comments[i].length; |
| } |
| } |
| |
| static FLAC__StreamMetadata_VorbisComment_Entry *vorbiscomment_entry_array_new_(unsigned num_comments) |
| { |
| FLAC__StreamMetadata_VorbisComment_Entry *object_array; |
| |
| FLAC__ASSERT(num_comments > 0); |
| |
| object_array = malloc(num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry)); |
| |
| if(0 != object_array) |
| memset(object_array, 0, num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry)); |
| |
| return object_array; |
| } |
| |
| static void vorbiscomment_entry_array_delete_(FLAC__StreamMetadata_VorbisComment_Entry *object_array, unsigned num_comments) |
| { |
| unsigned i; |
| |
| FLAC__ASSERT(0 != object_array && num_comments > 0); |
| |
| for(i = 0; i < num_comments; i++) |
| if(0 != object_array[i].entry) |
| free(object_array[i].entry); |
| |
| if(0 != object_array) |
| free(object_array); |
| } |
| |
| static FLAC__StreamMetadata_VorbisComment_Entry *vorbiscomment_entry_array_copy_(const FLAC__StreamMetadata_VorbisComment_Entry *object_array, unsigned num_comments) |
| { |
| FLAC__StreamMetadata_VorbisComment_Entry *return_array; |
| |
| FLAC__ASSERT(0 != object_array); |
| FLAC__ASSERT(num_comments > 0); |
| |
| return_array = vorbiscomment_entry_array_new_(num_comments); |
| |
| if(0 != return_array) { |
| unsigned i; |
| |
| /* Need to do this to set the pointers inside the comments to 0. |
| * In case of an error in the following loop, the object will be |
| * deleted and we don't want the destructor freeing uninitialized |
| * pointers. |
| */ |
| memset(return_array, 0, num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry)); |
| |
| for(i = 0; i < num_comments; i++) { |
| if(!copy_vcentry_(return_array+i, object_array+i)) { |
| vorbiscomment_entry_array_delete_(return_array, num_comments); |
| return 0; |
| } |
| } |
| } |
| |
| return return_array; |
| } |
| |
| static FLAC__bool vorbiscomment_set_entry_(FLAC__StreamMetadata *object, FLAC__StreamMetadata_VorbisComment_Entry *dest, const FLAC__StreamMetadata_VorbisComment_Entry *src, FLAC__bool copy) |
| { |
| FLAC__byte *save; |
| |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(0 != dest); |
| FLAC__ASSERT(0 != src); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); |
| FLAC__ASSERT((0 != src->entry && src->length > 0) || (0 == src->entry && src->length == 0 && copy == false)); |
| |
| save = dest->entry; |
| |
| /* do the copy first so that if we fail we leave the object untouched */ |
| if(copy) { |
| if(!copy_vcentry_(dest, src)) |
| return false; |
| } |
| else { |
| *dest = *src; |
| } |
| |
| if(0 != save) |
| free(save); |
| |
| vorbiscomment_calculate_length_(object); |
| return true; |
| } |
| |
| |
| /**************************************************************************** |
| * |
| * Metadata object routines |
| * |
| ***************************************************************************/ |
| |
| FLAC__StreamMetadata *FLAC__metadata_object_new(FLAC__MetadataType type) |
| { |
| FLAC__StreamMetadata *object = malloc(sizeof(FLAC__StreamMetadata)); |
| if(0 != object) { |
| memset(object, 0, sizeof(FLAC__StreamMetadata)); |
| object->is_last = false; |
| object->type = type; |
| switch(type) { |
| case FLAC__METADATA_TYPE_STREAMINFO: |
| object->length = FLAC__STREAM_METADATA_STREAMINFO_LENGTH; |
| break; |
| case FLAC__METADATA_TYPE_PADDING: |
| break; |
| case FLAC__METADATA_TYPE_APPLICATION: |
| object->length = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8; |
| break; |
| case FLAC__METADATA_TYPE_SEEKTABLE: |
| break; |
| case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| object->length = (FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN + FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8; |
| break; |
| default: |
| /* double protection: */ |
| FLAC__ASSERT(0); |
| free(object); |
