metadata_object.c

/* libFLAC - Free Lossless Audio Codec library * Copyright (C) 2001-2009 Josh Coalson * Copyright (C) 2011-2016 Xiph.Org Foundation * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * - Neither the name of the Xiph.org Foundation nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifdef HAVE_CONFIG_H # include <config.h> #endif #include <stdlib.h> #include <string.h> #include "private/metadata.h" #include "private/memory.h" #include "FLAC/assert.h" #include "share/alloc.h" #include "share/compat.h" /* Alias the first (in share/alloc.h) to the second (in src/libFLAC/memory.c). */ #define safe_malloc_mul_2op_ safe_malloc_mul_2op_p /**************************************************************************** * * Local routines * ***************************************************************************/ /* copy bytes: * from = NULL && bytes = 0 * to <- NULL * from != NULL && bytes > 0 * to <- copy of from * else ASSERT * malloc error leaves 'to' unchanged */ static FLAC__bool copy_bytes_(FLAC__byte **to, const FLAC__byte *from, uint32_t bytes) { FLAC__ASSERT(to != NULL); if (bytes > 0 && from != NULL) { FLAC__byte *x; if ((x = safe_malloc_(bytes)) == NULL) return false; memcpy(x, from, bytes); *to = x; } else { *to = 0; } return true; } #if 0 /* UNUSED */ /* like copy_bytes_(), but free()s the original '*to' if the copy succeeds and the original '*to' is non-NULL */ static FLAC__bool free_copy_bytes_(FLAC__byte **to, const FLAC__byte *from, uint32_t bytes) { FLAC__byte *copy; FLAC__ASSERT(to != NULL); if (copy_bytes_(&copy, from, bytes)) { free(*to); *to = copy; return true; } else return false; } #endif /* reallocate entry to 1 byte larger and add a terminating NUL */ /* realloc() failure leaves entry unchanged */ static FLAC__bool ensure_null_terminated_(FLAC__byte **entry, uint32_t length) { FLAC__byte *x = safe_realloc_add_2op_(*entry, length, /*+*/1); if (x != NULL) { x[length] = '\0'; *entry = x; return true; } else return false; } /* copies the NUL-terminated C-string 'from' to '*to', leaving '*to' * unchanged if malloc fails, free()ing the original '*to' if it * succeeds and the original '*to' was not NULL */ static FLAC__bool copy_cstring_(char **to, const char *from) { char *copy = strdup(from); FLAC__ASSERT(to != NULL); if (copy) { free(*to); *to = copy; return true; } else return false; } static FLAC__bool copy_vcentry_(FLAC__StreamMetadata_VorbisComment_Entry *to, const FLAC__StreamMetadata_VorbisComment_Entry *from) { to->length = from->length; if (from->entry == 0) { FLAC__ASSERT(from->length == 0); to->entry = 0; } else { FLAC__byte *x; FLAC__ASSERT(from->length > 0); if ((x = safe_malloc_add_2op_(from->length, /*+*/1)) == NULL) return false; memcpy(x, from->entry, from->length); x[from->length] = '\0'; to->entry = x; } return true; } static FLAC__bool copy_track_(FLAC__StreamMetadata_CueSheet_Track *to, const FLAC__StreamMetadata_CueSheet_Track *from) { memcpy(to, from, sizeof(FLAC__StreamMetadata_CueSheet_Track)); if (from->indices == 0) { FLAC__ASSERT(from->num_indices == 0); } else { FLAC__StreamMetadata_CueSheet_Index *x; FLAC__ASSERT(from->num_indices > 0); if ((x = safe_malloc_mul_2op_p(from->num_indices, /*times*/sizeof(FLAC__StreamMetadata_CueSheet_Index))) == NULL) return false; memcpy(x, from->indices, from->num_indices * sizeof(FLAC__StreamMetadata_CueSheet_Index)); to->indices = x; } return true; } static void seektable_calculate_length_(FLAC__StreamMetadata *object) { FLAC__ASSERT(object != NULL); 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_(uint32_t num_points) { FLAC__StreamMetadata_SeekPoint *object_array; FLAC__ASSERT(num_points > 0); object_array = safe_malloc_mul_2op_p(num_points, /*times*/sizeof(FLAC__StreamMetadata_SeekPoint)); if (object_array != NULL) { uint32_t 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) { uint32_t 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_(uint32_t num_comments) { FLAC__ASSERT(num_comments > 0); return safe_calloc_(num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry)); } static void vorbiscomment_entry_array_delete_(FLAC__StreamMetadata_VorbisComment_Entry *object_array, uint32_t num_comments) { uint32_t i; FLAC__ASSERT(object_array != NULL && num_comments > 0); for (i = 0; i < num_comments; i++) free(object_array[i].entry); free(object_array); } static FLAC__StreamMetadata_VorbisComment_Entry *vorbiscomment_entry_array_copy_(const FLAC__StreamMetadata_VorbisComment_Entry *object_array, uint32_t num_comments) { FLAC__StreamMetadata_VorbisComment_Entry *return_array; FLAC__ASSERT(object_array != NULL); FLAC__ASSERT(num_comments > 0); return_array = vorbiscomment_entry_array_new_(num_comments); if (return_array != NULL) { uint32_t i; 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(object != NULL); FLAC__ASSERT(dest != NULL); FLAC__ASSERT(src != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); FLAC__ASSERT((src->entry != NULL && src->length > 0) || (src->entry == NULL && src->length == 0)); save = dest->entry; if (src->entry != NULL) { if (copy) { /* do the copy first so that if we fail we leave the dest object untouched */ if (!copy_vcentry_(dest, src)) return false; } else { /* we have to make sure that the string we're taking over is null-terminated */ /* * Stripping the const from src->entry is OK since we're taking * ownership of the pointer. This is a hack around a deficiency * in the API where the same function is used for 'copy' and * 'own', but the source entry is a const pointer. If we were * precise, the 'own' flavor would be a separate function with a * non-const source pointer. But it's not, so we hack away. */ if (!ensure_null_terminated_((FLAC__byte**)(&src->entry), src->length)) return false; *dest = *src; } } else { /* the src is null */ *dest = *src; } free(save); vorbiscomment_calculate_length_(object); return true; } static int vorbiscomment_find_entry_from_(const FLAC__StreamMetadata *object, uint32_t offset, const char *field_name, uint32_t field_name_length) { uint32_t i; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); FLAC__ASSERT(field_name != NULL); for (i = offset; i < object->data.vorbis_comment.num_comments; i++) { if (FLAC__metadata_object_vorbiscomment_entry_matches(object->data.vorbis_comment.comments[i], field_name, field_name_length)) return (int)i; } return -1; } static void cuesheet_calculate_length_(FLAC__StreamMetadata *object) { uint32_t i; FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_CUESHEET); object->length = ( FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN + FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN + FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN + FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN ) / 8; object->length += object->data.cue_sheet.num_tracks * ( FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN ) / 8; for (i = 0; i < object->data.cue_sheet.num_tracks; i++) { object->length += object->data.cue_sheet.tracks[i].num_indices * ( FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN + FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN + FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN ) / 8; } } static FLAC__StreamMetadata_CueSheet_Index *cuesheet_track_index_array_new_(uint32_t num_indices) { FLAC__ASSERT(num_indices > 0); return safe_calloc_(num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index)); } static FLAC__StreamMetadata_CueSheet_Track *cuesheet_track_array_new_(uint32_t num_tracks) { FLAC__ASSERT(num_tracks > 0); return safe_calloc_(num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track)); } static void cuesheet_track_array_delete_(FLAC__StreamMetadata_CueSheet_Track *object_array, uint32_t num_tracks) { uint32_t i; FLAC__ASSERT(object_array != NULL && num_tracks > 0); for (i = 0; i < num_tracks; i++) { if (object_array[i].indices != 0) { FLAC__ASSERT(object_array[i].num_indices > 0); free(object_array[i].indices); } } free(object_array); } static FLAC__StreamMetadata_CueSheet_Track *cuesheet_track_array_copy_(const FLAC__StreamMetadata_CueSheet_Track *object_array, uint32_t num_tracks) { FLAC__StreamMetadata_CueSheet_Track *return_array; FLAC__ASSERT(object_array != NULL); FLAC__ASSERT(num_tracks > 0); return_array = cuesheet_track_array_new_(num_tracks); if (return_array != NULL) { uint32_t i; for (i = 0; i < num_tracks; i++) { if (!copy_track_(return_array+i, object_array+i)) { cuesheet_track_array_delete_(return_array, num_tracks); return 0; } } } return return_array; } static FLAC__bool cuesheet_set_track_(FLAC__StreamMetadata *object, FLAC__StreamMetadata_CueSheet_Track *dest, const FLAC__StreamMetadata_CueSheet_Track *src, FLAC__bool copy) { FLAC__StreamMetadata_CueSheet_Index *save; FLAC__ASSERT(object != NULL); FLAC__ASSERT(dest != NULL); FLAC__ASSERT(src != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_CUESHEET); FLAC__ASSERT((src->indices != NULL && src->num_indices > 0) || (src->indices == NULL && src->num_indices == 0)); save = dest->indices; /* do the copy first so that if we fail we leave the object untouched */ if (copy) { if (!copy_track_(dest, src)) return false; } else { *dest = *src; } free(save); cuesheet_calculate_length_(object); return true; } /**************************************************************************** * * Metadata object routines * ***************************************************************************/ FLAC_API FLAC__StreamMetadata *FLAC__metadata_object_new(FLAC__MetadataType type) { FLAC__StreamMetadata *object; if (type > FLAC__MAX_METADATA_TYPE) return 0; object = calloc(1, sizeof(FLAC__StreamMetadata)); if (object != NULL) { 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: /* calloc() took care of this for us: object->length = 0; */ break; case FLAC__METADATA_TYPE_APPLICATION: object->length = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8; /* calloc() took care of this for us: object->data.application.data = 0; */ break; case FLAC__METADATA_TYPE_SEEKTABLE: /* calloc() took care of this for us: object->length = 0; object->data.seek_table.num_points = 0; object->data.seek_table.points = 0; */ break; case FLAC__METADATA_TYPE_VORBIS_COMMENT: object->data.vorbis_comment.vendor_string.length = (uint32_t)strlen(FLAC__VENDOR_STRING); if (!copy_bytes_(&object->data.vorbis_comment.vendor_string.entry, (const FLAC__byte*)FLAC__VENDOR_STRING, object->data.vorbis_comment.vendor_string.length+1)) { free(object); return 0; } vorbiscomment_calculate_length_(object); break; case FLAC__METADATA_TYPE_CUESHEET: cuesheet_calculate_length_(object); break; case FLAC__METADATA_TYPE_PICTURE: object->length = ( FLAC__STREAM_METADATA_PICTURE_TYPE_LEN + FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN + /* empty mime_type string */ FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN + /* empty description string */ FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN + FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN + FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN + FLAC__STREAM_METADATA_PICTURE_COLORS_LEN + FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN + 0 /* no data */ ) / 8; object->data.picture.type = FLAC__STREAM_METADATA_PICTURE_TYPE_OTHER; object->data.picture.mime_type = 0; object->data.picture.description = 0; /* calloc() took care of this for us: object->data.picture.width = 0; object->data.picture.height = 0; object->data.picture.depth = 0; object->data.picture.colors = 0; object->data.picture.data_length = 0; object->data.picture.data = 0; */ /* now initialize mime_type and description with empty strings to make things easier on the client */ if (!copy_cstring_(&object->data.picture.mime_type, "")) { free(object); return 0; } if (!copy_cstring_((char**)(&object->data.picture.description), "")) { free(object->data.picture.mime_type); free(object); return 0; } break; default: /* calloc() took care of this for us: object->length = 0; object->data.unknown.data = 0; */ break; } } return object; } FLAC_API FLAC__StreamMetadata *FLAC__metadata_object_clone(const FLAC__StreamMetadata *object) { FLAC__StreamMetadata *to; FLAC__ASSERT(object != NULL); if ((to = FLAC__metadata_object_new(object->type)) != NULL) { 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: if (to->length < FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8) { /* underflow check */ FLAC__metadata_object_delete(to); return 0; } 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 (to->data.seek_table.num_points > UINT32_MAX / sizeof(FLAC__StreamMetadata_SeekPoint)) { /* overflow check */ FLAC__metadata_object_delete(to); return 0; } 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 (to->data.vorbis_comment.vendor_string.entry != NULL) { free(to->data.vorbis_comment.vendor_string.entry); to->data.vorbis_comment.vendor_string.entry = 0; } 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) { to->data.vorbis_comment.comments = 0; } else { to->data.vorbis_comment.comments = vorbiscomment_entry_array_copy_(object->data.vorbis_comment.comments, object->data.vorbis_comment.num_comments); if (to->data.vorbis_comment.comments == NULL) { to->data.vorbis_comment.num_comments = 0; FLAC__metadata_object_delete(to); return 0; } } to->data.vorbis_comment.num_comments = object->data.vorbis_comment.num_comments; break; case FLAC__METADATA_TYPE_CUESHEET: memcpy(&to->data.cue_sheet, &object->data.cue_sheet, sizeof(FLAC__StreamMetadata_CueSheet)); if (object->data.cue_sheet.num_tracks == 0) { FLAC__ASSERT(object->data.cue_sheet.tracks == NULL); } else { FLAC__ASSERT(object->data.cue_sheet.tracks != 0); to->data.cue_sheet.tracks = cuesheet_track_array_copy_(object->data.cue_sheet.tracks, object->data.cue_sheet.num_tracks); if (to->data.cue_sheet.tracks == NULL) { FLAC__metadata_object_delete(to); return 0; } } break; case FLAC__METADATA_TYPE_PICTURE: to->data.picture.type = object->data.picture.type; if (!copy_cstring_(&to->data.picture.mime_type, object->data.picture.mime_type)) { FLAC__metadata_object_delete(to); return 0; } if (!copy_cstring_((char**)(&to->data.picture.description), (const char*)object->data.picture.description)) { FLAC__metadata_object_delete(to); return 0; } to->data.picture.width = object->data.picture.width; to->data.picture.height = object->data.picture.height; to->data.picture.depth = object->data.picture.depth; to->data.picture.colors = object->data.picture.colors; to->data.picture.data_length = object->data.picture.data_length; if (!copy_bytes_((&to->data.picture.data), object->data.picture.data, object->data.picture.data_length)) { FLAC__metadata_object_delete(to); return 0; } break; default: if (!copy_bytes_(&to->data.unknown.data, object->data.unknown.data, object->length)) { FLAC__metadata_object_delete(to); return 0; } break; } } return to; } void FLAC__metadata_object_delete_data(FLAC__StreamMetadata *object) { FLAC__ASSERT(object != NULL); switch(object->type) { case FLAC__METADATA_TYPE_STREAMINFO: case FLAC__METADATA_TYPE_PADDING: break; case FLAC__METADATA_TYPE_APPLICATION: if (object->data.application.data != NULL) { free(object->data.application.data); object->data.application.data = NULL; } break; case FLAC__METADATA_TYPE_SEEKTABLE: if (object->data.seek_table.points != NULL) { free(object->data.seek_table.points); object->data.seek_table.points = NULL; } break; case FLAC__METADATA_TYPE_VORBIS_COMMENT: if (object->data.vorbis_comment.vendor_string.entry != NULL) { free(object->data.vorbis_comment.vendor_string.entry); object->data.vorbis_comment.vendor_string.entry = 0; } if (object->data.vorbis_comment.comments != NULL) { FLAC__ASSERT(object->data.vorbis_comment.num_comments > 0); vorbiscomment_entry_array_delete_(object->data.vorbis_comment.comments, object->data.vorbis_comment.num_comments); object->data.vorbis_comment.comments = NULL; object->data.vorbis_comment.num_comments = 0; } break; case FLAC__METADATA_TYPE_CUESHEET: if (object->data.cue_sheet.tracks != NULL) { FLAC__ASSERT(object->data.cue_sheet.num_tracks > 0); cuesheet_track_array_delete_(object->data.cue_sheet.tracks, object->data.cue_sheet.num_tracks); object->data.cue_sheet.tracks = NULL; object->data.cue_sheet.num_tracks = 0; } break; case FLAC__METADATA_TYPE_PICTURE: if (object->data.picture.mime_type != NULL) { free(object->data.picture.mime_type); object->data.picture.mime_type = NULL; } if (object->data.picture.description != NULL) { free(object->data.picture.description); object->data.picture.description = NULL; } if (object->data.picture.data != NULL) { free(object->data.picture.data); object->data.picture.data = NULL; } break; default: if (object->data.unknown.data != NULL) { free(object->data.unknown.data); object->data.unknown.data = NULL; } break; } } FLAC_API 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 (memcmp(block1->md5sum, block2->md5sum, 16) != 0) return false; return true; } static FLAC__bool compare_block_data_application_(const FLAC__StreamMetadata_Application *block1, const FLAC__StreamMetadata_Application *block2, uint32_t block_length) { FLAC__ASSERT(block1 != NULL); FLAC__ASSERT(block2 != NULL); FLAC__ASSERT(block_length >= sizeof(block1->id)); if (memcmp(block1->id, block2->id, sizeof(block1->id)) != 0) return false; if (block1->data != NULL && block2->data != NULL) return memcmp(block1->data, block2->data, block_length - sizeof(block1->id)) == 0; else return block1->data == block2->data; } static FLAC__bool compare_block_data_seektable_(const FLAC__StreamMetadata_SeekTable *block1, const FLAC__StreamMetadata_SeekTable *block2) { uint32_t i; FLAC__ASSERT(block1 != NULL); FLAC__ASSERT(block2 != NULL); if (block1->num_points != block2->num_points) return false; if (block1->points != NULL && block2->points != NULL) { 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) { uint32_t i; if (block1->vendor_string.length != block2->vendor_string.length) return false; if (block1->vendor_string.entry != NULL && block2->vendor_string.entry != NULL) { if (memcmp(block1->vendor_string.entry, block2->vendor_string.entry, block1->vendor_string.length) != 0) 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 (block1->comments[i].entry != NULL && block2->comments[i].entry != NULL) { if (memcmp(block1->comments[i].entry, block2->comments[i].entry, block1->comments[i].length) != 0) return false; } else if (block1->comments[i].entry != block2->comments[i].entry) return false; } return true; } static FLAC__bool compare_block_data_cuesheet_(const FLAC__StreamMetadata_CueSheet *block1, const FLAC__StreamMetadata_CueSheet *block2) { uint32_t i, j; if (strcmp(block1->media_catalog_number, block2->media_catalog_number) != 0) return false; if (block1->lead_in != block2->lead_in) return false; if (block1->is_cd != block2->is_cd) return false; if (block1->num_tracks != block2->num_tracks) return false; if (block1->tracks != NULL && block2->tracks != NULL) { FLAC__ASSERT(block1->num_tracks > 0); for (i = 0; i < block1->num_tracks; i++) { if (block1->tracks[i].offset != block2->tracks[i].offset) return false; if (block1->tracks[i].number != block2->tracks[i].number) return false; if (memcmp(block1->tracks[i].isrc, block2->tracks[i].isrc, sizeof(block1->tracks[i].isrc)) != 0) return false; if (block1->tracks[i].type != block2->tracks[i].type) return false; if (block1->tracks[i].pre_emphasis != block2->tracks[i].pre_emphasis) return false; if (block1->tracks[i].num_indices != block2->tracks[i].num_indices) return false; if (block1->tracks[i].indices != NULL && block2->tracks[i].indices != NULL) { FLAC__ASSERT(block1->tracks[i].num_indices > 0); for (j = 0; j < block1->tracks[i].num_indices; j++) { if (block1->tracks[i].indices[j].offset != block2->tracks[i].indices[j].offset) return false; if (block1->tracks[i].indices[j].number != block2->tracks[i].indices[j].number) return false; } } else if (block1->tracks[i].indices != block2->tracks[i].indices) return false; } } else if (block1->tracks != block2->tracks) return false; return true; } static FLAC__bool compare_block_data_picture_(const FLAC__StreamMetadata_Picture *block1, const FLAC__StreamMetadata_Picture *block2) { if (block1->type != block2->type) return false; if (block1->mime_type != block2->mime_type && (block1->mime_type == 0 || block2->mime_type == 0 || strcmp(block1->mime_type, block2->mime_type))) return false; if (block1->description != block2->description && (block1->description == 0 || block2->description == 0 || strcmp((const char *)block1->description, (const char *)block2->description))) return false; if (block1->width != block2->width) return false; if (block1->height != block2->height) return false; if (block1->depth != block2->depth) return false; if (block1->colors != block2->colors) return false; if (block1->data_length != block2->data_length) return false; if (block1->data != block2->data && (block1->data == NULL || block2->data == NULL || memcmp(block1->data, block2->data, block1->data_length))) return false; return true; } static FLAC__bool compare_block_data_unknown_(const FLAC__StreamMetadata_Unknown *block1, const FLAC__StreamMetadata_Unknown *block2, uint32_t block_length) { FLAC__ASSERT(block1 != NULL); FLAC__ASSERT(block2 != NULL); if (block1->data != NULL && block2->data != NULL) return memcmp(block1->data, block2->data, block_length) == 0; else return block1->data == block2->data; } FLAC_API FLAC__bool FLAC__metadata_object_is_equal(const FLAC__StreamMetadata *block1, const FLAC__StreamMetadata *block2) { FLAC__ASSERT(block1 != NULL); FLAC__ASSERT(block2 != NULL); 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); case FLAC__METADATA_TYPE_CUESHEET: return compare_block_data_cuesheet_(&block1->data.cue_sheet, &block2->data.cue_sheet); case FLAC__METADATA_TYPE_PICTURE: return compare_block_data_picture_(&block1->data.picture, &block2->data.picture); default: return compare_block_data_unknown_(&block1->data.unknown, &block2->data.unknown, block1->length); } } FLAC_API FLAC__bool FLAC__metadata_object_application_set_data(FLAC__StreamMetadata *object, FLAC__byte *data, uint32_t length, FLAC__bool copy) { FLAC__byte *save; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_APPLICATION); FLAC__ASSERT((data != NULL && length > 0) || (data == NULL && 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; } free(save); object->length = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8 + length; return true; } FLAC_API FLAC__bool FLAC__metadata_object_seektable_resize_points(FLAC__StreamMetadata *object, uint32_t new_num_points) { FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); if (object->data.seek_table.points == 0) { FLAC__ASSERT(object->data.seek_table.num_points == 0); if (new_num_points == 0) return true; else if ((object->data.seek_table.points = seekpoint_array_new_(new_num_points)) == 0) return false; } else { const size_t old_size = object->data.seek_table.num_points * sizeof(FLAC__StreamMetadata_SeekPoint); const size_t new_size = new_num_points * sizeof(FLAC__StreamMetadata_SeekPoint); /* overflow check */ if (new_num_points > UINT32_MAX / sizeof(FLAC__StreamMetadata_SeekPoint)) return false; 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 ((object->data.seek_table.points = safe_realloc_(object->data.seek_table.points, new_size)) == NULL) return false; /* if growing, set new elements to placeholders */ if (new_size > old_size) { uint32_t 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; } FLAC_API void FLAC__metadata_object_seektable_set_point(FLAC__StreamMetadata *object, uint32_t point_num, FLAC__StreamMetadata_SeekPoint point) { FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); FLAC__ASSERT(point_num < object->data.seek_table.num_points); object->data.seek_table.points[point_num] = point; } FLAC_API FLAC__bool FLAC__metadata_object_seektable_insert_point(FLAC__StreamMetadata *object, uint32_t point_num, FLAC__StreamMetadata_SeekPoint point) { int i; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); FLAC__ASSERT(point_num <= object->data.seek_table.num_points); 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_API FLAC__bool FLAC__metadata_object_seektable_delete_point(FLAC__StreamMetadata *object, uint32_t point_num) { uint32_t i; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); FLAC__ASSERT(point_num < object->data.seek_table.num_points); /* 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_API FLAC__bool FLAC__metadata_object_seektable_is_legal(const FLAC__StreamMetadata *object) { FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); return FLAC__format_seektable_is_legal(&object->data.seek_table); } FLAC_API FLAC__bool FLAC__metadata_object_seektable_template_append_placeholders(FLAC__StreamMetadata *object, uint32_t num) { FLAC__ASSERT(object != NULL); 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_API FLAC__bool FLAC__metadata_object_seektable_template_append_point(FLAC__StreamMetadata *object, FLAC__uint64 sample_number) { FLAC__StreamMetadata_SeekTable *seek_table; FLAC__ASSERT(object != NULL); 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_API