--- libgig/trunk/src/gig.cpp 2006/09/02 08:45:37 918 +++ libgig/trunk/src/gig.cpp 2007/03/02 01:04:45 1050 @@ -1,8 +1,8 @@ /*************************************************************************** * * - * libgig - C++ cross-platform Gigasampler format file loader library * + * libgig - C++ cross-platform Gigasampler format file access library * * * - * Copyright (C) 2003-2005 by Christian Schoenebeck * + * Copyright (C) 2003-2007 by Christian Schoenebeck * * * * * * This library is free software; you can redistribute it and/or modify * @@ -285,10 +285,11 @@ pCk3gix = waveList->GetSubChunk(CHUNK_ID_3GIX); if (pCk3gix) { - SampleGroup = pCk3gix->ReadInt16(); + uint16_t iSampleGroup = pCk3gix->ReadInt16(); + pGroup = pFile->GetGroup(iSampleGroup); } else { // '3gix' chunk missing - // use default value(s) - SampleGroup = 0; + // by default assigned to that mandatory "Default Group" + pGroup = pFile->GetGroup(0); } pCkSmpl = waveList->GetSubChunk(CHUNK_ID_SMPL); @@ -312,7 +313,7 @@ // use default values Manufacturer = 0; Product = 0; - SamplePeriod = 1 / SamplesPerSecond; + SamplePeriod = uint32_t(1000000000.0 / SamplesPerSecond + 0.5); MIDIUnityNote = 64; FineTune = 0; SMPTEOffset = 0; @@ -363,7 +364,7 @@ * Usually there is absolutely no need to call this method explicitly. * It will be called automatically when File::Save() was called. * - * @throws DLS::Exception if FormatTag != WAVE_FORMAT_PCM or no sample data + * @throws DLS::Exception if FormatTag != DLS_WAVE_FORMAT_PCM or no sample data * was provided yet * @throws gig::Exception if there is any invalid sample setting */ @@ -398,9 +399,22 @@ // make sure '3gix' chunk exists pCk3gix = pWaveList->GetSubChunk(CHUNK_ID_3GIX); if (!pCk3gix) pCk3gix = pWaveList->AddSubChunk(CHUNK_ID_3GIX, 4); + // determine appropriate sample group index (to be stored in chunk) + uint16_t iSampleGroup = 0; // 0 refers to default sample group + File* pFile = static_cast(pParent); + if (pFile->pGroups) { + std::list::iterator iter = pFile->pGroups->begin(); + std::list::iterator end = pFile->pGroups->end(); + for (int i = 0; iter != end; i++, iter++) { + if (*iter == pGroup) { + iSampleGroup = i; + break; // found + } + } + } // update '3gix' chunk pData = (uint8_t*) pCk3gix->LoadChunkData(); - memcpy(&pData[0], &SampleGroup, 2); + memcpy(&pData[0], &iSampleGroup, 2); } /// Scans compressed samples for mandatory informations (e.g. actual number of total sample points). @@ -621,13 +635,13 @@ * enlarged samples before calling File::Save() as this might exceed the * current sample's boundary! * - * Also note: only WAVE_FORMAT_PCM is currently supported, that is - * FormatTag must be WAVE_FORMAT_PCM. Trying to resize samples with + * Also note: only DLS_WAVE_FORMAT_PCM is currently supported, that is + * FormatTag must be DLS_WAVE_FORMAT_PCM. Trying to resize samples with * other formats will fail! * * @param iNewSize - new sample wave data size in sample points (must be * greater than zero) - * @throws DLS::Excecption if FormatTag != WAVE_FORMAT_PCM + * @throws DLS::Excecption if FormatTag != DLS_WAVE_FORMAT_PCM * or if \a iNewSize is less than 1 * @throws gig::Exception if existing sample is compressed * @see DLS::Sample::GetSize(), DLS::Sample::FrameSize, @@ -1138,6 +1152,18 @@ } } + /** + * Returns pointer to the Group this Sample belongs to. In the .gig + * format a sample always belongs to one group. If it wasn't explicitly + * assigned to a certain group, it will be automatically assigned to a + * default group. + * + * @returns Sample's Group (never NULL) + */ + Group* Sample::GetGroup() const { + return pGroup; + } + Sample::~Sample() { Instances--; if (!Instances && InternalDecompressionBuffer.Size) { @@ -2669,17 +2695,132 @@ +// *************** Group *************** +// * + + /** @brief Constructor. + * + * @param file - pointer to the gig::File object + * @param ck3gnm - pointer to 3gnm chunk associated with this group or + * NULL if this is a new Group + */ + Group::Group(File* file, RIFF::Chunk* ck3gnm) { + pFile = file; + pNameChunk = ck3gnm; + ::LoadString(pNameChunk, Name); + } + + Group::~Group() { + } + + /** @brief Update chunks with current group settings. + * + * Apply current Group field values to the respective. You have to call + * File::Save() to make changes persistent. + */ + void Group::UpdateChunks() { + // make sure <3gri> and <3gnl> list chunks exist + RIFF::List* _3gri = pFile->pRIFF->GetSubList(LIST_TYPE_3GRI); + if (!_3gri) _3gri = pFile->pRIFF->AddSubList(LIST_TYPE_3GRI); + RIFF::List* _3gnl = _3gri->GetSubList(LIST_TYPE_3GNL); + if (!