| return 0; |
| } |
| } |
| |
| return object; |
| } |
| |
| FLAC__StreamMetadata *FLAC__metadata_object_clone(const FLAC__StreamMetadata *object) |
| { |
| FLAC__StreamMetadata *to; |
| |
| FLAC__ASSERT(0 != object); |
| |
| if(0 != (to = FLAC__metadata_object_new(object->type))) { |
| to->is_last = object->is_last; |
| to->type = object->type; |
| to->length = object->length; |
| switch(to->type) { |
| case FLAC__METADATA_TYPE_STREAMINFO: |
| memcpy(&to->data.stream_info, &object->data.stream_info, sizeof(FLAC__StreamMetadata_StreamInfo)); |
| break; |
| case FLAC__METADATA_TYPE_PADDING: |
| break; |
| case FLAC__METADATA_TYPE_APPLICATION: |
| memcpy(&to->data.application.id, &object->data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8); |
| if(!copy_bytes_(&to->data.application.data, object->data.application.data, object->length - FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8)) { |
| FLAC__metadata_object_delete(to); |
| return 0; |
| } |
| break; |
| case FLAC__METADATA_TYPE_SEEKTABLE: |
| to->data.seek_table.num_points = object->data.seek_table.num_points; |
| if(!copy_bytes_((FLAC__byte**)&to->data.seek_table.points, (FLAC__byte*)object->data.seek_table.points, object->data.seek_table.num_points * sizeof(FLAC__StreamMetadata_SeekPoint))) { |
| FLAC__metadata_object_delete(to); |
| return 0; |
| } |
| break; |
| case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| if(!copy_vcentry_(&to->data.vorbis_comment.vendor_string, &object->data.vorbis_comment.vendor_string)) { |
| FLAC__metadata_object_delete(to); |
| return 0; |
| } |
| if(object->data.vorbis_comment.num_comments == 0) { |
| FLAC__ASSERT(0 == object->data.vorbis_comment.comments); |
| to->data.vorbis_comment.comments = 0; |
| } |
| else { |
| FLAC__ASSERT(0 != object->data.vorbis_comment.comments); |
| to->data.vorbis_comment.comments = vorbiscomment_entry_array_copy_(object->data.vorbis_comment.comments, object->data.vorbis_comment.num_comments); |
| if(0 == to->data.vorbis_comment.comments) { |
| FLAC__metadata_object_delete(to); |
| return 0; |
| } |
| } |
| to->data.vorbis_comment.num_comments = object->data.vorbis_comment.num_comments; |
| break; |
| default: |
| /* double protection: */ |
| FLAC__ASSERT(0); |
| free(to); |
| return 0; |
| } |
| } |
| |
| return to; |
| } |
| |
| void FLAC__metadata_object_delete_data(FLAC__StreamMetadata *object) |
| { |
| FLAC__ASSERT(0 != object); |
| |
| switch(object->type) { |
| case FLAC__METADATA_TYPE_STREAMINFO: |
| case FLAC__METADATA_TYPE_PADDING: |
| break; |
| case FLAC__METADATA_TYPE_APPLICATION: |
| if(0 != object->data.application.data) |
| free(object->data.application.data); |
| break; |
| case FLAC__METADATA_TYPE_SEEKTABLE: |
| if(0 != object->data.seek_table.points) |
| free(object->data.seek_table.points); |
| break; |
| case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| if(0 != object->data.vorbis_comment.vendor_string.entry) |
| free(object->data.vorbis_comment.vendor_string.entry); |
| if(0 != object->data.vorbis_comment.comments) { |
| FLAC__ASSERT(object->data.vorbis_comment.num_comments > 0); |
| vorbiscomment_entry_array_delete_(object->data.vorbis_comment.comments, object->data.vorbis_comment.num_comments); |
| } |
| break; |
| default: |
| FLAC__ASSERT(0); |
| } |
| } |
| |
| void FLAC__metadata_object_delete(FLAC__StreamMetadata *object) |
| { |
| FLAC__metadata_object_delete_data(object); |
| free(object); |
| } |
| |
| static FLAC__bool compare_block_data_streaminfo_(const FLAC__StreamMetadata_StreamInfo *block1, const FLAC__StreamMetadata_StreamInfo *block2) |
| { |
| if(block1->min_blocksize != block2->min_blocksize) |
| return false; |
| if(block1->max_blocksize != block2->max_blocksize) |
| return false; |
| if(block1->min_framesize != block2->min_framesize) |
| return false; |
