// Size of an image. size_t MuxImageDiskSize(const WebPMuxImage* const wpi) { size_t size = 0; if (wpi->header_ != NULL) size += ChunkDiskSize(wpi->header_); if (wpi->alpha_ != NULL) size += ChunkDiskSize(wpi->alpha_); if (wpi->img_ != NULL) size += ChunkDiskSize(wpi->img_); if (wpi->unknown_ != NULL) size += ChunkListDiskSize(wpi->unknown_); return size; }
WebPMuxError WebPMuxAssemble(WebPMux* mux, WebPData* assembled_data) { size_t size = 0; uint8_t* data = NULL; uint8_t* dst = NULL; WebPMuxError err; if (assembled_data == NULL) { return WEBP_MUX_INVALID_ARGUMENT; } // Clean up returned data, in case something goes wrong. memset(assembled_data, 0, sizeof(*assembled_data)); if (mux == NULL) { return WEBP_MUX_INVALID_ARGUMENT; } // Finalize mux. err = MuxCleanup(mux); if (err != WEBP_MUX_OK) return err; err = CreateVP8XChunk(mux); if (err != WEBP_MUX_OK) return err; // Allocate data. size = ChunkListDiskSize(mux->vp8x_) + ChunkListDiskSize(mux->iccp_) + ChunkListDiskSize(mux->anim_) + ImageListDiskSize(mux->images_) + ChunkListDiskSize(mux->exif_) + ChunkListDiskSize(mux->xmp_) + ChunkListDiskSize(mux->unknown_) + RIFF_HEADER_SIZE; data = (uint8_t*)WebPSafeMalloc(1ULL, size); if (data == NULL) return WEBP_MUX_MEMORY_ERROR; // Emit header & chunks. dst = MuxEmitRiffHeader(data, size); dst = ChunkListEmit(mux->vp8x_, dst); dst = ChunkListEmit(mux->iccp_, dst); dst = ChunkListEmit(mux->anim_, dst); dst = ImageListEmit(mux->images_, dst); dst = ChunkListEmit(mux->exif_, dst); dst = ChunkListEmit(mux->xmp_, dst); dst = ChunkListEmit(mux->unknown_, dst); assert(dst == data + size); // Validate mux. err = MuxValidate(mux); if (err != WEBP_MUX_OK) { WebPSafeFree(data); data = NULL; size = 0; } // Finalize data. assembled_data->bytes = data; assembled_data->size = size; return err; }