_3gnl) _3gnl = pFile->pRIFF->AddSubList(LIST_TYPE_3GNL); + // now store the name of this group as <3gnm> chunk as subchunk of the <3gnl> list chunk + ::SaveString(CHUNK_ID_3GNM, pNameChunk, _3gnl, Name, String("Unnamed Group"), true, 64); + } + + /** + * Returns the first Sample of this Group. You have to call this method + * once before you use GetNextSample(). + * + * Notice: this method might block for a long time, in case the + * samples of this .gig file were not scanned yet + * + * @returns pointer address to first Sample or NULL if there is none + * applied to this Group + * @see GetNextSample() + */ + Sample* Group::GetFirstSample() { + // FIXME: lazy und unsafe implementation, should be an autonomous iterator + for (Sample* pSample = pFile->GetFirstSample(); pSample; pSample = pFile->GetNextSample()) { + if (pSample->GetGroup() == this) return pSample; + } + return NULL; + } + + /** + * Returns the next Sample of the Group. You have to call + * GetFirstSample() once before you can use this method. By calling this + * method multiple times it iterates through the Samples assigned to + * this Group. + * + * @returns pointer address to the next Sample of this Group or NULL if + * end reached + * @see GetFirstSample() + */ + Sample* Group::GetNextSample() { + // FIXME: lazy und unsafe implementation, should be an autonomous iterator + for (Sample* pSample = pFile->GetNextSample(); pSample; pSample = pFile->GetNextSample()) { + if (pSample->GetGroup() == this) return pSample; + } + return NULL; + } + + /** + * Move Sample given by \a pSample from another Group to this Group. + */ + void Group::AddSample(Sample* pSample) { + pSample->pGroup = this; + } + + /** + * Move all members of this group to another group (preferably the 1st + * one except this). This method is called explicitly by + * File::DeleteGroup() thus when a Group was deleted. This code was + * intentionally not placed in the destructor! + */ + void Group::MoveAll() { + // get "that" other group first + Group* pOtherGroup = NULL; + for (pOtherGroup = pFile->GetFirstGroup(); pOtherGroup; pOtherGroup = pFile->GetNextGroup()) { + if (pOtherGroup != this) break; + } + if (!pOtherGroup) throw Exception( + "Could not move samples to another group, since there is no " + "other Group. This is a bug, report it!" + ); + // now move all samples of this group to the other group + for (Sample* pSample = GetFirstSample(); pSample; pSample = GetNextSample()) { + pOtherGroup->AddSample(pSample); + } + } + + + // *************** File *************** // * File::File() : DLS::File() { + pGroups = NULL; pInfo->UseFixedLengthStrings = true; } File::File(RIFF::File* pRIFF) : DLS::File(pRIFF) { + pGroups = NULL; pInfo->UseFixedLengthStrings = true; } + File::~File() { + if (pGroups) { + std::list::iterator iter = pGroups->begin(); + std::list::iterator end = pGroups->end(); + while (iter != end) { + delete *iter; + ++iter; + } + delete pGroups; + } + } + Sample* File::GetFirstSample(progress_t* pProgress) { if (!pSamples) LoadSamples(pProgress); if (!pSamples) return NULL; @@ -2732,6 +2873,10 @@ } void File::LoadSamples(progress_t* pProgress) { + // Groups must be loaded before samples, because samples will try + // to resolve the group they belong to + LoadGroups(); + if (!pSamples) pSamples = new SampleList; RIFF::File* file = pRIFF; @@ -2895,6 +3040,79 @@ } } + Group* File::GetFirstGroup() { + if (!pGroups) LoadGroups(); + // there must always be at least one group + GroupsIterator = pGroups->begin(); + return *GroupsIterator; + } + + Group* File::GetNextGroup() { + if (!pGroups) return NULL; + ++GroupsIterator; + return (GroupsIterator == pGroups->end()) ? NULL : *GroupsIterator; + } + + /** + * Returns the group with the given index. + * + * @param index - number of the sought group (0..n) + * @returns sought group or NULL if there's no such group + */ + Group* File::GetGroup(uint index) { + if (!pGroups) LoadGroups(); + GroupsIterator = pGroups->begin(); + for (uint i = 0; GroupsIterator != pGroups->end(); i++) { + if (i == index) return *GroupsIterator; + ++GroupsIterator; + } + return NULL; + } + + Group* File::AddGroup() { + if (!pGroups) LoadGroups(); + // there must always be at least one group + __ensureMandatoryChunksExist(); + Group* pGroup = new Group(this, NULL); + pGroups->push_back(pGroup); + return pGroup; + } + + void File::DeleteGroup(Group* pGroup) { + if (!pGroups) LoadGroups(); + std::list::iterator iter = find(pGroups->begin(), pGroups->end(), pGroup); + if (iter == pGroups->end()) throw gig::Exception("Could not delete group, could not find given group"); + if (pGroups->size() == 1) throw gig::Exception("Cannot delete group, there must be at least one default group!"); + // move all members of this group to another group + pGroup->MoveAll(); + pGroups->erase(iter); + delete pGroup; + } + + void File::LoadGroups() { + if (!pGroups) pGroups = new std::list; + // try to read defined groups from file + RIFF::List* lst3gri = pRIFF->GetSubList(LIST_TYPE_3GRI); + if (lst3gri) { + RIFF::List* lst3gnl = lst3gri->GetSubList(LIST_TYPE_3GNL); + if (lst3gnl) { + RIFF::Chunk* ck = lst3gnl->GetFirstSubChunk(); + while (ck) { + if (ck->GetChunkID() == CHUNK_ID_3GNM) { + pGroups->push_back(new Group(this, ck)); + } + ck = lst3gnl->GetNextSubChunk(); + } + } + } + // if there were no group(s), create at least the mandatory default group + if (!pGroups->size()) { + Group* pGroup = new Group(this, NULL); + pGroup->Name = "Default Group"; + pGroups->push_back(pGroup); + } + } + // *************** Exception ***************