| if(block1->max_framesize != block2->max_framesize) |
| return false; |
| if(block1->sample_rate != block2->sample_rate) |
| return false; |
| if(block1->channels != block2->channels) |
| return false; |
| if(block1->bits_per_sample != block2->bits_per_sample) |
| return false; |
| if(block1->total_samples != block2->total_samples) |
| return false; |
| if(0 != memcmp(block1->md5sum, block2->md5sum, 16)) |
| return false; |
| return true; |
| } |
| |
| static FLAC__bool compare_block_data_application_(const FLAC__StreamMetadata_Application *block1, const FLAC__StreamMetadata_Application *block2, unsigned block_length) |
| { |
| FLAC__ASSERT(0 != block1); |
| FLAC__ASSERT(0 != block2); |
| FLAC__ASSERT(block_length >= sizeof(block1->id)); |
| |
| if(0 != memcmp(block1->id, block2->id, sizeof(block1->id))) |
| return false; |
| if(0 != block1->data && 0 != block2->data) |
| return 0 == memcmp(block1->data, block2->data, block_length - sizeof(block1->id)); |
| else |
| return block1->data == block2->data; |
| } |
| |
| static FLAC__bool compare_block_data_seektable_(const FLAC__StreamMetadata_SeekTable *block1, const FLAC__StreamMetadata_SeekTable *block2) |
| { |
| unsigned i; |
| |
| FLAC__ASSERT(0 != block1); |
| FLAC__ASSERT(0 != block2); |
| |
| if(block1->num_points != block2->num_points) |
| return false; |
| |
| if(0 != block1->points && 0 != block2->points) { |
| for(i = 0; i < block1->num_points; i++) { |
| if(block1->points[i].sample_number != block2->points[i].sample_number) |
| return false; |
| if(block1->points[i].stream_offset != block2->points[i].stream_offset) |
| return false; |
| if(block1->points[i].frame_samples != block2->points[i].frame_samples) |
| return false; |
| } |
| return true; |
| } |
| else |
| return block1->points == block2->points; |
| } |
| |
| static FLAC__bool compare_block_data_vorbiscomment_(const FLAC__StreamMetadata_VorbisComment *block1, const FLAC__StreamMetadata_VorbisComment *block2) |
| { |
| unsigned i; |
| |
| if(block1->vendor_string.length != block2->vendor_string.length) |
| return false; |
| |
| if(0 != block1->vendor_string.entry && 0 != block2->vendor_string.entry) { |
| if(0 != memcmp(block1->vendor_string.entry, block2->vendor_string.entry, block1->vendor_string.length)) |
| return false; |
| } |
| else if(block1->vendor_string.entry != block2->vendor_string.entry) |
| return false; |
| |
| if(block1->num_comments != block2->num_comments) |
| return false; |
| |
| for(i = 0; i < block1->num_comments; i++) { |
| if(0 != block1->comments[i].entry && 0 != block2->comments[i].entry) { |
| if(0 != memcmp(block1->comments[i].entry, block2->comments[i].entry, block1->comments[i].length)) |
| return false; |
| } |
| else if(block1->comments[i].entry != block2->comments[i].entry) |
| return false; |
| } |
| return true; |
| } |
| |
| FLAC__bool FLAC__metadata_object_is_equal(const FLAC__StreamMetadata *block1, const FLAC__StreamMetadata *block2) |
| { |
| FLAC__ASSERT(0 != block1); |
| FLAC__ASSERT(0 != block2); |
| |
| if(block1->type != block2->type) { |
| return false; |
| } |
| if(block1->is_last != block2->is_last) { |
| return false; |
| } |
| if(block1->length != block2->length) { |
| return false; |
| } |
| switch(block1->type) { |
| case FLAC__METADATA_TYPE_STREAMINFO: |
| return compare_block_data_streaminfo_(&block1->data.stream_info, &block2->data.stream_info); |
| case FLAC__METADATA_TYPE_PADDING: |
| return true; /* we don't compare the padding guts */ |
| case FLAC__METADATA_TYPE_APPLICATION: |
| return compare_block_data_application_(&block1->data.application, &block2->data.application, block1->length); |
| case FLAC__METADATA_TYPE_SEEKTABLE: |
| return compare_block_data_seektable_(&block1->data.seek_table, &block2->data.seek_table); |
| case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| return compare_block_data_vorbiscomment_(&block1->data.vorbis_comment, &block2->data.vorbis_comment); |