FLAC__bool FLAC__metadata_object_seektable_template_append_points(FLAC__StreamMetadata *object, FLAC__uint64 sample_numbers[], uint32_t num) { FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); FLAC__ASSERT(sample_numbers != 0 || num == 0); if (num > 0) { FLAC__StreamMetadata_SeekTable *seek_table = &object->data.seek_table; uint32_t 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_API FLAC__bool FLAC__metadata_object_seektable_template_append_spaced_points(FLAC__StreamMetadata *object, uint32_t num, FLAC__uint64 total_samples) { FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); FLAC__ASSERT(total_samples > 0); if (num > 0 && total_samples > 0) { FLAC__StreamMetadata_SeekTable *seek_table = &object->data.seek_table; uint32_t 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_API FLAC__bool FLAC__metadata_object_seektable_template_append_spaced_points_by_samples(FLAC__StreamMetadata *object, uint32_t samples, FLAC__uint64 total_samples) { FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); FLAC__ASSERT(samples > 0); FLAC__ASSERT(total_samples > 0); if (samples > 0 && total_samples > 0) { FLAC__StreamMetadata_SeekTable *seek_table = &object->data.seek_table; uint32_t i, j; FLAC__uint64 num, sample; num = 1 + total_samples / samples; /* 1+ for the first sample at 0 */ /* now account for the fact that we don't place a seekpoint at "total_samples" since samples are number from 0: */ if (total_samples % samples == 0) num--; /* Put a strict upper bound on the number of allowed seek points. */ if (num > 32768) { /* Set the bound and recalculate samples accordingly. */ num = 32768; samples = total_samples / num; } i = seek_table->num_points; if (!FLAC__metadata_object_seektable_resize_points(object, seek_table->num_points + (uint32_t)num)) return false; sample = 0; for (j = 0; j < num; i++, j++, sample += samples) { seek_table->points[i].sample_number = sample; seek_table->points[i].stream_offset = 0; seek_table->points[i].frame_samples = 0; } } return true; } FLAC_API FLAC__bool FLAC__metadata_object_seektable_template_sort(FLAC__StreamMetadata *object, FLAC__bool compact) { uint32_t unique; FLAC__ASSERT(object != NULL); 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_API FLAC__bool FLAC__metadata_object_vorbiscomment_set_vendor_string(FLAC__StreamMetadata *object, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy) { if (!FLAC__format_vorbiscomment_entry_value_is_legal(entry.entry, entry.length)) return false; return vorbiscomment_set_entry_(object, &object->data.vorbis_comment.vendor_string, &entry, copy); } FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_resize_comments(FLAC__StreamMetadata *object, uint32_t new_num_comments) { FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); if (object->data.vorbis_comment.comments == NULL) { FLAC__ASSERT(object->data.vorbis_comment.num_comments == 0); if (new_num_comments == 0) return true; else if ((object->data.vorbis_comment.comments = vorbiscomment_entry_array_new_(new_num_comments)) == NULL) return false; } else { const size_t old_size = object->data.vorbis_comment.num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry); const size_t new_size = new_num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry); /* overflow check */ if (new_num_comments > UINT32_MAX / sizeof(FLAC__StreamMetadata_VorbisComment_Entry)) return false; 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) { uint32_t i; for (i = new_num_comments; i < object->data.vorbis_comment.num_comments; i++) if (object->data.vorbis_comment.comments[i].entry != NULL) 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 { FLAC__StreamMetadata_VorbisComment_Entry *oldptr = object->data.vorbis_comment.comments; if ((object->data.vorbis_comment.comments = realloc(object->data.vorbis_comment.comments, new_size)) == NULL) { vorbiscomment_entry_array_delete_(oldptr, object->data.vorbis_comment.num_comments); object->data.vorbis_comment.num_comments = 0; 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_API FLAC__bool FLAC__metadata_object_vorbiscomment_set_comment(FLAC__StreamMetadata *object, uint32_t comment_num, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy) { FLAC__ASSERT(object != NULL); FLAC__ASSERT(comment_num < object->data.vorbis_comment.num_comments); if (!FLAC__format_vorbiscomment_entry_is_legal(entry.entry, entry.length)) return false; return vorbiscomment_set_entry_(object, &object->data.vorbis_comment.comments[comment_num], &entry, copy); } FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_insert_comment(FLAC__StreamMetadata *object, uint32_t comment_num, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy) { FLAC__StreamMetadata_VorbisComment *vc; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); FLAC__ASSERT(comment_num <= object->data.vorbis_comment.num_comments); if (!FLAC__format_vorbiscomment_entry_is_legal(entry.entry, entry.length)) return false; 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_API FLAC__bool FLAC__metadata_object_vorbiscomment_append_comment(FLAC__StreamMetadata *object, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy) { FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); return FLAC__metadata_object_vorbiscomment_insert_comment(object, object->data.vorbis_comment.num_comments, entry, copy); } FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_replace_comment(FLAC__StreamMetadata *object, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool all, FLAC__bool copy) { FLAC__ASSERT(entry.entry != NULL && entry.length > 0); if (!FLAC__format_vorbiscomment_entry_is_legal(entry.entry, entry.length)) return false; { int i; size_t field_name_length; const FLAC__byte *eq = (FLAC__byte*)memchr(entry.entry, '=', entry.length); if (eq == NULL) return false; /* double protection */ field_name_length = eq-entry.entry; i = vorbiscomment_find_entry_from_(object, 0, (const char *)entry.entry, field_name_length); if (i >= 0) { uint32_t indx = (uint32_t)i; if (!FLAC__metadata_object_vorbiscomment_set_comment(object, indx, entry, copy)) return false; entry = object->data.vorbis_comment.comments[indx]; indx++; /* skip over replaced comment */ if (all && indx < object->data.vorbis_comment.num_comments) { i = vorbiscomment_find_entry_from_(object, indx, (const char *)entry.entry, field_name_length); while (i >= 0) { indx = (uint32_t)i; if (!FLAC__metadata_object_vorbiscomment_delete_comment(object, indx)) return false; if (indx < object->data.vorbis_comment.num_comments) i = vorbiscomment_find_entry_from_(object, indx, (const char *)entry.entry, field_name_length); else i = -1; } } return true; } else return FLAC__metadata_object_vorbiscomment_append_comment(object, entry, copy); } } FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_delete_comment(FLAC__StreamMetadata *object, uint32_t comment_num) { FLAC__StreamMetadata_VorbisComment *vc; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); FLAC__ASSERT(comment_num < object->data.vorbis_comment.num_comments); vc = &object->data.vorbis_comment; /* free the comment at comment_num */ 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); } FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_entry_from_name_value_pair(FLAC__StreamMetadata_VorbisComment_Entry *entry, const char *field_name, const char *field_value) { FLAC__ASSERT(entry != NULL); FLAC__ASSERT(field_name != NULL); FLAC__ASSERT(field_value != NULL); if (!FLAC__format_vorbiscomment_entry_name_is_legal(field_name)) return false; if (!FLAC__format_vorbiscomment_entry_value_is_legal((const FLAC__byte *)field_value, (uint32_t)(-1))) return false; { const size_t nn = strlen(field_name); const size_t nv = strlen(field_value); entry->length = nn + 1 /*=*/ + nv; if ((entry->entry = safe_malloc_add_4op_(nn, /*+*/1, /*+*/nv, /*+*/1)) == NULL) return false; memcpy(entry->entry, field_name, nn); entry->entry[nn] = '='; memcpy(entry->entry+nn+1, field_value, nv); entry->entry[entry->length] = '\0'; } return true; } FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_entry_to_name_value_pair(const FLAC__StreamMetadata_VorbisComment_Entry entry, char **field_name, char **field_value) { FLAC__ASSERT(entry.entry != NULL && entry.length > 0); FLAC__ASSERT(field_name != NULL); FLAC__ASSERT(field_value != NULL); if (!FLAC__format_vorbiscomment_entry_is_legal(entry.entry, entry.length)) return false; { const FLAC__byte *eq = (FLAC__byte*)memchr(entry.entry, '=', entry.length); const size_t nn = eq-entry.entry; const size_t nv = entry.length-nn-1; /* -1 for the '=' */ if (eq == NULL) return false; /* double protection */ if ((*field_name = safe_malloc_add_2op_(nn, /*+*/1)) == NULL) return false; if ((*field_value = safe_malloc_add_2op_(nv, /*+*/1)) == NULL) { free(*field_name); return false; } memcpy(*field_name, entry.entry, nn); memcpy(*field_value, entry.entry+nn+1, nv); (*field_name)[nn] = '\0'; (*field_value)[nv] = '\0'; } return true; } FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_entry_matches(const FLAC__StreamMetadata_VorbisComment_Entry entry, const char *field_name, uint32_t field_name_length) { FLAC__ASSERT(entry.entry != NULL && entry.length > 0); { const FLAC__byte *eq = (FLAC__byte*)memchr(entry.entry, '=', entry.length); return (eq != NULL && (uint32_t)(eq-entry.entry) == field_name_length && FLAC__STRNCASECMP(field_name, (const char *)entry.entry, field_name_length) == 0); } } FLAC_API int FLAC__metadata_object_vorbiscomment_find_entry_from(const FLAC__StreamMetadata *object, uint32_t offset, const char *field_name) { FLAC__ASSERT(field_name != NULL); return vorbiscomment_find_entry_from_(object, offset, field_name, strlen(field_name)); } FLAC_API int FLAC__metadata_object_vorbiscomment_remove_entry_matching(FLAC__StreamMetadata *object, const char *field_name) { const uint32_t field_name_length = strlen(field_name); uint32_t i; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); for (i = 0; i < object->data.vorbis_comment.num_comments; i++) { if (FLAC__metadata_object_vorbiscomment_entry_matches(object->data.vorbis_comment.comments[i], field_name, field_name_length)) { if (!FLAC__metadata_object_vorbiscomment_delete_comment(object, i)) return -1; else return 1; } } return 0; } FLAC_API int FLAC__metadata_object_vorbiscomment_remove_entries_matching(FLAC__StreamMetadata *object, const char *field_name) { FLAC__bool ok = true; uint32_t matching = 0; const uint32_t field_name_length = strlen(field_name); int i; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); /* must delete from end to start otherwise it will interfere with our iteration */ for (i = (int)object->data.vorbis_comment.num_comments - 1; ok && i >= 0; i--) { if (FLAC__metadata_object_vorbiscomment_entry_matches(object->data.vorbis_comment.comments[i], field_name, field_name_length)) { matching++; ok &= FLAC__metadata_object_vorbiscomment_delete_comment(object, (uint32_t)i); } } return ok? (int)matching : -1; } FLAC_API FLAC__StreamMetadata_CueSheet_Track *FLAC__metadata_object_cuesheet_track_new(void) { return calloc(1, sizeof(FLAC__StreamMetadata_CueSheet_Track)); } FLAC_API FLAC__StreamMetadata_CueSheet_Track *FLAC__metadata_object_cuesheet_track_clone(const FLAC__StreamMetadata_CueSheet_Track *object) { FLAC__StreamMetadata_CueSheet_Track *to; FLAC__ASSERT(object != NULL); if ((to = FLAC__metadata_object_cuesheet_track_new()) != NULL) { if (!copy_track_(to, object)) { FLAC__metadata_object_cuesheet_track_delete(to); return 0; } } return to; } void FLAC__metadata_object_cuesheet_track_delete_data(FLAC__StreamMetadata_CueSheet_Track *object) { FLAC__ASSERT(object != NULL); if (object->indices != NULL) { FLAC__ASSERT(object->num_indices > 0); free(object->indices); } } FLAC_API void FLAC__metadata_object_cuesheet_track_delete(FLAC__StreamMetadata_CueSheet_Track *object) { FLAC__metadata_object_cuesheet_track_delete_data(object); free(object); } FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_track_resize_indices(FLAC__StreamMetadata *object, uint32_t track_num, uint32_t new_num_indices) { FLAC__StreamMetadata_CueSheet_Track *track; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_CUESHEET); FLAC__ASSERT(track_num < object->data.cue_sheet.num_tracks); track = &object->data.cue_sheet.tracks[track_num]; if (track->indices == NULL) { FLAC__ASSERT(track->num_indices == 0); if (new_num_indices == 0) return true; else if ((track->indices = cuesheet_track_index_array_new_(new_num_indices)) == NULL) return false; } else { const size_t old_size = track->num_indices * sizeof(FLAC__StreamMetadata_CueSheet_Index); const size_t new_size = new_num_indices * sizeof(FLAC__StreamMetadata_CueSheet_Index); /* overflow check */ if (new_num_indices > UINT32_MAX / sizeof(FLAC__StreamMetadata_CueSheet_Index)) return false; FLAC__ASSERT(track->num_indices > 0); if (new_size == 0) { free(track->indices); track->indices = 0; } else if ((track->indices = safe_realloc_(track->indices, new_size)) == NULL) return false; /* if growing, zero all the lengths/pointers of new elements */ if (new_size > old_size) memset(track->indices + track->num_indices, 0, new_size - old_size); } track->num_indices = new_num_indices; cuesheet_calculate_length_(object); return true; } FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_track_insert_index(FLAC__StreamMetadata *object, uint32_t track_num, uint32_t index_num, FLAC__StreamMetadata_CueSheet_Index indx) { FLAC__StreamMetadata_CueSheet_Track *track; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_CUESHEET); FLAC__ASSERT(track_num < object->data.cue_sheet.num_tracks); FLAC__ASSERT(index_num <= object->data.cue_sheet.tracks[track_num].num_indices); track = &object->data.cue_sheet.tracks[track_num]; if (!FLAC__metadata_object_cuesheet_track_resize_indices(object, track_num, track->num_indices+1)) return false; /* move all indices >= index_num forward one space */ memmove(&track->indices[index_num+1], &track->indices[index_num], sizeof(FLAC__StreamMetadata_CueSheet_Index)*(track->num_indices-1-index_num)); track->indices[index_num] = indx; cuesheet_calculate_length_(object); return true; } FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_track_insert_blank_index(FLAC__StreamMetadata *object, uint32_t track_num, uint32_t index_num) { FLAC__StreamMetadata_CueSheet_Index indx; memset(&indx, 0, sizeof(indx)); return FLAC__metadata_object_cuesheet_track_insert_index(object, track_num, index_num, indx); } FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_track_delete_index(FLAC__StreamMetadata *object, uint32_t track_num, uint32_t index_num) { FLAC__StreamMetadata_CueSheet_Track *track; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_CUESHEET); FLAC__ASSERT(track_num < object->data.cue_sheet.num_tracks); FLAC__ASSERT(index_num < object->data.cue_sheet.tracks[track_num].num_indices); track = &object->data.cue_sheet.tracks[track_num]; /* move all indices > index_num backward one space */ memmove(&track->indices[index_num], &track->indices[index_num+1], sizeof(FLAC__StreamMetadata_CueSheet_Index)*(track->num_indices-index_num-1)); FLAC__metadata_object_cuesheet_track_resize_indices(object, track_num, track->num_indices-1); cuesheet_calculate_length_(object); return true; } FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_resize_tracks(FLAC__StreamMetadata *object, uint32_t new_num_tracks) { FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_CUESHEET); if (object->data.cue_sheet.tracks == NULL) { FLAC__ASSERT(object->data.cue_sheet.num_tracks == 0); if (new_num_tracks == 0) return true; else if ((object->data.cue_sheet.tracks = cuesheet_track_array_new_(new_num_tracks)) == NULL) return false; } else { const size_t old_size = object->data.cue_sheet.num_tracks * sizeof(FLAC__StreamMetadata_CueSheet_Track); const size_t new_size = new_num_tracks * sizeof(FLAC__StreamMetadata_CueSheet_Track); /* overflow check */ if (new_num_tracks > UINT32_MAX / sizeof(FLAC__StreamMetadata_CueSheet_Track)) return false; FLAC__ASSERT(object->data.cue_sheet.num_tracks > 0); /* if shrinking, free the truncated entries */ if (new_num_tracks < object->data.cue_sheet.num_tracks) { uint32_t i; for (i = new_num_tracks; i < object->data.cue_sheet.num_tracks; i++) free(object->data.cue_sheet.tracks[i].indices); } if (new_size == 0) { free(object->data.cue_sheet.tracks); object->data.cue_sheet.tracks = 0; } else if ((object->data.cue_sheet.tracks = safe_realloc_(object->data.cue_sheet.tracks, new_size)) == NULL) return false; /* if growing, zero all the lengths/pointers of new elements */ if (new_size > old_size) memset(object->data.cue_sheet.tracks + object->data.cue_sheet.num_tracks, 0, new_size - old_size); } object->data.cue_sheet.num_tracks = new_num_tracks; cuesheet_calculate_length_(object); return true; } FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_set_track(FLAC__StreamMetadata *object, uint32_t track_num, FLAC__StreamMetadata_CueSheet_Track *track, FLAC__bool copy) { FLAC__ASSERT(object != NULL); FLAC__ASSERT(track_num < object->data.cue_sheet.num_tracks); return cuesheet_set_track_(object, object->data.cue_sheet.tracks + track_num, track, copy); } FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_insert_track(FLAC__StreamMetadata *object, uint32_t track_num, FLAC__StreamMetadata_CueSheet_Track *track, FLAC__bool copy) { FLAC__StreamMetadata_CueSheet *cs; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_CUESHEET); FLAC__ASSERT(track_num <= object->data.cue_sheet.num_tracks); cs = &object->data.cue_sheet; if (!FLAC__metadata_object_cuesheet_resize_tracks(object, cs->num_tracks+1)) return false; /* move all tracks >= track_num forward one space */ memmove(&cs->tracks[track_num+1], &cs->tracks[track_num], sizeof(FLAC__StreamMetadata_CueSheet_Track)*(cs->num_tracks-1-track_num)); cs->tracks[track_num].num_indices = 0; cs->tracks[track_num].indices = 0; return FLAC__metadata_object_cuesheet_set_track(object, track_num, track, copy); } FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_insert_blank_track(FLAC__StreamMetadata *object, uint32_t track_num) { FLAC__StreamMetadata_CueSheet_Track track; memset(&track, 0, sizeof(track)); return FLAC__metadata_object_cuesheet_insert_track(object, track_num, &track, /*copy=*/false); } FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_delete_track(FLAC__StreamMetadata *object, uint32_t track_num) { FLAC__StreamMetadata_CueSheet *cs; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_CUESHEET); FLAC__ASSERT(track_num < object->data.cue_sheet.num_tracks); cs = &object->data.cue_sheet; /* free the track at track_num */ free(cs->tracks[track_num].indices); /* move all tracks > track_num backward one space */ memmove(&cs->tracks[track_num], &cs->tracks[track_num+1], sizeof(FLAC__StreamMetadata_CueSheet_Track)*(cs->num_tracks-track_num-1)); cs->tracks[cs->num_tracks-1].num_indices = 0; cs->tracks[cs->num_tracks-1].indices = 0; return FLAC__metadata_object_cuesheet_resize_tracks(object, cs->num_tracks-1); } FLAC_API FLAC__bool FLAC__metadata_object_cuesheet_is_legal(const FLAC__StreamMetadata *object, FLAC__bool check_cd_da_subset, const char **violation) { FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_CUESHEET); return FLAC__format_cuesheet_is_legal(&object->data.cue_sheet, check_cd_da_subset, violation); } static FLAC__uint64 get_index_01_offset_(const FLAC__StreamMetadata_CueSheet *cs, uint32_t track) { if (track >= (cs->num_tracks-1) || cs->tracks[track].num_indices < 1) return 0; else if (cs->tracks[track].indices[0].number == 1) return cs->tracks[track].indices[0].offset + cs->tracks[track].offset + cs->lead_in; else if (cs->tracks[track].num_indices < 2) return 0; else if (cs->tracks[track].indices[1].number == 1) return cs->tracks[track].indices[1].offset + cs->tracks[track].offset + cs->lead_in; else return 0; } static FLAC__uint32 cddb_add_digits_(FLAC__uint32 x) { FLAC__uint32 n = 0; while (x) { n += (x%10); x /= 10; } return n; } /*@@@@add to tests*/ FLAC_API FLAC__uint32 FLAC__metadata_object_cuesheet_calculate_cddb_id(const FLAC__StreamMetadata *object) { const FLAC__StreamMetadata_CueSheet *cs; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_CUESHEET); cs = &object->data.cue_sheet; if (cs->num_tracks < 2) /* need at least one real track and the lead-out track */ return 0; { FLAC__uint32 i, length, sum = 0; for (i = 0; i < (cs->num_tracks-1); i++) /* -1 to avoid counting the lead-out */ sum += cddb_add_digits_((FLAC__uint32)(get_index_01_offset_(cs, i) / 44100)); length = (FLAC__uint32)((cs->tracks[cs->num_tracks-1].offset+cs->lead_in) / 44100) - (FLAC__uint32)(get_index_01_offset_(cs, 0) / 44100); return (sum % 0xFF) << 24 | length << 8 | (FLAC__uint32)(cs->num_tracks-1); } } FLAC_API FLAC__bool FLAC__metadata_object_picture_set_mime_type(FLAC__StreamMetadata *object, char *mime_type, FLAC__bool copy) { char *old; size_t old_length, new_length; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_PICTURE); FLAC__ASSERT(mime_type != NULL); old = object->data.picture.mime_type; old_length = old? strlen(old) : 0; new_length = strlen(mime_type); /* do the copy first so that if we fail we leave the object untouched */ if (copy) { if (new_length >= SIZE_MAX) /* overflow check */ return false; if (!copy_bytes_((FLAC__byte**)(&object->data.picture.mime_type), (FLAC__byte*)mime_type, new_length+1)) return false; } else { object->data.picture.mime_type = mime_type; } free(old); object->length -= old_length; object->length += new_length; return true; } FLAC_API FLAC__bool FLAC__metadata_object_picture_set_description(FLAC__StreamMetadata *object, FLAC__byte *description, FLAC__bool copy) { FLAC__byte *old; size_t old_length, new_length; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_PICTURE); FLAC__ASSERT(description != NULL); old = object->data.picture.description; old_length = old? strlen((const char *)old) : 0; new_length = strlen((const char *)description); /* do the copy first so that if we fail we leave the object untouched */ if (copy) { if (new_length >= SIZE_MAX) /* overflow check */ return false; if (!copy_bytes_(&object->data.picture.description, description, new_length+1)) return false; } else { object->data.picture.description = description; } free(old); object->length -= old_length; object->length += new_length; return true; } FLAC_API FLAC__bool FLAC__metadata_object_picture_set_data(FLAC__StreamMetadata *object, FLAC__byte *data, FLAC__uint32 length, FLAC__bool copy) { FLAC__byte *old; FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_PICTURE); FLAC__ASSERT((data != NULL && length > 0) || (data == NULL && length == 0 && copy == false)); old = object->data.picture.data; /* do the copy first so that if we fail we leave the object untouched */ if (copy) { if (!copy_bytes_(&object->data.picture.data, data, length)) return false; } else { object->data.picture.data = data; } free(old); object->length -= object->data.picture.data_length; object->data.picture.data_length = length; object->length += length; return true; } FLAC_API FLAC__bool FLAC__metadata_object_picture_is_legal(const FLAC__StreamMetadata *object, const char **violation) { FLAC__ASSERT(object != NULL); FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_PICTURE); return FLAC__format_picture_is_legal(&object->data.picture, violation); }

↑ V701 realloc() possible leak: when realloc() fails in allocating memory, original pointer 'object->data.vorbis_comment.comments' is lost. Consider assigning realloc() to a temporary pointer.

↑ V522 There might be dereferencing of a potential null pointer 'object->data.seek_table.points'.

↑ V526 The 'strcmp' function returns 0 if corresponding strings are equal. Consider examining the condition for mistakes.

↑ V526 The 'memcmp' function returns 0 if corresponding buffers are equal. Consider examining the condition for mistakes.

↑ V769 The 'object->data.vorbis_comment.comments' pointer in the expression could be nullptr. In such case, resulting value of arithmetic operations on this pointer will be senseless and it should not be used.

↑ V769 The 'eq' pointer in the 'eq - entry.entry' expression could be nullptr. In such case, resulting value will be senseless and it should not be used.

↑ V769 The 'track->indices' pointer in the 'track->indices + track->num_indices' expression could be nullptr. In such case, resulting value will be senseless and it should not be used.

↑ V769 The 'object->data.cue_sheet.tracks' pointer in the expression could be nullptr. In such case, resulting value of arithmetic operations on this pointer will be senseless and it should not be used.

↑ V801 Decreased performance. It is better to redefine the first function argument as a pointer. Consider replacing 'const .. entry' with 'const .. *entry'.

↑ V813 Decreased performance. The 'point' argument should probably be rendered as a constant pointer.

↑ V813 Decreased performance. The 'entry' argument should probably be rendered as a constant pointer.

↑ V813 Decreased performance. The 'indx' argument should probably be rendered as a constant pointer.