| default: |
| FLAC__ASSERT(0); |
| return false; |
| } |
| } |
| |
| FLAC__bool FLAC__metadata_object_application_set_data(FLAC__StreamMetadata *object, FLAC__byte *data, unsigned length, FLAC__bool copy) |
| { |
| FLAC__byte *save; |
| |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_APPLICATION); |
| FLAC__ASSERT((0 != data && length > 0) || (0 == data && length == 0 && copy == false)); |
| |
| save = object->data.application.data; |
| |
| /* do the copy first so that if we fail we leave the object untouched */ |
| if(copy) { |
| if(!copy_bytes_(&object->data.application.data, data, length)) |
| return false; |
| } |
| else { |
| object->data.application.data = data; |
| } |
| |
| if(0 != save) |
| free(save); |
| |
| object->length = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8 + length; |
| return true; |
| } |
| |
| FLAC__bool FLAC__metadata_object_seektable_resize_points(FLAC__StreamMetadata *object, unsigned new_num_points) |
| { |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); |
| |
| if(0 == object->data.seek_table.points) { |
| FLAC__ASSERT(object->data.seek_table.num_points == 0); |
| if(0 == new_num_points) |
| return true; |
| else if(0 == (object->data.seek_table.points = seekpoint_array_new_(new_num_points))) |
| return false; |
| } |
| else { |
| const unsigned old_size = object->data.seek_table.num_points * sizeof(FLAC__StreamMetadata_SeekPoint); |
| const unsigned new_size = new_num_points * sizeof(FLAC__StreamMetadata_SeekPoint); |
| |
| FLAC__ASSERT(object->data.seek_table.num_points > 0); |
| |
| if(new_size == 0) { |
| free(object->data.seek_table.points); |
| object->data.seek_table.points = 0; |
| } |
| else if(0 == (object->data.seek_table.points = realloc(object->data.seek_table.points, new_size))) |
| return false; |
| |
| /* if growing, set new elements to placeholders */ |
| if(new_size > old_size) { |
| unsigned i; |
| for(i = object->data.seek_table.num_points; i < new_num_points; i++) { |
| object->data.seek_table.points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER; |
| object->data.seek_table.points[i].stream_offset = 0; |
| object->data.seek_table.points[i].frame_samples = 0; |
| } |
| } |
| } |
| |
| object->data.seek_table.num_points = new_num_points; |
| |
| seektable_calculate_length_(object); |
| return true; |
| } |
| |
| void FLAC__metadata_object_seektable_set_point(FLAC__StreamMetadata *object, unsigned point_num, FLAC__StreamMetadata_SeekPoint point) |
| { |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); |
| FLAC__ASSERT(object->data.seek_table.num_points > point_num); |
| |
| object->data.seek_table.points[point_num] = point; |
| } |
| |
| FLAC__bool FLAC__metadata_object_seektable_insert_point(FLAC__StreamMetadata *object, unsigned point_num, FLAC__StreamMetadata_SeekPoint point) |
| { |
| int i; |
| |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); |
| FLAC__ASSERT(object->data.seek_table.num_points >= point_num); |
| |
| if(!FLAC__metadata_object_seektable_resize_points(object, object->data.seek_table.num_points+1)) |
| return false; |
| |
| /* move all points >= point_num forward one space */ |
| for(i = (int)object->data.seek_table.num_points-1; i > (int)point_num; i--) |
| object->data.seek_table.points[i] = object->data.seek_table.points[i-1]; |
| |
| FLAC__metadata_object_seektable_set_point(object, point_num, point); |
| seektable_calculate_length_(object); |
| return true; |
| } |
| |
| FLAC__bool FLAC__metadata_object_seektable_delete_point(FLAC__StreamMetadata *object, unsigned point_num) |
| { |
| unsigned i; |
| |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); |
| FLAC__ASSERT(object->data.seek_table.num_points > point_num); |
| |
| /* move all points > point_num backward one space */ |
| for(i = point_num; i < object->data.seek_table.num_points-1; i++) |
| object->data.seek_table.points[i] = object->data.seek_table.points[i+1]; |
| |
| return FLAC__metadata_object_seektable_resize_points(object, object->data.seek_table.num_points-1); |
| } |
| |
| FLAC__bool FLAC__metadata_object_seektable_is_legal(const FLAC__StreamMetadata *object) |
| { |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); |
| |
| return FLAC__format_seektable_is_legal(&object->data.seek_table); |
| } |
| |
| FLAC__bool FLAC__metadata_object_seektable_template_append_placeholders(FLAC__StreamMetadata *object, unsigned num) |
| { |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); |
| |
| if(num > 0) |
| /* WATCHOUT: we rely on the fact that growing the array adds PLACEHOLDERS at the end */ |
| return FLAC__metadata_object_seektable_resize_points(object, object->data.seek_table.num_points + num); |
| else |
| return true; |
| } |
| |
| FLAC__bool FLAC__metadata_object_seektable_template_append_point(FLAC__StreamMetadata *object, FLAC__uint64 sample_number) |
| { |
| FLAC__StreamMetadata_SeekTable *seek_table; |
| |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); |
| |
| seek_table = &object->data.seek_table; |
| |
| if(!FLAC__metadata_object_seektable_resize_points(object, seek_table->num_points + 1)) |
| return false; |
| |
| seek_table->points[seek_table->num_points - 1].sample_number = sample_number; |
| seek_table->points[seek_table->num_points - 1].stream_offset = 0; |
| seek_table->points[seek_table->num_points - 1].frame_samples = 0; |
| |
| return true; |
| } |
| |
| FLAC__bool FLAC__metadata_object_seektable_template_append_points(FLAC__StreamMetadata *object, FLAC__uint64 sample_numbers[], unsigned num) |
| { |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); |
| FLAC__ASSERT(0 != sample_numbers || num == 0); |
| |
| if(num > 0) { |
| FLAC__StreamMetadata_SeekTable *seek_table = &object->data.seek_table; |
| unsigned i, j; |
| |
| i = seek_table->num_points; |
| |
| if(!FLAC__metadata_object_seektable_resize_points(object, seek_table->num_points + num)) |
| return false; |
| |
| for(j = 0; j < num; i++, j++) { |
| seek_table->points[i].sample_number = sample_numbers[j]; |
| seek_table->points[i].stream_offset = 0; |
| seek_table->points[i].frame_samples = 0; |
| } |
| } |
| |
| return true; |
| } |
| |
| FLAC__bool FLAC__metadata_object_seektable_template_append_spaced_points(FLAC__StreamMetadata *object, unsigned num, FLAC__uint64 total_samples) |
| { |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); |
| FLAC__ASSERT(total_samples > 0); |
| |
| if(num > 0) { |
| FLAC__StreamMetadata_SeekTable *seek_table = &object->data.seek_table; |
| unsigned i, j; |
| |
| i = seek_table->num_points; |
| |
| if(!FLAC__metadata_object_seektable_resize_points(object, seek_table->num_points + num)) |
| return false; |
| |
| for(j = 0; j < num; i++, j++) { |
| seek_table->points[i].sample_number = total_samples * (FLAC__uint64)j / (FLAC__uint64)num; |
| seek_table->points[i].stream_offset = 0; |
| seek_table->points[i].frame_samples = 0; |
| } |
| } |
| |
| return true; |
| } |
| |
| FLAC__bool FLAC__metadata_object_seektable_template_sort(FLAC__StreamMetadata *object, FLAC__bool compact) |
| { |
| unsigned unique; |
| |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); |
| |
| unique = FLAC__format_seektable_sort(&object->data.seek_table); |
| |
| return !compact || FLAC__metadata_object_seektable_resize_points(object, unique); |
| } |
| |
| FLAC__bool FLAC__metadata_object_vorbiscomment_set_vendor_string(FLAC__StreamMetadata *object, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy) |
| { |
| return vorbiscomment_set_entry_(object, &object->data.vorbis_comment.vendor_string, &entry, copy); |
| } |
| |
| FLAC__bool FLAC__metadata_object_vorbiscomment_resize_comments(FLAC__StreamMetadata *object, unsigned new_num_comments) |
| { |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); |
| |
| if(0 == object->data.vorbis_comment.comments) { |
| FLAC__ASSERT(object->data.vorbis_comment.num_comments == 0); |
| if(0 == new_num_comments) |
| return true; |
| else if(0 == (object->data.vorbis_comment.comments = vorbiscomment_entry_array_new_(new_num_comments))) |
| return false; |
| } |
| else { |
| const unsigned old_size = object->data.vorbis_comment.num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry); |
| const unsigned new_size = new_num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry); |
| |
| FLAC__ASSERT(object->data.vorbis_comment.num_comments > 0); |
| |
| /* if shrinking, free the truncated entries */ |
| if(new_num_comments < object->data.vorbis_comment.num_comments) { |
| unsigned i; |
| for(i = new_num_comments; i < object->data.vorbis_comment.num_comments; i++) |
| if(0 != object->data.vorbis_comment.comments[i].entry) |
| free(object->data.vorbis_comment.comments[i].entry); |
| } |
| |
| if(new_size == 0) { |
| free(object->data.vorbis_comment.comments); |
| object->data.vorbis_comment.comments = 0; |
| } |
| else if(0 == (object->data.vorbis_comment.comments = realloc(object->data.vorbis_comment.comments, new_size))) |
| return false; |
| |
| /* if growing, zero all the length/pointers of new elements */ |
| if(new_size > old_size) |
| memset(object->data.vorbis_comment.comments + object->data.vorbis_comment.num_comments, 0, new_size - old_size); |
| } |
| |
| object->data.vorbis_comment.num_comments = new_num_comments; |
| |
| vorbiscomment_calculate_length_(object); |
| return true; |
| } |
| |
| FLAC__bool FLAC__metadata_object_vorbiscomment_set_comment(FLAC__StreamMetadata *object, unsigned comment_num, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy) |
| { |
| return vorbiscomment_set_entry_(object, &object->data.vorbis_comment.comments[comment_num], &entry, copy); |
| } |
| |
| FLAC__bool FLAC__metadata_object_vorbiscomment_insert_comment(FLAC__StreamMetadata *object, unsigned comment_num, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy) |
| { |
| FLAC__StreamMetadata_VorbisComment *vc; |
| |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); |
| FLAC__ASSERT(object->data.vorbis_comment.num_comments >= comment_num); |
| |
| vc = &object->data.vorbis_comment; |
| |
| if(!FLAC__metadata_object_vorbiscomment_resize_comments(object, vc->num_comments+1)) |
| return false; |
| |
| /* move all comments >= comment_num forward one space */ |
| memmove(&vc->comments[comment_num+1], &vc->comments[comment_num], sizeof(FLAC__StreamMetadata_VorbisComment_Entry)*(vc->num_comments-1-comment_num)); |
| vc->comments[comment_num].length = 0; |
| vc->comments[comment_num].entry = 0; |
| |
| return FLAC__metadata_object_vorbiscomment_set_comment(object, comment_num, entry, copy); |
| } |
| |
| FLAC__bool FLAC__metadata_object_vorbiscomment_delete_comment(FLAC__StreamMetadata *object, unsigned comment_num) |
| { |
| FLAC__StreamMetadata_VorbisComment *vc; |
| |
| FLAC__ASSERT(0 != object); |
| FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); |
| FLAC__ASSERT(object->data.vorbis_comment.num_comments > comment_num); |
| |
| vc = &object->data.vorbis_comment; |
| |
| /* free the comment at comment_num */ |
| if(0 != vc->comments[comment_num].entry) |
| free(vc->comments[comment_num].entry); |
| |
| /* move all comments > comment_num backward one space */ |
| memmove(&vc->comments[comment_num], &vc->comments[comment_num+1], sizeof(FLAC__StreamMetadata_VorbisComment_Entry)*(vc->num_comments-comment_num-1)); |
| vc->comments[vc->num_comments-1].length = 0; |
| vc->comments[vc->num_comments-1].entry = 0; |
| |
| return FLAC__metadata_object_vorbiscomment_resize_comments(object, vc->num_comments-1); |
| } |